A fuel gas pipeline liquid collection bag drainage system and coal powder gasification and pulverization system

Abstract

The utility model provides a fuel gas pipeline liquid collecting bag drainage system and a pulverized coal gasification and pulverizing coal system, the fuel gas pipeline liquid collecting bag drainage system, including: a gas pipeline body, the gas pipeline body is arranged horizontally to transport fuel gas; a liquid collecting bag, the top of the liquid collecting bag is connected to the gas pipeline body; a liquid level monitoring unit, the liquid level monitoring unit is installed on one side of the liquid collecting bag; and a flare liquid separating tank device, the flare liquid separating tank device includes a flare liquid separating tank and a control valve assembly, the lower end of the liquid collecting bag is connected to the flare liquid separating tank through the control valve assembly; wherein the medium pressure of the fuel gas in the gas pipeline body is greater than the back pressure of the flare liquid separating tank. The utility model can deliver the condensate in the fuel gas from the gas pipeline body to the flare liquid separating tank by means of pressure difference, and can also realize the liquid level monitoring of the liquid collecting bag, and when the liquid level in the liquid collecting bag is lower than the preset threshold value, automatically control to stop the delivery to the flare liquid separating tank, so as to solve the risk of high pressure piercing low pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of pulverized coal gasification, in particular to a liquid collection bag drainage system for a fuel gas pipeline and a pulverized coal gasification and coal grinding system. Background Art

[0002] The fuel gas of the coal grinding system of the pulverized coal gasification unit comes from the analytical gas and methane-rich gas of the methanation unit, and the fuel gas contains liquid. During the startup or operation of the coal grinding system, the fuel gas contains liquid frequently, which causes the inert gas generator to fail to ignite and start, affecting the normal operation of the coal grinding system. At the same time, the fuel gas containing liquid will also cause the fuel gas calorific value analyzer to fail to be put into use normally. When the coal grinding system fails to start seriously, it may even cause the gasifier to fail to supply pulverized coal normally, and the gasifier is forced to reduce the load, affecting the stable operation of the gasifier. Utility Model Content

[0003] In view of the shortcomings of the prior art mentioned above, the purpose of the utility model is to provide a fuel gas pipeline liquid collecting bag drainage system and a pulverized coal gasification and pulverizing system, which are used to solve the problem in the prior art that the fuel gas in the pulverized coal gasification and pulverizing system carries liquid, causing the inert gas generator of the pulverizing system to be unable to ignite and start, and the fuel gas calorific value analyzer to be unable to be put into normal use.

[0004] To achieve the above-mentioned purpose and other related purposes, the utility model provides a fuel gas pipeline liquid collecting bag drainage system, comprising: a gas pipeline body, which is arranged horizontally to transport fuel gas; a liquid collecting bag, the top of which is connected to the gas pipeline body; a liquid level monitoring unit, which is installed on one side of the liquid collecting bag to detect the liquid level data in the liquid collecting bag; and a flare liquid separating tank device, which comprises a flare liquid separating tank and a control valve assembly, the lower end of the liquid collecting bag is connected to the flare liquid separating tank through the control valve assembly, and the control valve assembly is electrically connected to the liquid level monitoring unit to control the connection between the liquid collecting bag and the flare liquid separating tank; wherein the medium pressure of the fuel gas in the gas pipeline body is greater than the back pressure of the flare liquid separating tank.

[0005] In one embodiment of the present invention, the liquid level monitoring unit includes: a liquid level detector, which is connected to the liquid collecting bag to detect the liquid level alarm signal of the liquid collecting bag; and a signal transmitter, which is connected to the liquid level detector to transmit the liquid level alarm signal to a remote end.

[0006] In an embodiment of the present invention, the liquid level alarm signal includes a high liquid level alarm signal and a low liquid level alarm signal.

[0007] In one embodiment of the present invention, the lowest liquid level in the liquid collecting bag is 100 mm, the highest liquid level is 480 mm, the high liquid level corresponding to the high liquid level alarm signal is 450 mm, and the low liquid level corresponding to the low liquid level alarm signal is 150 mm.

[0008] In one embodiment of the present invention, the liquid level detector is a local liquid level gauge, and the signal transmitter is a remote liquid level gauge.

[0009] In one embodiment of the utility model, the liquid level detector includes: a detection body; an upper pipeline, one end of the upper pipeline is connected to the detection body, the other end of the upper pipeline is connected to the high liquid level corresponding position and the highest liquid level corresponding position on the liquid collecting bag, and an upper hand valve is installed on the upper pipeline; and a lower pipeline, one end of the lower pipeline is connected to the detection body, the other end of the lower pipeline is connected to the low liquid level corresponding position and the lowest liquid level corresponding position on the liquid collecting bag, and a lower hand valve is installed on the lower pipeline.

[0010] In one embodiment of the utility model, the control valve assembly includes: a front hand valve, the input end of the front hand valve is connected to the bottom of the liquid collecting bag; a cut-off valve, the input end of the cut-off valve is connected to the output end of the front hand valve; a rear hand valve, the input end of the rear hand valve is connected to the output end of the cut-off valve, and the output end of the rear hand valve is connected to the top side of the flare liquid separation tank; and a shower valve, the shower valve is installed between the cut-off valve and the rear hand valve; wherein, when the liquid level detector detects that the liquid level height reaches the lowest liquid level, the cut-off valve is controlled to close the connection between the liquid collecting bag and the flare liquid separation tank; when the liquid level detector detects that the liquid level height reaches the highest liquid level, the cut-off valve is controlled to open to connect the liquid collecting bag and the flare liquid separation tank.

[0011] In one embodiment of the utility model, the input end of the rear hand valve is provided with an isolation blind plate connected to the output end of the cut-off valve, and a root hand valve is also provided between the flare liquid separation tank and the output end of the rear hand valve.

[0012] In one embodiment of the present invention, the fuel gas medium pressure of the gas pipeline body is 0.5 MPa, and the back pressure of the flare separation tank is 0.1 MPa.

[0013] The utility model also provides a pulverized coal gasification and pulverizing system, comprising the above-mentioned fuel gas pipeline liquid collecting bag drainage system.

[0014] Beneficial effects of the utility model: The utility model proposes a fuel gas pipeline liquid collection bag drainage system and a pulverized coal gasification and pulverized coal grinding system. The drainage system and the pulverized coal gasification and pulverized coal grinding system not only realize the collection of condensate in the liquid-carrying fuel gas, but also realize the use of negative pressure to transport the fuel gas condensate when transporting it, thereby realizing the transportation to the flare liquid separation tank not by its own gravity. The liquid level of the liquid collection bag is monitored by the liquid level monitoring unit, and the liquid level alarm is realized when the liquid level is high or low according to the minimum liquid level, maximum liquid level, high liquid level and low liquid level set in the liquid collection bag. And when the liquid level is at the lowest liquid level, the shut-off valve is closed in time to prevent the liquid level of the liquid collection bag from being too low and causing the fuel gas to enter the flare system. The minimum liquid level interlock is set to close the shut-off valve, so that the accident state of the shut-off valve is accident closed. In addition, the cut-off valve group is provided with front and rear manual valves and a drain drain valve. At the same time, the addition of an isolation blind plate can facilitate the isolation of the fuel gas system, and a root manual valve is provided before entering the flare separator tank to enable timely control of the cut-off. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the liquid collecting bag drainage system of the utility model.

[0016] Figure 2 It is a structural schematic diagram of the connection between the liquid collecting bag and the liquid level monitoring unit in a preferred embodiment of the utility model.

[0017] Component number description

[0018] Gas pipeline body 1; liquid collecting bag 2; liquid level monitoring unit 3; torch liquid separation tank device 4; liquid level detector 31; signal transmitter 32; detection body 311; upper pipeline 312; upper hand valve 313; lower pipeline 314; lower hand valve 315; torch liquid separation tank 41; control valve assembly 42; front hand valve 421; cut-off valve 422; rear hand valve 423; drainage valve 424; isolation blind plate 425; root hand valve 426. DETAILED DESCRIPTION

[0019] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0020] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0021] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present invention difficult to understand.

[0022] See also Figure 1 The utility model provides a fuel gas pipeline liquid collecting bag drainage system, comprising: a gas pipeline body 1, which is arranged horizontally to transport fuel gas; a liquid collecting bag 2, the top of which is connected to the gas pipeline body 1; a liquid level monitoring unit 3, which is installed on one side of the liquid collecting bag 2 to detect the liquid level data in the liquid collecting bag 2; and a flare liquid separating tank device 4, which comprises a flare liquid separating tank 41 and a control valve assembly 42, the lower end of the liquid collecting bag 2 is connected to the flare liquid separating tank 41 through the control valve assembly 42, and the control valve assembly 42 is electrically connected to the liquid level monitoring unit 3 to control the connection between the liquid collecting bag 2 and the flare liquid separating tank 41; wherein, the medium pressure of the fuel gas in the gas pipeline body 1 is greater than the back pressure of the flare liquid separating tank 41.

[0023] It is not difficult to find from the above content that in the pulverized coal gasification and coal grinding system, when the fuel gas pipeline is processed with liquid fuel gas, the fuel gas is transported through the gas pipeline body 1, and the condensate in the liquid fuel gas is collected through the liquid collecting bag 2. When the condensate is collected in the liquid collecting bag 2, the liquid level in the liquid collecting bag 2 is monitored by the liquid level monitoring unit 3. And when the liquid level monitoring unit 3 detects that the liquid level data exceeds the preset requirements, it will control the alarm. And according to the liquid level data, the control valve assembly 42 is further controlled to achieve the connection or disconnection between the liquid collecting bag 2 and the flare liquid separation tank 41. Moreover, by designing the medium pressure of the gas pipeline body 1 to be greater than the back pressure of the flare liquid separation tank 41, it can be realized that during the coalification pulverized coal gasification process, when the condensate of the fuel gas in the coal grinding system is collected, the fuel gas condensate is transported through the liquid collecting bag 2 toward the flare liquid separation tank 41, and the transportation is completed by the negative pressure. And because there is a pressure difference between the gas pipeline body 1 and the flare liquid separation tank 41, there is a risk of high pressure piercing low pressure. Therefore, by monitoring the liquid level signal through the liquid level monitoring unit 3 and controlling the connection between the liquid collecting bag 2 and the flare liquid separation tank 41 through the control valve assembly 42, it is possible to effectively prevent high-to-low flow and ensure that the system is in a safe state. Specifically, back pressure refers to the pressure at the rear end of the flare liquid separation tank 41, that is, the pressure in the opposite direction of the movement of the condensate fluid applied to the flare liquid separation tank 41 when the condensate fluid flows along its path (i.e., pipeline) due to obstacles or sharp turns.

[0024] like Figure 2 As shown, the liquid level monitoring unit 3 includes: a liquid level detector 31, which is connected to the liquid collecting bag 2 to detect the liquid level alarm signal of the liquid collecting bag 2; and a signal transmitter 32, which is connected to the liquid level detector 31 to transmit the liquid level alarm signal to a remote end.

[0025] In one embodiment of the utility model, during the liquid level detection process of the liquid collecting bag 2, the liquid level monitoring unit 3 can collect the liquid level information of the liquid collecting bag 2 by using the liquid level detector 31 to communicate with the liquid collecting bag 2, and then detect the liquid level alarm signal when the liquid level information exceeds the preset value. And after obtaining the liquid level alarm signal, the liquid level information is sent to the remote end through the signal transmitter 32. Specifically, the remote end can be a monitoring terminal connected by a signal, so that it is convenient to remind the operator to monitor and adjust in time. Of course, the remote end can also be, for example, a mobile device of the operator.

[0026] Specifically, the liquid level alarm signal includes a high liquid level alarm signal and a low liquid level alarm signal.

[0027] In one embodiment of the utility model, by setting a high liquid level alarm signal, a control alarm can be performed when the liquid level is detected to be higher than a preset value. By setting a low liquid level alarm signal, a control alarm can also be performed when the liquid level is detected to be lower than another preset value.

[0028] Preferably, the lowest liquid level in the liquid collecting bag 2 is 100 mm, the highest liquid level is 480 mm, the high liquid level corresponding to the high liquid level alarm signal is 450 mm, and the low liquid level corresponding to the low liquid level alarm signal is 150 mm.

[0029] In one embodiment of the utility model, when the high liquid level alarm is performed, when the liquid level reaches a high liquid level of 450 mm to a maximum liquid level of 480 mm, the operator will monitor the liquid level. And when the liquid level is higher than the maximum liquid level of 480 mm, the operator promptly opens the control valve assembly 42 to discharge the condensate into the flare liquid separation tank 41. When the liquid level is between the low liquid level of 150 mm and the minimum liquid level of 100 mm, the connection between the liquid collection bag 2 and the flare liquid separation tank 41 is closed to prevent the operator from failing to adjust the liquid level in time when the liquid level is at the minimum liquid level of 100 mm, thereby causing the high pressure between the gas pipeline body 1 and the flare liquid separation tank 41 to flow into the low pressure. Therefore, by setting the value of the minimum liquid level of 100 mm, the control valve assembly 42 can be interlocked and closed, so that the liquid level meets the requirements of the safe liquid level, and the entire drainage system is in a safe state.

[0030] Furthermore, the liquid level detector 31 is a local liquid level meter, and the signal transmitter 32 is a remote liquid level meter.

[0031] The liquid level detector 31 includes: a detection body 311; an upper pipeline 312, one end of which is connected to the detection body 311, and the other end of the upper pipeline 312 is connected to a position corresponding to a high liquid level and a position corresponding to a maximum liquid level on the liquid collecting bag 2, and an upper valve 313 is installed on the upper pipeline 312; and a lower pipeline 314, one end of which is connected to the detection body 311, and the other end of the lower pipeline 314 is connected to a position corresponding to a low liquid level and a position corresponding to a minimum liquid level on the liquid collecting bag 2, and a lower valve 315 is installed on the lower pipeline 314.

[0032] In one embodiment of the utility model, when the liquid level detector 31 is detecting, the upper hand valve 313 and the lower hand valve 315 can be used to establish or close the connection between the detection body 311 and the liquid collecting bag 2. Specifically, by connecting one end of the upper pipeline 312 to the detection body 311 and the other end to the liquid collecting bag 2, the liquid level detector 31 can monitor the signal of the condensate in the liquid collecting bag 2 reaching a high liquid level or a maximum liquid level. And by connecting one end of the lower pipeline 313 to the detection body 311 and the other end to the liquid collecting bag 2, the liquid level detector 31 can monitor the signal of the condensate in the liquid collecting bag 2 reaching a low liquid level or a minimum liquid level.

[0033] like Figure 1 As shown, the control valve assembly 42 includes: a front hand valve 421, the input end of the front hand valve 421 is connected to the bottom of the liquid collecting bag 2; a cut-off valve 422, the input end of the cut-off valve 422 is connected to the output end of the front hand valve 421; a rear hand valve 423, the input end of the rear hand valve 423 is connected to the output end of the cut-off valve 422, and the output end of the rear hand valve 423 is connected to the top side of the torch liquid separation tank 41; and a drain valve 424, the drain valve 424 is installed between the cut-off valve 422 and the rear hand valve 423; wherein, when the liquid level detector 31 detects that the liquid level height reaches the lowest liquid level, the cut-off valve 422 is controlled to close the connection between the liquid collecting bag 2 and the torch liquid separation tank 41; when the liquid level detector 31 detects that the liquid level height reaches the highest liquid level, the cut-off valve 422 is controlled to open to connect the liquid collecting bag 2 and the torch liquid separation tank 41.

[0034] In one embodiment of the utility model, the shut-off valve 422 is an automatic control valve, which can control the shut-off valve 422 to be closed or opened when the corresponding minimum liquid level signal or maximum liquid level signal is detected by the liquid level detector 31 and collected by the signal transmitter 32. Of course, the shut-off valve 422 can also be a manual valve to achieve the connection or disconnection between the liquid collecting bag 2 and the torch liquid separation tank 41. Specifically, when performing maintenance, it can also be handled by closing the front hand valve 421 in front of the shut-off valve 422 and the rear hand valve 423 behind the shut-off valve 422. The drain valve 424 is used to drain the condensate in the pipeline between the front hand valve 421 and the rear hand valve 423.

[0035] The input end of the rear hand valve 423 is provided with an isolation blind plate 425 connected to the output end of the cut-off valve 422, and a root hand valve 426 is also provided between the flare liquid separator 41 and the output end of the rear hand valve 423. In this embodiment, the isolation blind plate 425 is added to facilitate the isolation of the fuel gas system. By opening or closing the root hand valve 426 of the flare liquid separator 41, the condensate in the pipeline from the liquid collecting bag 2 to the flare liquid separator 41 can be controlled to be connected to the flare liquid separator 41.

[0036] Specifically, the fuel gas medium pressure of the gas pipeline body 1 is 0.5 MPa, and the back pressure of the flare separator tank 41 is 0.1 MPa. In this embodiment, by designing the fuel gas medium pressure of the gas pipeline body 1 to be higher than the back pressure of the flare separator tank 41, it is convenient to transport the fuel gas condensate without its own gravity, that is, by negative pressure.

[0037] The utility model also provides a pulverized coal gasification and pulverizing system, comprising the above-mentioned fuel gas pipeline liquid collecting bag drainage system.

[0038] In summary, the utility model not only realizes the collection of condensate in the liquid-carrying fuel gas, but also realizes the transportation of the fuel gas condensate to the flare liquid separator 41 by designing the fuel gas medium pressure of the gas pipeline body 1 to be higher than the back pressure of the flare liquid separator 41, and also realizes the transportation of the fuel gas condensate to the flare liquid separator 41 by negative pressure instead of its own gravity. The liquid level in the liquid collecting bag 2 can be monitored by the liquid level monitoring unit 3, and due to the pressure difference formed between the gas pipeline body 1 and the flare liquid separator 41, the condensate level can be monitored in real time by using the liquid level monitoring unit 3. If the condensate is at the lowest level, the control valve assembly 42 will promptly shut off the connection between the gas pipeline body 1 and the flare liquid separator 41 to prevent the risk of high pressure colliding with low pressure, so that the entire drainage system can perform drainage work in a safe state. Therefore, the utility model effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0039] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A fuel gas pipeline liquid collection bag drainage system, characterized in that: include: A gas pipeline body (1), the gas pipeline body (1) being arranged transversely to transport fuel gas; A liquid collecting bag (2), the top of which is connected to the air pipe line body (1); A liquid level monitoring unit (3), the liquid level monitoring unit (3) being installed on one side of the liquid collecting bag (2) to detect liquid level data in the liquid collecting bag (2); as well as A flare liquid separator device (4), the flare liquid separator device (4) comprising a flare liquid separator (41) and a control valve assembly (42), the lower end of the liquid collecting bag (2) being connected to the flare liquid separator (41) via the control valve assembly (42), the control valve assembly (42) being electrically connected to the liquid level monitoring unit (3) to control the communication between the liquid collecting bag (2) and the flare liquid separator (41); Wherein, the medium pressure of the fuel gas in the gas pipeline body (1) is greater than the back pressure of the flare liquid separation tank (41); The liquid level monitoring unit (3) comprises: a liquid level detector (31), the liquid level detector (31) being connected to the liquid collecting bag (2) to detect a liquid level alarm signal of the liquid collecting bag (2); and A signal transmitter (32), the signal transmitter (32) being connected to the liquid level detector (31) to transmit the liquid level alarm signal to a remote end; The liquid level detector (31) comprises: Detection body (311); an upper pipeline (312), one end of the upper pipeline (312) being connected to the detection body (311), the other end of the upper pipeline (312) being connected to a position corresponding to a high liquid level and a position corresponding to a maximum liquid level on the liquid collecting bag (2), and an upper hand valve (313) being installed on the upper pipeline (312); and A lower pipeline (314), one end of which is connected to the detection body (311), and the other end of which is connected to a position corresponding to a low liquid level and a position corresponding to a minimum liquid level on the liquid collecting bag (2), and a lower hand valve (315) is installed on the lower pipeline (314).

2. The fuel gas pipeline liquid collection bag drainage system according to claim 1, characterized in that: The liquid level alarm signal includes a high liquid level alarm signal and a low liquid level alarm signal.

3. The fuel gas pipeline liquid collection bag drainage system according to claim 2, characterized in that: The lowest liquid level in the liquid collecting bag (2) is 100 mm, the highest liquid level is 480 mm, the high liquid level corresponding to the high liquid level alarm signal is 450 mm, and the low liquid level corresponding to the low liquid level alarm signal is 150 mm.

4. The fuel gas pipeline liquid collection bag drainage system according to claim 2, characterized in that: The liquid level detector (31) is a local liquid level meter, and the signal transmitter (32) is a remote liquid level meter.

5. The fuel gas pipeline liquid collection bag drainage system according to claim 3, characterized in that: The control valve assembly (42) comprises: A front hand valve (421), wherein the input end of the front hand valve (421) is connected to the bottom of the liquid collection bag (2); A cut-off valve (422), wherein an input end of the cut-off valve (422) is connected to an output end of the front hand valve (421); a rear hand valve (423), wherein the input end of the rear hand valve (423) is connected to the output end of the cut-off valve (422), and the output end of the rear hand valve (423) is connected to one side of the top of the flare liquid separation tank (41); and a drainage valve (424), the drainage valve (424) being installed between the cut-off valve (422) and the rear hand valve (423); When the liquid level detector (31) detects that the liquid level has reached the minimum liquid level, the shut-off valve (422) is controlled to close the connection between the liquid collecting bag (2) and the flare liquid separation tank (41); when the liquid level detector (31) detects that the liquid level has reached the maximum liquid level, the shut-off valve (422) is controlled to open, so that the liquid collecting bag (2) and the flare liquid separation tank (41) are connected.

6. The fuel gas pipeline liquid collection bag drainage system according to claim 5, characterized in that: The input end of the rear hand valve (423) is provided with an isolation blind plate (425) connected to the output end of the cut-off valve (422), and a root hand valve (426) is also provided between the flare liquid separation tank (41) and the output end of the rear hand valve (423).

7. The fuel gas pipeline liquid collection bag drainage system according to claim 1, characterized in that: The fuel gas medium pressure of the gas pipeline body (1) is 0.5 MPa, and the back pressure of the flare liquid separation tank (41) is 0.1 MPa.

8. A pulverized coal gasification and pulverizing system, characterized in that: It comprises the fuel gas pipeline liquid collecting bag drainage system as described in any one of claims 1-7.

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