Coke oven gas horizontal pipe cooler cleaning system

Abstract

The utility model provides a coke oven gas horizontal pipe cooler cleaning system which comprises a condensate circulating tank and a condensate pump, a condensate inlet pipe on the condensate pump is communicated with the condensate circulating tank, a condensate outlet pipe on the condensate pump is communicated with a spraying pipe in a primary cooler, the condensate inlet pipe is communicated with an ammonia water clarifying tank through a light tar pipe, and the condensate outlet pipe is communicated with an ammonia water clarifying tank through a light tar pipe. The light tar pipe is positioned at one end of the ammonia water clarifying tank and extends to the middle layer of the light tar, and a control valve is mounted on the light tar pipe. According to the coke oven gas horizontal pipe cooler cleaning system, the light tar pipe is additionally arranged, light tar in the middle layer of the ammonia water clarifying tank is guided into the primary cooler through the condensate inlet pipe and sprayed on the horizontal pipe in the primary cooler, and naphthalene on the horizontal pipe can be absorbed and cleaned. Attached accumulation of naphthalene is effectively reduced, resistance is reduced, and the primary cooler is prevented from being blocked.

Description

Technical Field

[0001] The present application relates to a primary cooler cleaning and naphthalene removal technology, and in particular to a coke oven gas horizontal tube cooler cleaning system. Background Art

[0002] Naphthalene is an organic substance in coke oven gas, which is easy to crystallize and precipitate at room temperature. When the raw gas enters the primary cooler and cools down, the temperature of the raw gas in contact with the primary cooler's horizontal tube drops, and the naphthalene in the raw gas precipitates and adheres to the primary cooler's horizontal tube. Long-term accumulation will increase the outer diameter of the horizontal tube and reduce the gap between the horizontal tubes, resulting in increased resistance in the primary cooler, sometimes reaching 1300Pa, which is much larger than the design standard of 1000Pa, causing a burden on the fan and primary cooler.

[0003] The conventional cleaning method is to clean by regular circulation of steam and hot ammonia water, which makes it difficult to remove the naphthalene attached to the transverse tubes, and the steam cleaning will affect the service life of the pre-cooler. Utility Model Content

[0004] The present application provides a coke oven gas horizontal tube cooler cleaning system, which is used to solve the problem that naphthalene attached to the horizontal tubes in the existing primary cooler is difficult to absorb and clean.

[0005] The present application provides a coke oven gas horizontal pipe cooler cleaning system, comprising a condensate circulation tank and a condensate pump, wherein the condensate inlet pipe on the condensate pump is connected to the condensate circulation tank, the condensate outlet pipe on the condensate pump is connected to the spray pipe in the primary cooler, the condensate inlet pipe is connected to the ammonia water clarification tank through a light tar pipe, the light tar pipe is located at one end of the ammonia water clarification tank and extends to the middle layer of light tar, and a control valve is installed on the light tar pipe.

[0006] Optionally, the control valve is a flow valve capable of adjusting the proportion of light tar.

[0007] Optionally, a detarrifier and an electric tar collector are also included, and the tar discharge ports of the detarrifier and the electric tar collector are connected to the condensate inlet pipe through pipelines respectively.

[0008] Optionally, the detarrifier is used to introduce a hot ammonia-water mixture into the electric tar collector through a pipeline.

[0009] Optionally, the ammonia clarification tank, tar remover and electric tar collector are connected to the venting tank through a pipeline, and the venting tank is connected to the condensate circulation tank or the condensate inlet pipe through a light tar pump. A vacuum pump is installed on the venting tank, and a three-way air intake valve for one-way air intake is installed at the end of the pipeline located at the ammonia clarification tank, the tar remover and the electric tar collector.

[0010] Optionally, the drain tank is buried in an underground antifreeze layer.

[0011] Compared with the prior art, the beneficial effects of the coke oven gas horizontal tube cooler cleaning system provided by the present application are:

[0012] The efficiency of washing naphthalene with tar is affected by the degree of saturation of naphthalene in tar. The light tar separated in the ammonia clarification tank has low naphthalene content, less ash and impurities, and has good absorption and cleaning ability for naphthalene adhering to the transverse tube of the primary cooler. By adding a light tar pipe, the light tar in the middle layer of the ammonia clarification tank is introduced into the primary cooler through the condensate inlet pipe and sprayed on the transverse tube in the primary cooler, which can absorb and clean the naphthalene on the transverse tube. It can effectively reduce the adhesion and accumulation of naphthalene, reduce resistance, and prevent blockage of the primary cooler. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 A schematic diagram of the connection of an ammonia clarification tank of a coke oven gas horizontal tube cooler cleaning system provided in one embodiment of the present application;

[0015] Figure 2 A schematic diagram of the connection between a tar remover and an electric tar collector of a coke oven gas cross-tube cooler cleaning system provided in one embodiment of the present application;

[0016] Figure 3 A schematic diagram of a series connection of a tar remover and an electric tar collector of a coke oven gas cross-tube cooler cleaning system provided in one embodiment of the present application;

[0017] Figure 4 A schematic diagram of the connection of a vent tank of a coke oven gas cross-tube cooler cleaning system provided in one embodiment of the present application.

[0018] Description of reference numerals:

[0019] Condensate circulation tank 1; condensate pump 2; condensate inlet pipe 3; condensate outlet pipe 4; primary cooler 5; ammonia clarification tank 6; light tar pipe 7; control valve 8; detarrifier 9; electric tar collector 10; vent tank 11; light tar pump 12; vacuum pump 13; three-way air inlet valve 14. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0021] like Figure 1 As shown, an embodiment of the present application provides a coke oven gas horizontal pipe cooler cleaning system, including a condensate circulation tank 1 and a condensate pump 2, wherein the condensate inlet pipe 3 on the condensate pump 2 is connected to the condensate circulation tank 1, and the condensate outlet pipe 4 on the condensate pump 2 is connected to the spray pipe in the primary cooler 5. The condensate inlet pipe 3 is connected to the ammonia water clarification tank 6 through a light tar pipe 7, and the light tar pipe 7 is located at one end of the ammonia water clarification tank 6 and extends to the middle layer of light tar. Through the light tar pipe 7, the layered light tar in the ammonia water clarification tank 6 can be extracted and introduced into the condensate inlet pipe 3, and sprayed on the horizontal pipe in the primary cooler 5 through the condensate outlet pipe 4 through the condensate inlet pipe 3. A control valve 8 is installed on the light tar pipe 7, and the addition of light tar is controlled by opening and closing the valve.

[0022] When in use, the condensate in the condensate circulation tank 1 is circulated into the primary cooler 5 through the condensate inlet pipe 3 through the condensate pump 2, and after cooling the raw gas, it flows back to the condensate circulation tank 1 from the condensate outlet pipe 4. The light tar separated from the ammonia clarification tank 6 is introduced into the condensate inlet pipe 3 through the light tar pipe 7, and enters the primary cooler 5 through the circulation of the condensate in the condensate inlet pipe 3, and is sprayed on the transverse pipe in the primary cooler 5 to remove naphthalene from the transverse pipe of the primary cooler 5 and reduce resistance.

[0023] In the present embodiment, the efficiency of washing naphthalene with tar is affected by the saturation degree of naphthalene in tar. The light tar separated in the ammoniacal solution settling tank 6 has low naphthalene content, few ash and impurities, and has good absorption and cleaning ability to the naphthalene adhering on the transverse tube of the primary cooler 5. By adding a light tar pipe 7, the light tar in the middle layer of the ammoniacal solution settling tank 6 is introduced into the primary cooler 5 through the condensate inlet pipe 3, sprayed on the transverse tube in the primary cooler 5, and can absorb and clean the naphthalene on the transverse tube. Effectively reduce the adhesion accumulation of naphthalene, reduce resistance, and prevent the primary cooler 5 from being blocked.

[0024] In a possible implementation, the control valve 8 is a flow valve capable of adjusting the proportion of light tar.

[0025] The amount of light tar entering the condensate inlet pipe 3 through the light tar pipe 7 can be adjusted by the control valve 8, thereby controlling the entering proportion of the light tar.

[0026] like Figure 2As shown, in a possible implementation, a detarrifier 9 and an electric tar collector 10 are further included, and the tar discharge ports of the detarrifier 9 and the electric tar collector 10 are respectively connected to the condensate inlet pipe 3 through pipelines.

[0027] The tar drawn out from the detarr 9 and the electric tar collector 10 is also an ideal light tar, which can fully meet the needs of absorption and cleaning of the cross pipe. It can be used alone for cleaning or as a supplement to the light tar in the ammonia clarification tank 6.

[0028] like Figure 3 As shown, in a possible implementation, the detarrifier 9 is used to introduce the hot ammonia-water mixture into the electric tar collector 10 through a pipeline.

[0029] In winter, hot ammonia water needs to be introduced into the electric tar collector liquid sealing tank in the electric tar collector 10 to prevent tar from solidifying. The tar in the detarrifier 9 contains hot ammonia water. Introducing the hot ammonia water mixture in the detarrifier 9 into the electric tar collector 10 can not only solve the problem of tar solidification in the electric tar collector 10, but also facilitate the light tar and hot ammonia water to be concentrated for cleaning the horizontal pipe of the primary cooler 5.

[0030] like Figure 4 As shown, in a possible implementation, the ammonia water clarification tank 6, the tar remover 9 and the electric tar collector 10 are connected to the vent tank 11 through a pipeline, and the vent tank 11 is connected to the condensate circulation tank 1 or the condensate inlet pipe 3 through a light tar pump 12. A vacuum pump 13 is installed on the vent tank 11, and a three-way air intake valve 14 for one-way air intake is installed at the end of the pipeline located at the ammonia water clarification tank 6, the tar remover 9 and the electric tar collector 10.

[0031] The light tar in the ammonia clarification tank 6, the detarring device 9 and the electric tar collector 10 can be centrally introduced into the venting tank 11, and after being evenly mixed, the light tar pump 12 uniformly mixes and cleans the mixture for use.

[0032] The negative pressure generated by the vacuum pump 13 in the venting tank 11 causes all the light tar in the pipelines connected to the ammonia clarification tank 6, the detarrifier 9 and the electric tar collector 10 to flow into the venting tank 11, thereby clearing the light tar in the pipeline and preventing the light tar in the pipeline from solidifying. When clearing the pipeline, the three-way air intake valve 14 allows air to flow in one direction, forming an air flow in the pipeline, driving the light tar in the pipeline to flow into the venting tank 11.

[0033] In a possible implementation, the drain tank 11 is buried in an underground antifreeze layer.

[0034] The venting tank 11 is buried in the underground antifreeze layer, which can keep the light tar inside it warm in winter and prevent the light tar in the venting tank 11 from reducing its fluidity due to temperature. At the same time, it can also prevent the light tar in the venting tank 11 from being too hot due to sunlight and ambient temperature in summer, which affects the cooling of the raw gas by the primary cooler 5.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A coke oven gas horizontal pipe cooler cleaning system, comprising a condensate circulation tank (1) and a condensate pump (2), wherein a condensate inlet pipe (3) on the condensate pump (2) is connected to the condensate circulation tank (1), and a condensate outlet pipe (4) on the condensate pump (2) is connected to a spray pipe in a primary cooler (5), characterized in that: The condensate inlet pipe (3) is connected to the ammonia water clarification tank (6) through a light tar pipe (7). The light tar pipe (7) is located at one end of the ammonia water clarification tank (6) and extends to the middle layer of light tar. A control valve (8) is installed on the light tar pipe (7).

2. The coke oven gas horizontal pipe cooler cleaning system according to claim 1, characterized in that: The control valve (8) is a flow valve capable of adjusting the proportion of light tar.

3. The coke oven gas horizontal pipe cooler cleaning system according to claim 1, characterized in that: It also comprises a detarring device (9) and an electric tar collector (10), wherein the tar discharge ports of the detarring device (9) and the electric tar collector (10) are respectively connected to the condensate inlet pipe (3) through pipelines.

4. The coke oven gas horizontal pipe cooler cleaning system according to claim 3, characterized in that: The detarrifier (9) is used to introduce a hot ammonia-water mixture into the electric tar collector (10) through a pipeline.

5. The coke oven gas horizontal pipe cooler cleaning system according to claim 3, characterized in that: The ammonia water clarification tank (6), the tar remover (9) and the electric tar collector (10) are connected to the vent tank (11) through a pipeline. The vent tank (11) is connected to the condensate circulation tank (1) or the condensate inlet pipe (3) through a light tar pump (12). A vacuum pump (13) is installed on the vent tank (11). A three-way air intake valve (14) for one-way air intake is installed at the ends of the pipelines located at the ammonia water clarification tank (6), the tar remover (9) and the electric tar collector (10).

6. The coke oven gas horizontal pipe cooler cleaning system according to claim 5, characterized in that: The drain tank (11) is buried in the underground antifreeze layer.

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