CN207525187U - A kind of heating unit of long flame dry distillation of coal complete alternation gas - Google Patents
A kind of heating unit of long flame dry distillation of coal complete alternation gas Download PDFInfo
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- CN207525187U CN207525187U CN201721555524.2U CN201721555524U CN207525187U CN 207525187 U CN207525187 U CN 207525187U CN 201721555524 U CN201721555524 U CN 201721555524U CN 207525187 U CN207525187 U CN 207525187U
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Abstract
The utility model discloses a kind of heating units of long flame dry distillation of coal complete alternation gas, it includes at least one set of heat accumulating type heating system, circulating mash gas system, combustion-aid air system, burning gas train and flue gas system, wherein, every group of heat accumulating type heating system includes four heating furnaces and two mixing chambers, every group of four heating furnaces burn two using two and send system, continuous burning continuously exports high temperature circulation gas to the mixing chamber.The utility model can continuously, stablize, balancedly to gas retort provide arbitrary temp thermal circulation gas, substantially improve the operating mode of gas retort, meanwhile the utility model has many advantages, such as that treating capacity is big, flow is simple, auxiliary facility is small, with good investment, efficient and applied widely.
Description
Technical field
The utility model is related to low temperature distillation field in low-order coal, more particularly, to a kind of long flame dry distillation of coal with following entirely
The heating unit of ring gas.
Background technology
Coal resources in China rich reserves, the highly-efficient processing of coal, which utilizes, has become the highest attention of coal in China energy field
Problem.
The middle low temperature distillation technique of low-order coal is main application direction of the coal other than burning and utilizing.It is low in low-order coal
The low-order coal that warm distillation process refers to is heated in the case where completely cutting off air conditions, is decomposed, the destructive distillation product such as generation coal tar, coal gas and semicoke
Process.Specifically retort process is：When heating temperature is higher than 100 DEG C, the moisture evaporation in coal goes out；When temperature is increased to 200
DEG C or more when, the crystallization water disengages in coal；At up to 350 DEG C or more, binding coal starts to soften, and is further formed sticky glue
Plastid (this phenomenon does not occur for mud coal, lignite etc.)；It is precipitated to 400~500 DEG C of most of coal gas and tar；At 450~550 DEG C,
Thermal decomposition continues, and the gradual retrogradation of residue is simultaneously formed by curing semicoke；Higher than 550 DEG C, semicoke continues to decompose, and is precipitated remaining
Volatile matter (main component is hydrogen), semicoke weightlessness are carried out at the same time contraction, form crackle；Temperature is higher than 800 DEG C, the contracting of semicoke volume
It is small to be hardened to form porous coke.By controlling the heating temperature of dry distillation of coal process, different destructive distillation products can be obtained.
The dry distillation of coal press heating medium difference, can be divided into gas heat carrier, solid thermal carriers it is gentle-consolidation close heat carrier
Mode.The utility model belongs to gas heat carrier mode of heating, using high temperature device in Gas as gas heat carrier, provides in gas retort and rises
The heat of high-temperature.Accurately control heated carrier gas into furnace temperature and maintain temperature compared with minor swing, be to improve destructive distillation quality
With the key of yield.
At present, the device heated to methane gas heat carrier is divided into two kinds of sides of tubular heater and recuperative heater
Formula.Tubular heater is generally made of three major parts：Radiation chamber, convection cell and chimney.Fuel (oil or gas) is in radiation chamber
Stove chamber inner combustion, the high-temperature flue gas after burning enters convection cell, washes away the heat exchanger tube equipped with methane gas heat carrier, by heat
The device in Gas being transmitted in heat exchanger tube, completes convection current heat transfer, and the flue gas that temperature reduces is discharged by chimney.Above-mentioned heating process is mainly deposited
In following defect：Since flue-gas temperature is high and not easy to control, the easy scaling loss of heat-exchanging tube bundle, short life；High temperature device in Gas is in tube bank table
The easy carbon distribution in face reduces heat exchange efficiency, when heat-exchanging tube bundle carbon distribution is serious, tube bank can be caused to block, heat transfer process is made to fail；For pipe
For formula heat exchanger, without the effective ways of decarbonizing；The easy carbon distribution in surface is restrained, can be fired under the conditions of excess air
It burns, so as to which scaling loss is restrained；Cyclic fluctuation is presented in the hot device in Gas sent out, and cannot keep constant outlet temperature.Especially big
In the application of technical scale, tubular heater faces a severe test.
Recuperative heater is batch kiln, and heating is divided into two stages, and one is burning stage regenerator, and fuel is (oily
Or gas) burn in heating furnace or outside, the high-temperature flue gas for generation of burning enters Heat Room, high-temperature flue gas and the indoor accumulation of heat that exchanges heat
Heat exchange, the raising of heat-storing material temperature occur for material, and low-temperature flue gas is discharged from chimney；Two for air-supply the heating period, low temperature gas
Gas heat carrier enters Heat Room, heat exchange occurs with high-temperature heat accumulation material, the high temperature gas after heating is transported to gas retort
It is used as gas heat carrier.Above-mentioned burning stage regenerator alternately, can cause entry into gas retort with the air-supply heating period
There is wide range fluctuation in the temperature of methane gas heat carrier, influences retort process, reduces the quality of destructive distillation product and reduces
Oil-collecting ratio.
The coal carbonization technology of heavy industrialization has modularization, easily realizes automation control, economy, environmental protection, coal sub-prime
Utilization rate is high, saves the advantages that human cost, safety, high productivity, but there is an urgent need to a kind of adaptation heavy industrialization, longevity
Life length, easy to clean, be capable of delivered constant temperature methane gas heat carrier heating unit.
Invention content
The purpose of the utility model is to overcome drawbacks described above of the existing technology, provide one kind and can adapt to different rule
The heating unit of the industrialized long flame dry distillation of coal complete alternation gas of mould, can realize continuous burning, continuously supply gas, and temperature is permanent
It is fixed, and easily modularization and automation, it is easy to operate, it is with good investment, it is efficient.
To achieve the above object, the technical solution of the utility model is as follows：
A kind of heating unit of long flame dry distillation of coal complete alternation gas, which is characterized in that add including at least one set of heat accumulating type
Hot systems, circulating mash gas system, combustion-aid air system, burning gas train and flue gas system, wherein, every group of heat accumulating type heating system
System includes four heating furnaces and two mixing chambers.
The heating furnace be recuperative heater, including the combustion chamber being sequentially connected and Heat Room, the Heat Room it is interior
Wall has heat-storing material, and the side of the Heat Room has low-temperature circulating gas inlet, and there is opposite side high temperature circulation gas to go out
Mouthful.
The mixing chamber for inner wall set refractory brick cavity, be divide into upper part and lower part, and top than lower part diameter compared with
Greatly, the top of the mixing chamber has circulating mash gas entrance and cold gas inlet, and lower part is exported with circulating mash gas.High temperature circulation
Gas and cold gas enter mixing chamber from upper diameter larger part, are conducive to the mixing of high temperature, low temperature gas, after through smaller straight
Path portion exports the circulating mash gas of steady temperature.
The circulating mash gas system includes low-temperature circulating gas pipeline and high temperature circulation gas pipeline.
Combustion chamber of the burning gas train respectively with each heating furnace is connected, and is used for respectively to the offer of each heating furnace
The gas of burning.
Combustion chamber of the combustion-aid air system also respectively with each heating furnace is connected, and is helped respectively to the offer of each heating furnace
Fire air.
Heat Room of the flue gas system respectively with each heating furnace is connected, for the high temperature for the Indoor Combustion generation that will burn
The flue gas flue gas that temperature reduces after the heat-storing material heat exchange with the chamber interior walls that exchange heat is discharged from Heat Room.
The low-temperature circulating gas pipeline is connected with the low-temperature circulating gas inlet of the heating furnace, for by circulating mash gas
It is transported to the Heat Room and carries out heat exchange.
One end of the high temperature circulation gas pipeline is connected with the high temperature circulation gas export of the heating furnace, the other end with
The circulating mash gas entrance of the mixing chamber is connected, for the circulating mash gas after heating to be delivered to the mixing chamber.
The cold gas inlet of the mixing chamber is connected with low temperature gas, by adjusting the flow of low temperature gas, adjusts cycle
The temperature of the gas of gas export.
The circulating mash gas outlet of the mixing chamber is connected with gas retort, is carried to the gas heat of gas retort delivered constant temperature
Body.
Described every group of four heating furnaces burn two using two and send system, and continuous burning continuously exports high to the mixing chamber
Warm circulating mash gas.
The recuperative heater can be top ignition heating furnace, external-burning heating furnace or internal combustion type heating furnace.
It can be seen from the above technical proposal that the utility model is by using four heating furnaces and two mixing chambers as one group,
Heating furnace burns two using two and send system, can realize continuous burning, continuously supply gas, and constant temperature, substantially improve gas retort
Operating mode；By replicating the scale that can increase between group and group, processing capacity, and easily modularization and automation, operation are increased
Simply, production efficiency is greatly improved.
Description of the drawings
Fig. 1 is a kind of structure diagram of the heating unit of long flame dry distillation of coal complete alternation gas of the utility model；
Fig. 2 is the structure diagram of the mixing chamber in specific embodiment of the utility model；
1 in figure, low-temperature circulating gas pipeline, 2, high temperature circulation gas pipeline, 3, combustion chamber, 4, Heat Room, 5, cold gas
Entrance, 6, circulating mash gas entrance, 7, circulating mash gas outlet.
Specific embodiment
Below in conjunction with the accompanying drawings, specific embodiment of the present utility model is described in further detail.
It should be noted that in following specific embodiments, in the embodiment that the utility model is described in detail, in order to
The structure of the utility model is clearly showed that in order to illustrate, it is special not draw to the structure in attached drawing according to general proportion, it goes forward side by side
Gone partial enlargement, deformation and simplify processing, therefore, should avoid in this, as the restriction to the utility model to understand.
In following specific embodiment of the present utility model, referring to Fig. 1, Fig. 1 is a kind of long flame of the utility model
The structure diagram of the dry distillation of coal heating unit of complete alternation gas.As shown in the figure, a kind of long flame dry distillation of coal complete alternation gas
Heating unit, including at least one set of heat accumulating type heating system, circulating mash gas system, combustion-aid air system, burning gas train
And flue gas system, wherein, every group of heat accumulating type heating system includes four heating furnaces and two mixing chambers.
Heating furnace is recuperative heater, and including the combustion chamber 3 being sequentially connected and Heat Room 4, the inner wall of Heat Room has
Heat-storing material, specially checker brick, the side of Heat Room have low-temperature circulating gas inlet, and opposite side has high temperature circulation gas
Outlet.It is big that top ignition heating furnace, external-burning heating furnace or internal combustion type heating furnace, the scope of application may be used in heating furnace.Heat accumulating type
Heating furnace has many advantages, such as that production scale is big, small investment, service life are long, easily understands carbon distribution, especially compared with tubular heater
It is suitble to the large-scale production and application continuously run for a long time.
Burning gas and combustion air enter from heating furnace dome in heating furnace, and burn gas pipeline and combustion air pipeline
There is one of partition wall after into heating furnace, the gas into heating furnace made to enter furnace body along heating furnace inner wall and forms swirling eddy,
It is sufficiently mixed it, then mixed gas passes through downwards Heat Room in combustion chambers burn under the action of chimney and wind turbine
Indoor checker brick exchange heat with exchanging heat.The flue-gas temperature finished that exchanges heat drops to 150 DEG C hereinafter, the flue from heating furnace bottom passes through
Chimney is arranged to air, and heating furnace switchs to logical cycle.SAPMAC method gas is through low-temperature circulating gas pipeline 1 from the low temperature of Heat Room bottom
Circulating mash gas entrance enters in stove to exchange heat with checker brick, then from the high temperature circulation gas export on Heat Room top through high temperature circulation
The discharge of gas pipeline 2 enters mixing chamber by the circulating mash gas entrance 6 of mixing chamber.
It please refers to Fig.2.Mixing chamber sets the cavity of refractory brick for inner wall, is divide into upper part and lower part, and top is than lower part
It is relatively large in diameter, the top of mixing chamber has circulating mash gas entrance 6 and cold gas inlet 5, and there is circulating mash gas to export 7 for lower part.It is high
Warm circulating mash gas enters mixing chamber from circulating mash gas entrance 6, larger from upper diameter with the cold gas that enters from cold gas inlet 5
Place enter mixing chamber, be conducive to gas reduce flow velocity, be sufficiently mixed high temperature, low temperature gas, after it is defeated through smaller diameter portion
Go out the circulating mash gas of steady temperature.Thermal circulation gas temperature in mixing chamber is adjusted in cold gas.Specific temperature after mixing
Circulating mash gas is sent into gas retort or other users from 7 discharge of circulating mash gas outlet of mixing chamber lower part.
Combustion chamber of the gas train of burning respectively with each heating furnace is connected, and provides to burn to each heating furnace respectively
Gas.
Combustion chamber of the combustion-aid air system also respectively with each heating furnace is connected, and provides combustion-supporting sky to each heating furnace respectively
Gas.
Heat Room of the flue gas system respectively with each heating furnace is connected, for the high-temperature flue gas for the Indoor Combustion generation that will burn
The flue gas that temperature reduces after the heat-storing material heat exchange with the chamber interior walls that exchange heat is discharged from Heat Room.
Four heating furnaces are one group, are equipped with two mixing chambers, and heating furnace burns two using two and send system, continuous burning, continuously
High temperature circulation gas is exported to mixing chamber.
It using a group as a module, replicates in groups, increases scale, setting is identical in module, convenient for expanding scale, is convenient for
Automation.
The technique of every group of heat accumulating type heating system heats circulating mash gas, includes the following steps：
1) burn stage regenerator；Combustion air respectively enters reheating furnace with burning gas, is adequately mixed burning,
The high-temperature flue gas that burning generates enters Heat Room 4 and heats heat storage, and the low-temperature flue gas after heat exchange is sent out through flue gas system；
2) it blows the heating period；Low temperature gas enters Heat Room 4, flows through heat storage and is heated to high temperature, the high temperature of formation
Circulating mash gas enters mixing chamber through circulating mash gas outlet, is mixed in mixing chamber high temperature circulation gas with low temperature device in Gas, is formed and used
Constant temperature device in Gas output needed for family；
3) the heat-accumulation combustion stage is carried out continuously with the air-supply stage, cycle alternation；
4) two heating furnaces are in burning stage regenerator, remaining two heating furnace is in air-supply heating period, whole group heating
Device continuous blowing, laser heating.
For the needs kept the safety in production and overhauled, if a heating furnace in every group of heating unit needs to overhaul, remaining
Three heating furnaces burn one using two and send mechanism, can still work normally.
The preferable specific embodiment of the above, only the utility model, but the scope of protection of the utility model is not
This is confined to, in the technical scope that any one skilled in the art discloses in the utility model, according to this practicality
Novel technical solution and its inventive concept is subject to equivalent substitution or change, should all cover the scope of protection of the utility model it
It is interior.
Claims (2)
1. a kind of heating unit of long flame dry distillation of coal complete alternation gas, which is characterized in that heated including at least one set of heat accumulating type
System, circulating mash gas system, combustion-aid air system, burning gas train and flue gas system, wherein, every group of heat accumulating type heating system
Including four heating furnaces and two mixing chambers；
The heating furnace is recuperative heater, including the combustion chamber being sequentially connected and Heat Room, the inner wall tool of the Heat Room
There is heat-storing material, the side of the Heat Room has low-temperature circulating gas inlet, and opposite side has high temperature circulation gas export；
The mixing chamber sets the cavity of refractory brick for inner wall, is divide into upper part and lower part, and top being relatively large in diameter than lower part, institute
Stating the top of mixing chamber has circulating mash gas entrance and cold gas inlet, and lower part is exported with circulating mash gas；
The circulating mash gas system includes low-temperature circulating gas pipeline and high temperature circulation gas pipeline；
Combustion chamber of the burning gas train respectively with each heating furnace is connected, and provides to burn to each heating furnace respectively
Gas；
Combustion chamber of the combustion-aid air system also respectively with each heating furnace is connected, and provides combustion-supporting sky to each heating furnace respectively
Gas；
Heat Room of the flue gas system respectively with each heating furnace is connected, for the high-temperature flue gas for the Indoor Combustion generation that will burn
The flue gas that temperature reduces after the heat-storing material heat exchange with the chamber interior walls that exchange heat is discharged from Heat Room；
The low-temperature circulating gas pipeline is connected with the low-temperature circulating gas inlet of the heating furnace, for circulating mash gas to be conveyed
Heat exchange is carried out to the Heat Room；
One end of the high temperature circulation gas pipeline is connected with the high temperature circulation gas export of the heating furnace, the other end with it is described
The circulating mash gas entrance of mixing chamber is connected, for the circulating mash gas after heating to be delivered to the mixing chamber；
The cold gas inlet of the mixing chamber is connected with low temperature gas；
The circulating mash gas outlet of the mixing chamber is connected with gas retort；
Described every group of four heating furnaces burn two using two and send system, and continuous burning is continuously followed to mixing chamber output high temperature
Ring gas.
2. the heating unit of a kind of long flame dry distillation of coal complete alternation gas according to claim 1, which is characterized in that described
Recuperative heater is top ignition heating furnace, external-burning heating furnace or internal combustion type heating furnace.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721555524.2U CN207525187U (en) | 2017-11-20 | 2017-11-20 | A kind of heating unit of long flame dry distillation of coal complete alternation gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721555524.2U CN207525187U (en) | 2017-11-20 | 2017-11-20 | A kind of heating unit of long flame dry distillation of coal complete alternation gas |
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| CN207525187U true CN207525187U (en) | 2018-06-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107723006A (en) * | 2017-11-20 | 2018-02-23 | 辽宁成大股份有限公司 | A kind of heater and technique of long flame dry distillation of coal complete alternation gas |
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2017
- 2017-11-20 CN CN201721555524.2U patent/CN207525187U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107723006A (en) * | 2017-11-20 | 2018-02-23 | 辽宁成大股份有限公司 | A kind of heater and technique of long flame dry distillation of coal complete alternation gas |
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