Oil fume purification treatment equipment and method

Abstract

The cooking fume purification treatment equipment comprises a cooking fume treatment device and an electric control device, the cooking fume treatment device comprises a shell and a purification part, the electric control device is arranged on the shell, and the shell is provided with an air inlet side and an air outlet side; the purification part comprises a plurality of air outlet parts, a plurality of air inlet parts, a catalytic decomposition part and a wind shield which are all arranged in the shell; the multiple air outlet parts are arranged on the peripheral wall of the catalytic decomposition part, air inlets of the air outlet parts face the catalytic decomposition part, air outlets of the air outlet parts face the air outlet side, and a rear cavity is formed between the air outlets and the air outlet side; the multiple air inlet parts are arranged at the top and the side edge of the catalytic decomposition part and between every two adjacent air outlet parts, the air inlet end faces the air inlet side, and a front cavity is formed between the air inlet end and the air inlet side; the wind shield is arranged on the surface, facing the air outlet side, of the catalytic decomposition part, separates the rear cavity from the catalytic decomposition part and seals one end, facing the rear cavity, of the air inlet part, and openings with the same number as the air outlet parts are formed in the wind shield; and the catalytic decomposition part is electrically connected with the electric control device.

Description

Technical Field

[0001] The present invention relates to the field of fume purification technology, and specifically, to a fume purification treatment device and method. Background Art

[0002] With the development of social economy and the improvement of residents' living standards, the problem of pollution control of cooking fumes in the kitchens of the catering industry has attracted increasing attention. Generally, the treatment method of general fume purification equipment is a direct-through type, that is, after the fume waste gas enters the fume purification equipment from the air inlet, the fume waste gas will pass through a plurality of purification parts arranged in parallel inside the fume equipment to decompose the fume. The decomposed fume waste gas is discharged from the air outlet, as shown in the attached Figure 1 "A Structure in a Fume Purification Equipment" disclosed in Chinese Patent CN108744823.

[0003] However, currently Figure 1 When the air enters from the air inlet 11 in the disclosed structure, due to the limited volume inside the fume purification equipment, after the fume waste gas continuously enters the fume purification equipment, more fume waste gas will accumulate inside the fume purification equipment. Since gas molecules will continuously perform random motion, some un-decomposed fume waste gas molecules will diffuse into the purified gas, resulting in that this part of the fume waste gas does not pass through the 2-7 purification parts for treatment and decomposition, and this part of the fume waste gas will directly follow the purified gas and be discharged from the air outlet 12, thus causing air pollution. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a fume purification treatment device, The object of the present invention is achieved through the following solutions: A fume purification treatment equipment includes a fume treatment device and an electric control device. The fume treatment device includes a housing and a purification part. The electric control device is arranged in the housing. The housing has an air inlet side and an air outlet side; the purification part includes a plurality of air outlet parts, a plurality of air inlet parts, a catalytic decomposition part and a wind baffle. The plurality of air outlet parts, the plurality of air inlet parts, a catalytic decomposition part and a wind baffle are all arranged in the housing; the plurality of air outlet parts surround the peripheral wall of the catalytic decomposition part. The air inlet of the air outlet part faces the catalytic decomposition part, the air outlet of the air outlet part faces the air outlet side, and there is a rear cavity between the air outlet and the air outlet side; the plurality of air inlet parts are arranged on the top, side and between two adjacent air outlet parts of the catalytic decomposition part. The air inlet end of the air inlet part faces the air inlet side, and there is a front cavity between the air inlet end and the air inlet side; the wind baffle is arranged on the side of the catalytic decomposition part facing the air outlet side, separating the rear cavity from the catalytic decomposition part and closing one end of the air inlet part facing the rear cavity. The wind baffle is provided with openings having the same number as the air outlet parts, and each opening exposes an air outlet; the catalytic decomposition part is electrically connected to the electric control device; Among them, the oil fume waste gas enters the front cavity from the air inlet side, flows through the air inlet part from the air inlet end of the air inlet part, and flows into the catalytic decomposition part from the air inlet part. The electronic control device controls the catalytic decomposition part to perform thermal decomposition and purification on the oil fume waste gas. The purified gas flows into the air inlet of the air outlet part, flows through the air outlet part, enters the rear cavity from the air outlet, and is discharged from the air outlet side.

[0005] In one embodiment, each air outlet portion includes a plurality of hot air pipes, which are arranged around the peripheral wall of the catalytic decomposition portion, with the outlets of the hot air pipes facing the rear cavity and the inlets of the hot air pipes facing the catalytic decomposition portion.

[0006] In one embodiment, each air inlet portion includes a plurality of heat collecting plates, which are divided into two groups. The two groups of heat collecting plates are interlaced on opposite walls of two adjacent air outlet portions, so that the two groups of heat collecting plates form an oil fume channel between the two adjacent air outlet portions.

[0007] In one embodiment, the catalytic decomposition part includes a protective shell, a catalytic decomposition module, a heat recovery plate and a first thermal insulation layer. The heat recovery plate is arranged on the side of the protective shell facing the air inlet side. The catalytic decomposition module is arranged in the protective shell. The first thermal insulation layer wraps around the edge of the catalytic decomposition module. The air inlet part is connected with the interior of the catalytic decomposition module, the air outlet part is connected with the interior of the protective shell, and the catalytic decomposition module is electrically connected to the electronic control device.

[0008] In one embodiment, it also includes a fan system, which is arranged on the air inlet side. The fan system includes an adsorption device, a fan and a first temperature measuring device. The adsorption device is arranged on a side of the fan system facing the front cavity, and the fan is arranged on a side of the adsorption device away from the front cavity. The fan and the first temperature measuring device are electrically connected to the electronic control device respectively.

[0009] In one embodiment, the catalytic decomposition module includes multiple catalysts and multiple heating layers, each catalyst and each heating layer are cross-stacked, a second temperature measuring device is provided on the heating layer, and the heating layer and the second temperature measuring device are electrically connected to the electronic control device respectively.

[0010] In one embodiment, a second heat-insulating layer is further provided on a side of the housing facing the purification unit.

[0011] In one embodiment, it also includes a purification device and a protective shell. The purification device is arranged on the air outlet side. The purification device includes a purification layer and a filter. One side of the purification layer faces the purification part, and the other side of the purification layer is provided with a filter. The oil fume treatment device is arranged in the protective shell, and an insulation layer is also filled between the protective shell and the oil fume treatment device.

[0012] A method for purifying oil fume, which uses the above-mentioned oil fume purification treatment equipment to purify oil fume waste gas, includes: the oil fume waste gas enters the front cavity from the air inlet side, and then the oil fume waste gas enters the purification part from the front cavity. The electronic control device controls the catalytic decomposition part to thermally decompose and purify the oil fume waste gas. The purified gas is discharged from the purification part into the rear cavity and discharged from the air outlet side.

[0013] In one of the implementation modes, it includes the following steps: S1. The electronic control device sets the heating temperature of the heating layer to and the safety threshold temperature for heating the heating layer is T3, where the reaction temperature of the catalyst is in the range of T1 - T2. The range of should be S2. Start the heating layer. The second temperature measuring device is used to detect whether the heating temperature of the heating layer is in the range of T1 - T2. The electronic control device starts the fan to run at a speed . The fan inhales the oil fume waste gas. The first temperature measuring device measures the temperature of the oil fume waste gas. The first temperature measuring device transmits the measured temperature T of the oil fume waste gas to the electronic control device. The electronic control device judges whether the value of T is in the range of T1 - T2. It should be noted that The range of is , where is the minimum fan speed, is the maximum fan speed; When T is less than T1, the second temperature measuring device detects whether is in the range of T1 - T2. If is in the range of T1 - T2, the electronic control device controls the heating temperature of the heating layer to remain unchanged. If is less than T1, the heating temperature of the heating layer is increased to the range of T1 - T2, and at the same time, the fan speed is reduced to . If at this time , the rotation speed is kept unchanged, thereby reducing the inhaled oil fume waste gas; When T is in the range of T1 - T2, the second temperature measuring device detects whether is in the range of T1 - T2. If is in the range of T1 - T2, the electronic control device controls the heating temperature of the heating layer to remain unchanged. If is less than T1, the heating temperature of the heating layer is increased to the range of T1 - T2, and at the same time, the rotation speed of the fan is adjusted to the highest to inhale more oil fume waste gas; When T is greater than T2, the second temperature measuring device detects whether it is within the range of T1 - T2. If it is within the range of T1 - T2, the electronic control device controls the heating temperature of the heating layer to remain unchanged. If it is less than T1, the heating temperature of the heating layer 12322 is increased to the range of T1 - T2, and at the same time, the fan speed is adjusted to the maximum .

[0014] Compared with the prior art, the present invention has at least the following advantages: The oil fume waste gas flows into the air inlet part through the air inlet end of the air inlet part, and under the action of the wind baffle, the oil fume waste gas flows from the air inlet part into the catalytic decomposition part, so that the oil fume waste gas is restricted to complete a cycle of decomposition and conversion in the purification part. The decomposed gas then flows through the air outlet of the air outlet part into the rear cavity and is discharged from the air outlet side. Thus, the drawback of direct discharge is avoided, and the problem that part of the oil fume is not completely decomposed is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings: Figure 1 is the structure in an oil fume purification device disclosed in the prior art CN108744823; Figure 2 is the front perspective view of the oil fume purification treatment device of the present invention; Figure 3 is Figure 2 the rear perspective view of; Figure 4 is the front perspective view of the purification part of the oil fume purification device of the present invention; Figure 5 is Figure 4 the side perspective view in; Figure 6 is the bottom perspective view of the catalytic decomposition part of the oil fume purification device of the present invention; Figure 7 is the cross-sectional view of the oil fume treatment device; Figure 8 is another structural diagram of the catalytic decomposition module; Figure 9 is the cross-sectional view of the oil fume purification treatment device; Figure 10 is the performance curve diagram of the platinum-based catalyst in the "Preparation Method and Application of a Transition Metal-Doped Platinum-Based Catalyst" with the publication number CN118454692A in the embodiment; Figure 11 It is a flow chart of the oil fume purification treatment method; Figure 12 It is the oil fume waste gas treatment performance diagram of the present invention; Among them, the reference numerals are: 1. Oil fume treatment device; 11. Shell; 111. Air inlet side; 112. Air outlet side; 113. Rear cavity; 114. Front cavity; 115. Second heat insulation layer; 12. Purification part; 121. Air outlet part; 1211. Hot air pipe; 12111. Outlet; 12112. Inlet; 122. Air inlet part; 1221. Air inlet end; 1222. Heat collecting fins; 12221. Oil fume channel; 123. Catalytic decomposition part; 1231. Protective shell; 1232. Catalytic decomposition module; 12321. Catalyst; 12322. Heating layer; 1233. Heat recovery fin; 1234. First heat insulation layer; 124. Wind baffle; 2. Electric control device; 3. Fan system; 31. Adsorption device; 32. Fan; 4. Purification device; 41. Purification layer; 42. Filter screen; 5. Protective housing; 51. Heat insulation layer. Specific embodiments

[0016] Hereinafter, multiple embodiments of the present invention will be disclosed with reference to the drawings. For the sake of clarity, many practical details will be described together in the following description. However, it should be understood that these practical details are not used to limit the present invention. That is to say, in some embodiments of the present invention, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be shown in a simple schematic manner in the drawings.

[0017] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture as shown in the drawings. If the specific posture changes, the directional indications will also change accordingly.

[0018] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only, and do not particularly refer to the meaning of order or sequence, nor are they used to limit the present invention. They are merely used to distinguish components or operations described with the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0019] To further understand the content, features and effects of the present invention, the following embodiments are exemplified and described in detail with reference to the accompanying drawings as follows: Embodiment 1 As Figure 2 and Figure 3 shown, Figure 2 and Figure 3 are perspective views of the oil fume purification treatment equipment in the embodiment, including an oil fume treatment device 1 and an electric control device 2. The oil fume treatment device 1 includes a housing 11 and a purification part 12. The electric control device 2 is arranged in the housing 11. The housing 11 has an air inlet side 111 and an air outlet side 112; Figure 4 For and Figure 5 is a schematic structural view of the purification part 12. The purification part 12 includes a plurality of air outlet parts 121, a plurality of air inlet parts 122, a catalytic decomposition part 123 and a wind baffle 124. The plurality of air outlet parts 121, the plurality of air inlet parts 122, a catalytic decomposition part 123 and a wind baffle 124 are all arranged in the housing 11; The plurality of air outlet parts 121 surround the peripheral wall of the catalytic decomposition part 122. The air inlet of the air outlet part 121 faces the catalytic decomposition part 123, and the air outlet of the air outlet part 121 faces the air outlet side 112. A rear cavity 113 is provided between the air outlet and the air outlet side 112; The plurality of air inlet parts 122 are arranged on the top, side and between two adjacent air outlet parts 121 of the catalytic decomposition part 123. The air inlet end 1221 of the air inlet part 122 faces the air inlet side 111, and a front cavity 114 is provided between the air inlet end 1221 and the air inlet side 111; The wind baffle 124 is arranged on the side of the catalytic decomposition part 123 facing the air outlet side 112, separating the rear cavity 113 from the catalytic decomposition part 122 and closing one end of the air inlet part 122 facing the rear cavity 113. The wind baffle 124 is provided with openings having the same number as the air outlet parts 121, and each opening exposes an air outlet; Among them, the fume waste gas enters the front cavity 114 from the air inlet side 111, flows through the air inlet end 1221 of the air inlet part 122 inside the air inlet part 122, and flows from the air inlet part 122 into the catalytic decomposition part 123. The electronic control device 2 controls the catalytic decomposition part 123 to thermally decompose and purify the fume waste gas. The purified gas flows into the air inlet of the air outlet part 121, flows through the air outlet part 121, enters the rear cavity 113 from the air outlet, and is discharged from the air outlet side 112.

[0020] It should be noted that due to the function of the wind baffle 124, the fume waste gas flowing in from the air inlet part 122 will not directly flow into the rear cavity 113, but can make all the fume waste gas enter the catalytic decomposition part 123 for decomposition. The decomposed gas then flows through the air outlet of the air outlet part 121 and enters the rear cavity 113. Through the function of the wind baffle 124, the fume waste gas is restricted in the purification part 12 to complete a cycle of decomposition and conversion, avoiding the drawback that some fumes are incompletely decomposed in the direct discharge method.

[0021] Furthermore, as Figure 5 shown, each air outlet part 121 includes a plurality of hot air pipes 1211. The plurality of hot air pipes 1211 are arranged around the peripheral wall of the catalytic decomposition part 123. The outlet 12111 of the hot air pipe 1211 faces the rear cavity 113, and the inlet 12112 of the hot air pipe 1211 faces the catalytic decomposition part 123. It should be noted that after the catalytic decomposition part 123 thermally decomposes the fume waste gas, the decomposed fume gas will enter from the inlet 12112 of the hot air pipe 1211 and then flow out from the outlet 12111 through the hot air pipe 1211 to the rear cavity 113.

[0022] When the fume waste gas enters the catalytic decomposition part 123 for thermal decomposition, due to the heating and decomposition of the catalytic decomposition part 123, the temperature of the gas increases. Since the volume of the rear cavity 113 remains constant, when the thermally decomposed gas is discharged into the rear cavity 113, according to the ideal gas state equation PV = nRT, where P is the gas pressure, V is the volume, n is the number of moles of the gas, and R is the molar gas constant which is a fixed value, the temperature of the thermally decomposed gas increases, resulting in an increase in the gas pressure P of the thermally decomposed gas in the rear cavity 214. And due to the principle of molecular thermal motion, the gas diffuses from the place with high potential energy to the place with low potential energy. The thermally decomposed gas is in the rear cavity 113, making the potential energy in the rear cavity 113 greater than the potential energy on the side of the air outlet side 112 away from the purification part 12. Thus, the thermally decomposed gas will be discharged from the rear cavity 113 to the air outlet side 112 and finally discharged from the fume treatment device 1.

[0023] Furthermore, as Figure 5As shown, each air inlet portion 122 includes a plurality of heat collecting plates 1222 , and the plurality of heat collecting plates 1222 are divided into two groups. The two groups of heat collecting plates 1222 are respectively interlaced and interspersed on opposite walls of two adjacent air outlet portions 121 , so that the two groups of heat collecting plates 1222 form a cold air channel 12221 between the two adjacent air outlet portions 121 .

[0024] Among them, one end of the plurality of heat collecting sheets 1222 is interlaced in the hot air pipe 1211, and the other end is interlaced to form an oil fume channel 12221. Since the plurality of heat collecting sheets 1222 fill the space in the hot air pipe 1211, the heat transfer area is increased, so that the heat exchange area in the hot air pipe 1211 is increased, so that the gas flowing through the hot air pipe 1211 can better decompose the oil fume, further improving the decomposition efficiency. At the same time, the heat of the gas in the hot air pipe 1211 can be transferred from the heat collecting sheets 1222 in the hot air pipe 1211 to the oil fume channel 12221. As a result, the oil fume channel 12221 can transfer part of the heat energy to the oil fume exhaust gas. In this way, part of the oil fume exhaust gas is preheated and decomposed, and the energy consumption of the catalytic decomposition unit 123 for heating and decomposing the oil fume exhaust gas is correspondingly reduced.

[0025] Furthermore, if Figure 5 and Figure 6 As shown, the catalytic decomposition part 123 includes a protective shell 1231, a catalytic decomposition module 1232, a heat recovery plate 1233 and a first thermal insulation layer 1234. The heat recovery plate 1233 is arranged on the side of the protective shell 1231 facing the air inlet side 111, the catalytic decomposition module 1232 is arranged in the protective shell 1231, and the first thermal insulation layer 1234 wraps around the edge of the catalytic decomposition module 1232. The air inlet part 122 is connected to the inside of the catalytic decomposition module 1232, the air outlet part 121 is connected to the inside of the protective shell 1231, and the catalytic decomposition module 1232 is electrically connected to the electronic control device 2. Among them, the protective shell 1231 can protect the catalytic decomposition module 1232, the heat recovery plate 1233 and the first thermal insulation layer 1234. The heat recovery plate 1233 can better retain the heat of the catalytic decomposition module 1232 in the catalytic decomposition part 123 to better thermally decompose the oil fume exhaust gas; the thermal insulation layer 1234 prevents the heat of the catalytic decomposition module 1232 from dissipating, and further prevents heat loss.

[0026] Further, refer to Figure 7 The oil fume purification treatment equipment also includes a fan system 3, which is arranged on the air inlet side 111. The fan system 3 includes an adsorption device 31, a fan 32 and a first temperature measuring device. The adsorption device 31 is arranged on a side of the fan system 3 facing the front cavity 114, and the fan 32 is arranged on a side of the adsorption device 31 away from the front cavity 114. The first temperature measuring device (not shown in the figure) is arranged on the fan 32, and the fan 32 and the first temperature measuring device (not shown in the figure) are electrically connected to the electronic control device 2 respectively.

[0027] Due to the particulate matter and gaseous pollutants in the fume exhaust gas, the density of the gas is relatively large, resulting in the potential energy of the fume exhaust gas being greater than that of the air. According to the thermal motion of molecules, the fume exhaust gas will diffuse to the place with lower potential energy, so the fume exhaust gas can diffuse into the front cavity 114 of the fume purification device. Preferably, the fume purification treatment device is provided with a fan 32 to better suck the fume exhaust gas into the front cavity 114. At the same time, a first temperature measuring device (not shown in the figure) is also arranged on the fan 32, so as to detect the temperature of the sucked fume exhaust gas.

[0028] Specifically, referring to Figure 7 , the catalytic decomposition module 1232 includes a plurality of catalysts 12321 and a plurality of heating layers 12322. Each catalyst 12321 and each heating layer 12322 are cross-laminated. A second temperature measuring device (not shown in the figure) is arranged on the heating layer 12322. The heating layer 12322 and the second temperature measuring device are respectively electrically connected to the electronic control device 2.

[0029] In this embodiment, the catalyst 12321 adopts the platinum-based catalyst in the Chinese patent "Preparation Method and Application of a Transition Metal-Doped Platinum-Based Catalyst" with the publication number CN118454692A. The heating layer 12322 adopts a mixed material of graphene sheets and aluminum alloy. Since graphene has a fast heating rate and serves as the main heat-generating structure, and at the same time, based on the principle that metals have fast heat conduction, alumina contacts graphene better to transfer the temperature of the heating layer 12322 to the catalyst 12321. At the same time, each catalyst 12321 and each heating layer 12322 are cross-laminated, and the heating layers 12322 at the upper and lower ends of the catalyst 12321 can transfer heat to the catalyst 12321 sufficiently, further improving the heat conduction efficiency.

[0030] It should be noted that as Figure 8 shown, the catalytic decomposition module 1232 can also be set as a cylindrical shape. The cylindrical catalytic decomposition module 1232 includes a plurality of cylindrical catalysts 12321 and a plurality of cylindrical heating layers 12322. Each catalyst 12321 and each heating layer 12322 are cross-sleeved to form a concentric circle structure. At the same time, the catalyst 12321 has a plurality of through holes, presenting a honeycomb-shaped cylindrical structure.

[0031] Thus, the catalytic decomposition module 1232 set as a cylindrical shape can surround the heat within the catalyst 12321, and the catalyst 12321 is heated more evenly through the through holes on the catalyst 12321, thereby improving the heat conduction efficiency and reducing heat loss. A first protective layer 1234 is wrapped around the outer wall of the catalyst 12321 to further prevent heat dissipation and reduce heat loss.

[0032] Preferably, reviewFigure 7 On the side of the housing 11 facing the purification section 2, a second heat-insulating layer 115 is also provided. Among them, the second heat-insulating layer 115 further prevents the heat of the purification section 2 from dissipating and reduces the heat exchange between heat and air. The second heat-insulating layer 115 in this example can be made of aerogel.

[0033] Preferably, review Figure 7 As shown, the fume purification treatment device further includes a purification device 4 and a protective housing 5. The purification device 4 is arranged on the air outlet side 112. The purification device includes a purification layer 41 and a filter screen 42. One side of the purification layer 41 faces the purification section 12, and a filter screen 42 is provided on the other side of the purification layer 41; the fume treatment device 1 is arranged in the protective housing 5, and a heat-insulating layer 51 is filled between the protective housing 5 and the fume treatment device 1. Preferably, the purification layer 41 is made of activated carbon, so as to adsorb the fume waste gas decomposed from the purification section 12 again, and then filter the particulate matter in the gas through the filter screen 42 to reduce the fume in the gas discharged from the air outlet side 112; preferably, the fume treatment device 1 is arranged in the protective housing 5, which can reduce the excessive heat exchange between the fume treatment device 1 and the outside world and improve the decomposition efficiency of the purification section 12. More preferably, a heat-insulating layer 51 is filled between the protective housing 5 and the fume treatment device 1 to further reduce the excessive heat exchange between the fume treatment device 1 and the outside world, and the heat-insulating layer 51 is made of aerogel and foam.

[0034] In summary, refer to Figure 9 In this embodiment, when it is specifically implemented, the fan system 3 sucks the fume waste gas from the air inlet side 111 along the path A into the front cavity 114. The fume waste gas is in the front cavity 114 along the path B and enters the air inlet end 1221 of the air inlet part 122 along the path C. The fume waste gas flows through the air inlet part 122. Due to the action of the wind baffle 124, the fume waste gas flowing in from the air inlet part 122 will not directly flow into the rear cavity 113. The fume waste gas can enter the catalytic decomposition part 123 along the paths D and E entirely. The catalytic decomposition part is controlled by the electric control device to thermally decompose and purify the fume waste gas. The purified gas flows into the air inlet of the air outlet part 121 along the path F. After the purified gas flows through the air outlet part 121 along the path G, the purified gas enters the rear cavity 113 from the air outlet along the path G and is discharged from the air outlet side 112 along the path I.

[0035] The beneficial effect of this embodiment is that the fume waste gas is restricted in the purification section by the action of the wind baffle 124 to complete a cycle of decomposition and conversion. The decomposed gas then flows through the air outlet of the air outlet part 121 and enters the rear cavity 113, thus avoiding the drawback that some fume waste gas is not completely decomposed by the direct discharge method.

[0036] Embodiment Two A method for purifying oil fume, which uses the above-mentioned oil fume purification treatment equipment to purify oil fume waste gas, includes: the oil fume waste gas enters the front cavity 113 from the air inlet side 111, and then the oil fume waste gas enters the purification part 12 from the front cavity 113. The electric control device 2 controls the catalytic decomposition part 123 to thermally decompose and purify the oil fume waste gas. The purified gas is discharged from the purification part 12 into the rear cavity 114 and discharged from the air outlet side 112.

[0037] It should be noted that in this embodiment, the electric control device 2 can be controlled by a PLC device or an MCU device.

[0038] Furthermore, the oil fume purification treatment method specifically includes the following steps: S1. The electric control device 2 sets the heating temperature of the heating layer 12322 to and the safety threshold temperature for heating the heating layer 12322 is T3. Among them, the reaction temperature of the catalyst 12321 is in the range of T1 - T2, The range of ; S2. Start the heating layer 12322. The second temperature measuring device is used to detect whether the heating temperature of the heating layer 12322 is in the range of T1 - T2. The electric control device 2 starts the fan 32 to run at a speed of . The fan 32 inhales the oil fume waste gas. The first temperature measuring device measures the temperature of the oil fume waste gas. The first temperature measuring device transmits the measured oil fume waste gas temperature T to the electric control device 2. The electric control device 2 judges whether the value of T is in the range of T1 - T2. It should be noted that The range of is , among which, is the rotation speed of the fan 32, is the minimum rotation speed of the fan 32, is the maximum rotation speed of the fan 32. It should be noted that the electric control device 2 uses a PID control system to control the heating temperature of the heating layer 12322 and the rotation speed of the fan 32 . The electric control device 2 outputs the output signal of the PID control system to the heating layer 12322 and adjusts the rotation speed of the fan 32 according to the oil fume temperature T .

[0039] It should be noted that when the PID control system is used for control, the error function of the heating layer 12322 needs to be set first . The output signal of the PID control system for the heating layer 12322 is , are respectively the proportional coefficient, integral coefficient and differential coefficient in the output signal function , is a proportional value, is the integral value in the interval (0, t), is the differential value of. When the temperature T of the oil fume exhaust gas measured by the first temperature measuring device appears, the following three situations will occur: (1) When T is less than T1, since , so the above , the second temperature measuring device detects whether it is in the interval T1 - T2. If is in the interval T1 - T2, the electronic control device 2 controls the heating temperature of the heating layer 12322 to remain unchanged. If is less than T1, the heating temperature of the heating layer 12322 is increased to the interval T1 - T2. At this time, the temperature of the heating layer 12322 is , where is the heating corresponding coefficient, and at the same time, the rotational speed of the fan 32 is reduced to . If at this time , the rotational speed remains unchanged, thereby reducing the inhaled oil fume exhaust gas; (2) When T is in the range of T1 - T2, the second temperature measuring device detects whether it is in the interval T1 - T2. If is in the interval T1 - T2, the electronic control device 2 controls the heating temperature of the heating layer 12322 to remain unchanged. If is less than T1, the heating temperature of the heating layer 12322 is increased to the interval T1 - T2, and at the same time, the rotational speed of the fan 32 is adjusted to the maximum , so as to inhale more oil fume exhaust gas; (3) When T is greater than T2, since , so the above , the second temperature measuring device detects whether it is in the interval T1 - T2. If is in the interval T1 - T2, the electronic control device 2 controls the heating temperature of the heating layer 12322 to remain unchanged. At this time, let the integral term in be 0, that is . Since errors will occur when the PID control system operates, when is in the set interval T1 - T2, as the time t increases, the numerical error value of the integral term will become larger and larger, resulting in the oscillation of the controller output signal and affecting the stability of the PID control system. Therefore, the integral term Set it to 0 to avoid instability of the PID control system. If is less than T1, then increase the heating temperature of the heating layer 12322 to the range of T1 - T2. At this time, the temperature of the heating layer 12322 is , and at the same time, the rotation speed of the fan 32 is adjusted to the maximum .

[0040] The above-mentioned In specific implementation, it can be determined by the trial-and-error method or the parameter tuning method. In this embodiment, ranges from 0.5 to 2.0.

[0041] In the specific implementation of this embodiment, the catalyst 12321 uses the platinum-based catalyst in the Chinese patent "Preparation Method and Application of a Transition Metal-Doped Platinum-Based Catalyst" with the publication number CN118454692A, as Figure 10 shown. It is known that the optimal reaction catalytic temperature for the conversion rate of the platinum-based catalyst is 250°C - 280°C; When the temperature T of the oil fume waste gas measured by the first temperature measuring device (not shown in the figure) is less than 250°C, the second temperature measuring device detects whether it is within the range of 250°C - 280°C. If is within the range of 250°C - 280°C, the electronic control device 2 controls the heating temperature of the heating layer 12322 to remain unchanged. If is less than 250°C, then increase the heating temperature of the heating layer 12322 to the range of T1 - T2, and at the same time reduce the rotation speed of the fan 32 to . If at this time , then keep the rotation speed unchanged, thereby reducing the inhaled oil fume waste gas and avoiding affecting the increase in the heating temperature of the heating layer 12322 from rising; When the temperature T of the oil fume waste gas is within 250°C - 280°C, if is within the range of 250°C - 280°C, the electronic control device 2 controls the heating temperature of the heating layer 12322 to remain unchanged. If is less than 250°C, then increase the heating temperature of the heating layer 12322 to the range of 250°C - 280°C, and at the same time the rotation speed of the fan 32 is adjusted to the maximum , in order to inhale more oil fume waste gas and improve the efficiency of oil fume decomposition; When the temperature T of the oil fume waste gas T is greater than 280°C, the second temperature measuring device detects whether it is within the range of 250°C - 280°C. If Within the T1 - T2 interval, the electronic control device 2 controls the heating temperature of the heating layer 12322 unchanged. If it is less than T1, then increase the heating temperature of the heating layer 12322 to the range of 250°C - 280°C, and at the same time increase the rotational speed of the fan 32 , reduce the temperature T of the oil fume waste gas, so that the concentration T of the oil fume waste gas is between 250°C - 280°C, and react better with the catalyst 12321

[0042] It should be noted that when the temperature of the oil fume waste gas exceeds the safety threshold temperature T3, heating the heating layer 12322 at this time will damage the catalyst 12321. Therefore, it is necessary to turn off the heating layer 12322. At the same time, it is necessary to increase the rotational speed of the fan 32 to the maximum, in order to reduce the temperature T of the oil fume waste gas to the T1 - T2 interval, so that the oil fume waste gas can react better with the catalyst 12321. In this embodiment, the safety temperature threshold T3 is 320°C

[0043] In summary, as Figure 12 shown, the specific working method process in the present invention is as follows: When the oil fume purification treatment equipment starts to operate, the electronic control device 2 sets the heating temperature of the heating layer 12322 in the range of the T1 - T2 interval, and starts the heating layer 12322, so that the heating temperature of the heating layer 12322 rises. At this time, the fan 32 is in the off state and waits to be woken up by the electronic control device 2. When the heating temperature of the heating layer 12322 gradually rises from 0 degree to the T1 - T2 interval, the electronic control device 2 wakes up the fan 32 to be in the standby state. When the second temperature measuring device (not shown in the figure) measures that the heating temperature is in the T1 - T2 interval, the electronic control device 2 controls the fan 32 to rotate at a rotational speed of , inhale the oil fume waste gas into the front cavity 113. At the same time, the first temperature measuring device of the fan 32 measures the temperature T of the oil fume waste gas. When the temperature T of the oil fume waste gas measured by the first temperature measuring device, the following three situations will occur: (1) When T is less than T1, the second temperature measuring device detects whether it is in the T1 - T2 interval. If it is in the T1 - T2 interval, the electronic control device 2 controls the heating temperature of the heating layer 12322 unchanged. If it is less than T1, then increase the heating temperature of the heating layer 12322 to the T1 - T2 interval, and at the same time reduce the rotational speed of the fan 32 to . If at this time , then keep the rotational speed remain unchanged, thereby reducing the inhaled fumes and waste gas; (2) When T is between T1 and T2, the second temperature measuring device detects whether it is within the T1 - T2 range. If it is within the T1 - T2 range, the electronic control device 2 controls the heating temperature of the heating layer 12322 to remain unchanged. If it is less than T1, the heating temperature of the heating layer 12322 is increased to the T1 - T2 range, and at the same time, the rotational speed of the fan 32 is adjusted to the maximum to inhale more fumes and waste gas; (3) When T is greater than T2, the second temperature measuring device detects whether it is within the T1 - T2 range. If it is within the T1 - T2 range, the electronic control device 2 controls the heating temperature of the heating layer 12322 to remain unchanged. If it is less than T1, the heating temperature of the heating layer 12322 is increased to the T1 - T2 range, and at the same time, the rotational speed of the fan 32 is adjusted to the maximum .

[0044] The beneficial effects in this embodiment are as follows. By using the PID control system to adjust and control the heating temperature of the heating layer 12322 it is ensured that the heating temperature of the heating layer 12322 can be within the reaction temperature range of the catalyst 12321 during specific operation, enabling the catalyst 12321 to better decompose the fumes and waste gas. At the same time, the temperature T of the fumes and waste gas can be detected. If the temperature T of the fumes and waste gas is greater than the reaction temperature range of the catalyst 12321, the rotational speed of the fan 32 can be adjusted through the PID control system to cool down the fumes and waste gas. If the temperature T of the fumes and waste gas is less than the reaction temperature range of the catalyst 12321, the rotational speed of the fan 32 can be adjusted through the PID control system to control the inhalation amount of the fumes and waste gas. Since the temperature T of the fumes and waste gas does not reach the reaction temperature range of the catalyst 12321, the decomposition efficiency of the catalyst 12321 will also decrease. Therefore, it is necessary to first raise the temperature T of the fumes and waste gas to the reaction range of the catalyst 12321 through the heating layer 12322 to achieve the highest decomposition efficiency of the catalyst 12321. So, if too much fumes and waste gas are inhaled, the heating efficiency of the heating layer 12322 will slow down. Therefore, the rotational speed of the fan 32 is adjusted to control the amount of fumes inhaled and avoid inhaling too much fumes and waste gas.

[0045] The above are only embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, various modifications and variations can be made to the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. An oil fume purification and treatment device, characterized in that, It includes an oil fume treatment device (1) and an electronic control device (2). The oil fume treatment device (1) includes a housing (11) and a purification part (12). The electronic control device (2) is arranged in the housing (11). The housing (11) has an air inlet side (111) and an air outlet side (112). The purification part (12) includes a plurality of air outlet parts (121), a plurality of air inlet parts (122), a catalytic decomposition part (123) and a wind baffle (124). The plurality of air outlet parts (121), the plurality of air inlet parts (122), the catalytic decomposition part (123) and the wind baffle (124) are all arranged in the housing (11). The plurality of air outlet parts (121) surround the peripheral wall of the catalytic decomposition part (122). The air inlet of the air outlet part (121) faces the catalytic decomposition part (123), and the air outlet of the air outlet part (121) faces the air outlet side (112). A rear cavity (113) is provided between the air outlet and the air outlet side (112). The plurality of air inlet parts (122) are arranged on the top, side and between two adjacent air outlet parts (121) of the catalytic decomposition part (123). The air inlet end (1221) of the air inlet part (122) faces the air inlet side (111), and a front cavity (114) is provided between the air inlet end (1221) and the air inlet side (111). The wind baffle (124) is arranged on the side of the catalytic decomposition part (123) facing the air outlet side (112), separating the rear cavity (113) from the catalytic decomposition part (122) and closing one end of the air inlet part (122) facing the rear cavity (113). The wind baffle (124) is provided with openings having the same number as the air outlet parts (121), and each opening exposes an air outlet. The catalytic decomposition part (123) is electrically connected to the electronic control device (2). Among them, the oil fume waste gas enters the front cavity (114) from the air inlet side (111), flows through the air inlet part (122) from the air inlet end (1221) of the air inlet part (122), and flows into the catalytic decomposition part (123) from the air inlet part (122). The electronic control device (2) controls the catalytic decomposition part (123) to thermally decompose and purify the oil fume waste gas. The purified gas flows into the air inlet of the air outlet part (121), flows through the air outlet part (121), enters the rear cavity (113) from the air outlet, and is discharged from the air outlet side (112).

2. The oil fume purification treatment equipment according to claim 1, characterized in that Each air outlet part (121) includes a plurality of hot air pipes (1211). The plurality of hot air pipes (1211) are arranged around the peripheral wall of the catalytic decomposition part (123). The outlet (12111) of the hot air pipe (1211) faces the rear cavity (113), and the inlet (12112) of the hot air pipe (1211) faces the catalytic decomposition part (123).

3. The oil fume purification treatment device according to claim 1, characterized in that, Each air inlet part (122) includes a plurality of heat collecting fins (1222). The plurality of heat collecting fins (1222) are divided into two groups. The two groups of heat collecting fins (1222) are respectively interlaced and inserted on the opposite walls of two adjacent air outlet parts (121), so that the two groups of heat collecting fins (1222) form an oil fume channel (12221) between the two adjacent air outlet parts (121).

4. The oil fume purification treatment equipment according to claim 1, characterized in that, The catalytic decomposition part (123) comprises a protective shell (1231), a catalytic decomposition module (1232), a heat recovery plate (1233) and a first thermal insulation layer (1234); the heat recovery plate (1233) is arranged on a surface of the protective shell (1231) facing the air inlet side (111); the catalytic decomposition module (1232) is arranged in the protective shell (1231); the first thermal insulation layer (1234) surrounds and wraps around the edge of the catalytic decomposition module (1232); the air inlet part (122) is connected to the inside of the catalytic decomposition module (1232); the air outlet part (121) is connected to the inside of the protective shell (1231); and the catalytic decomposition module (1232) is electrically connected to the electronic control device (2).

5. The oil fume purification and treatment equipment according to claim 1, characterized in that, The device also includes a fan system (3), the fan system (3) being arranged on the air inlet side (111), the fan system (3) comprising an adsorption device (31), a fan (32) and a first temperature measuring device, the adsorption device (31) being arranged on a side of the fan system (3) facing the front cavity (114), the fan (32) being arranged on a side of the adsorption device (31) facing away from the front cavity (114), the first temperature measuring device being arranged on the fan (32), and the fan (32) and the first temperature measuring device being electrically connected to the electric control device (2) respectively.

6. The oil fume purification treatment equipment according to claim 4, characterized in that, The catalytic decomposition module (1232) comprises a plurality of catalysts (12321) and a plurality of heating layers (12322), each catalyst (12321) and each heating layer (12322) are cross-stacked, a second temperature measuring device is provided on the heating layer (12322), and the heating layer (12322) and the second temperature measuring device are respectively electrically connected to the electric control device (2).

7. The oil fume purification treatment equipment according to claim 1, wherein A second thermal insulation layer (115) is also provided on a side of the shell (11) facing the purification unit (2).

8. The oil fume purification treatment equipment according to claim 1, characterized in that, It also comprises a purification device (4) and a protective shell (5); the purification device (4) is arranged on the air outlet side (112); the purification device comprises a purification layer (41) and a filter (42); one side of the purification layer (41) faces the purification part (12); and the other side of the purification layer (41) is provided with a filter (42); the oil fume treatment device (1) is arranged in the protective shell (5), and a heat insulation layer (51) is also filled between the protective shell (5) and the oil fume treatment device (1).

9. A method for purifying oil fume, which uses the oil fume purification treatment equipment described in any one of claims 1-8 to purify oil fume waste gas, and is characterized in that, include: The cooking fume waste gas enters the front cavity (114) from the air inlet side (111), and then enters the purification section (12) from the front cavity (114). The electronic control device (2) controls the catalytic decomposition section (123) to perform thermal decomposition and purification on the cooking fume waste gas. The purified gas is discharged from the purification section (12) into the rear cavity (113) and discharged from the air outlet side (112).

10. The oil fume purification treatment method according to claim 9, characterized in that, The following steps are involved: S1. The electronic control device (2) sets the heating temperature of the heating layer (12322) according to the reaction temperature of the catalyst (12321) to be and the safety threshold temperature for heating of the heating layer (12322) is T3, where the reaction temperature of the catalyst (12321) is in the range of T1 - T2, The range should be ; S2. Activate the heating layer (12322), and the second temperature measuring device is used to detect the heating temperature of the heating layer (12322). Whether it is in the T1 - T2 interval, the electronic control device (2) activates the fan (32) to run at a rotational speed The fan (32) inhales the oil fume waste gas, and the first temperature measuring device measures the temperature of the oil fume waste gas. The first temperature measuring device transmits the measured oil fume waste gas temperature T to the electronic control device (2). The electronic control device (2) determines whether the value of T is in the T1 - T2 interval. It should be noted that The range of is , where is the rotational speed of the fan (32), is the minimum rotational speed of the fan (32), is the maximum rotational speed of the fan (32). When T is less than T1, the second temperature measuring device detects whether it is within the range of T1 - T2. If it is within the range of T1 - T2, the electric control device (2) controls the heating temperature of the heating layer (12322) to remain unchanged. If it is less than T1, the heating temperature of the heating layer (12322) is increased to the range of T1 - T2, and at the same time, the rotational speed of the fan (32) is decreased to . If at this time , the rotational speed is maintained unchanged, thereby reducing the inhaled oil fume waste gas; When T is between T1 and T2, the second temperature measuring device detects whether it is within the T1 - T2 range. If it is within the T1 - T2 range, the electronic control device (2) controls the heating temperature of the heating layer (12322) to remain unchanged. If it is less than T1, the heating temperature of the heating layer (12322) is increased to the T1 - T2 range, and at the same time, the rotational speed of the fan (32) is adjusted to the maximum to inhale more oil fume waste gas; When T is greater than T2, the second temperature measuring device detects whether it is within the range of T1 - T2. If it is within the range of T1 - T2, the electronic control device (2) controls the heating temperature of the heating layer (12322) to remain unchanged. If it is less than T1, the heating temperature of the heating layer (12322) is increased to the range of T1 - T2, and at the same time, the rotation speed of the fan system 1 is adjusted to the maximum .

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