Control system for improving valley shifting and flat shifting peak filling amount of gas holder

Abstract

The utility model discloses a control system for improving valley shifting and flat shifting peak filling quantity of a gas holder, which comprises a gas header pipe, a gas holder conveying header pipe and a second conveying pipeline, and the gas holder conveying header pipe and the second conveying pipeline are both communicated with the gas header pipe. The ends, away from the gas main pipe, of the gas cabinet conveying main pipe and the second conveying pipe are communicated with a gas cabinet and a gas user side respectively. The opening degree of the second remote control regulating valve is regulated according to the monitoring pressure of the second pressure gauge, the cabinet capacity and the cabinet lifting speed; if the gas cabinet needs to be lifted, the opening degree of the second remote control regulating valve is regulated to ensure that the cabinet capacity of the gas cabinet is in a rising trend, and the cabinet capacity of the gas cabinet is lifted to a high cabinet position before peak electricity is started; at the electricity utilization peak, the opening degree of the second remote control regulating valve is increased, the first remote control regulating valve is gradually turned down, gas can be supplied to most of the gas user sides through the gas holder, and therefore the external supply amount of the gas holder is increased, stable conveying of gas by the gas pipe network is achieved, and the self-contained generator set is promoted to generate more electricity at the electricity utilization peak.

Description

Technical Field

[0001] The utility model relates to the technical field of gas transportation control, in particular to a control system for improving the valley shifting and peak filling capacity of a gas cabinet. Background Art

[0002] In the steel industry, gasholders primarily balance gas system network pressure and regulate tank capacity to increase peak power generation. To ensure continuous online operation and balance network pressure, the gasholder's designed operating pressure is aligned with the regional gas network operating pressure benchmark. During peak demand periods, the pressure is controlled to the lower limit of the gas network operating pressure standard (reducing the network pressure), thereby increasing gasholder output. However, to ensure the pressure and demand of gas users, especially end-users, the network pressure cannot be reduced excessively. The operating pressure within the gasholder is only slightly higher than the network pressure, resulting in slower gas output. It is impossible to guarantee that the gasholder capacity will be reduced to the minimum before the peak period ends, which presents a certain potential problem. Furthermore, if the network pressure drops too much, end-users will be unable to operate normally.

[0003] The prior art (CN220397284U) discloses a blast furnace gas efficiency improvement system, which includes a gas holder, a blast furnace and a gas holder compressor. The gas holder compressor is set up so that the gas generated by the blast furnace is pressurized along the first pipeline and the air inlet pipe through the gas holder compressor in sequence. The gas holder compressor increases the pressure in the air outlet pipe and the gas pipeline. Under the action of pressure, the gas enters the gas holder, the gas holder rises, and the gas storage of the gas holder increases. During peak power periods, the power plant's demand for gas increases. By controlling the regulating valve, the gas generated by the blast furnace is transported to the power plant along the first pipeline and the gas pipeline in sequence. At the same time, the gas stored in the gas holder is transported to the power plant, providing gas to the power plant in a timely manner, avoiding the situation where the blast furnace gas pipeline network pressure is too low; it can conveniently solve the problem that the gas holder cannot increase the gas storage, is simple to operate, and is suitable for promotion.

[0004] However, the above technical solution requires investment in the construction of gas compression equipment and factory buildings, which will occupy a large amount of land resources. In addition, the operating workload of personnel is large. After the addition of gas compression equipment, the compressor needs to be frequently started and stopped, and it is estimated that it will be started and stopped four times a day. In addition, manual inspections are required during the operation of the equipment, and the compressor impeller needs to be regularly cleaned, repaired and replaced. This results in high electricity consumption and high daily operating costs.

[0005] Therefore, it is necessary to develop a control system that improves the valley shifting and peak filling capacity of gas tanks to solve the above problems. Utility Model Content

[0006] The technical problem to be solved by the present invention is to address the deficiencies of the above-mentioned prior art and to provide a control system that improves the valley shifting and peak filling capacity of the gas holder. By designing the pipeline network layout, one or more gas users near the gas holder are selected according to the construction location of the gas holder and the distribution of the gas pipeline network, so that their gas transmission pipelines are connected with the inlet and outlet pipelines of the gas holder and a remote control device is added. The gas holder can be used as the main supplier of gas during peak electricity consumption, thereby increasing the external supply of the gas holder during peak electricity consumption, realizing stable gas transportation by the gas pipeline network, and promoting the self-contained generator set to generate more electricity during peak electricity consumption, so as to solve the problems raised in the background technology.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A control system for improving the valley shifting and peak filling capacity of a gas tank, comprising a gas main, a gas tank delivery main, and a second delivery pipeline. The gas tank delivery main and the second delivery pipeline are both connected to the gas main. Ends of the gas tank delivery main and the second delivery pipeline, which are remote from the gas main, are respectively connected to the gas tank and a gas user end. A gas supply connecting branch pipe A is connected between the gas tank delivery main and the second delivery pipeline to enable communication between the gas tank and the gas user end. A gas supply connecting branch pipe B is connected between the second delivery pipeline and the gas main.

[0009] A first remote-controlled regulating valve is installed on the gas tank delivery main pipe;

[0010] The air supply connecting branch pipe B is equipped with an air supply branch pipe butterfly valve and an air supply branch pipe glasses valve;

[0011] The air supply connecting branch pipe A is equipped with a connecting pipe butterfly valve and a connecting pipe glasses valve;

[0012] When the butterfly valve and glasses valve of the gas supply branch are closed, and the butterfly valve and glasses valve of the connecting pipeline are opened, the gas is delivered to the gas user end through the gas tank delivery main pipe, the gas supply connecting branch pipe A and the second delivery pipeline, and the first remote-controlled regulating valve is used to adjust the size of the internal passage of the gas tank delivery main pipe.

[0013] Preferably, a gas tank butterfly valve and a second remote-controlled regulating valve are installed on the gas tank delivery main pipe.

[0014] Preferably, a gas V-shaped water seal is installed on the gas tank delivery main pipe for use as a gas tank maintenance partition, and the gas V-shaped water seal is located between the gas tank butterfly valve and the second remote control regulating valve.

[0015] Preferably, both ends of the gas supply connecting branch pipe A are connected to the gas tank delivery main pipe and the second delivery pipeline through a tee pipe.

[0016] Preferably, the air supply connecting branch pipe A and the air supply branch pipe glasses valve are located between the three-way pipe on the second delivery pipeline and the gas main.

[0017] Preferably, the first remote-controlled regulating valve is located between the three-way pipe on the gas tank delivery main and the gas main.

[0018] Preferably, a first pressure gauge is provided on the second delivery pipeline near the gas user end, a second pressure gauge is provided inside the tee pipe on the gas tank delivery main pipe, and a third pressure gauge is provided inside the gas tank. The first pressure gauge, the second pressure gauge and the third pressure gauge are used to monitor the user end pressure, the delivery pipeline pressure and the gas tank internal pressure respectively.

[0019] The control system also includes a controller, the input and output ends of the controller are electrically connected to an A / D converter and a D / A converter, respectively; the first pressure gauge, the second pressure gauge, and the third pressure gauge are all electrically connected to the A / D converter; and the first remote-controlled regulating valve and the second remote-controlled regulating valve are both electrically connected to the D / A converter.

[0020] Preferably, the connection end of the controller is electrically connected to a touch display for displaying the pressure values ​​monitored by the first pressure gauge, the second pressure gauge and the third pressure gauge, and the touch display is also used for human-computer interaction with the controller to set the triggering conditions of the first remote-controlled regulating valve and the second remote-controlled regulating valve.

[0021] Preferably, the number of the gas user end is at least one, and the multiple gas user ends are all connected in parallel to the pipe network output end of the second transmission pipeline.

[0022] The utility model has the following beneficial effects:

[0023] The pipeline network is controlled to be open / closed through the first remote-controlled regulating valve, the butterfly valve of the gas holder, the butterfly valve of the connecting pipeline, and the glasses valve of the connecting pipeline. The opening of the second remote-controlled regulating valve is adjusted according to the monitoring pressure of the second pressure gauge, the cabinet capacity and the speed of lifting the cabinet. If the gas holder needs to be upgraded, the pressure of the gas pipeline network is increased, and the opening of the second remote-controlled regulating valve is adjusted to ensure that the gas holder capacity is on an upward trend, and the gas holder capacity is increased to a high cabinet position before the peak power consumption begins. If the gas holder needs to increase the amount of external gas supply during peak power consumption, the opening of the second remote-controlled regulating valve is increased, and the first remote-controlled regulating valve is gradually closed. Most of the gas users on the second transmission pipeline can be supplied by the gas holder, thereby increasing the external supply of the gas holder. The gas holder capacity is reduced to the minimum before the peak power consumption ends, thereby realizing stable gas transportation to the gas pipeline network and promoting the self-provided generator set to generate more power during peak power consumption.

[0024] The regional linkage of the gas pipeline network provided by this system is used to increase the amount of gas tanks shifting valleys or leveling peaks. The operation process is simple and efficient, which simplifies the tedious procedures of frequently starting and stopping compressors in the existing technology, reduces the workload of personnel operations, and does not require the construction of gas pressurizing equipment and factory buildings, reducing one-time investment. Fewer equipment are used in operation, low power consumption, low failure rate, and can reduce daily operating costs and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The overall pipe network distribution diagram of the control system for improving the valley shifting and peak filling capacity of the gas tank provided by the utility model;

[0026] Figure 2 This is a control flow chart of a control system for improving the valley shifting and peak filling capacity of a gas tank provided by the utility model.

[0027] Among them are:

[0028] Gas tank delivery main pipe-1; first remote-controlled regulating valve-2; gas tank butterfly valve-3; gas V-type water seal-4; second remote-controlled regulating valve-5; gas tank-6; gas supply branch butterfly valve-7; gas supply branch eyeglass valve-8; second delivery pipeline-9; first pressure gauge-10; second pressure gauge-11; third pressure gauge-12; connecting pipeline butterfly valve-13; connecting pipeline eyeglass valve-14; gas supply connecting branch pipe A-15; gas main pipe-16; controller-17; touch screen display-18; gas supply connecting branch pipe B-19. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and specific preferred embodiments.

[0030] In the description of the present invention, it should be understood that the terms "left side," "right side," "upper," "lower," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Terms such as "first" and "second" do not indicate the importance of a component and therefore should not be construed as limiting the present invention. The specific dimensions used in this embodiment are merely for illustrative purposes and do not limit the scope of protection of the present invention.

[0031] like Figure 1-2As shown, a control system for improving the valley shifting and peak filling capacity of a gas holder comprises a gas main 16, a gas holder delivery main 1, and a second delivery pipeline 9. The gas holder delivery main 1 and the second delivery pipeline 9 are both connected to the gas main 16. An end of the gas main 16 is connected to a gas source, from which gas is delivered for delivery. The ends of the gas holder delivery main 1 and the second delivery pipeline 9 away from the gas main 16 are respectively connected to the gas holder 6 and a gas user end. Specifically, the output end of the gas holder delivery main 1 is connected to the input end of the gas holder 6, and the output end of the second delivery pipeline 9 is connected in parallel with at least one gas user end through a pipeline network as a gas user end. A gas supply connecting branch A15 is connected between the gas holder delivery main 1 and the second delivery pipeline 9 to enable communication between the gas holder 6 and the gas user end. A gas supply connecting branch B19 is connected between the second delivery pipeline 9 and the gas main 16.

[0032] A first remote-controlled regulating valve 2 is installed on the gas tank delivery main pipe 1 to adjust the opening and closing and opening degree of the gas tank delivery main pipe 1; a gas supply branch pipe butterfly valve 7 and a gas supply branch pipe eyeglass valve 8 are installed on the gas supply connecting branch pipe B19; a connecting pipe butterfly valve 13 and a connecting pipe eyeglass valve 14 are installed on the gas supply connecting branch pipe A15;

[0033] When the gas supply branch butterfly valve 7 and the gas supply branch glasses valve 8 are closed (normally fully closed), and the connecting pipe butterfly valve 13 and the connecting pipe glasses valve 14 are opened (fully open), the first remote control valve 2 is used to adjust the size of the internal passage, and the gas is delivered to the gas user end through the gas cabinet delivery main pipe 1, the gas supply connecting branch pipe A15 and the second delivery pipeline 9;

[0034] According to the construction location of the gas tank 6 and the distribution of the gas pipeline network, one or more gas users near the gas tank 6 are selected, and their gas transmission pipelines are connected to the inlet and outlet pipelines of the gas tank 6 and a remote control device is added. The gas tank can be used as the main gas supply during peak electricity consumption, thereby increasing the external supply of the gas tank during peak electricity consumption and promoting the self-contained generator set to generate more electricity during peak electricity consumption.

[0035] Specifically, a gas tank butterfly valve 3 and a second remote control regulating valve 5 are installed on the gas tank delivery main pipe 1 .

[0036] Specifically, a V-shaped gas water seal 4 is installed on the gas tank delivery main pipe 1. The V-shaped gas water seal 4 is located between the gas tank butterfly valve 3 and the second remote control valve 5. It is used to isolate the gas tank 6 for maintenance. The V-shaped water seal 4 is often used behind the butterfly valve. After water is injected, the gas can be reliably cut off. The butterfly valve and glasses valve used in this application are supporting structures of the gas branch pipe. The glasses valve has the same function as the V-shaped water seal 4.

[0037] The first remote-controlled regulating valve 2 can be closed only when the gas tank 6 is used as the main gas source, and is basically in the fully open state at other times. The second remote-controlled regulating valve 5 normally adjusts its opening according to the requirements of raising and lowering the gas tank 6 and stabilizing the pressure, and is interlocked with the first remote-controlled regulating valve 2. When the first remote-controlled regulating valve 2 is closed, the second remote-controlled regulating valve 5 must be fully opened. When the second remote-controlled regulating valve 5 is closed or fully closed, the first remote-controlled regulating valve 2 must be fully opened.

[0038] Specifically, both ends of the gas supply connecting branch pipe A15 are connected to the gas tank delivery main pipe 1 and the second delivery pipeline 9 through a tee pipe.

[0039] Specifically, the gas supply branch pipe butterfly valve 7 and the gas supply branch pipe glasses valve 8 are located between the tee pipe on the second delivery pipeline 9 and the gas main 16 .

[0040] Specifically, the first remote-controlled regulating valve 2 is located between the three-way pipe on the gas tank delivery main pipe 1 and the gas main pipe 16 .

[0041] Specifically, a first pressure gauge 10 is provided on the second delivery pipeline 9 near the gas user end, a second pressure gauge 11 is provided inside the tee pipe on the gas tank delivery main pipe 1, and a third pressure gauge 12 is provided inside the gas tank 6. The first pressure gauge 10, the second pressure gauge 11 and the third pressure gauge 12 are used to monitor the user end pressure, the delivery pipeline pressure and the internal pressure of the gas tank 6 respectively.

[0042] The control system also includes a controller 17, the input and output ends of the controller 17 are electrically connected to an A / D converter and a D / A converter, respectively. The first pressure gauge 10, the second pressure gauge 11, and the third pressure gauge 12 are all electrically connected to the A / D converter, and the first remote-controlled regulating valve 2 and the second remote-controlled regulating valve 5 are both electrically connected to the D / A converter. The connection end of the controller 17 is electrically connected to a touch display 18 for displaying the pressure values ​​monitored by the first pressure gauge 10, the second pressure gauge 11, and the third pressure gauge 12. The touch display 18 is also used for human-computer interaction with the controller 17 to set the triggering conditions of the first remote-controlled regulating valve 2 and the second remote-controlled regulating valve 5.

[0043] The second remote control valve 5 is interlocked with the cabinet capacity and the first remote control valve 2: when the cabinet capacity is close to the upper limit interlock value (for example, the upper limit of the cabinet capacity is 100,000 m³, the approach value can be set to 95,000 m³), ​​the interlocked first remote control valve 2 is in the fully open state. When the cabinet capacity reaches the upper limit interlock value, the second remote control valve 5 is interlocked and closed. When the pressure monitored by the second pressure gauge 11 is lower than the pressure monitored by the third pressure gauge 12 and gas supply from the gas tank 6 is required, the second remote control valve 5 is opened. When the cabinet capacity is close to the lower limit interlock value ( For example, if the lower limit of the tank capacity is 20,000 m³, the approximate value can be set to 25,000 m³). The first remote-controlled regulating valve 2 is fully open. If the tank needs to be upgraded, when the pressure monitored by the second pressure gauge 11 is higher than the pressure monitored by the third pressure gauge 12, the second remote-controlled regulating valve 5 is controlled to perform the upgrade. If the tank does not need to be upgraded and the tank capacity reaches the lower limit of the operation, the second remote-controlled regulating valve 5 is closed. When the pressure monitored by the second pressure gauge 11 is higher than the pressure monitored by the third pressure gauge 12 and the gas tank needs to be upgraded, the second remote-controlled regulating valve 5 is opened again.

[0044] The working principle of the utility model is as follows: during the off-peak or normal period of electricity consumption, the first remote-controlled regulating valve 2, the butterfly valve 3 of the gas tank, the butterfly valve 13 of the connecting pipeline, and the glasses valve 14 of the connecting pipeline are all in the fully open state. The opening of the second remote-controlled regulating valve 5 is adjusted according to the monitoring pressure of the second pressure gauge 11, the cabinet capacity and the speed of the cabinet lifting; when the gas tank 6 needs to be lifted, the pressure of the gas tank delivery main 1 is controlled according to the upper limit of the operating pressure standard. By adjusting the opening of the second remote-controlled regulating valve 5, the cabinet capacity of the gas tank 6 is guaranteed to be on the rise, and the gas tank 6 is lifted before the peak electricity consumption begins. The capacity of gas tank 6 is raised to the highest position; if the gas tank 6 needs to increase the external gas supply during peak electricity consumption, the opening of the second remote-controlled regulating valve 5 can be increased and the first remote-controlled regulating valve 2 can be gradually closed (keeping a minimum opening of 5-15°). Most of the gas users on the second transmission pipeline 9 can be supplied by the gas tank 6, thereby increasing the external gas supply of the gas tank 6. The capacity of gas tank 6 can be reduced to the minimum before the peak electricity consumption ends. During the adjustment process, the principle is that the descent speed of the gas tank 6 does not exceed the operating standard and the first pressure gauge 10 is not lower than the user's demand pressure.

[0045] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A control system for improving the valley shifting and peak filling capacity of a gas tank, comprising a gas main (16), a gas tank delivery main (1) and a second delivery pipeline (9), wherein the gas tank delivery main (1) and the second delivery pipeline (9) are both connected to the gas main (16), and the ends of the gas tank delivery main (1) and the second delivery pipeline (9) away from the gas main (16) are respectively connected to the gas tank (6) and the gas user end, characterized in that: A gas supply connecting branch pipe A (15) is connected between the gas tank delivery main pipe (1) and the second delivery pipe (9), so that the gas tank (6) can be directly connected to the gas user end, and a gas supply connecting branch pipe B (19) is connected between the second delivery pipe (9) and the gas main pipe (16); A first remote-controlled regulating valve (2) is installed on the gas tank delivery main pipe (1); The air supply connecting branch pipe B (19) is equipped with an air supply branch pipe butterfly valve (7) and an air supply branch pipe glasses valve (8); The air supply connecting branch pipe A (15) is provided with a connecting pipe butterfly valve (13) and a connecting pipe glasses valve (14); When the gas supply branch pipe butterfly valve (7) and the gas supply branch pipe eyeglass valve (8) are closed, and the connecting pipe butterfly valve (13) and the connecting pipe eyeglass valve (14) are opened, the gas is delivered to the gas user end through the gas tank delivery main pipe (1), the gas supply connecting branch pipe A (15) and the second delivery pipe (9), and the first remote control valve (2) is used to adjust the size of the internal passage of the gas tank delivery main pipe (1).

2. A control system for improving the valley shifting and peak filling capacity of gas tanks according to claim 1, characterized in that: The gas tank delivery main pipe (1) is provided with a gas tank butterfly valve (3) and a second remote control regulating valve (5).

3. The control system for improving the valley shifting and peak filling capacity of gas tanks according to claim 1, characterized in that: A gas V-shaped water seal (4) is installed on the gas tank delivery main pipe (1) for use as a gas tank (6) maintenance partition, and the gas V-shaped water seal (4) is located between the gas tank butterfly valve (3) and the second remote control regulating valve (5).

4. A control system for improving the valley shifting and peak filling capacity of gas tanks according to claim 2, characterized in that: The two ends of the gas supply connecting branch pipe A (15) are connected to the gas tank delivery main pipe (1) and the second delivery pipeline (9) through a tee pipe.

5. A control system for improving the valley shifting and peak filling capacity of gas tanks according to claim 4, characterized in that: The gas supply branch pipe butterfly valve (7) and the gas supply branch pipe glasses valve (8) are located between the tee pipe on the second delivery pipeline (9) and the gas main (16).

6. A control system for improving the valley shifting and peak filling capacity of gas tanks according to claim 4, characterized in that: The first remote-controlled regulating valve (2) is located between the three-way pipe on the gas cabinet delivery main pipe (1) and the gas main pipe (16).

7. The control system for improving the valley shifting and peak filling capacity of gas tanks according to claim 4, characterized in that: A first pressure gauge (10) is provided on the second delivery pipeline (9) at a position close to the gas user end, a second pressure gauge (11) is provided inside the three-way pipe on the gas tank delivery main pipe (1), and a third pressure gauge (12) is provided inside the gas tank (6). The first pressure gauge (10), the second pressure gauge (11) and the third pressure gauge (12) are used to monitor the user end pressure, the delivery pipeline pressure and the internal pressure of the gas tank (6), respectively.

8. The control system for improving the valley shifting and peak filling capacity of gas tanks according to claim 7, characterized in that: The controller (17) is also included. The input end and output end of the controller (17) are electrically connected to an A / D converter and a D / A converter, respectively. The first pressure gauge (10), the second pressure gauge (11) and the third pressure gauge (12) are all electrically connected to the A / D converter. The first remote-controlled regulating valve (2) and the second remote-controlled regulating valve (5) are both electrically connected to the D / A converter.

9. A control system for improving the valley shifting and peak filling capacity of gas tanks according to claim 8, characterized in that: The connection end of the controller (17) is electrically connected to a touch display (18) for displaying the pressure values ​​monitored by the first pressure gauge (10), the second pressure gauge (11) and the third pressure gauge (12), and the touch display (18) is also used for human-computer interaction with the controller (17) to set the triggering conditions of the first remote-controlled regulating valve (2) and the second remote-controlled regulating valve (5).

10. The control system for improving the valley shifting and peak filling capacity of gas tanks according to claim 1, characterized in that: The number of the gas user terminals is at least one, and the multiple gas user terminals are all connected in parallel to the pipe network output end of the second transmission pipeline (9).

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