CN114653176A - Diesel engine tail gas desulfurization dust collector - Google Patents
Diesel engine tail gas desulfurization dust collector Download PDFInfo
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- CN114653176A CN114653176A CN202210404268.6A CN202210404268A CN114653176A CN 114653176 A CN114653176 A CN 114653176A CN 202210404268 A CN202210404268 A CN 202210404268A CN 114653176 A CN114653176 A CN 114653176A
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- desulfurization
- demister
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- flue gas
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 133
- 230000023556 desulfurization Effects 0.000 title claims abstract description 133
- 239000000428 dust Substances 0.000 title claims abstract description 76
- 239000007789 gas Substances 0.000 claims abstract description 144
- 238000005406 washing Methods 0.000 claims abstract description 72
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 71
- 239000003546 flue gas Substances 0.000 claims abstract description 71
- 239000007788 liquid Substances 0.000 claims abstract description 56
- 239000007921 spray Substances 0.000 claims abstract description 45
- 238000005507 spraying Methods 0.000 claims abstract description 30
- 230000008878 coupling Effects 0.000 claims description 22
- 238000010168 coupling process Methods 0.000 claims description 22
- 238000005859 coupling reaction Methods 0.000 claims description 22
- 239000000498 cooling water Substances 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000005201 scrubbing Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 238000010586 diagram Methods 0.000 description 10
- 239000003595 mist Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 239000013618 particulate matter Substances 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/18—Cleaning-out devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
- B01D2258/012—Diesel engines and lean burn gasoline engines
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Biomedical Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Combustion & Propulsion (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a diesel engine tail gas desulfurization dust collector, including: the device comprises a washing tower, a plurality of spraying layers and a plurality of demisters; the washing tower comprises a cavity, a flue gas inlet and a flue gas outlet, wherein the flue gas inlet inputs tail gas to be desulfurized and dedusted; the spraying layers are arranged in the cavity of the washing tower in parallel and at intervals and are positioned above the flue gas inlet, and the spraying layers spray desulfurization circulating liquid to the tail gas to be desulfurized and dedusted in the cavity so as to desulfurize the tail gas to be desulfurized and dedusted; the multilayer defroster is parallel to each other and the spaced sets up in the cavity of scrubbing tower, and the defroster is located the top that sprays the layer and is located the below of exhanst gas outlet, and the defroster removes dust to the tail gas of treating desulfurization dust removal after carrying out the desulfurization to make the tail gas after the exhanst gas outlet output desulfurization dust removal. The embodiment of the invention realizes an integrated device for desulfurization and dust removal of the tail gas of the diesel engine, can realize high-efficiency desulfurization and dust removal of the tail gas of the diesel engine at the same time, and has the advantages of simple structure and convenient operation.
Description
Technical Field
The invention relates to the technical field of diesel engine tail gas desulfurization and dust removal, in particular to a diesel engine tail gas desulfurization and dust removal device.
Background
The land diesel engine can generate a large amount of particulate matters and sulfur oxides in the operation process, the existing industrial waste gas desulfurization process mainly adopts a wet desulfurization process, and the particulate matters are removed mainly by a bag type dust collector. With the stricter emission regulations, the effect of cloth bag type dust removal can not meet the emission standard, and wet type electric dust removal is more common in recent years, but the investment cost of the equipment is higher and the occupied area is large.
Disclosure of Invention
The invention provides a diesel engine tail gas desulfurization and dust removal integrated device, which is simple in structure and convenient to operate and can realize high-efficiency desulfurization and dust removal of diesel engine tail gas.
The diesel engine tail gas desulfurization dust collector that the embodiment of the invention provides includes: the washing tower comprises a cavity, a flue gas inlet and a flue gas outlet, wherein the flue gas inlet inputs tail gas to be desulfurized and dedusted;
the spraying layers are arranged in the cavity of the washing tower in parallel at intervals, are positioned above the flue gas inlet, and spray desulfurization circulating liquid to the tail gas to be desulfurized and dedusted in the cavity so as to desulfurize the tail gas to be desulfurized and dedusted;
the multilayer demister is arranged in the cavity of the washing tower in parallel and at intervals, the demister is positioned above the spraying layer and below the flue gas outlet, and the demister removes dust from the tail gas to be desulfurized and dedusted after desulfurization, so that the tail gas after desulfurization and dedusting is output by the flue gas outlet.
Optionally, two layers of said demister are included;
the first layer of demister comprises a flat plate type demister, and the second layer of demister comprises a tube bundle type demister; the tube bundle type demister is positioned between the flat plate type demister and the flue gas outlet.
Optionally, a demister flushing layer is also included;
the demister washing layer is arranged in the cavity of the washing tower and is positioned above or below the demister, and the demister washing layer sprays the desulfurization circulating liquid to the demister to clean the demister.
Optionally, the demister flushing layer comprises: the device comprises a support ring, a plurality of support rods and a plurality of spray pipes; the plurality of supporting rods are uniformly distributed in the supporting ring, and the plurality of spray pipes are uniformly distributed on the plurality of supporting rods and supported by the plurality of supporting rods; the extension direction of the support rod is perpendicular to the extension direction of the spray pipe, a nozzle is arranged on the spray pipe, and the nozzle sprays the desulfurization circulating liquid to the demister.
Optionally, the demister washing layer comprises a first demister washing layer and a second demister washing layer;
the first demister washing layer is positioned between the spraying layer and the flat plate demister, and a nozzle of a spray pipe of the first demister washing layer is arranged towards the flat plate demister;
the second demister washes the layer and is located between flue gas outlet and the tube bank defroster, the nozzle of the spray tube on second demister washes the layer towards the tube bank defroster and sets up.
Optionally, the system further comprises a flue gas heat exchanger, wherein the flue gas heat exchanger comprises a first gas inlet, a first gas outlet, a second gas inlet and a second gas outlet;
the first gas inlet is used for inputting the tail gas to be desulfurized and dedusted, the flue gas heat exchanger is used for cooling the tail gas to be desulfurized and dedusted, the first gas outlet is connected with the flue gas inlet through a pipeline, and the first gas outlet is used for outputting the cooled tail gas to be desulfurized and dedusted to the flue gas inlet;
the second air inlet is connected with the flue gas outlet through a pipeline, the second air inlet is used for receiving the tail gas after desulfurization and dust removal, the flue gas heat exchanger heats the tail gas after desulfurization and dust removal, and the second air outlet is used for outputting the tail gas after desulfurization and dust removal after heating.
Optionally, the system further comprises a plate heat exchanger and a circulating pump, wherein the plate heat exchanger comprises a cooling water inlet, a cooling water outlet, a circulating liquid inlet and a circulating liquid outlet;
the first end of the circulating pump is communicated with the bottom of the washing tower through a pipeline, the second end of the circulating pump is communicated with the circulating liquid inlet through a pipeline, the circulating pump is used for conveying the desulfurization circulating liquid at the bottom of the washing tower to the plate heat exchanger through the circulating liquid inlet, the plate heat exchanger adopts cooling water input by the cooling water inlet to cool the desulfurization circulating liquid, the desulfurization circulating liquid after being cooled is conveyed to the spraying layer and the demister washing layer through the circulating liquid outlet, and the cooling water outlet is used for outputting the cooling water in the plate heat exchanger.
Optionally, the device further comprises a turbulence coupling device, the turbulence coupling device is arranged in the cavity of the washing tower, the turbulence coupling device is located between the flue gas inlet and the spraying layer, and the turbulence coupling device is used for controlling the flue gas inlet to input the tail gas to be desulfurized and dedusted to be uniformly distributed and flow between the turbulence coupling device and the spraying layer at a high speed.
Optionally, the cavity of the scrubber tower is hollow cylindrical in shape.
According to the technical scheme of the embodiment of the invention, the washing tower is arranged, the plurality of spraying layers are arranged in the cavity of the washing tower in parallel and at intervals, and the spraying layers are positioned above the flue gas inlet of the washing tower, so that the spraying layers spray desulfurization circulating liquid to the tail gas to be desulfurized and dedusted which is input into the cavity of the washing tower, and the sodium-alkali desulfurization of the tail gas to be desulfurized and dedusted is realized; and the multilayer demister is arranged in the cavity of the washing tower, the multilayer demister is parallel to each other and arranged in the cavity of the washing tower at intervals, and the demister is positioned above the spraying layer and below the flue gas outlet of the washing tower, so that the demister can remove dust from the tail gas to be desulfurized and dedusted after desulfurization, and the removal of particles from the tail gas to be desulfurized and dedusted is realized. The embodiment realizes the integrated device for efficiently desulfurizing and dedusting the tail gas of the diesel engine, the structure of the device is simple, the operation is convenient, the integrated device provided by the embodiment of the invention can realize the desulfurization efficiency of more than 98%, and the content of particulate matters is lower than 15mg/Nm 3.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a diesel engine exhaust gas desulfurization and dust removal device provided by an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another diesel engine exhaust gas desulfurization and dust removal device provided by the embodiment of the invention;
FIG. 3 is a schematic diagram of a demister flushing layer provided by an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another diesel engine exhaust gas desulfurization and dust removal device provided by the embodiment of the invention;
fig. 5 is a schematic structural diagram of another diesel engine exhaust gas desulfurization and dust removal device provided by the embodiment of the invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic structural diagram of a diesel engine tail gas desulfurization and dust removal device provided in an embodiment of the present invention, and referring to fig. 1, the diesel engine tail gas desulfurization and dust removal device includes: a washing tower 100, a multi-layer spray layer 10 and a multi-layer mist eliminator 20.
The scrubber 100 comprises a flue gas inlet 101, a cavity and a flue gas outlet 102. The flue gas inlet 101 is used for inputting the tail gas to be desulfurized and dedusted, i.e. the tail gas to be desulfurized and dedusted of the diesel engine enters the washing tower 100 through the flue gas inlet 101 of the washing tower 100. The cavity of the scrubber 100 is exemplarily illustrated in fig. 1 as a hollow cylinder, and the cavity of the scrubber 100 may have other shapes as well, which are not particularly limited.
The multilayer sprays layer 10 and is parallel to each other and the spaced sets up in the cavity of scrubbing tower 100, and each sprays layer 10 and all is located the top of flue gas inlet 101, treats desulfurization dust removal tail gas and from the below up diffusion to each sprays layer 10 and can spray desulfurization circulation liquid to the treatment desulfurization dust removal tail gas of cavity, and desulfurization circulation liquid contacts with treatment desulfurization dust removal tail gas and carries out chemical reaction in order to treat desulfurization dust removal tail gas and carry out the desulfurization. The desulfurization circulating liquid can be sodium hydroxide (NaOH), so that the desulfurization of the dedusting tail gas to be desulfurized by the sodium-alkali desulfurization process is realized. The spraying layer 10 can be supplied with liquid through external equipment, and then the spraying layer 10 can realize the spraying of the desulfurization circulating liquid through a spray head or a spray nozzle and the like. Two shower layers 10 are exemplarily illustrated in fig. 1, and the number of the shower layers 10 is not limited in this embodiment.
Multilayer defroster 20 is parallel to each other and the spaced sets up in the cavity of scrubbing tower 100, each layer defroster 20 all is located the top that sprays layer 10 and is located the below of exhanst gas outlet 102, treat after the desulfurization that desulfurization dust removal tail gas is the same from the upwards diffusion of below, pass through each layer defroster 20 in proper order, thereby each defroster 20 removes dust to the treat desulfurization dust removal tail gas after carrying out the desulfurization in proper order, realize treating getting rid of the particulate matter of desulfurization dust removal tail gas, thereby exhanst gas outlet 102 outputs the tail gas after the desulfurization dust removal. A two-layer demister 20 is exemplarily illustrated in fig. 1, and the number of layers of the demister 20 is not particularly limited in the present embodiment.
In summary, according to the technical solution of the embodiment of the present invention, by providing the washing tower 100, and providing the plurality of spraying layers 10 in the cavity of the washing tower 100, the plurality of spraying layers 10 are parallel to each other and spaced apart from each other in the cavity of the washing tower 100, each spraying layer 10 is located above the flue gas inlet 101 of the washing tower 100, thereby spraying the desulfurization circulating liquid, such as NaOH, to the tail gas to be desulfurized and dedusted which is input into the cavity of the washing tower 100 by each spraying layer 10 to realize the sodium-alkali desulfurization of the tail gas to be desulfurized and dedusted, and arranging a plurality of layers of demisters 20 in the cavity of the washing tower 100, wherein the plurality of layers of demisters 20 are arranged in the cavity of the washing tower 100 in parallel and at intervals, the mist eliminator 20 is located above the spray level 10 and below the flue gas outlet 102 of the scrubbing tower 100, thereby the defroster 20 can treat the desulfurization dust removal tail gas to remove dust after carrying out the desulfurization, realizes treating the getting rid of the particulate matter of desulfurization dust removal tail gas. Therefore, the integrated device for efficiently desulfurizing and dedusting the tail gas of the diesel engine is simple in structure and convenient to operate, the integrated device provided by the embodiment of the invention can realize the desulfurization efficiency of more than 98%, and the content of particulate matters is lower than 15mg/Nm3。
The specific configuration of the multilayer mist eliminator 20 can include a variety of configurations, and is illustrative and not limiting of the present invention.
Based on the above embodiments, optionally, with continued reference to fig. 1, the diesel exhaust gas desulfurization and dust removal device includes two mist eliminators 20 (i.e., 20-1 and 20-2), wherein one mist eliminators 20 is a plate mist eliminator (e.g., 20-1), and the other mist eliminators 20 is a tube bundle mist eliminator (e.g., 20-2), and the tube bundle mist eliminator 20-2 is located between the plate mist eliminator 20-1 and the flue gas outlet 102. The desulfurized tail gas to be desulfurized and dedusted passes through the flat plate demister 20-1, so that large fog drops and particles can be removed, then the desulfurized tail gas passes through the tube bundle demister 20, the tube bundle demister 20 generates high-speed centrifugal motion, the desulfurized tail gas and the particles collide with each other and are condensed into large liquid drops in the motion process, the fog drops and the dust are removed, and the tail gas after desulfurization and dedusting is output by the flue gas outlet 102.
Fig. 2 is a schematic structural diagram of another diesel engine exhaust gas desulfurization and dust removal device provided by the embodiment of the invention. On the basis of the above embodiments, optionally, referring to fig. 2, the diesel exhaust gas desulfurization and dust removal device further includes a demister washing layer 30. The demister washes layer 30 and sets up in the cavity of scrubbing tower 100 and is located the top or the below of defroster 20, and the defroster washes layer 30 and sprays desulfurization circulation liquid to defroster 20 in order to wash defroster 20 to wash the particulate matter that adheres to on defroster 20, guarantee the good dust removal performance of defroster 20.
Exemplarily, fig. 3 is a schematic structural diagram of a demister washing layer according to an embodiment of the present invention, and referring to fig. 3, the demister washing layer 30 includes: a support ring 301, a plurality of support rods 302 and a plurality of nozzles 303; the plurality of support rods 302 are uniformly distributed in the support ring 301, and the plurality of spray pipes 303 are uniformly distributed on the plurality of support rods 302 and supported by the plurality of support rods 302; wherein, the extending direction of the supporting rod 302 is perpendicular to the extending direction of the spray pipe 303, the spray pipe 303 is provided with a nozzle 304, and the nozzle 304 sprays the desulfurization circulating liquid to the demister 20, so as to clean the demister 20 by using the desulfurization circulating liquid. When adopting desulfurization circulation liquid to wash defroster 20, it is effectual to get rid of the particulate matter to, the desulfurization circulation liquid that adheres to on defroster 20 can also further react with the tail gas of the desulfurization dust removal of treating of process defroster 20, thereby further desulfurization at the in-process of taking off dirt, realizes high-efficient desulfurization. In addition to providing the nozzle 304 on the spray pipe 303, an opening may also be provided on the spray pipe 303 to realize spraying, and this is not particularly limited.
Different cleaning manners may be provided for the demisters 20 of different structures, with continued reference to fig. 2, and based on the above embodiments, the demister washing layer 30 optionally includes a first demister washing layer 30-1 and a second demister washing layer 30-2; the first demister washing layer 30-1 is positioned between the spraying layer 10 and the flat-plate demister 20-1, and nozzles of spray pipes of the first demister washing layer 30-1 are arranged towards the flat-plate demister 20-1; the second demister washing layer 30-2 is located between the flue gas outlet 102 and the tube bundle demister 20-2, and nozzles of spray pipes of the second demister washing layer 30-2 are arranged facing the tube bundle demister 20-2. Namely, the flat plate type demister 20-1 is sprayed with the desulfurization circulating liquid from bottom to top to wash the same, and the tube bundle type demister 20-2 is sprayed with the desulfurization circulating liquid from top to bottom to wash the same. In addition, the arrangement is that the desulfurization circulating liquid of the first demister washing layer 30-1 can wash not only the flat-plate demister 20-1 but also the bundle demister 20-2, and similarly, the desulfurization circulating liquid of the second demister washing layer 30-2 can wash not only the bundle demister 20-2,
on the basis of the foregoing embodiments, with reference to fig. 2, optionally, the diesel engine tail gas desulfurization and dust removal device further includes a flue gas heat exchanger 40, and the flue gas heat exchanger 40 includes a first gas inlet 41, a first gas outlet 42, a second gas inlet 43, and a second gas outlet 44.
The first gas inlet 41 is used for inputting the tail gas to be desulfurized and dedusted, and the flue gas heat exchanger 40 is used for cooling the tail gas to be desulfurized and dedusted; the first gas outlet 42 is connected with the flue gas inlet 101 through a pipeline, and the first gas outlet 42 is used for outputting the cooled tail gas to be desulfurized and dedusted to the flue gas inlet 101. The solubility of the sulfide is high at low temperature, and the flue gas heat exchanger 40 is arranged in the embodiment of the invention, so that the tail gas to be desulfurized and dedusted is input into the flue gas inlet 101 of the washing tower 100 through the flue gas heat exchanger 40, and the tail gas to be desulfurized and dedusted is cooled when entering the washing tower 100, thereby improving the desulfurization efficiency.
The second gas inlet 43 is connected with the flue gas outlet 102 through a pipeline, the second gas inlet 43 is used for receiving the tail gas after desulfurization and dust removal, the flue gas heat exchanger 40 heats the tail gas after desulfurization and dust removal, and the second gas outlet 44 is used for outputting the tail gas after desulfurization and dust removal after heating. The condensed water is easy to cause the white smoke phenomenon at the flue gas outlet 102, and the flue gas heat exchanger 40 is arranged in the embodiment of the invention, so that the tail gas after desulfurization and dust removal is output through the flue gas heat exchanger 40, and the tail gas after desulfurization and dust removal is heated when being output from the washing tower 100, thereby effectively improving the white smoke phenomenon.
Fig. 4 is a schematic structural diagram of another diesel engine exhaust gas desulfurization and dust removal device provided by the embodiment of the invention. On the basis of the above embodiments, referring to fig. 4, optionally, the diesel engine exhaust gas desulfurization and dust removal device further includes a plate heat exchanger 60 and a circulation pump 50, where the plate heat exchanger 60 includes a cooling water inlet 61, a cooling water outlet 62, a circulation liquid inlet 63, and a circulation liquid outlet 64.
The first end of circulating pump 50 passes through the bottom intercommunication of pipeline and scrubbing tower 100, the second end of circulating pump 50 passes through pipeline and circulation liquid import 63 intercommunication, circulating pump 50 is used for carrying the desulfurization circulating fluid of the bottom of scrubbing tower 100 to plate heat exchanger 60 through circulation liquid import 63, plate heat exchanger 60 adopts the cooling water of cooling water import 61 input to cool down the desulfurization circulating fluid, and carry the desulfurization circulating fluid after will cooling to spraying layer 10 and defroster washing layer 30 through circulation liquid export 64, cooling water export 62 is arranged in exporting the cooling water in plate heat exchanger 60. The embodiment of the invention is provided with the circulating pump 50 to recycle the desulfurization circulating liquid in the washing tower 100, and further provided with the plate heat exchanger 60 in the recycling process, so that the desulfurization circulating liquid is cooled by cooling water, the temperature of the desulfurization circulating liquid is reduced, the fresh water consumption of the desulfurization circulating liquid is reduced, the proper concentration of the desulfurization circulating liquid is ensured, and the effective desulfurization is performed on the tail gas to be desulfurized and dedusted.
Fig. 5 is a schematic structural diagram of another diesel engine exhaust gas desulfurization and dust removal device provided by the embodiment of the invention. On the basis of the above embodiments, referring to fig. 5, optionally, the diesel exhaust gas desulfurization and dust removal device further includes a turbulence coupling device 70 (e.g., a turbulence coupler), the turbulence coupling device 70 is disposed in the cavity of the washing tower 100, the turbulence coupling device 70 is located between the flue gas inlet 101 and the spray layer 10, and the turbulence coupling device 70 is configured to control the exhaust gas to be desulfurized and dust removal input by the flue gas inlet 101 to be uniformly distributed and flow between the turbulence coupling device 70 and the spray layer 10 at a high speed. Treat that desulfurization dust removal tail gas gets into scrubbing tower 100 after at first through torrent coupling device 70 promptly, torrent coupling device 70 can make and treat that desulfurization dust removal tail gas distributes more evenly and high-speed flow to make and treat desulfurization dust removal tail gas evenly distributed between torrent coupling device 70 and spray layer 10, desulfurization circulation liquid with treat that desulfurization dust removal tail gas fully contacts, realize better desulfurization effect. In addition, the desulfurization circulating liquid that falls by the top can pass through torrent coupling device 70 for certain desulfurization circulating liquid can be held on the torrent coupling device 70, thereby can further guarantee to treat the abundant desulfurization of desulfurization dust removal tail gas, realize effective desulfurization.
The working process and principle of the diesel engine tail gas desulfurization and dust removal device provided by the embodiment of the invention are explained in more detail with reference to fig. 5 as follows:
the tail gas to be desulfurized and dedusted of the diesel engine is input into the first gas inlet 41 of the flue gas heat exchanger 40, and the flue gas heat exchanger 40 cools the tail gas to be desulfurized and dedusted. The cooled tail gas to be desulfurized and dedusted is input into the flue gas inlet 101 of the washing tower 100 through the first gas outlet 42 of the flue gas heat exchanger 40, and then is uniformly distributed between the turbulence coupling device 70 and the spraying layer 10 through the turbulence coupling device 70, so that the tail gas is in full contact reaction with the desulfurization circulating liquid NaOH sprayed by the spraying layer 10, and high-efficiency desulfurization is realized. The desulfurized tail gas to be desulfurized and dedusted sequentially passes through the flat plate type demister 20 and the tube bundle type demister 20 to be efficiently dedusted, the desulfurized and dedusted tail gas is input into the second air inlet 43 of the flue gas heat exchanger 40, the flue gas heat exchanger 40 heats up the desulfurized and dedusted tail gas to avoid the white smoke phenomenon, and the second air outlet 44 of the flue gas heat exchanger 40 outputs the heated tail gas to finish the desulfurization and dedusting work. During this operation, the circulation pump 50 continuously feeds the desulfurization circulation liquid at the bottom of the washing tower 100 to the spray layer 10 and the demister washing layer 30, and the plate heat exchanger 60 continuously cools the desulfurization circulation liquid.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a diesel engine tail gas desulfurization dust collector which characterized in that includes:
the washing tower comprises a cavity, a flue gas inlet and a flue gas outlet, wherein the flue gas inlet inputs tail gas to be desulfurized and dedusted;
the spraying layers are arranged in the cavity of the washing tower in parallel at intervals, are positioned above the flue gas inlet, and spray desulfurization circulating liquid to the tail gas to be desulfurized and dedusted in the cavity so as to desulfurize the tail gas to be desulfurized and dedusted;
the multilayer demister is arranged in the cavity of the washing tower in parallel and at intervals, the demister is positioned above the spraying layer and below the flue gas outlet, and the demister removes dust from the tail gas to be desulfurized and dedusted after desulfurization, so that the tail gas after desulfurization and dedusting is output by the flue gas outlet.
2. The desulfurization and dust removal device for the tail gas of the diesel engine according to claim 1, which comprises two layers of the demisters;
the first layer of demister comprises a flat plate type demister, and the second layer of demister comprises a tube bundle type demister; the tube bundle type demister is positioned between the flat plate type demister and the flue gas outlet.
3. The desulfurization and dust removal device for the tail gas of the diesel engine according to claim 2, further comprising a demister washing layer;
the demister washing layer is arranged in the cavity of the washing tower and is positioned above or below the demister, and the demister washing layer sprays the desulfurization circulating liquid to the demister so as to clean the demister.
4. The desulfurization and dust removal device for diesel exhaust according to claim 3, wherein the demister washing layer comprises: the device comprises a support ring, a plurality of support rods and a plurality of spray pipes; the plurality of supporting rods are uniformly distributed in the supporting ring, and the plurality of spray pipes are uniformly distributed on the plurality of supporting rods and supported by the plurality of supporting rods; the extension direction of the support rod is perpendicular to the extension direction of the spray pipe, a nozzle is arranged on the spray pipe, and the nozzle sprays the desulfurization circulating liquid to the demister.
5. The desulfurization and dust removal device for the tail gas of the diesel engine according to claim 4, wherein the demister washing layer comprises a first demister washing layer and a second demister washing layer;
the first demister washing layer is positioned between the spraying layer and the flat plate demister, and a nozzle of a spray pipe of the first demister washing layer is arranged towards the flat plate demister;
the second demister washes the layer and is located between exhanst gas outlet and the tube bundle defroster, the nozzle of the spray tube on second defroster washes the layer sets up towards the tube bundle defroster.
6. The diesel engine tail gas desulfurization and dust removal device according to claim 1, further comprising a flue gas heat exchanger, wherein the flue gas heat exchanger comprises a first gas inlet, a first gas outlet, a second gas inlet and a second gas outlet;
the first gas inlet is used for inputting the tail gas to be desulfurized and dedusted, the flue gas heat exchanger is used for cooling the tail gas to be desulfurized and dedusted, the first gas outlet is connected with the flue gas inlet through a pipeline, and the first gas outlet is used for outputting the cooled tail gas to be desulfurized and dedusted to the flue gas inlet;
the second air inlet is connected with the flue gas outlet through a pipeline, the second air inlet is used for receiving the tail gas after desulfurization and dust removal, the flue gas heat exchanger heats the tail gas after desulfurization and dust removal, and the second air outlet is used for outputting the tail gas after desulfurization and dust removal after heating.
7. The desulfurization and dust removal device for the tail gas of the diesel engine according to any one of claims 1 or 3, further comprising a plate heat exchanger and a circulating pump, wherein the plate heat exchanger comprises a cooling water inlet, a cooling water outlet, a circulating liquid inlet and a circulating liquid outlet;
the first end of the circulating pump is communicated with the bottom of the washing tower through a pipeline, the second end of the circulating pump is communicated with the circulating liquid inlet through a pipeline, the circulating pump is used for conveying the desulfurization circulating liquid at the bottom of the washing tower to the plate heat exchanger through the circulating liquid inlet, the plate heat exchanger adopts cooling water input by the cooling water inlet to cool the desulfurization circulating liquid, the desulfurization circulating liquid after being cooled is conveyed to the spraying layer and the demister washing layer through the circulating liquid outlet, and the cooling water outlet is used for outputting the cooling water in the plate heat exchanger.
8. The diesel engine tail gas desulfurization and dust removal device of claim 1, further comprising a turbulence coupling device, wherein the turbulence coupling device is disposed in the cavity of the scrubber, the turbulence coupling device is located between the flue gas inlet and the spray layer, and the turbulence coupling device is configured to control the tail gas to be desulfurized and dust removed input from the flue gas inlet to be uniformly distributed and flow between the turbulence coupling device and the spray layer at a high speed.
9. The desulfurization and dust removal device for diesel engine exhaust gas as recited in claim 1, wherein the cavity of the scrubber tower is hollow cylindrical.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210404268.6A CN114653176A (en) | 2022-04-18 | 2022-04-18 | Diesel engine tail gas desulfurization dust collector |
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| CN202210404268.6A CN114653176A (en) | 2022-04-18 | 2022-04-18 | Diesel engine tail gas desulfurization dust collector |
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Application publication date: 20220624 |