Fan and coal tar tail gas collecting system

Abstract

The utility model belongs to the technical field of chemical equipment, and discloses a fan and a coal tar tail gas collecting system.The fan comprises a fan body and a first shell, and the fan body comprises an air outlet, an air inlet and a shaft seal part; and the first shell is arranged on the shaft seal part, a pressure relief channel is arranged on the first shell, and the other end of the pressure relief channel is connected with the inlet. The first shell is arranged on the plugging part, the pressure relief channel is connected with the first shell and the air inlet, dissipated waste gas is conveyed to the air inlet from the shaft seal through the pressure relief channel, and the problem of waste gas leakage caused by waste gas backflow of the fan body is solved; meanwhile, waste gas entering the bearing oil tank is sucked out by arranging the pressure relief channel, and the problem that oil in the bearing oil tank leaks due to the fact that the waste gas enters the bearing oil tank is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of chemical equipment, concretely relates to fan and coal tar tail gas collection system. BACKGROUND

[0002] Coal tar is an organic mixture mainly composed of polycyclic and heterocyclic compounds, and coal tar processing is an important branch of modern coal chemical industry. Due to the disordered development of the coking industry in recent years, it has brought great pressure to environmental protection and energy. Due to the support of national industrial policy and the increase of coal tar output, coal tar chemical industry has developed rapidly in recent years. The waste gas generated in the process of coal tar chemical industry contains HCl, SOx, HF and other acidic gases in the hot flue gas stream, as well as solid dust and harmful substances such as coal tar, which has an increasingly negative impact on the environment.

[0003] At present, in the prior art, for example, a kind of waste gas treatment device in the processing of coal tar is disclosed in Chinese patent CN113694697B, which specifically discloses an absorption tower body, the bottom end of the absorption tower body is connected with a liquid collecting tank, further comprising a collecting cover and an absorption liquid circulating mechanism, the left side of the absorption tower body is provided with a collecting cover, the collecting cover has a plurality of, each collecting cover includes an outer cover, an inner cover and a partition plate, the lower part of the absorption tower body is provided with an absorption liquid circulating mechanism, the absorption liquid circulating mechanism includes a distribution part and a circulation part, the distribution part includes a baffle, a liquid guide plate, a liquid storage ring and a distribution tank, the circulation part includes a circulation pipe and a chemical pump, the circulation includes a first circulation pipe, a second circulation pipe, a third circulation pipe and a fourth circulation pipe, the chemical pump includes a first chemical pump and a second chemical pump. The present application can use a set of equipment to comprehensively treat the waste gas in the processing of coal tar, reduce the number of treatment equipment, reduce the occupied area, reduce the cost and capital investment.

[0004] In the traditional process, an induced draft fan is added between the collecting cover and the absorption tower, but the induced draft fan is prone to cause the tail gas to enter the bearing box oil and the tail gas to leak due to backflow of the tail gas. SUMMARY

[0005] Therefore, the present application provides a fan and a coal tar tail gas collection system to solve the problem that the induced draft fan is prone to cause the tail gas to enter the bearing box oil and the tail gas to leak due to backflow of the tail gas.

[0006] The technical solution of the present application to solve the above technical problems is as follows:

[0007] A fan includes: a fan body and a first shell, the fan body includes an air outlet, an air inlet and a shaft seal part; the first shell is arranged at the shaft seal part, and a pressure relief channel is arranged on the first shell, and the other end of the pressure relief channel is connected with the air inlet.

[0008] Preferably, a pressure relief interface is arranged on the first shell, the pressure relief interface is located on a side of the first shell away from the ground, and one end of the pressure relief channel is detachably connected to the pressure relief interface.

[0009] Preferably, a first connecting piece is arranged on the pressure relief channel, and the first connecting piece is used for detachably and sealingly connecting the pressure relief interface.

[0010] Preferably, a second shell is further included, the second shell is arranged at the air inlet, and an air inlet interface is arranged on the second shell and detachably connected to one end of the pressure relief channel.

[0011] Preferably, a second connecting piece is arranged on the pressure relief channel, and the second connecting piece is used for detachably and sealingly connecting the air inlet interface.

[0012] Preferably, the second connecting piece includes a lower flange and an upper flange, the lower flange is connected to the air inlet interface, the upper flange is connected to the pressure relief channel through a connecting pipeline, and the upper flange is detachably connected to the lower flange.

[0013] Preferably, the pressure relief channel is a circular pipeline.

[0014] A coal tar tail gas collection system, which applies the fan as claimed in any one of the preceding claims.

[0015] The technical scheme adopted in the application can achieve the following beneficial effects:

[0016] The first shell is arranged at the plugging part, the pressure relief channel connects the first shell and the air inlet, the escaping waste gas is extracted from the shaft seal and transported to the air inlet through the pressure relief channel, and then blown out of the air outlet, thereby solving the problem of waste gas leakage caused by the backflow of waste gas in the fan body; meanwhile, the waste gas entering the bearing oil tank is sucked out through the pressure relief channel, thereby solving the problem of oil leakage in the bearing oil tank caused by the waste gas entering the bearing oil tank. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole schematic view of the fan of the application.

[0018] Figure 2 It is a side view of the fan of the application. Figure One .

[0019] Figure 3 It is a side view of the fan of the application. Figure Two .

[0020] In the figure: fan body 100, air inlet 200, second shell 210, air inlet interface 211, second connecting piece 212, upper flange 213, lower flange 214, air outlet 300, shaft seal part 400, first shell 410, pressure relief interface 411, first connecting piece 412, pressure relief channel 500, bearing oil tank 600. DETAILED DESCRIPTION

[0021] For the purpose of promoting an understanding of the application, the application will be described in greater detail below with reference to the drawings. The preferred embodiments of the application are illustrated in the drawings. However, the application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the application to those skilled in the art.

[0022] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right", "top", "bottom", "bottom end", "top end", and the like as used herein are used for explanation only and not to limit the present application.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0024] Referring to Figures 1 to 3 The application provides a fan, comprising: a fan body 100, the fan body 100 comprising an air outlet 300, an air inlet 200 and a shaft seal part 400; a first shell 410, the first shell 410 being arranged on the shaft seal part 400, the first shell 410 being provided with a pressure relief channel 500, the other end of the pressure relief channel 500 being connected to the air inlet 200.

[0025] Specifically, the fan in the chemical plant is used for waste gas exhaust, and high-pressure fan is used. The fan body 100 is a large fan commonly used in the chemical industry, which includes an impeller, a bearing, a bearing oil tank 600, a pump body, an air inlet 200 and an air outlet 300; the first shell 410 is a sealed pipeline such as a cylindrical steel pipe and a square channel, but is not limited to; the first shell 410 is arranged on the shaft seal part 400 of the bearing, and the other end of the first shell 410 is connected to the bearing oil tank 600; the side (upper part) of the first shell 410 away from the ground is connected to one end of the pressure relief channel 500, and the other end of the pressure relief channel 500 is connected to the air inlet 200. When the fan body 100 works, the waste gas enters the fan body 100 from the air inlet 200 of the fan body 100 under the rotation of the impeller, and is compressed and rotated at high speed. When the waste gas is compressed and rotated at high speed, part of the waste gas escapes from the bearing into the first shell 410 due to high pressure. The part of the waste gas enters the first shell 410 and enters the air inlet 200 of the fan body 100 along the pressure relief channel 500 to be transported again (since the air inlet 200 of the fan body 100 is in a state of air pressure difference under the rotation of the impeller, the part of the waste gas will be sucked to flow along the pressure relief channel 500).

[0026] The technical scheme of the fan can achieve the following beneficial effects:

[0027] The first shell 410 is arranged at the plugging part, the pressure relief channel 500 connects the first shell 410 and the air inlet 200, and the waste gas escaping from the shaft seal part is transported to the air inlet 200 through the pressure relief channel 500, so that the problem of waste gas leakage caused by waste gas backflow of the fan body 100 is solved; at the same time, the waste gas entering the bearing oil tank is sucked out through the pressure relief channel 500, so that the problem of oil leakage in the bearing oil tank caused by the waste gas entering the bearing oil tank is solved.

[0028] Based on the above scheme, in order to facilitate maintenance and installation, the first shell 410 is provided with a pressure relief interface 411, the pressure relief interface 411 is located on the side of the first shell 410 away from the ground, and one end of the pressure relief channel 500 is detachably connected to the pressure relief interface 411. The pressure relief interface 411 with the same size as the pressure relief channel 500 is arranged on the side of the first shell 410 away from the ground, the pressure relief interface 411 is a circular pipe or a square pipe, but is not limited to; the pressure relief interface 411 is arranged on the upper part of the first shell 410, the waste gas in the fan body 100 escapes from the bearing, then enters the first shell 410, and then the waste gas enters the pressure relief interface 411. The pressure relief interface 411 is detachably connected to the pressure relief channel 500, when the pressure relief channel 500 needs to be repaired and replaced after a long time of work, the pressure relief channel 500 is detached from the pressure relief interface 411; after replacement, the work can continue; the pressure relief interface 411 solves the problem of difficult maintenance of the pressure relief channel 500; and the pressure relief interface 411 solves the problem of difficult sealing of the pressure relief channel 500 and the first shell 410.

[0029] In the above scheme, in order to make the disassembly more convenient, the pressure relief channel 500 is provided with a first connecting piece 412, which is used for detachable and sealed connection of the pressure relief interface 411. The first connecting piece 412 adopts, but is not limited to, a detachable and sealed connecting device such as a nut and bolt, a flange, etc. For example, the pressure relief interface 411 is provided with an external thread at an end away from the first shell 410, the first connecting piece 412 is a nut, and the nut matches the external thread of the pressure relief interface 411. One end of the pressure relief channel 500 is aligned with the pressure relief interface 411, and a sealing gasket is arranged between the pressure relief interface 411 and the pressure relief channel 500. Then, the detachable connection of the pressure relief channel 500 and the pressure relief interface 411 is completed by rotating the first connecting piece 412 (the nut), which is simple and convenient to operate.

[0030] In an embodiment of the present application, a second shell 210 is further included, which is arranged at the air inlet 200, and the second shell 210 is provided with an air inlet interface 211, which is detachably connected to one end of the pressure relief channel 500. The pressure relief channel 500 is provided with a second connecting piece 212, which is used for detachable and sealed connection of the air inlet interface 211.

[0031] The second shell 210 is arranged at the air inlet 200 and is sealedly connected to the fan body 100. The air inlet interface 211 is arranged at the upper part of the second shell 210, and the air inlet interface 211 uses an interface of the same size and material as the pressure relief interface 411. The second connecting piece 212 can also be the same as the first connecting piece 412. By arranging the second shell 210, the problem of difficult sealing connection of the pressure relief channel 500 and the air inlet 200 of the fan body 100 is solved. By arranging the air inlet interface 211, the problem of difficult sealing of the pressure relief channel 500 and the second shell 210 is solved. By arranging the second connecting piece 212, the problem of difficult disassembly of the pressure relief channel 500 and the air inlet interface 211 is solved.

[0032] Further, the second connecting piece 212 includes a lower flange 214 and an upper flange 213. The lower flange 214 is connected to the air inlet interface 211. The upper flange 213 is connected to the pressure relief channel 500 through a connecting pipe. The upper flange 213 and the lower flange 214 are detachably connected.

[0033] Compared with the first connecting piece 412, the second connecting piece 212 is preferably a flange connection. The lower flange 214 is sealedly and fixedly connected to the air inlet interface 211, and the upper flange 213 is sealedly and fixedly connected to the pressure relief channel 500. The upper flange 213 and the lower flange 214 are connected by a bolt. By using the connection mode of the upper flange 213 and the lower flange 214, the problem of waste gas escaping at the connection is solved, the sealing effect is improved, and the connection is more convenient.

[0034] In the above scheme, in order to facilitate connection and reduce the retention of exhaust gas in the pressure relief channel 500, the pressure relief channel 500 is a circular pipe; the inner wall of the circular pipe is smooth and has no joint, which solves the problem that the exhaust gas escapes from the welded part of the pressure relief channel 500 after entering the pressure relief channel 500; and the circular pipe is preferably a hose, by setting the hose, reducing the inflection point of the pressure relief channel 500, solving the problem that the exhaust gas impacts the pressure relief channel 500, causing the impurities in the exhaust gas to adhere to the inflection point of the pressure relief channel 500, and at the same time solving the problem that the impurities in the exhaust gas react with the pressure relief channel 500, causing the pressure relief channel 500 to be damaged, thereby improving the service life of the pressure relief pipe.

[0035] A coal tar tail gas collection system using the fan as claimed in any one of the preceding claims.

[0036] The above examples only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the patent application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application should be subject to the appended claims.

Claims

1. A fan, characterized by, The fan body comprises an air outlet, an air inlet and a shaft seal part; A first shell is arranged on the shaft seal part, and a pressure relief channel is arranged on the first shell, with the other end of the pressure relief channel being connected to the air inlet. A pressure relief interface is arranged on the first shell, and the pressure relief interface is located on the side of the first shell away from the ground, with one end of the pressure relief channel being detachably connected to the pressure relief interface.

2. The fan of claim 1, wherein A first connecting piece is arranged on the pressure relief channel, and the first connecting piece is used for detachably and sealingly connecting the pressure relief interface.

3. The fan of claim 2, wherein A second shell is further arranged on the air inlet, and an air inlet interface is arranged on the second shell, with one end of the pressure relief channel being detachably connected to the air inlet interface.

4. The fan of claim 1, wherein A second connecting piece is arranged on the pressure relief channel, and the second connecting piece is used for detachably and sealingly connecting the air inlet interface.

5. The fan of claim 4, wherein The second connecting piece comprises a lower flange and an upper flange, the lower flange is connected to the air inlet interface, the upper flange is connected to the pressure relief channel through a connecting pipeline, and the upper flange is detachably connected to the lower flange.

6. The fan of claim 5, wherein, The pressure relief channel is a circular pipeline.

7. The fan of claim 1, wherein The fan as claimed in any one of claims 1-7 is applied.

8. A coal tar off-gas collection system characterized by, ​

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