Method and apparatus for treating raw coal gas

Abstract

The application provides a raw coal gas treatment method and a treatment device. The raw coal gas treatment method comprises the following steps: spraying ammonia water and a polymerization inhibitor on the raw coal gas; the spraying amount of the polymerization inhibitor is 1-100 g / m 3 According to the raw coal gas treatment method, the temperature of the raw coal gas can be reduced by spraying ammonia water on the raw coal gas, so that the raw coal gas is rapidly cooled. The polymerization inhibitor is sprayed on the raw coal gas, and the polymerization inhibitor is used to prevent the polymerization reaction, so that the polymerization reaction of the raw coal gas during the rapid cooling process can be reduced, the yield of heavy component organic matters after the raw coal gas treatment is reduced, the yield of light component organic matters is increased, and the production profit is effectively improved.

Description

Technical Field

[0001] This application relates to the field of coking, and in particular to a method and equipment for treating raw coal gas. Background Technology

[0002] A coke oven is the main thermal equipment used in coking, where coal is converted into coke. The dusty gas produced during coking is called raw coal gas. The main components of raw coal gas include coal gas, steam, coal tar gas, ammonia, benzene hydrocarbons, hydrogen sulfide, and other sulfides. This raw coal gas, containing impurities, can be processed to extract chemical products such as coal tar, ammonia, hydrogen sulfide, hydrogen cyanide, and crude benzene, as well as the coal gas itself.

[0003] However, in related technologies, the tar extracted after processing raw coal gas contains a higher proportion of heavy organic components and a lower proportion of light organic components. It should be noted that the difference between light and heavy organic components lies in their molecular weight. Light organic components are essentially low-molecular-weight monomers, which can be polymerized into high-molecular-weight polymers, i.e., heavy organic components. Light organic components can be used as raw materials and have higher value, while heavy organic components have lower value. Because the tar extracted after processing raw coal gas contains a higher proportion of heavy organic components and a lower proportion of light organic components, the added value of the tar is relatively low. Summary of the Invention

[0004] The purpose of this application is to provide a method and equipment for treating raw coal gas, so as to increase the yield of light organic components after raw coal gas treatment. The specific technical solution is as follows:

[0005] The first aspect of this application provides a method for treating raw coal gas, comprising the following steps:

[0006] The raw coal gas was sprayed with a polymerization inhibitor and ammonia water;

[0007] Based on the volume of the raw coal gas, the spraying amount of the polymerization inhibitor is 1 to 100 g / m³. 3 .

[0008] According to the raw coal gas treatment method of this application, spraying ammonia water onto the raw coal gas allows for heat exchange between the ammonia water and the raw coal gas, lowering the temperature and thus rapidly cooling the raw coal gas. Spraying a polymerization inhibitor onto the raw coal gas allows the inhibitor molecules to react with chain free radicals, forming non-free radical substances or low-activity free radicals, thereby terminating or slowing down polymerization. This reduces polymerization reactions during rapid cooling, increases the yield of light organic components, and improves production profits. Specifically, the inventors' experimental research has found that in related technologies, due to the highly complex chemical composition of raw coal gas and the presence of a large amount of unsaturated organic matter, the process of cooling the raw coal gas with ammonia water causes a large amount of organic matter to undergo polymerization reactions, polymerizing high-value light organic components into low-value heavy organic components, leading to a decrease in profits. The inventors' experimental research has proven that, in this application, spraying a polymerization inhibitor onto raw coal gas can effectively reduce the polymerization reaction during the cooling process, thereby reducing the yield of heavy organic components after raw coal gas treatment, such as lowering the content of anthracene oil and pitch in the tar obtained after raw coal gas treatment, and increasing the yield of light organic components, such as increasing the content of light oil, phenolic oil, and naphthalene oil in the tar. Since the economic value of light organic components is higher than that of heavy organic components, increasing the yield of light organic components after raw coal gas treatment can effectively increase production profits. Based on current market conditions, for a coking plant with an annual coke production of 1 million tons, this could increase profits by 50 million yuan per year.

[0009] In some embodiments of this application, a polymerization inhibitor is sprayed onto the raw coal gas before ammonia is sprayed onto it.

[0010] In some embodiments of this application, ammonia water is sprayed onto the raw coal gas while a polymerization inhibitor is sprayed onto the raw coal gas.

[0011] A second aspect of this application provides a raw coal gas treatment device, comprising: a coke oven for producing raw coal gas; a riser pipe installed on the top of the coke oven for allowing the raw coal gas to pass through; a bridge pipe connected to the riser pipe for allowing the raw coal gas from the riser pipe to pass through; and an injection device for spraying a solution into the riser pipe and / or the bridge pipe, the solution being the ammonia water and the polymerization inhibitor, or a mixed solution of the ammonia water and the polymerization inhibitor.

[0012] In this application, the raw coal gas treatment equipment includes an injection device for spraying ammonia water and a polymerization inhibitor, or a mixed solution of polymerization inhibitor and ammonia water, into the riser pipe and / or the bridge pipe. The ammonia water is used to absorb the heat of the raw coal gas in the riser pipe and / or the bridge pipe, thereby rapidly cooling the raw coal gas. The polymerization inhibitor is used to reduce polymerization reactions. By spraying ammonia water and a polymerization inhibitor, or a mixed solution of polymerization inhibitor and ammonia water, into the riser pipe and / or the bridge pipe, polymerization reactions of the raw coal gas during the cooling process can be reduced, increasing the yield of light organic components and improving production profits. Specifically, through experimental research, the inventors have found that in related technologies, due to the very complex chemical composition of raw coal gas and the presence of a large amount of unsaturated organic matter, the process of cooling the raw coal gas with injected ammonia water causes a large amount of organic matter to undergo polymerization reactions, polymerizing high-value light organic components into low-value heavy organic components, leading to a decrease in profits. The inventors' experimental research has proven that, in this application, by spraying raw coal gas with a polymerization inhibitor or a mixture of the polymerization inhibitor and ammonia, the polymerization reaction of the raw coal gas during the cooling process can be effectively reduced, thereby reducing the yield of heavy organic components after raw coal gas treatment, such as reducing the content of anthracene oil and pitch in the tar obtained after raw coal gas treatment, and increasing the yield of light organic components, such as increasing the content of light oil, phenolic oil and naphthalene oil in the tar. Since the economic value of light organic components is higher than that of heavy organic components, increasing the yield of light organic components after raw coal gas treatment can effectively increase production profits. According to the current market conditions, for a coking plant with an annual coke production of 1 million tons, this can increase profits by 50 million yuan per year.

[0013] In some embodiments of this application, the solution is a mixed solution of the ammonia and the polymerization inhibitor, the spraying device includes a nozzle and a pipe, the pipe is for supplying the mixed solution of the ammonia and the polymerization inhibitor, the nozzle is connected to the pipe and is used to spray out the mixed solution of the ammonia and the polymerization inhibitor, and the nozzle is installed in the riser pipe and / or the bridge pipe.

[0014] In some embodiments of this application, the solution is a mixed solution of the ammonia and the polymerization inhibitor, the spraying device includes a nozzle and two pipes, one of the two pipes is for the ammonia to pass through, the other of the two pipes is for the polymerization inhibitor to pass through, the two pipes are respectively connected to the nozzle, the nozzle is used to spray out the mixed solution of the ammonia and the polymerization inhibitor, and the nozzle is installed in the riser pipe and / or the bridge pipe.

[0015] In some embodiments of this application, the solution is the ammonia water and the polymerization inhibitor, and the spraying device includes a first spraying assembly and a second spraying assembly; the first spraying assembly includes a first nozzle and a first pipe communicating with the first nozzle, the first pipe being used to supply the ammonia water, the first nozzle being installed inside the bridge pipe, and the first nozzle being used to spray the ammonia water; the second spraying assembly includes a second nozzle and a second pipe communicating with the second nozzle, the second pipe being used to supply the polymerization inhibitor, the second nozzle being installed inside the riser pipe or the bridge pipe, and the second nozzle being used to spray the polymerization inhibitor.

[0016] Of course, any product implementing this application does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a flowchart illustrating the raw coal gas treatment method according to the first embodiment of this application;

[0019] Figure 2 This is a flowchart illustrating the raw coal gas treatment method according to the second embodiment of this application;

[0020] Figure 3 This is the raw coal gas treatment equipment according to the first embodiment of this application;

[0021] Figure 4 This is the raw coal gas treatment equipment according to the second embodiment of this application;

[0022] Figure 5 for Figure 4 An enlarged schematic diagram of part A;

[0023] Figure 6 This is the raw coal gas treatment equipment according to the third embodiment of this application;

[0024] Figure 7 for Figure 6 An enlarged schematic diagram of part B.

[0025] In the diagram: 10, raw coal gas treatment equipment; 100, injection device; 110, nozzle; 120, pipeline; 130, first injection assembly; 131, first nozzle; 132, first pipeline; 140, second injection assembly; 141, second nozzle; 142, second pipeline; 200, coke oven; 300, riser pipe; 400, bridge pipe; 500, gas collecting pipe. Detailed Implementation

[0026] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art based on this application are within the scope of protection of this application.

[0027] As mentioned in the background section, in related technologies, the tar and crude benzene extracted after the treatment of raw coal gas have a higher proportion of heavy organic components and a lower proportion of light organic components, resulting in lower production profits.

[0028] In view of this, the first aspect of this application proposes a method for treating raw coal gas, used to process high-temperature raw coal gas from a coke oven 200. The raw coal gas treatment method includes the following steps:

[0029] Spray polymerization inhibitors and ammonia water onto the raw coal gas;

[0030] Based on the volume of raw coal gas, the spraying amount of the polymerization inhibitor is 1 to 100 g / m³. 3 .

[0031] According to the raw coal gas treatment method of this application, spraying ammonia water onto the raw coal gas allows for heat exchange between the ammonia water and the raw coal gas, lowering its temperature and thus rapidly cooling it. Spraying a polymerization inhibitor onto the raw coal gas reduces polymerization reactions. This reduces polymerization reactions during the rapid cooling process, increases the yield of light organic components, and improves production profits. Specifically, the inventors' experimental research has revealed that in related technologies, due to the highly complex chemical composition of raw coal gas and the presence of a large amount of unsaturated organic matter, the process of cooling the raw coal gas with ammonia water causes a large amount of organic matter to undergo polymerization reactions, polymerizing high-value light organic components into low-value heavy organic components, leading to a decrease in profits. The inventors' experimental research has proven that, in this application, by spraying a polymerization inhibitor onto raw coal gas, the polymerization reaction of the raw coal gas during the cooling process can be effectively reduced, thereby reducing the yield of heavy organic components after raw coal gas treatment, such as reducing the content of anthracene oil and pitch in the tar obtained after raw coal gas treatment, and increasing the yield of light organic components, such as increasing the content of light oil, phenolic oil and naphthalene oil in the tar. Since the economic value of light organic components is higher than that of heavy organic components, increasing the yield of light organic components after raw coal gas treatment can effectively increase production profits. According to current market conditions, for a coking plant with an annual coke production of 1 million tons, this can increase profits by 50 million yuan per year.

[0032] like Figure 1 As shown, in some embodiments of this application, before spraying ammonia water onto the raw coal gas in step S2, a polymerization inhibitor is sprayed onto the raw coal gas in step S1. In this application, during operation, the polymerization inhibitor is sprayed onto the raw coal gas first, and then ammonia water is sprayed onto the raw coal gas. Since the polymerization inhibitor is sprayed before the raw coal gas is cooled, the polymerization reaction of the raw coal gas during the cooling process can be effectively reduced.

[0033] like Figure 2 As shown, in some embodiments of this application, while spraying ammonia water onto the raw coal gas in step S2', a polymerization inhibitor is sprayed onto the raw coal gas in step S1'. Thus, the ammonia water and the polymerization inhibitor are sprayed simultaneously. The polymerization inhibitor can reduce the polymerization reaction during the cooling process of the raw coal gas, thereby increasing the yield of light organic components and improving production profits. Furthermore, spraying the polymerization inhibitor simultaneously with the ammonia water spraying also means that the raw coal gas begins to cool down at the same time as the polymerization inhibitor is sprayed, thus improving the component stability of the polymerization inhibitor.

[0034] In some embodiments of this application, while spraying ammonia water onto the raw coal gas in step S2', a polymerization inhibitor is sprayed onto the raw coal gas in step S1'. Specifically, this includes spraying a mixed solution of ammonia water and the polymerization inhibitor onto the raw coal gas. In this application, by spraying the mixed solution, the polymerization inhibitor is sprayed simultaneously with the ammonia water spraying onto the raw coal gas, making the operation simple and easy to control. By spraying the mixed solution containing the polymerization inhibitor, the polymerization reaction of the raw coal gas during the cooling process can be reduced, increasing the yield of light organic components, thereby increasing production profits.

[0035] In some embodiments of this application, while ammonia water is sprayed onto the raw coal gas in step S2', a polymerization inhibitor is sprayed onto the raw coal gas in step S1'. Specifically, ammonia water is sprayed onto the raw coal gas separately through a first nozzle, while a polymerization inhibitor is sprayed onto the raw coal gas separately through a second nozzle. In this application, the polymerization inhibitor is sprayed onto the raw coal gas separately through the second nozzle to reduce the polymerization reaction of the raw coal gas during the first cooling treatment. Since the polymerization inhibitor is sprayed separately, it is convenient to adjust the spraying state of the polymerization inhibitor, such as the spraying amount and spraying position.

[0036] In some embodiments of this application, the mass ratio of the polymerization inhibitor to ammonia is 1:(50-2000). This allows for rapid cooling of the raw coal gas with good cooling effect.

[0037] like Figure 3 , Figure 4 and Figure 6 As shown, a second aspect of this application discloses a raw coal gas treatment device 10. The raw coal gas treatment device 10 includes a coke oven 200, a riser pipe 300, a bridge pipe 400, and an injection device 100. The coke oven 200 is used to generate raw coal gas; the riser pipe 300 is installed at the top of the coke oven 200 and is used to supply raw coal gas. The bridge pipe 400 is connected to the riser pipe 300 and is used to supply raw coal gas from the riser pipe 300. The injection device 100 is used to spray a solution into the riser pipe 300 and / or the bridge pipe 400, the solution being ammonia and a polymerization inhibitor, or a mixture of ammonia and a polymerization inhibitor.

[0038] In this application, the raw coal gas treatment equipment 10 includes an injection device 100, which is used to spray ammonia water and a polymerization inhibitor, or a mixed solution of polymerization inhibitor and ammonia water, into the riser pipe 300 and / or bridge pipe 400. The ammonia water is used to absorb the heat of the raw coal gas within the riser pipe 300 and / or bridge pipe 400, thereby rapidly cooling the raw coal gas. The polymerization inhibitor is used to reduce polymerization reactions. By spraying ammonia water and a polymerization inhibitor, or a mixed solution of polymerization inhibitor and ammonia water, into the riser pipe 300 and / or bridge pipe 400, polymerization reactions of the raw coal gas during the cooling process can be reduced, increasing the yield of light organic components and improving production profits. Specifically, through experimental research, the inventors have found that in related technologies, due to the highly complex chemical composition of raw coal gas and the presence of a large amount of unsaturated organic matter, the process of cooling the raw coal gas with injected ammonia water causes a large amount of organic matter to undergo polymerization reactions, polymerizing high-value light organic components into low-value heavy organic components, leading to a decrease in profits. The inventors' experimental research has proven that, in this application, by spraying raw coal gas with a polymerization inhibitor or a mixture of the polymerization inhibitor and ammonia, the polymerization reaction of the raw coal gas during the cooling process can be effectively reduced, thereby reducing the yield of heavy organic components after raw coal gas treatment, such as reducing the content of anthracene oil and pitch in the tar obtained after raw coal gas treatment, and increasing the yield of light organic components, such as increasing the content of light oil, phenolic oil and naphthalene oil in the tar. Since the economic value of light organic components is higher than that of heavy organic components, increasing the yield of light organic components after raw coal gas treatment can effectively increase production profits. According to the current market conditions, for a coking plant with an annual coke production of 1 million tons, this can increase profits by 50 million yuan per year.

[0039] like Figure 3 As shown, in some embodiments of this application, the solution is a mixture of ammonia and a polymerization inhibitor. The injection device 100 includes a nozzle 110 and a pipe 120. The pipe 120 is used to supply the mixture of ammonia and the polymerization inhibitor. The nozzle 110 is connected to the pipe 120 and is used to spray the mixture of ammonia and the polymerization inhibitor. The nozzle 110 is installed in the riser pipe 300 and / or the bridge pipe 400. In this application, the solution sprayed by the injection device 100 is a mixture of ammonia and the polymerization inhibitor. Therefore, the polymerization inhibitor can be sprayed simultaneously with the ammonia spraying into the raw coal gas, thereby reducing the polymerization reaction during the cooling process of the raw coal gas, increasing the yield of light organic components, and increasing production profits. In this application, the pipe 120 is used to supply the mixture of ammonia and the polymerization inhibitor. Therefore, only one pipe 120 needs to be installed, making the installation of the pipe 120 convenient and the connection structure between the pipe 120 and the nozzle 110 simple.

[0040] like Figure 4 and Figure 5As shown, in some embodiments of this application, the solution is a mixture of ammonia and a polymerization inhibitor. The injection device 100 includes a nozzle 110 and two pipes 120. One of the two pipes 120 is used to supply ammonia, and the other is used to supply the polymerization inhibitor. The two pipes 120 are respectively connected to the nozzle 110, which is used to spray the mixture of ammonia and the polymerization inhibitor. The nozzle 110 is installed in the riser pipe 300 and / or the bridge pipe 400. In this application, the solution sprayed by the injection device 100 is a mixture of ammonia and the polymerization inhibitor. Therefore, the polymerization inhibitor can be sprayed simultaneously with the ammonia spraying into the raw coal gas, thereby reducing the polymerization reaction during the cooling process of the raw coal gas, increasing the yield of light organic components, and increasing production profits. In this application, two pipes 120 are provided. One pipe 120 is used to supply ammonia water, and the other pipe 120 is used to supply polymerization inhibitor. The two pipes 120 are respectively connected to the nozzle 110. This allows for easy adjustment of the flow rate ratio of ammonia water and polymerization inhibitor, resulting in a better combination effect between ammonia water and polymerization inhibitor, thereby improving the effect of polymerization inhibitor.

[0041] like Figure 6 and Figure 7 As shown, in some embodiments of this application, the solution is ammonia and a polymerization inhibitor. The spraying device 100 includes a first spraying assembly 130 and a second spraying assembly 140. The first spraying assembly 130 includes a first nozzle 131 and a first conduit 132 communicating with the first nozzle 131. The first conduit 132 is used to supply ammonia. The first nozzle 131 is installed in the bridge pipe 400 and is used to spray ammonia. The second spraying assembly 140 includes a second nozzle 141 and a second conduit 142 communicating with the second nozzle 141. The second conduit 142 is used to supply polymerization inhibitor. The second nozzle 141 is installed in the riser pipe 300 or the bridge pipe 400 and is used to spray polymerization inhibitor. In this application, the first spraying component 130 is used to spray ammonia water, and the second spraying component 140 is used to spray polymerization inhibitor. By adjusting the first spraying component 130, the spraying state of ammonia water can be changed, and by adjusting the second spraying component 140, the spraying state of polymerization inhibitor can be changed. Thus, it is convenient to control the spraying state of ammonia water or polymerization inhibitor, such as the spraying position or spraying amount.

[0042] In one specific implementation, the first nozzle 131 and the second nozzle 141 are respectively installed inside the bridge pipe 400. The first nozzle 131 sprays a large amount of ammonia water inside the bridge pipe 400, and the raw coal gas exchanges heat with the ammonia water, thus lowering its temperature. The second nozzle 141 is installed inside the bridge pipe 400, and the lower temperature of the raw coal gas inside the bridge pipe 400 helps protect the second nozzle 141.

[0043] In one specific implementation, the first nozzle 131 is disposed within the bridge pipe 400, and the second nozzle 141 is disposed within the riser pipe 300. This allows for the spraying of a polymerization inhibitor before the raw coal gas is cooled, effectively reducing the polymerization reaction of the raw coal gas during the cooling process.

[0044] In one specific implementation, the first nozzle 131 can be made of cast iron, and the second nozzle 141 can be made of stainless steel. Since the polymerization inhibitor is corrosive, using stainless steel can effectively protect the second nozzle 141 and improve its corrosion resistance.

[0045] In some embodiments of this application, the flow rate ratio of the first nozzle 131 to the second nozzle 141 is (50-2000):1. Since a large amount of ammonia water needs to be sprayed during the cooling process of the raw coal gas to rapidly cool the raw coal gas from the coke oven 200 at 400-850°C to 80-90°C, the spray volume of the first nozzle 131 is much greater than that of the second nozzle 141. The volume of the second nozzle 141 can be smaller than that of the first nozzle 131, thereby saving costs.

[0046] In some embodiments of this application, the raw coal gas treatment equipment 10 further includes a gas collecting pipe 500, a gas-liquid separator, and a primary cooler. The inlet of the gas collecting pipe 500 is connected to the bridge pipe 400, and the outlet of the gas collecting pipe 500 is connected to the gas-liquid separator, which is connected to the primary cooler. Thus, ammonia water and raw coal gas in the bridge pipe 400 can enter the gas-liquid separator through the gas collecting pipe 500 and be separated there. The separated ammonia water re-enters the ammonia water tank for recycling. The separated raw coal gas then enters the primary cooler for a second cooling. In this application, ammonia water is sprayed through the injection device 100 to perform the first cooling of the raw coal gas. After the first cooling, the temperature of the raw coal gas is 80℃-90℃. The primary cooler then performs a second cooling to further reduce the temperature of the raw coal gas. After the second cooling, the temperature of the raw coal gas drops to 22℃-40℃ or below 22℃. This allows the extraction of tar components from the raw coal gas, facilitating further purification.

[0047] In some embodiments of this application, the raw coal gas treatment equipment 10 further includes a tar remover connected to the primary cooler. The tar remover is used to remove tar droplets from the raw coal gas to facilitate subsequent purification operations.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0049] All implementation schemes in this specification are described in a related manner. Similar or identical parts between implementation schemes can be referred to interchangeably. Each implementation scheme focuses on its differences from other implementation schemes. In particular, the system implementation scheme is described more simply because it is fundamentally similar to the method implementation scheme; relevant parts can be found in the descriptions of the method implementation scheme.

[0050] The above are merely preferred embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A method for treating raw coal gas, used to treat high-temperature raw coal gas from a coke oven, characterized in that, Includes the following steps: The raw coal gas was sprayed with a polymerization inhibitor and ammonia water; Based on the volume of the raw coal gas, the spraying amount of the polymerization inhibitor is 1 to 100 g / m³. 3 .

2. The method for treating raw coal gas according to claim 1, characterized in that, Before spraying ammonia water onto the raw coal gas, a polymerization inhibitor is sprayed onto the raw coal gas.

3. The method for treating raw coal gas according to claim 1, characterized in that, While spraying ammonia water onto the raw coal gas, a polymerization inhibitor is also sprayed onto the raw coal gas.

4. A raw coal gas treatment device, characterized in that, include: Coke oven (200), the coke oven being used to produce raw coal gas; A riser pipe (300) is installed on top of the coke oven (200) and is used to supply the raw coal gas. A bridge pipe (400) is connected to the riser pipe (300), and the bridge pipe (400) is used to allow the raw coal gas from the riser pipe (300) to pass through; A spraying device (100) is used to spray a solution into the riser pipe (300) and / or the bridge pipe (400), the solution being ammonia and a polymerization inhibitor, or a mixture of ammonia and a polymerization inhibitor.

5. The raw coal gas treatment equipment according to claim 4, characterized in that, The solution is a mixture of ammonia and the polymerization inhibitor. The injection device (100) includes a nozzle (110) and a pipe (120). The pipe (120) is used to allow the mixture of ammonia and the polymerization inhibitor to pass through. The nozzle (110) is connected to the pipe (120) and is used to spray out the mixture of ammonia and the polymerization inhibitor. The nozzle (110) is installed in the riser pipe (300) and / or the bridge pipe (400).

6. The raw coal gas treatment equipment according to claim 4, characterized in that, The solution is a mixture of ammonia and the polymerization inhibitor. The injection device (100) includes a nozzle (110) and two pipes (120). One of the two pipes (120) is used to supply the ammonia, and the other of the two pipes (120) is used to supply the polymerization inhibitor. The two pipes (120) are respectively connected to the nozzle (110). The nozzle (110) is used to spray the mixture of ammonia and the polymerization inhibitor. The nozzle (110) is installed in the riser pipe (300) and / or the bridge pipe (400).

7. The raw coal gas treatment equipment according to claim 4, characterized in that, The solution is the ammonia water and the polymerization inhibitor. The injection device (100) includes a first injection assembly (130) and a second injection assembly (140). The first injection assembly (130) includes a first nozzle (131) and a first pipe (132) connected to the first nozzle (131). The first pipe (132) is used to supply the ammonia water. The first nozzle (131) is installed in the bridge pipe (400) and is used to spray the ammonia water. The second injection assembly (140) includes a second nozzle (141) and a second pipe (142) connected to the second nozzle (141). The second pipe (142) is used to supply the polymerization inhibitor. The second nozzle (141) is installed in the riser pipe (300) or the bridge pipe (400) and is used to spray the polymerization inhibitor.

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