Abrégé

The present invention relates to a method and device for reducing volatilization of granular fertilizer and improving strength, which are suitable for granular ammonium bicarbonate or ammonium bicarbonate-based compound fertilizer. The granular fertilizer is treated in a vacuum packaging manner, and packaging tail gas is collected and purified, thereby mitigating the problems of thermal decomposition volatilization, hardening, pulverization and the like of the granular fertilizer in the long-term storage process in a packaging bag, improving the strength of the granular fertilizer, reducing the fragile and pulverization characteristics of the granular fertilizer, and improving the long-term storage quality of a granular fertilizer product.

Classes IPC  ?

• B65B 31/04 - Mise sous vide, sous pression ou sous gaz spécial, des réceptacles ou emballages pleins, au moyen d'ajutages par lesquels on envoie ou on retire de l'air ou d'autres gaz, p. ex. un gaz inerte
• B65D 81/20 - Réceptacles, éléments d'emballage ou paquets pour contenus présentant des problèmes particuliers de stockage ou de transport ou adaptés pour servir à d'autres fins que l'emballage après avoir été vidés de leur contenu fournissant une ambiance spécifique pour le contenu, p. ex. température supérieure ou inférieure à la température ambiante sous vide ou pression superatmosphérique ou en atmosphère spéciale, p. ex. sous gaz inerte
• B65B 31/02 - Remplissage, fermeture, ou remplissage et fermeture, de réceptacles dans des chambres maintenues en dépression ou en surpression ou contenant une atmosphère spéciale, p. ex. du gaz inerte
• C01C 1/26 - Carbonates ou bicarbonates d'ammonium
• B65B 31/06 - Mise sous vide, sous pression ou sous gaz spécial, des réceptacles ou emballages pleins, au moyen d'ajutages par lesquels on envoie ou on retire de l'air ou d'autres gaz, p. ex. un gaz inerte la tuyère étant disposée pour être introduite ou retirée de l'orifice du réceptacle rempli et opérant en conjonction avec les dispositifs de scellement de l'orifice du réceptacle

Abrégé

A demisting module (10), which comprises a plurality of demisting blades (1) and a positioning component for positioning the demisting blades (1), each demisting blade (1) having a certain extension height in the extension height direction. Each demisting blade (1) comprises a blade main body (2) and one or more hook portions (3). The blade main bodies (2) are formed in a wavy shape along the direction in which flue gas enters, and a plurality of wave crests are formed. Each hook portion (3) is constructed to extend outward from a wave crest of a blade main body (2) away from the blade main body (2) to form, between the hook portion (3) and the blade main body (2), a pocket portion facing flue gas entering the demisting module (10). When viewed in a direction perpendicular to the extension height, the width at an opening (5) of the pocket portion is configured to be smaller than the width at the middle section (6) of the pocket portion. The described demisting module (10) can effectively remove mist droplets entrained in purified flue gas during a wet desulfurization process, having advantages of being simple in structure, high in strength, low in processing difficulty and manufacturing costs, easy to clean, and the like.

Classes IPC  ?

• B01D 45/06 - Séparation de particules dispersées dans des gaz ou des vapeurs par gravité, inertie ou force centrifuge par inertie par inversion du sens de l'écoulement

Abrégé

The present application relates to an ammonia method-based decarbonization system. The ammonia method-based decarbonization system comprises an ammonia method-based decarbonization unit, an ammonium bicarbonate treatment unit, an additive supply unit, and a defoaming agent supply unit. The ammonia method-based decarbonization unit is configured to use an ammonia absorbent to remove carbon dioxide from flue gas containing carbon dioxide to generate ammonium bicarbonate; the ammonium bicarbonate treatment unit is connected to the ammonia method-based decarbonization unit and is configured to treat an ammonium bicarbonate solution from the ammonia method-based decarbonization unit; the additive supply unit is connected to the ammonium bicarbonate treatment unit and is configured to supply to the ammonium bicarbonate treatment unit an additive for increasing the crystallization particle size of the ammonium bicarbonate; and the defoaming agent supply unit is connected to the ammonia method-based decarbonization unit and is configured to supply a defoaming agent to the ammonia method-based decarbonization unit. In addition, the present application further relates to an operation method for the ammonia method-based decarbonization system. Therefore, the moisture content of ammonium bicarbonate produced in ammonia method-based decarbonization can be effectively reduced.

Classes IPC  ?

• B01D 53/14 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par absorption
• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide
• C01B 21/082 - Composés contenant de l'azote et des non-métaux

Abrégé

A method and apparatus for controlling ammonia escape and soluble particulate matter with low energy consumption in ammonia carbon capture. After ammonia desulfurization and carbon capture of a process gas containing sulfur oxides and carbon dioxide, since the gas contains free ammonia, a sulfuric acid solution and an aqueous solution are used to wash and remove ammonia, the sulfuric acid reacting with the ammonia to form ammonium sulfate, and the ammonium sulfate solution being sent to an ammonia desulfurization system to co-crystallize with a desulfurization by-product ammonium sulfate, to produce solid ammonium sulfate. Furthermore, the ammonium sulfate solution is treated by means of a membrane separation system (34), to achieve solution gradient control and system water balance. The technical process is simple, the ammonia removal effect is good, and soluble particulate matter in the gas is reduced. Investment and operation costs are low, and ammonium sulfate and ammonium bicarbonate fertilizers are produced as by-products, thereby achieving recycling of resources, and having good economic and social benefits.

Classes IPC  ?

• B01D 53/62 - Oxydes de carbone
• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide
• B01D 53/50 - Oxydes de soufre
• B01D 53/58 - Ammoniac

Abrégé

A method and a device for carbon capture of low-sulfur flue gas, co-production of a nitrogen fertilizer and control of ammonia escape, which method and device are applied to carbon capture of low-sulfur flue gas (such as natural gas flue gas) and co-production of a nitrogen fertilizer. A sulfur-containing oxide and the process gas of CO2 firstly enter an ammonia desulfurization device to perform desulfurization, so as to generate an ammonium sulfate chemical fertilizer; the desulfurized gas enters an ammonia decarburization device, so as to remove carbon dioxide from the gas and generate an ammonium bicarbonate chemical fertilizer, wherein the decarburized gas contains free ammonia; and a desulfurization circulating liquid is used for washing, and a washing liquid is returned to the decarburization device. For the part having an insufficient acid content in a low-sulfur flue gas desulfurization circulating liquid, sulfuric acid is added into the desulfurization circulating liquid to control the pH of the washing liquid; and an ammonium sulfate chemical fertilizer is generated by means of washing and is returned to a desulfurization functional area along with the desulfurization liquid, and then recovered into an ammonium sulfate chemical fertilizer product.

Classes IPC  ?

• B01D 53/75 - Procédés multi-étapes
• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide
• B01D 53/50 - Oxydes de soufre
• B01D 53/62 - Oxydes de carbone
• B01D 53/58 - Ammoniac
• C05C 3/00 - Engrais contenant d'autres sels d'ammonium ou l'ammoniac lui-même, p. ex. ammoniac liquide

Abrégé

gas1gas2gas3gas3gas2gas1gas0gas0gas0 represents the initial temperature of when the process gas enters the first-stage cooling functional area (2-1); a first cold source, which is used for cooling the first circulation liquid; a second cold source, which is used for cooling the second circulation liquid; and a third cold source, which is used for cooling the third circulation liquid, wherein the three cold sources are different from each other. In the apparatus and method, circulation water, a closed cooling tower or an air cooler, and a cold process gas, a refrigeration liquid or a refrigerating machine are used for staged cooling, and a low-energy-consumption cooling capacity and a recycled-process-gas cooling capacity are fully utilized, thereby saving on investment and reducing the energy consumption.

Classes IPC  ?

• B01D 53/62 - Oxydes de carbone
• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide

Abrégé

22 absorption and ammonia removal in separate areas, the decarburization absorption efficiency is improved, the occurence of ammonia escape is reduced, and furthermore carbon dioxide in flue gas can be used for producing ammonium bicarbonate, which can be used as a nitrogen fertilizer.

Classes IPC  ?

• B01D 53/62 - Oxydes de carbone
• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide

Abrégé

22. The reaction condition control comprises temperature control, pH control and pressure control. Flue gas enters a decarburization tower, graded absorption is used, and concentration control, temperature control and multi-point ammonia addition are performed, thereby improving decarburization efficiency, saving the decarburization operation cost, and controlling ammonia escape.

Classes IPC  ?

• B01D 53/62 - Oxydes de carbone
• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide

Abrégé

A device and method for controlling ammonia escape of an ammonia-based decarbonization system. Ammonia is used as desulfurization and decarbonization agents. Gas first enters a desulfurization device to be subjected to desulfurization, so as to generate an ammonium sulfate chemical fertilizer; the desulfurized gas enters a decarbonization device to remove carbon dioxide in the gas, thereby generating an ammonium bicarbonate chemical fertilizer. The decarbonized gas contains free ammonia, and an acidic ammonium sulfate solution and an acidic water washing solution in an ammonia-based desulfurization method are used to absorb the free ammonia in the gas. According to the device and the method, ammonia escape of the ammonia-based decarbonization system is effectively controlled, and moreover, the ammonia recycled by washing can further be used for desulfurization, and the ammonia consumption is saved.

Classes IPC  ?

• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide
• B01D 53/58 - Ammoniac
• B01D 53/62 - Oxydes de carbone
• B01D 53/50 - Oxydes de soufre
• C05C 3/00 - Engrais contenant d'autres sels d'ammonium ou l'ammoniac lui-même, p. ex. ammoniac liquide

Abrégé

A method and device for waste heat recovery in an ammonia-based desulfurization and decarbonization system. The heat of a process gas (1) before desulfurization is used to remove the heat of a decarbonization system; before desulfurization, the process gas (1) passes through a gas heat exchanger (2) to heat an intermediate medium (14), and a refrigerator (3) is driven by the intermediate medium (14) to refrigerate; after a secondary refrigerant obtains cooling capacity, it cools down a decarbonized process gas by means of a liquid-liquid heat exchanger, thereby reducing energy consumption.

Classes IPC  ?

• B01D 53/34 - Épuration chimique ou biologique des gaz résiduaires
• B01D 53/50 - Oxydes de soufre
• B01D 53/62 - Oxydes de carbone
• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide

Abrégé

22 from a process gas in an absorber (2) by using ammonia as an absorbent, wherein the absorber comprises four or more stages of absorption, and a first-stage absorption (3), a second-stage absorption (8), a third-stage absorption (12), a fourth-stage absorption (16) and an optional higher-stage absorption are provided in the flowing direction of a process gas flow; and controlling the process gas temperature of the second-stage absorption (8) and the third-stage absorption (12) to be not lower than the process gas temperature of the first-stage absorption (3), and controlling the process gas temperatures of the fourth-stage absorption (16) and the optional higher-stage absorption to be lower than the process gas temperature of the first-stage absorption (3).

Classes IPC  ?

• B01D 53/14 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par absorption
• B01D 53/62 - Oxydes de carbone
• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide
• B01D 53/18 - Unités d'absorptionDistributeurs de liquides

Abrégé

23233 from flue gas, and achieve improvements in resolving flue gas tailings and aerosol generation.

Classes IPC  ?

• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide
• B01D 53/81 - Procédés en phase solide
• B01D 53/50 - Oxydes de soufre
• B01D 53/96 - Régénération, réactivation ou recyclage des réactifs
• F28D 21/00 - Appareils échangeurs de chaleur non couverts par l'un des groupes

Abrégé

2222 can be used to produce downstream products such as urea and soda ash, the product structure is flexibly adjusted, the byproduct ammonia water can be used, and "treatment of wastes with processes of wastes against one another" and a circular economy are truly realized.

Classes IPC  ?

• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide
• B01D 53/62 - Oxydes de carbone
• B01D 53/50 - Oxydes de soufre
• C01C 1/24 - Sulfates d'ammonium

Abrégé

Provided is a method for applying a membrane separation apparatus (24) to ammonia desulfurization, comprising an ammonia desulfurization apparatus and a membrane separation apparatus (24). The ammonia desulfurization apparatus comprises an absorption tower (1), the absorption tower (1) using circulation fluid desulfurization, and a water washing circulation fluid (10) washes the desulfurized flue gas. The circulation fluid of the ammonia desulfurization apparatus is fed into the membrane separation apparatus (24) for treatment, and the composition, temperature, and pH of the circulating absorption solution in each section of the ammonia desulfurization apparatus are controlled; after treatment, the concentrated solution is returned to the ammonia desulfurization apparatus, and the clear liquor from the membrane separation apparatus (24) is sent to a process water (15) system or to a water washing cycle (10).

Classes IPC  ?

• B01D 53/14 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par absorption
• B01D 61/02 - Osmose inverseHyperfiltration
• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide
• B01D 53/50 - Oxydes de soufre
• B01D 53/96 - Régénération, réactivation ou recyclage des réactifs

Abrégé

Controlling aerosol production during absorption in ammonia-based desulfurization. The absorption reaction temperature, the oxygen content and water content of the process gas may be controlled, and an absorption circulating liquid containing ammonium sulfite may be used for removing sulfur dioxide in flue gas, so as to control aerosol production during absorption in the ammonia-based desulfurization

Classes IPC  ?

• B01D 53/50 - Oxydes de soufre
• B01D 53/73 - Post-traitement des composants éliminés
• B01D 53/96 - Régénération, réactivation ou recyclage des réactifs
• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide

Abrégé

Apparatus and methods for treating acid gas (1), which utilize multi-stage absorption cycle of ammonia (9) desulfurization to treat acid tail gas (6) after pre-treatment of the acid gas (1), thereby achieving the purpose of efficient and low-cost treatment of acid tail gas (6). The parameters of the acid tail gas (6) may be adjusted by a regulatory system (7) such that the enthalpy value of the acid tail gas (6) is in the range of 60-850 kJ/kg dry gas, to meet the requirements of ammonia (9) desulfurization, and achieve the synergy between the acid gas (1) pre-treatment and ammonia (9) desulfurization. Furthermore, hydrogen sulfide may be converted into sulfur/sulfuric acid (3) plus ammonium sulfate (11) at an adjustable ratio.

Classes IPC  ?

• B01D 53/50 - Oxydes de soufre
• B01D 53/52 - Sulfure d'hydrogène

Abrégé

A method and a device for oxidizing an absorption solution for ammonia desulfurization in an oxidation column (1), wherein the absorption solution is sent to an oxidation column (1) from an absorption column (6) for ammonia desulfurization, and an oxidized solution is sent to the absorption column (6) for ammonia desulfurization from the oxidation column (1), thus realizing a multistage circulation of the absorption solution; and during the oxidation in the oxidation column (1), a pressurized air is used as the oxidation air, and a multistage air distribution is used, for a compulsory oxidation of the absorption solution, so as to decrease the investment and operation costs and control the production of aerosol during ammonia desulfurization.

Classes IPC  ?

• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide

Abrégé

Methods for applying ultra-clean ammonia-based desulfurization technology in carbon capture process. A flue gas, after ultra-clean ammonia-based desulfurization, may be directly fed into a carbon capture device for subsequent processing to realize ultra-clean emissions and the integration of desulfurization and decarbonization. This may significantly reduce the investment and operating costs for carbon capture.

Classes IPC  ?

• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide
• B01D 53/50 - Oxydes de soufre
• B01D 53/62 - Oxydes de carbone

Abrégé

Apparatus and methods for controlling aerosol production during absorption in ammonia desulfurization, by removing sulfur dioxide in flue gas with an absorption circulation liquid containing ammonium sulfite, so as to control the aerosol production during absorption in ammonia desulfurization. Efficient desulfurization and dust removal may be achieved by staged solution composition control and reaction condition control. At the same time ammonia escape and aerosol production during absorption may be controlled. The flue gas may be subjected to preliminary temperature lowering and purification, and may be allowed to contact with an absorption circulation liquid and a fine particle washing circulation liquid sequentially. Levels of solution compositions and reaction temperatures may be controlled.

Classes IPC  ?

• B01D 53/50 - Oxydes de soufre

Abrégé

Disclosed are a desulfurization absorption tower and a method for setting up the same and a method for operating the same. The desulfurization absorption tower comprises a tower body. A tower chamber is formed inside the tower body. The tower body is provided with a lower flue gas inlet (7) and an upper flue gas outlet (10) for guiding a flue gas, an upper circulating liquid inlet (6) and a lower circulating liquid outlet (8) for guiding a desulfurization absorption liquid, and a process water inlet (9) for supplementing a process water. The tower body comprises an internal anti-corrosion layer that is designed for contacting the flue gas and the desulfurization absorption liquid, defines the tower chamber, and is made of a stainless steel plate, and an external supporting layer that is designed for supporting the anti-corrosion layer and is made of carbon steel. The supporting layer and the anti-corrosion layer are designed to jointly bear a load, wherein the supporting layer is designed to bear a large part of the load, and the anti-corrosion layer is designed to bear a small part of the load.

Classes IPC  ?

• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide
• B01D 53/50 - Oxydes de soufre
• B01D 53/68 - Halogènes ou composés halogénés
• B01D 53/60 - Élimination simultanée des oxydes de soufre et des oxydes d'azote
• B01D 47/06 - Nettoyage par pulvérisation

Abrégé

Apparatus and methods for denitrification and desulfurization of and dust removal from an FCC tail gas by an ammonia-based process. The apparatus may include a first-stage waste heat recovery system, a denitrification system, a dust removal and desulfurization system, a tail gas exhaust system, and an ammonium sulfate post-processing system. The dust removal and desulfurization system may include a dedusting tower and an absorption tower disposed separately. The top and the bottom of the absorption tower may be connected respectively to the tail gas exhaust system and the ammonium sulfate post-processing system. The absorption tower may include sequentially, from bottom to top, an oxidation section, an absorption section, and a fine particulate control section. The methods may be implemented with the apparatus.

Classes IPC  ?

• B01D 53/86 - Procédés catalytiques
• B01D 53/90 - Injection de réactifs
• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide
• B01D 53/75 - Procédés multi-étapes
• B01D 53/56 - Oxydes d'azote
• B01D 53/50 - Oxydes de soufre
• B01D 47/06 - Nettoyage par pulvérisation
• F22B 1/18 - Méthodes de production de vapeur caractérisées par le genre de chauffage par exploitation de l'énergie thermique contenue dans une source chaude la source chaude étant un gaz chaud, p. ex. des gaz d'évacuation tels que les gaz d'échappement de moteurs à combustion interne
• C01C 1/245 - Préparation à partir de composés contenant de l'azote et du soufre

Abrégé

An ammonia-based desulfurization process through ammonia-adding in different chambers and an apparatus for implementing the process. An oxidation section comprises an oxidation chamber (2) and an ammonia-mixing chamber (6) in fluid communication with each other, and an ammonia absorbent (4) is added to the ammonia-mixing chamber (6).

Classes IPC  ?

• B01D 53/78 - Procédés en phase liquide avec un contact gaz-liquide
• B01D 53/50 - Oxydes de soufre
• B01D 53/76 - Procédés en phase gazeuse, p. ex. utilisant des aérosols