TWI779737B - Exhaust gas treatment equipment that can improve filtration efficiency - Google Patents

Abstract

An exhaust gas treatment device capable of improving filtration performance, comprising a water washing unit, a dust removal unit connected to the water washing unit, and a demisting unit for removing moisture. The water washing unit includes a first cavity defining a washing space and having an inlet, and a two-fluid spray head installed on the inlet. The two-fluid spray head has a liquid guiding element suitable for introducing cleaning liquid into the flushing space, and an air guiding element suitable for forming mist in the flushing space. The dust removal unit includes a main body defining a separation space, a first spray head for making the cleaning liquid adhere to fine particles in the separation space, a stator mechanism fixed to the main body, a rotor mechanism that can rotate relative to the stator mechanism, A grid plate arranged in the separation space, and a plurality of filter balls arranged on the grid plate.

Description

Exhaust gas treatment equipment that can improve filtration efficiency

The invention relates to a treatment device for by-products of industrial pollution, in particular to a waste gas treatment device that can improve the filtration efficiency.

Referring to Fig. 1, it is an existing exhaust gas treatment equipment 1, comprising an inlet washing unit 11 communicated with the front-end manufacturing equipment (not shown), a reaction chamber arranged downstream of the inlet washing unit 11 and communicated with the inlet washing unit 11 Unit 12, an outlet washing unit 13 arranged downstream of the reaction unit 12 and communicated with the reaction unit 12, and a water tank 14 suitable for receiving washing wastewater.

The inlet washing unit 11 is suitable for introducing an external water source, and using direct spraying of water to make the waste gas react with water initially, so as to remove water-soluble or water-reactive components in the waste gas. Then, the waste water produced after washing will be guided into the water tank 14 . The reaction unit 12 is used for thermally decomposing the waste gas, so as to separate out the components in the waste gas that are heated and produce crystals. The crystalline salt produced after the separation of some components can be directly scraped off physically, and additional targeted treatment can be carried out. The outlet washing unit 13 is also suitable for introducing an external water source to wash the waste gas after thermal decomposition reaction to further remove water-soluble or water-reactive components in the waste gas. The waste water after cleaning the exhaust gas is also guided to the water tank 14 and discharged after specific treatment, or re-introduced into the inlet washing unit 11 or the outlet washing unit 13 for reuse.

However, at present, the relevant processes at the upstream end are becoming more and more advanced, and the exhaust gas generated may also contain more complex components, especially fine particles (especially PM2.5) that will cause harmful effects on the human body, making it difficult to use simple washing And reaction removal, so if it is necessary to meet the necessary treatment of the upstream process, it is necessary to further optimize the treatment efficiency for fine particles.

Therefore, the purpose of the present invention is to provide an exhaust gas treatment device that can effectively improve the separation performance for fine particles and can improve the filtration performance.

Therefore, the exhaust gas treatment equipment that can improve the filtration efficiency of the present invention includes a water washing unit, a dust removal unit connected downstream of the water washing unit, and a demister unit connected downstream of the dust removal unit.

The water washing unit includes a first cavity defining a flushing space and having an inlet connected to the flushing space, and a two-fluid spray head installed on the inlet. The two-fluid spray head has a liquid guiding element suitable for introducing cleaning liquid into the flushing space, and a gas guiding element spaced from the liquid guiding element and suitable for introducing gas into the flushing space to form mist droplets together with the cleaning liquid pieces.

The dust removal unit is connected to the downstream of the water washing unit, and includes a main body connected to the first cavity and defining a separation space connected to the flushing space, and a body disposed between the flushing space and the separation space and having A plurality of grids with through-shaped communication grooves, a plurality of filter balls arranged on the grids, a first spray head installed on the main body and used to introduce the cleaning liquid into the separation space to attach the fine particles to be separated . A stator mechanism fixed on the main body, and a rotor mechanism installed on the main body and rotatable relative to the stator mechanism to separate fine particles adhering to cleaning liquid.

The demisting unit communicates with the downstream of the dedusting unit, and includes a second cavity that defines a demisting space and has an outlet away from the dedusting unit, and a plurality of chambers in the demisting space toward the outlet. The condensing plates are arranged at intervals and staggered, and jointly divide the defogging space into a repeatedly bending path.

The effect of the present invention is that when the exhaust gas containing fine particles enters the flushing space, the contact area with the cleaning liquid can be increased due to the mist formed by the two-fluid nozzle, and the contact area and contact time of filtration can be increased through the filter balls After entering the separation space, the centrifugal mechanism generated by the rotation of the rotor mechanism relative to the stator mechanism can effectively separate the fine particles with a certain weight attached to the cleaning liquid, so the separation efficiency can indeed be improved for fine particles. This optimizes the treatment performance of the exhaust gas generated by a specific process.

Referring to Fig. 2, it is one embodiment of the waste gas treatment equipment that can improve the filtering efficiency of the present invention, this embodiment comprises a water washing unit 2, a dedusting unit 3 connected to the downstream of the water washing unit 2, and a dedusting unit 3 connected to the dedusting unit Demister unit 4 downstream of unit 3. Wherein, when this embodiment is actually implemented, the upstream is connected to a reaction unit 91 that removes specific components through a chemical reaction mechanism, and the downstream is connected to a fan unit 92 that is used to operate and generate exhaust gas after treatment. , and a sump 93 for collecting the cleaning liquid for flushing the exhaust gas is arranged below to operate. Specifically, this embodiment is one of the unit devices of a complete waste gas treatment system.

Referring to Fig. 2 to Fig. 4 at the same time, this washing unit 2 comprises a first cavity 21 that defines a flushing space 210 and has an introduction port 211 that communicates with the flushing space 210, and one is installed in the introduction port 211. Fluid spray head 22 . Wherein, the first cavity 21 also has a first viewing window 212 communicating with the flushing space 210 and spaced from the inlet 211 . The first viewing window 212 can be made of transparent material such as glass or acrylic, so as to observe the situation in the flushing space 210 when the washing unit 2 is in operation. The two-fluid spray head 22 has a liquid guide 221 suitable for introducing cleaning liquid into the flushing space 210 , and a gas guide 222 spaced from the liquid guide 221 and suitable for introducing gas into the flushing space 210 . Specifically, the liquid guide 221 of the two-fluid spray head 22 guides clean water into the flushing space 210, and the air guide 222 guides clean dry air (clean dry air, C.D.A.). In the space 210, the clean water can be atomized by air to form finer droplets, so the flushing space 210 is filled with smaller mist droplets, thereby increasing the contact between the fine particles in the exhaust gas and the cleaning solution area.

5 to 7, the dust removal unit 3 includes a main body 31 connected to the first cavity 21 and defining a separation space 310 connected to the flushing space 210, a main body 31 installed on the main body 31 and used for cleaning The liquid is introduced into the separation space 310 to adhere to the first nozzle 32 of the fine particles to be separated, a stator mechanism 33 fixed on the main body 31, a stator mechanism 33 fixed on the main body 31 and capable of rotating relative to the stator mechanism 33 for separation. A rotor mechanism 34 for attaching fine particles of cleaning liquid, a second spray head 35 disposed in the separation space 310 and relatively upstream of the first spray head 32 , a configuration between the flushing space 210 and the separation space 310 and A grid plate 36 having a plurality of through-shaped communicating grooves 360 and a plurality of filter balls 37 disposed on the grid plate 36 . The second spray head 35 sprays the cleaning liquid from top to bottom in the separation space 310, while the first spray head 32 sprays the cleaning liquid laterally to the direction of the rotating shaft of the stator mechanism 33 and the rotor mechanism 34, thereby In this separation space 310, washing liquid is sufficiently supplied from all directions.

In addition, the filter balls 37 are preferably metal balls whose diameter is larger than that of each communication groove 360 , so that the filter balls 37 will not pass through any of the communication grooves 360 and fall down. When the filter balls 37 are stacked on the grid plate 36 , through the naturally formed narrow space between the filter balls 37 , a meandering path for gas and liquid circulation can be formed.

Referring to Fig. 6 and Fig. 7 and cooperating with Fig. 3, the main body 31 has an end edge plate 311 surrounding and defining an installation opening 319 communicating with the separation space 310, an end edge plate 311 fixed to the separation space 310 and having a The positioning plate 312 extends and surrounds a flange portion 318 defining a through opening 317 , and a drain port 313 communicated with the separation space 310 and located below the stator mechanism 33 and the rotor mechanism 34 . The stator mechanism 33 is fixed on the flange portion 318 of the positioning plate 312, and has a set of inner wall plate 331 fixed on the flange portion 318 and extending toward the installation opening 319, and a set of inner wall plate 331 extending from the inner wall plate 331 to the An annular plate 332 extends radially outward from one end of the installation opening 319 , and a peripheral plate 333 extends from the annular plate 332 toward the positioning plate 312 and is spaced radially from the inner surrounding plate 331 . The rotor mechanism 34 has a sealing plate 340 blocked on the installation opening 319, a power element 341 mounted on the sealing plate 340, a base plate 342 located in the separation space 310 and connected to the power element 341, and A surrounding plate 343 extends from the base plate 342 toward the positioning plate 312 and surrounds the radially outer side of the peripheral plate 333 . Wherein, the inner wall plate 331, the peripheral plate 333, and the surrounding plate 343 are all formed with a plurality of through holes passing through in the radial direction, so that the fine particles in the exhaust gas can still be cleaned after the cleaning liquid is attached to enlarge the overall particle size. It can pass through the through hole in the radial direction.

It is worth noting that, for the stator mechanism 33 and the rotor mechanism 34 that can rotate relative to the stator mechanism 33, the surrounding plate 343 is arranged on the inner peripheral plate 331 and the outer peripheral plate as far as the rotating shaft is radially outward. 333, so that the inner panel 331, the outer panel 333, and the surrounding panel 343 sequentially form a three-layer interactive structure. Wherein, the power part 341 of the rotor mechanism 34 can specifically be a motor, so as to drive the base plate 342 and the surrounding plate 343 to rotate together. In addition to the centrifugal force generated by the rotation, the interaction between the layers is also conducive to the separation. Fine particles attached to the cleaning solution.

The inner wall 331 and the outer wall 333 of the stator mechanism 33 are made of hydrophobic material, and the surrounding plate 343 of the rotor mechanism 34 is also made of hydrophobic material. Therefore, the mist in the separation space 310 is less likely to adhere to the inner wall 331, the peripheral plate 333, and the surrounding plate 343, thereby preventing the mist from clogging the through-holes and ensuring that the mist is All can effectively pass through the through holes to exert the relative rotation interaction between the stator mechanism 33 and the rotor mechanism 34 and maintain the expected performance of separating fine particles. In addition, in addition to using hydrophobic materials as mentioned above, in order to prevent the through hole from being blocked and achieve the purpose of improving the separation performance, the inner wall 331, the peripheral plate 333, and the surrounding plate 343 can also be made of other materials and then coated. Covering with hydrophobic paint such as Teflon can also produce the same effect as directly manufacturing with hydrophobic materials, and can further reduce material costs.

Referring again to FIG. 2 and FIG. 3 , the demisting unit 4 includes a second cavity 41 defining a demisting space 410 , and a plurality of condensation plates 42 disposed in the demisting space 410 at intervals. The second cavity 41 has an outlet 411 away from the dust removal unit 3 , and a second viewing window 412 connected to the demisting space 410 . The condensing plates 42 are spaced from each other and misplaced in the direction of the outlet 411, and jointly divide the demisting space 410 into a repeatedly bent path, thereby prolonging the path length of the gas flow and increasing the connection with the condensing plates 42 The contact opportunity achieves the purpose of condensing and separating the residual water vapor in the gas on the condensation plates 42 . The second viewing window 412 can also be made of transparent material such as glass or acrylic, so as to observe the operation conditions in the defogging space 410 .

[Table I] Location Flow (LPM) @1.75kg/cm ² Particle size (μM) Two-fluid nozzle 22 0.7 18 Second nozzle 35 10 169 Stator mechanism 33, rotor mechanism 34 10 400

Referring to FIG. 7 and FIG. 2 , when this embodiment is in operation, the relative front end has been processed by the reaction unit 91 , so after entering this embodiment, the related processing of separating components without considering the chemical reaction has been done. The exhaust gas introduced from the reaction unit 91 in this embodiment will first enter the water washing unit 2 for processing. As shown in Table 1, mist droplets are formed in the flushing space 210 by the two-fluid nozzle 22, which can make the particles Fine particles whose diameter was originally below 10 microns increased to nearly 20 microns due to the attachment of cleaning fluid. Then, when the exhaust gas enters the separation space 310 through the communicating grooves 360 of the grid plate 36, the meandering path formed by the filter balls 37 will not only increase the contact area between the exhaust gas and the filter balls 37, but also Prolonging the passing time will help the cleaning solution sprayed by the second spray head 35 to continue to adhere to the fine particles to be separated, and further make the particle size reach 100 microns. Subsequently, in conjunction with the relative rotation mechanism of the stator mechanism 33 and the rotor mechanism 34, the cleaning liquid sprayed by the first spray head 32 can make the fine particles adhere to more cleaning liquid, so that the outer surface is coated with the fine particles of the cleaning liquid. The overall particle size of the particles is close to 400 microns, which is beneficial for separation by the centrifugal mechanism of the relative rotation of the stator mechanism 33 and the rotor mechanism 34, and is discharged through the drain port 313 located relatively below, and then falls to the sump 93 to complete separate.

Referring to Figure 8 and in conjunction with Figure 7, the waste gas that passes through the dedusting unit 3 and enters the demisting unit 4 must contain a certain proportion of water vapor due to the previous large amount of water washing. The exhaust gas in the space 410 will flow in the meandering path separated by the condensation plates 42, and while the flow path is extended to frequently contact the condensation plates 42, the water vapor is relatively easy to condense on the condensation plates 42 and thus be separated. In this way, the exhaust gas passing through the demisting unit 4 can be further separated from water vapor to meet the discharge standards of current relevant regulations, and then the fan unit 92 provides power to discharge the treated exhaust gas to the outside.

It should be further explained that in this embodiment, different spray patterns are produced by various types of spray heads, and the separation mechanism for the relative rotation of the stator mechanism 33 and the rotor mechanism 34 is used to improve the separation performance for fine particles. In terms of water source, there is no need to provide an overly high-pressure water source, and even a direct connection to a general tap water source can achieve the desired separation effect, making it more convenient to use and configure.

To sum up, in this embodiment of the waste gas treatment equipment of the present invention that can improve the filtration efficiency, the waste gas containing fine particles entering the flushing space 210 can improve the contact with the cleaning liquid due to the mist formed by the two-fluid nozzle 22. contact area, forming relatively large particles, after passing through the filter balls 37 to increase the contact area and contact time of the filter, then enter the separation space 310, and cooperate with the spraying of the first shower head 32 in the separation space 310 , and the centrifugal mechanism generated by the rotation of the rotor mechanism 34 relative to the stator mechanism 33 can effectively separate fine particles with a certain weight and particle size that are further attached to more cleaning liquid, so as to improve the treatment performance for fine particles. Therefore, can really reach the purpose of the present invention.

But what is described above is only an embodiment of the present invention, and should not limit the scope of the present invention. All simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of the present invention.

2: Washing unit 21: The first cavity 210: flush space 211: import port 212: First window 22: Two-fluid nozzle 221: liquid guide 222: Air guide 3: Dust removal unit 31: subject 310: Separate space 311: end edge plate 312: positioning board 313: drainage port 317: through opening 318: Flange 319: Installation port 32: The first nozzle 33: Stator mechanism 331: Inner panel 332: ring plate 333: peripheral board 34:Rotor mechanism 340: sealing plate 341: power parts 342: Substrate 343: around the board 35: Second nozzle 36: grid plate 360: Connecting slot 37: filter ball 4: Demisting unit 41: Second cavity 410: Defog space 411: export 412: second window 42: condensation plate 91:Reaction unit 92: Fan unit 93: Sink

Other features and effects of the present invention will be clearly presented in the implementation manner with reference to the drawings, wherein: Fig. 1 is a schematic diagram illustrating an existing waste gas treatment equipment; Fig. 2 is a schematic diagram illustrating an embodiment of the waste gas treatment equipment of the present invention which can improve the filtration efficiency; Fig. 3 is a three-dimensional exploded view illustrating a water washing unit, a dust removal unit, and a demisting unit of the present embodiment; Figure 4 is a side view illustrating a two-fluid spray head of the water washing unit; Fig. 5 is a perspective view, illustrates the situation that this embodiment is assembled; Fig. 6 is a partially cut-away perspective view illustrating a stator mechanism and a rotor mechanism of the dust removal unit; Fig. 7 is a schematic diagram illustrating the operation mode of this embodiment when treating waste gas; and Fig. 8 is a schematic diagram illustrating the function of the demisting unit.

2: Washing unit

21: The first cavity

210: flush space

211: import port

212: First window

3: Dust removal unit

31: subject

310: Separate space

311: end edge plate

313: drainage port

319: Installation port

33: Stator mechanism

331: Inner panel

332: ring plate

333: peripheral board

34:Rotor mechanism

340: sealing plate

341: power parts

343: around the board

35: Second nozzle

4: Demisting unit

41: Second cavity

410: Defog space

412: second window

Claims (10)

An exhaust gas treatment device capable of improving filtration efficiency, comprising: A water washing unit, comprising a first cavity defining a flushing space and having an inlet connected to the flushing space, and a two-fluid spray head installed on the inlet, the two-fluid nozzle has a nozzle suitable for cleaning A liquid guide for introducing liquid into the flushing space, and a gas guide that is spaced from the liquid guide and is suitable for introducing gas into the flushing space to form droplets together with the cleaning liquid; A dust removal unit, communicated with the downstream of the water washing unit, and includes a main body connected to the first cavity and defining a separation space connected to the flushing space, a main body disposed between the flushing space and the separation space and A grid plate with a plurality of through-shaped communication grooves, a plurality of filter balls arranged on the grid plate, a first filter installed on the main body and used to introduce the cleaning liquid into the separation space to attach the fine particles to be separated Spray head, a stator mechanism fixed on the main body, and a rotor mechanism installed on the main body and rotatable relative to the stator mechanism to separate the fine particles attached to the cleaning liquid; and A demisting unit, communicated with the downstream of the dedusting unit, and includes a second cavity that defines a demisting space and has an outlet away from the dedusting unit, and a plurality of directions in the demisting space toward the outlet The condensing plates are spaced apart from each other and arranged in dislocation, and jointly divide the defogging space into a repeatedly bent path. The exhaust gas treatment equipment that can improve the filtration efficiency as described in claim 1, wherein the main body of the dust removal unit has an end edge plate that surrounds and defines an installation port that communicates with the separation space, and an end plate that is fixed in the separation space and There is a positioning plate extending toward the mounting opening and surrounding a flange portion defining a through opening, the stator mechanism is fixed on the flange portion of the positioning plate, and has a set of An inner wall plate extending from the opening, an annular plate extending radially outward from one end of the inner wall plate close to the installation opening, and an outer periphery extending from the annular plate toward the positioning plate and radially spaced from the inner wall plate plate, the rotor mechanism has a sealing plate blocked on the installation opening, a power element installed on the sealing plate, a base plate located in the separation space and connected to the power element, and a The positioning plate extends and surrounds the surrounding plate radially outside of the peripheral plate, and the inner surrounding plate, the peripheral plate, and the surrounding plate are all formed with a plurality of through holes passing through in the radial direction. According to claim 2, the exhaust gas treatment device capable of improving the filtration efficiency, wherein the inner wall and the outer wall of the stator mechanism are made of hydrophobic material. According to claim 2, the exhaust gas treatment equipment capable of improving the filtration performance, wherein the inner wall and the outer wall of the stator mechanism are coated with hydrophobic paint. According to any one of Claims 2 to 4, the exhaust gas treatment device capable of improving the filtration efficiency, wherein the surrounding plate of the rotor mechanism is made of hydrophobic material. The exhaust gas treatment device capable of improving filtration performance as claimed in any one of claims 2 to 4, wherein the surrounding plate of the rotor mechanism is coated with a hydrophobic paint. According to claim 1, the exhaust gas treatment device capable of improving the filtration efficiency, wherein the first chamber of the water washing unit further has a first window communicating with the washing space and spaced from the introduction port. According to claim 1, the exhaust gas treatment equipment capable of improving filtration performance, wherein the dust removal unit further includes at least one second spray head disposed in the separation space and relatively upstream of the first spray head. According to claim 1, the exhaust gas treatment equipment capable of improving the filtration efficiency, wherein the second cavity of the demisting unit further has a second viewing window connected to the demisting space. According to claim 1, the exhaust gas treatment equipment capable of improving the filtration efficiency, wherein the main body of the dust removal unit further has a drainage port connected to the separation space and located under the stator mechanism and the rotor mechanism.

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