CN111717888A - Recycling process and system applied to chemical crude ammonia waste gas treatment instead of incineration - Google Patents
Recycling process and system applied to chemical crude ammonia waste gas treatment instead of incineration Download PDFInfo
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- CN111717888A CN111717888A CN202010579398.4A CN202010579398A CN111717888A CN 111717888 A CN111717888 A CN 111717888A CN 202010579398 A CN202010579398 A CN 202010579398A CN 111717888 A CN111717888 A CN 111717888A
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 168
- 239000002912 waste gas Substances 0.000 title claims abstract description 90
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 80
- 239000000126 substance Substances 0.000 title claims abstract description 27
- 238000004064 recycling Methods 0.000 title description 12
- 239000007789 gas Substances 0.000 claims abstract description 155
- 239000001257 hydrogen Substances 0.000 claims abstract description 46
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 46
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 44
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 43
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 43
- 239000011593 sulfur Substances 0.000 claims abstract description 43
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000002737 fuel gas Substances 0.000 claims abstract description 24
- 230000026676 system process Effects 0.000 claims abstract description 10
- 239000006227 byproduct Substances 0.000 claims abstract description 8
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 5
- 238000000746 purification Methods 0.000 claims description 39
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical group S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 34
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 34
- 238000006477 desulfuration reaction Methods 0.000 claims description 19
- 230000023556 desulfurization Effects 0.000 claims description 19
- 239000007853 buffer solution Substances 0.000 claims description 18
- 230000018044 dehydration Effects 0.000 claims description 17
- 238000006297 dehydration reaction Methods 0.000 claims description 17
- 229910000069 nitrogen hydride Inorganic materials 0.000 claims description 7
- 238000003795 desorption Methods 0.000 claims description 4
- 238000003421 catalytic decomposition reaction Methods 0.000 claims description 3
- 239000000047 product Substances 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 238000005008 domestic process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/04—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of inorganic compounds, e.g. ammonia
- C01B3/047—Decomposition of ammonia
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/50—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
- F23G7/065—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
- C01B2203/042—Purification by adsorption on solids
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
- C01B2203/0465—Composition of the impurity
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
- C01B2203/0465—Composition of the impurity
- C01B2203/0495—Composition of the impurity the impurity being water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2204/00—Supplementary heating arrangements
- F23G2204/10—Supplementary heating arrangements using auxiliary fuel
- F23G2204/103—Supplementary heating arrangements using auxiliary fuel gaseous or liquid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/20—Waste heat recuperation using the heat in association with another installation
- F23G2206/203—Waste heat recuperation using the heat in association with another installation with a power/heat generating installation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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- Combustion & Propulsion (AREA)
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- Environmental & Geological Engineering (AREA)
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- Thermal Sciences (AREA)
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- Treating Waste Gases (AREA)
Abstract
A resource process and a system for replacing incineration by treating chemical crude ammonia waste gas are disclosed, wherein the process comprises a main crude ammonia waste gas treatment process, a tail gas decomposition treatment process, a sulfur tail gas treatment process and a boiler system process; the crude ammonia waste gas is processed by the crude ammonia waste gas processing main process to generate hydrogen, tail gas generated by the crude ammonia waste gas processing main process is processed by a decomposition tail gas processing process to form decomposition waste gas, sulfur tail gas is subjected to secondary H2S removal by the sulfur tail gas processing process, desulfurized tail gas after H2S removal, decomposition waste gas and fuel gas are formed after the decomposition tail gas processing process to generate byproduct steam through a boiler system process. The invention also provides a system for implementing the process. The process and the system can produce hydrogen products with the purity of 99.99 percent and can produce by-product steam (180 ℃, 1.0 MPa).
Description
Technical Field
The invention relates to the technical field of recycling of crude ammonia tail gas, in particular to a recycling process and a recycling system applied to chemical crude ammonia waste gas treatment instead of incineration.
Background
In the domestic process chains in various fields of coal chemical industry or petrochemical industry, such as comprehensive utilization of tar and low-carbon alkane, crude ammonia tail gas is often generated along with sulfur tail gas. The two gases have both different points and a common point. The difference between the two methods is mainly as follows: the sulfur tail gas contains more free nitrogen and only contains other components (or almost no other components) which are easy to treat; the ammonia content of the crude ammonia tail gas is high (reaching 98.95 percent), and other components are hardly contained. The two have the following common points: all containing a small amount of H2S (with the sulfur tail gas containing about 200ppm and the crude ammonia tail gas containing about 700 ppm).
The traditional tail gas treatment method is to respectively prepare a desulphurization device for incineration treatment, consumes a large amount of fuel and oxygen, invests a large amount of capital, almost has no any resource product, and is great loss of economic benefit and social benefit.
Disclosure of Invention
In order to solve the problem that the traditional treatment of crude ammonia tail gas and sulfur tail gas can cause great waste of resources and economic benefits, the invention provides a resource process and a resource system which are applied to the treatment of chemical crude ammonia waste gas to replace incineration, the process can simultaneously treat crude ammonia tail gas and sulfur tail gas, the crude ammonia tail gas and the crude ammonia tail gas are subjected to ammonia decomposition to purify hydrogen, and the rest tail gas is taken as ammonia decomposition tail gas to be mixed with the sulfur tail gas for treatment, so that a high-purity hydrogen product can be produced, and a byproduct steam can be produced.
The purpose of the invention is realized by the following technical scheme.
Be applied to chemical industryThe resource process for replacing incineration by crude ammonia waste gas treatment comprises a crude ammonia waste gas treatment main process, a decomposition tail gas treatment process, a sulfur tail gas treatment process and a boiler system process; the crude ammonia waste gas is processed by the crude ammonia waste gas processing main process to generate hydrogen, tail gas generated by the crude ammonia waste gas processing main process is processed by a decomposition tail gas processing process to form decomposition waste gas, and the sulfur tail gas is processed by the sulfur tail gas processing process to carry out secondary H2S removal, H removal2And (4) forming decomposed waste gas and fuel gas after the desulfurization tail gas and the decomposed tail gas after the S are treated by the treatment process, and generating byproduct steam by a boiler system process.
The recycling process applied to chemical crude ammonia waste gas treatment instead of incineration comprises the following main processes:
(1) containing H2S、H2The crude ammonia waste gas of O enters a crude ammonia waste gas supply system through a crude ammonia waste gas supply pipeline;
(2) reaches a hydrogen sulfide removal system through a hydrogen sulfide removal inlet pipeline to remove H2S；
(3) The desulfurized crude ammonia waste gas reaches a dehydration system through a dehydration inlet pipeline to remove moisture;
(4) the dehydrated crude ammonia waste gas reaches an ammonia decomposition system through an ammonia decomposition inlet pipeline to generate NH3Catalytic decomposition reaction to produce H2、N2；
(5) The decomposed tail gas reaches a decomposed gas purification system through a decomposed gas purification inlet pipeline to remove residual NH3And removing H2O；
(6) The purified decomposed gas reaches a pressurization system through an inlet pipeline of the pressurization system, and is pressurized through a compressor so as to be convenient for hydrogen purification;
(7) the pressurized decomposed gas reaches a hydrogen purification system through a hydrogen purification inlet pipeline, hydrogen is prepared through a PSA process, and the hydrogen is supplied outside through a hydrogen output pipeline.
Preferably, in the step (2), H2The concentration of S is less than or equal to 3ppm (V/V).
Preferably, in the step (7), the purity of the prepared hydrogen is more than or equal to 99.99%.
The resource process applied to chemical crude ammonia waste gas treatment instead of incineration comprises the following steps:
(1) the desulfurization tail gas of the hydrogen sulfide removal system reaches a decomposition waste gas buffer system through a hydrogen sulfide removal tail gas pipeline;
(2) the dehydrated tail gas of the dehydration system reaches a decomposed waste gas buffer system through a dehydrated tail gas pipeline;
(3) tail gas of the decomposition gas purification system reaches a decomposition waste gas buffer system through a fuel gas supply system;
(4) the tail gas of the hydrogen purification system is divided into two paths through a hydrogen purification tail gas pipeline, one path of the tail gas reaches a decomposed waste gas buffer system through a hydrogen purification incineration tail gas pipeline, and the other path of the tail gas reaches a hydrogen sulfide removal system through a hydrogen purification desorption tail gas pipeline, so that the decomposed gas is provided for the hydrogen sulfide removal system;
(5) the desulfurization tail gas of the hydrogen sulfide removal system, the dehydration tail gas of the dehydration system, the tail gas of the decomposition gas purification system and the tail gas of the hydrogen purification system enter a decomposition waste gas buffer system to jointly form decomposition waste gas, and the decomposition waste gas reaches the desulfurization system through a decomposition gas tail gas pipeline.
The resource process applied to chemical crude ammonia waste gas treatment instead of incineration comprises the following steps: the sulfur tail gas reaches the sulfur system through a sulfur system inlet pipeline, and reaches the desulfurization system through a sulfur system tail gas pipeline to be subjected to secondary H2S removal.
The recycling process applied to chemical crude ammonia waste gas treatment instead of incineration comprises the following steps: removal of H2The desulfurized tail gas after S reaches a boiler system through a desulfurized tail gas pipeline; the supplementary fuel gas reaches a fuel gas supply system through a fuel gas inlet pipeline and reaches a boiler system through a fuel gas supply pipeline; the steam generated by the boiler system is conveyed through a steam external supply pipeline.
The system for implementing the recycling process applied to chemical crude ammonia waste gas treatment instead of incineration comprises a crude ammonia waste gas supply system, a hydrogen sulfide removal system, a dehydration system, an ammonia decomposition system, a decomposed gas purification system, a pressurization system, a hydrogen purification system, a decomposed gas buffer system, a sulfur system, a desulfurization system, a fuel gas supply system and a boiler system.
The invention has the beneficial effects that:
1. the invention is applied to the chemical crude ammonia waste gas treatment instead of the resource process of burning, and the process can produce hydrogen products with the purity of 99.99 percent.
2. The invention is a recycling process applied to chemical crude ammonia waste gas treatment to replace incineration, and the process can produce byproduct steam (180 ℃, 1.0 MPa).
3. According to the resource process applied to the chemical crude ammonia waste gas treatment instead of incineration, the ammonia decomposition tail gas after hydrogen extraction and the sulfur tail gas are mixed for treatment, so that the heat value of the sulfur tail gas is improved by 10 times, and the stability of the subsequent incineration process is improved; the heat value of the tail gas is improved, the consumption of fuel gas is saved, and the operation cost is greatly reduced; the fluctuation of tail gas treatment working conditions caused by the fluctuation of respective tail gas parameters is avoided, and the working condition adaptive range of tail gas treatment is enlarged by double-component mixed treatment; two tail gases are prevented from being respectively matched with a desulphurization device, so that the investment and the occupied area are saved.
Drawings
The aspects and advantages of the present application will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. In the drawings:
fig. 1 is a schematic diagram of a recycling process and a related system applied to chemical crude ammonia waste gas treatment instead of incineration according to an embodiment of the invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Referring to fig. 1, fig. 1 is a schematic diagram of a recycling process and related system for chemical crude ammonia waste gas treatment instead of incineration according to an embodiment of the present invention, and the system for implementing the recycling process for chemical crude ammonia waste gas treatment instead of incineration is composed of a crude ammonia waste gas supply system 101, a hydrogen sulfide removal system 102, a dehydration system 103, an ammonia decomposition system 104, a decomposition gas purification system 105, a pressurization system 106, a hydrogen purification system 107, a decomposition gas buffer system 108, a sulfur system 109, a desulfurization system 110, a fuel gas supply system 111, a boiler system 112, and accessories for matching pipes.
According to the attached drawing, the resource process applied to chemical crude ammonia waste gas treatment instead of incineration in the embodiment comprises a crude ammonia waste gas treatment main process, a decomposition tail gas treatment process, a sulfur tail gas treatment process and a boiler system process, wherein the crude ammonia waste gas is processed by the crude ammonia waste gas treatment main process to generate hydrogen, tail gas generated by the crude ammonia waste gas treatment main process is processed by the decomposition tail gas treatment process to form decomposition waste gas, and the sulfur tail gas is processed by the sulfur tail gas treatment process to be subjected to secondary H-level treatment2S removal, H removal2And (4) forming decomposed waste gas and fuel gas after the desulfurization tail gas and the decomposed tail gas after the S are treated by the treatment process, and generating byproduct steam by a boiler system process. The specific treatment process of each stage comprises the following steps:
1. the main process for treating the crude ammonia waste gas comprises the following steps:
(1) containing H2S (concentration of about 700ppm, V/V), H2The crude ammonia waste gas of O (concentration is about 0.98%, V/V) enters the crude ammonia waste gas supply system 101 through a crude ammonia waste gas supply pipeline 301;
(2) reaches the hydrogen sulfide removal system 102 through a hydrogen sulfide removal inlet pipeline 302 to remove H2S (guarantee H)2The concentration of S is less than or equal to 3ppm and V/V);
(3) the desulfurized crude ammonia waste gas reaches the dehydration system 103 through a dehydration inlet pipeline 303, and the moisture is removed (the dew point temperature is ensured to be less than or equal to-40 ℃);
(4) the dehydrated crude ammonia exhaust gas passes through ammonia decomposition inlet line 304 to ammonia decomposition system 104 where NH is generated3Catalytic decomposition reaction to produce H2、N2(the concentrations were 75% respectively、25％)；
(5) The decomposed tail gas reaches the decomposed gas purification system 105 through a decomposed gas purification inlet pipeline 305 to remove residual NH3And removing H2O；
(6) The purified decomposed gas reaches the pressurization system 106 through a pressurization system inlet pipeline 306 and is pressurized through a compressor so as to be convenient for hydrogen purification;
(7) the pressurized decomposed gas reaches a hydrogen purification system 107 through a hydrogen purification inlet pipeline 307, H2 product gas is prepared through a PSA process (the preferred parameters of the product hydrogen are that the purity is more than or equal to 99.99 percent and V/V), and the product gas is supplied outside through a hydrogen output pipeline 308;
2. the treatment process of the decomposed tail gas comprises the following steps:
(1) the sweet tail gas (containing a higher concentration of H) from the hydrogen sulfide removal system 1022S) reaches the decomposed waste gas buffer system 108 through a hydrogen sulfide removal tail gas pipeline 309;
(2) dehydration tail gas (containing higher concentration of H) of dehydration system 1032O，N2、NH3) Through the dehydrated tail gas line 310 to the decomposed waste gas buffer system 108;
(3) tail gas (containing a higher concentration of H) from the decomposition gas purification system 1052O、NH3) Through the fuel gas supply system 111 to the decomposed exhaust buffer system 108;
(4) tail gas (containing higher concentration of H) from hydrogen purification system 1072、N2) The waste gas is divided into two paths through a hydrogen purification tail gas pipeline 312, and one path of the waste gas reaches the decomposed waste gas buffer system 108 through a hydrogen purification incineration tail gas pipeline 312A; the other path of the tail gas reaches the hydrogen sulfide removal system 102 through a hydrogen purification desorption tail gas 312B pipeline to provide a desorption gas for the hydrogen sulfide removal system 102;
(5) the four tail gases enter a decomposed waste gas buffer system 108 to jointly form decomposed waste gas, and the decomposed waste gas reaches a desulfurization system 110 through a decomposed gas tail gas pipeline 313;
3. the sulfur tail gas treatment process comprises the following steps: the sulfur tail gas reaches the sulfur system 109 through a sulfur system inlet pipeline 314 and reaches the desulfurization system 110 through a sulfur system tail gas pipeline 315, and secondary H2S removal is carried out;
the sulfur system 109 mainly functions to filter the elemental sulfur powder/droplet (recover sulfur) in the sulfur tail gas, and prevent the sulfur from forming a paste body attached to the working surface of the desulfurization system 110 to affect the implementation of the desulfurization process after the gas carries the sulfur into the subsequent desulfurization system 110.
4. The boiler system process comprises the following steps: removal of H2The desulfurized tail gas after S reaches the boiler system 112 via the desulfurized tail gas line 316; supplemental fuel gas is passed to fuel gas supply system 111 via fuel gas inlet line 317 and to boiler system 112 via fuel gas supply line 318; steam (preferably having steam parameters of 1.0MPa, 180 ℃) generated by the boiler system 112 is transported to the plant area via steam export line 319.
In conclusion, the whole process is taken as a research system, crude ammonia tail gas, sulfur tail gas and a small amount of fuel gas used as auxiliary fuel are input into the boundary area, and hydrogen (the purity is more than or equal to 99.99%) and byproduct steam (1.0MPa and 180 ℃) are output from the boundary area.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. A resource process applied to chemical crude ammonia waste gas treatment for replacing incineration is characterized by comprising a crude ammonia waste gas treatment main process, a decomposition tail gas treatment process, a sulfur tail gas treatment process and a boiler system process; the crude ammonia waste gas is processed by the crude ammonia waste gas processing main process to generate hydrogen, tail gas generated by the crude ammonia waste gas processing main process is processed by a decomposition tail gas processing process to form decomposition waste gas, and the sulfur tail gas is processed by the sulfur tail gas processing process to be subjected to secondary H2S removal, H removal2And (4) forming decomposed waste gas and fuel gas after the desulfurization tail gas and the decomposed tail gas after the S are treated by the treatment process, and generating byproduct steam by a boiler system process.
2. The resource utilization process applied to chemical crude ammonia waste gas treatment instead of incineration according to claim 1, characterized in that the main process of crude ammonia waste gas treatment is as follows:
(1) containing H2S, H2, 2O, through a crude ammonia waste gas supply pipeline (301), into a crude ammonia waste gas supply system (101);
(2) reaches a hydrogen sulfide removal system (102) through a hydrogen sulfide removal inlet pipeline (302) to remove H2S；
(3) The desulfurized crude ammonia waste gas reaches a dehydration system (103) through a dehydration inlet pipeline (303) to remove moisture;
(4) the dehydrated crude ammonia waste gas reaches an ammonia decomposition system (104) through an ammonia decomposition inlet pipeline (304) to generate NH3Catalytic decomposition reaction to produce H2、N2；
(5) The decomposed tail gas reaches a decomposed gas purification system (105) through a decomposed gas purification inlet pipeline (305) to remove residual NH3And removing H2O；
(6) The purified decomposed gas reaches a pressurization system (106) through a pressurization system inlet pipeline (306) and is pressurized through a compressor so as to be purified by hydrogen;
(7) the pressurized decomposed gas reaches a hydrogen purification system (107) through a hydrogen purification inlet pipeline (307), hydrogen is prepared through a PSA process, and the hydrogen is supplied outside through a hydrogen output pipeline (308).
3. The resource utilization process applied to chemical crude ammonia waste gas treatment instead of incineration as claimed in claim 2, wherein in the step (2), H2The concentration of S is less than or equal to 3ppm (V/V).
4. The resource process applied to chemical crude ammonia waste gas treatment instead of incineration as claimed in claim 2, wherein the purity of the prepared hydrogen in the step (7) is not less than 99.99%.
5. The resource process applied to chemical crude ammonia waste gas treatment instead of incineration as claimed in claim 1, wherein the decomposition tail gas treatment process is as follows:
(1) the desulfurization tail gas of the hydrogen sulfide removal system (102) reaches a decomposition waste gas buffer system (108) through a hydrogen sulfide removal tail gas pipe (309);
(2) the dehydrated tail gas of the dehydration system (103) reaches the decomposed waste gas buffer system (108) through a dehydrated tail gas pipeline (310);
(3) tail gas of the decomposition gas purification system (105) reaches a decomposition waste gas buffer system (108) through a fuel gas supply system (111);
(4) tail gas of the hydrogen purification system (107) is divided into two paths through a hydrogen purification tail gas pipeline (312), one path reaches the decomposed waste gas buffer system (108) through a hydrogen purification incineration tail gas pipeline (312A), and the other path reaches the hydrogen sulfide removal system (102) through a hydrogen purification desorption tail gas pipeline (312B), so that the decomposed gas is provided for the hydrogen sulfide removal system (102);
(5) and the desulfurization tail gas of the hydrogen sulfide removal system (102), the dehydration tail gas of the dehydration system (103), the tail gas of the decomposed gas purification system (105) and the tail gas of the hydrogen purification system (107) enter a decomposed waste gas buffer system (108) to jointly form decomposed waste gas, and the decomposed waste gas reaches the desulfurization system (110) through a decomposed gas tail gas pipeline (313).
6. The resource process applied to chemical crude ammonia waste gas treatment instead of incineration as claimed in claim 1, wherein the sulfur tail gas treatment process is as follows: the sulfur tail gas reaches the sulfur system (109) through a sulfur system inlet pipeline (314) and reaches the desulfurization system (110) through a sulfur system tail gas pipeline (315) to carry out secondary H2And (4) removing the S.
7. The resource utilization process applied to chemical crude ammonia waste gas treatment instead of incineration as claimed in claim 1, wherein the boiler system process is as follows: removal of H2The desulfurized tail gas after S reaches a boiler system (112) through a desulfurized tail gas pipeline (316); make-up fuel gas is passed through fuel gas inlet line 317 to fuel gas supply system 111 and through fuel gas supply line 318 to boiler system 112; steam generated by the boiler system (112) is transported via a steam export line (319).
8. The system for implementing the resource process applied to chemical crude ammonia waste gas treatment instead of incineration in claim 1 is characterized by comprising a crude ammonia waste gas supply system (101), a hydrogen sulfide removal system (102), a dehydration system (103), an ammonia decomposition system (104), a decomposition gas purification system (105), a pressurization system (106), a hydrogen purification system (107), a decomposition gas buffer system (108), a sulfur system (109), a desulfurization system (110), a fuel gas supply system (111) and a boiler system (112).
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