CN216619360U

CN216619360U - Venturi supercharged gas heat value lifting system

Info

Publication number: CN216619360U
Application number: CN202122903803.6U
Authority: CN
Inventors: 韩民; 韩铁岭; 赵连宽
Original assignee: Okay Energy Technology Tianjin Co ltd
Current assignee: Okay Energy Technology Tianjin Co ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-05-27
Anticipated expiration: 2031-11-25

Abstract

The utility model provides a Venturi supercharged gas calorific value lifting system, wherein the inlet end of a Venturi injection pipeline is respectively provided with a safety relief valve A, a manual emptying valve A and a safety relief valve root valve A, the Venturi injection pipeline comprises a Venturi injection pipeline body, a manual valve B, a pneumatic emergency cut-off valve, a pressure gauge B, a gas mixing chamber, a Venturi tube and an outlet manual valve, according to the Venturi ejector principle, the low-pressure low-concentration gas is sucked and boosted and uniformly mixed by utilizing the kinetic energy and the high heat value of the high-pressure high-concentration coal bed gas through a Venturi ejector to form mixed gas with suitable pressure and heat value for a gas end, the power is transmitted to the gas turbine through a rear-end pipe network to generate power, energy consumption and moving equipment are not needed in the gas mixing process, safety and reliability are achieved, kinetic energy conversion of the injection gas is completely utilized, energy is saved, consumption is reduced, and user project benefits are improved.

Description

Venturi supercharged gas heat value lifting system

Technical Field

The utility model relates to the technical field of mine gas conveying equipment, in particular to a Venturi supercharged gas heat value lifting system.

Background

Coal bed gas (the methane content is more than or equal to 95%) mined by an underground mine can be pressurized to enter a natural gas pipe network for long-distance gas delivery points to serve as industrial or civil gas, but the pressure (generally only 2-6KPa) and the calorific value (the methane content is 15-25%) of low-pressure low-concentration gas sucked out from lean ores are very low and close to the explosion limit, and the low-pressure low-concentration gas is usually directly discharged to the air as waste gas, so that energy waste is caused, the atmospheric environment is polluted, along with energy conservation and emission reduction by the nation, the environmental protection is increasingly emphasized, meanwhile, enterprises pay more attention to energy conservation and consumption reduction, the income and expenditure saving aspects are also increasingly concerned, the recovery and the utilization of the low-concentration gas are rising on a large scale, and the market is very wide.

As a new industry, the current low-pressure low-concentration gas utilization process is not mature, an explosion-proof fan is utilized for pressurization basically according to a foreign scheme, then the follow-up flow principle is utilized for proportional isobaric mixing, as the flow is large, the fan pressurization needs to consume a large amount of electric energy, the project income is greatly reduced, and according to the follow-up flow gas mixing principle, high-pressure coal bed gas or pipeline natural gas can be mixed after being greatly decompressed, so that the kinetic energy of the high-pressure gas is lost, and the energy waste is caused. At present, a simple, easy, safe and reliable process device is urgently needed, resources can be utilized to the maximum extent, and real energy conservation and consumption reduction can be realized.

Disclosure of Invention

In view of the above, the present invention aims to provide a venturi supercharged gas heat value increasing system, which utilizes the venturi injection process principle, and performs accurate calculation of a venturi injection pipe and a supersonic nozzle according to the requirements of high-pressure high-concentration coal bed gas or pipeline natural gas, low-pressure low-concentration gas and mixed gas pressure and heat value, and reasonably matches the flow specification of the venturi injector according to the gas consumption specification, so as to ensure that the mixed gas pressure and heat value are stable and uniform, no energy consumption component is required in the system, no moving equipment is required, and the system has the advantages of simple process, low cost, safe operation and reliable performance.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

the Venturi supercharged gas heat value lifting system is characterized by comprising a coal bed gas inlet pipeline, a mixed gas outlet pipeline, an explosion-proof pressure transmitter A, a pressure gauge A, an explosion-proof temperature transmitter A, a temperature gauge A, a Venturi injection pipeline, an explosion-proof methane difference meter, an explosion-proof pressure transmitter B, a pressure gauge C, an explosion-proof temperature transmitter B, a temperature gauge B and a Venturi injection pipeline valve group, wherein the explosion-proof pressure transmitter A, the pressure gauge A, the explosion-proof temperature transmitter A and the temperature gauge A are respectively arranged on one path of the coal bed gas inlet pipeline; the inlet end of the Venturi injection pipeline is respectively provided with a safety relief valve A, a manual emptying valve A and a safety relief valve root valve A, the Venturi injection pipeline comprises a Venturi injection pipeline body, a manual valve B, a pneumatic emergency stop valve, a pressure gauge B, a gas mixing chamber, a Venturi tube and an outlet manual valve, and the Venturi injection pipeline body is respectively provided with the manual valve B, the pneumatic emergency stop valve A, the pressure gauge B, the gas mixing chamber B, the Venturi tube and the outlet manual valve; the other path of the coal bed gas inlet pipeline is respectively provided with an explosion-proof methane difference meter, an explosion-proof pressure transmitter B, a pressure gauge C, an explosion-proof temperature transmitter B and a thermometer B; the coal bed gas inlet pipeline is positioned on the right side of the thermometer B and is connected with an inlet manual valve B; the rear end of the coal bed gas inlet pipeline is connected with a Venturi injection pipeline valve group, a check valve, a pneumatic emergency cut-off valve B and a manual valve A are sequentially arranged, the number of the Venturi injection pipeline valve groups is M, and M is more than or equal to 3; the venturi injection pipeline valve sets are gathered and connected with a mixed gas outlet pipeline; the methane concentration meter, the explosion-proof pressure transmitter C and the pressure gauge D are sequentially arranged on the mixed gas outlet pipeline, the safety relief valve B, the manual emptying valve B and the safety relief valve root valve B are further arranged on the mixed gas outlet pipeline, and the rear part of the mixed gas outlet pipeline is connected to an outlet pipeline through the manual valve C;

furthermore, the number of the Venturi injection pipelines is N, and N is more than or equal to 3.

The utility model has the beneficial effects that:

the utility model is a Venturi supercharged gas heat value lifting system, according to the Venturi ejector principle, the low-pressure low-concentration gas is sucked and boosted and uniformly mixed by utilizing the kinetic energy and high heat value of high-pressure high-concentration coal bed gas through a Venturi ejector device to form mixed gas with suitable pressure and heat value for a gas end, and the mixed gas is transmitted to a gas turbine for power generation through a rear-end pipe network;

the utility model relates to a Venturi supercharged gas heat value lifting system, which can match the single flow and the total injection quantity of a Venturi injection pipe according to the number of gas turbines and the total gas consumption, furthest reduces the starting and stopping frequency of a Venturi pipe under different gas consumption, improves the uniformity and the pressure stability of mixed gas, has stronger applicability compared with the conventional follow-up flow gas mixing process, reduces the fluctuation frequency of a gas source, and is more stable, more uniform and more accurate in equipment mixing especially under the working condition of small-load use;

the utility model relates to a Venturi supercharged gas heat value lifting system, which is integrated by skid-mounted equipment, has a simpler equipment process structure than the conventional follow-up flow gas mixing, high safety performance, low one-time investment, low equipment maintenance and maintenance cost and small occupied area.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model.

In the drawings:

FIG. 1 is a schematic view of the present invention.

As shown in the figure, 1-an explosion-proof pressure transmitter A, 2-a pressure gauge A, 3-an explosion-proof temperature transmitter A, 4-a thermometer A, 5-an inlet manual valve A, 6-a safety relief valve A, 7-a manual emptying valve A, 8-a safety relief valve root valve A, 9-a manual valve B, 10-a pneumatic emergency cut-off valve A, 11-a pressure gauge B, 12-a gas mixing chamber, 13-a Venturi tube, 14-an outlet manual valve, 15-a methane concentration meter, 16-an explosion-proof pressure transmitter B, 17-a pressure gauge C, 18-an explosion-proof temperature transmitter B, 19-a thermometer B, 20-an inlet manual valve B, 21-a check valve, 22-a pneumatic emergency cut-off valve B, 23-a manual valve A, 24-a mixed gas outlet pipeline, 25-methane concentration meter, 36-explosion-proof pressure transmitter C, 27-pressure meter D, 28-safety relief valve B, 29-manual emptying valve B, 30-safety relief valve root valve B and 31-manual valve C.

Detailed Description

Example 1

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The Venturi supercharged gas heat value lifting system is characterized by comprising a coal bed gas inlet pipeline, a mixed gas outlet pipeline, an explosion-proof pressure transmitter A1, a pressure gauge A2, an explosion-proof temperature transmitter A3, a thermometer A4, a Venturi injection pipeline, an explosion-proof methane differential instrument, an explosion-proof pressure transmitter B16, a pressure gauge C17, an explosion-proof temperature transmitter B18, a thermometer B19 and a Venturi injection pipeline valve group, wherein the explosion-proof pressure transmitter A1, the pressure gauge A2, the explosion-proof temperature transmitter A3 and the thermometer A4 are respectively arranged on one coal bed gas inlet pipeline, the coal bed gas inlet pipeline is positioned on the right side of the thermometer A4 and is connected with an inlet manual valve A235, and the rear end of the coal bed gas inlet pipeline is connected with the Venturi injection pipeline; the inlet end of the venturi injection pipeline is respectively provided with a safety relief valve A6, a manual emptying valve A7 and a safety relief valve root valve A8, the venturi injection pipeline comprises a venturi injection pipeline body, a manual valve B9, a pneumatic emergency cut-off valve, a pressure gauge B11, a gas mixing chamber 12, a venturi tube 13 and an outlet manual valve 14, and the venturi injection pipeline body is respectively provided with a manual valve B9, a pneumatic emergency cut-off valve A10, a pressure gauge B11, a gas mixing chamber 12B, a venturi tube 13 and an outlet manual valve 14; the other path of coal bed gas inlet pipeline is respectively provided with an explosion-proof methane difference meter, an explosion-proof pressure transmitter B16, a pressure gauge C17, an explosion-proof temperature transmitter B18 and a thermometer B19; the coal bed gas inlet pipeline is positioned on the right side of the thermometer B19 and is connected with an inlet manual valve B209; the rear end of the coal bed gas inlet pipeline is connected with a Venturi injection pipeline valve group, and the back valve 21, the pneumatic emergency cut-off valve B22 and the manual valve A23 are sequentially arranged, wherein the number of the Venturi injection pipeline valve groups is M, and M is more than or equal to 3; a plurality of venturi injection pipeline valve sets are gathered and connected with the mixed gas outlet pipeline 24; the mixed gas outlet pipeline 24 is sequentially provided with a methane concentration meter 2515, an explosion-proof pressure transmitter C36 and a pressure gauge D27, the mixed gas outlet pipeline 24 is also provided with a safety relief valve B28, a manual emptying valve B29 and a safety relief valve root valve B30, and the rear part of the mixed gas outlet pipeline 24 is connected to an outlet pipeline through a manual valve C31;

Example 2

This application utilizes the kinetic energy and the high calorific value of high pressure high concentration coal bed gas to realize sucking low-pressure low-concentration gas through venturi ejector device and step up and misce bene according to venturi ejector principle, becomes the gas mixture that pressure and calorific value suitable gas end, and this equipment passes through coal bed gas: the gas mixing ratio of 1:1 is approximately equal to gas, high-pressure (more than 0.6 MPa) high-concentration (more than 95% of methane content) coal bed gas is used as an injection gas source, after the injection gas source is sprayed out from a supersonic nozzle, negative pressure is formed in a gas mixing chamber 12, low-pressure (4KPa) low-concentration (15% of methane content) gas is sucked into the gas mixing chamber 12, the gas is mixed into uniform mixed gas with the pressure of more than 40KPa and the methane content of more than 55% through a Venturi tube 13 and is transmitted to a gas turbine for power generation through a rear-end pipe network, the sizes of the nozzle and the Venturi tube 13 under different gas mixing working conditions need to be recalculated, energy consumption is not required in the gas mixing process, and the gas mixing device is safe and reliable; the system is connected with a gas turbine, the single flow and the total injection quantity of the Venturi injection pipes can be matched according to the number of the gas turbines and the total gas consumption, the project site is three gas turbines which are one small gas turbine and two large gas turbines, the total demand of mixed gas is 15000NM3/h, the system is designed into 12 Venturi injectors with different specifications which are 1 NM3/h, 1 NM3/h, 2 NM3/h, 2 NM3/h and 6 NM3/h according to the use working condition, wherein 200NM3/h and 400NM3/h meet the ignition gas consumption, one 2000NM3/h is spare, the rest gas consumption meeting the gas consumption load when the small-flow gas turbine and the large-flow gas turbine work independently or are fully opened, the start-stop frequency of the Venturi pipe 13 is reduced to the maximum extent, the uniformity and the pressure of mixed gas are improved, the equipment is provided with a PLC electrical control cabinet, the working state of the whole gas mixing system is monitored at any time, numerical values such as temperature, pressure, concentration and gas leakage of each control point are displayed in real time and are interlocked with the pneumatic emergency cut-off valves at the inlets of the Venturi ejectors, the numerical values reach the high limit or low limit control system for audible and visual alarm, operators are prompted to process the numerical values, and if the set values exceed the limit, all the pneumatic emergency cut-off valves can be cut off in a linkage mode, so that the working safety of the system is ensured. Meanwhile, the control system can automatically open and close the corresponding Venturi tubes 13 one by one according to the set working mode of the gas turbine and the working pressure value corresponding to different working conditions, so that the optimal matching effect is achieved. The whole equipment is skid-mounted and integrated, transportation and field installation are facilitated, all electrical elements meet explosion-proof requirements, the protective box body of the skid-mounted outer cover is provided with a box door lock, a safety blow-off valve is arranged at a key position in the inner pipeline, and a blow-off outlet pipe is connected to the box body through a pipeline and a flame arrester, so that the use safety of the whole equipment is ensured.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. While the utility model has been described with respect to the above embodiments, it will be understood by those skilled in the art that the utility model is not limited to the above embodiments, which are described in the specification and illustrated only to illustrate the principles of the utility model, but that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined by the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The Venturi supercharged gas heat value lifting system is characterized by comprising a coal bed gas inlet pipeline, a mixed gas outlet pipeline, an explosion-proof pressure transmitter A, a pressure gauge A, an explosion-proof temperature transmitter A, a temperature gauge A, a Venturi injection pipeline, an explosion-proof methane difference meter, an explosion-proof pressure transmitter B, a pressure gauge C, an explosion-proof temperature transmitter B, a temperature gauge B and a Venturi injection pipeline valve group, wherein the explosion-proof pressure transmitter A, the pressure gauge A, the explosion-proof temperature transmitter A and the temperature gauge A are respectively arranged on one path of the coal bed gas inlet pipeline; the inlet end of the Venturi injection pipeline is respectively provided with a safety relief valve A, a manual emptying valve A and a safety relief valve root valve A, the Venturi injection pipeline comprises a Venturi injection pipeline body, a manual valve B, a pneumatic emergency stop valve, a pressure gauge B, a gas mixing chamber, a Venturi tube and an outlet manual valve, and the Venturi injection pipeline body is respectively provided with the manual valve B, the pneumatic emergency stop valve A, the pressure gauge B, the gas mixing chamber B, the Venturi tube and the outlet manual valve; the other path of the coal bed gas inlet pipeline is respectively provided with an explosion-proof methane difference meter, an explosion-proof pressure transmitter B, a pressure gauge C, an explosion-proof temperature transmitter B and a thermometer B; the coal bed gas inlet pipeline is positioned on the right side of the thermometer B and is connected with an inlet manual valve B; coal bed gas admission line rear end and venturi draw and penetrate pipeline valve gate group link, return valve, pneumatic emergency cut-off valve B and manual valve A in proper order, the gas mixture is given vent to anger and is equipped with methane concentration appearance, explosion-proof pressure transmitter C, manometer D on the pipeline in proper order, still be equipped with safe blowoff valve B, manual blowoff valve B and safe blowoff valve root valve B on the gas mixture gas outlet pipe way, the gas mixture gas outlet pipe way rear is connected to the outlet pipe way through manual valve C.

2. The venturi booster-type gas heat value increasing system according to claim 1, wherein the number of the venturi injection pipes is N, N being greater than or equal to 3.

3. The venturi booster-type gas heat value increasing system according to claim 1, wherein the number of the venturi injection pipeline valve sets is M, and M is greater than or equal to 3.

4. The venturi-supercharged gas heat value-increasing system according to claim 1, characterized in that a plurality of said venturi-ejector piping valve sets are connected to the mixed gas outlet piping in a collective manner.