CN104315337A - Device and method for discharging poisonous and harmful cryogenic liquid - Google Patents
Device and method for discharging poisonous and harmful cryogenic liquid Download PDFInfo
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- CN104315337A CN104315337A CN201410538260.4A CN201410538260A CN104315337A CN 104315337 A CN104315337 A CN 104315337A CN 201410538260 A CN201410538260 A CN 201410538260A CN 104315337 A CN104315337 A CN 104315337A
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- pipeline
- torch gas
- poisonous
- torch
- cryogenic liquide
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Abstract
The invention relates to a device and method for discharging poisonous and harmful cryogenic liquid. The device comprises a liquid discharge chute and a flare gas heater. Raw materials are a cryogenic liquid, a cold flare gas and a hot flare gas from the device, the cryogenic liquid is discharged to a liquid buffer tank, is naturally evaporated or forcedly evaporated through a stream of nitrogen and then is converged with a cryogenic cold flare gas from the same device to flow into the flare gas heater; the cold flare gas passes through the flare gas heater to exchange heat with steam to room temperature and then is converged with a room-temperature hot flare gas from the same device to be fed to a flare gas pipe network so as to be burned. The device and method provided by the invention have the advantages of simple operation in process flow, small occupied area, few equipment and low investment.
Description
Technical field
The present invention relates to chemical field, particularly relate to a kind of poisonous and harmful cryogenic liquide tapping equipment and method.
Background technique
Along with the fast development of national economy, the construction of chemical plant installations is every year all in growth at double, and since Modern Coal-based Chemical is Eleventh Five-Year Plan, China's oil chemical industry develops one of maximum bright spot, develops rapidly over nearly 10 years.The device of the chemical product such as particularly current coal liquifaction, coal preparing natural gas, coal-ethylene glycol, ammonia from coal, olefin hydrocarbon making by coal.Along with the foundation of production chemical product factory, how the waste liquid, waste gas etc. of processing plant or equipment exhausting become the key needing research at present.These waste gas and waste liquid generally all contain O
2, CO, H
2, N
2, toxic, inflammable, the explosive dangerous component of the band such as Ar, CxHxOx.Liquid containing these components and gas do not allow directly to be disposed to air, need to be disposed to fixing place and carry out concentrated combustion process.According to experience in the past, chemical enterprise all can arrange in factory the concentrated combustion that torch carries out gas.If device stops or maintenance, the liquid in device and cryogenic gas need after special device process, send into torch pipe network and burn.
The method of current process cryogenic liquide liquid or cryogenic gas is directly sent into after heat exchanger and steam or hot water carry out heat exchange to normal temperature, delivers to the burning of torch pipe network.This kind of processing method easily causes liquid re-heat deficiency to cause torch cannot normal Thorough combustion, and complicated operation.
The present invention is according to the above, adopt a kind of simple to operate, floor space is less, utilize nitrogen and steam-heated come treatment fluid discharge and the Process flow of low wet.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency of the prior art provide a kind of simple to operate, equipment investment is few, flow process simply processes toxicity, the poisonous and harmful cryogenic liquide tapping equipment of inflammable, explosive media fluid discharge and method.
Technological scheme of the present invention is achieved in that a kind of poisonous and harmful cryogenic liquide tapping equipment, this device comprises fluid cushion tank, described fluid cushion tank is connected with the first pipeline passing into cryogenic liquide, the 4th pipeline that described first pipeline and passes into nitrogen crosses, described fluid cushion tank is also connected with one the 5th pipeline, described 5th pipeline and one the 6th pipeline intersect, described 6th pipeline also crosses the second pipe having to pass into cold torch gas, described 6th pipeline is connected on torch gas heater, described torch gas heater is connected with 1 the tenth pipeline, described tenth pipeline is connected the 7th pipeline after intersecting with the 3rd pipeline passing into hot torch gas, described 7th pipeline is provided with safety check and torch gas sends valve, described 7th pipeline is connected with torch pipe network firing unit, described torch gas heater is also connected with one and passes into the 8th pipeline of steam and a condensed water sends valve group, described 8th pipeline is provided with a steam and enters valve.
Described fluid cushion tank is horizontal II type III pressure vessel, shell material S30408, design pressure 0.4MPa, and design temperature is-196 ~ 60 DEG C, and described fluid cushion tank is provided with manhole, exhaust port, outage and online observation level meter.
Described torch gas heater is horizontal II type III pressure vessel, belongs to shell-and-tube heat exchanger, and housing and Bundle material are S30408, and design temperature is-196 ~ 200 DEG C, and in second pipe, cold torch makes shell side leave with rage and design pressure 0.4MPa; Steam in described 7th pipeline walks tube side and described in design pressure 1.0MPa, torch gas heater is provided with exhaust port and outage.
The low wet discharge method of a kind of poisonous and harmful, the method comprises:
The raw material of the method is the cryogenic liquide that upstream device is sent into by the first pipeline, the cold torch gas sent into by second pipe and the hot torch gas sent into by the 3rd pipeline, cryogenic liquide passes through the first discharge of pipes to fluid cushion tank, forced evaporation is carried out by natural evaporation or by the nitrogen passed into by the 4th pipeline, sent by the 5th pipeline after forced evaporation in fluid cushion tank, the cold torch gas of evaporation mixes with the cold torch gas of second pipe and enters torch gas heater by the 6th pipeline in 5th pipeline, the cold torch gas entered in torch gas heater is carried out heat exchange with the steam entered by the 7th pipeline and becomes hot torch gas, tenth ducted hot torch gas is sent into torch pipe network through the 7th pipeline after being mixed by the hot torch gas that the 3rd pipeline is sent into upstream device and is burnt, steam enters after torch gas heater enters torch gas heater and cold torch gas heat exchange through the 8th pipeline and becomes condensed water, condensed water sends valve group through condensed water and the 9th pipeline is sent condensed water battery limit (BL).
Described cryogenic liquide is the poisonous and harmful substance containing H2, N2, CO, Ar, CH4 etc.
Fluid cushion tank is provided with regard to ground pressure instruction PG-01, and operation pressure is 0.1 ~ 0.4Mpa, is provided with far transmission level meter instruction LI-01.
In the tank of fluid cushion tank, level gauging establishes intrinsic safety type Ex ia II CT4, differential pressure liquid level transmitter measuring point LI-01, vaporizing liquid section is done with S31608 stainless steel gauge pipe between knock out drum to differential pressure liquid level transmitter, the curved fluid-tight design of band inverted U, when fluid cushion tank works, level gauging instrument changed by line.
The torch gas temperature being sent into torch pipe network firing unit by the 7th pipeline establishes intrinsic safety type Ex ia II CT6, and flange resistance and temperature measuring point TI-01 is 10 ~ 40 DEG C.
The pressure that the heating steam sent into by the 8th pipeline is come establishes intrinsic safety type Ex ia II CT4, pressure transmitter measuring point PI-02, is 0.2 ~ 1.0MPa.
Far transmission level meter on fluid cushion tank adopts a kind of brand-new setting method, and the method is as follows:
1) level gauging adopts differential pressure principle, and differential pressure liquid level transmitter selects intrinsic safety type Ex ia II CT4;
2) S31608 stainless steel instrument pipeline is on the spot adopted to do vaporization section design, the curved fluid-tight design of band inverted U.
The good effect that technological scheme of the present invention produces is as follows:
(1) fluid cushion tank is through importing nitrogen, and cryogenic liquide enters low temperature buffer tank and utilizes nitrogen to heat, and makes fast liquid evaporation, can fast transition be cryogenic gas, decrease the natural evaporation time.
(2) enter torch gas heater after converging with cryogenic gas after cryogenic liquid vaporizer, decrease the quantity of heater, decrease cost of investment.
(3) the thermal source nitrogen that utilizes of this method and steam, become more readily available, and consume less, less pollution.
(4) this method can process containing poisonous and harmful cryogenic liquide and cryogenic gases such as H2, N2, CO, Ar, CH4, CxHxOx simultaneously.
(5) described fluid cushion tank with 4 ~ 20mA DC remote liquid level height instruction, can according to liquid level number judge whether to need to pass into nitrogen.
(6) the torch gas heater described in is horizontal II type III pressure vessel, belongs to shell-and-tube heat exchanger, good effect of heat exchange.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Be labeled as in figure: 1, fluid cushion tank; 2, torch gas heater; 3, safety check; 4, torch gas sends valve; 5, steam enters valve; 6, condensed water sends valve group; 7, torch pipe network firing unit; 101, the first pipeline; 102, second pipe; 103, the 3rd pipeline; 104, the 4th pipeline; 105, the 5th pipeline; 106, the 6th pipeline; 107, the 7th pipeline; 108, the 8th pipeline; 109, the 9th pipeline; 110, the tenth pipeline.
Embodiment
Embodiment one
A kind of poisonous and harmful cryogenic liquide tapping equipment, this device comprises fluid cushion tank 1, described fluid cushion tank is connected with the first pipeline 101 passing into cryogenic liquide, the 4th pipeline 104 that described first pipeline and passes into nitrogen crosses, described fluid cushion tank is also connected with one the 5th pipeline 105, described 5th pipeline and one the 6th pipeline 106 intersect, described 6th pipeline also crosses the second pipe 102 having to pass into cold torch gas, described 6th pipeline is connected on torch gas heater 2, described torch gas heater is connected with 1 the tenth pipeline 110, described tenth pipeline is connected the 7th pipeline 107 after intersecting with the 3rd pipeline 103 passing into hot torch gas, described 7th pipeline is provided with safety check 3 and torch gas sends valve 4, described 7th pipeline is connected with torch pipe network firing unit 7, described torch gas heater is also connected with one and passes into the 8th pipeline 108 of steam and a condensed water sends valve group 6, described 8th pipeline is provided with a steam and enters valve 5, described condensed water is sent in valve group and is connected one the 9th pipeline 109, and condensed water is sent battery limit (BL) by described 9th pipeline.
Described fluid cushion tank is horizontal II type III pressure vessel, shell material S30408, design pressure 0.4MPa, and design temperature is-196 ~ 60 DEG C, and described fluid cushion tank is provided with manhole, exhaust port, outage and online observation level meter.
Described torch gas heater is horizontal II type III pressure vessel, belongs to shell-and-tube heat exchanger, and housing and Bundle material are S30408, and design temperature is-196 ~ 200 DEG C, and in second pipe, cold torch makes shell side leave with rage and design pressure 0.4MPa; Steam in described 7th pipeline walks tube side and described in design pressure 1.0MPa, torch gas heater is provided with exhaust port and outage.
Described fluid cushion tank is horizontal pressure vessel, and torch gas heater is shell-and-tube heat exchanger.
The working principle of online observation level meter is as follows:
Liquid based on certain altitude liquid level in seal container produces differential pressure principle, differential pressure transmitter is adopted to measure the pressure difference value that in tank body, liquid level produces, pressure difference value after measurement is converted into corresponding actual liquid level height, level value, by 4 ~ 20mA DC signal, is transferred to the display of DCS or SIS system and interlocking of reporting to the police.
Online observation level meter mounting structure is as follows: add Flange Globe Valves at the root going out liquid knock out drum, is beneficial to tank body and purges and level meter maintenance; After going out liquid knock out drum, design length is that the stainless steel gauge pipe of 3m does gasification section, utilize atmospheric temperature liquid gasification, prevent fluid cushion pot liquid liquid level from changing generation gasification and not exclusively cause pressure surge, the fluid-tight section that the discrepancy in elevation is 1.5m is set after gasification section.Differential pressure transmitter root adds stainless steel welded ball valve, changes online purge with the instrument pipeline of start-up for differential pressure transmitter.
Embodiment two
Utilize a poisonous and harmful cryogenic liquide discharge method for device described in embodiment one, the method comprises:
The raw material of the method is the cryogenic liquide that upstream device is sent into by the first pipeline 101, the cold torch gas sent into by second pipe 102 and the hot torch gas sent into by the 3rd pipeline 103, cryogenic liquide passes through the first discharge of pipes to fluid cushion tank 1, forced evaporation is carried out by natural evaporation or by the nitrogen passed into by the 4th pipeline 104, sent by the 5th pipeline 105 after forced evaporation in fluid cushion tank, the cold torch gas of evaporation mixes with the cold torch gas of second pipe and enters torch gas heater 2 by the 6th pipeline 106 in 5th pipeline, the cold torch gas entered in torch gas heater is carried out heat exchange with the steam entered by the 7th pipeline 107 and becomes hot torch gas, hot torch gas in tenth pipeline 110 is sent into torch pipe network through the 7th pipeline after being mixed by the hot torch gas that the 3rd pipeline is sent into upstream device and is burnt, steam enters after torch gas heater enters torch gas heater and cold torch gas heat exchange through the 8th pipeline 108 and becomes condensed water, condensed water sends valve group 6 through condensed water and the 9th pipeline 109 is sent condensed water battery limit (BL).
Described cryogenic liquide is the poisonous and harmful substance containing H2, N2, CO, Ar, CH4 etc.
Fluid cushion tank is provided with regard to ground pressure instruction PG-01, and operation pressure is 0.1 ~ 0.4Mpa, is provided with far transmission level meter instruction LI-01.
In the tank of fluid cushion tank, level gauging establishes intrinsic safety type Ex ia II CT4, differential pressure liquid level transmitter measuring point LI-01, vaporizing liquid section is done with S31608 stainless steel gauge pipe between knock out drum to differential pressure liquid level transmitter, the curved fluid-tight design of band inverted U, when fluid cushion tank works, level gauging instrument changed by line.
The torch gas temperature being sent into torch pipe network firing unit 7 by the 7th pipeline establishes intrinsic safety type Ex ia II CT6, and flange resistance and temperature measuring point TI-01 is 10 ~ 40 DEG C.
The pressure that the heating steam sent into by the 8th pipeline is come establishes intrinsic safety type Ex ia II CT4, pressure transmitter measuring point PI-02, is 0.2 ~ 1.0MPa.
Far transmission level meter on fluid cushion tank adopts a kind of brand-new setting method, and the method is as follows:
1) level gauging adopts differential pressure principle, and differential pressure liquid level transmitter selects intrinsic safety type Ex ia II CT4;
2) S31608 stainless steel instrument pipeline is on the spot adopted to do vaporization section design, the curved fluid-tight design of band inverted U.
Poisonous and harmful cryogenic liquide tapping equipment in the present embodiment is the device described in embodiment one, and this is no longer going to repeat them.
Claims (10)
1. a poisonous and harmful cryogenic liquide tapping equipment, it is characterized in that: this device comprises fluid cushion tank, described fluid cushion tank is connected with the first pipeline passing into cryogenic liquide, the 4th pipeline that described first pipeline and passes into nitrogen crosses, described fluid cushion tank is also connected with one the 5th pipeline, described 5th pipeline and one the 6th pipeline intersect, described 6th pipeline also crosses the second pipe having to pass into cold torch gas, described 6th pipeline is connected on torch gas heater, described torch gas heater is connected with 1 the tenth pipeline, described tenth pipeline is connected the 7th pipeline after intersecting with the 3rd pipeline passing into hot torch gas, described 7th pipeline is provided with safety check and torch gas sends valve, described 7th pipeline is connected with torch pipe network firing unit, described torch gas heater is also connected with one and passes into the 8th pipeline of steam and a condensed water sends valve group, described 8th pipeline is provided with a steam and enters valve, described condensed water is sent in valve group and is connected one the 9th pipeline.
2. a kind of poisonous and harmful cryogenic liquide tapping equipment according to claim 1, it is characterized in that: described fluid cushion tank is horizontal II type III pressure vessel, shell material S30408, design pressure 0.4MPa, design temperature is-196 ~ 60 DEG C, and described fluid cushion tank is provided with manhole, exhaust port, outage and online observation level meter.
3. a kind of poisonous and harmful cryogenic liquide tapping equipment according to claim 1, it is characterized in that: described torch gas heater is horizontal II type III pressure vessel, belong to shell-and-tube heat exchanger, housing and Bundle material are S30408, design temperature is-196 ~ 200 DEG C, and in second pipe, cold torch makes shell side leave with rage and design pressure 0.4MPa; Steam in described 7th pipeline walks tube side and described in design pressure 1.0MPa, torch gas heater is provided with exhaust port and outage.
4. utilize a poisonous and harmful cryogenic liquide discharge method for device as claimed in claim 1, it is characterized in that: the method comprises:
The raw material of the method is the cryogenic liquide that upstream device is sent into by the first pipeline, the cold torch gas sent into by second pipe and the hot torch gas sent into by the 3rd pipeline, cryogenic liquide passes through the first discharge of pipes to fluid cushion tank, by natural evaporation or mix with the cold torch gas of second pipe after carrying out forced evaporation by the nitrogen passed into by the 4th pipeline and enter torch gas heater by the 6th pipeline, the cold torch gas entered in torch gas heater is carried out heat exchange with the steam entered by the 7th pipeline and becomes hot torch gas, tenth ducted hot torch gas is sent into torch pipe network through the 7th pipeline after being mixed by the hot torch gas that the 3rd pipeline is sent into upstream device and is burnt, steam enters after torch gas heater enters torch gas heater and cold torch gas heat exchange through the 8th pipeline and becomes condensed water, condensed water sends valve group through condensed water and the 9th pipeline is sent condensed water battery limit (BL).
5. poisonous and harmful cryogenic liquide discharge method according to claim 4, is characterized in that: described cryogenic liquide is the poisonous and harmful substance containing H2, N2, CO, Ar, CH4 etc.
6. poisonous and harmful cryogenic liquide discharge method according to claim 4, is characterized in that: fluid cushion tank is provided with regard to ground pressure instruction PG-01, and operation pressure is 0.1 ~ 0.4Mpa, is provided with far transmission level meter instruction LI-01.
7. poisonous and harmful cryogenic liquide discharge method according to claim 4, it is characterized in that: in the tank of fluid cushion tank, level gauging establishes intrinsic safety type Ex ia II CT4, differential pressure liquid level transmitter measuring point LI-01, vaporizing liquid section is done with S31608 stainless steel gauge pipe between knock out drum to differential pressure liquid level transmitter, the curved fluid-tight design of band inverted U, when fluid cushion tank works, level gauging instrument changed by line.
8. poisonous and harmful cryogenic liquide discharge method according to claim 4, is characterized in that: the torch gas temperature being sent into torch pipe network firing unit by the 7th pipeline establishes intrinsic safety type Ex ia II CT6, and flange resistance and temperature measuring point TI-01 is 10 ~ 40 DEG C.
9. poisonous and harmful cryogenic liquide discharge method according to claim 4, is characterized in that: the pressure that the heating steam sent into by the 8th pipeline is come establishes intrinsic safety type Ex ia II CT4, pressure transmitter measuring point PI-02, is 0.2 ~ 1.0MPa.
10. a kind of poisonous and harmful cryogenic liquide discharge method according to claim 6, is characterized in that: the far transmission level meter on fluid cushion tank adopts a kind of brand-new setting method, and the method is as follows:
1) level gauging adopts differential pressure principle, and differential pressure liquid level transmitter selects intrinsic safety type Ex ia II CT4;
2) S31608 stainless steel instrument pipeline is on the spot adopted to do vaporization section design, the curved fluid-tight design of band inverted U.
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|---|---|---|---|
| CN201410538260.4A CN104315337B (en) | 2014-10-14 | 2014-10-14 | A kind of poisonous and harmful cryogenic liquid tapping equipment and method |
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| CN201410538260.4A CN104315337B (en) | 2014-10-14 | 2014-10-14 | A kind of poisonous and harmful cryogenic liquid tapping equipment and method |
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| CN104315337A true CN104315337A (en) | 2015-01-28 |
| CN104315337B CN104315337B (en) | 2016-08-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104654318A (en) * | 2015-03-10 | 2015-05-27 | 山东齐鲁石化工程有限公司 | Low-temperature torch gas liquid separating, gasifying and heating system |
| CN111692895A (en) * | 2019-03-13 | 2020-09-22 | 惠生工程（中国）有限公司 | Cold torch gas liquid separating, vaporizing and heating system |
| CN113432035A (en) * | 2021-06-16 | 2021-09-24 | 中盐安徽红四方股份有限公司 | Low-temperature liquid heating and discharging device and using method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104654318A (en) * | 2015-03-10 | 2015-05-27 | 山东齐鲁石化工程有限公司 | Low-temperature torch gas liquid separating, gasifying and heating system |
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| CN111692895B (en) * | 2019-03-13 | 2022-06-14 | 惠生工程（中国）有限公司 | Cold torch gas liquid separating, vaporizing and heating system |
| CN113432035A (en) * | 2021-06-16 | 2021-09-24 | 中盐安徽红四方股份有限公司 | Low-temperature liquid heating and discharging device and using method thereof |
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| CN104315337B (en) | 2016-08-17 |
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