CN109668158A - Inert gas purge method before combustion furnace goes into operation - Google Patents

Inert gas purge method before combustion furnace goes into operation Download PDF

Info

Publication number
CN109668158A
CN109668158A CN201710967210.1A CN201710967210A CN109668158A CN 109668158 A CN109668158 A CN 109668158A CN 201710967210 A CN201710967210 A CN 201710967210A CN 109668158 A CN109668158 A CN 109668158A
Authority
CN
China
Prior art keywords
inert gas
combustion furnace
purge
purging
method before
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710967210.1A
Other languages
Chinese (zh)
Inventor
曹德舜
庄腾宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Petroleum and Chemical Corp
Sinopec Qingdao Safety Engineering Institute
Original Assignee
China Petroleum and Chemical Corp
Sinopec Qingdao Safety Engineering Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Petroleum and Chemical Corp, Sinopec Qingdao Safety Engineering Institute filed Critical China Petroleum and Chemical Corp
Priority to CN201710967210.1A priority Critical patent/CN109668158A/en
Publication of CN109668158A publication Critical patent/CN109668158A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J1/00—Removing ash, clinker, or slag from combustion chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M11/00—Safety arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

A kind of inert gas purge method before going into operation the present invention relates to combustion furnace mainly solves the problem of when reruning after combustion furnace plan/unplanned shutdown in the prior art due to causing combustion furnace that fire explosion occurs when fuel is remained in burner hearth and lighted a fire again.A kind of inert gas purge method before the present invention goes into operation by using combustion furnace, pass through the parameters such as control purging inert gas capacity, purge time and purge flow rate, ensure that residual fuel concentration is reduced to safe range in burner hearth, and increase fuel concentration monitoring system, combustion furnace plan open/stop and safety interlocking parking etc. operating conditions when to fuel concentration carry out real-time monitoring, and the technical solution that monitoring result is promptly and accurately transferred to Central Control Room preferably solves the above problem, can be used for before combustion furnace goes into operation in inert gas purge.

Description

Inert gas purge method before combustion furnace goes into operation
Technical field
A kind of inert gas purge method before going into operation the present invention relates to combustion furnace.
Background technique
Industrial combustion furnace control field, especially petrochemical industry combustion furnace safe operation during, plan and Purging operation before driving again after unplanned parking is very important.Furnace is directly put again without purging or purging to be not thorough, It easily causes the fuel gas for losing product in burner hearth to meet incendiary source and fire explosion occurs, lead to that combustion furnace safety accident occurs, closely Point stove fire explosion accident is commonplace before what is in the past few years occurred both at home and abroad go into operation.At present in the art, do not quantify to solve The certainly technical difficulty of inert blowing gas flyback time, purge volume and purge flow rate etc., current common practice are under-stream periods It is purged according to technical staff's experience, and is just directly entered after the completion of purging even without progress combustable gas concentration monitoring Point furnace operation, process risk are huge.
Country's chemical plant installations furnace operation regulation only provide to need to satisfy the need before going into operation thorax progress inert gas purge at present, The volume of purge time and purging inert gas is not quantified, it is domestic also without discovery about according to heating furnace body The characteristics such as product, power carry out the pertinent literature of quantization purging scheme.
Summary of the invention
When the technical problem to be solved by the present invention is to rerun after the plan of combustion furnace in the prior art/unplanned shutdown by The problem of causing combustion furnace that fire explosion occurs when remaining, then lighting a fire in burner hearth in fuel provides the new combustion furnace of one kind and opens Inert gas purge method before work.This method has the advantages that safety is preferable.
To solve the above problems, The technical solution adopted by the invention is as follows: a kind of combustion furnace go into operation before inert gas purge Method includes purging inert gas capacity, purge time and purge flow rate parameter by control, it is ensured that residual fuel in burner hearth Concentration is reduced to safe range, and increase fuel concentration monitoring system, combustion furnace plan open/stop and safety interlocking parking work Real-time monitoring is carried out to fuel concentration when condition, and monitoring result is promptly and accurately transferred to Central Control Room.
In above-mentioned technical proposal, it is preferable that inert gas purge includes the following steps: that (1) determination is blown before combustion furnace goes into operation It sweeps with inert gas volume；(2) purging inert gas flow is determined；(3) purging inert blowing gas flyback time is determined；(4) Confirm concentration measurement and control index.
In above-mentioned technical proposal, it is preferable that inert gas purge volume needs to meet: purging with inert gas volume >= (combustion space+exhaust uptake volume) * 5.
In above-mentioned technical proposal, it is preferable that inert gas purge flow needs to meet: purging inert gas flow=combustion It burns the specified heat input of furnace and corresponds to air mass flow.
In above-mentioned technical proposal, it is preferable that inert blowing gas flyback time needs to meet: fuel gas heating furnace purge time >= 20S, fuel oil heating furnace purge time >=15S.
In above-mentioned technical proposal, it is preferable that if purging must increase purging when being reduced with inert gas flow in proportion Between.
In above-mentioned technical proposal, it is preferable that inert gas purge is insufficient in combustion furnace burner hearth, leaves combustable gas concentration Combustable gas concentration high detection signal real-time Transmission to Central Control Room is passed through DCS (decentralised control by Gao Shi, combustible gas detector System) and the processing of SIS (safety instrumented systems) system logic, automatic blowing is executed again.
The present invention designs a kind of combustion furnace and goes into operation burner hearth inert gas purge scheme, is held by controlling purging inert gas The parameters such as amount, purge time and purge flow rate, it is ensured that residual fuel concentration is reduced to safe range in burner hearth, and increases fuel rich Spend monitoring system, combustion furnace plan open/stop and safety interlocking parking etc. operating conditions when to fuel concentration carry out real-time monitoring, and Monitoring result is promptly and accurately transferred to the basis that Central Control Room carries out emergency processing as operator, achieves preferable technology effect Fruit.
The present invention will be further described below by way of examples, but is not limited only to the present embodiment.
Specific embodiment
[embodiment 1]
A kind of inert gas purge method before combustion furnace goes into operation includes purging inert gas capacity, purging by control Time and purge flow rate parameter, it is ensured that residual fuel concentration is reduced to safe range in burner hearth, and increases fuel concentration monitoring system System, combustion furnace plan open/stop and safety interlocking parking etc. operating conditions when to fuel concentration carry out real-time monitoring, and will monitoring knot Fruit is promptly and accurately transferred to Central Control Room.Inert gas purge includes the following steps: that (1) determines purging inertia before combustion furnace goes into operation Gas volume；(2) purging inert gas flow is determined；(3) purging inert blowing gas flyback time is determined；(4) confirm concentration Monitor control index.
Inert gas purge volume needs to meet: purging inert gas volume >=(combustion space+exhaust uptake appearance Product) * 5.
Inert gas purge flow needs to meet: the purging specified heat input of inert gas flow=combustion furnace corresponds to air Flow.
Inert blowing gas flyback time needs to meet: fuel gas heating furnace purge time >=20S, when fuel oil heating furnace purges Between >=15S.
If purging must increase purge time when being reduced with inert gas flow in proportion.
When inert gas purge is insufficient in combustion furnace burner hearth, to leave combustable gas concentration high, combustible gas detector will Combustable gas concentration high detection signal real-time Transmission is handled by DCS and SIS system logic, is executed again automatic to Central Control Room Purging.
By taking delayed coker unit furnace as an example.
Heating furnace adds residual neat recovering system.Furnace processing capacity is 150~200*104 tons/year, combustion space 300m3, Flue volume is 20m3, rated power is that corresponding power is 30m3/min。
Inert gas purge volume needs to meet: purging inert gas volume >=(combustion space+exhaust uptake appearance Product) * 5 i.e.: at least need (300+20) * 5=1600m3Inert gas purged.
Inert gas purge flow needs to meet: the purging specified heat input of inert gas flow=combustion furnace corresponds to air Flow, that is: purging should be greater than 30m with inert gas flow3/min。
1600/30=53min > 20s (minimum purge time), therefore minimum purge time is met the requirements.
Existing purging scheme does not quantify to require.
The present invention designs a kind of combustion furnace and goes into operation burner hearth inert gas purge scheme, is held by controlling purging inert gas The parameters such as amount, purge time and purge flow rate, it is ensured that residual fuel concentration is reduced to safe range in burner hearth, and increases fuel rich Spend monitoring system, combustion furnace plan open/stop and safety interlocking parking etc. operating conditions when to fuel concentration carry out real-time monitoring, and Monitoring result is promptly and accurately transferred to the basis that Central Control Room carries out emergency processing as operator., achieve preferable technology Effect.

Claims (7)

1. a kind of inert gas purge method before combustion furnace goes into operation, when including purging inert gas capacity, purge by control Between and purge flow rate parameter, it is ensured that residual fuel concentration is reduced to safe range in burner hearth, and increase fuel concentration monitoring system, Open/stop in combustion furnace plan and when safety interlocking parking operating condition carries out real-time monitoring to fuel concentration, and by monitoring result and When accurate delivery to Central Control Room.
Inert gas purge method before 2. combustion furnace goes into operation according to claim 1, it is characterised in that combustion furnace is lazy before going into operation Property gas purging include the following steps: that (1) determines purging inert gas volume；(2) purging inert gas flow is determined； (3) purging inert blowing gas flyback time is determined；(4) confirm concentration measurement and control index.
Inert gas purge method before 3. combustion furnace goes into operation according to claim 1, it is characterised in that inert gas purge is held Product, needs to meet: purging inert gas volume >=(combustion space+exhaust uptake volume) * 5.
Inert gas purge method before 4. combustion furnace goes into operation according to claim 1, it is characterised in that inert gas purge stream Amount needs to meet: the purging specified heat input of inert gas flow=combustion furnace corresponds to air mass flow.
Inert gas purge method before 5. combustion furnace goes into operation according to claim 1, it is characterised in that when inert gas purge Between need to meet: fuel gas heating furnace purge time >=20S, fuel oil heating furnace purge time >=15S.
Inert gas purge method before 6. combustion furnace goes into operation according to claim 1, it is characterised in that if purging uses indifferent gas Body flow must increase purge time when reducing in proportion.
Inert gas purge method before 7. combustion furnace goes into operation according to claim 1, it is characterised in that lazy in combustion furnace burner hearth Property when gas purging is insufficient, to leave combustable gas concentration high, combustible gas detector is by combustable gas concentration high detection signal Real-time Transmission is handled by DCS and SIS system logic to Central Control Room, executes automatic blowing again.
CN201710967210.1A 2017-10-17 2017-10-17 Inert gas purge method before combustion furnace goes into operation Pending CN109668158A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710967210.1A CN109668158A (en) 2017-10-17 2017-10-17 Inert gas purge method before combustion furnace goes into operation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710967210.1A CN109668158A (en) 2017-10-17 2017-10-17 Inert gas purge method before combustion furnace goes into operation

Publications (1)

Publication Number Publication Date
CN109668158A true CN109668158A (en) 2019-04-23

Family

ID=66141291

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710967210.1A Pending CN109668158A (en) 2017-10-17 2017-10-17 Inert gas purge method before combustion furnace goes into operation

Country Status (1)

Country Link
CN (1) CN109668158A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113720169A (en) * 2021-09-07 2021-11-30 上海呈彧智能科技有限公司 Regenerative heating furnace flue gas back flushing method and system based on dual-target feedback

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101576313A (en) * 2008-05-07 2009-11-11 中冶焦耐自动化系统有限公司 Method for controlling automatic ignition of tube furnace
CN102954489A (en) * 2012-10-17 2013-03-06 中国石油化工股份有限公司 Improved thermal ignition method of combustion furnace of sulfur recovery device
CN104329687A (en) * 2014-10-22 2015-02-04 中国石油化工股份有限公司 Combination type safety control device and method for preventing instant exploding of petrochemical heating furnace
CN106482151A (en) * 2015-08-25 2017-03-08 上海轻叶工程科技有限公司 Heating furnace combustion system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101576313A (en) * 2008-05-07 2009-11-11 中冶焦耐自动化系统有限公司 Method for controlling automatic ignition of tube furnace
CN102954489A (en) * 2012-10-17 2013-03-06 中国石油化工股份有限公司 Improved thermal ignition method of combustion furnace of sulfur recovery device
CN104329687A (en) * 2014-10-22 2015-02-04 中国石油化工股份有限公司 Combination type safety control device and method for preventing instant exploding of petrochemical heating furnace
CN106482151A (en) * 2015-08-25 2017-03-08 上海轻叶工程科技有限公司 Heating furnace combustion system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113720169A (en) * 2021-09-07 2021-11-30 上海呈彧智能科技有限公司 Regenerative heating furnace flue gas back flushing method and system based on dual-target feedback
CN113720169B (en) * 2021-09-07 2023-08-25 上海呈彧智能科技有限公司 Double-target feedback-based back-flushing method and system for flue gas of regenerative heating furnace

Similar Documents

Publication Publication Date Title
CN204460275U (en) A kind of combustion energy saving safety control system
CN104593536B (en) A kind of method of online replacing air stove blast furnace gas stop valve
CN103395745A (en) Interlock signal system for preventing perchlorination of hydrogen chloride gas, and method thereof
CN109668158A (en) Inert gas purge method before combustion furnace goes into operation
CN202133294U (en) Automatic nitrogen purging device for gas pipe line of heating furnace
CN106222346B (en) A kind of blast furnace and hot blast cupola combustion optimal control method
CN204307526U (en) For the mixed cigarette thermoregulating system of boiler SCR denitration system
CN201844406U (en) Low-heating-value tail gas diffusing device
CN205874470U (en) Blast funnace hot blast stove optimal control system
CN103013538B (en) Method for rapidly switching coke oven heating gas
CN202419679U (en) Flue gas desulfurization system
CN208312434U (en) Regenerative Combustion System with energy-saving explosion-proof device
CN101786191B (en) Flexible control method for gas flow of steel rail gas pressure welding or flame normalizing
CN205191636U (en) HCL synthesizer hydrogen more than needed and natural gas multifuel combustion system
CN204880205U (en) Boiler flame detecting system with protection device
CN102363827B (en) Method and system for coordinative production of electric arc furnace and waste heat recovery device
CN103775214A (en) Monitoring device for scavenging line of gas turbine
CN204269668U (en) A kind of caloric value instrument room safety warning system
CN111482079B (en) Catalytic regeneration flue gas denitration, dedusting and desulfurization system and depressurization method
CN221676066U (en) Slag steel cutting safety system
CN207330376U (en) Furnace of calcium carbide uses the control system of blowing oxygen
CN108397784A (en) Blast furnace gas ignition diffusion system
CN204201888U (en) Combustor capable of improving acid gas treatment capacity
CN200955056Y (en) Blast-furnace coal-gas dry-method dust-control safety diffusion apparatus
CN205062202U (en) Novel gas steel claw is dried device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20190423

RJ01 Rejection of invention patent application after publication