CN220749849U - Automatic blow-down device for gas pressurized condensate water - Google Patents

Abstract

The utility model provides an automatic drainage device for pressurized condensed water of coal gas, belonging to the field of gas production and supply; comprises a Roots blower, a raw material gas cooler, a raw material gas separator, a bag-type bottom, a primary sewage collection tank, a secondary sewage collection tank and a pretreatment waste liquid tank; the coke oven gas is introduced into a raw gas cooler through a tube body by a Roots blower; the raw material gas cooler is connected with the raw material gas separator through a pipe body, a bag-shaped groove is formed in the middle of the pipe body connecting the raw material gas cooler with the raw material gas separator, the bag-shaped groove is connected with the top of the primary sewage collection tank through a pipe body, the bottom surface of the primary sewage collection tank is connected with the top surface of the secondary sewage collection tank through a pipe body, and the primary sewage collection tank and the secondary sewage collection tank are connected with the pretreatment waste liquid tank through pipe bodies; the pressure in the collecting tank of the primary sewage draining tank is smaller than the atmospheric pressure.

Description

Automatic blow-down device for gas pressurized condensate water

Technical Field

The utility model belongs to the field of gas production and supply, and particularly relates to an automatic drainage device for pressurized condensed water of gas.

Background

The coke oven gas pressurized by the Roots blower (pressurized to 50 kPaG) enters the raw material gas separator after being cooled by the raw material gas cooler, a large amount of sewage is generated in the cooling process, if 30000Nm < 3 >/h of coke oven gas is used for calculation, the water discharge amount per hour reaches 8m < 3 >, and the coke oven gas is required to be frequently operated by a worker for manual pollution discharge, so that the operation is extremely complicated, the labor intensity of the worker is increased, and even the physical health of the worker is influenced; however, if the sewage is not discharged timely, the sewage accumulation in the pipeline can cause the increase of system resistance, so that the gas processing system is stopped. Therefore, a set of automatic sewage drainage system is urgently needed, and sewage in the whole sewage drainage system is ensured not to be accumulated while sewage is automatically drained.

Disclosure of Invention

The utility model provides a gas pressurized condensed water automatic sewage disposal device, which is characterized in that a DCS system is arranged to open an adjusting valve to automatically control liquid level, so that redundant sewage in a primary sewage disposal collecting tank is discharged to a secondary sewage disposal collecting tank, and automatic sewage disposal of a gas pipeline is realized; the sewage is collected into the first-level sewage tank by setting the first-level sewage collecting tank to be smaller than the atmospheric pressure, and the bag-type groove and the sewage valve are arranged at one level, so that the sewage circulation in the whole baby system is ensured.

In order to achieve the above purpose, the technical scheme adopted in the application is as follows:

an automatic drainage device for pressurized condensed water of coal gas comprises a Roots blower, a raw material gas cooler, a raw material gas separator, a bag-shaped bottom, a primary drainage collection tank, a secondary drainage collection tank and a pretreatment waste liquid tank; the coke oven gas is introduced into a raw gas cooler through a tube body by a Roots blower; the raw material gas cooler is connected with the raw material gas separator through a pipe body, a bag-shaped groove is formed in the middle of the pipe body connecting the raw material gas cooler with the raw material gas separator, the bag-shaped groove is connected with the top of the primary sewage collection tank through a pipe body, the bottom surface of the primary sewage collection tank is connected with the top surface of the secondary sewage collection tank through a pipe body, and the primary sewage collection tank and the secondary sewage collection tank are connected with the pretreatment waste liquid tank through pipe bodies; the pressure in the collecting tank of the primary sewage draining tank is smaller than the atmospheric pressure.

Preferably, the primary blowdown collection tank comprises a blowdown collection tank body, an in-situ spring pressure gauge, a pressure transmitter, a first liquid level gauge, a second liquid level gauge and a regulating valve; the first liquid level meter is a magnetic flap liquid level meter with a remote transmitter, and the second liquid level meter is an in-situ magnetic flap liquid level meter; the first liquid level meter and the second liquid level meter are connected to the side surface of the sewage collection tank body, the on-site spring pressure meter and the pressure transmitter are arranged on the top surface of the sewage collection tank body, the regulating valve is arranged on the bottom surface of the sewage collection tank body, and the regulating valve is arranged on a pipe body connected with the primary sewage collection tank and the secondary sewage collection tank.

Preferably, the remote transmitter of the first liquid level meter and the pressure transmitter and the regulating valve of the primary pollution discharge collecting tank are connected with the DCS system.

Preferably, the bottom of the bag-shaped groove is provided with a first blow-down valve, and the primary blow-down collecting tank is provided with a second blow-down valve; the first blow-down valve is arranged on a pipe body connected with the primary blow-down collecting tank at the bottom of the groove; the second blow-down valve is arranged on a pipe body connected with the first-stage blow-down collecting tank and the pretreatment waste liquid tank.

Preferably, the pipe body of the first-stage sewage collection tank connected with the pretreatment waste liquid tank comprises a sewage main pipe and a sewage branch pipe; the sewage branch pipe is connected to the first-stage sewage collection tank, the second sewage valve is arranged on the sewage branch pipe, and the inner diameter of the sewage branch pipe is 25mm; the main sewage draining pipe is connected to one end of the main sewage draining pipe far away from the first-stage sewage draining tank, and the inner diameter of the main sewage draining pipe is the sum of the inner diameters of the main sewage draining pipe.

Compared with the prior art, the utility model has the advantages and positive effects that:

1. through setting up first level gauge, pressure transmitter and the governing valve of connecting DCS system, the liquid level is around 400mm in the real-time automatic control one-level blowdown collection tank, with unnecessary sewage drain to ordinary pressure sewage tank, realize gas piping's automatic blowdown, avoid operating personnel's frequent operation, improve operating personnel's physical and mental health, ensure gas piping sewage drainage simultaneously, realize gas processing device's normal operating

2. The pressure of the primary pollution discharge collection tank is 90kPaG, and the on-site spring pressure gauge and the pressure transmitter are arranged to control the pressure in the primary pollution discharge collection tank to be smaller than the atmospheric pressure and larger than the pressure (50 kPaG) of the pressurized coke oven gas, so that the sewage generated in the coke oven gas cooling system is concentrated into the primary pollution discharge collection tank, and the circulation of a gas pipeline is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic flow chart of example 1;

FIG. 2 is a schematic diagram of a primary blowdown collection tank structure;

FIG. 3 is a schematic diagram of a DCS system connection;

FIG. 4 is an enlarged view of the structure at A;

FIG. 5 is an enlarged view of the structure at B;

in the figures, 1, a Roots blower; 2. a feed gas cooler; 3. a raw material gas separator; 4. a pollution discharge collection mechanism; 5. pretreatment of a waste liquid tank; 6. a first pipe; 7. a second pipe; 8. a first-stage sewage collection tank; 9. a secondary blowdown collection tank; 10. a third conduit; 11. a fourth conduit; 12. a blowdown collection tank body; 13. an in situ spring pressure gauge; 14. a pressure transmitter; 15. a first level gauge; 16. a second level gauge; 17. a regulating valve; 18. a remote transmitter; 19. a DCS system; 20. a pocket groove; 21. a first blow-down valve; 22. a second blow-down valve; 23. a sewage main pipe; 24. and (5) a pollution discharge branch pipe.

Detailed Description

In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be rendered by reference to the appended drawings and examples. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced otherwise than as described herein, and therefore the present utility model is not limited to the specific embodiments of the disclosure that follow.

The embodiment 1, as shown in fig. 1, aims to provide a gas pressurized condensate automatic sewage disposal device, which is used for discharging redundant sewage generated after cooling coke oven gas to a normal pressure sewage tank, realizing automatic sewage disposal of a gas pipeline, reducing labor cost and maintaining normal operation of a coke oven gas cooling and separating system; in order to achieve the aim, the automatic sewage disposal device comprises a Roots blower 1, a raw material gas cooler 2, a raw material gas separator 3, a sewage disposal collecting tank mechanism 4 and a pretreatment waste liquid tank 5; coke oven gas is introduced into the inlet of the raw material gas cooler 2 through the pipeline by the Roots blower 1 for cooling, the outlet of the raw material cooler 2 is connected with the inlet of the raw material separator 3 through the pipeline, the pipeline connecting the outlet of the raw material cooler 2 with the inlet of the raw material separator 3 is a first pipeline 6, a second pipeline 7 connected with the inlet at the top end of the blowdown collecting mechanism 4 is further arranged on the first pipeline 6, the outlet of the blowdown collecting mechanism 4 is connected with the inlet at the top end of the pretreatment waste liquid tank 5 through the pipeline, and the structure is the conventional common structure, so the detailed description is omitted in the embodiment.

As shown in fig. 1 to 3, the sewage collection mechanism 4 comprises two primary sewage collection tanks 8 arranged in parallel and a secondary sewage collection tank 9 arranged in series with the primary sewage collection tanks 8; the second pipeline 7 is connected with the inlet of the top surface of the primary sewage collection tank 8, and the outlet of the bottom surface of the primary sewage collection tank 8 is connected with the inlet of the top surface of the secondary sewage collection tank 9 through a third pipeline 10; the other outlet of the bottom surface of the primary sewage collection tank 8 and the outlet of the bottom surface of the secondary sewage collection tank 9 are connected to the pretreatment waste liquid tank 5 through a fourth pipeline 11;

the coke oven gas is pressurized to 50kPaG by the Roots blower 1, then is sent into the raw material gas cooler 2 through a pipeline for cooling, after cooling, the coke oven gas enters the raw material gas separator through the first pipeline 6, and sewage generated in the cooling process falls into the sewage collecting mechanism 4 through the second pipeline 7; sewage in the sewage disposal collection mechanism 4 enters the pretreatment waste liquid tank 5 through a fourth pipeline 11;

in general, the first-stage sewage collection tank 8 directly discharges sewage into the pretreatment waste liquid tank 5 through the fourth pipeline 11, and when the sewage quantity is too large, the fourth pipeline 11 has insufficient sewage discharge capacity, so that excessive accumulated sewage is accumulated in the first-stage sewage collection tank 8;

in order to timely discharge sewage in the primary sewage collection tank 8, the primary sewage collection tank 8 comprises a sewage collection tank body 12, an on-site spring pressure gauge 13, a pressure transmitter 14, a first liquid level gauge 15, a second liquid level gauge 16 and a regulating valve 17; the first liquid level meter 15 is a magnetic flap liquid level meter with a remote transmitter 18, the second liquid level meter 16 is an in-situ magnetic flap liquid level meter, and the first liquid level meter 15 and the second liquid level meter 16 are arranged on the side surface of the pollution discharge collection tank body 12; the on-site spring pressure gauge 13 and the pressure transmitter 14 are arranged on the top surface of the pollution discharge collection tank body 12, and the regulating valve 17 is arranged on the third pipeline 10; the remote transmitter 18 of the first liquid level meter 15, the pressure transmitter 14 of the primary sewage collection tank 8 and the regulating valve 17 are connected with the DCS system 19, and the pressure and the liquid level in the primary sewage collection tank 8 are controlled to be constant through the DCS system 19; the second liquid level meter 16 is arranged for inspection during inspection or comparison with the first liquid level meter 15 connected with the DCS system 19; when the automatic control device is used, the magnetic switch on the first liquid level meter 15 is used for realizing the liquid level high-low level alarm, and as the liquid level rises to about 300-500mm, an alarm signal outputs a 400mm switching value signal, and the 400mm switching value signal is used for controlling the opening and closing of the regulating valve 17, the principle is that the sewage flow of the first-stage sewage collection tank 8 is increased or reduced, so that the liquid level value in the tank body is automatically controlled to be maintained to about 400mm, and the operation capability of the first-stage sewage collection tank 8 is maintained; the redundant sewage of the primary sewage collection tank 8 is discharged into the secondary sewage collection tank 9 through the third pipeline 10, and the sewage in the primary sewage collection tank 8 is timely discharged;

the sewage in the first-stage sewage collection tank 8 is ensured to be cleaned in time, but in order to realize the automatic operation of the automatic sewage disposal device, the sewage needs to be kept to circulate in a pipeline, and the sewage cannot be accumulated at a certain place;

in order to keep sewage flowing in the pipeline, the automatic sewage disposal device is provided with a primary sewage disposal collection tank 8 with pressure of 90kPaG, and a pressure transmitter 14 connected with a DCS system 19 controls the pressure in the primary sewage disposal collection tank 8 to be constant; the coke oven gas is pressurized to 50kPaG by the Roots blower 1, and as the pressurized coke oven gas and the first-stage sewage collection tank 8 have pressure difference, the automatic sewage disposal device smoothly leads sewage into the first-stage sewage collection tank 8 by utilizing the pressure difference, and the principle is similar to a pump, and the pressure difference pumps the sewage to the first-stage sewage collection tank 8, so that the sewage circulates in a pipeline;

the automatic control of the sewage discharge capacity of the first-stage sewage collection tank 8 is realized to prevent sewage from accumulating in the first-stage sewage collection tank, and meanwhile, the sewage in the automatic sewage discharge device is led into the first-stage sewage collection tank 8 to realize the circulation of the sewage in a pipeline, so that the defect of unstable running of the device still exists, and some part of cost can be optimized;

as shown in fig. 2 and 4, in order to realize stable operation of the automatic sewage disposal device and reduce the automatic operation cost, the coke oven gas cooling and separating step and the sewage treatment step need to be isolated so that the coke oven gas cooling and separating step and the sewage treatment step have a sequential operation relationship; specifically, a bag-shaped groove 20 is arranged at the joint of the first pipeline 6 and the second pipeline 7, and a first blow-down valve 21 is arranged on the pipeline connected with the bottom surface of the bag-shaped groove 20; the bag-type groove 20 can store a part of sewage, so that the coke oven gas is fully cooled and separated, the pressure difference between the primary pollution discharge collection tank 8 and the coke oven gas is isolated, and the first pollution discharge valve 21 is arranged so that the coke oven gas cooling and separating step and the sewage treatment step can independently operate;

the second-stage sewage collection tank 9 is set as a normal pressure collection tank, and the pressure in the pretreatment waste liquid tank 5 is normal pressure, so that the pressure difference exists between the first-stage sewage collection tank 8 and the second-stage sewage collection tank 9 or the pretreatment waste liquid tank 5, and the sewage is conveniently discharged; but at the same time, the normal pressure of the secondary pollution discharge collection tank 9 or the pretreatment waste liquid tank 5 can destroy the pressure of the primary pollution discharge collection tank 8, even if the primary pollution discharge collection tank 8 is provided with a pressure transmitter 14 connected with a DCS system 19, the power of controlling the pressure can be increased, and the automatic pollution discharge operation cost is increased; so that the secondary pollution discharge collection tank 9, the pretreatment waste liquid tank 5 and the primary pollution discharge collection tank 8 need to be separated;

in order to realize the separation of the primary sewage collection tank 8 and the secondary sewage collection tank 9, a regulating valve 17 arranged on a third pipeline 10 connected with the primary sewage collection tank 8 and the secondary sewage collection tank 9 can separate the primary sewage collection tank 8 from the secondary sewage collection tank 9; specifically, in the sewage treatment step of the automatic sewage disposal device, the regulating valve 17 is initially in a closed state, when the valve is opened, a 400mm liquid level water seal exists in the primary sewage collection tank 8, so that the safety isolation of the primary sewage collection tank 8 and the secondary sewage collection tank 9 is realized, and the pressure in the primary sewage collection tank 8 is not destroyed while the sewage of the primary sewage collection tank 8 is smoothly discharged;

in order to separate the first-stage sewage collection tank 8 from the pretreatment waste liquid tank 5 as shown in fig. 2 and 5, a second regulating valve 22 is arranged on a fourth pipeline 11 connecting the first-stage sewage collection tank 8 with the pretreatment waste liquid tank 5 to separate the pretreatment waste liquid tank 5 from the first-stage sewage collection tank 8; meanwhile, a fourth pipeline 11 connecting the primary sewage collection tank 8 and the pretreatment waste liquid tank 5 comprises a sewage main pipe 23 and a sewage branch pipe 24; the sewage branch pipe 24 is connected with the outlet of the bottom of the primary sewage collection tank 8, the second sewage valve 22 is arranged on the sewage branch pipe 24, and one end of the sewage branch pipe 24, which is far away from the primary sewage collection tank 8, is connected with a sewage main pipe 23; the inner diameter of the drain branch pipe 24 is 25mm, and the inner diameter of the drain main pipe 23 is 50mm;

excessive sewage in the primary sewage collection tank 8 is prevented from accumulating excessively by timely discharging the excessive sewage in the primary sewage collection tank 8, and the sewage is led into the primary sewage collection tank 8 by controlling the pressure in the primary sewage collection tank 8 to be higher than the coke oven gas pressure after the Roots blower 1 is pressurized; meanwhile, the coke oven gas cooling and separating step and the sewage treatment step are separated by the bag-type groove 18 and the first blow-down valve 19; the setting of the second blow-down valve 20, the water seal of the sewage liquid level of 400mm in the first-stage blow-down collecting tank 8 and the setting of the pressure transmitter 14 connected with the DCS system 19 stabilize the pressure in the first-stage blow-down collecting tank 8, so that the automatic operation of the automatic blow-down device is realized together.

The present utility model is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present utility model will still fall within the protection scope of the technical solution of the present utility model.

Claims (5)

1. The automatic drainage device for the pressurized condensed water of the coal gas is characterized by comprising a Roots blower, a raw material gas cooler, a raw material gas separator, a bag-shaped bottom, a primary drainage collection tank, a secondary drainage collection tank and a pretreatment waste liquid tank; the coke oven gas is introduced into a raw gas cooler through a tube body by a Roots blower; the raw material gas cooler is connected with the raw material gas separator through a pipe body, a bag-shaped groove is formed in the middle of the pipe body connecting the raw material gas cooler with the raw material gas separator, the bag-shaped groove is connected with the top of the primary sewage collection tank through a pipe body, the bottom surface of the primary sewage collection tank is connected with the top surface of the secondary sewage collection tank through a pipe body, and the primary sewage collection tank and the secondary sewage collection tank are connected with the pretreatment waste liquid tank through pipe bodies; the pressure in the primary sewage collection tank is smaller than the atmospheric pressure.

2. The automatic blow-down device for gas pressurized condensate water according to claim 1, wherein the primary blow-down collection tank comprises a blow-down collection tank body, an in-situ spring pressure gauge, a pressure transmitter, a first liquid level gauge, a second liquid level gauge and a regulating valve; the first liquid level meter is a magnetic flap liquid level meter with a remote transmitter, and the second liquid level meter is an in-situ magnetic flap liquid level meter; the first liquid level meter and the second liquid level meter are connected to the side surface of the sewage collection tank body, the on-site spring pressure meter and the pressure transmitter are arranged on the top surface of the sewage collection tank body, the regulating valve is arranged on the bottom surface of the sewage collection tank body, and the regulating valve is arranged on a pipe body connected with the primary sewage collection tank and the secondary sewage collection tank.

3. The automatic sewage disposal device for gas pressurized condensate water according to claim 2, wherein the remote transmitter of the first liquid level meter and the pressure transmitter and the regulating valve of the primary sewage disposal collecting tank are connected with the DCS system.

4. The automatic drainage device for gas pressurized condensate water according to claim 1, wherein a first drainage valve is arranged at the bottom of the bag-shaped groove, and a second drainage valve is arranged on the primary drainage collection tank; the first blow-down valve is arranged on a pipe body connected with the primary blow-down collecting tank at the bottom of the groove; the second blow-down valve is arranged on a pipe body connected with the first-stage blow-down collecting tank and the pretreatment waste liquid tank.

5. The automatic sewage disposal device of gas pressurized condensate water according to claim 4, wherein the pipe body of the primary sewage disposal collection tank connected with the pretreatment waste liquid tank comprises a sewage disposal main pipe and a sewage disposal branch pipe; the sewage branch pipe is connected to the first-stage sewage collection tank, the second sewage valve is arranged on the sewage branch pipe, and the inner diameter of the sewage branch pipe is 25mm; the main sewage draining pipe is connected to one end of the main sewage draining pipe far away from the first-stage sewage draining tank, and the inner diameter of the main sewage draining pipe is the sum of the inner diameters of the main sewage draining pipe.