CN101477130A - Gas analysis pretreatment system - Google Patents
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- CN101477130A CN101477130A CNA2009100055728A CN200910005572A CN101477130A CN 101477130 A CN101477130 A CN 101477130A CN A2009100055728 A CNA2009100055728 A CN A2009100055728A CN 200910005572 A CN200910005572 A CN 200910005572A CN 101477130 A CN101477130 A CN 101477130A
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Abstract
The invention discloses a gas analysis and pretreatment system, which comprises a control device and a plurality of gas analysis and pretreatment devices, wherein sampling gas outlet pipes of each gas analysis and pretreatment device are communicated through a main pipe, and sampling gas inlet pipes or/and the sampling gas outlet pipes of each gas analysis and pretreatment device are provided with valves. The control device is used for controlling the on-off of the sampling gas inlet pipes or/and the sampling gas outlet pipe valves so as to ensure that current sample gas which is treated only by one gas analysis and pretreatment device can be sent into the main pipe. The system can pretreat the sample gas of various sampling points, and the whole system is compact and small, and easy to install and operate.
Description
Technical field
The present invention relates to chemical field, particularly gas analysis pretreatment system.
Background technology
The Main Ingredients and Appearance of coal gasifying generating furnace institute producing coal gas sample gas is: carbon dioxide, oxygen, carbon monoxide, hydrogen, methane wherein also comprise micro-sulfuretted hydrogen (H
2S), impurity such as dust, moisture and tar, H
2S can corrode sampling pipe for a long time, and tar and dust also can block stopple coupon for a long time down, these impurity also cause certain interference to the accuracy of the online detection of gas composition simultaneously, therefore, to the cooling of coal gas sample gas, step-down, and remove wherein impurity, have crucial effects for obtaining accurate online analysis of components data in the coal gasification processes.
In order fully to understand the response situation of gasification furnace inside, a plurality of sampled points being set on gasification furnace and carrying out online monitoring is unusual valid approach, difference according to gasification furnace internal reaction condition (temperature, pressure), at diverse location sampled point is set, collect the proportion of composing of the product under the different operating modes, this requires the infrared analysis system can purify a plurality of sampled points simultaneously, also can not cause the complicated huge of the mutual hybrid system of gas.
In the gas analysis pretreatment unit that existing patent CN200320107425.X is mentioned, carry out cooling, desulfurization, dedusting, the decoking wet goods process of coal gas sample gas respectively by different devices and container, just enter analytic system through two-stage water washing device and temperature control device, though these device parts have solved the impure problem of tested gas, but have following problem in practical operation: 1, pretreatment process is long, and operation link is many; 2, this covering device can only be gathered the sample gas of a sampling spot, and device pipeline complexity, and equipment limitation is big.
Summary of the invention
The embodiment of the invention provides gas analysis pretreatment system, handles to realize multiple spot gas sampling and pre-service.
The gas analysis pretreatment system that the embodiment of the invention provides comprises:
Control device and a plurality of gas analysis pretreatment unit, the sampling gas escape pipe of each gas analysis pretreatment unit is communicated with by house steward, and the sampling gas draft tube of each gas analysis pretreatment unit is or/and sampling gas escape pipe is provided with valve; Described control device is used to control described sampling gas draft tube or/and the opening and closing of sampling gas escape pipe valve, and making currently only has the sample gas after a gas analysis pretreatment unit is handled can send into described house steward.
The above embodiment of the present invention, by corresponding each sampled point the gas analysis pretreatment unit is set respectively, by control device to the draft tube of the gas analysis pretreatment unit of each sampled point or/and the valve on the escape pipe control, making currently only has sample gas after gas analysis pretreatment unit is handled can send into house steward in this system, so that send into gas analysis system, thereby realized the sample gas of many sampled points is carried out pre-service by house steward.
The another kind of gas analysis pretreatment system that the embodiment of the invention provides comprises: control device, gas analysis pretreatment unit, the house steward who is communicated with the draft tube of gas analyzing apparatus, and the snorkel of each sampled point that is communicated with house steward; The snorkel of each sampled point is provided with valve; Described control device is used to control the opening and closing of described valve, makes the current sample gas that a sampled point only arranged send into described gas analysis pretreatment unit by snorkel through house steward and handles.
The above embodiment of the present invention, by corresponding each sampled point snorkel is set respectively, make the sample gas of each sampled point be sent to the gas analysis pretreatment unit by snorkel and the house steward who is communicated with snorkel, and the valve of the snorkel of each sampled point is controlled by control device, make the current snorkel that a sampled point only arranged the sampling pneumatic transmission can be gone into house steward, the gas analysis pretreatment unit is current can only to carry out pre-service to the sample gas that a sampled point is sent into thereby make, thereby can realize the sample gas of many sampled points is carried out pre-service.Owing to only comprise a gas analysis pretreatment unit in this system, thereby can further reduce generation, installation and maintenance cost.
Description of drawings
The right section synoptic diagram of the water washing device in the gas analysis pretreatment unit that Fig. 1 provides for the embodiment of the invention;
Fig. 2 is the vertical view of water washing device shown in Figure 1;
Fig. 3 is the cooling water outlet in the water washing device shown in Figure 1, the synoptic diagram of water inlet;
Fig. 4 is the liquid level gauge scheme of installation in the water washing device shown in Figure 1;
One of structural representation of the gas analysis pretreatment system that Fig. 5 provides for the embodiment of the invention;
Two of the structural representation of the gas analysis pretreatment system that Fig. 6 provides for the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the invention is described in detail.
Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, be respectively right section synoptic diagram, vertical view and the partial schematic diagram of the gas analysis pretreatment unit that the embodiment of the invention provides.This gas analysis pretreatment unit comprises water washing device, water washing device is the double-layer seal container, as jar shape airtight container, tank top and bottom are that solid wall, a jar week are the double wall that is made of inwall 6 and outer wall 7, inwall 6 and outer wall 7 are divided into jar inner sealing cavity that inwall 6 surrounded and the interlayer sealed cavity between the double wall with the internal cavities of jar shape airtight container, wherein, jar inner sealing cavity is used for the coal gas filtered fluid that splendid attire can filter coal gas impurity, as lime water, the interlayer sealed cavity is used for the cooling liquid that splendid attire chilled water etc. can be lowered the temperature.The tank top has coal gas filtered fluid water inlet, pot bottom has coal gas filtered fluid water delivering orifice, the rising pipe that is installed in the water inlet pipe of coal gas filtered fluid water inlet and is installed on the coal gas filtered fluid water delivering orifice is communicated with the jar inner sealing cavity that jar inwall 6 is surrounded respectively, lime water can be injected into a jar inner sealing cavity by this water inlet pipe, water level is located to be advisable with about 2/3 of can body height, when treating the filtration reduction of lime water, it can be discharged from this rising pipe.The tank top has gas inlet and coal gas gas outlet, the coal gas escape pipe 8 that is installed in the gas inlet pipe 3 on the gas inlet and is installed on the coal gas gas outlet is communicated with the jar inner sealing cavity that inwall 6 is surrounded respectively, gas inlet pipe 3 may extend into the inner segment length of sealed cavity, preferably extend to the lime underwater, thereby make coal gas sample gas inject lime water from gas inlet pipe 3, fully mix with lime water, react to remove impurity, the coal gas sample gas after the filtration is discharged to the gas analysis system from coal gas escape pipe 8.
Have cooling water intake and cooling water outlet on the tank wall 7, be installed in the cooling water inlet pipe 12 on the cooling water intake and be installed on the cooling water outlet cooling water outlet pipe 14 respectively with double wall between the interlayer sealed cavity be communicated with, chilled water can be by the cavity between cooling water inlet pipe 12 injection outer walls 7 and the inwall 6, discharge by cooling water outlet pipe 14, thereby play the effect that the coal gas after water washing device and the filtration is cooled by circulating of chilled water.Cooling water intake and cooling water outlet can be opened respectively in the both sides of tank wall 7, and the position of cooling water intake is lower than cooling water outlet, like this, the chilled water and inwall 6 outsides fully contacted with the raising effect that cools.Owing to can produce a large amount of heats when utilizing impurity in lime water and the coal gas sample gas to carry out chemical reaction with filtration coal gas impurity, thereby can improve the temperature of water washing device and coal gas sample gas, all unfavorable to life-span of water washing device and follow-up analyzing and testing like this to coal gas sample gas, therefore, said structure by water washing device can play the effect of cooling when filtering coal gas sample gas, and, coal gas sample gas filtration and cooling structure are co-located on the water washing device, can save the manufacturing cost of gas analysis pretreatment unit, and easy for installation.
Preferable, can be in tank top center position perforate, as the water inlet of coal gas filtered fluid, the pot bottom perforate is as the water delivering orifice of coal gas filtered fluid.The water inlet of coal gas filtered fluid links to each other with steel pipe as water inlet pipe through welding manner or other fixedly connected modes, and welding flange 11 on the steel pipe, manual ball valve 10 are set with the control water inlet behind the flange 11; The water delivering orifice of coal gas filtered fluid links to each other with steel pipe as rising pipe through welding manner or other fixedly connected modes, and welding flange 5 on the steel pipe, manual ball valve 4 are set with the control draining behind the flange 5.Can be in perforate on the pipeline between tank deck and the flange 11 on the coal gas filtered fluid water inlet pipe, welded still pipe on this hole, last connection orchid 9 is as coal gas escape pipe 8.Can be in the off-center position perforate of water washing device tank top, as gas inlet, and link to each other with gas inlet pipe 3 through welding manner or other fixedly connected modes, gas inlet pipe 3 welding flanges 2 also can be provided with manual ball valve 1 with the control air inlet behind the flange 2.Also manual ball valve can be set similarly on the coal gas escape pipe 8.Above-mentioned manual ball valve also can replace with remote controlled valve or other forms of valves such as pneumatic ball valves.
Preferable, filtration unit (not illustrating in the drawings) is set in the inner sealing cavity of water washing tank, as is arranged on the subsurface flat screen pack of lime water, but this screen pack basic horizontal is placed, when coal gas sample gas was discharged from lime water, this screen pack can filter impurity such as part tar.This filtration unit can also be double-deck flat screen pack, wherein one deck screen pack is positioned under the lime water liquid level, its effect is the same, and another layer screen pack is positioned on the lime water liquid level, can filter out the impurity such as tar of the part gaseous state shape from the sample gas that lime water is discharged.Its mesh of screen pack that is positioned on the liquid level can be little with respect to subsurface mesh, so that the little gaseous state tar of specific filtration resistance tar liquid volume.
Preferable, the outside of water washing device is provided with liquid level gauge 13, and liquid level gauge 13 adopts the linker structure, and promptly top and bottom are communicated with the jar inner sealing cavity that inwall 6 is surrounded respectively, be used for observing the liquid level of the lime water in the cavity, thereby can make the lime water of injection not have the port of gas inlet pipe 3.
In order to improve pressure withstanding degree, water washing device can be made column type canning sealing container, vault is done in tank top and bottom, the outer wall 7 and the inwall 6 in jar week are made double-deck annular wall.The material of water washing device can be carbon steel or stainless steel, or other materials of this area use.Package unit compressive resistance height, high temperature resistant, corrosion-resistant, be applicable to gas collection of coal gas sample and pre-service under the multiple gasification environment.
According to the type of handled sample gas or the content of its various compositions, also one or more levels filtration unit can be set behind water washing device.In the gas analysis pretreatment unit that another embodiment of the present invention provides, after water washing device, also can be connected with a filtration unit by the coal gas escape pipe 8 of water washing device.This filtration unit comprises airtight container and connected draft tube and escape pipe, and the draft tube of filtration unit is connected with the coal gas escape pipe 8 of water washing device, and escape pipe is connected with the gas analysis system.In the airtight container of filtration unit filtered fluid is housed, as water or phenixin etc.Draft tube extend under the filtered fluid liquid level, the further filtering of tar ingredients in the coal gas sample gas that water washing device can be sent.The airtight container top of this filtration unit also can be provided with water inlet pipe, the bottom is provided with rising pipe, so that the filtered fluid eliminating of sending into filtered fluid and filter efficacy is reduced in container.The structure of this filtration unit can be similar with water washing device, and its container is double-layer seal container also, thereby can carry out heat interchange in the impurity in filtering sample gas.According to the type of handled sample gas or the content of its various compositions, more multistage filtration unit can be set behind this filtration unit, as the device that uses fabric filter element that gas is filtered is set.
The dry filter device also is a kind of of filtration unit, can reduce or remove the liquid water content of sample gas.In the gas analysis pretreatment unit that another embodiment of the present invention provides, after water washing device, also can be connected with the dry filter device by the coal gas escape pipe 8 of water washing device, the dry filter device comprises airtight container and draft tube that is communicated with it and escape pipe, the draft tube of dry filter device is connected with the coal gas escape pipe 8 of water washing device, and the escape pipe of dry filter device is connected with the gas analysis system.In the airtight container of dry filter device drying agent is housed, three layers of solid reagent, comprise soda-lime, coke grain and iron oxide, these three kinds of filtering agents can be removed the moisture in the coal gas gas on the one hand, it also can further filter out tar and sulfurous gas remaining in the gas, reaches the purpose of coal gas double purification.The dry filter device is arranged on after the every other filtration unit usually, that is, the sample gas after the drying filtration unit is handled directly is admitted to the gas analysis system.
The gas analysis pretreatment unit that adopts the embodiment of the invention to provide carries out the process that coal gas filters, and can comprise:
Coal gas sampling gas is passed in the lime water in the water washing device jar by draft tube 3 by the manual ball valve 1 often opened, and sampling gas is by behind the low temperature lime water, and the temperature of sampling gas descends, the micro-H in sampling pneumatolytic part
2S and other sour gas are dissolved in the lime water, a small amount of tar in the sampling gas is condensed into drop and is trapped in the lime water upper strata after temperature reduces, the part dust granule also can be residual in lime water, sampling gas is through after the washing, overflow by coal gas escape pipe 8, and finally enter the gas analysis system by the dry filter device.Lime water in the water washing device is sent in the water washing device jar after can opening by manual ball valve 10, and the lime water of inefficacy is then discharged by the manual ball valve of opening 4, and the lime water liquid level can be measured by liquid level gauge 13.In the interlayer of inside and outside wall, feed and discharge chilled water by cooling water inlet pipe 12 and cooling water outlet tube 14 circulations.
Need to prove that the top of above-mentioned water washing device and bottom also can be double walls, that is, this water washing device is nested to form by 2 airtight containers.
For the demand of gathering coal gas sample gas at a plurality of sampled points, the embodiment of the invention also provides a kind of gas analysis pretreatment system.
Referring to Fig. 5, the structural representation of the gas analysis pretreatment system that provides for the embodiment of the invention.This system comprises a plurality of gas analysis pretreatment units, and the structure of these gas analysis pretreatment units can be as shown in Figure 1.These gas analysis pretreatment units are separately positioned on each coal gas sampled point.Be provided with pneumatic ball valve 15 behind the flange 9 of the coal gas escape pipe 8 of water washing device in these gas analysis pretreatment units, the coal gas escape pipe behind the pneumatic ball valve 15 is connected to house steward 16, and house steward 16 is connected with analytic system (being the gas analysis system).This system also comprises control device, control device respectively with the pneumatic ball valve 1 of each water washing device or/and pneumatic ball valve 15 be connected, with the open and close of control control pneumatic ball valve.
Preferable, also be connected with one or more levels filtration unit between house steward 16 and the analytic system.If be connected with the one-level filtration unit, then the draft tube of this filtration unit is communicated with house steward 16, and escape pipe is communicated with analytic system; If be connected with the cascade filtration device, then wherein the draft tube of the filtration unit of the first order is communicated with house steward 16, and the draft tube of all the other filtration units is communicated with the escape pipe of previous stage filtration unit, and the escape pipe of the filtration unit of afterbody is communicated with analytic system.Only show the situation that is connected with the dry filter device among the figure, the structure of this dry filter device and effect can be as previously mentioned.Front end in the draft tube of dry filter device also can be provided with reduction valve 17.
Preferable, also have the water vapour draft tube 18 and the water vapour escape pipe that are communicated with it on the house steward 16, as drench 19.Preferable, the direction that the coal gas sample gas of sending according to each gas analysis pretreatment unit is flowed through house steward 16, the coal gas escape pipe 8 that water vapour draft tube 18 is arranged at all gas analysis pretreatment units is with after house steward 16 is communicated with the place, before drenching the 19 coal gas escape pipes 8 that are arranged at all gas analysis pretreatment units and house steward 16 being communicated with the place, vice versa.Water vapour draft tube 18 and drench on 19 and can be provided with pneumatic ball valve.Water vapour can be sent into by water vapour draft tube 18, and discharge from drenching 19 house steward 16 backs of flowing through.Like this, gas analysis pretreatment unit in each sampling process can be retained in impurity such as ducted coal gas or tar and blow out, thereby in the process of repeatedly sampling, can not cause the interference of gas composition, preferable, the water vapour gas outlet is downward, so that the impurity that blowback goes out is discharged.In this process, reduction valve 17 can be in closed condition, enters the dry filter device to prevent water steam.
Control device can be located in the analytic system, can be according to the gas pressure of sampled point, the pipe diameter of the gas inlet pipe 3 of each gas analysis pretreatment unit, sampled point number and sampling request, pass through airshed and the gas analysis pretreatment unit that calculate each sampled point are finished once sampling and needed time of pre-service, and the order of the sample gas of each sampled point collection being carried out analyzing and processing, thereby can set each sampled point the gas analysis pretreatment unit opening sequence and carry out the coal gas sampling and the pretreated time interval, control each gas analysis pretreatment unit as control device and carry out coal gas sample gas and gather and pretreated foundation.
If the gas analysis pretreatment unit of each sampled point is finished once sampling and the pretreated time is 4 minutes, the process of finishing water vapour blowback processing is 1 minute, and consider that opening and close the required time of pneumatic ball valve is 0.5 minute, to control 3 gas analysis pretreatment units is example, the gas analysis pretreatment system that then adopts the embodiment of the invention to provide carries out the process that coal gas filters, and can comprise:
Start-up control device, control device are closed the pneumatic ball valve 15 of the 2nd and the 3rd gas analysis pretreatment unit, open the pneumatic ball valve 15 of the 1st gas analysis pretreatment unit;
The 0.5th minute, the pneumatic ball valve 15 of the 2nd and the 3rd gas analysis pretreatment unit was closed, and the pneumatic ball valve 15 of the 1st gas analysis pretreatment unit is opened.Like this, the 1st gas analysis pretreatment unit carries out coal gas sampling and pre-service, in this process, coal gas sampling gas is through the pneumatic ball valve 15 of the 1st gas analysis pretreatment unit, enter house steward 16 by water washing device escape pipe 8 roads, enter by the reduction valve of often opening 17 in the dry filter device of filling soda-lime dry, further filter out remaining micro-tar after, coal gas sample pneumatic transmission is gone into analytic system (as infrared spectrum analyser, oxygen in-line analyzer etc.);
The 4.5th minute, control device cut out the pneumatic ball valve 15 of the 1st gas analysis pretreatment unit, and the steam inlet duct 18 and drench 19 pneumatic ball valve of fetching boiling water is sent into water vapour by water vapour draft tube 18 and carried out the steam blowback; Water vapour pressure is 0.5-1MPa;
The 5th minute, control device cut out water vapour draft tube 18 and drenches 19 pneumatic ball valve, stops the steam blowback, opened the pneumatic ball valve 15 of the 2nd gas analysis pretreatment unit;
The 5.5th minute, the pneumatic ball valve 15 of the 1st and the 3rd gas analysis pretreatment unit is closed, the pneumatic ball valve 15 of the 2nd gas analysis pretreatment unit is opened, the 2nd gas analysis pretreatment unit begins sampled point 2 is carried out the gas collection of coal gas sample and the sample gas that collects is carried out pre-service, and sends into analytic system;
The 9.5th minute, control device cut out the pneumatic ball valve 15 of the 2nd gas analysis pretreatment unit, and the steam inlet duct 18 and drench 19 pneumatic ball valve of fetching boiling water is sent into water vapour by water vapour draft tube 18 and carried out the steam blowback;
The 10.5th minute, control device cut out water vapour draft tube 18 and drenches 19 pneumatic ball valve, stops the steam blowback, opened the pneumatic ball valve 15 of the 3rd gas analysis pretreatment unit;
By that analogy, control the opening and closing of the pneumatic ball valve of each gas analysis pretreatment unit respectively by control device, thereby sampling, the blowback of control gas analysis pretreatment system and close, according to different given interval time of sequential sampling, each sampled point is carried out the round-robin sampling successively, analyzes then.Coal gas after the sampling imports total pipeline, further removes tar through sending into the dry filter device behind the reduction valve, sends into analytic system then.Carry out the steam blowback after the each sampling of each sampled point finishes, can guarantee that the different mining sampling point gathers the accuracy of coal gas composition on-line analysis.
Generally speaking, in steam blowback process, the pneumatic ball valve 15 of gas analysis pretreatment unit is closed, but after the gas analysis pretreatment unit has moved a period of time, when carrying out the steam blowback, can turn on the gas-fire and analyze the pneumatic ball valve 15 of pretreatment unit, utilize the water vapour purge to remain in this device the tar of (as inwall or/and screen pack).
The coal gas sampling that control device is realized each gas analysis pretreatment unit except the pneumatic ball valve 15 of coal gas escape pipe 8 that can be by control gas analysis pretreatment unit and the pretreatment operation, the pneumatic ball valve 1 that also can pass through the gas inlet pipe 3 of control gas analysis pretreatment unit is realized the coal gas sampling and the pretreatment operation of each gas analysis pretreatment unit, and its control procedure and above-mentioned flow process are similar.Control device can also be by controlling the gas analysis pretreatment unit simultaneously the pneumatic ball valve 15 of coal gas escape pipe 8, and the pneumatic ball valve 1 of gas inlet pipe 3 is realized the coal gas sampling and the pretreatment operation of each gas analysis pretreatment unit.
Need to prove that the result of the gas analysis pretreatment unit in the system shown in Figure 5 can promptly comprise one or more levels filtration unit as previously mentioned behind water washing device.When being provided with the one-level filtration unit, the draft tube of this filtration unit is communicated with the escape pipe of water washing device, and the escape pipe of this filtration unit is communicated with house steward 16; When being provided with the cascade filtration device, wherein the draft tube of the filtration unit of the first order is communicated with the escape pipe of water washing device, the draft tube of all the other filtration units is communicated with the escape pipe of previous stage filtration unit, and the escape pipe of the filtration unit of afterbody is communicated with house steward 16.
Further gas analysis pretreatment system shown in Figure 5 is improved, can obtain the another kind of gas analysis pretreatment system that the embodiment of the invention provides.
Fig. 6 has provided the synoptic diagram of the gas analysis pretreatment system after improving, wherein, include only a cover gas analysis pretreatment unit (details of not shown this device among Fig. 6), the escape pipe of this device is communicated with the draft tube of analytic system (being the gas analysis system), the draft tube of this device is communicated with a house steward 61, and the coal gas sample gas of each sampled point is sent to this house steward 61 by the gas collecting device and the snorkel 62 of each sampled point.Be respectively arranged with pneumatic ball valve 63 on each sampled point snorkel 62, the switch of these pneumatic ball valves can not controlled by control device (illustrating in the drawings).Preferable, on house steward 61, also be communicated with water vapour draft tube 64 and escape pipe 66, draft tube 64 is provided with pneumatic ball valve 65, escape pipe 66 is provided with pneumatic ball valve 67, pneumatic ball valve 65 and 67 switch are controlled by control device, thereby realize the water vapour blowback, so that residual sample gas among the house steward 61 and residuals are removed, with the accuracy that guarantees each sampling point sample gas is analyzed, at this moment, also need pneumatic ball valve 68 be set on the snorkel of gas analysis pretreatment unit, the switch of this ball valve also need be controlled by control device, guarantee that when carrying out the water vapour blowback, water vapour can not be fed to the gas analysis pretreatment unit.Preferable, water vapour draft tube 64 and escape pipe 66 are arranged at all sampled point snorkels 62 are communicated with part with house steward 61 both sides, to improve the effect of blowback.
Equally, if the gas analysis pretreatment unit of each sampled point is finished once sampling and the pretreated time is 4 minutes, the process of finishing water vapour blowback processing is 1 minute, and consider that opening and close the required time of pneumatic ball valve is 0.5 minute, respectively the sample gas of 3 coal gas sampled points is analyzed is example, then adopt gas analysis pretreatment system shown in Figure 6 to carry out the pretreated process of coal gas, can comprise:
Start-up control device, control device are closed the pneumatic ball valve 63 on the 2nd and the 3rd the sampled point snorkel 62, open the 1st pneumatic ball valve 63 on the sampled point snorkel 62;
The 0.5th minute, the pneumatic ball valve 63 on the 2nd and the 3rd the sampled point snorkel 62 was closed, and the pneumatic ball valve 63 on the 1st sampled point snorkel 62 is opened.Like this, the coal gas sample gas of the 1st sampled point is admitted to house steward 61, and send into the gas analysis pretreatment unit through the draft tube of house steward 61, gas analysis pretreatment unit and carry out pre-service, the pneumatic ball valve 68 of this moment is that open mode, pneumatic ball valve 65 and 67 are closed condition.Pretreated sample gas is admitted to analytic system and carries out analyzing and processing;
The 4.5th minute, control device cuts out the pneumatic ball valve 68 on the draft tube of gas analysis pretreatment unit, close the 1st pneumatic ball valve 63 on the sampled point snorkel 62, the pneumatic ball valve 65 and 67 on steam inlet duct 64 and the escape pipe 66 of fetching boiling water is sent into water vapour by water vapour draft tube 64 house steward 61 is carried out the steam blowback;
The 5th minute, control device cut out the pneumatic ball valve 65 and 67 on water vapour draft tube 64 and the escape pipe 66, stops the steam blowback, opened the 2nd pneumatic ball valve 63 on the sampled point snorkel 62, and opened pneumatic ball valve 68;
The 5.5th minute, pneumatic ball valve 63 on the 1st and the 3rd the sampled point snorkel 62 is closed, pneumatic ball valve 63 on the 2nd sampled point snorkel 62 is opened, pneumatic ball valve 68 is opened, the sample gas of the 2nd sampled point is admitted to the gas analysis pretreatment unit and carries out pre-service, and sends into analytic system after processing;
The 9.5th minute, control device cut out pneumatic ball valve 68, closed the 2nd pneumatic ball valve 63 on the sampled point snorkel 62, and the pneumatic ball valve 65 and 67 of fetch boiling water steam inlet duct 64 and escape pipe 66 is sent into water vapour by water vapour draft tube 64 and carried out the steam blowback;
The 10.5th minute, control device cut out the pneumatic ball valve 65 and 67 on water vapour draft tube 64 and the escape pipe 66, stops the steam blowback; And open the 3rd pneumatic ball valve 63 on the sampled point snorkel 62;
By that analogy, control the opening and closing of the pneumatic ball valve on each sampled point snorkel respectively, thereby control gas analysis pretreatment system circulates successively to the sample gas of each sampled point collection and carries out pre-service by control device.Sample gas to each sampled point carries out after the pre-service house steward being carried out the steam blowback, can guarantee that the different mining sampling point gathers the accuracy of coal gas composition on-line analysis.Generally speaking, in steam blowback process, the pneumatic ball valve 68 of gas analysis pretreatment unit is closed, but after the gas analysis pretreatment unit has moved a period of time, when carrying out the steam blowback, can turn on the gas-fire and analyze the pneumatic ball valve 68 of pretreatment unit, utilize the water vapour purge to remain in tar in this device.Because this system uses a cover gas analysis pretreatment unit, then can reduce production, maintenance cost.In addition, when the sample gas of different mining sampling point was analyzed, the gas displacement time can be not long, thereby improved the instantaneity of gas componant.
Need to prove, also can be provided with one or more levels filtration unit in the gas analysis pretreatment unit among Fig. 6.When being provided with the one-level filtration unit, the draft tube of this filtration unit is communicated with the escape pipe of water washing device; When being provided with the cascade filtration device, wherein the draft tube of the filtration unit of the first order is communicated with the escape pipe of water washing device, the draft tube of all the other filtration units is communicated with the escape pipe of previous stage filtration unit, and the escape pipe of the filtration unit of afterbody is connected with analytic system.
Pneumatic ball valve in the embodiment of the invention also can replace with the valve of other types.
By above description as can be seen, the water washing device of the gas analysis pretreatment unit that the embodiment of the invention provides is designed to the water leg form, built-in recirculated water, so both can play the effect of refrigerating gas, can make the water in the internal layer jar obtain cooling again, and water is in recurrent state, can not cause waste, and is energy-saving and cost-reducing.The cooling of water washing device collection, dedusting, remove H
2S, remove tar, avoided that the gas washing flow process is long, device connects loaded down with trivial details, lime water and change shortcomings such as frequent in one, reach save time, laborsaving, easy-operating advantage.Water washing device is small and exquisite succinct, and floor area is little, is convenient to install; Gas analysis pretreatment unit for a plurality of sampled point samplings can be installed simultaneously, purifies the point sample gas of respectively sampling respectively, by each sampled point coal gas composition of control device control sequence collection analysis.Except that minority water inlet, sewage draining valve (as the water inlet and the water discharging valve of lime water) adopt manual ball valve; gas analysis pretreatment unit or the valve that system adopted all can adopt pneumatic ball valve control; this is in the workload that has at utmost reduced the site operation personnel; the working time of minimizing under high-risk environment; realize sampling and blowback by control device; can increase work efficiency, guarantee safety in production.In addition, gas analysis pretreatment unit or system equipment that the embodiment of the invention provides are simple, and except that water washing tank, other equipment all can not have electric equipment away from operation site, can reach the requirement of higher explosive-proof grade.
Also need to prove, pre-service for other sample gas, the similar structure of gas analysis pretreatment unit that provides with the embodiment of the invention also can be provided, in addition, for the situation of the many sampled points of needs, also can adopt the similar structure of gas analysis pretreatment system and the treatment scheme that are provided with the embodiment of the invention.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (19)
1, a kind of gas analysis pretreatment system, it is characterized in that, comprise: control device and a plurality of gas analysis pretreatment unit, the sampling gas escape pipe of each gas analysis pretreatment unit is communicated with by house steward, and the sampling gas draft tube of each gas analysis pretreatment unit is or/and sampling gas escape pipe is provided with valve; Described control device is used to control described sampling gas draft tube or/and the opening and closing of sampling gas escape pipe valve, and making currently only has the sample gas after a gas analysis pretreatment unit is handled can send into described house steward.
2, gas analysis pretreatment system as claimed in claim 1, it is characterized in that, described control device is according to the opening sequence and the processing time of each default gas analysis pretreatment unit, and the sample gas draft tube of opening each gas analysis pretreatment unit in turn is or/and the valve of sample gas escape pipe.
3, gas analysis pretreatment system as claimed in claim 1 is characterized in that, described house steward also is provided with water vapour draft tube and the water vapour escape pipe that is communicated with it, and described water vapour draft tube and escape pipe are respectively equipped with valve; Described control device is by the opening and closing of the valve of control described water vapour draft tube and escape pipe, the water vapour of sending into from described water vapour draft tube flowed through discharge from described water vapour escape pipe behind the described house steward.
4, gas analysis pretreatment system as claimed in claim 3, it is characterized in that, the direction that the sample gas of sending according to each gas analysis pretreatment unit is flowed through in described house steward, after described water vapour draft tube was arranged at sample gas escape pipe that all gas analyzes pretreatment unit and described house steward is communicated with the place, the sample gas escape pipe that described water vapour escape pipe is arranged at all gas analysis pretreatment unit was with before described house steward is communicated with the place.
5, gas analysis pretreatment system as claimed in claim 1, it is characterized in that, the direction that the sample gas of sending according to each gas analysis pretreatment unit is flowed through in described house steward, with after described house steward is communicated with the place, one or more levels filtration unit is set also at sample gas escape pipe that all gas is analyzed pretreatment unit;
When being provided with the one-level filtration unit, the draft tube of this filtration unit is communicated with described house steward;
When being provided with the cascade filtration device, wherein the draft tube of the filtration unit of the first order is communicated with described house steward, and the draft tube of all the other filtration units is communicated with the escape pipe of previous stage filtration unit.
6, gas analysis pretreatment system as claimed in claim 1 is characterized in that, described gas analysis pretreatment unit comprises: water washing device is located at sampling gas draft tube and escape pipe, gas filtration liquid water inlet pipe and rising pipe on this water washing device; Wherein, described water washing device is the double-layer seal container, container outer wall is provided with water inlet and water delivering orifice, the pipeline that is located on this water inlet and the water delivering orifice is communicated with the outer sealed container interior of described double-layer seal container, is used for sending into chilled water and it being discharged to carry out heat interchange to this skin sealed container interior.
7, gas analysis pretreatment system as claimed in claim 6 is characterized in that, is provided with double-layer filtering net in the internal container of described water washing device, and wherein one deck is positioned under the liquid level, and another layer is positioned on the liquid level.
8, gas analysis pretreatment system as claimed in claim 6 is characterized in that, described double-layer seal container is a tank container, and tank top and pot bottom are vaulted solid wall, and a jar week constitutes double wall by outer wall and inwall.
9, gas analysis pretreatment system as claimed in claim 6 is characterized in that, described gas analysis pretreatment unit also is provided with one or more levels filtration unit;
When being provided with the one-level filtration unit, the draft tube of this filtration unit is communicated with the escape pipe of described water washing device, and the escape pipe of this filtration unit is communicated with described house steward;
When being provided with the cascade filtration device, wherein the draft tube of the filtration unit of the first order is communicated with the escape pipe of described water washing device, the draft tube of all the other filtration units is communicated with the escape pipe of previous stage filtration unit, and the escape pipe of the filtration unit of afterbody is communicated with described house steward.
10, as claim 5 or 9 described gas analysis pretreatment systems, it is characterized in that described filtration unit comprises the dry filter device, the drying agent that comprises soda-lime, coke grain and iron oxide is housed in the airtight container of described dry filter device.
11, a kind of gas analysis pretreatment system is characterized in that, comprising: control device, gas analysis pretreatment unit, the house steward who is communicated with the draft tube of gas analyzing apparatus, and the snorkel of each sampled point that is communicated with house steward; The snorkel of each sampled point is provided with valve; Described control device is used to control the opening and closing of described valve, makes the current sample gas that a sampled point only arranged send into described gas analysis pretreatment unit by snorkel through house steward and handles.
12, gas analysis pretreatment system as claimed in claim 11 is characterized in that, described control device is opened the valve of each sampled point snorkel in turn according to the opening sequence and the processing time of each default sampled point snorkel.
13, gas analysis pretreatment system as claimed in claim 11 is characterized in that, described house steward also is provided with water vapour draft tube and the water vapour escape pipe that is communicated with it, and described water vapour draft tube and escape pipe are respectively equipped with valve; Described control device is by the opening and closing of the valve of control described water vapour draft tube and escape pipe, the water vapour of sending into from described water vapour draft tube flowed through discharge from described water vapour escape pipe behind the described house steward.
14, gas analysis pretreatment system as claimed in claim 13 is characterized in that, described water vapour draft tube and escape pipe are arranged at all sampled point snorkels are communicated with part with described house steward both sides.
15, gas analysis pretreatment system as claimed in claim 11 is characterized in that, described gas analysis pretreatment unit comprises: water washing device is located at sampling gas draft tube and escape pipe, gas filtration liquid water inlet pipe and rising pipe on this water washing device; Wherein, described water washing device is the double-layer seal container, container outer wall is provided with water inlet and water delivering orifice, the pipeline that is located on this water inlet and the water delivering orifice is communicated with the outer sealed container interior of described double-layer seal container, is used for sending into chilled water and it being discharged to carry out heat interchange to this skin sealed container interior.
16, gas analysis pretreatment system as claimed in claim 15 is characterized in that, is provided with double-layer filtering net in the internal container of described water washing device, and wherein one deck is positioned under the liquid level, and another layer is positioned on the liquid level.
17, gas analysis pretreatment system as claimed in claim 15 is characterized in that, described double-layer seal container is a tank container, and tank top and pot bottom are vaulted solid wall, and a jar week constitutes double wall by outer wall and inwall.
As claim 15 or 16 or 17 described gas analysis pretreatment systems, it is characterized in that 18, described gas analysis pretreatment unit also is provided with one or more levels filtration unit;
When being provided with the one-level filtration unit, the draft tube of this filtration unit is communicated with the escape pipe of described water washing device;
When being provided with the cascade filtration device, wherein the draft tube of the filtration unit of the first order is communicated with the escape pipe of described water washing device, and the draft tube of all the other filtration units is communicated with the escape pipe of previous stage filtration unit.
19, gas analysis pretreatment system as claimed in claim 18 is characterized in that, described filtration unit comprises the dry filter device, and the drying agent that comprises soda-lime, coke grain and iron oxide is housed in the airtight container of described dry filter device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100055728A CN101477130A (en) | 2009-01-20 | 2009-01-20 | Gas analysis pretreatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100055728A CN101477130A (en) | 2009-01-20 | 2009-01-20 | Gas analysis pretreatment system |
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| Publication Number | Publication Date |
|---|---|
| CN101477130A true CN101477130A (en) | 2009-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2009100055728A Pending CN101477130A (en) | 2009-01-20 | 2009-01-20 | Gas analysis pretreatment system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104383760A (en) * | 2014-12-11 | 2015-03-04 | 哈尔滨东方报警设备开发有限公司 | Multi-channel gas circuit filtering device |
| CN104888555A (en) * | 2015-06-11 | 2015-09-09 | 江苏华大离心机股份有限公司 | Filtering device matched with gas oxygen content detection equipment |
| CN117113089A (en) * | 2023-10-16 | 2023-11-24 | 北京英视睿达科技股份有限公司 | Methane data complement method, device, equipment and medium based on carbon monoxide |
-
2009
- 2009-01-20 CN CNA2009100055728A patent/CN101477130A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104383760A (en) * | 2014-12-11 | 2015-03-04 | 哈尔滨东方报警设备开发有限公司 | Multi-channel gas circuit filtering device |
| CN104888555A (en) * | 2015-06-11 | 2015-09-09 | 江苏华大离心机股份有限公司 | Filtering device matched with gas oxygen content detection equipment |
| CN117113089A (en) * | 2023-10-16 | 2023-11-24 | 北京英视睿达科技股份有限公司 | Methane data complement method, device, equipment and medium based on carbon monoxide |
| CN117113089B (en) * | 2023-10-16 | 2024-01-23 | 北京英视睿达科技股份有限公司 | Methane data complement method, device, equipment and medium based on carbon monoxide |
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