CN110201477B - Environmental-friendly power plant flue gas dust removal and purification device - Google Patents

Environmental-friendly power plant flue gas dust removal and purification device Download PDF

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Publication number
CN110201477B
CN110201477B CN201910571826.6A CN201910571826A CN110201477B CN 110201477 B CN110201477 B CN 110201477B CN 201910571826 A CN201910571826 A CN 201910571826A CN 110201477 B CN110201477 B CN 110201477B
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flue gas
pipe
dust removal
power plant
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CN110201477A (en
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李桂霞
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Jinan City Investment Design Co.,Ltd.
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Jinan City Investment Design Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D50/00Combinations of methods or devices for separating particles from gases or vapours
    • B01D50/60Combinations of devices covered by groups B01D46/00 and B01D47/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/06Arrangements of devices for treating smoke or fumes of coolers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/30Technologies for a more efficient combustion or heat usage

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Of Particles Using Liquids (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The invention discloses an environment-friendly power plant flue gas dust removal and purification device, belongs to the technical field of power plant flue gas environment-friendly treatment, solves the problems of effective cooling and dust removal of flue gas, and has the technical key points that: the device comprises a flue gas dust removal cylinder, an inner cylinder body, an annular inner baffle and a cooling pipe, wherein an air inlet pipe is connected to the outer wall of the flue gas dust removal cylinder; a plurality of cooling pipes are arranged in the annular inner baffle, a ceramic filter membrane filter is arranged in the upper end of the annular inner baffle, and a draught fan is arranged at the top of the annular inner baffle; through filtering, spraying the dust removal between flue gas dust removal section of thick bamboo and interior barrel to cooperation cooling tube and heat exchange tube etc. increase heat utilization efficiency to flue gas waste heat recovery, purifying the flue gas gradually through ceramic filtration membrane filter filtration, fibre ball filtration and active carbon adsorption's mode, the effectual content that reduces dust in the flue gas after purifying, purifying effect is showing.

Description

Environmental-friendly power plant flue gas dust removal and purification device
Technical Field
The invention relates to the technical field of environment-friendly treatment of power plant flue gas, in particular to an environment-friendly dust removal and purification device for the power plant flue gas.
Background
With the change of new energy power generation technology, the energy saving mode of new energy power plants is more and more diversified. At present, a biomass direct combustion and garbage incinerator working medium combined power generation system is proposed, namely a steam-water system of a garbage incinerator is combined with a biomass direct combustion unit, and working medium power generation integration is realized. In the existing waste incinerator flue gas treatment process, a large amount of heat loss exists.
In the existing waste incinerator flue gas treatment process, a large amount of preheated flue gas is directly discharged, so that heat is wasted, economic benefits of a waste incineration power plant are lost, and the heat loss of flue gas discharged from a thermal power plant is important heat loss in production.
Meanwhile, the flue gas contains a large amount of dust, the flue gas is directly discharged into the air to pollute the atmosphere, and the temperature of the flue gas just discharged into the atmosphere is higher, so that the atmospheric temperature is easy to rise, and therefore how to effectively cool the flue gas and remove dust becomes the technical problem which needs to be solved urgently at present.
Disclosure of Invention
Aiming at the defects in the prior art, the embodiment of the invention aims to provide an environment-friendly power plant flue gas dedusting and purifying device to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
an environment-friendly power plant flue gas dust removal and purification device comprises a flue gas dust removal cylinder, an inner cylinder, an annular inner baffle and a cooling pipe, wherein the inner cylinder is arranged in the flue gas dust removal cylinder, the bottom of the inner cylinder is connected with the bottom of the flue gas dust removal cylinder, an ash collection cavity is arranged between the flue gas dust removal cylinder and the inner cylinder, an air inlet pipe is connected to the outer wall of the flue gas dust removal cylinder and communicated with the ash collection cavity, a filter screen is arranged in the ash collection cavity above the air inlet pipe, and a sprayer is arranged at the top of the filter screen; an annular inner baffle is arranged above the inner cylinder body, the bottom of the annular inner baffle is connected with the inner wall of the flue gas dust removal cylinder, a shunting cover is arranged at the bottom of the annular inner baffle, and a plurality of air inlets are formed in the shunting cover;
install a plurality of cooling tubes in the annular inner baffle, baffle upper end internally mounted has ceramic filtration membrane filter in the annular, and the draught fan is installed at baffle top in the annular, and the flue gas dust removal section of thick bamboo intussuseption in the annular outer side of inner baffle is filled with a plurality of fibre balls, and the parcel has the activated carbon layer in the fibre ball, be connected with the blast pipe on the flue gas dust removal section of thick bamboo lateral wall.
As a further scheme of the invention, the sprayer is communicated with a water supply pipe, the water supply pipe is arranged in a cavity in the inner cylinder body, the water supply pipe is connected with a water outlet of the water pump, a water inlet of the water pump is connected with a filter through a pipeline, and the filter is arranged in the liquid collecting pool.
As a further scheme of the invention, the liquid collecting tank is arranged at the bottom of the flue gas dust removal barrel, and the bottom of the ash collecting cavity is communicated with the liquid collecting tank through a return pipe.
As a further scheme of the invention, the top nozzle of the return pipe is arranged below the liquid level in the liquid collecting tank, and the filter is also arranged below the liquid level in the liquid collecting tank.
As a further scheme of the invention, the bottom of the liquid collecting tank is connected with a drain pipe, and a drain valve is arranged on the drain pipe.
As a further scheme of the invention, a demisting net is arranged above the filter screen.
As a further scheme of the invention, the air inlet is communicated with the top of the ash collecting cavity, the bottom of the cooling pipe is communicated with the liquid inlet pipe disc, the liquid inlet pipe disc is communicated with the refrigerant input pipe, the top of the cooling pipe is communicated with the liquid outlet pipe disc, and the liquid outlet pipe disc is communicated with the refrigerant output pipe.
As a further scheme of the invention, the exhaust pipe is communicated with the interior of the flue gas dust removal cylinder on the outer side of the annular inner baffle.
As a further scheme of the invention, the pipe orifice of the air inlet pipe is arranged at the bottom of the dust collecting cavity.
As a further scheme of the invention, a heat exchange coil is also arranged in the liquid collection tank.
In summary, compared with the prior art, the embodiment of the invention has the following beneficial effects:
according to the environment-friendly power plant flue gas dust removal and purification device, the flue gas is filtered and sprayed for dust removal between the flue gas dust removal cylinder and the inner cylinder, and the waste heat of the flue gas is recycled by matching with the cooling pipe, the heat exchange pipe and the like, so that the heat utilization efficiency is improved, the flue gas is gradually purified in the modes of filtering through the ceramic filtering membrane filter, filtering through the fiber balls and adsorbing through the activated carbon, the content of dust in the purified flue gas is effectively reduced, and the purification effect is obvious.
To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of a liquid inlet pipe disc in the embodiment of the invention.
FIG. 3 is a schematic structural diagram of a fiber ball in an embodiment of the invention.
Fig. 4 is a schematic structural diagram of embodiment 2 of the present invention.
Fig. 5 is a schematic structural view of an intake pipe in embodiment 2 of the present invention.
Reference numerals: 1-smoke dust removing cylinder, 2-inner cylinder, 3-dust collecting cavity, 4-air inlet pipe, 5-filter screen, 6-sprayer, 7-water supply pipe, 8-demisting net, 9-annular inner baffle, 10-return pipe, 11-liquid collecting tank, 12-filter, 13-water pump, 14-blow-off pipe, 15-blow-off valve, 16-shunt cover, 17-air inlet, 18-cooling pipe, 19-liquid inlet pipe disc, 20-refrigerant input pipe, 21-liquid outlet pipe disc, 22-refrigerant output pipe, 23-heat exchange fin, 24-ceramic filter membrane filter, 25-draught fan, 26-gas collecting cavity, 27-fiber ball, 28-activated carbon layer and 29-exhaust pipe.
Detailed Description
The technical solution of the present invention is further described with reference to the accompanying drawings and specific embodiments.
Example 1
Referring to fig. 1 to 3, an environment-friendly flue gas dust removal and purification device for a power plant comprises a flue gas dust removal cylinder 1, an inner cylinder 2, an annular inner baffle 9 and a cooling pipe 18, wherein the inner cylinder 2 is installed inside the flue gas dust removal cylinder 1, the bottom of the inner cylinder 2 is connected with the bottom of the flue gas dust removal cylinder 1, an ash collection cavity 3 is arranged between the flue gas dust removal cylinder 1 and the inner cylinder 2, an air inlet pipe 4 is connected to the outer wall of the flue gas dust removal cylinder 1, the air inlet pipe 4 is communicated with the ash collection cavity 3, a filter screen 5 is installed in the ash collection cavity 3 above the air inlet pipe 4, a sprayer 6 is arranged at the top of the filter screen 5, the sprayer 6 is communicated with a water supply pipe 7, the water supply pipe 7 is arranged in a cavity in the inner cylinder 2, the water supply pipe 7 is connected with a water outlet of a water pump 13, a water inlet of the water pump 13 is connected with the filter 12 through a pipeline, and the filter 12 is arranged in a liquid collection pool 11; the liquid collecting pool 11 is arranged at the bottom of the flue gas dust removal cylinder 1, and the bottom of the ash collecting cavity 3 is communicated with the liquid collecting pool 11 through a return pipe 10;
further, in the present invention, the top nozzle of the return pipe 10 is disposed below the liquid level in the liquid collecting tank 11, and the filter 12 is also disposed below the liquid level in the liquid collecting tank 11, so as to conveniently filter the liquid in the liquid collecting tank 11.
When air containing dust in a power plant enters the dust collecting cavity 3 through the air inlet pipe 4, the water pump 13 is started to work, water in the liquid collecting tank 11 is filtered by the filter 12, is pumped into the water supply pipe 7 by the water pump 13 and is sprayed on the filter screen 5 through the sprayer 6, the dust removal operation is carried out on the smoke flowing from bottom to top in the filter screen 5, and the sewage after dust removal is collected in the dust collecting cavity 3 and flows into the liquid collecting tank 11 along the return pipe 10;
further, in the invention, the bottom of the liquid collecting tank 11 is connected with a sewage discharge pipe 14, a sewage discharge valve 15 is arranged on the sewage discharge pipe 14, and sewage in the liquid collecting tank 11 can be discharged through the sewage discharge pipe 14 by opening the sewage discharge valve 15;
furthermore, a demisting net 8 is arranged above the filter screen 5 and used for removing water mist sprayed by the sprayer 6, so that the content of the water mist in the flue gas passing through the demisting net 8 is reduced;
an annular inner baffle 9 is arranged above the inner cylinder body 2, the bottom of the annular inner baffle 9 is connected with the inner wall of the flue gas dust removal cylinder 1, a shunting cover 16 is arranged at the bottom of the annular inner baffle 9, a plurality of air inlets 17 are arranged on the shunting cover 16, the air inlets 17 are communicated with the top of the dust collection cavity 3, so that air for removing dust in the dust collection cavity 3 can conveniently enter a cylinder enclosed by the annular inner baffle 9 along the air inlets 17, a plurality of cooling pipes 18 are arranged in the annular inner baffle 9, a plurality of heat exchange fins 23 are arranged on the cooling pipes 18, the bottoms of the cooling pipes 18 are communicated with a liquid inlet pipe disc 19, the liquid inlet pipe disc 19 is communicated with a refrigerant input pipe 20, the tops of the cooling pipes 18 are communicated with a liquid outlet pipe disc 21, the liquid outlet pipe disc 21 is communicated with a refrigerant output pipe 22, when smoke gas flows through a cylinder enclosed by the annular inner baffle 9, the cooling pipes 18 inside the flue gas further exchange heat with the flue gas, so that the waste heat in the flue gas is fully utilized.
Baffle 9 upper end internally mounted has ceramic filtration membrane filter 24 in the annular for impurity to in the flue gas further filters, and draught fan 25 is installed at baffle 9 top in the annular, and draught fan 25 is preferred to be axial fan, is used for the increase to the suction capacity of baffle 9 interior air in the annular, does benefit to the discharge of flue gas, establish to gas collecting cavity 26 at flue gas dust removal barrel 1 top, the intussuseption of flue gas dust removal barrel 1 in the baffle 9 outside in the annular is filled with a plurality of fibre balls 27, and the parcel has activated carbon layer 28 in the fibre balls 27, be connected with blast pipe 29 on the flue gas dust removal barrel 1 lateral wall, blast pipe 29 and the inside intercommunication of flue gas dust removal barrel 1 in the baffle 9 outside in the annular, conveniently discharge the flue gas.
Example 2
Referring to fig. 4 to 5, an environment-friendly flue gas dust removal and purification device for a power plant comprises a flue gas dust removal cylinder 1, an inner cylinder 2, an annular inner baffle 9 and a cooling pipe 18, wherein the inner cylinder 2 is installed inside the flue gas dust removal cylinder 1, the bottom of the inner cylinder 2 is connected with the bottom of the flue gas dust removal cylinder 1, an ash collection cavity 3 is arranged between the flue gas dust removal cylinder 1 and the inner cylinder 2, an air inlet pipe 4 is connected to the outer wall of the flue gas dust removal cylinder 1, the air inlet pipe 4 is communicated with the ash collection cavity 3, a filter screen 5 is installed in the ash collection cavity 3 above the air inlet pipe 4, a sprayer 6 is arranged at the top of the filter screen 5, the sprayer 6 is communicated with a water supply pipe 7, the water supply pipe 7 is arranged in a cavity in the inner cylinder 2, the water supply pipe 7 is connected with a water outlet of a water pump 13, a water inlet of the water pump 13 is connected with the filter 12 through a pipeline, and the filter 12 is arranged in a liquid collection pool 11; the liquid collecting pool 11 is arranged at the bottom of the flue gas dust removal cylinder 1, the bottom of the ash collecting cavity 3 is communicated with the liquid collecting pool 11 through a return pipe 10, as shown in fig. 5, and the arrow in the figure indicates the water flow direction;
further, in the present invention, the top nozzle of the return pipe 10 is disposed below the liquid level in the liquid collecting tank 11, and the filter 12 is also disposed below the liquid level in the liquid collecting tank 11, so as to conveniently filter the liquid in the liquid collecting tank 11.
When air containing dust in a power plant enters the dust collecting cavity 3 through the air inlet pipe 4, the water pump 13 is started to work, water in the liquid collecting tank 11 is filtered by the filter 12, is pumped into the water supply pipe 7 by the water pump 13 and is sprayed on the filter screen 5 through the sprayer 6, the dust removal operation is carried out on the smoke flowing from bottom to top in the filter screen 5, and the sewage after dust removal is collected in the dust collecting cavity 3 and flows into the liquid collecting tank 11 along the return pipe 10;
further, in the invention, the bottom of the liquid collecting tank 11 is connected with a sewage discharge pipe 14, a sewage discharge valve 15 is arranged on the sewage discharge pipe 14, and sewage in the liquid collecting tank 11 can be discharged through the sewage discharge pipe 14 by opening the sewage discharge valve 15;
different from the embodiment 1, in the embodiment of the present invention, the pipe orifice of the air inlet pipe 4 may also be disposed at the bottom of the ash collecting cavity 3, and when the atomizer 6 sprays, the water flow is collected at the bottom of the ash collecting cavity 3 and submerges the pipe orifice of the air inlet pipe 4, so as to facilitate dust removal treatment of the flue gas output from the pipe orifice of the air inlet pipe 4 in advance;
in the invention, the liquid collecting tank 11 is also internally provided with the heat exchange coil for recycling the redundant flue gas waste heat in the liquid collecting tank 11, and the heat exchange coil can directly exchange heat for the flue gas waste heat in the liquid collecting tank 11, thereby improving the heat utilization efficiency.
The rest of the structure of the embodiment of the present invention is the same as that of embodiment 1.
The technical principle of the present invention has been described above with reference to specific embodiments, which are merely preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. Other embodiments of the invention will occur to those skilled in the art without the exercise of inventive faculty, and such will fall within the scope of the invention.

Claims (7)

1. An environment-friendly power plant flue gas dedusting and purifying device comprises a flue gas dedusting cylinder (1), an inner cylinder body (2), an annular inner baffle plate (9) and a cooling pipe (18), wherein the inner cylinder body (2) is arranged inside the flue gas dedusting cylinder (1), the bottom of the inner cylinder body (2) is connected with the bottom of the flue gas dedusting cylinder (1), an ash collecting cavity (3) is arranged between the flue gas dedusting cylinder (1) and the inner cylinder body (2), the outer wall of the flue gas dedusting cylinder (1) is connected with an air inlet pipe (4), the air inlet pipe (4) is communicated with the ash collecting cavity (3), the environment-friendly power plant flue gas dedusting and purifying device is characterized in that a filter screen (5) is arranged in the ash collecting cavity (3) above the air inlet pipe (4), the top of the filter screen (5) is provided with a sprayer (6), the sprayer (6) is communicated with a water supply pipe (7), the water supply pipe (7) is arranged in a cavity in the inner cylinder body (2), and the water supply pipe (7) is connected with a water outlet of a water pump (13), a water inlet of the water pump (13) is connected with a filter (12) through a pipeline, and the filter (12) is arranged in the liquid collecting tank (11); the liquid collecting pool (11) is arranged at the bottom of the flue gas dust removal cylinder (1), and the bottom of the ash collecting cavity (3) is communicated with the liquid collecting pool (11) through a return pipe (10); an annular inner baffle (9) is arranged above the inner cylinder body (2), the bottom of the annular inner baffle (9) is connected with the inner wall of the flue gas dust removal cylinder (1), a shunting cover (16) is arranged at the bottom of the annular inner baffle (9), and a plurality of air inlets (17) are formed in the shunting cover (16);
install a plurality of cooling tubes (18) in baffle (9) in the annular, baffle (9) upper end internally mounted has ceramic filtration membrane filter (24) in the annular, and draught fan (25) are installed at baffle (9) top in the annular, and the flue gas dust removal section of thick bamboo (1) intussuseption in baffle (9) outside in the annular is filled with a plurality of fibre balls (27), and the parcel has activated carbon layer (28) in fibre ball (27), be connected with blast pipe (29) on flue gas dust removal section of thick bamboo (1) lateral wall, inside intercommunication in flue gas dust removal section of thick bamboo (1) in blast pipe (29) and annular inner baffle (9) outside.
2. An environmentally friendly power plant flue gas dedusting and cleaning apparatus as defined in claim 1, wherein the top nozzle of the return pipe (10) is disposed below the liquid level in the liquid collecting tank (11), and the filter (12) is also disposed below the liquid level in the liquid collecting tank (11).
3. The environment-friendly power plant flue gas dedusting and purifying device according to claim 2, wherein a drain pipe (14) is connected to the bottom of the liquid collecting tank (11), and a drain valve (15) is installed on the drain pipe (14).
4. An environment-friendly power plant flue gas dedusting and cleaning device as defined in any one of claims 1-3, wherein a demisting screen (8) is arranged above the filter screen (5).
5. The environmental protection type flue gas dust removal and purification device for the power plant according to claim 4, wherein the air inlet (17) is communicated with the top of the ash collection cavity (3), the bottom of the cooling pipe (18) is communicated with the liquid inlet pipe disc (19), the liquid inlet pipe disc (19) is communicated with the refrigerant input pipe (20), the top of the cooling pipe (18) is communicated with the liquid outlet pipe disc (21), and the liquid outlet pipe disc (21) is communicated with the refrigerant output pipe (22).
6. An environment-friendly power plant flue gas dedusting and cleaning device according to claim 1, characterized in that the mouth of the inlet pipe (4) is arranged at the bottom of the dust collecting cavity (3).
7. The environment-friendly power plant flue gas dedusting and purifying device according to claim 3, wherein a heat exchange coil is further arranged in the liquid collecting tank (11).
CN201910571826.6A 2019-06-28 2019-06-28 Environmental-friendly power plant flue gas dust removal and purification device Active CN110201477B (en)

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CN110201477B true CN110201477B (en) 2021-08-03

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