CN217329823U - Heat accumulating type flameless thermal oxidation device - Google Patents
Heat accumulating type flameless thermal oxidation device Download PDFInfo
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- CN217329823U CN217329823U CN202220436693.9U CN202220436693U CN217329823U CN 217329823 U CN217329823 U CN 217329823U CN 202220436693 U CN202220436693 U CN 202220436693U CN 217329823 U CN217329823 U CN 217329823U
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model belongs to the technical field of organic compound waste gas treatment, and relates to a heat accumulating type flameless thermal oxidation device; the direct-fired thermal oxidizer is respectively connected with the first regenerative chamber and the second regenerative chamber through flue gas pipelines; the first regenerative chamber and the second regenerative chamber are respectively connected to a hot air inlet of the direct-fired thermal oxidizer through hot air pipelines; the first heat storage chamber and the second heat storage chamber are respectively connected with an air inlet pipeline; the flue gas pipelines and the air inlet pipelines of the first regenerator and the second regenerator are provided with control valves; the direct-fired thermal oxidizer is connected with a preheating gas pipeline; the utility model discloses an adopt the mode of heat accumulation formula flameless thermal oxidation technology, carry out the organic with heat accumulation formula thermal oxidizer and direct combustion formula thermal oxidizer and combine, utilized the advantage that heat accumulation body heat recovery efficiency is high promptly, solved simultaneously in a large number and got heat and cause the unstable problem of heat accumulation formula thermal oxidizer operation.
Description
Technical Field
The utility model belongs to the technical field of organic compound exhaust-gas treatment, specifically be a heat accumulation formula flameless thermal oxidation device.
Background
VOCs end treatment technologies can be classified into 2 types: one type of non-destructive recovery technology, such as adsorption technology, absorption technology, condensation technology, membrane separation technology, etc.; another category is destruction technologies with destructive properties, such as combustion technologies, photocatalytic degradation technologies, biodegradation technologies, plasma technologies, etc. There are two techniques for treating VOCs by combustion techniques: firstly, a catalyst is used, so that an oxidation reaction is carried out on the surface of the catalyst at a lower temperature; secondly, heating is carried out, so that the temperature of the waste gas containing VOCs reaches the temperature required by the oxidation reaction speed, and the method is divided into a direct-fired thermal oxidation method and a regenerative thermal oxidation method.
The selection of the direct-fired thermal oxidation process and the regenerative thermal oxidation process is mainly based on the heat value of the exhaust gas to be treated. When the heat value of the waste gas is lower, a heat accumulating type thermal oxidation process is recommended; when the calorific value is further increased, if a regenerative thermal oxidation process is adopted, no fuel gas is consumed, and stable operation of the regenerative thermal oxidizer can be realized by doping air on an inlet pipeline or by removing a small amount of heat from a combustion chamber; direct fired thermal oxidation processes may be used when the heating value is higher. When the calorific value is basically 1.0MJ/Nm 3 -1.6MJ/Nm 3 In the process, if a heat accumulating type thermal oxidation process is adopted, most heat needs to be removed, the system is unstable or cannot reach the reaction temperature, so that the system cannot reach the standard, and if a direct combustion type thermal oxidation process is adopted, the temperature of a hearth cannot be maintained by preheating air or waste gas or both through a traditional heat exchanger, and only fuel gas is consumed to maintain the temperature of the furnace.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes the defects of the prior art and provides a heat accumulating type flameless thermal oxidation device; is suitable for treating heat value of 1.0MJ/Nm 3 -1.6MJ/Nm 3 The VOCs exhaust gas of (a). The problem of a large amount of heats cause the unstable operation of heat accumulation formula thermal oxidizer is solved.
In order to achieve the above purpose, the present invention is achieved by the following technical solutions.
A heat accumulating type flameless thermal oxidation device comprises a direct-fired thermal oxidizer, a first regenerative chamber and a second regenerative chamber; the direct-fired thermal oxidizer is respectively connected with the first heat storage chamber and the second heat storage chamber through flue gas pipelines; the first regenerative chamber and the second regenerative chamber are respectively connected to a hot air inlet of the direct-fired thermal oxidizer through hot air pipelines; the first heat storage chamber and the second heat storage chamber are respectively connected with an air inlet pipeline; a flue gas pipeline of the first regenerator is provided with a first flue gas control valve; a flue gas pipeline of the second heat storage chamber is provided with a second flue gas control valve; the air inlet pipeline of the first heat storage chamber is provided with a first air inlet valve, and the air inlet pipeline of the second heat storage chamber is provided with a second air inlet valve; the direct-fired thermal oxidizer is connected with a preheating gas pipeline.
Further, the preheating gas pipeline comprises a combustion air pipeline and a fuel gas pipeline.
Furthermore, a fan is arranged on the combustion air pipeline.
Further, the air inlet pipeline is connected with an air fan.
Furthermore, the first regenerative chamber and the second regenerative chamber are respectively connected with a chimney through an exhaust pipeline.
Further, the exhaust gas line is connected to the direct fired thermal oxidizer via a fan.
The utility model discloses produced beneficial effect for prior art does:
the utility model discloses adopt the heat accumulator to preheat the air when handling waste gas, can retrieve a large amount of high temperature flue gas heat that comes out from direct combustion formula thermal oxidizer because of the heat accumulator, retrieve the heat and can reach 95%, be far above the heat exchange efficiency of any heat exchanger at present, heat recovery efficiency is high.
The utility model discloses the high temperature flue gas heat that will come out through direct combustion formula thermal oxidizer retrieves in a large number and is used for preheating the air, and the high temperature air after preheating gets into direct combustion formula thermal oxidizer, for maintaining certain furnace temperature, has reduced thermal absorption, has reduced the consumption of fuel gas promptly.
After the preheated high-temperature air enters the direct-fired thermal oxygen device, the formation of dispersive combustion, namely flameless combustion, is facilitated. The reduced oxygen concentration in the hot air reduces the reaction rate (density of reactants per unit volume of flame). According to the stoichiometric ratio, more time is needed for the waste gas and the oxygen to completely react, unconsumed waste gas and the oxygen move out of the reaction area, a small part of waste gas and the oxygen react to form a flame, and most of waste gas and the oxygen move out of the reaction area along with the flow of the gas flow until the waste gas and the oxygen are completely consumed. Because the large-area flame combustion is not carried out, a large amount of nitrogen oxides cannot be formed, and the environmental protection property is higher.
The utility model discloses an adopt the mode of heat accumulation formula flameless thermal oxidation technology, carry out the organic with heat accumulation formula thermal oxidizer and direct combustion formula thermal oxidizer and combine, utilized the advantage that heat accumulation body heat recovery efficiency is high promptly, solved simultaneously in a large number and got heat and cause the unstable problem of heat accumulation formula thermal oxidizer operation.
Drawings
Fig. 1 is a schematic connection diagram of a regenerative flameless thermal oxidation apparatus according to the present invention;
in the figure, 1 is a first regenerative chamber, 2 is a second regenerative chamber, 3 is a direct-fired thermal oxidizer, 4 is a flue gas pipeline, 5 is a hot air pipeline, 6 is a hot air inlet, 7 is an air inlet pipeline, 8 is a first flue gas control valve, 9 is a second flue gas control valve, 10 is a first air inlet valve, 11 is a second air inlet valve, 12 is a combustion air pipeline, 13 is a fuel gas pipeline, 14 is a fan, 15 is an air fan, 16 is an exhaust pipeline, 17 is a chimney, and 18 is an exhaust pipeline.
Detailed Description
In order to make the technical problem, technical scheme and beneficial effect that the utility model will solve more clearly understand, combine embodiment and attached drawing, it is right to go on further detailed description the utility model discloses. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.
As shown in fig. 1, the present embodiment provides a regenerative flameless thermal oxidation apparatus including a direct-fired thermal oxidizer 3, a first regenerative chamber 1 and a second regenerative chamber 2; the direct-fired thermal oxidizer 3 is respectively connected with the first regenerative chamber 1 and the second regenerative chamber 2 through a flue gas pipeline 4; the first regenerator 1 and the second regenerator 2 are respectively connected to a hot air inlet 6 of the direct-fired thermal oxidizer 3 through a hot air pipeline 5; the first regenerative chamber 1 and the second regenerative chamber 2 are respectively connected with an air inlet pipeline 7; a flue gas pipeline of the first regenerator 1 is provided with a first flue gas control valve 8; a flue gas pipeline of the second regenerator 2 is provided with a second flue gas control valve 9; the air inlet pipeline of the first heat storage chamber 1 is provided with a first air inlet valve 10, and the air inlet pipeline of the second heat storage chamber 2 is provided with a second air inlet valve 11; the direct-fired thermal oxidizer 3 is connected with a preheated gas pipeline. The preheating gas pipeline comprises a combustion air pipeline 12 and a fuel gas pipeline 13, and a fan 14 is arranged on the combustion air pipeline 12. The air intake duct 7 is connected to an air blower 15. The first regenerator 1 and the second regenerator 2 are each connected to a chimney 17 via a vent line 16. The exhaust gas line 18 is connected to the direct-fired thermal oxidizer 3 via the fan 14.
The specific working principle is as follows: preheating the direct-fired thermal oxidizer 3, wherein during preheating, fuel gas enters a burner of the direct-fired thermal oxidizer 3 through a fuel gas pipeline 13 and combustion air enters a combustion device of the direct-fired thermal oxidizer 3 through a combustion air pipeline 12 to be mixed and combusted in the thermal oxidizer, the temperature of flue gas in the direct-fired thermal oxidizer 3 is stabilized to be about 950 ℃, and air is switched into a regenerator after preheating is finished. Opening a first air inlet valve 10 of the first heat storage chamber 1, sending air into the first heat storage chamber 1 through an air fan 15, and simultaneously opening a second flue gas control valve 9 of the second heat storage chamber 2; the air entering the first heat storage chamber 1 is heated in the first heat storage chamber 1 and then enters the direct-fired thermal oxidizer 3 through the hot air pipeline 5, and at the moment, the direct-fired thermal oxidizer 3 introduces waste gas through the waste gas pipeline 18 for combustion treatment; flue gas with a large amount of heat discharged by the direct-fired thermal oxidizer 3 enters the second regenerative chamber 2 through a flue gas pipeline 4 for heat storage.
During the second circulation, the first air inlet valve 10 and the second flue gas control valve 9 are closed, the first flue gas control valve 8 of the first heat storage chamber 1 and the second air inlet valve 11 of the second heat storage chamber 2 are opened, air is sent into the second heat storage chamber 2 through the air fan 15, the air entering the second heat storage chamber 2 is heated in the second heat storage chamber 2 and then enters the direct-fired thermal oxidizer 3 through the hot air pipeline 5, and at the moment, the direct-fired thermal oxidizer 3 introduces waste gas through the waste gas pipeline 18 for combustion treatment; flue gas with a large amount of heat discharged by the direct-fired thermal oxidizer 3 enters the first regenerative chamber 1 through a flue gas pipeline 4 for heat storage. And the process is repeated in a reciprocating way.
The above description is for further details of the present invention with reference to specific preferred embodiments, and it should not be understood that the embodiments of the present invention are limited thereto, and it will be apparent to those skilled in the art that the present invention can be implemented in a plurality of simple deductions or substitutions without departing from the scope of the present invention, and all such alterations and substitutions should be considered as belonging to the present invention, which is defined by the appended claims.
Claims (6)
1. A regenerative flameless thermal oxidation device is characterized by comprising a direct-fired thermal oxidizer (3), a first regenerative chamber (1) and a second regenerative chamber (2); the direct-fired thermal oxidizer (3) is respectively connected with the first heat storage chamber (1) and the second heat storage chamber (2) through a flue gas pipeline (4); the first heat storage chamber (1) and the second heat storage chamber (2) are respectively connected to a hot air inlet (6) of the direct-fired thermal oxidizer (3) through a hot air pipeline (5); the first heat storage chamber (1) and the second heat storage chamber (2) are respectively connected with an air inlet pipeline (7); a flue gas pipeline of the first regenerator (1) is provided with a first flue gas control valve (8); a flue gas pipeline of the second heat storage chamber (2) is provided with a second flue gas control valve (9); a first air inlet valve (10) is arranged on an air inlet pipeline of the first heat storage chamber (1), and a second air inlet valve (11) is arranged on an air inlet pipeline of the second heat storage chamber (2); the direct-fired thermal oxidizer (3) is connected with a preheated gas pipeline.
2. A regenerative flameless thermal oxidation apparatus according to claim 1, wherein the preheating gas line includes a combustion air line (12) and a fuel gas line (13).
3. A regenerative flameless thermal oxidation apparatus according to claim 2, wherein a fan (14) is provided in the combustion air line (12).
4. A regenerative flameless thermal oxidation apparatus according to claim 1, wherein an air blower (15) is connected to the air intake line (7).
5. A regenerative flameless thermal oxidation apparatus according to claim 1, wherein the first regenerator (1) and the second regenerator (2) are connected to a stack (17) through exhaust lines (16), respectively.
6. A regenerative flameless thermal oxidation apparatus according to claim 1, wherein the exhaust gas line (18) is connected to the direct combustion thermal oxidizer (3) through a fan (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220436693.9U CN217329823U (en) | 2022-03-02 | 2022-03-02 | Heat accumulating type flameless thermal oxidation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220436693.9U CN217329823U (en) | 2022-03-02 | 2022-03-02 | Heat accumulating type flameless thermal oxidation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217329823U true CN217329823U (en) | 2022-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220436693.9U Active CN217329823U (en) | 2022-03-02 | 2022-03-02 | Heat accumulating type flameless thermal oxidation device |
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| Country | Link |
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| CN (1) | CN217329823U (en) |
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2022
- 2022-03-02 CN CN202220436693.9U patent/CN217329823U/en active Active
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