CN101569814A - Combined three-stage efficient desulfurization dust-removal system and method thereof - Google Patents
Combined three-stage efficient desulfurization dust-removal system and method thereof Download PDFInfo
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- CN101569814A CN101569814A CNA2009100850128A CN200910085012A CN101569814A CN 101569814 A CN101569814 A CN 101569814A CN A2009100850128 A CNA2009100850128 A CN A2009100850128A CN 200910085012 A CN200910085012 A CN 200910085012A CN 101569814 A CN101569814 A CN 101569814A
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Abstract
The invention provides a combined three-stage efficient desulfurization dust-removal system and a method thereof. The system comprises a dry dust remover internally provided with a turboseparator, a desulfurization purification tower and a centrifugal hydroextractor which are arranged between a flue gas generating device and a chimney in sequence and are communicated by an connecting channel, wherein a venturi is arranged at the front of the tangential inlet of the desulfurization purification tower, and a draught fan is arranged between the centrifugal hydroextractor and the chimney. In the method, firstly about 90% dust particles are removed in the dry dust remover by dry dust removal, then wet desulphurization dust removal is carried out in the venturi and the desulfurization purification tower for many times, and finally dehydration, dehumidify and discharge are carried out in the centrifugal hydroextractor. The wear of flue gas on the device is reduced with high dust removal efficiency and the invention enjoys good desulfurization effect, stable property, long service life and easy operation, thus thoroughly overcoming the disadvantages of easy corrosive wear of other desulfurization dust-removal devices.
Description
Technical field
The present invention relates to the desulfurization and dedusting technology field, particularly relate to a kind of combined three-stage efficient desulfurization dust-removal system and method.
Background technology
The flue gas that the Industrial Boiler fire coal is produced is because of the sulfur-bearing dust-laden; if directly be discharged to meeting serious environment pollution in the Nature; so need carry out desulfurization and dedusting; existing desulfurating dust-removing equipment adopts the integral type desulfurating dust-removing equipment more; this desulfurating dust-removing equipment carries out desulfurization and dedusting in same container; blast and flow velocity are low excessively when air-introduced machine startup and shutdown occurring causes equipment often to stop up; produce air-introduced machine band water simultaneously; cause problems such as desulfurization and dedusting unstable properties to cause the desulfurization and dedusting effect undesirable under the air-introduced machine frequency conversion situation; and equipment and materials adopts steel more, makes air-introduced machine and cigarette air channel cause corrosion to cause service life short easily.
Summary of the invention
Problems such as the desulfurization and dedusting effect is low and unstable in order to solve in the present invention, service life is short provide a kind of combined three-stage efficient desulfurization dust-removal system, and dust-removal and desulfurizing is effective, stable performance, long service life, simple to operate.
The present invention also provides the combined three-stage efficient desulfurization dust collection method.
Technical scheme of the present invention is as follows:
A kind of combined three-stage efficient desulfurization dust-removal system, it is characterized in that: comprise nonaqueous dust cleaner with dry method dust function, desulfurizing and purifying tower with desulfurizing function, centrifuge dehumidifier with dehydration dehumidification function, the outlet of flue gas generation device is communicated with the tangential entry of described nonaqueous dust cleaner downside, side outlet is communicated with the tangential entry of described desulfurizing and purifying tower downside on the nonaqueous dust cleaner, the outlet of desulfurizing and purifying top of tower is communicated with the top inlet of described centrifuge dehumidifier, the tangential outlet of the downside of centrifuge dehumidifier is communicated with described nonaqueous dust cleaner with chimney, the desulfurizing and purifying tower, be communicated with connecting the air channel between the centrifuge dehumidifier; Several whirlwind are set in the described nonaqueous dust cleaner, and the nonaqueous dust cleaner bottom is provided with the conical hopper of taking in grit from whirlwind bottom, and the conical hopper bottom is provided with dust collecting box; Before the tangential entry of described desulfurizing and purifying tower venturi is set, described venturi is set directly at the tangential entry place of described desulfurizing and purifying tower or is communicated with the tangential entry of desulfurizing and purifying tower by connecting the air channel, and described venturi is communicated with side outlet on the nonaqueous dust cleaner by connecting the air channel; Between described centrifuge dehumidifier and the chimney air-introduced machine is set.
The both sides direction vertical with the venturi tubular axis near the venturi tube wall in the pipe of described venturi is provided with two interior conduits, several alkali lye holes towards the Venturi tube center are set on the interior conduit, described two interior conduits be arranged on the spray upper hose of pipe on the outer wall and communicate.
The centre vertically is provided with two spray equipments in the tower of described desulfurizing and purifying tower, and described spray equipment adopts the spiral nozzle with 150 degree spray angles, and described shower nozzle forms moisture film at the desulfurizing and purifying inner wall of tower; Described desulfurizing and purifying tower bottom is provided with the alkali lye pond, the spillway basin that the downside setting in the connection air channel at described desulfurizing and purifying tower tangential entry place is communicated with the alkali lye pond.
The top of shower nozzle is provided with the first centrifugal dehydration rotary fluid above in described two shower nozzles, between described first centrifugal dehydration rotary fluid and the desulfurizing and purifying inner wall of tower eddy flow plate is set; The top inlet of described centrifuge dehumidifier is provided with the second centrifugal dehydration rotary fluid, and the middle part of described centrifuge dehumidifier is provided with the tank body wind gathering mouth that opens wide up and down, between described wind gathering mouth and the centrifuge dehumidifier inwall eddy flow plate is set.
The stair-stepping joint gangboard that several layers increases progressively step by step from the nonaqueous dust cleaner tangential entry is set in the described nonaqueous dust cleaner, has several that hole of described whirlwind is set on described every layer of joint gangboard; On the described desulfurizing and purifying tower outer wall several visual examination hand-holes are set; Described combined three-stage efficient desulfurization dust-removal system also comprises the solution purification system, described solution purification system respectively with described venturi, described desulfurizing and purifying tower in spray equipment be communicated with by the spray upper hose, described solution purification system is communicated with described spillway basin by overflow pipe, and described solution purification system will purify that the back flow to venturi by the spray upper hose and spray equipment is used for desulfurization from the alkali lye mixture that overflow pipe flow down.
Described nonaqueous dust cleaner casing is the outside high quality carbon steel plate of reinforcing with U-steel, described whirlwind is once cast with excellent cast iron and is formed, described joint gangboard is the high quality carbon steel plate, the interface of inner each parts of described nonaqueous dust cleaner is provided with the waterglass asbestos cord, described waterglass asbestos cord is provided with one deck heat-resistant, wear-resistant protective layer outward again, and described heat-resistant, wear-resistant protective layer is the cast stone sodium silicate mastic; Described desulfurizing and purifying tower cylindrical shell is a spary space flight heat-resistant, wear-resistant anticorrosive paint and beat the cast stone sodium silicate mastic and be in the milk and water the cylindrical shell that light is made behind the high quality carbon steel plate inwall welding bitch; Described centrifuge dehumidifier, connection air channel inwall are provided with the wear-and corrosion-resistant layer; Described wind gathering mouth, centrifugal dehydration rotary fluid, spray equipment, eddy flow plate, visual examination hand-hole, overflow pipe are the high-quality acid-resistant stainless steel.
The combined three-stage efficient desulfurization dust collection method is characterized in that: comprise the dry dedusting technology, wet method sulphur removing and dust removing technology and the dehydration dehumidification process that carry out successively; Described dry dedusting technology comprises that the flue gas that the flue gas generation device is produced introduces nonaqueous dust cleaner under the effect of air-introduced machine, carries out the dry method one-time dedusting and remove grit about 90% in several whirlwind of nonaqueous dust cleaner; The flue gas of described wet method sulphur removing and dust removing technology after with one-time dedusting introduced the desulfurizing and purifying tower and carried out wet method sulphur removing and dust removing by connecting the air channel, and the dehydration dehumidification process is for introducing the gas behind the wet method sulphur removing and dust removing centrifuge dehumidifier dehumidifying back of dewatering and enter in the atmosphere by air-introduced machine to the gas of chimney with cleaning by connecting the air channel.
Flue gas behind described nonaqueous dust cleaner one-time dedusting at first enters by the connection air channel and is arranged in the venturi that is provided with before the desulfurizing and purifying tower tangential entry, be provided with two interior conduits in the described venturi, several alkali lye holes towards the Venturi tube center are set on the interior conduit, described alkali lye hole can form the cascade that sprays to flue gas to spray alkali lye from flue gas two side direction flue gases and cover flue gas fully, described flue gas carries out one time wet method sulphur removing and dust removing during through described cascade, flue gas behind wet method sulphur removing and dust removing enters the desulfurizing and purifying tower, the desulfurizing and purifying tower bottom is the alkali lye pond, the top is provided with the shower nozzle that makes the desulfurizing and purifying inner wall of tower form moisture film, flue gas behind wet method sulphur removing and dust removing produces collision with the alkali lye in desulfurizing and purifying tower bottom alkali lye pond in king-tower carries out rising along inner wall of tower behind the secondary wet process desulfurization and dedusting, when inwall rises and the moisture film of inwall produce hybrid reaction and carry out wet method sulphur removing and dust removing three times, flue gas behind three wet method sulphur removing and dust removings carries out wet method sulphur removing and dust removing four times when continuing to rise the misty rain that alkali lye by the shower nozzle ejection of top forms, and described shower nozzle is the spiral nozzles with 150 degree spray angles.
Described dehydration dehumidification process carries out at twice, be in described desulfurizing and purifying tower for the first time, be in described centrifuge dehumidifier for the second time, shower nozzle top is provided with the first centrifugal dehydration rotary fluid on described desulfurizing and purifying tower top is, the misty rain that forms with the alkali lye of described shower nozzle ejection carries out the first centrifugal dehydration rotary fluid that four flue gases behind the wet method sulphur removing and dust removing continue to rise by the shower nozzle top and carries out the primary dewatering dehumidifying, enter centrifuge dehumidifier by connecting the air channel afterwards, carry out the second dehydration dehumidifying when being arranged on the second centrifugal dehydration rotary fluid of centrifuge dehumidifier top inlet, carry out flue gas after the twice dehydration dehumidifying and be discharged to down side outlet and cause chimney along the wind gathering mouth of centrifuge dehumidifier inwall by centrifuge dehumidifier the gas of cleaning is entered in the atmosphere by air-introduced machine.
The dust that drops at whirlwind when described nonaqueous dust cleaner carries out dedusting is fallen in the dust collecting box by the conical hopper that the nonaqueous dust cleaner bottom is provided with; Fine solid particle when described desulfurizing and purifying tower carries out wet method sulphur removing and dust removing in the flue gas and current are discharged to the spillway basin that is communicated with the alkali lye pond after falling jointly and being back to the alkali lye pond, be discharged to the solution purification system from spillway basin by overflow pipe, upper hose flows to described venturi and shower nozzle is used for wet method sulphur removing and dust removing through spraying behind the solution purification system purification.
Technique effect of the present invention is:
The present invention adopts the separate assembling system to carry out tertiary treatment, earlier with the nonaqueous dust cleaner of desulphurization plant split in carry out dry method dust, remove and in desulphurization plant, carry out wet desulphurization behind the grit about 90% and dehydration dehumidifying back is exclusive, the wearing and tearing of flue dust have been reduced to desulphurization plant, overcome in the past the integral type desulfurating dust-removing equipment because air-introduced machine starts and blast and flow velocity is low excessively produces air-introduced machine band water when causing equipment often to stop up and cause air-introduced machine and air channel to cause phenomenons such as corrosion when shutting down, can not cause equipment to stop up, even adopt the air inducing converting operation, also can not influence the dust-removal and desulfurizing effect; Carry out dedusting during desulfurization once more and improve efficiency of dust collection, the venturi that is arranged on the desulfurizing and purifying tower tangential entry improves desulfurized effect; Carry out the desulfurization and dedusting stable performance with system of the present invention, long service life, simple to operate, only need once debugging after the installation, need not to adjust any position during operation, and can non-maintainingly maintain.
Two interior conduit alkali lye holes of venturi can form the cascade that sprays to flue gas to spray alkali lye from flue gas two side direction flue gases and cover flue gas fully, carry out one time wet method sulphur removing and dust removing during flue gas process cascade, carry out once desulfurization during flue gas process cascade and can guarantee that flue gas contacts with the close of alkali lye, and hybrid reaction is carried out once more with the alkali lye that alkali lye pond, moisture film, spray equipment spray in the back in entering tower, dehumidify at built-in and external dehydration dehydrating unit after the desulfurization, repeatedly desulfurization and dedusting and dehumidifying can improve the desulfurization and dedusting effect.Spray equipment adopts the big spiral nozzle of spray angle that the flue gas of rising is fully washed, and improves the desulfurization and dedusting effect.
Equipment all adopts the high-quality corrosion-proof wear-resistant material and increases airtight wearing layer, from solved the shortcoming of the perishable wearing and tearing of other desulfurization and dedusting at all, any place of leaking out can not appear yet, when operation, prolonged its service life, in servicely do not need any maintenance cost in the normal phase, can reach more than 10 years its service life.
Flue gas after this method is handled can guarantee to reach the local discharge standard in the strictest DB11/139-2007 Beijing, the whole nation.That is: sulfur dioxide is less than 50mg/m3, and flue dust is less than 30mg/m3.Smoke dust discharge concentration is less than 30mg/m3, and sulfur dioxide emissioning concentration is less than 50mg/m3, and discharged nitrous oxides concentration is less than below the 200mh/m3, and lingemann blackness is less than 1 grade.
Description of drawings
Fig. 1 is the structural representation of combined three-stage efficient desulfurization dust-removal system of the present invention.
Reference numeral lists as follows:
The 1-boiler, the 2-nonaqueous dust cleaner, 3-desulfurizing and purifying tower, the 4-centrifuge dehumidifier, the 5-air-introduced machine, the 6-chimney, 7-connects the air channel, 8-conical hopper, 9-solution purification system, 10-venturi, 11-shower nozzle, 12-spillway basin.
The specific embodiment
Below in conjunction with accompanying drawing one of embodiments of the invention are described further.Fig. 1 is the structural representation of combined three-stage efficient desulfurization dust-removal system of the present invention.
As shown in Figure 1, combined three-stage efficient desulfurization dust-removal system of the present invention comprises nonaqueous dust cleaner 2, desulfurizing and purifying tower 3, centrifuge dehumidifier 4, solution purification system 9, sets gradually nonaqueous dust cleaner 2, desulfurizing and purifying tower 3, centrifuge dehumidifier 4 between boiler 1 and chimney 6.
The downside position of leaning on of nonaqueous dust cleaner 2 sides is provided with tangential entry, this tangential entry connects with being connected air channel 7 with the outlet of boiler 1, the stair-stepping joint gangboard that has several layers to increase progressively step by step in the nonaqueous dust cleaner 2 from the nonaqueous dust cleaner tangential entry, there are several that hole of whirlwind is set on every layer of joint gangboard, each whirlwind is arranged on the hole, the air inlet of each whirlwind is facing to nonaqueous dust cleaner 2 tangential entries, nonaqueous dust cleaner 2 downsides have conical hopper 8, conical hopper 8 can be taken in the dust that the multicyclone of comforming falls down, and conical hopper 8 bottoms are provided with dust collecting box.
Nonaqueous dust cleaner 2 outer case and inner joint gangboard all adopt the high quality carbon steel plate to make, for preventing to weld modification and convenient transportation and lifting, whole device external all reinforced with U-steel, inner whirlwind adopts excellent cast iron once to cast and forms, carry out the strictness check when going into factory one by one, whole interfaces adopt the waterglass asbestos cords airtight during inner the assembling.Add the cast stone sodium silicate mastic as the heat-resistant, wear-resistant protective layer with outside, the airtight back of waterglass asbestos cord; preventing that the asbestos cord sealing wear from leaking out influences dust removing effects and service life; making this service life of equipment of processing with the method can reach more than 10 years; after the whole welding assemblies of equipment are finished; polishing eliminates rust in the outside; then primer spray twice, enamel paint finish paint twice, and so far complete equipment completes.
The downside position of leaning on of desulfurizing and purifying tower 3 sides is provided with tangential entry, venturi 10 is set before this tangential entry, venturi 10 can be set directly at the tangential entry place of desulfurizing and purifying tower 3 or can be communicated with the tangential entry of desulfurizing and purifying tower by connecting air channel 7, and venturi 10 is communicated with being connected air channel 7 with the last side outlet of nonaqueous dust cleaner 2.The both sides direction vertical with venturi 10 tubular axis near venturi 10 tube walls in the pipe of venturi 10 is provided with two interior conduits, several alkali lye holes towards venturi 10 tube hubs are set on the interior conduit, two interior conduits communicate with spray upper hose on being arranged on the pipe outer wall, these two interior conduits can form threeway with the spray upper hose (pipe) on the pipe outer wall, two interior conduits also can pass behind the venturi tube wall or two pipelines are two spray upper hoses, the spray upper hose is communicated with solution purification system 9, two interior conduit alkali lye holes can form the cascade that sprays to flue gas to spray alkali lye from flue gas two side direction flue gases and cover flue gas fully, like this flue gas during by venturi alkali lye can fully contact with flue gas and carry out wet method sulphur removing and dust removing.The centre vertically is provided with two spray equipments that are connected with solution purification system 9 in the tower of desulfurizing and purifying tower 3, spray equipment adopts the spiral nozzle 11 with 150 degree spray angles, the alkali lye of shower nozzle 11 ejections forms the alkali lye pond in desulfurizing and purifying tower 3 bottoms, and at desulfurizing and purifying tower 3 inwalls formation moisture film, the alkali lye pond is communicated with spillway basin 12, spillway basin 12 can be arranged on the downside in the connection air channel 7 at desulfurizing and purifying tower 3 tangential entry places, and spillway basin 12 is connected with solution purification system 9 by overflow pipe.In two shower nozzles 11 by upper nozzle top the first centrifugal dehydration rotary fluid is set, between the first centrifugal dehydration rotary fluid and desulfurizing and purifying tower 3 inwalls eddy flow plate is set, eddy flow plate and the angled inclination of desulfurizing and purifying tower 3 inwalls, the eddy flow plate that is in eminence is provided with the rinse mouth that links to each other with running water pipe with the junction of inwall, and the eddy flow plate that is in lower is provided with the overflow pipe that is connected with solution purification system 9 with the junction of inwall.Several visual examination hand-holes are set on the desulfurizing and purifying tower 3, utilize visual examination hand-hole inspection debugging during the whole system operation, need not to adjust any position, and can non-maintainingly maintain.
Desulfurizing and purifying tower 3 top exits connect with being connected air channel 7 with the top inlet of centrifuge dehumidifier 4, the top inlet of centrifuge dehumidifier 4 is provided with the second centrifugal dehydration rotary fluid, the middle part of centrifuge dehumidifier 4 is provided with the tank body wind gathering mouth that opens wide up and down, between wind gathering mouth and the centrifuge dehumidifier inwall eddy flow plate is set; The inclination that the inwall of eddy flow plate and centrifuge dehumidifier is angled, the eddy flow plate that is in eminence is provided with the rinse mouth that links to each other with running water pipe with the junction of inwall, and the eddy flow plate that is in lower is provided with the overflow pipe that is connected with alkali liquor circulating system 9 with the junction of inwall; The inner bottom surface of centrifuge dehumidifier 4 is skewed, and the downside that a side that is in eminence is provided with centrifuge dehumidifier 4 tangentially exports, and is in the overflow pipe that a side setting of lower is connected with alkali liquor circulating system 9.The tangential outlet of the downside of centrifuge dehumidifier 4 is connected with chimney 6, between centrifuge dehumidifier 4 and the chimney 6 air-introduced machine 5 is set.
The outer cylinder body of desulfurizing and purifying tower 3 and centrifuge dehumidifier 4 all adopts the high quality carbon steel plate to make; inner wind gathering mouth; the centrifugal dehydration rotary fluid; spray equipment and visual examination manhole; the base of spray upper hose and overflow pipe all adopts the high-quality acid-resistant stainless steel to make; after treating that the main body welding is finished; cylinder inboard wall welding bitch; after welding, bitch carries out inside polishing rust cleaning; the heat-resistant, wear-resistant of the whole spary space flight of inwall then anticorrosive paint; spraying process has the special messenger to check, holiday position a little, treat the anticorrosive paint air dry after; inner body is beaten the cast stone sodium silicate mastic; clay solidifies back inwall grouting and waters light, and it is solid and reliable that the method is made the wear-and corrosion-resistant performance, even if the cast stone clay cracks space flight coating protection in addition; acid solution is corroded the tower body steel plate never; after treating all to finish, outside polishing rust cleaning, twice of primer spray; twice of enamel paint finish paint; after treating the finish paint drying, whole equipment making finished, and can dispatch from the factory.
Return the venturi 10 of desulfurizing and purifying tower 3 again behind the fluid purification that solution purification system 9 will flow down from the overflow pipe of desulfurizing and purifying tower 3 and centrifuge dehumidifier 4 and the spray upper hose of two spray equipments is used for wet method sulphur removing and dust removing.
Adopt the three-stage efficient desulfurization dust collection method of combinations thereof three-stage efficient desulfurization dust-removal system, comprise dry dedusting technology, wet method sulphur removing and dust removing technology and dehydration dehumidification process.The ash-laden gas that boiler 1 fire coal is produced is under the effect of air-introduced machine 5, at first enter nonaqueous dust cleaner 2 by connecting air channel 7, whirlwind in nonaqueous dust cleaner 2 carries out dry method dust, about 90% grit can be removed, the dust that falls down from whirlwind behind the dry method dust is fallen conical hopper 8 and is collected in the dust collecting box.Gone out the back by the side outlet from the nonaqueous dust cleaner 2 of the flue gas behind dry method dust and begin to carry out wet method sulphur removing and dust removing after air channel 7 enters venturi by connecting, sulfur-containing smoke gas is after entering venturi 10 under the gravitation of air-introduced machine 5, when passing in the cascade that the alkali lye of two interior conduit alkali lye holes ejection forms, carry out wet method sulphur removing and dust removing one time with the reaction of alkali lye mixed once, enter in desulfurizing and purifying tower 3 king-towers along venturi 10 downside inwalls after passing cascade, enter the back and collide the formation spray with the alkali lye pond generation of desulfurizing and purifying tower 3 bottoms, water smoke, carry out the secondary wet process desulfurization and dedusting, the dust that drops flows into spillway basin 12 with alkali lye and is discharged to alkali liquor circulating system 9 along overflow pipe, flue gas continues to rise along the king-tower inwall, with the moisture film of inner wall of tower in inferior abundant hybrid reaction, carry out wet method sulphur removing and dust removing three times, spillway basin 12 is discharged at the bottom of being reverse back to tower under fine solid particle in the while flue gas and current are common, the alkali lye that flue gas is sprayed by spiral nozzle 11 when rising once more fully washs and carries out wet method sulphur removing and dust removing four times, sulfur in smoke is fully reacted with alkaline absorption solution through twice washing meeting, basically can all be removed, the centrifugal dehydration rotary fluid that flue gas continuation rising after processed enters in the tower carries out the primary dewatering dehumidifying, entering tower internal upper part dewatering box then continues to rise, enter centrifuge dehumidifier 4 by connecting air channel 7, carry out the second dehydration dehumidifying during through the centrifugal dehydration rotary fluid of centrifuge dehumidifier 4 imports, flue gas after the dehydration dehumidifying enters in the atmosphere by air-introduced machine to the gas of chimney 6 with cleaning at last through wind gathering mouth, more than is the principle process of the inventive method.
Flue gas after this method is handled can guarantee to reach the local discharge standard in the strictest DB11/139-2007 Beijing, the whole nation.That is: sulfur dioxide is less than 50mg/m3, and flue dust is less than 30mg/m3.Smoke dust discharge concentration is less than 30mg/m3, and sulfur dioxide emissioning concentration is less than 50mg/m3, and discharged nitrous oxides concentration is less than below the 200mh/m3, and lingemann blackness is less than 1 grade.
Claims (10)
1. combined three-stage efficient desulfurization dust-removal system, it is characterized in that: comprise nonaqueous dust cleaner with dry method dust function, desulfurizing and purifying tower with desulfurizing function, centrifuge dehumidifier with dehydration dehumidification function, the outlet of flue gas generation device is communicated with the tangential entry of described nonaqueous dust cleaner downside, side outlet is communicated with the tangential entry of described desulfurizing and purifying tower downside on the nonaqueous dust cleaner, the outlet of desulfurizing and purifying top of tower is communicated with the top inlet of described centrifuge dehumidifier, the tangential outlet of the downside of centrifuge dehumidifier is communicated with described nonaqueous dust cleaner with chimney, the desulfurizing and purifying tower, be communicated with connecting the air channel between the centrifuge dehumidifier; Several whirlwind are set in the described nonaqueous dust cleaner, and the nonaqueous dust cleaner bottom is provided with the conical hopper of taking in grit from whirlwind bottom, and the conical hopper bottom is provided with dust collecting box; Before the tangential entry of described desulfurizing and purifying tower venturi is set, described venturi is set directly at the tangential entry place of described desulfurizing and purifying tower or is communicated with the tangential entry of desulfurizing and purifying tower by connecting the air channel, and described venturi is communicated with side outlet on the nonaqueous dust cleaner by connecting the air channel; Between described centrifuge dehumidifier and the chimney air-introduced machine is set.
2. combined three-stage efficient desulfurization dust-removal system according to claim 1, it is characterized in that: the both sides direction vertical with the venturi tubular axis near the venturi tube wall in the pipe of described venturi is provided with two interior conduits, several alkali lye holes towards the Venturi tube center are set on the interior conduit, described two interior conduits be arranged on the spray upper hose of pipe on the outer wall and communicate.
3. combined three-stage efficient desulfurization dust-removal system according to claim 1 and 2, it is characterized in that: the centre vertically is provided with two spray equipments in the tower of described desulfurizing and purifying tower, described spray equipment adopts the spiral nozzle with 150 degree spray angles, and described shower nozzle forms moisture film at the desulfurizing and purifying inner wall of tower; Described desulfurizing and purifying tower bottom is provided with the alkali lye pond, the spillway basin that the downside setting in the connection air channel at described desulfurizing and purifying tower tangential entry place is communicated with the alkali lye pond.
4. combined three-stage efficient desulfurization dust-removal system according to claim 3, it is characterized in that: the top of shower nozzle is provided with the first centrifugal dehydration rotary fluid above in described two shower nozzles, between described first centrifugal dehydration rotary fluid and the desulfurizing and purifying inner wall of tower eddy flow plate is set; The top inlet of described centrifuge dehumidifier is provided with the second centrifugal dehydration rotary fluid, and the middle part of described centrifuge dehumidifier is provided with the tank body wind gathering mouth that opens wide up and down, between described wind gathering mouth and the centrifuge dehumidifier inwall eddy flow plate is set.
5. according to the described combined three-stage efficient desulfurization dust-removal system of one of claim 1 to 4, it is characterized in that: the stair-stepping joint gangboard that several layers increases progressively step by step from the nonaqueous dust cleaner tangential entry is set in the described nonaqueous dust cleaner, has several that hole of described whirlwind is set on described every layer of joint gangboard; On the described desulfurizing and purifying tower outer wall several visual examination hand-holes are set; Described combined three-stage efficient desulfurization dust-removal system also comprises the solution purification system, described solution purification system respectively with described venturi, described desulfurizing and purifying tower in spray equipment be communicated with by the spray upper hose, described solution purification system is communicated with described spillway basin by overflow pipe, and described solution purification system will purify that the back flow to venturi by the spray upper hose and spray equipment is used for desulfurization from the alkali lye mixture that overflow pipe flow down.
6. according to the described combined three-stage efficient desulfurization dust-removal system of one of claim 1 to 5, it is characterized in that: described nonaqueous dust cleaner casing is the outside high quality carbon steel plate of reinforcing with U-steel, described whirlwind is once cast with excellent cast iron and is formed, described joint gangboard is the high quality carbon steel plate, the interface of inner each parts of described nonaqueous dust cleaner is provided with the waterglass asbestos cord, described waterglass asbestos cord is provided with one deck heat-resistant, wear-resistant protective layer outward again, and described heat-resistant, wear-resistant protective layer is the cast stone sodium silicate mastic; Described desulfurizing and purifying tower cylindrical shell is a spary space flight heat-resistant, wear-resistant anticorrosive paint and beat the cast stone sodium silicate mastic and be in the milk and water the cylindrical shell that light is made behind the high quality carbon steel plate inwall welding bitch; Described centrifuge dehumidifier, connection air channel inwall are provided with the wear-and corrosion-resistant layer; Described wind gathering mouth, centrifugal dehydration rotary fluid, spray equipment, eddy flow plate, visual examination hand-hole, overflow pipe are the high-quality acid-resistant stainless steel.
7. use the combined three-stage efficient desulfurization dust collection method of combined three-stage efficient desulfurization dust-removal system according to claim 1, it is characterized in that: comprise the dry dedusting technology, wet method sulphur removing and dust removing technology and the dehydration dehumidification process that carry out successively; Described dry dedusting technology comprises that the flue gas that the flue gas generation device is produced introduces nonaqueous dust cleaner under the effect of air-introduced machine, carries out dry method dust and remove grit about 90% in several whirlwind of nonaqueous dust cleaner; The flue gas of described wet method sulphur removing and dust removing technology after with one-time dedusting introduced the desulfurizing and purifying tower and carried out wet method sulphur removing and dust removing by connecting the air channel, and the dehydration dehumidification process is for introducing the gas behind the wet method sulphur removing and dust removing centrifuge dehumidifier dehumidifying back of dewatering and enter in the atmosphere by air-introduced machine to the gas of chimney with cleaning by connecting the air channel.
8. combined three-stage efficient desulfurization dust collection method according to claim 7, it is characterized in that: the flue gas behind described nonaqueous dust cleaner one-time dedusting at first enters by the connection air channel and is arranged in the venturi that is provided with before the desulfurizing and purifying tower tangential entry, be provided with two interior conduits in the described venturi, several alkali lye holes towards the Venturi tube center are set on the interior conduit, described alkali lye hole can form the cascade that sprays to flue gas to spray alkali lye from flue gas two side direction flue gases and cover flue gas fully, described flue gas carries out one time wet method sulphur removing and dust removing during through described cascade, flue gas behind wet method sulphur removing and dust removing enters the desulfurizing and purifying tower, the desulfurizing and purifying tower bottom is the alkali lye pond, the top is provided with the shower nozzle that makes the desulfurizing and purifying inner wall of tower form moisture film, flue gas behind wet method sulphur removing and dust removing produces collision with the alkali lye in desulfurizing and purifying tower bottom alkali lye pond in king-tower carries out rising along inner wall of tower behind the secondary wet process desulfurization and dedusting, when inwall rises and the moisture film of inwall produce hybrid reaction and carry out wet method sulphur removing and dust removing three times, flue gas behind three wet method sulphur removing and dust removings carries out wet method sulphur removing and dust removing four times when continuing to rise the misty rain that alkali lye by the shower nozzle ejection of top forms, and described shower nozzle is the spiral nozzles with 150 degree spray angles.
9. combined three-stage efficient desulfurization dust collection method according to claim 8, it is characterized in that: described dehydration dehumidification process carries out at twice, be in described desulfurizing and purifying tower for the first time, be in described centrifuge dehumidifier for the second time, shower nozzle top is provided with the first centrifugal dehydration rotary fluid on described desulfurizing and purifying tower top is, the misty rain that forms with the alkali lye of described shower nozzle ejection carries out the first centrifugal dehydration rotary fluid that four flue gases behind the wet method sulphur removing and dust removing continue to rise by the shower nozzle top and carries out the primary dewatering dehumidifying, enter centrifuge dehumidifier by connecting the air channel afterwards, carry out the second dehydration dehumidifying when being arranged on the second centrifugal dehydration rotary fluid of centrifuge dehumidifier top inlet, carry out flue gas after the twice dehydration dehumidifying and be discharged to down side outlet and cause chimney along the wind gathering mouth of centrifuge dehumidifier inwall by centrifuge dehumidifier the gas of cleaning is entered in the atmosphere by air-introduced machine.
10. combined three-stage efficient desulfurization dust collection method according to claim 7 is characterized in that: the dust that drops at whirlwind when described nonaqueous dust cleaner carries out dedusting is fallen in the dust collecting box by the conical hopper that the nonaqueous dust cleaner bottom is provided with; Fine solid particle when described desulfurizing and purifying tower carries out wet method sulphur removing and dust removing in the flue gas and current are discharged to the spillway basin that is communicated with the alkali lye pond after falling jointly and being back to the alkali lye pond, be discharged to the solution purification system from spillway basin by overflow pipe, upper hose flows to described venturi and shower nozzle is used for wet method sulphur removing and dust removing through spraying behind the solution purification system purification.
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