CN110848719A

CN110848719A - Catalytic combustion device

Info

Publication number: CN110848719A
Application number: CN201911160532.0A
Authority: CN
Inventors: 任震伟
Original assignee: Jinan Zhangyun Machinery Technology Co Ltd
Current assignee: Jinan Zhangyun Machinery Technology Co Ltd
Priority date: 2019-11-23
Filing date: 2019-11-23
Publication date: 2020-02-28
Anticipated expiration: 2039-11-23
Also published as: CN110848719B

Abstract

The invention discloses a catalytic combustion device, which belongs to the technical field of catalytic combustion and comprises a shell, wherein an air inlet pipe and an air outlet pipe are fixedly connected with the shell, a heat exchanger communicated with the air inlet pipe is fixedly connected in the shell, the heat exchanger is communicated with an electric heating chamber, the electric heating chamber is communicated with a combustion chamber, the combustion chamber is communicated with a catalytic reactor, the catalytic reactor is communicated with the air outlet pipe, the heat exchanger is fixedly connected in the air outlet pipe, the air inlet pipe is simultaneously communicated with an air inlet pipe and a waste gas inlet pipe, butterfly valves are respectively arranged on the air inlet pipe and the waste gas inlet pipe, and a fan is fixedly connected with the air inlet pipe. The invention has the effect of reducing the exhaust of the tail gas which is not completely subjected to catalytic combustion reaction when just started to be discharged into the atmosphere, thereby achieving the effect of protecting the environment.

Description

Catalytic combustion device

Technical Field

The invention relates to the technical field of catalytic combustion, in particular to a catalytic combustion device.

Background

Natural gas fuel has the advantages of high calorific value and low air pollution emission, and under the general condition, the combustion of natural gas still can emit a certain amount of NO. Since NO has an influence on environmental pollution, it is necessary to reduce the amount of N0 discharged during the combustion of natural gas. Research for over ten years indicates that the catalytic combustion technology can completely solve the problems, the gas combustion can reach the standard of low emission, the zero emission is approximate, and the heat efficiency in a hearth can be effectively improved. Catalytic combustion unit refers to a device or apparatus that burns under the action of a catalyst. The catalytic combustion device has the working principle that the organic waste gas is subjected to flameless combustion at a lower ignition temperature by virtue of the catalyst, so that the organic waste gas is decomposed into nontoxic carbon dioxide and water vapor.

At present, the chinese patent application with publication number CN109945215A discloses a catalytic combustion apparatus, which comprises an organic exhaust gas source, an air inlet pipe and an exhaust pipe, wherein the other end of the air inlet pipe is connected with a heat exchanger, the air inlet pipe is provided with a dust removal filter and an exhaust gas concentration detection device, the air inlet pipe is provided with an air supply branch pipe, one end of the heat exchanger is connected with a combustion chamber, a catalyst bed is arranged in the combustion chamber, one end of the combustion chamber is connected with a heat return pipe for high-temperature flue gas, and the exhaust pipe is provided with a circulation branch. The structure is simple, the use is convenient, the gas supply branch pipe is matched with the waste gas concentration detection device for use, the concentration of the organic waste gas is diluted, the temperature of the organic waste gas is reduced, and the explosion-proof pressure relief is realized; the double-layer structure of the outer wall of the combustion chamber can prevent scalding personnel and save energy, and the organic waste gas at the air inlet pipeline can fully react with the catalyst bed through the air dispersing cover; the heat exchanger ensures the recovery and utilization of waste heat and reduces the energy consumption of the catalytic combustion device.

The above prior art solutions have the following drawbacks: the catalytic combustion reaction can be completely oxidized after reaching a certain temperature, but the preheating utilization rate in the boiler tail gas is higher, so that the temperature of the flue gas before entering the catalytic combustion device does not reach the optimal temperature, and the air between catalytic combustion reactions is preheated by utilizing the waste heat generated by the combustion of the flue gas. However, when the catalytic combustion apparatus is just started, the temperature of the boiler exhaust gas does not reach the optimal combustion temperature, so that the reaction is incomplete, the temperature of the exhaust gas after catalytic combustion is relatively low, and the boiler exhaust gas cannot be heated to the optimal reaction temperature, so that a large amount of exhaust gas which is not completely subjected to the catalytic combustion reaction is discharged into the atmosphere when the catalytic combustion apparatus is just started, and environmental pollution is caused.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a catalytic combustion device for reducing exhaust gas which is not completely subjected to catalytic combustion reaction and is discharged into the atmosphere when the catalytic combustion device is just started.

The above object of the present invention is achieved by the following technical solutions: the utility model provides a catalytic combustion device, includes the casing, casing fixedly connected with intake pipe and outlet duct, the heat exchanger of fixedly connected with and intake pipe intercommunication in the casing, the heat exchanger intercommunication has the electric heating chamber, the electric heating chamber intercommunication has the combustion chamber, the combustion chamber intercommunication has catalytic reactor, catalytic reactor and outlet duct intercommunication, heat exchanger fixed connection is in the outlet duct, the intake pipe intercommunication has the air to advance to manage and waste gas advances to manage simultaneously, the air advances to manage and waste gas advances to manage and all installs the butterfly valve, intake pipe fixedly connected with fan.

By adopting the technical scheme, when the catalytic combustion device is started, the butterfly valve on the waste gas inlet pipe is closed, the butterfly valve on the air inlet pipe is opened, and then the fan is started to enable air to enter the catalytic combustion device from the air inlet pipe; then the electric heating chamber is started, the electric heating chamber heats the air, the hot air preheats the catalytic combustion device, the heat exchanger, the combustion chamber and the catalytic reactor reach or approach the optimal reaction temperature, then a butterfly valve of a waste gas inlet pipe is opened, waste gas and air are mixed and enter the catalytic combustion device, the heat exchanger and the electric heating chamber are used for heating the waste gas and the air, the waste gas and the air are enabled to completely react in the combustion chamber and the catalytic reactor, the exhaust gas which is not completely subjected to catalytic combustion reaction when the catalytic combustion reaction is just started is reduced and discharged into the atmosphere, and the environment is protected. And when the reaction is stable and the residual heat of the catalytic combustion reaction is enough to heat the air and the waste gas by using the heat exchanger, the electric heating chamber is stopped to work.

The present invention in a preferred example may be further configured to: the heat exchanger comprises a shell, wherein a first inlet pipe, a second inlet pipe, a first outlet pipe and a second outlet pipe are fixedly connected to the side wall of the shell, the first inlet pipe and the first outlet pipe are fixedly connected to the side wall of the shell, the side wall of the shell is back to the back, the first inlet pipe and the first outlet pipe are coaxially arranged, the second inlet pipe and the second outlet pipe are fixedly connected to the side wall of the shell, the side wall of the shell is back to the back, the second inlet pipe and the second outlet pipe are arranged in parallel, the first inlet pipe and the second inlet pipe are vertically arranged, the first inlet pipe is communicated with a catalytic reactor, the first outlet pipe is communicated with an outlet pipe, the second inlet pipe is communicated with an air inlet pipe, the second outlet pipe is communicated with an electric heating chamber, a plate assembly is fixedly connected to the inside of the shell, a plurality of first flow cavities and second flow cavities are formed in the plate assembly, two ends of the, The outlet pipe is communicated.

Through adopting above-mentioned technical scheme, tail gas after the reaction gets into first flow cavity, then with heat energy transfer to the board subassembly, the board subassembly is with air and the waste gas of heat transfer to in the second flow cavity to heat waste gas and air.

The present invention in a preferred example may be further configured to: the heat exchanger plate is mutually backed both ends respectively fixedly connected with first connecting plate mutually, the heat exchanger plate is at the other both ends respectively fixedly connected with second connecting plate that backs on the back mutually, on same heat exchanger plate first connecting plate and second connecting plate are buckled to the direction of keeping away from each other, the heat exchanger plate is arranged the type with the mode circulation of a positive and negative and is piled up, through first connecting plate or second connecting plate fixed connection between two adjacent heat exchanger plates, forms first flowing cavity between two heat exchanger plates on the positive heat exchanger plate, and positive heat exchanger plate forms the second between two heat exchanger plates under, and the flowing direction of the fluid of first flowing cavity and second flowing cavity is perpendicular setting.

By adopting the technical scheme, the first flow cavities and the second flow cavities are alternately arranged, so that the fluid flowing in the first flow cavities and the fluid flowing in the second flow cavities can be subjected to more sufficient heat exchange, and the heat exchange efficiency of the heat exchanger is improved.

The present invention in a preferred example may be further configured to: the heat exchange plate is characterized in that a plurality of rows of flow guide blocks are fixedly connected to the side wall, which is in contact with fluid, of the heat exchange plate, the two adjacent rows of flow guide blocks are staggered, and four adjacent flow guide blocks positioned on the same surface of the heat exchange plate are in a square row type.

By adopting the technical scheme, the fluid can be forcibly shunted by the flow guide blocks when passing through the flow guide blocks, two parts of the fluid shunted by the two flow guide blocks are intersected and mixed at the position between the two flow guide blocks, and then are shunted again under the action of the lower row of flow guide blocks; when the fluid passes through the first flow cavity or the second flow cavity, the fluid enters the plurality of the flow guide blocks, so that the fluid is continuously divided, intersected, divided again and intersected under the action of the flow guide blocks, the fluid mixing in the same flow cavity is realized, the temperature difference of the fluid at two sides of the flow cavity is reduced, and the heat exchange of the heat exchanger is more uniform.

The present invention in a preferred example may be further configured to: the heat exchange plate is characterized in that a plurality of rows of flow guide grooves are formed in the side wall, in contact with fluid, of the heat exchange plate, the adjacent two rows of flow guide grooves are in a staggered position, four adjacent flow guide grooves located on the same surface of the heat exchange plate are in a square row type, and the flow guide grooves are located in the middle of four flow guide blocks.

By adopting the technical scheme, the flow resistance of the fluid can be increased because the sectional area of the fluid flow channel can be reduced due to the occurrence of the flow guide blocks, and by adopting the technical scheme, the flow guide groove is arranged between the two flow guide blocks, so that the reduction of the sectional area of the fluid flow channel is slowed down, and the flow resistance is reduced; and the flow guide grooves and the flow guide blocks increase the contact area between the fluid and the heat exchange plate, and improve the heat exchange efficiency.

The present invention in a preferred example may be further configured to: the flow guide block is a conical protrusion formed by stamping the heat exchange plate, and the flow guide groove is a conical groove left on the reverse side of the flow guide block formed by stamping the heat exchange plate.

By adopting the technical scheme, the guide block and the guide groove are more convenient to form, and the production efficiency of the heat exchange plate is improved.

The present invention in a preferred example may be further configured to: the radial cross sections of the guide blocks and the guide grooves on the same straight line are sinusoidal.

By adopting the technical scheme, the flow guide block and the flow guide groove are more streamlined, and the flow resistance received when the fluid flows is reduced.

The present invention in a preferred example may be further configured to: the heat exchange plate is provided with guide plates at intervals in the guide grooves along the flowing direction of the fluid, the guide plates are twisted by 180 degrees along the central lines of the guide plates, and one ends of the guide plates close to the fluid inlet direction are parallel to the heat exchange plate.

Through adopting above-mentioned technical scheme, fluid is shunted behind the water conservancy diversion piece, then can shunt by force once more when passing through first spiral plate, lies in first spiral plate simultaneously and mixes under the effect of spiral with the fluid of one side, then shunts once more and meets after the second spiral plate, has increased the mixture between the fluid, makes the heat exchanger heat transfer more even.

The present invention in a preferred example may be further configured to: the guide plate is rotatably connected to the heat exchange plate, and the rotating axis of the guide plate is parallel to the flowing direction of the fluid.

Through adopting above-mentioned technical scheme, the fluid can drive the guide plate when the guide plate rotates, short sealed water conservancy diversion recess can appear rotating the in-process to make the fluid mixing form various more complicated, promoted the efficiency that the fluid mixes.

The present invention in a preferred example may be further configured to: the guide plate includes axis of rotation and coaxial fixed connection in the epaxial spiral plate of rotation, the spiral plate is and twists reverse 180 with the axis of rotation, the both ends of axis of rotation are rotated and are connected with the installation piece, installation groove has been seted up along the radial both ends of axis of rotation to the installation piece, two of adjacent heat transfer board the guide piece top is contradicted in the installation groove inner wall.

Through adopting above-mentioned technical scheme, support the installation piece tightly when fixing two heat transfer boards to realized the installation of guide plate, mounting structure is simple and convenient.

In summary, the invention includes at least one of the following beneficial technical effects:

firstly, when the catalytic combustion device is started, air enters the catalytic combustion device, then the electric heating chamber is started, the electric heating chamber heats the air, the hot air preheats the catalytic combustion device, the heat exchanger, the combustion chamber and the catalytic reactor reach or approach the optimal reaction temperature, then the waste gas enters the catalytic combustion device, the heat exchanger and the electric heating chamber are used for heating the waste gas and the air, the waste gas and the air are enabled to completely react in the combustion chamber and the catalytic reactor, the exhaust gas which is not completely subjected to the catalytic combustion reaction when the catalytic combustion device is started is reduced and discharged into the atmosphere, and the environment is protected;

secondly, a plurality of rows of flow guide blocks are fixedly connected to the side wall of the heat exchange plate, which is in contact with the fluid, and the fluid enters a plurality of rows of flow guide blocks when passing through the first flow cavity or the second flow cavity, so that the fluid is ceaselessly divided, intersected, re-divided and re-intersected under the action of the re-flow guide blocks, the fluid mixing in the same flow cavity is realized, the temperature difference of the fluid at two sides of the flow cavity is reduced, and the heat exchange of the heat exchanger is more uniform;

and thirdly, a guide plate is fixedly connected in the guide groove and comprises a first spiral plate and a second spiral plate which are opposite in spiral direction, and fluid is forcibly shunted and interacted for many times under the action of the first spiral plate and the second spiral plate, so that the mixing between the fluids is increased, and the heat exchange of the heat exchanger is more uniform.

Drawings

FIG. 1 is a perspective view of the present embodiment;

FIG. 2 is a schematic structural diagram for showing a heat exchanger according to the present embodiment;

FIG. 3 is a schematic structural diagram of a display panel assembly according to the present embodiment;

fig. 4 is an exploded view of the present embodiment for illustrating a heat exchange plate;

fig. 5 is a cross-sectional view of the baffle of the present embodiment.

Reference numerals: 100. a housing; 101. an air inlet pipe; 102. an air outlet pipe; 103. a heat exchanger; 104. an electrically heated chamber; 105. a combustion chamber; 106. a catalytic reactor; 107. a fan; 108. an air inlet pipe; 109. an exhaust gas inlet pipe; 110. a butterfly valve; 200. a plate assembly; 201. a heat exchange plate; 202. a first connecting plate; 203. a second connecting plate; 204. a first flow cavity; 205. a second flow cavity; 206. a flow guide block; 207. a flow guide groove; 208. a baffle; 209. a rotating shaft; 210. a spiral plate; 211. mounting blocks; 212. installing a groove; 300. a housing; 301. a first inlet pipe; 302. a second inlet pipe; 303. a first outlet pipe; 304. a second outlet pipe; 305. a communication port.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b): as shown in fig. 1, the catalytic combustion apparatus disclosed in the present invention comprises a housing 100, the housing 100 is fixedly connected with an air inlet pipe 101 and an air outlet pipe 102, the air inlet pipe 101 is sequentially communicated with a heat exchanger 103, an electric heating chamber 104, a combustion chamber 105 and a catalytic reactor 106, the catalytic reactor 106 is communicated with the air outlet pipe 102, and the heat exchanger 103 is fixedly connected in the air outlet pipe 102. Waste gas and air generated by natural gas combustion enter from the air inlet pipe 101, and heat exchange is carried out through the electric heating chamber 104 and the heat exchanger 103 to raise the temperature, so that the optimal reaction temperature is reached. Then catalytic reaction is carried out through a combustion chamber 105 and a catalytic reactor 106, tail gas after catalytic reaction passes through a heat exchanger 103 to preheat air and waste gas, and finally the tail gas is discharged from an exhaust pipe.

As shown in fig. 1, a blower 107 is fixedly connected to the air inlet pipe 101, the air inlet pipe 101 is simultaneously communicated with an air inlet pipe 108 and an exhaust gas inlet pipe 109, and butterfly valves 110 are respectively installed on the air inlet pipe 108 and the exhaust gas inlet pipe 109. When the catalytic combustion device is started, the butterfly valve 110 on the waste gas inlet pipe 109 is closed, the butterfly valve 110 on the air inlet pipe 108 is opened, and then the fan 107 is started to enable air to enter the catalytic combustion device from the air inlet pipe 101; then the electric heating chamber 104 is started, the electric heating chamber 104 heats the air, and the hot air preheats the catalytic combustion device, so that the heat exchanger 103, the combustion chamber 105 and the catalytic reactor 106 reach or approach the optimal reaction temperature. Then, the butterfly valve 110 of the waste gas inlet pipe 109 is opened to enable the waste gas and the air to be mixed and enter the catalytic combustion device, the heat exchanger 103 and the electric heating chamber 104 are used for heating the waste gas and the air, the waste gas and the air are enabled to completely react in the combustion chamber 105 and the catalytic reactor 106, the exhaust gas which is not completely subjected to the catalytic combustion reaction when the catalytic combustion device is just started is discharged into the atmosphere, and the environment is protected. When the residual heat of the catalytic combustion reaction is sufficient to heat the air and exhaust gas by the heat exchanger 103 after the reaction is stabilized, the electric heating chamber 104 is stopped.

As shown in fig. 2, the heat exchanger 103 includes a rectangular parallelepiped housing 300. A first inlet pipe 301, a second inlet pipe 302, a first outlet pipe 303 and a second outlet pipe 304 are fixedly connected to four circumferential side walls of the housing 300. The first inlet pipe 301 and the first outlet pipe 303 are respectively and fixedly connected to the opposite side walls of the housing 300 and are arranged in parallel, the second inlet pipe 302 and the second outlet pipe 304 are respectively and fixedly connected to the opposite side walls of the housing 300 and are arranged in parallel, and the first inlet pipe 301 and the second inlet pipe 302 are arranged vertically.

As shown in fig. 2, a first inlet pipe 301 is communicated with the outlet of the catalytic reactor 106, and a first outlet pipe 303 is communicated with the outlet pipe 102. The fluid flowing into the first inlet pipe 301 is a fluid X, and the fluid X is the exhaust gas after catalytic combustion reaction. The second inlet pipe 302 communicates with the inlet pipe 101, and the second outlet pipe 304 communicates with the electric heating chamber. The fluid flowing into the second inlet pipe 302 is fluid Y, and the fluid Y is air or a mixture of air and the exhaust gas.

As shown in fig. 3, the plate assembly 200 is fixedly connected to the inside of the housing 300, and heat exchange between the fluid X and the fluid Y is performed by the plate assembly 200. Rectangular communicating ports 305 are formed in four circumferential side walls of the outer shell 300, the communicating ports 305 are smaller than the side walls of the outer shell 300, the first inlet pipe 301, the second inlet pipe 302, the first outlet pipe 303 and the second outlet pipe 304 are respectively communicated with the four communicating ports 305, and one ends, close to the outer shell 300, of the first inlet pipe 301, the second inlet pipe 302, the first outlet pipe 303 and the second outlet pipe 304 are horn-shaped. When the communication port 305 is smaller than the side wall of the housing 300, the side wall of the housing 300 has a sufficient position to wrap the board assembly 200 when the board assembly 200 is wrapped by the housing 300, so that the connection structure between the board assembly 200 and the housing 300 is more compact.

As shown in fig. 3 and 4, the plate assembly 200 comprises a plurality of heat exchanger plates 201. The two ends of the heat exchange plate 201 opposite to each other are fixedly connected with a first connecting plate 202 respectively, and the two ends of the heat exchange plate 201 opposite to each other are fixedly connected with a second connecting plate 203 respectively. The first connecting plate 202 and the second connecting plate 203 are both bent towards a direction perpendicular to the surface of the heat exchange plate 201, the surface of the heat exchange plate 201 refers to a side wall of the heat exchange plate 201 which is directly contacted with fluid to achieve a heat exchange purpose, and the first connecting plate 202 and the second connecting plate 203 on the same heat exchange plate 201 are bent towards a direction away from each other. For convenience of production, the first connecting plate 202 and the second connecting plate 203 are integrally formed with the heat exchange plate 201, and the first connecting plate 202 and the second connecting plate 203 are formed by bending the side walls of the heat exchange plate 201 through a stamping process.

As shown in fig. 3 and 4, the orientation of the heat exchange plate 201, which is bent upward by the first connection plate 202, is defined as a forward direction, and the orientation of the heat exchange plate 201, which is rotated 180 ° so that the first connection plate 202 faces downward, is defined as a reverse direction. The heat exchange plates 201 are circularly stacked in a positive-negative mode, and two adjacent heat exchange plates 201 are fixedly connected through a first connecting plate 202 or a second connecting plate 203. From top to bottom, a first flow cavity 204 is formed between one forward heat exchanger plate 201 and one reverse heat exchanger plate 201. From top to bottom, a reverse heat exchanger plate 201 and a forward heat exchanger plate 201 form a second flow cavity 205 therebetween. Two ends of the first flow cavity 204 are respectively communicated with a first inlet pipe 301 and a first outlet pipe 303, and the fluid X passes through the first flow cavity 204; the two ends of the second flow cavity 205 are respectively communicated with a second inlet pipe 302 and a second outlet pipe 304, and the fluid Y passes through the second flow cavity 205.

As shown in fig. 4 and 5, a plurality of rows of flow guiding blocks 206 are fixedly connected to the side wall of the heat exchange plate 201 contacting with the fluid, two adjacent rows of flow guiding blocks 206 are arranged in a staggered manner, and four adjacent flow guiding blocks 206 located on the same surface of the heat exchange plate 201 are in a diamond-shaped row type. The side wall of the heat exchange plate 201 contacting with the fluid is provided with a plurality of rows of flow guide grooves 207, two adjacent rows of flow guide grooves 207 are arranged in a staggered manner, four adjacent flow guide grooves 207 on the same surface of the heat exchange plate 201 are in a square row type, and the flow guide grooves 207 are located in the middle of the four flow guide blocks 206.

As shown in fig. 4 and 5, when the fluid passes through the flow guide blocks 206, the fluid is forcibly divided by the flow guide blocks 206, and the two parts of the fluid divided by the two flow guide blocks 206 are mixed at the flow guide grooves 207 and then divided again by the lower flow guide block 206. When passing through the first flow cavity 204 or the second flow cavity 205, the fluid enters the multiple rows of flow guide blocks 206 and the flow guide grooves 207, so that the fluid is continuously divided, intersected, divided again and intersected under the action of the flow guide blocks 206, the fluid in the same flow cavity is mixed, the temperature difference of the fluid at two sides of the flow cavity is reduced, and the heat exchange of the heat exchanger 103 is more uniform.

As shown in fig. 4 and 5, to facilitate the processing and forming of the heat exchange plate 201, the flow guide block 206 is a conical protrusion formed by stamping the heat exchange plate 201, and the flow guide groove 207 is a conical groove left on the reverse side of the heat exchange plate 201 after the flow guide block 206 is stamped and formed by stamping. And the radial cross sections of the guide block 206 and the guide groove 207 on the same straight line are sinusoidal, so that the guide block 206 and the guide groove 207 are more streamlined, and the flow resistance of the fluid during flowing is reduced.

As shown in fig. 4 and 5, the heat exchange plate 201 is provided with guide plates 208 at intervals in the guide grooves 207 along the fluid flowing direction. The baffle 208 includes a rotating shaft 209 and a spiral plate 210 coaxially and fixedly connected to the rotating shaft 209. The axis of rotation 209 is parallel to the direction of fluid flow. The spiral plate 210 is twisted 180 degrees with the rotating shaft 209, the two ends of the rotating shaft 209 are rotatably connected with the mounting blocks 211, the mounting blocks 211 are provided with mounting grooves 212 along the two radial ends of the rotating shaft 209, and the top ends of the two flow guide blocks 206 of the adjacent heat exchange plates 201 are abutted against the inner walls of the mounting grooves 212. When the two heat exchange plates 201 are fixed, the mounting blocks 211 are abutted tightly, so that the guide plate 208 is mounted, and the mounting structure is simple and convenient.

As shown in fig. 4 and 5, the fluid is divided after passing through the flow guide block 206, and then is forcibly divided again when passing through the first spiral plate 210, and meanwhile, the fluid on the same side of the first spiral plate 210 is mixed under the action of the spiral, and then is divided again and intersects after passing through the second spiral plate 210, so that the mixing of the fluids is increased, and the heat exchange of the heat exchanger 103 is more uniform. Meanwhile, the fluid can drive the guide plate 208 to rotate when passing through the guide plate 208, and the transient closed guide groove 207 can appear in the rotating process, so that the fluid mixing form is more various and complicated, and the fluid mixing efficiency is improved.

The specific working process of this embodiment: when the catalytic combustion device is started, the butterfly valve 110 on the waste gas inlet pipe 109 is closed, the butterfly valve 110 on the air inlet pipe 108 is opened, and then the fan 107 is started to enable air to enter the catalytic combustion device from the air inlet pipe 101; then the electric heating chamber 104 is started, the electric heating chamber 104 heats the air, the hot air preheats the catalytic combustion device, the heat exchanger 103, the combustion chamber 105 and the catalytic reactor 106 reach or approach the optimal reaction temperature, then the butterfly valve 110 of the waste gas inlet pipe 109 is opened, the waste gas and the air are mixed and enter the catalytic combustion device, the heat exchanger 103 and the electric heating chamber 104 are utilized to heat the waste gas and the air, the waste gas and the air are enabled to completely react in the combustion chamber 105 and the catalytic reactor 106, the exhaust gas which is not completely subjected to the catalytic combustion reaction when just started is discharged into the atmosphere, and the environment is protected. When the residual heat of the catalytic combustion reaction is sufficient to heat the air and exhaust gas by the heat exchanger 103 after the reaction is stabilized, the electric heating chamber 104 is stopped.

After the fluid is fed into the heat exchanger 103, the fluid is forcedly divided by the flow guide blocks 206 when passing through the flow guide blocks 206, two parts of the fluid divided by the two flow guide blocks 206 are intersected and mixed at the position between the two flow guide blocks 206, and then are divided again under the action of the lower row of flow guide blocks 206; when passing through the first flow cavity 204 or the second flow cavity 205, the fluid enters the plurality of discharge guide blocks 206, so that the fluid is continuously divided, intersected, divided again and intersected under the action of the re-guide blocks 206, the fluid mixing in the same flow cavity is realized, the temperature difference of the fluid at two sides of the flow cavity is reduced, and the heat exchange of the heat exchanger 103 is more uniform. Meanwhile, the diversion and intersection conditions are intensified by the action of the diversion plate 208, and the heat exchange efficiency of the heat exchanger 103 is increased.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides a catalytic combustion device, includes casing (100), casing (100) fixedly connected with intake pipe (101) and outlet duct (102), heat exchanger (103) that fixedly connected with and intake pipe (101) communicate in casing (100), its characterized in that: the heat exchanger (103) is communicated with an electric heating chamber (104), the electric heating chamber (104) is communicated with a combustion chamber (105), the combustion chamber (105) is communicated with a catalytic reactor (106), the catalytic reactor (106) is communicated with an air outlet pipe (102), the heat exchanger (103) is fixedly connected in the air outlet pipe (102), the air inlet pipe (101) is simultaneously communicated with an air inlet pipe (108) and a waste gas inlet pipe (109), butterfly valves (110) are respectively installed on the air inlet pipe (108) and the waste gas inlet pipe (109), and the air inlet pipe (101) is fixedly connected with a fan (107).

2. A catalytic combustion unit as claimed in claim 1, wherein: the heat exchanger (103) comprises a shell (300), a first inlet pipe (301), a second inlet pipe (302), a first outlet pipe (303) and a second outlet pipe (304) are fixedly connected to the side wall of the shell (300), the first inlet pipe (301) and the first outlet pipe (303) are respectively and fixedly connected to the opposite side wall of the shell (300) and coaxially arranged, the second inlet pipe (302) and the second outlet pipe (304) are respectively and fixedly connected to the opposite side wall of the shell (300) and parallelly arranged, the first inlet pipe (301) and the second inlet pipe (302) are vertically arranged, the first inlet pipe (301) is communicated with a catalytic reactor (106), the first outlet pipe (303) is communicated with an outlet pipe (102), the second inlet pipe (302) is communicated with an inlet pipe (101), the second outlet pipe (304) is communicated with an electric heating chamber (104), and a plate assembly (200) is fixedly connected to the inside of the shell (300), the plate component (200) is provided with a plurality of first flow cavities (204) and second flow cavities (205), two ends of each first flow cavity (204) are respectively communicated with a first inlet pipe and a first outlet pipe (301 and 303), and two ends of each second flow cavity (205) are respectively communicated with a second inlet pipe and a second outlet pipe (302 and 304).

3. A catalytic combustion unit according to claim 2, wherein: the plate assembly (200) comprises a plurality of heat exchange plates (201), the two opposite ends of the heat exchange plates (201) are respectively and fixedly connected with a first connecting plate (202), the other two opposite ends of the heat exchange plate (201) are respectively and fixedly connected with a second connecting plate (203), the first connecting plate (202) and the second connecting plate (203) on the same heat exchange plate (201) are bent towards the direction away from each other, the heat exchange plates (201) are circularly stacked in a positive-negative mode, two adjacent heat exchange plates (201) are fixedly connected through a first connecting plate (202) or a second connecting plate (203), a first flowing cavity (204) is formed between the two heat exchange plates (201) on the upper side of the positive heat exchange plate (201), a second flowing cavity (205) is formed between the two heat exchange plates (201) on the lower side of the positive heat exchange plate (201), and the flowing directions of fluids in the first flowing cavity (204) and the second flowing cavity (205) are vertically arranged.

4. A catalytic combustion unit according to claim 3, wherein: the heat exchange plate is characterized in that a plurality of rows of flow guide blocks (206) are fixedly connected to the side wall, in contact with fluid, of the heat exchange plate (201), two adjacent rows of flow guide blocks (206) are staggered, and four adjacent flow guide blocks (206) located on the same surface of the heat exchange plate (201) are in a square row type.

5. A catalytic combustion unit according to claim 4, wherein: the heat exchange plate is characterized in that a plurality of rows of flow guide grooves (207) are formed in the side wall, in contact with fluid, of the heat exchange plate (201), two adjacent rows of flow guide grooves (207) are staggered, four adjacent flow guide grooves (207) located on the same surface of the heat exchange plate (201) are arranged in a square shape, and the flow guide grooves (207) are located in the middle of four flow guide blocks (206).

6. A catalytic combustion unit according to claim 5, wherein: the flow guide block (206) is a conical protrusion formed by stamping the heat exchange plate (201), and the flow guide groove (207) is a conical groove left on the reverse side of the flow guide block (206) formed by stamping the heat exchange plate (201).

7. A catalytic combustion unit according to claim 6, wherein: the radial cross sections of the guide block (206) and the guide groove (207) on the same straight line are sinusoidal.

8. A catalytic combustion unit according to claim 7, wherein: the heat exchange plate (201) is provided with guide plates (208) at intervals in the guide groove (207) along the flowing direction of the fluid, the guide plates (208) are twisted by 180 degrees along the central line, and one end of each guide plate (208) close to the fluid inlet direction is parallel to the heat exchange plate (201).

9. A catalytic combustion unit according to claim 8, wherein: the guide plate (208) is rotatably connected to the heat exchange plate (201), and the rotation axis of the guide plate (208) is parallel to the flow direction of the fluid.

10. A catalytic combustion unit as claimed in claim 9, wherein: guide plate (208) include axis of rotation (209) and spiral plate (210) of coaxial fixed connection on axis of rotation (209), spiral plate (210) are and twist reverse 180 with axis of rotation (209), the both ends of axis of rotation (209) are rotated and are connected with installation piece (211), installation piece (211) have seted up mounting groove (212) along axis of rotation (209) radial both ends, two of adjacent heat transfer board (201) stream guide piece (206) top is contradicted in mounting groove (212) inner wall.