CN110793045A - Three-chamber organic waste gas heat accumulation oxidation furnace - Google Patents

Three-chamber organic waste gas heat accumulation oxidation furnace Download PDF

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Publication number
CN110793045A
CN110793045A CN201911250485.9A CN201911250485A CN110793045A CN 110793045 A CN110793045 A CN 110793045A CN 201911250485 A CN201911250485 A CN 201911250485A CN 110793045 A CN110793045 A CN 110793045A
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CN
China
Prior art keywords
energy exchange
gas
waste gas
exchange towers
chamber
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Pending
Application number
CN201911250485.9A
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Chinese (zh)
Inventor
吴卫江
吴健
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Jiangyin Huitong Packaging Machinery Co Ltd
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Jiangyin Huitong Packaging Machinery Co Ltd
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Priority to CN201911250485.9A priority Critical patent/CN110793045A/en
Publication of CN110793045A publication Critical patent/CN110793045A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44—Details; Accessories
    • F23G5/46—Recuperation of heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/0056—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using solid heat storage material
    • 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
    • Y02E20/30—Technologies for a more efficient combustion or heat usage
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Incineration Of Waste (AREA)

Abstract

The invention discloses a three-chamber organic waste gas heat storage oxidation furnace, which comprises a furnace body, wherein the furnace body consists of three energy exchange towers which are arranged side by side, upper spaces among the three energy exchange towers are communicated, a combustion chamber with a combustion system is arranged on the communicated upper space, waste gas inlets with valves, a clean gas outlet and a recycled gas outlet are arranged on the three energy exchange towers, a main gas inlet pipe and a main gas outlet pipe are connected to the furnace body, and a waste heat recovery device is arranged on the main gas outlet pipe; the air inlets on the three energy exchange towers are all connected with a main air inlet pipe, the air outlets on the three energy exchange towers are all connected with a main air outlet pipe, the recycled air outlets on the three energy exchange towers are connected with the main air inlet pipe, and heat storage beds are arranged in the three energy exchange towers. The invention has the advantages of large waste gas treatment capacity, safe and controllable treatment process, low energy consumption, good environmental protection and great economic benefit.

Description

Three-chamber organic waste gas heat accumulation oxidation furnace
Technical Field
The invention belongs to the field of industrial waste gas treatment, and particularly relates to a three-chamber organic waste gas heat-storage oxidation furnace.
Background
In printing workshops and other places, the volatilization of the solvent causes tail gas to have explosion risks, pollute the environment and cannot be directly discharged. In the prior art, dangerous exhaust gas is usually ignited to remove dangerous component VOC, but the method consumes a large amount of fuel, is high in cost and has high safety risk during control, and therefore, people always want to find a better treatment mode.
Disclosure of Invention
The invention aims to solve the technical problem of providing a three-chamber organic waste gas heat storage oxidation furnace.
The invention is realized by the following technical scheme:
the three-chamber organic waste gas heat storage oxidation furnace comprises a furnace body, wherein the furnace body consists of three energy exchange towers which are arranged in parallel, upper spaces among the three energy exchange towers are communicated, a combustion chamber with a combustion system is arranged on the communicated upper spaces, waste gas inlets with valves, a clean gas outlet and a recycled gas outlet are arranged on the three energy exchange towers, and a main gas inlet pipe and a gas outlet pipe are connected to the furnace body; the air inlets on the three energy exchange towers are all connected with a main air inlet pipe, the air outlets on the three energy exchange towers are all connected with a main air outlet pipe, the recycled air outlets on the three energy exchange towers are connected with the main air inlet pipe, and heat storage beds are arranged in the three energy exchange towers.
Preferably, the heat storage bricks are laid on the heat storage bed, and more preferably, the heat storage bricks are ceramic honeycomb bricks. Furthermore, a temperature sensor is arranged on the heat storage brick.
Preferably, the heat storage bed comprises a support mesh, and a perimeter compensator is arranged around the support mesh and is responsible for compensating expansion caused by inlet and outlet temperature changes.
Preferably, a waste heat recovery device is arranged on the main air outlet pipe, a gas preheating device is arranged on the main air inlet pipe, and the energy of the waste heat recovery device is supplied to the gas preheating device.
Preferably, the heat storage bed is disposed above the gas inlets of the three energy exchange columns. The polluted gas flows through the heat storage bed to complete the preheating stage and then enters the pressure combustion chamber above the energy tower for combustion.
Preferably, the combustion chamber is a pressure combustion chamber.
Preferably, a burner is provided in the combustion chamber.
Preferably, a wind-reducing and thickening system is arranged at the front end of the total air inlet pipe.
Preferably, the main air inlet pipe and the main air outlet pipe are connected with a control system, a valve and a fan.
Preferably, the polluted air flow in the total air inlet pipe is sucked by a BL-01 process fan.
Preferably, the surface of the ceramic tile is provided with a temperature probe, and the combustion chamber stops heating after the temperature reaches a certain value.
More preferably, a refractory coating is applied in the combustion chamber and the heat recovery chamber.
The working principle is as follows: efficient ceramic beds are arranged in the three heat energy exchange towers, energy released in the gas oxidation reaction is stored, and the gas passing through the towers can be oxidized by the stored energy and temperature under the condition of not consuming external natural gas as long as the gas concentration reaches the spontaneous combustion value.
Exothermic chemical reactions take place in the upper layers of the air-intake bed and in the combustion chamber, and the organic matter is oxidized to CO2+ H2O。
The exhaust gas mixture flowing from the combustion chamber passes through the outlet bed chamber, transferring a portion of the heat to the ceramic honeycomb (heat recovery stage). Thus, the temperature difference between the outlet and inlet exhaust gases is about 30-40 ℃ T.
The 3-bed chambers work alternately (average period is 90-120 seconds), and continuous suction is ensured.
The controlled exothermic oxidation process is conducted in a chamber.
The three column design eliminates the possibility of volatile organic compounds peaking in emissions, ensuring that all gases released into the atmosphere are completely treated. This is due to the cleaning effect of the recycle line which recycles the non-oxidizing gas remaining in the system. The gas can be recycled to the third column by opening a valve on the recovery line in each cycle.
The invention has the following energy cycle optimization of the combustion system: high efficiency heat recovery ceramic materials (eliminating fuel consumption); the ceramic material and the structure have extremely low heat dissipation (reduce the power absorption of a fan motor); control software suitable for production requirements comprises a main fan below an inverter and a regulating loop controlled by a differential pressure transducer (the system automatically regulates the rotating speed and the capacity of the fan according to the number of printing lines); the refractory coating is in the combustion chamber and the heat recovery chamber; the ceramic honeycomb support web will be equipped with perimeter compensators that compensate for expansion (or between hot and cold phases, such as atmospheric "scrubbing") due to inlet and outlet temperature changes.
The invention has the beneficial effects that:
the three-chamber organic waste gas heat storage oxidation furnace has the advantages of large waste gas treatment capacity, safe and controllable treatment process, low energy consumption, good environmental protection property and huge economic benefit, and is worthy of popularization.
Drawings
For ease of illustration, the invention is described in detail by the following specific examples and figures.
FIG. 1 is a schematic rear perspective view of the present invention;
FIG. 2 is a schematic front perspective view of the present invention; (ii) a
FIG. 3 is a front view of FIG. 2;
FIG. 4 is a schematic diagram of the gas inlet and outlet of the first stage of the alternate operation of three energy towers;
FIG. 5 is a schematic diagram of the gas inlet and outlet of the second stage of alternate operation of three energy towers;
FIG. 6 is a schematic diagram of the gas inlet and outlet of the third stage of the alternate operation of three energy towers;
fig. 7 is a schematic diagram of the thermal bypass operation.
Detailed Description
As shown in fig. 1 to 7, the three-chamber organic waste gas regenerative oxidation furnace includes a furnace body, the furnace body is composed of three energy exchanging towers 1, 2 and 3 arranged side by side, upper spaces between the three energy exchanging towers are communicated, a combustion chamber 4 with a combustion system is arranged in the communicated upper space, a burner 10 is arranged in the combustion chamber, waste gas inlets with valves, a clean gas outlet and a recycled gas outlet are arranged on the three energy exchanging towers, a main gas inlet pipe 6 and a main gas outlet pipe 7 are connected to the furnace body, a waste heat recovery device 8 is arranged on the main gas outlet pipe 7, and a gas pre-heating device is arranged on the main gas inlet pipe 6; the air inlets on the three energy exchange towers are all connected with a main air inlet pipe, the air outlets on the three energy exchange towers are all connected with a main air outlet pipe, the recycled air outlets on the three energy exchange towers are connected with the main air inlet pipe, and heat storage beds 5 are arranged in the three energy exchange towers.
The heat storage bricks are laid on the heat storage bed and are ceramic honeycomb bricks.
And after a recycled gas outlet on the three energy exchange towers is connected with a total recycling pipe 9, the total recycling pipe 9 is connected with a total gas inlet pipe 6.
The heat storage bed comprises a support screen, which is provided with a perimeter compensator around it, which is responsible for compensating for expansion due to inlet and outlet temperature variations, or between hot and cold phases, such as "scrubbing" in the atmosphere.
The heat storage bed is arranged at the upper part of the air inlets of the three energy exchange towers.
The combustion chamber is a pressure combustion chamber, and the pressure combustion chamber is pressurized through an LEL parallel type air reduction and concentration increasing system. If high peak and concentration fluctuations occur over time and continuously, the furnace and tower may reach dangerous levels of temperature, in which case the main outlet will release cleaned gas at high temperature by means of a thermal bypass connecting the furnace and the main outlet with a valve, and the system will return to the desired temperature, as shown schematically in fig. 7.
And the main air inlet pipe and the air outlet pipe are connected with a control system, a valve and a fan.
And the polluted air flow in the total air inlet pipe is sucked by a BL-01 process fan.
The surface of the ceramic tile is provided with a temperature probe.
A refractory coating is applied to the combustion chamber and the heat recovery chamber.
The working principle is as follows: efficient ceramic beds are arranged in the three heat energy exchange towers, energy released in the gas oxidation reaction is stored, and the gas passing through the towers can be oxidized by the stored energy and temperature under the condition of not consuming external natural gas as long as the gas concentration reaches the spontaneous combustion value.
Exothermic chemical reactions take place in the upper layers of the air-intake bed and in the combustion chamber, and the organic matter is oxidized to CO2+ H2O。
The exhaust gas mixture flowing from the combustion chamber passes through the outlet bed chamber, transferring a portion of the heat to the ceramic honeycomb (heat recovery stage). Thus, the temperature difference between the outlet and inlet exhaust gases is about 30-40 ℃ T.
The 3-bed chambers work alternately (average period is 90-120 seconds), and continuous suction is ensured.
The controlled exothermic oxidation process is conducted in a chamber.
The three column design eliminates the possibility of volatile organic compounds peaking in emissions, ensuring that all gases released into the atmosphere are completely treated. This is due to the cleaning effect of the recycle line which recycles the non-oxidizing gas remaining in the system. The gas can be recycled to the third column by opening a valve on the recovery line in each cycle.
In this example, the oxidation of volatile organic compounds is carried out in a combustion chamber where the temperature must be maintained above 850 ℃ and at least 0.8/1 s to obtain 20 mg TVOC/Nm 3.
These conditions can be achieved by using the energy generated by the exothermic chemical reaction (combustion of the solvent to generate heat) and, if necessary, an auxiliary fuel (natural gas or liquefied petroleum gas).
The ceramic heat recovery system is connected with the combustion chamber, and the combustion chamber collects energy from purified hot air discharged by the system. This energy is then periodically released through the valve system into the cooled, contaminated air entering the system.
Maximizing the energy recovery of the regenerative combustion system means minimizing or even neglecting the system operating costs.
By heat recovery, a positive energy balance of the combustion system can be achieved.
The combustion unit consists of 3 combustion chambers with regenerative heat recovery, operating with a high efficiency heat recovery ceramic surface.
Without energy supply, 1 burner will ensure the minimum operating temperature of the combustion chamber.
Under the appropriate conditions of temperature, time and turbulence (3t law), all volatile organic compounds are oxidized to carbon dioxide and water.
And 3, in a circulating state of a system, 1 chamber is in a preheating state, 1 chamber is in heat recovery state, and 1 bed is in a cleaning state, specifically:
in the present invention, each combustion cycle has three different stages of in, out and purge. These three phases maintain the cyclic switching from one column to another, allowing the combustion to continue by means of the thermal energy and temperature generated by the oxidation of the gas of the previous cycle, wherein:
the first stage is as follows:
a tower 1: transferring the heat energy of the heated ceramic tiles to the tail gas of the incoming RTO, heating the tail gas at the same time, and then achieving an oxidation reaction in a combustion chamber
Tower 2, heat energy is transferred from the oxidized gas to the ceramic tiles through the outlet, and the ceramic tiles are heated and the gas is cooled.
Tower 3. during combustion, in order to prevent part of the residual off-gas from reaching the atmosphere at the outlet, this part of the off-gas is returned to the inlet.
And a second stage:
and (2) releasing heat energy from tail gas combustion through the last combustion process and storing the heat energy in ceramic tiles. The outlet of the previous stage is changed into the inlet, and the entering tail gas is heated through ceramic tiles to be combusted.
In the tower 3, the combustion temperature reaches 850 ℃, the burnt tail gas is discharged from the tower 3, and the heat energy is stored in the ceramic tiles.
Tower 1 in order to prevent part of the residual off-gas from reaching the atmosphere at the outlet during combustion, this part of the off-gas will be returned to the inlet.
And a third stage:
the tower 3 is switched again, the tower 3 is changed from an outlet to an inlet, and the heat energy stored in the ceramic tiles is transferred to the entering tail gas
Tower 1 clean gas is discharged to the atmosphere by combustion and thermal energy is stored in the tower 1 ceramic tiles.
Tower 2. during combustion, in order to prevent part of the residual off-gas from reaching the atmosphere at the outlet, this part of the off-gas is returned to the inlet.
The invention has the following energy cycle optimization of the combustion system: high efficiency heat recovery ceramic materials (eliminating fuel consumption); the ceramic material and the structure have extremely low heat dissipation (reduce the power absorption of a fan motor); the refractory coating is in the combustion chamber and the heat recovery chamber; the ceramic honeycomb support network will be equipped with perimeter compensators that are responsible for compensating for expansion due to inlet and outlet temperature variations.
The three-chamber organic waste gas heat storage oxidation furnace has the advantages of large waste gas treatment capacity, safe and controllable treatment process, low energy consumption, good environmental protection property and huge economic benefit, and is worthy of popularization.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.

Claims (7)

1. The three-chamber organic waste gas heat storage oxidation furnace is characterized by comprising a furnace body, wherein the furnace body consists of three energy exchange towers which are arranged in parallel, upper spaces among the three energy exchange towers are communicated, a combustion chamber with a combustion system is arranged on the communicated upper space, waste gas inlets with valves, a clean gas outlet and a recycled gas outlet are arranged on the three energy exchange towers, and a main gas inlet pipe and a main gas outlet pipe are connected to the furnace body; the air inlets on the three energy exchange towers are all connected with a main air inlet pipe, the air outlets on the three energy exchange towers are all connected with a main air outlet pipe, the recycled air outlets on the three energy exchange towers are connected with the main air inlet pipe, and heat storage beds are arranged in the three energy exchange towers.
2. The three-chamber organic waste gas thermal storage oxidation furnace according to claim 1, wherein a waste heat recovery device is provided on the main gas outlet pipe.
3. The three-chamber organic waste gas thermal storage oxidizer of claim 1, wherein a gas preheating device is provided in the inlet manifold.
4. The three-chamber organic waste gas thermal storage oxidation furnace according to claim 1, wherein thermal storage bricks are laid on the thermal storage bed.
5. The three-chamber organic waste gas thermal storage oxidation furnace according to claim 4, wherein a temperature sensor is provided on the thermal storage bricks.
6. The three-chamber organic exhaust gas regenerative oxidizer of claim 1, wherein said regenerative bed is disposed at an upper portion of an inlet of three energy-exchanging towers.
7. The three-chamber organic waste gas thermal storage oxidation furnace according to claim 1, wherein a wind-reducing and thickening system is provided at the front end of the total intake pipe.
CN201911250485.9A 2019-12-09 2019-12-09 Three-chamber organic waste gas heat accumulation oxidation furnace Pending CN110793045A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911250485.9A CN110793045A (en) 2019-12-09 2019-12-09 Three-chamber organic waste gas heat accumulation oxidation furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911250485.9A CN110793045A (en) 2019-12-09 2019-12-09 Three-chamber organic waste gas heat accumulation oxidation furnace

Publications (1)

Publication Number Publication Date
CN110793045A true CN110793045A (en) 2020-02-14

Family

ID=69447925

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911250485.9A Pending CN110793045A (en) 2019-12-09 2019-12-09 Three-chamber organic waste gas heat accumulation oxidation furnace

Country Status (1)

Country Link
CN (1) CN110793045A (en)

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