CN210154358U

CN210154358U - Wood drying kiln exhaust treatment device

Info

Publication number: CN210154358U
Application number: CN201920869341.0U
Authority: CN
Inventors: 肖飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-11
Filing date: 2019-06-11
Publication date: 2020-03-17
Anticipated expiration: 2029-06-11

Abstract

The utility model discloses a waste gas treatment device of a wood drying kiln, which comprises a concentration tower and a combustion tower, wherein the concentration tower is positioned at one side of the combustion tower, and the top end of the concentration tower is provided with a second air outlet pipe, a waste gas inlet pipe is arranged on the outer wall of one side of the concentration tower and is close to the bottom end, and the outer walls of the two sides of the concentration tower are provided with first air outlet pipes at the positions above the waste gas inlet pipe, two sealing clapboards are welded inside the concentration tower, and divide the interior of the concentration tower into a treatment cavity and two buffer cavities by the two sealing clapboards, the utility model is provided with an adsorption box, a cyclone separator and a combustion box, in the process of waste gas treatment, firstly, the VOC (volatile organic compounds) in the waste gas is adsorbed and separated by the adsorbent in the adsorption tank, but the adsorbent can not only effectively absorb VOC in the adsorption process, but also has a certain adsorption effect on suspended particle impurities in the waste gas.

Description

Wood drying kiln exhaust treatment device

Technical Field

The utility model belongs to the technical field of timber drying process, concretely relates to timber drying kiln exhaust treatment device.

Background

The wood drying is an important link in the wood production and utilization process, most of the wood drying kilns are adopted for carrying out wood large-batch drying treatment, the wood can generate a certain amount of VOC (volatile organic compounds) in the drying process, the VOC has strong stimulation effect on a human body under certain conditions and even can react to generate chemical smoke, the direct emission can cause great pollution to the environment, the existing treatment modes for the VOC in the wood drying waste gas in the market comprise combustion treatment and filtration treatment, wherein when the combustion decomposition is carried out, the VOC concentration in the waste gas generated in each stage in the wood drying process is different, if the gas is introduced for a long time for gas combustion decomposition with the same amount, the energy consumption of the whole treatment process is larger, the treatment efficiency of a treatment device is reduced, in addition, the whole air flow temperature can be gradually reduced along with the conduction of the waste gas, wherein the VOC is condensed and cannot enter the combustion chamber, thereby further reducing the decomposition rate achieved during combustion.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a timber drying kiln exhaust treatment device to solve current processing apparatus when carrying out combustion process the energy consumption great, efficiency lower and VOC have the problem of condensation phenomenon at the in-process that switches on.

In order to achieve the above object, the utility model provides a following technical scheme: a waste gas treatment device of a wood drying kiln comprises a concentration tower and a combustion tower, wherein the concentration tower is positioned on one side of the combustion tower, a second outlet pipe is arranged at the top end of the concentration tower, a waste gas inlet pipe is arranged at a position close to the bottom end on the outer wall on one side of the concentration tower, first outlet pipes are arranged at positions above the waste gas inlet pipe on the outer walls on two sides of the concentration tower, two sealing partition plates are welded inside the concentration tower and divide the inside of the concentration tower into a treatment cavity and two buffer cavities, ports of the waste gas inlet pipe and the second outlet pipe are respectively connected with the two buffer cavities, the treatment cavity is positioned between the two sealing partition plates, two adsorption boxes are arranged inside the treatment cavity, ports of the two first outlet pipes are respectively positioned at positions between the bottom ends of the two adsorption boxes and the sealing partition plates, and exhaust valves and air inlet valves are respectively arranged at the top ends and the bottom ends of the adsorption boxes, the port of discharge valve and admission valve is connected with two cushion chambers respectively, intermediate layer chamber and inner chamber have been seted up to the inside of adsorption tank, the inside packing of inner chamber has the adsorbent, the internally mounted of burning tower has cyclone and burning box, the burning box is located cyclone's top, and the position department that burning bottom of the case portion is located cyclone one side installs the gas and advances the pipe, install gas distribution valve and heat exchanger on the outer wall of one side of burning tower, gas distribution valve is located the top of heat exchanger, and is connected with the house steward between gas distribution valve and the burning tower, be connected with first minute pipe and second minute pipe between gas distribution valve and the heat exchanger and the processing chamber respectively, be connected with the passage between heat exchanger and the adsorption tank.

Preferably, the heat exchanger is provided with an exhaust port.

Preferably, the material guide pipe and the second branch pipe are respectively provided with a three-way valve, each three-way valve is provided with two air outlets, and the two air outlets respectively correspond to the positions of the two adsorption boxes.

Preferably, a sealing side plate is welded between the two adsorption tanks.

Preferably, the cyclone separator, the combustion box and the heat exchanger are connected with an air duct.

Compared with the prior art, the utility model, following beneficial effect has:

(1) the utility model is provided with an adsorption box, a cyclone separator and a combustion box, in the process of waste gas treatment, firstly, the adsorbent in the adsorption box is used for adsorbing and separating VOC (volatile organic compounds) in waste gas, but the adsorbent can not only effectively absorb VOC in the adsorption process, but also has a certain adsorption effect on suspended particle impurities in the waste gas, along with the continuous process of waste gas adsorption and separation, the adsorbent can gradually approach to a saturated state, at the moment, the adsorbent is regenerated, and along with the rising of the temperature of the adsorbent in the regeneration process, the VOC can gradually form high-concentration gas to be separated out and flows to the cyclone separator through a material guide pipe, the VOC gas can synchronously carry out the suspended particle impurities adsorbed by the adsorbent while separating out flowing, the gas and impurities are separated in the cyclone separator, the separated gas is guided into the combustion box to be mixed and combusted with gas, at first in the bulk treatment in-process to the adsorptive separation of VOC composition in the waste gas, and the concentration of the inside VOC composition is improved through the continuous absorption of adsorption tank, export the VOC of high concentration and carry out abundant burning decomposition again after accomplishing the concentration, the leading-in volume of the same gas can decompose more VOC under this state, effectively solved in the traditional burning treatment process because of the VOC concentration inequality that contains in the waste gas causes inefficiency, the big scheduling problem of energy consumption, two adsorption tanks in the concentrated tower use in turn in addition, one carries out the adsorptive separation of waste gas, another regenerates and combustion process, the high-efficient separating action of concentrated tower has both been guaranteed, the effectual burning decomposition of accomplishing VOC again.

(2) The utility model discloses set up the gas distribution valve, first minute pipe and second minute pipe, when carrying out gaseous burning decomposition, but contain a large amount of heats in the exhaust gas that produces after the decomposition, this moment through the gas distribution valve, the interact of first minute pipe and second minute pipe is discharged high-temperature gas respectively in process chamber and the heat exchanger, high-temperature gas trades with the adsorption tank heat in the process chamber, provide the effective energy for the high temperature regeneration of adsorbent, and the high-temperature gas of leading-in heat exchanger then and produce the heat exchange between the passage, make the gaseous temperature of mobile VOC further rise, effectively avoid VOC to show condensation phenomenon because of the temperature reduction at the in-process of carrying, thereby guarantee in the VOC can fully get into the combustion box, realize the abundant decomposition of VOC composition in the waste gas.

Drawings

Fig. 1 is a front view of the present invention;

FIG. 2 is a schematic structural diagram of a concentrating tower of the present invention;

FIG. 3 is a schematic structural view of the adsorption tank of the present invention;

in the figure: 1-concentration tower, 2-first gas outlet pipe, 3-waste gas inlet pipe, 4-cyclone separator, 5-fuel gas inlet pipe, 6-combustion box, 7-combustion tower, 8-header pipe, 9-second gas outlet pipe, 10-gas distributing valve, 11-first branch pipe, 12-heat exchanger, 13-material guide pipe, 14-second branch pipe, 15-exhaust valve, 16-treatment cavity, 17-adsorption box, 18-sealing partition board, 19-gas inlet valve, 20-buffer cavity, 21-interlayer cavity, 22-adsorbent and 23-inner cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides the following technical solutions: a wood drying kiln waste gas treatment device comprises a concentration tower 1 and a combustion tower 7, wherein the concentration tower 1 is positioned on one side of the combustion tower 7, a second air outlet pipe 9 is installed at the top end of the concentration tower 1, a waste gas inlet pipe 3 is installed at a position, close to the bottom end, on the outer wall of one side of the concentration tower 1, first air outlet pipes 2 are installed at positions, located above the waste gas inlet pipe 3, on the outer walls of two sides of the concentration tower 1, two sealing partition plates 18 are welded inside the concentration tower 1, the two sealing partition plates 18 divide the interior of the concentration tower 1 into a treatment cavity 16 and two buffer cavities 20, ports of the waste gas inlet pipe 3 and the second air outlet pipe 9 are respectively connected with the two buffer cavities 20, the treatment cavity 16 is positioned between the two sealing partition plates 18, two adsorption tanks 17 are installed inside the treatment cavity 16, the two adsorption tanks 17 in the concentration tower 1 are alternately used, and one is used, the other one is regenerated and combusted, which not only ensures the efficient separation function of the concentration tower 1, but also effectively completes the combustion decomposition of VOC, the ports of the two first air outlet pipes 2 are respectively positioned between the bottom ends of the two adsorption tanks 17 and the sealing partition plate 18, the top ends and the bottom ends of the two adsorption tanks 17 are respectively provided with an exhaust valve 15 and an air inlet valve 19, the ports of the exhaust valve 15 and the air inlet valve 19 are respectively connected with two buffer cavities 20, the adsorption tanks 17 are internally provided with a sandwich cavity 21 and an inner cavity 23, the inner cavity 23 is filled with an adsorbent 22, the adsorbent 22 can not only effectively absorb VOC, but also has a certain adsorption function on suspended particle impurities in waste gas, the combustion tower 7 is internally provided with a cyclone separator 4 and a combustion tank 6, the separation operation of particle impurities in separated gas is effectively completed through the separation function of the cyclone separator 4, and the gas substances generated by the combustion of the particle impurities in the combustion tank 6 are, the combustion box 6 is located above the cyclone separator 4, the fuel gas inlet pipe 5 is installed at the position, located on one side of the cyclone separator 4, at the bottom of the combustion box 6, the air distributing valve 10 and the heat exchanger 12 are installed on the outer wall of one side of the combustion tower 7, the temperature of flowing VOC gas is further raised through the heat exchange effect between the heat exchanger 12 and the material guide pipe 13, the phenomenon that condensation of VOC occurs due to temperature reduction in the conveying process is effectively avoided, the air distributing valve 10 is located above the heat exchanger 12, the main pipe 8 is connected between the air distributing valve 10 and the combustion tower 7, the first material guide pipe 11 and the second material guide pipe 14 are respectively connected between the air distributing valve 10, the heat exchanger 12 and the treatment cavity 16, and the material guide pipe 13 is connected between the heat exchanger 12 and the adsorption box 17.

In order to facilitate the discharge of the heat exchange gas, in the present embodiment, it is preferable that the heat exchanger 12 is provided with an exhaust port.

In order to ensure that the material guiding pipe 13 and the second branch pipe 14 can perform accurate gas guiding, in this embodiment, preferably, three-way valves are respectively disposed on the material guiding pipe 13 and the second branch pipe 14, each three-way valve is provided with two gas outlets, and the two gas outlets respectively correspond to the positions of the two adsorption tanks 17.

In order to ensure that the two adsorption tanks 17 do not interfere with each other, in the embodiment, it is preferable that a sealing side plate is welded between the two adsorption tanks 17.

In order to achieve effective conduction of the cyclone separator 4, in the present embodiment, it is preferable that a gas-guide pipe is connected between the cyclone separator 4 and the combustion box 6 and the heat exchanger 12.

The utility model discloses a theory of operation and use flow: when the utility model is used, the waste gas generated in the drying kiln is guided into the concentration tower 1 through the waste gas inlet pipe 3, the waste gas enters the buffer cavity 20 at the bottom of the concentration tower 1 through the waste gas inlet pipe 3 and then passes through the air inlet valve 19 in the open state, so that the waste gas enters the inner cavity 23 of the corresponding adsorption box 17, the VOC (volatile organic compound) in the waste gas is adsorbed by the adsorbent 22 filled in the inner cavity 23, the adsorbed gas is discharged into the buffer cavity 20 at the top end of the concentration tower 1 through the corresponding exhaust valve 15 and then is discharged or collected by the second air outlet pipe 9 for treatment, the other adsorption box 17 is in the non-treatment state in the process, the corresponding exhaust valve 15 and the air inlet valve 19 are both in the sealing state, but along with the increase of the waste gas treatment time, the adsorbent 22 in the adsorption box 17 gradually reaches the saturation state, the adsorption effect will be gradually reduced, so that the regeneration operation needs to be performed periodically, when the adsorbent 22 is regenerated, the operating states of the two adsorption tanks 17 are changed, so that the waste gas flows into the other adsorption tank 17, meanwhile, the gas is introduced into the combustion tank 6 through the gas inlet pipe 5, so that the gas is sufficiently combusted in the combustion tank 6 to form high-temperature gas, the high-temperature gas generated after combustion flows uniformly to the first branch pipe 11 and the second branch pipe 14 through the main pipe 8 and the gas distribution valve 10, the second branch pipe 14 guides the high-temperature gas into the treatment chamber 16, and the flow direction of the gas is ensured to correspond to the adsorption tank 17 which is not in operation, at this time, the high-temperature gas flows to the first gas outlet pipe 2 through the interlayer chamber 21 in the adsorption tank 17, and the high-temperature gas heats the adsorption tank 17 in the flowing process, so that the temperature of the adsorbent 22 in the inner chamber 23 is increased, the adsorbent 22 forms a precipitation effect under the high temperature effect, so that the adsorbed VOC is re-precipitated, the precipitated gas flows to the material guiding pipe 13 and is guided back to the cyclone separator 4 in the combustion tower 7 through the material guiding pipe 13, the gas is a high-concentration VOC gas, and the gas passes through the heat exchanger 12 when flowing through the material guiding pipe 13, the first branch pipe 11 is connected with the heat exchanger 12, so that part of the high-temperature gas is guided into the heat exchanger 12, the VOC gas and the high-temperature gas generate the heat exchange effect in the heat exchanger 12, so that the VOC gas is heated again, the temperature of the VOC gas is further increased, the condensation phenomenon of the VOC gas in the conveying process is effectively avoided, the VOC gas keeps a complete gas state when flowing into the cyclone separator 4 and the combustion box 6, and the VOC gas is mixed with the fuel gas after entering the combustion box 6, and is decomposed at high temperature in the combustion process, in order to accomplish the effective processing to VOC gas to realize the separation processing of whole waste gas, two adsorption tanks 17 in the concentration tower 1 alternate use, one carries out the adsorptive separation of waste gas, and another regenerates and combustion process, has both guaranteed concentration tower 1 efficient separating action, the effectual burning of accomplishing VOC decomposes again.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a timber drying kiln exhaust treatment device, includes concentrating tower (1) and combustion tower (7), its characterized in that: the concentrating tower (1) is positioned on one side of a combustion tower (7), a second air outlet pipe (9) is installed at the top end of the concentrating tower (1), a waste gas inlet pipe (3) is installed at a position close to the bottom end on the outer wall of one side of the concentrating tower (1), a first air outlet pipe (2) is installed at a position above the waste gas inlet pipe (3) on the outer walls of the two sides of the concentrating tower (1), two sealing partition plates (18) are welded inside the concentrating tower (1), the sealing partition plates (18) divide the inside of the concentrating tower (1) into a treatment cavity (16) and two buffer cavities (20), ports of the waste gas inlet pipe (3) and the second air outlet pipe (9) are respectively connected with the two buffer cavities (20), the treatment cavity (16) is positioned between the two sealing partition plates (18), and two adsorption tanks (17) are installed inside the treatment cavity (16), the port of the two first air outlet pipes (2) is respectively located at the position between the bottom ends of the two adsorption boxes (17) and the sealing partition plate (18), the top ends and the bottom ends of the two adsorption boxes (17) are respectively provided with an exhaust valve (15) and an air inlet valve (19), the ports of the exhaust valve (15) and the air inlet valve (19) are respectively connected with the two buffer cavities (20), the adsorption boxes (17) are internally provided with interlayer cavities (21) and inner cavities (23), the inner cavities (23) are filled with adsorbents (22), the combustion tower (7) is internally provided with a cyclone separator (4) and a combustion box (6), the combustion box (6) is located above the cyclone separator (4), the position of the bottom of the combustion box (6) located at one side of the cyclone separator (4) is provided with a gas inlet pipe (5), and the outer wall of one side of the combustion tower (7) is provided with a gas separating valve (10) and a heat exchanger (12), the gas distributing valve (10) is positioned above the heat exchanger (12), a main pipe (8) is connected between the gas distributing valve (10) and the combustion tower (7), a first branch pipe (11) and a second branch pipe (14) are respectively connected between the gas distributing valve (10) and the heat exchanger (12) and between the gas distributing valve (10) and the treatment cavity (16), and a material guide pipe (13) is connected between the heat exchanger (12) and the adsorption box (17).

2. The wood drying kiln waste gas treatment device according to claim 1, characterized in that: an exhaust port is arranged on the heat exchanger (12).

3. The wood drying kiln waste gas treatment device according to claim 1, characterized in that: the material guide pipe (13) and the second branch pipe (14) are respectively provided with a three-way valve, each three-way valve is provided with two air outlets, and the two air outlets respectively correspond to the positions of the two adsorption boxes (17).

4. The wood drying kiln waste gas treatment device according to claim 1, characterized in that: and a sealing side plate is welded between the two adsorption boxes (17).

5. The wood drying kiln waste gas treatment device according to claim 1, characterized in that: and gas guide pipes are connected between the cyclone separator (4) and the combustion box (6) and between the cyclone separator and the heat exchanger (12).