CN203893686U - Crude benzene tube furnace flue gas waste heat utilizing system - Google Patents
Crude benzene tube furnace flue gas waste heat utilizing system Download PDFInfo
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- CN203893686U CN203893686U CN201420287803.5U CN201420287803U CN203893686U CN 203893686 U CN203893686 U CN 203893686U CN 201420287803 U CN201420287803 U CN 201420287803U CN 203893686 U CN203893686 U CN 203893686U
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- tube furnace
- flue gas
- heat exchanger
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- tube
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
Provided is a crude benzene tube furnace flue gas waste heat utilizing system. A flue gas channel for flue gas of a crude benzene tube furnace is connected to a shell pass inlet of a tube heat exchanger through an induced draught fan, a flow equalizing plate for scattering high-temperature flue gas is arranged between the induced draught fan and the tube heat exchanger, and a shell pass outlet of the tube heat exchanger is connected to a chimney through a pipeline. A water outlet of a soft water collecting box is connected to a tube pass inlet of the tube heat exchanger through a pump and a pipeline, a tube pass outlet of the tube heat exchanger is connected to a gas and liquid separator, a steam outlet of the gas and liquid separator is connected to a steam inlet of a convection section of the tube furnace through a pipeline, and a condense water opening of the convection section of the tube furnace is connected to a regenerator. Meanwhile, a hot water outlet of a steam and water separator is connected to the soft water collecting box through a pipeline. Flue gas waste heat is effectively recycled, low-pressure steam is generated and supplied to the tube furnace, a self-circulating system is formed, and self-sufficiency of the steam for production is achieved.
Description
Technical field
The utility model relates to crude benzol tube furnace discharged gas fume UTILIZATION OF VESIDUAL HEAT IN technical field, be a kind of in crude benzol tube furnace flue gas, contain waste heat recovery, produce low-pressure steam (more than 3 kilograms), for crude benzol tube furnace unit, save and cancel the outside a kind of bootstrap system of supplying steam link in tube furnace unit.
Background technology
For many years, the useless flue gas in tube furnace is all through chimney, to enter atmosphere always, and its high-temperature tail gas waste heat is not utilized effectively.For example, Ji tempering factory steams in benzene process, in order to guarantee recycle oil quality, rich oil after diamond heating is drawn 1～1.5% and is entered regenerator, with superheated steam, steam and to blow regeneration, oily vapour enters at the bottom of debenzolizing tower as de-benzene vapour source, and residue regularly or continuously enters residue groove.Single seat tube furnace tail gas amount is about 10000 cubes ms/h, exhaust temperature is more than 250 ℃, if this part waste gas residual heat remanufacture low-pressure steam, again for steaming benzene tube furnace unit, to greatly reduce energy consumption cost, increase economic efficiency, based on this, utility model a kind of crude benzol tube furnace flue gas bootstrap system.
Utility model content
For above-mentioned situation, the utility model aims to provide a kind of crude benzol tube furnace flue gas bootstrap system, by effectively, by reclamation of stack gas afterheat, produces low-pressure steam and is supplied to tube furnace, form a self-circulation system, realized more than process steam self-sufficiency certainly.
For achieving the above object, method described in the utility model is solved by following technical scheme:
A crude benzol tube furnace flue gas bootstrap system, comprises tube furnace, air-introduced machine, pipe heat exchanger, steam-water separator, soft water collecting box, regenerator and associated conduit, it is characterized in that,
Crude benzol tube furnace Yan road gas passage is connected to the shell side import of pipe heat exchanger by air-introduced machine, and between described air-introduced machine and pipe heat exchanger, be provided with the homogenizing plate that high-temperature flue gas is disperseed, the shell side outlet of described pipe heat exchanger is connected to chimney by pipeline;
One sealed soft water collecting box, the delivery port of described soft water collecting box is connected to the tube side import of pipe heat exchanger by pump and pipeline, the tube side outlet of described pipe heat exchanger is connected to a gas-liquid separator, the steam (vapor) outlet of described gas-liquid separator is connected to the convection section steam inlet of tube furnace by pipeline, the convection section condensation mouth of a river of described tube furnace is connected to a regenerator; The hot water outlet of described steam-water separator is connected to soft water collecting box by pipeline simultaneously.
The position of described regenerator is lower than the position of tube furnace.
The position of described soft water collecting box is lower than the position of steam-water separator.
Described homogenizing plate be one be covered with through hole sheet metal.
Described pipe heat exchanger is a gas--ability of swimming heat exchange of heat pipe.
The beneficial effects of the utility model are:
(1) turn waste into wealth, the stack gases waste heat of tube furnace is made full use of, produce low-pressure steam, at the convection section that turns back to tube furnace, for steaming benzene unit, change traditional centralized energy resource supply mode.
(2) soft water can recycle, and the consumption of water is very little.
Effectively reduce company's industrial steam consumption, the in the situation that of company's current steam use amount anxiety, can guarantee to produce steam use amount, indirectly played the effect of steady production, obvious economic.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of process chart of crude benzol tube furnace flue gas residual heat system.
1, soft water collecting box, 2, water circulating pump, 3, cold water, 4, pipe heat exchanger, 5, gas-liquid mixture, 6, steam-water separator, 7, saturated vapor, 8, tube furnace, 9, regenerator, 10, air-introduced machine, 11, homogenizing plate, 12, chimney.
The specific embodiment
For many years, the useless flue gas of Ji tempering factory tube furnace is all through chimney, to enter atmosphere always, its high-temperature tail gas waste heat is not utilized, Ji tempering factory steams in benzene process, in order to guarantee recycle oil quality, rich oil after diamond heating is drawn 1～1.5% and is entered regenerator, with superheated steam, steams and blows regeneration.Single seat tube furnace tail gas amount is about 10000m
3/ h, exhaust temperature is more than 250 ℃, for this part waste gas residual heat remanufacture steam, and covering is for steaming benzene unit, minimizing energy consumption cost, increases economic efficiency, utility model a kind of crude benzol tube furnace flue gas UTILIZATION OF VESIDUAL HEAT IN technology.
Its principle is, by setting up air-introduced machine 10, the high-temperature flue gas of crude benzol tube furnace is incorporated into gas--in ability of swimming heat exchange of heat pipe, with soft water, carry out heat exchange, make the hot water part vaporization in heat exchanger, heat exchanger adopts shell side to walk flue gas, the technological process that tube side is leaked water, the gas-liquid mixture in tube side, by tube connector, send into steam-water separator (drum) and carry out gas-liquid separation, the saturation water in steam-water separator returns to soft water collecting box by down-comer and recycles.Steam enters tube furnace convection section and carries out post bake, makes it to be heated to specified overtemperature from saturation temperature.
Crude benzol tube furnace reclamation of stack gas afterheat system is comprised of several parts such as softening water station (being responsible for supplying water to pipe heat exchanger by soft water collecting box 1 and water circulating pump 2), air-introduced machine 10, chimney 12, homogenizing plate 11, pipe heat exchanger 4, moisture trap 6 (drum), tube furnace 8 convection sections (steam superheater).
By air-introduced machine 10, the high-temperature flue gas of crude benzol tube furnace is incorporated in pipe heat exchanger, pipe heat exchanger herein is preferentially selected air-water formula heat exchange of heat pipe, the soft water of sending here with soft water collecting box 1 carries out heat exchange, in heat transfer process, soft water is converted to gas-liquid mixture 5 states by cold water 3 states, discarded temperature reduction after heat exchange simultaneously, after heat exchange, waste gas is through chimney 12 discharges, soft water after heat exchange produces gas-liquid mixture 5 after heating, by tube connector, send into steam-water separator 6 (drum) and carry out gas-liquid separation, saturation water in drum is delivered to soft water collecting box 1 by down-comer and is recycled.The convection section that saturated vapor 7 enters in tube furnace 8 carries out post bake, makes it to be heated to specified overtemperature from saturation temperature, recycles altogether.The convection section condensation mouth of a river of tube furnace 8 is connected to a regenerator 9, collects condensed water, and for ease of the collection of condensed water, wherein the position of regenerator is lower than the position of tube furnace.Wherein,
(I) soft water supplementary device
Soft water collecting box 1 is set, by water circulating pump 2, soft water is squeezed into heat exchanger 4, soft water after heat exchange produces gas-liquid mixture 5 after heating, sends into steam-water separator 6 (drum) and carries out gas-liquid separation, and the saturation water in drum is delivered to softened water tank 1 by down-comer and recycled.Motor-driven valve on water-level gauge in soft water collecting box and softening water station inlet pipeline is chain, and the auto-compensation of real-time pneumatic demineralized water, realizes automatic liquid surface control, makes it to remain on predetermined rational liquid level.
(II) flue gas flow field distributes
Evenly whether flue gas flow field, directly affects the service life of heat transfer effect and equipment.This design has a very large extended corner at flue and heat exchanger 4 interfaces, if do not added processing, certainly will cause flue gas flow field skewness, flue gas bias current and heat pipe wearing and tearing inequality, affects the service life of equipment.For this reason, at reducing place, homogenizing plate 11 need be set, homogenizing plate is a steel plate that is covered with circular hole, vertically arranges, flue gas is broken up, and guarantees that flue gas is uniformly by the shell side of pipe heat exchanger, and heat exchange steadily and efficiently.
The stack gases that native system produces crude benzol tube furnace by air-introduced machine is introduced in heat exchange of heat pipe with soft water heat exchange, the low-pressure steam of producing after heat exchange (more than 3 kilograms), for crude benzol unit, realized more than process steam self-sufficiency certainly, effectively reduce company's industrial steam consumption, realize energy-saving and cost-reducing object.
Claims (5)
1. a crude benzol tube furnace flue gas bootstrap system, comprises tube furnace, air-introduced machine, pipe heat exchanger, steam-water separator, soft water collecting box, regenerator and associated conduit, it is characterized in that,
Crude benzol tube furnace Yan road gas passage is connected to the shell side import of pipe heat exchanger by air-introduced machine, and between described air-introduced machine and pipe heat exchanger, be provided with the homogenizing plate that high-temperature flue gas is disperseed, the shell side outlet of described pipe heat exchanger is connected to chimney by pipeline;
One sealed soft water collecting box, the delivery port of described soft water collecting box is connected to the tube side import of pipe heat exchanger by pump and pipeline, the tube side outlet of described pipe heat exchanger is connected to a gas-liquid separator, the steam (vapor) outlet of described gas-liquid separator is connected to the convection section steam inlet of tube furnace by pipeline, the convection section condensation mouth of a river of described tube furnace is connected to a regenerator; The hot water outlet of described steam-water separator is connected to soft water collecting box by pipeline simultaneously.
2. a kind of crude benzol tube furnace flue gas bootstrap system according to claim 1, is characterized in that, the position of described regenerator is lower than the position of tube furnace.
3. a kind of crude benzol tube furnace flue gas bootstrap system according to claim 1, is characterized in that, the position of described soft water collecting box is lower than the position of steam-water separator.
4. a kind of crude benzol tube furnace flue gas bootstrap system according to claim 1, is characterized in that, described homogenizing plate be one be covered with through hole sheet metal.
5. a kind of crude benzol tube furnace flue gas bootstrap system according to claim 1, is characterized in that, described pipe heat exchanger is gas--ability of swimming heat exchange of heat pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420287803.5U CN203893686U (en) | 2014-05-30 | 2014-05-30 | Crude benzene tube furnace flue gas waste heat utilizing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420287803.5U CN203893686U (en) | 2014-05-30 | 2014-05-30 | Crude benzene tube furnace flue gas waste heat utilizing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203893686U true CN203893686U (en) | 2014-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420287803.5U Expired - Fee Related CN203893686U (en) | 2014-05-30 | 2014-05-30 | Crude benzene tube furnace flue gas waste heat utilizing system |
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| CN (1) | CN203893686U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489290A (en) * | 2018-05-21 | 2018-09-04 | 北京航天石化技术装备工程有限公司 | A kind of high-temperature flue gas residual neat recovering system |
| CN110207510A (en) * | 2019-05-14 | 2019-09-06 | 淄博棠鸣机电科技有限公司 | A kind of recoverable exhaust gas environment-friendly processing unit of heat |
-
2014
- 2014-05-30 CN CN201420287803.5U patent/CN203893686U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489290A (en) * | 2018-05-21 | 2018-09-04 | 北京航天石化技术装备工程有限公司 | A kind of high-temperature flue gas residual neat recovering system |
| CN110207510A (en) * | 2019-05-14 | 2019-09-06 | 淄博棠鸣机电科技有限公司 | A kind of recoverable exhaust gas environment-friendly processing unit of heat |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20190530 |
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| CF01 | Termination of patent right due to non-payment of annual fee |