CN213943160U - Multi-hearth furnace for regeneration of activated carbon with tail gas recirculation - Google Patents
Multi-hearth furnace for regeneration of activated carbon with tail gas recirculation Download PDFInfo
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- CN213943160U CN213943160U CN202022921648.6U CN202022921648U CN213943160U CN 213943160 U CN213943160 U CN 213943160U CN 202022921648 U CN202022921648 U CN 202022921648U CN 213943160 U CN213943160 U CN 213943160U
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Abstract
The utility model belongs to the activated carbon regeneration technology relates to many thorax stove tail gas reuse technique, especially a tail gas recirculation's many thorax stove is used in activated carbon regeneration. The multi-hearth furnace comprises a hollow center shaft, a furnace chamber is formed in the area between the outer portion of the center shaft and the inner wall of the multi-hearth furnace, the furnace chamber is divided into a cooling area, an activation area, a pyrolysis area and a drying area from bottom to top, a flue gas outlet is formed in the top of the furnace chamber and communicated with a smoke guide pipe, and the gas outlet end of the smoke guide pipe is communicated with the furnace chamber of the multi-hearth furnace to form circulation. The air outlet end of the smoke guide pipe is communicated with an activation area in the furnace chamber. A branch pipe is manufactured in the smoke guide pipe and is communicated with an external processing device. And a first valve and a second valve are respectively arranged in the main pipeline and the branch pipeline of the smoke guide pipe.
Description
Technical Field
The utility model belongs to the activated carbon regeneration technology relates to many thorax stove tail gas reuse technique, especially a tail gas recirculation's many thorax stove is used in activated carbon regeneration.
Background
The multi-hearth furnace is used as regeneration equipment of waste powder activated carbon and waste particle activated carbon, the predecessor of the multi-hearth furnace is a famous Herreshoff (Herreshoff) roasting furnace, and a design unit and a professional multi-hearth furnace design and technical development enterprise with leading technical strength in the world at present, namely a technical cooperation result of a CBE company in America, a novel activated carbon regeneration multi-hearth furnace MHF-AC, are planned to be adopted. Multi-hearth furnaces (MHF) consist of a cylindrical metal shell of upright construction with an inner lining of refractory material, and a series of horizontal disc-shaped "hearths" arranged in parallel within the shell. The middle shaft vertically penetrates through the whole furnace body, a cantilever structural type harrow arm is arranged on the middle shaft at the corresponding position on each layer of hearth, and harrow teeth/coulters for stirring are arranged on the harrow arm. The rotation of the central shaft drives the harrow arm and harrow teeth, so that the solid material is mechanically pushed to pass through the whole furnace. In the activated carbon regeneration process, saturated carbon sequentially passes through a drying zone (the furnace temperature is 100-300 ℃), a pyrolysis zone (or a roasting zone, the temperature is 400-600 ℃) and a regeneration zone (or an activation zone, the temperature is 800-.
The novel activated carbon regeneration multi-hearth furnace MHF-AC is also unique in that: when the materials pass through a series of compartments (hearths), the reaction environment can be accurately controlled; the temperature in the furnace is greatly different from one hearth to the next, and local reaction environments (different hearth temperatures and gas compositions) can be established by controlling parameters of air injectors, steam injectors, burners and the like. Compared with the traditional rotary kiln regeneration equipment, the rotary kiln regeneration equipment has higher automation degree, safer and cleaner operation environment and lower loss rate of the regenerated carbon; can be directly used for low-loss rate regeneration of powdered activated carbon. The multi-hearth furnace is divided into a plurality of hearths, each section of hearths is provided with a plurality of blanking holes, the materials slowly rotate through the rake arms on the central shaft to alternately move the materials from the outer side to the inner side or from the inner side to the outer side, in the moving process, the materials are in contact with air flow, the adsorbed substances in the waste activated carbon are evaporated, and finally the activity of the activated carbon is recovered. The regeneration process of the waste activated carbon in the multi-hearth furnace is mainly divided into three stages:
A. a drying section: evaporating and drying the water in the activated carbon at the temperature of 100-300 ℃, and staying for about 15 min.
B. A carbonization section: volatilizing and carbonizing the organic matters adsorbed in the active carbon pores at the temperature of 400-600 ℃, and staying for about 15 min.
C. An activation section: introducing steam at the high temperature of 1000 ℃ of 800-: c + H2O → CO + H2, the active carbon is cleaned, the adsorption and decoloration performance is restored to be close to that of the new carbon, and the active carbon stays for about 15 min.
The regenerated active carbon is discharged from the lower part of the rake furnace, and a quenching tank is arranged below the outlet of the rake furnace, so that the regenerated active carbon is cooled and degassed, and then enters the acid washing device to remove redundant ash and other impurities in the regenerated active carbon.
However, in general, the flue gas after being dried, pyrolyzed and activated by the multi-hearth furnace is not reused, and is generally purified and discharged, which undoubtedly causes waste of energy. In order to solve the above problems, some design units have developed an exhaust gas treatment device, for example, patent No. 201410058367.9 discloses a waste heat recovery method, which mainly utilizes a small amount of combustible gas remaining in the exhaust gas. Such a waste heat recovery means is common, and a small amount of combustible gas is used as a heat source of a post-combustion chamber, and then the generated waste heat is subjected to heat exchange with other boilers.
The tail gas recovery mode only emphasizes trace combustible gas and heat generated by the combustible gas, and a large amount of high-temperature steam in the tail gas is wasted. In addition, additional equipment is required to be installed, and the heat exchange efficiency is not high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's not enough, provide a rational in infrastructure, the manifold cycles effectively utilizes tail gas, promotes the activation process, reduces the tail gas recirculation's of energy consumption many thorax stoves for active carbon regeneration.
The utility model adopts the technical proposal that:
tail gas recirculation's active carbon regeneration is with many thorax stoves, including many thorax stoves, many thorax stoves include a hollow axis, this axis outside to the regional furnace chamber that forms between the many thorax stove inner wall, the furnace chamber is by supreme separation down for cooling zone, activation district, pyrolysis district and drying zone, and the top of this furnace chamber is provided with exhanst gas outlet, its characterized in that: the smoke outlet is communicated with a smoke guide pipe, and the air outlet end of the smoke guide pipe is communicated with the furnace chamber of the multi-hearth furnace to form circulation.
Furthermore, the air outlet end of the smoke guide pipe is communicated with an activation area in the furnace chamber.
Furthermore, a branch pipe is manufactured in the smoke guide pipe and is communicated with an external processing device.
Furthermore, a first valve and a second valve are respectively arranged in the main pipeline and the branch pipeline of the smoke guide pipe.
The utility model has the advantages that:
the utility model discloses in, design to the characteristics of active carbon regeneration, the top process of furnace chamber generally is drying process, and consequently this process can produce a large amount of high temperature steam and derive by the exhanst gas outlet as tail gas, and the proportion of its shared tail gas is far away beyond combustible gas's content. In the activation process, a large amount of high-temperature steam is required to react with the coke, so that residual carbon in the pore structure of the activated carbon is removed. Therefore, the value of the method for recycling the high-temperature water vapor in the tail gas is far beyond the value of a small amount of combustible gas. According to the principle, the smoke guide pipe is adopted to conduct the smoke outlet and the activation area, the water vapor in the wet smoke fully reacts with the coke, the generated combustible gas can be matched with high-concentration fuel gas led from the outside to burn for releasing heat, energy is provided for the activation reaction, the water vapor and the combustible gas in the smoke are fully utilized through repeated cyclic utilization, and the purposes of energy conservation and emission reduction are achieved.
The utility model discloses in, the branch pipe that the smoke guide pipe made is used for arranging the tail gas after the manifold cycles outward, and first valve and second valve then control respectively and lead switching on of tobacco guide pipe and branch pipe.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
Exhaust gas recirculation's active carbon regeneration is with many thorax stoves, including many thorax stoves, many thorax stoves include a hollow axis, this axis outside to the regional furnace chamber 5 that forms between the many thorax stove inner wall, the furnace chamber is separated by supreme down for cooling zone, activation zone 6, pyrolysis district and drying zone, and the top of this furnace chamber is provided with exhanst gas outlet, the utility model discloses an innovation lies in, exhanst gas outlet 4 and one lead 1 intercommunication of tobacco pipe, should lead the end of giving vent to anger of tobacco pipe and the furnace chamber of many thorax stoves switches on to form the circulation.
In this embodiment, the gas outlet end of the smoke guiding pipe and the activation region conducting and activating region in the furnace chamber are provided with a burner 7, and the burner is conducted with an external gas storage tank.
In this embodiment, a branch pipe is formed in the smoke guide pipe, and the branch pipe is communicated with an external processing device.
In this embodiment, the main pipeline and the branch pipeline of the smoke guide pipe are respectively provided with a first valve 2 and a second valve 3.
The utility model discloses a working process is:
the utility model discloses during the use, the vapor that produces and the combustible gas who produces at pyrolysis zone and activation zone discharge into the activation zone through the flue gas export and react in the drying zone reaction, vapor and the coke reaction in the wet flue gas, combustible gas combustion reaction gives off the heat in the wet flue gas. Therefore, the flue gas is recycled, the using amount of water vapor is reduced, the reaction cost is reduced, the energy loss is reduced, the purposes of energy conservation and emission reduction are achieved, the tail gas treatment amount is correspondingly reduced, the cost of the water vapor and the combustible gas is reduced by recycling the wet flue gas, the cost of the flue gas treatment stage is reduced, and the economic benefit of the process is improved.
The utility model discloses in, design to the characteristics of active carbon regeneration, the top process of furnace chamber generally is drying process, and consequently this process can produce a large amount of high temperature steam and derive by the exhanst gas outlet as tail gas, and the proportion of its shared tail gas is far away beyond combustible gas's content. In the activation process, a large amount of high-temperature steam is required to react with the coke, so that residual carbon in the pore structure of the activated carbon is removed. Therefore, the value of the method for recycling the high-temperature water vapor in the tail gas is far beyond the value of a small amount of combustible gas. According to the principle, the smoke guide pipe is adopted to conduct the smoke outlet and the activation area, the water vapor in the wet smoke fully reacts with the coke, the generated combustible gas can be matched with high-concentration fuel gas led from the outside to burn for releasing heat, energy is provided for the activation reaction, the water vapor and the combustible gas in the smoke are fully utilized through repeated cyclic utilization, and the purposes of energy conservation and emission reduction are achieved.
The utility model discloses in, the branch pipe that the smoke guide pipe made is used for arranging the tail gas after the manifold cycles outward, and first valve and second valve then control respectively and lead switching on of tobacco guide pipe and branch pipe.
Claims (4)
1. Tail gas recirculation's active carbon regeneration is with many thorax stoves, including many thorax stoves, many thorax stoves include a hollow axis, this axis outside to the regional furnace chamber that forms between the many thorax stove inner wall, the furnace chamber is by supreme separation down for cooling zone, activation district, pyrolysis district and drying zone, and the top of this furnace chamber is provided with exhanst gas outlet, its characterized in that: the smoke outlet is communicated with a smoke guide pipe, and the air outlet end of the smoke guide pipe is communicated with the furnace chamber of the multi-hearth furnace to form circulation.
2. The exhaust gas-recycling activated carbon regeneration multi-hearth furnace according to claim 1, characterized in that: the air outlet end of the smoke guide pipe is communicated with an activation area in the furnace chamber.
3. The exhaust gas-recycling activated carbon regeneration multi-hearth furnace according to claim 1 or 2, characterized in that: a branch pipe is manufactured in the smoke guide pipe and is communicated with an external processing device.
4. The exhaust gas-recycling activated carbon-regenerating multi-hearth furnace according to claim 3, characterized in that: and a first valve and a second valve are respectively arranged in the main pipeline and the branch pipeline of the smoke guide pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022921648.6U CN213943160U (en) | 2020-12-09 | 2020-12-09 | Multi-hearth furnace for regeneration of activated carbon with tail gas recirculation |
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| CN202022921648.6U CN213943160U (en) | 2020-12-09 | 2020-12-09 | Multi-hearth furnace for regeneration of activated carbon with tail gas recirculation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114471499A (en) * | 2022-02-07 | 2022-05-13 | 天津天一爱拓科技有限公司 | High-efficiency regeneration system and method for high-salt-content wood powder activated carbon |
| CN114534705A (en) * | 2022-02-07 | 2022-05-27 | 天津天一爱拓科技有限公司 | Multi-hearth furnace activated carbon regeneration system and method |
| CN115318264A (en) * | 2022-07-17 | 2022-11-11 | 成都环服科技有限责任公司 | Granular waste activated carbon countercurrent rotary kiln pyrolysis regeneration process |
-
2020
- 2020-12-09 CN CN202022921648.6U patent/CN213943160U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114471499A (en) * | 2022-02-07 | 2022-05-13 | 天津天一爱拓科技有限公司 | High-efficiency regeneration system and method for high-salt-content wood powder activated carbon |
| CN114534705A (en) * | 2022-02-07 | 2022-05-27 | 天津天一爱拓科技有限公司 | Multi-hearth furnace activated carbon regeneration system and method |
| CN115318264A (en) * | 2022-07-17 | 2022-11-11 | 成都环服科技有限责任公司 | Granular waste activated carbon countercurrent rotary kiln pyrolysis regeneration process |
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