CN103285756A

CN103285756A - Gas mixing device

Info

Publication number: CN103285756A
Application number: CN201310197637XA
Authority: CN
Inventors: 周海军; 陈哲; 李达汉; 张树森; 王秋生; 王运峰
Original assignee: China Coal Handan Design Engineering Co Ltd
Current assignee: China Coal Handan Design Engineering Co Ltd
Priority date: 2013-05-24
Filing date: 2013-05-24
Publication date: 2013-09-11

Abstract

The invention discloses a gas mixing device which mainly comprises a high-concentration gas inlet, a block valve, a pressure regulating box, a pressure regulating box with a model RX, a pressure gauge, an escape pipe, a safety valve, a flow meter, an automatic regulating valve, a temperature gauge, a concentration meter, a low-concentration gas inlet, a fire barrier, a fire barrier with a model GZDI, a check valve, a static mixer, a static mixer with a model SX, a mixed gas outlet and pipelines, wherein the high-concentration gas inlet is connected with a pipeline which is connected with the block valve; the block valve is connected with a pipeline which is connected with the pressure regulating box; the pressure regulating box is connected with a pipeline. The concentration of mixed low-concentration gas produced by the mixing device is in accordance with the standard of China, and is not within an explosion limit range of gas, so that the safety of the device is guaranteed. Compared with traditional mixing equipment such as a venturi, the gas mixing device has the advantages of being simple in process, compact in structure, low in energy consumption, less in investment, high in operation elasticity, less in maintenance load, high in reliability, low in failure rate and good in mixing performance.

Description

A kind of gas mixing arrangement

Technical field

The present invention relates to a kind of mechanical device ,Relate in particular to the mixing arrangement of mash gas extraction and ground drilling mash gas extraction or natural gas under a kind of coal mine.

Background technology

At present, China's gas pumping generally adopts dual mode: the one, and ground drilling extraction, the 2nd, coal mine gas extraction.The gas density height of ground drilling extraction can directly utilize, but the gas density of different drilling well extractions has difference, mixes the fluctuation that easily causes concentration, and utilization is had certain influence.The gas density difference of coal mine gas extraction is bigger, and what concentration was high can directly utilize, and what concentration was low then cannot directly utilize.Under safing prerequisite, how low concentration gas is mixed with the gas of high concentration, form the mist of concentration stabilize, improve the utilization rate of coal seam gas, reduce the direct discharging of gas, be the problem that urgent need will solve.

Summary of the invention

In order to overcome the deficiencies in the prior art, the gas density difference that solves the coal mine gas extraction is bigger, and what concentration was high can directly utilize, and the problem that then cannot directly utilize that concentration is low provides a kind of gas mixing arrangement.

The technical solution adopted for the present invention to solve the technical problems is:

A kind of gas mixing arrangement, mainly by the high concentration gas entrance, block valve, pressure regulating box, model pressure regulating box-RX, Pressure gauge, exhaust stack, safety valve, flowmeter, automatic regulating valve, thermometer, densimeter, the low concentration gas entrance, spark arrester, model spark arrester-GZD I, check-valves, static mixer, model static mixer-SX, mixed gas export and pipeline are formed, its high concentration gas entrance connecting pipe, pipeline connects block valve, the block valve connecting pipe, pipeline connects pressure regulating box, the pressure regulating box connecting pipe, pipeline connection traffic meter one end, set gradually Pressure gauge on pressure regulating box and the pipeline that flowmeter is connected, block valve and safety valve, the block valve top connects spark arrester, spark arrester top connects exhaust stack, the safety valve top also connects spark arrester, spark arrester top also connects exhaust stack, flowmeter other end connecting pipe, pipeline connects automatic regulating valve, automatic regulating valve is leaded up to pipeline, connect block valve, another road of automatic regulating valve connects densimeter by pipeline, densimeter connects mixed gas export by pipeline, block valve connects static mixer by pipeline, sets gradually thermometer and densimeter on block valve and the pipeline that static mixer is connected; The low concentration gas entrance connects spark arrester, check-valves, block valve and flowmeter one end successively by pipeline, the pipeline top that block valve is connected with flowmeter one end sets gradually block valve, Pressure gauge, thermometer and densimeter, block valve top connects spark arrester, spark arrester top connects exhaust stack, the flowmeter other end connects static mixer by pipeline, static mixer connects densimeter by pipeline, and densimeter connects mixed gas export by pipeline.

The invention has the beneficial effects as follows:

1, its concentration of the mixed low concentration gas of the present invention meets the regulation requirement of country, not in the gas explosion limit, has guaranteed apparatus system safety.

2, traditional mixing apparatus such as the present invention and Venturi tube etc. is compared, and it is simple to have flow process, and compact conformation, energy consumption are little, small investment, operating flexibility is big, maintenance capacity is little, reliability is high, fault rate is low, the advantage of good mixing property.

Description of drawings

Fig. 1 is gas mixing arrangement figure of the present invention.

The specific embodiment

Among Fig. 1, a kind of gas mixing arrangement, mainly by high concentration gas entrance 1, block valve 2, pressure regulating box 3, model pressure regulating box-RX, Pressure gauge 4, exhaust stack 5, safety valve 6, flowmeter 7, automatic regulating valve 8, thermometer 9, densimeter 10, low concentration gas entrance 11, spark arrester 12, model spark arrester-GZD I, check-valves 13, static mixer 14, model static mixer-SX, mixed gas export 15 and pipeline 16 are formed, its high concentration gas entrance 1 connecting pipe 16, pipeline 16 connects block valve 2, block valve 2 connecting pipes 16, pipeline 16 connects pressure regulating box 3, pressure regulating box 3 connecting pipes 16, pipeline 16 connection traffic meters 7 one ends, set gradually Pressure gauge 4 on pressure regulating box 3 and the pipeline 16 that flowmeter 7 is connected, block valve 2 and safety valve 6, block valve 2 tops connect spark arrester 12, spark arrester 12 tops connect exhaust stack 5, safety valve 6 tops also connect spark arrester 12, spark arrester 12 tops also connect exhaust stack 5, flowmeter 7 other end connecting pipes 16, pipeline 16 connects automatic regulating valve 8, automatic regulating valve 8 is leaded up to pipeline 16, connect block valve 2, automatic regulating valve 8 another roads connect densimeter 10 by pipeline 16, densimeter 10 connects mixed gas export 15 by pipeline 16, block valve 2 connects static mixers 14 by pipeline 16, sets gradually thermometer 9 and densimeter 10 on block valve 2 and the pipeline 16 that static mixer 14 is connected; Low concentration gas entrance 11 connects spark arrester 12, check-valves 13, block valve 2 and flowmeter 7 one ends successively by pipeline 16, pipeline 16 tops that block valve 2 is connected with flowmeter 7 one ends set gradually block valve 2, Pressure gauge 4, thermometer 9 and densimeter 10, block valve 2 tops connect spark arrester 12, spark arrester 12 tops connect exhaust stack 5, flowmeter 7 other ends connect static mixer 14 by pipeline 16, static mixer 14 connects densimeter 10 by pipeline 16, and densimeter 10 connects mixed gas export 15 by pipeline 16.

Operation principle:

High concentration gas (gas, natural gas that the concentration of the gas of ground extraction, down-hole extraction is higher), by pressure regulating box 3 backs (arranging according to the pressure rating needs), after flowmeter 7 meterings, enter automatic regulating valve 8, through the high concentration gas behind the automatic regulating valve 8, enter static mixer 14, wait for and fully mixing with low concentration gas.

The low concentration gas of extraction under the coal mine behind spark arrester 12, check-valves 13, through flowmeter 7, enters static mixer 14, and low concentration gas and high concentration gas converge.

Be provided with measurement of concetration meter 10 behind the static mixer 14, according to the concentration that arranges, automatic regulating valve 8 in the control high concentration gas pipe, adjust the unlatching size of automatic regulating valve 8, the flow of control high concentration gas, mixed gas density is maintained in the scope of setting, satisfy user's instructions for use.

For guaranteeing safety, in the high concentration gas pipeline, be provided with safe bleeding device exhaust stack 5 and safety valve 6; On the low concentration gas pipeline, be provided with safe bleeding device exhaust stack 5; The ducted gas density of low concentration gas is controlled abovely reaching the standard grade of the gas explosion limit, guarantees the safety of low concentration gas pipeline.

Claims

1. gas mixing arrangement, mainly by high concentration gas entrance (1), block valve (2), pressure regulating box (3), model pressure regulating box-RX, Pressure gauge (4), exhaust stack (5), safety valve (6), flowmeter (7), automatic regulating valve (8), thermometer (9), densimeter (10), low concentration gas entrance (11), spark arrester (12), model spark arrester-GZD I, check-valves (13), static mixer (14), model static mixer-SX, mixed gas export (15) and pipeline (16) are formed, it is characterized in that: high concentration gas entrance (1) connecting pipe (16), pipeline (16) connects block valve (2), block valve (2) connecting pipe (16), pipeline (16) connects pressure regulating box (3), pressure regulating box (3) connecting pipe (16), pipeline (16) connection traffic meter (7) one ends, set gradually Pressure gauge (4) on pressure regulating box (3) and the pipeline (16) that flowmeter (7) is connected, block valve (2) and safety valve (6), block valve (2) top connects spark arrester (12), spark arrester (12) top connects exhaust stack (5), safety valve (6) top also connects spark arrester (12), spark arrester (12) top also connects exhaust stack (5), flowmeter (7) other end connecting pipe (16), pipeline (16) connects automatic regulating valve (8), automatic regulating valve (8) is leaded up to pipeline (16), connect block valve (2), another road of automatic regulating valve (8) connects densimeter (10) by pipeline (16), densimeter (10) connects mixed gas export (15) by pipeline (16), block valve (2) connects static mixer (14) by pipeline (16), sets gradually thermometer (9) and densimeter (10) on block valve (2) and the pipeline (16) that static mixer (14) is connected; Low concentration gas entrance (11) connects spark arrester (12) successively by pipeline (16), check-valves (13), block valve (2) and flowmeter (7) one ends, pipeline (16) top that block valve (2) is connected with flowmeter (7) one ends sets gradually block valve (2), Pressure gauge (4), thermometer (9) and densimeter (10), block valve (2) top connects spark arrester (12), spark arrester (12) top connects exhaust stack (5), flowmeter (7) other end connects static mixer (14) by pipeline (16), static mixer (14) connects densimeter (10) by pipeline (16), and densimeter (10) connects mixed gas export (15) by pipeline (16).