Equipment for co-processing arsenic-containing desulfurized gypsum slag by using organic solid waste
By carbonizing and pyrolyzing arsenic-containing desulfurized gypsum slag using medium-temperature and high-temperature pyrolysis furnaces, the high cost and corrosion problems of existing technologies for treating arsenic-containing desulfurized gypsum slag are solved, and the resource-based treatment and recycling of low-arsenic residues are realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2026-03-31
AI Technical Summary
Existing technologies for treating arsenic-containing desulfurization gypsum slag have several drawbacks, including large storage space requirements, high volume increase due to cement solidification, poor adaptability to chemical solidification, high costs, and the need for large amounts of pyrite in high-temperature reduction decomposition methods, which also generate sulfur dioxide that corrodes equipment.
A mixture of arsenic-containing desulfurized gypsum slag, pyrite, and external carbon source is carbonized and pyrolyzed using a medium-temperature pyrolysis furnace and a high-temperature pyrolysis furnace. Arsenic oxide is converted into gaseous form through chemical reaction, and refined white arsenic is collected using a condensation and arsenic collection chamber, which reduces the amount of pyrite used and reduces the generation of harmful gases.
It has achieved the harmless treatment of arsenic-containing desulfurized gypsum slag, reduced equipment corrosion and costs, effectively recovered resources, and reduced the amount of pyrite used and the generation of harmful gases.
Smart Images
Figure CN224058344U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hazardous solid waste treatment technology, and in particular to a device for co-processing arsenic-containing desulfurized gypsum slag containing organic solid waste. Background Technology
[0002] Arsenic-containing desulfurization gypsum slag, also known as arsenic-calcium slag, contains arsenic primarily in the form of calcium arsenate and arsenic oxide. The arsenic-containing desulfurization gypsum slag to be treated in this application has a moisture content of approximately 5%. Arsenic-containing desulfurization gypsum slag mainly originates from the non-ferrous metal smelting and chemical industries and is classified as hazardous solid waste. If not effectively disposed of, it will cause secondary pollution to the environment, primarily affecting soil and groundwater resources. It is estimated that China's copper smelting industry generates approximately 500,000 tons of arsenic-containing desulfurization gypsum slag annually, while the entire Chinese non-ferrous smelting industry has accumulated thousands of tons of arsenic-containing waste over the years. The treatment and disposal of arsenic-containing desulfurization gypsum slag (arsenic-calcium slag) has become a topic of high social concern. The urgent need for harmless or resource-based treatment of arsenic-containing desulfurization gypsum slag is of great significance.
[0003] Currently, the main methods for treating arsenic-containing desulfurization gypsum slag (arsenic-calcium slag) in China include: stockpiling, cement solidification, chemical solidification, and high-temperature reduction decomposition. Stockpiling is the most commonly used method by most enterprises, but it places extremely high demands on the stockpiling site and is also very difficult to maintain. Cement solidification can reduce the toxicity leaching of the waste slag to within the range required by national toxicity leaching standards, but it results in a large volume increase, and the treated slag cannot be utilized as a resource. Chemical solidification currently has poor adaptability and is only being tested in the laboratory with some raw materials; it cannot yet be applied industrially. High-temperature reduction decomposition typically uses pyrite to pyrolyze the arsenic-containing desulfurization gypsum slag, which requires a large amount of expensive pyrite, resulting in high costs, and also produces a large amount of sulfur dioxide, which corrodes equipment.
[0004] Therefore, there is a need to provide a device for the co-processing of arsenic-containing desulfurized gypsum slag from organic solid waste to solve the above-mentioned technical problems. Utility Model Content
[0005] This utility model provides a co-processing equipment for organic solid waste containing arsenic desulfurization gypsum slag, which can process the arsenic-containing desulfurization gypsum slag into a low-arsenic residue that is easy to handle; it can collect the first refined white arsenic, effectively recovering resources; it can reduce the generation of harmful gases and reduce equipment corrosion; it can reduce the amount of pyrite used and reduce costs.
[0006] The technical solution of this utility model is as follows:
[0007] A device for co-processing arsenic-containing desulfurized gypsum slag from organic solid waste, comprising:
[0008] The medium-temperature pyrolysis furnace is equipped with a medium-temperature furnace inlet and a medium-temperature furnace material outlet; the medium-temperature furnace inlet is used to input a mixture containing arsenic-containing desulfurized gypsum slag, pyrite and an external carbon source; the medium-temperature furnace material outlet is used to output the carbonized mixture.
[0009] A high-temperature pyrolysis furnace is provided with a high-temperature furnace inlet, a high-temperature furnace gas outlet, and a high-temperature furnace material outlet; the high-temperature furnace inlet is connected to the medium-temperature furnace material outlet; the high-temperature furnace gas outlet is used to output a first arsenic-containing gas; the high-temperature furnace material outlet is used to output low-arsenic residue; and...
[0010] The arsenic condensation chamber is equipped with a condensation inlet and a condensed solids outlet; the condensation inlet is connected to the gas outlet of the high-temperature furnace; the condensed solids outlet is used to output the first refined white arsenic.
[0011] The organic solid waste co-processing equipment for arsenic-containing desulfurized gypsum slag according to this utility model further includes a mixer, which is provided with a first mixing inlet, a second mixing inlet, a third mixing inlet, and a mixing outlet; the first mixing inlet is used to input an external carbon source; the second mixing inlet is used to input pyrite; the third mixing inlet is used to input arsenic-containing desulfurized gypsum slag; and the mixing outlet is used to output a mixture containing arsenic-containing desulfurized gypsum slag, pyrite, and an external carbon source.
[0012] The organic solid waste co-processing arsenic-containing desulfurized gypsum slag equipment of this utility model further includes a first dryer, which is provided with a first drying inlet and a first dried material outlet; the first drying inlet is used to input an external carbon source; the first dried material outlet is used to output a semi-dry external carbon source.
[0013] The organic solid waste co-processing arsenic-containing desulfurized gypsum slag equipment of this utility model further includes a second dryer, which is provided with a second drying inlet and a second dried material outlet; the second drying inlet is connected to the mixing outlet; the second dried material outlet is used to output the dehydrated mixed material.
[0014] In the organic solid waste co-treatment equipment for arsenic-containing desulfurized gypsum slag described in this utility model, the arsenic collection chamber further includes a condensation gas outlet for outputting a second arsenic-containing gas.
[0015] The organic solid waste co-treatment equipment for arsenic-containing desulfurized gypsum slag also includes a bag filter, which includes a dust collector inlet and a dust collector solid outlet; the dust collector inlet is connected to the condensate gas outlet; the dust collector solid outlet is used to output the second refined white arsenic.
[0016] The organic solid waste co-processing arsenic-containing desulfurized gypsum slag equipment of this utility model further includes a high-temperature filter, which is provided with a filter inlet and a filter gas outlet; the filter inlet is connected to the high-temperature furnace gas outlet; and the filter gas outlet is connected to the condensation inlet.
[0017] The organic solid waste co-processing arsenic-containing desulfurized gypsum slag equipment of this utility model further includes a slag cooler, which is provided with a slag inlet and a slag outlet; the slag inlet is connected to the material outlet of the high-temperature furnace; the slag outlet is used to output cooled low-arsenic material.
[0018] In the organic solid waste co-processing arsenic-containing desulfurized gypsum slag equipment of this utility model, the high-temperature filter further includes a filter solid outlet for outputting dust impurities, which is connected to the cold slag inlet.
[0019] In the organic solid waste co-treatment arsenic-containing desulfurized gypsum slag equipment of this utility model, the medium-temperature pyrolysis furnace is equipped with a medium-temperature furnace temperature regulating device for regulating the internal temperature of the medium-temperature pyrolysis furnace.
[0020] In the organic solid waste co-treatment arsenic-containing desulfurized gypsum slag equipment of this utility model, the high-temperature pyrolysis furnace is equipped with a high-temperature furnace temperature regulating device for regulating the temperature inside the high-temperature pyrolysis furnace.
[0021] Compared with existing technologies, the beneficial effects of this invention are as follows: The organic solid waste co-treatment equipment for arsenic-containing desulfurized gypsum slag first carbonizes the external carbon source in the mixture using a medium-temperature pyrolysis furnace and outputs the carbonized mixture. Then, it pyrolyzes the carbonized mixture in a high-temperature pyrolysis furnace. During this process, arsenic oxide is converted into a gaseous state, and carbon, calcium arsenate, and ferrous disulfide react, decomposing most of the calcium arsenate. The arsenic in the calcium arsenate is converted into gaseous arsenic oxide. The high-temperature furnace gas outlet and the high-temperature furnace material outlet output the first arsenic-containing gas and low-arsenic residue, respectively. The first arsenic-containing gas can be treated in a condensation and arsenic collection chamber to obtain the first refined white arsenic. The reaction of carbon, ferrous disulfide, and calcium arsenate can reduce the generation of harmful sulfur dioxide gas, reduce the degree of equipment corrosion, and reduce the amount of pyrite used, thus lowering costs. This utility model relates to an organic solid waste co-processing equipment for arsenic-containing desulfurized gypsum slag. It can process arsenic-containing desulfurized gypsum slag into easily processed low-arsenic residue; it can collect the first refined white arsenic, effectively recovering resources; it can reduce the generation of harmful gases and reduce equipment corrosion; it can reduce the amount of pyrite used and lower costs. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of this utility model.
[0023] Figure 1 The structural block diagram of the organic solid waste co-treatment equipment for arsenic-containing desulfurized gypsum slag provided in the preferred embodiment of this utility model is shown.
[0024] in,
[0025] 11. Medium-temperature pyrolysis furnace,
[0026] 12. High-temperature pyrolysis furnace,
[0027] 13. Arsenic condensation and collection chamber,
[0028] 14. Mixing machine
[0029] 15. First drying machine,
[0030] 16. Second drying machine,
[0031] 17. Baghouse dust collector
[0032] 18. High-temperature filter,
[0033] 19. Slag cooler.
[0034] In the diagram, units with similar structures are represented by the same labels. Detailed Implementation
[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0036] The directional terms mentioned in this utility model, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this utility model, and are not intended to limit this utility model.
[0037] The terms "first" and "second" in this utility model are used for descriptive purposes only and should not be construed as indicating or implying relative importance, nor as a restriction on the order of events.
[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0039] Existing equipment for treating arsenic-containing desulfurized gypsum slag utilizes pyrite to pyrolyze the slag. This requires a large amount of pyrite, which is expensive and results in high costs. Furthermore, it generates a large amount of sulfur dioxide, which corrodes the equipment.
[0040] The following is a preferred embodiment of an organic solid waste co-processing equipment for arsenic-containing desulfurized gypsum slag that can solve the above technical problems provided by this utility model.
[0041] Please refer to Figure 1 The co-processing equipment for arsenic-containing desulfurized gypsum slag containing organic solid waste includes a medium-temperature pyrolysis furnace 11, a high-temperature pyrolysis furnace 12, and a condensation and arsenic collection chamber 13. The medium-temperature pyrolysis furnace 11 has a medium-temperature furnace inlet and a medium-temperature furnace material outlet. The medium-temperature furnace inlet is used to input a mixture containing arsenic-containing desulfurized gypsum slag, pyrite, and an external carbon source. The medium-temperature furnace material outlet is used to output the carbonized mixture. The high-temperature pyrolysis furnace 12 has a high-temperature furnace inlet, a high-temperature furnace gas outlet, and a high-temperature furnace material outlet. The high-temperature furnace inlet is connected to the medium-temperature furnace material outlet. The high-temperature furnace gas outlet is used to output the first arsenic-containing gas. The high-temperature furnace material outlet is used to output low-arsenic residue. The condensation and arsenic collection chamber 13 has a condensation inlet and a condensate solids outlet; the condensation inlet is connected to the high-temperature furnace gas outlet. The condensate solids outlet is used to output the first refined white arsenic.
[0042] A medium-temperature pyrolysis furnace 11 obtains a mixture containing arsenic-containing desulfurized gypsum slag, pyrite, and an external carbon source. This mixture is fed into the furnace through the inlet. The furnace heats and carbonizes the mixture using the external carbon source, and outputs the carbonized mixture through the material outlet. A high-temperature pyrolysis furnace 12 obtains the carbonized mixture and feeds it into the furnace through the inlet. The furnace pyrolysis furnace 12 pyrolyzes the mixture, outputting a first arsenic-containing gas through the gas outlet and low-arsenic residue through the material outlet. A condensation and arsenic collection chamber 13 obtains the first arsenic-containing gas and feeds it into the condensation and arsenic collection chamber through the condensation inlet. The first refined white arsenic is output through the condensed solids outlet.
[0043] The following chemical reactions may occur in the high-temperature pyrolysis furnace 12:
[0044] 2Ca3(AsO4)2+3FeS2+C+10.25O2(g)=6CaSO4+1.5Fe2O3+As4O6(g)+CO2(g)
[0045] 2Ca3(AsO4)2+3FeS2+C+10O2(g)=6CaSO4+Fe3O4+As4O6(g)+CO2(g)
[0046] 2Ca3(AsO4)2+3FeS2+C+9.75O2(g)=6CaSO4+1.5Fe2O3+As4O6(g)+CO(g)
[0047] 2Ca3(AsO4)2+3FeS2+C+7O2(g)=6CaO+6SO2(g)+Fe3O4+As4O6(g)+CO2(g)
[0048] 2Ca3(AsO4)2+2FeS2+C+4.5O2(g)=6CaO+4SO2(g)+Fe2O3+As4O6(g)+CO2(g)
[0049] This invention relates to a co-processing equipment for arsenic-containing desulfurized gypsum slag from organic solid waste. First, an external carbon source in the mixture is carbonized in a medium-temperature pyrolysis furnace 11, and the carbonized mixture is output. Then, the carbonized mixture is pyrolyzed in a high-temperature pyrolysis furnace 12. During this process, arsenic oxide is converted to gas, and carbon, calcium arsenate, and ferrous disulfide react, decomposing most of the calcium arsenate and converting the arsenic in the calcium arsenate into gaseous arsenic oxide. A small portion of the non-decomposable calcium arsenate reacts with ferrous disulfide, water, and oxygen, and the arsenic exists in the form of calcium arsenate. Calcium arsenate is a stable mineral, essentially insoluble in water, facilitating subsequent landfill disposal. The high-temperature furnace gas outlet and the high-temperature furnace material outlet output the first arsenic-containing gas and low-arsenic residue, respectively. The first arsenic-containing gas can be treated in the condensation and arsenic collection chamber 13 to obtain the first refined white arsenic. The reaction of carbon, ferrous disulfide, and calcium arsenate can reduce the generation of harmful sulfur dioxide gas, reduce equipment corrosion, and reduce the amount of pyrite used, thus lowering costs. This utility model relates to an organic solid waste co-processing equipment for arsenic-containing desulfurized gypsum slag. It can process arsenic-containing desulfurized gypsum slag into easily processed low-arsenic residue; it can collect the first refined white arsenic, effectively recovering resources; it can reduce the generation of harmful gases and reduce equipment corrosion; it can reduce the amount of pyrite used and lower costs.
[0050] The mixed materials obtained by the medium-temperature pyrolysis furnace 11 have external carbon sources of municipal silt, lake bottom silt and river bottom mud, which can effectively utilize organic waste.
[0051] The co-processing equipment for arsenic-containing desulfurized gypsum slag containing organic solid waste also includes a mixer 14, which is equipped with a first mixing inlet, a second mixing inlet, a third mixing inlet, and a mixing outlet. The first mixing inlet is used to input an external carbon source; the second mixing inlet is used to input pyrite; the third mixing inlet is used to input arsenic-containing desulfurized gypsum slag; and the mixing outlet is used to output a mixture containing arsenic-containing desulfurized gypsum slag, pyrite, and the external carbon source. The mixer 14 acquires the external carbon source, pyrite, and arsenic-containing desulfurized gypsum slag, and inputs the external carbon source into the mixer 14 through the first mixing inlet, the pyrite into the mixer 14 through the second mixing inlet, and the arsenic-containing desulfurized gypsum slag into the mixer 14 through the third mixing inlet. The mixer 14 mixes the external carbon source, pyrite, and the dried arsenic-containing desulfurized gypsum slag, and outputs a mixture containing the arsenic-containing desulfurized gypsum slag, pyrite, and the external carbon source through the mixing outlet. The thorough mixing of external carbon source, pyrite and arsenic-containing desulfurized gypsum slag facilitates the full pyrolysis reaction in the high-temperature pyrolysis furnace 12.
[0052] The co-treatment equipment for arsenic-containing desulfurized gypsum slag containing organic solid waste also includes a first dryer 15, which is equipped with a first drying inlet and a first dried material outlet. The first drying inlet is used to input an external carbon source; the first dried material outlet is used to output a semi-dry external carbon source. The first dryer 15 obtains the external carbon source and inputs it through the first drying inlet to dry it. The semi-dry external carbon source is then output through the first dried material outlet. The moisture content of the external carbon source is approximately 60%. The first dryer 15 transforms the external carbon source into a semi-dry state, facilitating the mixing of the mixture by the mixer 14.
[0053] The co-processing equipment for arsenic-containing desulfurized gypsum slag containing organic solid waste also includes a second dryer 16, which is equipped with a second drying inlet and a second dried material outlet. The second drying inlet is connected to the mixing outlet. The second dried material outlet is used to output the dehydrated mixture. The second dryer 16 receives the mixture and inputs it through the second drying inlet for drying. The dehydrated mixture is then output through the second dried material outlet. This equipment can dehydrate the semi-dry external carbon source and the arsenic-containing desulfurized gypsum slag with a moisture content of 5% at low temperatures, facilitating subsequent rapid carbonization and saving energy.
[0054] The arsenic condensation chamber 13 also includes a condensate gas outlet for outputting the second arsenic-containing gas. The organic solid waste co-treatment equipment for arsenic-containing desulfurized gypsum slag also includes a bag filter 17, which includes a dust collector inlet and a dust collector solids outlet; the dust collector inlet is connected to the condensate gas outlet; the dust collector solids outlet is used to output the second refined white arsenic. The bag filter 17 acquires the second arsenic-containing gas and inputs it through the dust collector inlet. The bag filter 17 treats the second arsenic-containing gas and outputs the second refined white arsenic through the dust collector solids outlet. The second arsenic-containing gas can be further treated to recover the second refined white arsenic, improving the resource recovery rate.
[0055] The co-treatment equipment for arsenic-containing desulfurized gypsum slag from organic solid waste also includes a high-temperature filter 18, which has a filter inlet and a filter gas outlet. The filter inlet is connected to the high-temperature furnace gas outlet; the filter gas outlet is connected to the condenser inlet. The high-temperature filter 18 obtains the first arsenic-containing gas and inputs it through the filter inlet. The high-temperature filter 18 performs high-temperature dust removal on the first arsenic-containing gas and outputs the first arsenic-containing gas with the dust removed through the filter gas outlet. The high-temperature filter 18 can filter out dust, thereby improving the purity of the first and second refined arsenic.
[0056] The co-processing equipment for arsenic-containing desulfurization gypsum slag from organic solid waste also includes a slag cooler 19, which has a slag inlet and a slag outlet. The slag inlet is connected to the material outlet of the high-temperature furnace, and the slag outlet is used to output cooled, low-arsenic material. The slag cooler 19 obtains low-arsenic material, cools it, and then outputs the cooled low-arsenic material through the slag outlet. This effectively recovers the heat from the low-arsenic material and facilitates its storage.
[0057] The high-temperature filter also includes a filter solids outlet for discharging dust and impurities, which is connected to the cold slag inlet and can recover the heat from the dust and impurities discharged from the filter solids outlet.
[0058] The medium-temperature pyrolysis furnace is equipped with a medium-temperature furnace temperature regulation device to adjust the internal temperature of the furnace. The temperature of the medium-temperature pyrolysis furnace 11 can be set to 300℃-450℃ to meet the carbonization requirements of the external carbon source without wasting additional energy.
[0059] The high-temperature pyrolysis furnace is equipped with a high-temperature furnace temperature regulation device to adjust the internal temperature of the furnace. The temperature of the high-temperature pyrolysis furnace 12 can be set to 750℃-950℃ to meet the temperature required for the pyrolysis process without wasting additional energy.
[0060] The working process of the organic solid waste co-treatment equipment for arsenic-containing desulfurized gypsum slag according to a preferred embodiment of this utility model is as follows:
[0061] The first dryer 15 obtains an external carbon source and inputs the external carbon source into the first dryer 15 through the first dryer inlet to dry the external carbon source, and outputs a semi-dry external carbon source through the first dryer material outlet.
[0062] The mixer 14 obtains an external carbon source, pyrite, and arsenic-containing desulfurized gypsum slag. The external carbon source is input into the mixer 14 through the first mixing inlet, the pyrite is input into the mixer 14 through the second mixing inlet, and the arsenic-containing desulfurized gypsum slag is input into the mixer 14 through the third mixing inlet. The mixer 14 mixes the external carbon source, pyrite, and dried arsenic-containing desulfurized gypsum slag, and outputs the mixture containing arsenic-containing desulfurized gypsum slag, pyrite, and external carbon source through the mixing outlet.
[0063] The second dryer 16 obtains the mixture and inputs it into the second dryer 16 through the second dryer inlet to dry the mixture. The dehydrated mixture is then output through the second dryer material outlet.
[0064] The medium-temperature pyrolysis furnace 11 obtains a mixture containing arsenic-containing desulfurized gypsum slag, pyrite and an external carbon source, and inputs it into the medium-temperature pyrolysis furnace 11 through the medium-temperature furnace inlet. The medium-temperature pyrolysis furnace 11 heats and carbonizes the external carbon source of the mixture, and outputs the carbonized mixture through the medium-temperature furnace material outlet.
[0065] The high-temperature pyrolysis furnace 12 obtains carbonized mixture and inputs it into the high-temperature pyrolysis furnace 12 through the high-temperature furnace inlet. The high-temperature pyrolysis furnace 12 pyrolyzes the carbonized mixture and outputs the first arsenic-containing gas through the high-temperature furnace gas outlet and outputs low-arsenic residue through the high-temperature furnace material outlet.
[0066] The high-temperature filter 18 obtains the first arsenic-containing gas and inputs it into the high-temperature filter 18 through the filter inlet. The high-temperature filter 18 removes dust from the first arsenic-containing gas at high temperature and outputs the first arsenic-containing gas with the dust removed through the filter gas outlet.
[0067] The first arsenic-containing gas is obtained in the condensation and collection chamber 13 and is input into the condensation and collection chamber 13 through the condensation inlet, and the first refined white arsenic is output through the condensation solid outlet.
[0068] The bag filter 17 obtains the second arsenic-containing gas and inputs it into the bag filter 17 through the dust collector inlet. The bag filter 17 processes the second arsenic-containing gas and outputs the second refined white arsenic through the dust collector solid outlet.
[0069] The slag cooler 19 obtains low-arsenic materials, cools the low-arsenic materials, and outputs the cooled low-arsenic materials through the slag cooler outlet.
[0070] This completes the working process of the organic solid waste co-treatment equipment for arsenic-containing desulfurized gypsum slag in this preferred embodiment.
[0071] This invention relates to a co-processing equipment for arsenic-containing desulfurized gypsum slag from organic solid waste. First, an external carbon source in the mixture is carbonized in a medium-temperature pyrolysis furnace, and the carbonized mixture is output. Then, the carbonized mixture is pyrolyzed in a high-temperature pyrolysis furnace. During this process, arsenic oxide is converted to a gaseous state, and carbon, calcium arsenate, and ferrous disulfide react, decomposing most of the calcium arsenate. The arsenic in the calcium arsenate is converted into gaseous arsenic oxide. The high-temperature furnace gas outlet and the high-temperature furnace material outlet output the first arsenic-containing gas and low-arsenic residue, respectively. The first arsenic-containing gas can be treated in a condensation and arsenic collection chamber to obtain the first refined white arsenic. The reaction of carbon, ferrous disulfide, and calcium arsenate can reduce the generation of harmful sulfur dioxide gas, reduce equipment corrosion, and reduce the amount of pyrite used, thus lowering costs. This utility model relates to an organic solid waste co-processing equipment for arsenic-containing desulfurized gypsum slag. It can process arsenic-containing desulfurized gypsum slag into easily processed low-arsenic residue; it can collect the first refined white arsenic, effectively recovering resources; it can reduce the generation of harmful gases and reduce equipment corrosion; it can reduce the amount of pyrite used and lower costs.
[0072] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the concept of the technical solution of the present invention, should be included within the scope of protection of the present invention.
Claims
1. An organic solid waste co-processing apparatus for arsenic-containing desulfurization gypsum slag, characterized by, The equipment for treating organic solid waste and arsenic-containing desulfurization gypsum slag comprises a medium-temperature pyrolysis furnace, a high-temperature pyrolysis furnace, and a condensation arsenic recovery chamber. The equipment for treating organic solid waste and arsenic-containing desulfurization gypsum slag further comprises a first drying machine, which is provided with a first drying inlet and a first drying material outlet; the first drying inlet is used for inputting the external carbon source; and the first drying material outlet is used for outputting the semi-dry external carbon source. The equipment for treating organic solid waste and arsenic-containing desulfurization gypsum slag further comprises a second drying machine, which is provided with a second drying inlet and a second drying material outlet; the second drying inlet is connected to the mixing outlet; and the second drying material outlet is used for outputting the dehydrated mixed material. The condensation arsenic recovery chamber further comprises a condensation gas outlet, which is used for outputting the second arsenic-containing gas.
2. The organic solid waste co-processing apparatus of arsenic-containing desulfurization gypsum slag according to claim 1, characterized in that, The equipment for treating organic solid waste and arsenic-containing desulfurization gypsum slag further comprises a bag-type dust collector, which comprises a dust collector inlet and a dust collector solid outlet; the dust collector inlet is connected to the condensation gas outlet; and the dust collector solid outlet is used for outputting the second refined arsenic.
3. The organic solid waste co-processing apparatus of arsenic-containing desulfurization gypsum slag according to claim 2, characterized in that, The equipment for treating organic solid waste and arsenic-containing desulfurization gypsum slag further comprises a high-temperature filter, which is provided with a filter inlet and a filter gas outlet; the filter inlet is connected to the high-temperature furnace gas outlet; and the filter gas outlet is connected to the condensation inlet.
4. The organic solid waste co-processing apparatus of arsenic-containing desulfurization gypsum slag according to claim 3, characterized in that, The equipment for treating organic solid waste and arsenic-containing desulfurization gypsum slag further comprises a cold slag machine, which is provided with a cold slag inlet and a cold slag outlet; the cold slag inlet is connected to the high-temperature furnace material outlet; and the cold slag outlet is used for outputting the cooled low-arsenic material.
5. The organic solid waste co-processing apparatus of arsenic-containing desulfurization gypsum slag according to claim 1, characterized in that, The high-temperature filter further comprises a filter solid outlet, which is used for outputting dust impurities and is connected to the cold slag inlet. The medium-temperature pyrolysis furnace is provided with a medium-temperature furnace temperature adjusting device, which is used for adjusting the temperature inside the medium-temperature pyrolysis furnace.
6. The organic solid waste co-treatment arsenic-containing desulfurization gypsum residue device according to claim 5, characterized in that, 10. The equipment for treating organic solid waste and arsenic-containing desulfurization gypsum slag according to claim 1, wherein the high-temperature pyrolysis furnace is provided with a high-temperature furnace temperature adjusting device, which is used for adjusting the temperature inside the high-temperature pyrolysis furnace.
7. The organic solid waste co-treatment arsenic-containing desulfurization gypsum residue device according to claim 6, characterized in that, 8. The organic solid waste co-treatment arsenic-containing desulfurization gypsum residue device according to claim 7, characterized in that, 9. The organic solid waste co-processing apparatus of arsenic-containing desulfurization gypsum slag according to claim 1, characterized in that,