CN105169938A - Flowing particle heat exchange type organic waste gas oxidation equipment - Google Patents
Flowing particle heat exchange type organic waste gas oxidation equipment Download PDFInfo
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- CN105169938A CN105169938A CN201510646434.3A CN201510646434A CN105169938A CN 105169938 A CN105169938 A CN 105169938A CN 201510646434 A CN201510646434 A CN 201510646434A CN 105169938 A CN105169938 A CN 105169938A
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Abstract
The invention relates to organic waste gas treatment equipment, in particular to flowing particle heat exchange type organic waste gas oxidation equipment. The equipment comprises an oxidation bed, an upper cross flow particle moving bed, a lower cross flow particle moving bed and a plate heat exchanger, wherein the upper cross flow particle moving bed, the plate heat exchanger, the lower cross flow particle moving bed and the oxidation bed are sequentially connected through a circulating pipeline to form a circulation loop, the upper cross flow particle moving bed and the lower cross flow particle moving bed are connected in a vertical communication manner, and a particle conveying device is arranged between the upper cross flow particle moving bed and the lower cross flow particle moving bed. The organic waste gas oxidation equipment has the good heat recovery effect, heat recovery equipment is not required, and efficient heat exchange can be realized on the premises that the manufacturing cost is low and the equipment size is small; the blockage possibility is avoided; the equipment is high in safety, good in reliability, long in service life and low in investment cost.
Description
Technical field
The present invention relates to organic waste gas treatment equipment, be specifically related to a kind of flow particles heat exchange type organic exhaust gas oxidation furnaces.
Background technology
Oxidative treatment is conventional organic waste gas treatment method containing the waste gas of organic solvent, and oxidizing process comprises heating power oxidation (Thermaloxidizers) and Production by Catalytic Combustion Process (catalyticoxidizers) usually.The operation principle that heating power is oxidized is the organic material decomposition Cheng Shuiyu carbon dioxide made under the temperature conditions more than 750 DEG C in waste gas; And catalytic oxidation operation principle is exactly under the effect of catalyst, under the temperature conditions of about 300 DEG C, make the organic material decomposition Cheng Shuiyu carbon dioxide in waste gas.
Current heating power oxidation furnaces (Thermaloxidizers) and oxidation equipment (catalyticoxidizers) structure about the same, unique difference is to have loaded catalyst in oxidation equipment.
Heat exchanger type oxidation furnaces mainly comprises by oxidation bed and heat exchanger, and oxidation bed mainly comprises catalyst and heater, wherein oxidation bed also referred to as oxidation furnace (as Chinese patent application CN201410270048.4 report) or catalytic bed (as Chinese patent application CN201420549259.7 report) or combustion furnace (as Chinese patent application CN201320023761 report).The function of heat exchanger utilizes oxidation furnaces to be vented to carry out exchange heat with the air entering oxidation furnaces.Conventional heat exchanger is shell-and-tube heat exchanger, because the heat transfer coefficient of shell-and-tube heat exchanger is at 10 ~ 12W/m
2.K left and right, heat transfer coefficient is low.In order to heat exchange is abundant, heat transfer area needs enough large, because economic cause, heat transfer area cannot be infinitely great, and therefore heat exchanger type oxidation furnaces exists the high shortcoming of row's actuator temperature.That heating power is oxidized (Thermaloxidizers) or Production by Catalytic Combustion Process (catalyticoxidizers) all requires to carry out under the condition of high temperature, in waste gas, the oxidizing process of organic substance is the process of a release heat simultaneously, so the off-gas oxidizing equipment containing organic solvent all must comprise thermal recovery unit.
At present conventional oxidation furnaces be heat accumulating type oxidation furnaces as Chinese patent application CN201320023761 and CN201420095535 report, regenerative oxidation equipment forms primarily of reversal valve, the first oxidation bed and the second oxidation bed, first oxidation bed and the second oxidation bed structure just the same, oxidation bed comprises heat-storing material, catalyst, heater.Regenerative oxidation equipment is the transmission being realized heat by the accumulation of heat of heat-storing material and heat release, and the accumulation of heat of heat-storing material and heat release are controlled by valve event, the flow direction of air-flow is changed by the position changing valve, there is the risk revealed in two bed heat accumulating type oxidation furnaces, developed three bed oxidation furnaces afterwards.But the no matter number of bed number, heat accumulating type oxidation furnaces is all the heat storage and the thermal release that are realized heat-storing material by the action of valve, and heat-storing material is all actionless.
In a word, there is shortcomings in traditional heat accumulating type oxidation furnaces: equipment volume is huge, and valve event is frequent, and the reliability of valve event directly affects the security of oxidation furnaces; In addition, the heat storage of conventional rotary type regenerative oxidation furnaces (RTO) is very easy to blocked, must regular dust out.
Summary of the invention
The object of the invention is for above-mentioned prior art Problems existing and deficiency, a kind of flow particles heat exchange type organic exhaust gas oxidation furnaces is provided, described flow particles heat exchange type oxidation furnaces utilizes the flowing of particle between high temperature gas flow and low-temperature airflow that high temperature gas flow institute heat content is delivered to low-temperature airflow, does not need to install thermal recovery unit; The heat exchange area of described flow particles heat exchange type can be 200 times of traditional shell pipe heat exchanger on the other hand, and heat transfer coefficient is 10 times of traditional heat exchangers heat transfer coefficient, and thus, the volume of flow particles heat exchange type oxidation furnaces significantly reduces.In addition, the particle in flow particles heat exchanging type heat exchanger is kept in motion all the time, also solves existing heat accumulating type oxidation furnaces and holds susceptible to plugging shortcoming.Flow particles heat exchange type oxidation furnaces great advantage is the valve not having frequent movement, and security of system and reliability increase substantially.
The object of the invention is to be achieved through the following technical solutions:
A kind of flow particles heat exchange type organic exhaust gas oxidation furnaces, comprising: oxidation bed, also comprises cross-flow granular bed, lower cross-flow granular bed, plate type heat exchanger; Closed circuit is connected to form successively by circulating line between above-mentioned cross-flow granular bed, plate type heat exchanger, lower cross-flow granular bed, oxidation bed, be connected up and down between described upper cross-flow granular bed and lower cross-flow granular bed, between upper cross-flow granular bed and lower cross-flow granular bed, particle transport device is set.
The particle flow path that described upper cross-flow granular bed, lower cross-flow granular bed can be made up of grille cloth air regulator.
Described particle transport device comprises particle transport pipe, upper hopper, cutting agency, the next hopper, upper hopper is accessed in particle transport pipe one end, the other end accesses the next hopper, upper hopper is by the upper cross-flow granular bed of cutting agency access, lower cross-flow granular bed accesses the next hopper by cutting agency, and particle is transported to upper hopper from hopper through particle transport pipe.
Particle is transported to the mode of upper hopper from the next hopper, can be Geldart-D particle, and also can be mechanical system conveying, in one embodiment, the mode that particle is transported to upper hopper from the next hopper be a kind of pneumatic conveying mode.
The lower end of described particle transport pipe connects high-pressure air source, and described high-pressure air source can be air compressor machine.
Described particle can be heat-storing sphere, described grain diameter can between 1mm ~ 5mm, when particle moves in upper cross-flow granular bed, the hot gas of discharging from oxidation bed transfers heat to granular heat-storing sphere, from the temperature decline of the gas that oxidation bed is discharged; When particle moves in lower cross-flow granular bed, particle transfers heat to the cold air that the preparation flow through from grain bed enters oxidation bed.In oxidation bed exhaust, the utilization of heat is realized by movement of particles in grain bed.
Described plate type heat exchanger is provided with exhaust gas entrance and the rear air discharge ports of purification of organic solvent, and described plate type heat exchanger can be plate-fin heat exchanger, and described plate-fin heat exchanger can be the aluminium material heat exchanger that pricker welded type manufactures.
Compared with prior art, the present invention has following outstanding advantage:
1, heat recovery is effective, without the need to installing thermal recovery unit.
2, due to particle flow heat exchanger particle area can be shell-and-tube heat exchanger area more than 100 times, and the coefficient of heat transfer of air and particle can be 9 times of the shell-and-tube heat exchanger coefficient of heat transfer, therefore high efficient heat exchanging can be realized under the prerequisite that low cost of manufacture, equipment volume are little.
3, because heat storage is motion, there is not the possibility of blocking;
4, security high, good reliability, long service life.
5, investment cost is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of flow particles heat exchange type of embodiment of the present invention organic exhaust gas oxidation furnaces.
In figure, the exhaust gas entrance c of upper hopper 1, cutting agency 2, upper cross-flow granular bed 3, grille cloth air regulator 4, lower cross-flow granular bed 5, cutting agency 6, the next hopper 7, particle transport pipe 8, oxidation bed 9, electric auxiliary heating 10, catalyst 11, plate type heat exchanger 12, particle transport air intake a, organic solvent, the rear air discharge ports d of purification.
Detailed description of the invention
See Fig. 1, a kind of flow particles heat exchange type organic exhaust gas oxidation furnaces, comprising: oxidation bed 9, also comprises cross-flow granular bed 3, lower cross-flow granular bed 5, plate type heat exchanger 12; Described upper cross-flow granular bed 3, plate type heat exchanger 12, lower cross-flow granular bed 5, oxidation bed 9, between connect to form closed circuit successively by circulating line, be connected up and down between described upper cross-flow granular bed 3 and lower cross-flow granular bed 5, between upper cross-flow granular bed 3 and lower cross-flow granular bed 5, particle transport device is set.
Described particle transport device comprises particle transport pipe 8, upper hopper 1, cutting agency 2, the next hopper 7, cutting agency 6, and upper hopper 1 is accessed in described particle transport pipe 8 one end, and the other end accesses the next hopper 7; Upper hopper 1 accesses upper cross-flow granular bed 3 by cutting agency 2, and lower particle cross-flow moving bed 5 accesses the next hopper 7 by cutting agency 6.
The lower end of described particle transport pipe 8 connects air compressor machine, for generation of pressure-air.
The particle flow path that described upper cross-flow granular bed 3, lower cross-flow granular bed 5 can be made up of grille cloth air regulator 4;
The mode that particle is transported to upper hopper 1 from the next hopper 7 adopts Geldart-D particle;
Described particle is heat-storing sphere, and described grain diameter is 1mm ~ 5mm, and when particle moves in upper cross-flow granular bed 3, the hot gas of discharging from oxidation bed 9 transfers heat to granular heat-storing sphere, from the temperature decline of the gas that oxidation bed 9 is discharged; When particle moves in lower cross-flow granular bed 5, particle transfers heat to the cold air that the preparation flow through from grain bed enters oxidation bed 9.During oxidation bed 9 is vented, the utilization of heat is realized by movement of particles in grain bed.
Plate type heat exchanger described in described plate type heat exchanger 12 is provided with exhaust gas entrance c and the rear air discharge ports d of purification of organic solvent, and described plate type heat exchanger 12 is plate-fin heat exchanger, and it is the aluminium material heat exchanger that pricker welded type manufactures;
Described oxidation bed 9 is catalytic oxidation bed, and described catalytic oxidation bed forms primarily of catalyst 11 (such as platinum, palladium honeycomb catalyst) and electric auxiliary heating 10.
VOCs treatment flow process of the present invention is as follows:
In figure, c is the exhaust gas entrance containing organic solvent, and d is that a is particle transport air intake containing air discharge ports after purification.The air entering oxidation unit from c point first carries out exchange heat through plate type heat exchanger, then through cross-flow granular bed 5, heated after enter oxidation bed, then carry out exchange heat through cross-flow granular bed 3, plate type heat exchanger 12, finally from d point discharged to air.
(1) waste gas containing organic solvent enters plate type heat exchanger 12 from c point, the waste gas preparing to carry out oxidation processes carries out exchange heat with the air carrying out oxidation processes, (2) waste gas heated through plate type heat exchanger 12 heats through lower cross-flow granular bed 5, (3) waste gas through heating enters oxidation bed 9 and carries out oxidation reaction, (4) air of discharging from oxidation bed 9 carries out heat exchange through upper cross-flow granular bed 3, and the air that (5) discharge from upper cross-flow granular bed 3 carries out heat exchange finally discharged to air through plate type heat exchanger 12.
Wherein, the operation principle of upper cross-flow granular bed 3 and lower cross-flow granular bed 5 is as follows:
The particle flow path that upper cross-flow granular bed 3 and lower cross-flow granular bed 5 are all made up of grille cloth air regulator 4, particle moves from top to bottom in flow channel, and air-flow flows vertically through shutter.Particle in upper hopper 1 enters cross-flow granular bed 3 under the effect of cutting agency 2; particle and the high temperature air flow through carry out exchange heat; particle obtains heat; the particle obtaining heat carries out exchange heat at lower cross-flow granular bed 5 with the cold air flow through; heat is passed to cold air, and by heating, particle is cooled air.In lower cross-flow granular bed 5, cooled particle enters the next hopper 7 under the effect of cutting agency 6, finally enter particle transport pipe 8, send along particle transport pipe 8 under the pressure-air effect entered from a point after particle enters particle transport pipe 8 and be transported to upper hopper 1.Particle adopts Geldart-D particle from the next hopper 7 to the load mode of upper hopper 1.
EGT after flow particles moving bed is usually below 250 DEG C, so, plate type heat exchanger can be the aluminium material heat exchanger that pricker welded type manufactures, its coefficient of heat transfer is because fin is to the disturbance of fluid, the boundary layer of formation thermal resistance is constantly updated, and heat transfer coefficient is generally 3 times of shell-and-tube heat exchanger; And under the little temperature difference (1.5 ~ 2 DEG C), heat recovery is effective, under the prerequisite meeting investment economy, can control within 20 DEG C through the hot-air delivery temperature of plate type heat exchanger and the difference of inlet of cold air temperature, therefore air draft thermal loss of the present invention is less than many traditional at present heat regenerators.
Claims (10)
1. a flow particles heat exchange type organic exhaust gas oxidation furnaces, comprising: oxidation bed, characterized by further comprising cross-flow granular bed, lower cross-flow granular bed, plate type heat exchanger; Closed circuit is connected to form successively by circulating line between described upper cross-flow granular bed, plate type heat exchanger, lower cross-flow granular bed, oxidation bed, be connected up and down between described upper cross-flow granular bed and lower cross-flow granular bed, between described upper cross-flow granular bed and lower cross-flow granular bed, particle transport device is set.
2. a kind of flow particles heat exchange type organic exhaust gas oxidation furnaces as claimed in claim 1, is characterized in that described upper cross-flow granular bed, particle flow path that lower cross-flow granular bed is made up of grille cloth air regulator.
3. a kind of flow particles heat exchange type organic exhaust gas oxidation furnaces as claimed in claim 1; it is characterized in that described particle transport device comprises particle transport pipe, upper hopper, cutting agency, the next hopper; upper hopper is accessed in described particle transport pipe one end; the other end accesses the next hopper; upper hopper is by the upper cross-flow granular bed of cutting agency access; lower particle is cross-flow moving bed accesses the next hopper by cutting agency, and particle is transported to upper hopper from hopper through particle transport pipe.
4. a kind of flow particles heat exchange type organic exhaust gas oxidation furnaces as claimed in claim 1, is characterized in that the mode of movement that described particle is transported to upper hopper from hopper through particle transport pipe is Geldart-D particle or machinery conveying.
5. a kind of flow particles heat exchange type organic exhaust gas oxidation furnaces as claimed in claim 4, is characterized in that the mode of movement that described particle is transported to upper hopper from hopper through particle transport pipe is Geldart-D particle.
6. a kind of flow particles heat exchange type organic exhaust gas oxidation furnaces as claimed in claim 1, is characterized in that the lower end of described particle transport pipe connects air compressor machine.
7. a kind of flow particles heat exchange type organic exhaust gas oxidation furnaces as claimed in claim 1, is characterized in that described plate type heat exchanger is plate-fin heat exchanger.
8. a kind of flow particles heat exchange type organic exhaust gas oxidation furnaces as claimed in claim 1, is characterized in that described plate-fin heat exchanger is the aluminium material heat exchanger that pricker welded type manufactures.
9. a kind of flow particles heat exchange type organic exhaust gas oxidation furnaces as described in as arbitrary in claim 1 ~ 8, is characterized in that it is upper cross-flow granular bed, the combination of lower cross-flow granular bed and plate-fin heat exchanger forms.
10. a kind of flow particles heat exchange type organic exhaust gas oxidation furnaces as claimed in claim 9, it is characterized in that described particle is heat-storing sphere, described grain diameter is 1mm ~ 5mm.
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| CN201510646434.3A CN105169938A (en) | 2015-09-30 | 2015-09-30 | Flowing particle heat exchange type organic waste gas oxidation equipment |
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| CN201510646434.3A CN105169938A (en) | 2015-09-30 | 2015-09-30 | Flowing particle heat exchange type organic waste gas oxidation equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108800118A (en) * | 2018-07-03 | 2018-11-13 | 重庆大学 | A kind of CFB Slag waste-heat recovery device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288044A (en) * | 2011-07-22 | 2011-12-21 | 湖南天水蓝能源科技有限公司 | Pipeless heat exchanger and residual-heat recovery system |
| CN104566404A (en) * | 2013-10-29 | 2015-04-29 | 中国石油化工股份有限公司 | Organic waste gas purification method |
| CN205007854U (en) * | 2015-09-30 | 2016-02-03 | 马军 | Granule heat transfer formula that flows organic waste gas oxidation equipment |
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2015
- 2015-09-30 CN CN201510646434.3A patent/CN105169938A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288044A (en) * | 2011-07-22 | 2011-12-21 | 湖南天水蓝能源科技有限公司 | Pipeless heat exchanger and residual-heat recovery system |
| CN104566404A (en) * | 2013-10-29 | 2015-04-29 | 中国石油化工股份有限公司 | Organic waste gas purification method |
| CN205007854U (en) * | 2015-09-30 | 2016-02-03 | 马军 | Granule heat transfer formula that flows organic waste gas oxidation equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108800118A (en) * | 2018-07-03 | 2018-11-13 | 重庆大学 | A kind of CFB Slag waste-heat recovery device |
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