Gas primary cooler with unblocking function

Abstract

The utility model provides a coal gas primary cooler with a blockage clearing function, and relates to the technical field of coal gas primary coolers, the coal gas primary cooler comprises a coal gas primary cooler body and a washing oil circulating reflux tank used for storing washing oil, a first pipeline is arranged between the coal gas primary cooler body and the liquid outlet end of the washing oil circulating reflux tank, and a second pipeline is arranged between the coal gas primary cooler body and the washing oil circulating reflux tank; a second pipeline is arranged between the gas primary cooler body and the liquid inlet end of the washing oil circulating reflux tank, a cooling water inlet and a cooling water outlet are formed in the gas primary cooler body, and the cooling water outlet can be connected with an external steam pipeline so as to introduce steam to heat washing oil in the gas primary cooler body; according to the coal gas primary cooler, washing oil is matched with steam to dissolve and unblock a solid mixture, the dissolving and separating effect is good, the resistance of the coal gas primary cooler body can be recovered to the normal condition about one hour, and the unblocking efficiency is high.

Description

Technical Field

[0001] The present application relates to the technical field of coal gas primary coolers, and in particular to a coal gas primary cooler with a blockage clearing function. Background Art

[0002] The coal gas primary cooler is a device used to cool hot gas and can be used for pre-cooling of raw coal gas produced by coke ovens. Since the coal cakes in the top space of the coke oven are not compacted after coal is loaded, there is a lot of floating coal (i.e. pulverized coal). Under the action of the negative pressure of the intake pipe, the mixture of pulverized coal and coal gas, coal powder, tar, crude naphthalene, etc. in the raw coal gas enters the coal gas primary cooler along the intake pipe, and the mixture easily blocks the coal gas primary cooler, causing the resistance of the coal gas primary cooler to become greater and greater, and finally causing the raw coal gas produced by the coke oven to be unable to enter the coal gas primary cooler for cooling, affecting the normal production of the coke oven. At present, the coal gas primary cooler is cleared by introducing steam and residual ammonia water, which takes a long time and affects the normal production of the coke oven. The coal gas primary cooler is cleared by manually spraying high-pressure water, but only part of the coal gas primary cooler can be cleared, and a comprehensive cleaning cannot be performed, resulting in poor clearing effect. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a gas pre-cooler with a clearing function, which can solve the technical problem that the current method of clearing the gas pre-cooler by introducing steam and residual ammonia water takes a long time and affects the normal production of the coke oven, while the method of manually spraying high-pressure water to clear the gas pre-cooler can only clear part of the gas pre-cooler and cannot perform comprehensive cleaning, resulting in poor clearing effect.

[0004] An embodiment of the present application provides a gas pre-cooler with a blockage clearing function, comprising a gas pre-cooler body and an oil washing circulation reflux groove for storing washing oil, a first pipe is arranged between the gas pre-cooler body and the liquid outlet end of the oil washing circulation reflux groove, and a second pipe is arranged between the gas pre-cooler body and the liquid inlet end of the oil washing circulation reflux groove, a cooling water inlet and a cooling water outlet are arranged on the gas pre-cooler body, and the cooling water outlet can be connected to an external steam pipe to allow steam to pass through to heat the washing oil in the gas pre-cooler body.

[0005] Wherein, a circulation pump is arranged on the first pipeline.

[0006] Wherein, a wash oil inlet and a wash oil outlet are arranged on the main body of the coal gas primary cooler, the first pipeline is connected to the wash oil inlet, and the second pipeline is connected to the wash oil outlet.

[0007] Wherein, a gas inlet and a gas outlet are arranged on the main body of the gas pre-cooler, and the gas outlet is connected to an external blower.

[0008] Wherein, a spraying mechanism is arranged in the main body of the coal gas primary cooler, and the spraying mechanism is connected to the washing oil inlet.

[0009] Wherein, a heat exchange tube is arranged in the main body of the coal gas primary cooler, and two ends of the heat exchange tube are respectively connected to the cooling water inlet and the cooling water outlet.

[0010] The volume of the oil washing circulation reflux tank is not less than 20m 3 .

[0011] Beneficial effects of the utility model:

[0012] 1. The utility model provides a gas pre-cooler with a blockage clearing function. When the gas pre-cooler body is in normal use, cooling water enters the heat exchange pipe inside the gas pre-cooler body from the cooling water inlet and is then discharged from the cooling water outlet. When the raw gas flows through the gas pre-cooler body, it exchanges heat with the cooling water to achieve cooling and cooling. When the gas pre-cooler body is cleared, the washing oil stored in the washing oil circulation reflux tank flows into the gas pre-cooler body through the first pipeline for spraying. After 10 minutes, the cooling water outlet is connected to the outside. The gas pre-cooler is connected to a steam pipeline, and low-pressure steam is introduced into the heat exchange pipe inside the gas pre-cooler body to heat the wash oil in the gas pre-cooler body. After the solid mixture in the gas pre-cooler body is dissolved and softened by the wash oil, it flows back to the wash oil circulation reflux tank through the second pipeline together with the wash oil until the blockage removal work is completed. The gas pre-cooler dissolves and removes the solid mixture by using wash oil and steam, and has a good dissolution and separation effect. The resistance of the gas pre-cooler body can be restored to a normal state in about 1 hour, and the blockage removal efficiency is high.

[0013] 2. The temperature of low-pressure steam is generally around 150°C. The washing oil is sprayed for 10 minutes before the steam is introduced. The steam is introduced from the cooling water outlet located at the top, and first exchanges heat with the washing oil sprayed from top to bottom to increase the washing oil temperature and reduce the steam temperature, and then is discharged from the cooling water inlet located at the bottom; the washing oil is sprayed for 10 minutes before the steam is introduced, so that the washing oil flows in all parts of the gas primary cooler body to absorb the steam temperature, which can not only make the washing oil reach the temperature to dissolve and soften the mixture, but also prevent the rubber sealing gasket of the gas primary cooler body from being damaged due to excessively high steam temperature; the steam is introduced from the cooling water outlet located at the top, which can reduce the steam temperature as soon as possible and accelerate the increase of the washing oil temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the overall structure in some embodiments of the present application.

[0016] The reference numerals are:

[0017] 1. Gas primary cooler body; 11. Cooling water inlet; 12. Cooling water outlet; 13. Washing oil inlet; 14. Washing oil outlet; 15. Gas inlet; 16. Gas outlet;

[0018] 2. Wash oil circulation reflux tank;

[0019] 3. First pipeline; 31. Circulation pump;

[0020] 4. Second pipeline;

[0021] 5. Blower. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] like Figure 1 As shown, an embodiment of the present application provides a gas pre-cooler with a blockage clearing function, comprising a gas pre-cooler body 1 and an oil washing circulation reflux groove 2 for storing washing oil, a first pipe 3 is arranged between the gas pre-cooler body 1 and the liquid outlet end of the oil washing circulation reflux groove 2, and a second pipe 4 is arranged between the gas pre-cooler body 1 and the liquid inlet end of the oil washing circulation reflux groove 2, a cooling water inlet 11 and a cooling water outlet 12 are arranged on the gas pre-cooler body 1, and the cooling water outlet 12 can be connected to an external steam pipe to pass steam to heat the washing oil in the gas pre-cooler body 1.

[0029] When the gas primary cooler body 1 is in normal use, cooling water enters the heat exchange tube inside the gas primary cooler body 1 from the cooling water inlet 11, and then is discharged from the cooling water outlet 12. When the raw gas flows through the gas primary cooler body 1, it exchanges heat with the cooling water to achieve cooling. When the gas primary cooler body 1 is unblocked, the washing oil stored in the washing oil circulation reflux tank 2 flows into the gas primary cooler body 1 through the first pipeline 3 for spraying. After 10 minutes, the cooling water outlet 12 is connected to the external steam pipeline. Low-pressure steam is introduced into the heat exchange pipe inside the gas pre-cooler body 1 to heat the washing oil in the gas pre-cooler body 1. After the solid mixture in the gas pre-cooler body 1 is dissolved and softened by the washing oil, it flows back to the washing oil circulation reflux tank 2 through the second pipe 4 together with the washing oil until the blockage removal work is completed. The gas pre-cooler dissolves and removes the solid mixture by using washing oil and steam, and the dissolution and separation effect is good. The resistance of the gas pre-cooler body 1 can be restored to normal in about 1 hour, and the blockage removal efficiency is high.

[0030] The temperature of low-pressure steam is generally around 150°C. The washing oil is sprayed for 10 minutes before the steam is introduced. The steam is introduced from the cooling water outlet 12 located at the top, and first exchanges heat with the washing oil sprayed from top to bottom to increase the washing oil temperature and reduce the steam temperature, and then is discharged from the cooling water inlet 11 located at the bottom; the washing oil is sprayed for 10 minutes before the steam is introduced, so that the washing oil flows in various parts of the gas primary cooler body 1 to absorb the steam temperature, which can not only make the washing oil reach the temperature to dissolve and soften the mixture, but also prevent the rubber sealing gasket of the gas primary cooler body 1 from being damaged due to excessively high steam temperature; the steam is introduced from the cooling water outlet 12 located at the top, which can reduce the steam temperature as soon as possible and accelerate the increase of the washing oil temperature.

[0031] The selection experiment of the solvent and the temperature used for clearing blockage is as follows:

[0032] Since many sealing gaskets in the gas pre-cooler body 1 are made of rubber material, the solvent operating temperature cannot be too high. The maximum heating temperature is set to 50°C. Two beakers are used to hold two different solvents respectively. A small piece of the mixture that causes the gas pre-cooler body 1 to be blocked is put into the beaker, and heated in a heating furnace to observe the dissolution of the mixture.

[0033] Table 1 below is a table showing the dissolution of the mixture in different solvents and at different temperatures.

[0034] Table 1

[0035]

[0036] It can be seen from Table 1 above that the mixture has the best dissolution and separation effect in washing oil at 50°C. When the washing oil temperature reaches 50°C, the tar and crude naphthalene in the mixture can be effectively dissolved, so that the mixture of coal powder, tar, crude naphthalene, etc. can be effectively separated. The mixture has a certain fluidity after softening, which is convenient for clearing blockages. Therefore, washing oil is used in combination with steam to dissolve and clear blockages of the solid mixture.

[0037] like Figure 1 As shown, in this embodiment, a circulation pump 31 is provided on the first pipe 3; when the gas primary cooler body 1 is unblocked, the circulation pump 31 is turned on to allow the wash oil stored in the wash oil circulation reflux tank 2 to flow into the gas primary cooler body 1 through the first pipe 3 for spraying.

[0038] like Figure 1As shown, in this embodiment, a wash oil inlet 13 and a wash oil outlet 14 are provided on the gas pre-cooler body 1, the first pipe 3 is connected to the wash oil inlet 13, and the second pipe 4 is connected to the wash oil outlet 14; when the gas pre-cooler body 1 is unblocked, the circulation pump 31 is turned on to flow the wash oil stored in the wash oil circulation reflux tank 2 from the wash oil inlet 13 through the first pipe 3 into the gas pre-cooler body 1 for spraying, and after the solid mixture in the gas pre-cooler body 1 is dissolved and softened by the wash oil, it flows back to the wash oil circulation reflux tank 2 from the wash oil outlet 14 through the second pipe 4 together with the wash oil until the unblocking work is completed.

[0039] like Figure 1 As shown, in this embodiment, a gas inlet 15 and a gas outlet 16 are provided on the gas primary cooler body 1, and the gas outlet 16 is connected to the external blower 5; when the gas primary cooler body 1 is in normal use, raw gas enters the gas primary cooler body 1 from the gas inlet 15, and the raw gas exchanges heat with the cooling water when flowing through the gas primary cooler body 1 to achieve cooling and then is discharged from the gas outlet 16 and sent to the next process under the action of the external blower 5.

[0040] In this embodiment, a spraying mechanism is provided in the gas pre-cooler body 1, and the spraying mechanism is connected to the washing oil inlet 13; when the gas pre-cooler body 1 is unblocked, the circulation pump 31 is turned on to flow the washing oil stored in the washing oil circulation reflux tank 2 into the gas pre-cooler body 1 from the washing oil inlet 13 through the first pipe 3 for spraying, so that the washing oil can flow quickly and fill various parts of the gas pre-cooler body 1.

[0041] In this embodiment, a heat exchange tube is provided in the gas pre-cooler body 1, and both ends of the heat exchange tube are respectively connected to the cooling water inlet 11 and the cooling water outlet 12; when the gas pre-cooler body 1 is in normal use, cooling water enters the heat exchange tube inside the gas pre-cooler body 1 from the cooling water inlet 11, and then is discharged from the cooling water outlet 12; when the gas pre-cooler body 1 is unblocked, the cooling water outlet 12 is connected to the external steam pipeline, and low-pressure steam is introduced into the heat exchange tube inside the gas pre-cooler body 1 to heat the washing oil in the gas pre-cooler body 1.

[0042] In this embodiment, the volume of the wash oil circulation reflux tank is not less than 20m 3 .

[0043] Working principle: When the gas pre-cooler with a clearing function provided by the present application is in use, when the gas pre-cooler body 1 is in normal use, cooling water enters the heat exchange tube inside the gas pre-cooler body 1 from the cooling water inlet 11, and is then discharged from the cooling water outlet 12, and raw gas enters the gas pre-cooler body 1 from the gas inlet 15. When the raw gas flows through the gas pre-cooler body 1, it exchanges heat with the cooling water to achieve cooling and cooling, and is then discharged from the gas outlet 16 and sent to the next process under the action of the external blower 5; when the gas pre-cooler body 1 is cleared, , start the circulation pump 31 to let the washing oil stored in the washing oil circulation reflux tank 2 flow into the gas pre-cooler body 1 from the washing oil inlet 13 through the first pipe 3 for spraying. After 10 minutes, connect the cooling water outlet 12 with the external steam pipe, and introduce low-pressure steam into the heat exchange pipe inside the gas pre-cooler body 1 to heat the washing oil in the gas pre-cooler body 1. After the solid mixture in the gas pre-cooler body 1 is dissolved and softened by the washing oil, it flows back to the washing oil circulation reflux tank 2 from the washing oil outlet 14 through the second pipe 4 together with the washing oil until the blockage clearing work is completed.

[0044] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A gas primary cooler with a blockage clearing function, characterized in that: The invention comprises a coal gas pre-cooler body (1) and a washing oil circulation reflux groove (2) for storing washing oil, wherein a first pipe (3) is arranged between the coal gas pre-cooler body (1) and the liquid outlet end of the washing oil circulation reflux groove (2), and a second pipe (4) is arranged between the coal gas pre-cooler body (1) and the liquid inlet end of the washing oil circulation reflux groove (2), and a cooling water inlet (11) and a cooling water outlet (12) are arranged on the coal gas pre-cooler body (1), and the cooling water outlet (12) can be connected to an external steam pipe to allow steam to enter and heat the washing oil in the coal gas pre-cooler body (1).

2. The gas primary cooler with blockage clearing function according to claim 1, characterized in that: A circulation pump (31) is provided on the first pipeline (3).

3. The gas primary cooler with blockage clearing function according to claim 1, characterized in that: The coal gas primary cooler body (1) is provided with a wash oil inlet (13) and a wash oil outlet (14); the first pipeline (3) is connected to the wash oil inlet (13), and the second pipeline (4) is connected to the wash oil outlet (14).

4. The gas primary cooler with blockage clearing function according to claim 1, characterized in that: The coal gas pre-cooler body (1) is provided with a coal gas inlet (15) and a coal gas outlet (16), and the coal gas outlet (16) is connected to an external blower (5).

5. The gas primary cooler with blockage clearing function according to claim 3, characterized in that: A spray mechanism is provided in the coal gas primary cooler body (1), and the spray mechanism is connected to the wash oil inlet (13).

6. The gas primary cooler with blockage clearing function according to claim 1, characterized in that: A heat exchange tube is arranged in the coal gas primary cooler body (1), and two ends of the heat exchange tube are respectively connected to the cooling water inlet (11) and the cooling water outlet (12).

7. The gas primary cooler with blockage clearing function according to claim 1, characterized in that: The volume of the wash oil circulation reflux tank (2) is not less than 20m 3 .

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