CN105833627B - A kind of wet dust collector, dust removal method and quicklime slaking and dust-extraction unit - Google Patents

Abstract

A water bath dust collector, the dust collector (Q1) includes: a dust removal pool (Q2); a dust collector housing (Q3) located above the dust removal pool (Q2); a dust removal pipeline (Q4), and one end of the dust removal pipeline (Q4) is externally connected The dust removal interface of the lime digester, the other end passes through the dust collector housing (Q3) from top to bottom and extends into the dust removal pool (Q2) below the dust collector housing (Q3), and the dust removal pipe (Q4) extends into the dust removal pool One end of (Q2) is provided with a submerged pipeline nozzle (Q401), wherein the end of the submerged pipeline nozzle (Q401) has a network structure or a porous structure. The invention provides a high-efficiency quicklime digestion water bath dust collector and quicklime digestion dust removal sewage treatment method to solve the problem of poor effect of quicklime digestion and dust removal, and to solve the existing problem of quicklime digestion of a large amount of dust and flue gas environmental pollution, lime digestion and dust removal sewage to environmental pollution The problem, and the problem of how to reuse the dust removal sewage.

Description

A water bath deduster, dedusting method, and quicklime digestion and dedusting device

technical field

The invention relates to the field of quicklime digestion and dust removal in iron and steel sintering plants, in particular to a high-efficiency quicklime digestion water-bath dust collector and quicklime digestion and dust removal sewage treatment method.

Background technique

With the development of modern industry and the improvement of people's quality of life, the requirements for environmental protection are getting higher and higher. Safe production and clean production have become the symbol of modern enterprise civilization.

In the iron and steel metallurgical industry, it is generally necessary to sinter iron ore before entering the blast furnace for ironmaking, and quicklime plays an important role in the sintering process. First, it improves the granulation effect of the mixed material and improves the air permeability of the material layer. Compared with before digestion, the particle size of the mixture > 3mm increases by more than 10%, which can increase the utilization factor of the sintering machine by 3%-5%. Second, the sinter pellets containing Ca(OH) ₂ have a higher Humidity capacity, so it has good thermal stability during the sintering process, can resist the destructive effect of the drying zone, and reduce the influence of the over-humidity layer; thirdly, increase the material temperature; fourthly, reduce the consumption of solid fuel. Studies have shown that due to the increase of material temperature and the improvement of granulation efficiency, the output of sinter can be increased by about 10%, and coke powder can be saved by 1.5kg/t. At present, quicklime has become one of the main fluxes in sintering plants, and the proportion is 3%- 5%.

At present, there are many deficiencies in the digestion and dust removal of quicklime, resulting in high dust concentration in the quicklime digestion zone, serious environmental pollution, and poor dust removal effect. The main problems are:

1. Existing digesters also pollute the environment a lot. At present, single-stage digesters are commonly used in sintering plants. The digestion time is short, the digestibility is low, and the dust generated is too high. The dust concentration in the digestion zone is too high, causing serious environmental pollution.

2. There is no special digestion and dust collector. When quicklime is digested, a large amount of dusty flue gas will be produced. Due to the particularity of the flue gas characteristics, the dust removal effect of ordinary dust collectors cannot meet the national emission concentration standards, and because the lime dust is very cohesive Strong, it is easy to cause blockage of dust removal pipes, fan vibration, etc. The characteristics of quicklime digestion flue gas will not only cause quicklime to adhere to the dust removal pipe, block the pipe after hardening, but also seriously corrode the electrode plate of the electrostatic precipitator, affecting its normal operation. When the bag filter is used, it will also be forced to stop using the bag due to the water hardness that will quickly cause the bag to become clogged. The existence of the above problems seriously affects the normal operation and dust removal efficiency of the dust removal system.

3. At present, wet dedusting is used to remove the dust digested by quicklime, but the dedusting sewage after the existing wet dedusting is discharged randomly, which not only causes secondary pollution to the environment, but also wastes resources.

In the prior art, the waste gas pipe is directly inserted into the water obliquely, the flue gas has a greater impact on the water, and larger air bubbles are formed, so that the dust or particles in the air bubbles do not have sufficient contact with the water, and the effect of cleaning and dust removal is not good.

Contents of the invention

In order to solve the problem of quicklime digestion and dust removal in sintering and further improve the energy saving and emission reduction work in the sintering process, it is necessary to design quicklime digestion and dust collectors to solve the problem of poor effect of quicklime digestion and dust removal, and to solve the existing environmental pollution of quicklime digestion.

The purpose of the present invention is to provide a high-efficiency quicklime digestion water bath dust collector and quicklime digestion dust removal sewage treatment method to solve the problem of poor effect of quicklime digestion and dust removal, and to solve the existing problem of quicklime digestion of a large amount of dust and flue gas environmental pollution, lime digestion and dust removal sewage The problem of environmental pollution, and the problem of how to reuse dust removal sewage.

The characteristics of the flue gas produced by the digestion of quicklime are as follows: 1. Strong cohesiveness and hydrophilicity. According to the test, the breaking strength of CaO is greater than 600Pa. On the inner wall of the dust collector and its pipeline; 2. High dispersion, the chemical reaction between quicklime and water is a violent exothermic reaction, and the particle size of the generated Ca(OH) ₂ colloidal particles is extremely fine, with an average particle size of 30μm. Therefore, During the digestion process, quicklime dust is easy to diffuse with the hot air flow, and the natural settlement is very slow, the diffusion range is wide, and the dust collection is difficult; 3. Hydraulicity, quicklime is digested with water to form Ca(OH) ₂ , which is dispersed in the air It will further absorb water and react with CO ₂ to generate CaCO ₃ precipitates. When the amount of CaCO ₃ accumulates to a certain extent, it will form hard scale and compact, which is the hydraulic hardness of quicklime.

Therefore, aiming at the characteristics of the flue gas produced by quicklime digestion, the present invention provides a high-efficiency quicklime digestion water-bath deduster, which is a wet deduster.

According to a first embodiment of the present invention, a water bath dedusting device (abbreviated as water bath deduster) is provided:

A water bath deduster, the deduster comprising:

Dust removal pool;

The dust collector housing located above the dust removal pool;

Dust removal pipe,

One end of the dust removal pipeline is externally connected to the output end of one or more dust-containing gas collection devices (such as the dust removal interface of the lime digester), and the other end passes through the dust collector shell from top to bottom and extends into the dust collector below the dust collector shell. in the pool. One end of the dust removal pipeline extending into the dust removal pool is provided with a submerged pipeline nozzle. Wherein the end of the nozzle of the submerged pipeline is a mesh structure or a porous structure.

Preferably, the dust removal pipe passes through the middle of the dust collector housing (that is, along the central axis). That is, the dust removal duct is set centrally or approximately centrally within the dust collector housing.

Preferably, the dust remover further includes: an overflow water-sealed pool located at one side of the dust removal pool. Between the dust removal pool and the overflow water seal pool, the water level adjustment hole is opened at the lower end of one side of the dust collector shell.

Preferably, a locking slot and a water level adjusting device are provided outside the dust collector housing next to the water level adjusting hole. The water level regulating device comprises a water level regulating plate, a screw rod and a regulating valve. The water level regulating plate is clamped in the clamping slot. One end of the screw rod is connected with the water level regulating plate, and the other end of the screw rod is connected with the regulating valve. The vertical width of the water level regulating plate is slightly larger than the vertical width of the water level regulating hole. Generally, the vertical width of the water level regulating plate is sufficient to cover the vertical width of the water level regulating hole, and the vertical movement of the regulating plate can be controlled by the regulating valve located outside the water level regulating device (also outside the dust collector housing) to adjust the blocking water level. Adjust hole blocking or sealing area and height.

Preferably, the dust remover further includes: a cover plate arranged above the overflow water-sealed pool. One end of the cover plate is connected to the shell of the dust collector, and the other end is inserted into the overflow water sealing pool.

Preferably, a through hole is opened on the cover plate, and the screw rod passes through the through hole.

Preferably, an overflow pipe is arranged on the upper part of the overflow water-sealed pool. Used to adjust the water level in overflow water seal tanks.

Preferably, an overflow pipe valve is provided on the overflow pipe.

Preferably, a water supply pipe is arranged on the dust removal pool. Used to replenish water in the dedusting pool.

Preferably, the water supply pipe is provided with a water supply pipe valve.

Preferably, the bottom of the dust removal pool is funnel-shaped or "V"-shaped or presents an inverted cone shape (or inverted cone shape). A sewage sludge discharge device is installed at the bottom of the dust removal pool.

Preferably, a water pressure gauge is also provided in the sewage sludge discharge device.

Preferably, a bracket is arranged above the dust removal pool in the dust collector housing. A first set of wire mesh (preferably a V-shaped filter mesh or a V-shaped wire mesh) is arranged below the support as a point for breaking air bubbles. A second set of wire mesh is preferably an inverted V-shaped wire mesh arranged above the support.

Preferably, the first group of wire meshes and/or the second group of wire meshes are staggered and arranged obliquely. A sealing card is arranged at the intersection.

Preferably, a sprinkler head is arranged above the second group of wire meshes. It is used to spray dedusting water or dedusting liquid on the second group of wire mesh.

As a preference, a water retaining and defogging plate is arranged above the sprinkler head. A clean air outlet is provided on the dust collector housing above the water retaining and defogging plate.

Preferably, the dust remover also includes a control system, and the water pressure gauge, the overflow pipe valve and the water supply pipe valve are connected with the control system. The control system controls the water pressure gauge, the overflow pipe valve and the make-up pipe valve.

The water bath deduster described in this application can be installed or arranged on a base, or supported on a load-bearing support. Generally, the shell side of the water bath dust collector is cylindrical or elliptical, that is, the cross section of the shell side of the water bath dust collector is circular or elliptical. It can also be in the shape of a quadrangular prism, that is, the cross section of the shell side of the water bath dust collector is rectangular or square. The height of the main body of the water bath dust collector (that is, the height of the entire shell) is generally 1.2m-10m, preferably 1.5-7m, more preferably 2.0-5m.

According to the second embodiment provided by the present invention, there is provided a method for using a water-bath dust collector or a method of using the above-mentioned water-bath dust collector for dust removal, the method comprising the following steps:

(1) Store water in the dust removal pool through the water supply pipe, adjust the water level adjustment plate, make the water level in the dust removal pool reach the predetermined value, and close the water supply pipe valve;

(2) Dust-containing gas (such as dust and flue gas from the dust removal interface of the quicklime digester) enters the dust collector from top to bottom through the dust removal pipe from the middle of the dust collector shell. According to the nature of the flue gas and the flow rate of the flue gas, Adjust the water level adjustment device so that the dust removal pipe is inserted into a certain position (for example, 0.2-0.8m) in the dust removal pool, and the end of the dust removal pipe inserted into the water is equipped with a submerged pipe nozzle with a mesh structure or a porous structure;

(3) (with a certain speed) the dust-laden gas flows through the dust removal pipe and is sprayed out at the nozzle of the submerged pipe (at a higher speed). After impacting the water layer, it enters the water. Due to the effect of inertia, it continues to move in the original direction, and most of the dust particles adhere to the water and stay in the water. The flue gas hits the water body and is cut into small bubbles by the network structure of the nozzle of the submerged pipeline, which increases the interaction between the flue gas and water. The contact area strengthens the capture of dust by the dedusting water, and realizes the first-level impact water bath dedusting;

(4) After water bath dedusting, most of the dust in the flue gas is removed, and the remaining part of the fine particle dust passes through the first set of wire mesh to form the first water film and the second set of wire mesh to form the second water film. The water membrane captures the fine dust in the flue gas to realize the second-stage filter water membrane dedusting, and the purified gas is discharged from the outlet after being treated by the water retaining and defogging plate.

(5) After a long period of dust removal in the dust removal pool, it has become sewage. The sewage is discharged from the sewage sludge discharge device at the bottom of the funnel-shaped or "V"-shaped dust removal pool, and water is replenished from the water supply pipe.

In the present invention, the nozzle of the submerged pipeline extends into a certain position in the dust removal pool at the bottom of the housing, and the insertion depth is related to the nature of the dust, generally 20-80cm. If the dust density is high and the particles are coarse, the insertion depth is, for example, 20-50cm; if the dust density is small and the particles are fine, the insertion depth is 30-80cm. The contact between air and water improves the dust removal efficiency.

In the present invention, when the dust-containing gas or flue gas is passed through, the water level in the dust removal pool will be raised, and the water that is too high can flow from the water level adjustment hole to the overflow pool arranged outside the adjustment plate, which can make the dust removal pool Keeping the water level at an appropriate height not only allows the smoke to be sucked in smoothly, but also ensures the water-free depth of the nozzle.

In the present invention, a bracket is provided above the dust removal pool in the housing, and a first group of wire mesh is arranged below the bracket. The wire mesh is a set of V-shaped filter screens, which are used to filter the flue gas from the dust removal pool. The bubbles burst and disperse the airflow. An inverted V-shaped second group of wire mesh is arranged above the support. The second group of wire meshes are arranged in a staggered and inclined manner. Sealing cards are arranged at the intersections, and sprinklers are arranged above the wire meshes, which are used to spray dedusting liquid on the wire meshes, forming a downward-flowing water film on the wire meshes, and then flowing to the The air bubbles under the bracket pierce the net to form a second water film to fully capture dust.

In the present invention, the dust collector is equipped with a water level adjustment device, and the water level adjustment function is realized by adjusting the height of the water level adjustment plate. The water level adjustment hole is discharged to the overflow water seal pool to ensure that the submerged pipe nozzle has a stable water depth within a certain range, thereby protecting the fan from burning the motor due to a sudden increase in resistance. When the dust collector is in normal operation, the adjustment valve of the water level adjustment device can be used to control the adjustment plate to move up and down to adjust the water level, and the water depth of the nozzle can be controlled online to ensure the stable and efficient operation of the equipment.

According to a third embodiment of the present invention, quicklime digestion and dedusting equipment is provided, which includes the above-mentioned water-bath deduster and quicklime digester, wherein the water-bath deduster communicates with the dust-collecting outer interface of the quicklime digester through a dust removal pipeline.

Preferably, the quicklime digester is a two-stage quicklime digester or a three-stage quicklime digester. The water-bath dust collector is connected with the dust collection external interface of the digester through a dust removal pipe.

The above-mentioned two-stage quicklime digester includes: a feed inlet, a sealed conveying section box whose front end is connected to the feed inlet, and a first digestion section box connected to the rear end of the sealed conveying section box, which is located at the first The water spray device on the upper or side of the first digestion section box; the sealed dust cover on the top of the first digestion section box, and the upper digestion box unloading at the end of the first digestion section box away from the feed port and the material opening, the second digestion section box located below the first digestion section box, the discharge port at the end of the second digestion section box and close to the feed port; where: in the first digestion section box A pair of first stirring shafts with stirring blades are installed in the body, both of the pair of first stirring shafts are driven by the first driving device and the rotation directions of the two are opposite; in addition, a second digestion section box is equipped with a A pair of second agitating shafts with stirring blades, both of the pair of second agitating shafts are driven by the second driving device and the rotation directions of the two are opposite; and, the sealed dust removal cover has an external dust collection interface.

The three-stage quicklime digester described above includes: a feed inlet, a sealed conveying section box whose front end is connected to the feed inlet, and a first digestion section box connected to the rear end of the sealed conveying section box, which is located at the first The water spray device on the upper or side of the first digestion section box; the sealed dust cover on the top of the first digestion section box, and the upper digestion box unloading at the end of the first digestion section box away from the feed port and the opening of the second digestion section, the second digestion section box located below the first digestion section box, the second digestion section box and the end of the second digestion section near the feed port. (i.e. the outlet), the third digestion section casing located below the second digestion section casing, the discharge opening at the end of the third digestion section casing and away from the feed port; where: in the first digestion section A pair of first agitating shafts with stirring blades are installed in the box, both of the pair of first agitating shafts are driven by the first driving device and the rotation directions of the two are opposite; a pair of agitating shafts are installed in the second digestion section box The second stirring shaft with stirring blades, the pair of second stirring shafts are driven by the second driving device and the rotation directions of the two are opposite; a pair of stirring blades with stirring blades are installed in the third digestion section box The third agitating shaft, the pair of third agitating shafts are driven by the third driving device and the rotation directions of the two are opposite; and, the sealed dust removal cover has an external dust collection interface.

In the above two digesters, preferably, one of the second stirring shafts is located directly below one of the first stirring shafts, and the rotation directions of the two are opposite.

For the three-stage digester, it is preferred that one of the second stirring shafts is located directly below one of the first stirring shafts, and that both of them rotate in opposite directions, and that one of the third stirring shafts is located at the second Directly below one of the two stirring shafts, and the two of them rotate in opposite directions.

Preferably, the input end of the water spray device is externally connected to the initial water supply pipeline, and the output end is connected to a plurality of retractable sprinkler heads located in the upper part of the first digestion section box interior space through an automatic flowmeter water valve; preferably, the automatic flow rate The water metering valve is electrically connected to the master control room so as to automatically control the water volume and has a cut-off function; further preferably, a plurality of retractable sprinkler heads are stretched and adjusted according to the length of the digestion section box, and the lengths are staggered.

In addition, the initial water supply pipe of the sprinkler is connected to the hot water outlet of the external heat exchanger. The heat exchanger has a cold water inlet and a hot water outlet as well as a hot heating gas inlet and a heat exchanged cooling gas outlet. As shown in Figure 3a.

Preferably, the height of the sealed dust-removing hood provided above the box body of the first digestion section gradually increases along the material conveying direction of the box body. Or the pipes of the dust removal system are connected.

Preferably, a digestion box inspection device is also provided on the casing of the two-stage quicklime digester or the three-stage quicklime digester, and the inspection device includes one or more digestion box inspection device doors and one or more digestion box inspection doors. The movable connection mechanism of the device door; preferably, one or more digestive tank maintenance device door movable connection mechanisms are installed at the bottom of the second tank or at the bottom of the second tank and the third tank respectively, The bottom of the door of the digestion box maintenance device is connected with the movable connection mechanism of the door of the digestion box maintenance device, and the door can rotate around the movable connection mechanism. Can be opened and closed.

In this application, a two-stage digester may also be referred to as an upper and lower two-stage digester, and a three-stage digester may also be referred to as an upper and lower three-stage digester.

The length of the two-stage or three-stage digester in this application is generally 3-30m, preferably 4-20m, more preferably 5-10m. Two-stage or three-stage digesters can be mounted on load-bearing supports or on pedestals. The two-stage or three-stage digester in this application can be supported on a stand or mounted on a pedestal. Preferably, a conveyor belt is arranged below the outlet of the two-stage or three-stage digester.

According to another aspect of the present invention, there is provided a quicklime digestion and dedusting method using the above-mentioned digestion and dedusting device comprising a two-stage quicklime digester, the method comprising the following steps:

1) Quicklime digestion: Put quicklime into the feed port of the two-stage quicklime digester, and transport it to the first digestion section box through the sealed conveying section box, and pass through the upper or side of the first digestion section box body. The water spray device sprays water on the quicklime material moving in the first digestion section so that the quicklime is mixed and digested while moving under the stirring action of the stirring shaft, and then enters the second digestion section box again under the stirring action of the stirring shaft Further mixing and digestion take place while moving, and the digested quicklime is discharged through the discharge port at the bottom of the quicklime digester; and

2) Dedusting of dust-containing gas: the dust-containing gas in the sealed dust-removing hood is output from the dust-collecting outer interface of the sealed dust-removing hood to the dust-removing pipeline of the water-bath dust collector, and the dust-containing gas is sprayed into The water in the dedusting pool is dedusted by contacting with water, and the dedusted gas is discharged from the clean air outlet provided on the deduster housing.

According to still another aspect of the present invention, there is provided a quicklime digestion and dedusting method using the above-mentioned digestion and dedusting device comprising a three-stage quicklime digester, the method comprising the following steps:

1) Quicklime digestion: Put quicklime into the feed port of the third-stage quicklime digester, and then transport it to the first digestion section box through the sealed conveying section box, and pass through the upper or side of the first digestion section box. The water spray device sprays water on the quicklime material moving in the first digestion section so that the quicklime is mixed and digested while moving under the stirring action of the stirring shaft, and then enters the second digestion section box again under the stirring action of the stirring shaft Further mixing and digestion occurs while moving, and then enters the third digestion section box again under the agitation of the stirring shaft, further mixing and digestion occurs while moving, and the digested quicklime is discharged through the discharge port at the bottom of the quicklime digester ;and

2) Dedusting of dust-containing gas: the dust-containing gas in the sealed dust-removing hood is output from the dust-collecting outer interface of the sealed dust-removing hood to the dust-removing pipeline of the water-bath dust collector, and the dust-containing gas is sprayed into The water in the dedusting pool is dedusted by contacting with water, and the dedusted gas is discharged from the clean air outlet provided on the deduster housing.

Compared with the prior art, the present invention has the following beneficial technical effects:

1. Combining the advantages of impact water bath dust removal technology and filter water film dust removal technology, it can capture large particles and fine dust in a targeted manner, and the dust removal efficiency is as high as 99.9%.

2. The water level in the dust collector can be adjusted during the operation of the equipment to achieve high purification efficiency, while ensuring low operating resistance of the purification device and low energy consumption of the equipment.

3. The overflow pool is used to well control the fluctuation range of the liquid level in the cylinder of the purification device, to ensure the stable purification efficiency of the purification device, and to protect the fan.

4. Dust removal sewage can be recycled after sewage treatment, reducing sewage discharge and preventing secondary pollution.

5. The setting of the V-shaped dust removal pool and the sewage sludge discharge device at the bottom of the pool enables the discharge and recycling of dust removal sewage sludge, automatic control of water replenishment, and a high degree of automation.

6. The dust removal pipeline of the present invention is inserted into the dust removal pool from top to bottom from the middle, so that the dust removal pool can be set at a lower position or underground, saving land and avoiding pollution.

7. The present invention effectively solves the problem of poor effect of quicklime digestion and dust removal, and solves the problem of environmental pollution caused by the existing quicklime digestion of a large amount of dust and flue gas.

In addition, the present invention also has the following beneficial technical effects:

8. Compared with the single-stage digester, the digestibility increases by 1 to 2 times, the degree of digestion is high, and the scientific digestion process parameters maximize the complete digestion of quicklime. During digestion, less heat is lost, ie the temperature drop is lower. The dust in the exhaust gas is significantly reduced, reducing the burden of subsequent dust removal. Stirring power is shared by multiple stirring shafts to reduce the wear of driving equipment.

9. There are continuous conveying screw blades in the box body of the sealed conveying section, and a spiral seal is formed between the inner wall of the sealed conveying section box and the continuous conveying spiral blades, and only quicklime is allowed to advance into the digesting section box, which can Effectively prevent the steam from flowing back to the material inlet to cause compaction or affect the weighing accuracy of the belt scale.

10. Double-shaft stirring is adopted, which has multiple functions and functions such as stirring, crushing agglomeration and self-cleaning; increasing the stirring frequency of quicklime, so that quicklime and water are mixed evenly and react fully; the stirring blades are made of manganese steel plate welded hard alloy blades ,Extended service life.

11. Due to the adoption of multi-stage digestion and the automatic control of water volume, the digestion effect is very good, and the dust generated is also greatly reduced, which greatly improves the external environment of the digestion site. The dust concentration in the digestion area is far lower than the national discharge concentration Standards, control the environmental pollution of the current digestion area.

12. Aiming at the maintenance blind spot below the first-level digestion section of the multi-stage digester, an effective expanded maintenance method is provided, which solves the difficult problem of multi-stage digester maintenance.

Description of drawings

Fig. 1 is a structural diagram of a water bath deduster device of the present invention;

Fig. 2 is a structural diagram of a control system for the water bath dust collector of the present invention.

Fig. 3 is a structural schematic diagram of (upper and lower) two-stage digester of the present invention.

Fig. 3a is a schematic structural view of the (upper and lower) two-stage digester of the present invention in which the initial water supply pipe L0 of the water spray device 5 is connected to the hot water outlet of the external heat exchanger X4.

Fig. 4 is a top structural schematic diagram of the digester shown in Fig. 2 of the present invention.

Fig. 5 is a schematic left view of the digester shown in Fig. 2 of the present invention.

Fig. 6 is a schematic structural view of the (upper and lower) three-stage digester of the present invention.

Reference signs:

Q1: dust collector; Q2: dust removal pool; Q201: water supply pipe; Q202: water supply pipe valve; Q203: sewage sludge discharge device; Q204: water pressure gauge; Q3: dust collector shell; Q301: water level adjustment hole; Q302: Card release slot; Q303: clean air outlet; Q4: dust removal pipe; Q401: submerged pipe nozzle; Q5: overflow water seal pool; Q501: cover plate; Q502: overflow pipe; Q503: overflow pipe valve; Q6: Water level adjustment device; Q601: water level adjustment plate; Q602: screw rod; Q603: regulating valve; Q7: bracket; Q701: first group of wire mesh; Q702: second group of wire mesh; Q703: sealing card; Q8: spraying head; Q9: water retaining and defogging plate; Q10: control system.

In Fig. 3-6, 1: quicklime digester; 2-feed inlet; 201-automatic sealing valve; 3-sealed conveying section box; 301-conveying screw blade; 4-first digestion section box; The first bed or the bed in the first digestion section box; 401a and 401b-the first stirring shaft; 402-stirring blade; 5-water spray device; 501-automatic flowmeter water valve; 502-retractable sprinkler head; 6 -sealed dust cover; 601-dust collection external interface; 7-first (upper) digestion box feeding place and opening; 7a-second (middle) digestion box feeding place and opening; 8- The second digestion section box; 8a-the second bed or the bed in the second digestion section box; 801a and 801b-the second stirring shaft; 9-discharge port; 10-digestion box maintenance device; 10a-digestion Box maintenance device door; 10b digestion box maintenance device door movable connection device; 11-first driving device; 11a-first coupling; 11b-first gear box; 11c-first bearing seat; 12-second Driving device; 12a-the second coupling; 12b-the second gear box; 12c-the second bearing seat; 13-the third driving device; 13a-the third coupling; 13b-the third gear box; 13c-the first Three bearing seats; 14-the third digestion section box; 14a-the third bed or the bed in the third digestion section box; 1401a and 1401b-the third stirring shaft (pair); L0-initial water supply pipeline; X4- Heat exchange device; X5-cold water; X6-heating gas (such as hot air of ring cooler).

Detailed ways

According to a first embodiment of the present invention, a water bath deduster is provided:

A water bath dust collector, the dust collector Q1 includes:

Dust removal pool Q2;

The dust collector housing Q3 located above the dust removal pool Q2;

Dust removal pipe Q4,

One end of the dust removal pipe Q4 is externally connected to the output end of one or more dust-containing gas collection devices (such as the dust removal interface of the lime digester), and the other end passes through the dust collector shell Q3 from top to bottom and extends into the bottom of the dust collector shell Q3 The dedusting pool Q2. One end of the dust removal pipeline Q4 extending into the dust removal pool Q2 is provided with a submerged pipeline nozzle Q401. Wherein the end of the submerged pipeline nozzle Q401 is a network structure or a porous structure.

Preferably, the dust removal pipeline Q4 passes through the middle of the dust collector housing Q3.

Preferably, the dust remover Q1 further includes: an overflow water-sealed pool Q5 located on one side of the dust removal pool Q2. Between the dust removal pool Q2 and the overflow water seal pool Q5, a water level adjustment hole Q301 is provided at the lower end of the dust collector housing Q3 side.

Preferably, a locking slot Q302 and a water level adjusting device Q6 are provided on the outside of the dust collector housing Q3 next to the water level adjusting hole Q301. The water level regulating device Q6 includes a water level regulating plate Q601, a screw rod Q602, and a regulating valve Q603. The water level regulating plate Q601 is stuck in the card slot Q302. One end of the screw rod Q602 is connected with the water level regulating plate Q601, and the other end of the screw rod Q602 is connected with the regulating valve Q603. The vertical width of the water level regulating plate Q601 is slightly larger than the vertical width of the water level regulating hole Q301.

Preferably, the dust collector Q1 further includes: a cover plate Q501 arranged above the overflow water-sealed pool Q5. One end of the cover plate Q501 is connected to the dust collector housing Q3, and the other end is inserted into the overflow water sealing pool Q2.

Preferably, a through hole is opened on the cover plate Q501, and the screw rod Q602 passes through the through hole.

Preferably, an overflow pipe Q502 is arranged on the upper part of the overflow water-sealed pool Q5. Used to adjust the water level in overflow water seal tanks.

Preferably, the overflow pipe Q502 is provided with an overflow pipe valve Q503.

Preferably, a water supply pipe Q201 is provided on the dedusting pool Q2. Used to replenish water in the dedusting pool.

Preferably, the water supply pipe Q201 is provided with a water supply pipe valve Q202.

Preferably, the bottom of the dust removal pool Q2 is funnel-shaped or "V"-shaped. A sewage sludge discharge device Q203 is installed at the bottom of the dust removal pool Q2.

Preferably, a water pressure gauge Q204 is also provided in the sewage sludge discharge device Q203.

As a preference, a bracket Q7 is arranged above the dust removal pool Q2 in the dust collector housing Q3. A first set of wire mesh Q701 (preferably a V-shaped filter mesh or a V-shaped wire mesh) is arranged below the support Q7 as a bubble breaking point. A second group of wire mesh Q702 is arranged above the bracket Q7, preferably an inverted V-shaped wire mesh.

Preferably, the first group of wire meshes Q701 and/or the second group of wire meshes Q702 are staggered and arranged obliquely. A sealing card Q703 is arranged at the intersection.

Preferably, a sprinkler head Q8 is arranged above the second group of wire mesh Q702. It is used to spray dedusting water or dedusting liquid on the second group of wire mesh Q702.

As a preference, a water blocking and defogging plate Q9 is arranged above the sprinkler head Q8. A clean air outlet Q303 is arranged on the dust collector housing above the water retaining and demisting plate Q9.

Preferably, the dust remover also includes a control system Q10, and a water pressure gauge Q204, an overflow pipe valve Q503 and a water supply pipe valve Q202 are connected to the control system Q10. The control system Q10 controls the water pressure gauge Q204, the overflow pipe valve Q503 and the water supply pipe valve Q202.

According to the second embodiment provided by the present invention, there is provided a method for using a water-bath dust collector or a method for removing dust using the above-mentioned water-bath dust collector, the method comprising the following steps:

(1) Store water in the dedusting pool through the water supply pipe Q201, adjust the water level regulating plate Q601, make the water level in the dedusting pool Q2 reach a predetermined value, and close the water supply pipe valve Q202;

(2) Dusty gas (such as dust and flue gas from the dust removal port of the quicklime digester) enters the dust collector Q1 from the middle of the dust collector housing Q3 through the dust removal pipe Q4 from top to bottom. The flow rate is adjusted by adjusting the water level adjustment device Q6 so that the dust removal pipe Q4 is inserted into a certain position in the dust removal pool Q2, and the end of the dust removal pipe Q4 inserted into the water is provided with a network structure underwater pipe nozzle Q401;

(3) The dust-laden gas with a certain speed flows through the dust removal pipeline Q4 and is ejected at a relatively high speed at the nozzle Q401 of the submerged pipeline. After impacting the water layer, it enters the water, the direction of movement of the gas changes, and the dust particles due to inertia The effect will continue to move in the original direction, and most of the dust particles will remain in the water after adhering to the water. The flue gas hits the water body and is cut into small bubbles by the network structure of the nozzle Q401 of the submerged pipeline, which increases the contact area between the flue gas and water. , strengthen the capture of dust by dust removal water, and realize the first-level impact water bath dust removal;

(4) After water bath dedusting, most of the dust in the flue gas is removed, and the remaining part of the fine particle dust passes through the first set of wire mesh Q701 to form the first water film and the second set of wire mesh Q702 to form the second water film , Two water films capture the fine dust in the flue gas, realizing the second-stage filter water film dedusting, the purified gas is discharged from the outlet after being treated by the water retaining and defogging plate Q9.

(5) Dust removal pool Q2 has been turned into sewage after long-term dust removal, and the sewage is discharged from the sewage sludge discharge device Q203 at the bottom of the funnel-shaped or "V"-shaped dust removal pool Q2, and water is replenished from the water supply pipe Q201.

According to a third embodiment of the present invention, quicklime digestion and dust removal equipment is provided, which includes the above-mentioned water-bath dust collector Q1 and quicklime digester, wherein the water-bath dust collector Q1 is connected to the dust collection external interface of the quicklime digester through a dust removal pipeline Q4 Pass.

Preferably, the quicklime digester is a two-stage quicklime digester 1 or a three-stage quicklime digester 1 . The water bath dust collector Q1 is connected with the dust collection external interface 601 of the digester 1 through a dust removal pipe Q4.

That is, a quicklime digestion and dedusting device, which includes the above-mentioned water-bath dust collector Q1 and quicklime digester 1, and the water-bath dust collector Q1 communicates with the dust collection external interface 601 of the digester 1 through a dust removal pipeline Q4; wherein the quicklime digester 1 A two-stage quicklime digester 1 or a three-stage quicklime digester 1 can be used.

The above-mentioned two-stage quicklime digester 1 includes: a feed inlet 2, a sealed conveying section box 3 whose front end communicates with the feed inlet 2, and a first digestion section connected with the rear end of the sealed conveying section box 3 Casing 4, the water spray device 5 on the top or side of the first digestion section casing 4; the sealed dust cover 6 on the top of the first digestion section casing 4, located in the first digestion section casing 4 and away from the inlet The feeding part of the upper digestion box at the end of the material opening 2 and the opening 7, the second digestion section box 8 below the first digestion section box body 4, is located in the second digestion section box body 8 and is close to the inlet The discharge port 9 at the end of the feed port 2; wherein: a pair of first stirring shafts 401a and 401b with stirring blades 402 are housed in the first digestion section casing 4, and the pair of first stirring shafts 401a and 401b The two are driven by the first driving device 11 and the rotation directions of the two are opposite; in addition, a pair of second stirring shafts 801a and 801b with stirring blades are installed in the second digestion section casing 8, and the second stirring shafts 801b of the pair are installed. Both the stirring shafts 801a and 801b are driven by the second driving device 12 and their rotation directions are opposite;

The three-stage quicklime digester 1 described above includes: a feed inlet 2, a sealed delivery section box 3 whose front end communicates with the feed inlet 2, and a first digestion section connected with the rear end of the sealed delivery section box 3 Casing 4, the water spray device 5 on the top or side of the first digestion section casing 4; the sealed dust cover 6 on the top of the first digestion section casing 4, located in the first digestion section casing 4 and away from the inlet The feeding part of the upper digestion box at the end of the material opening 2 and the opening 7, the second digestion section box 8 below the first digestion section box body 4, is located in the second digestion section box body 8 and is close to the inlet The second digestion box at the end of the feed port 2 and the feed opening (i.e. the discharge port) 7a, the third digestion section box 14 below the second digestion section box 8, is located in the third digestion section In the casing 14 and away from the discharge port 9 at the end of the feed port 2; wherein: a pair of first stirring shafts 401a and 401b with stirring blades 402 are housed in the first digestion section casing 4, the pair of Both the first stirring shafts 401a and 401b are driven by the first driving device 11 and the rotation directions of the two are opposite; a pair of second stirring shafts 801a and 801b with stirring blades are installed in the second digestion section casing 8, which A pair of second agitating shafts 801a and 801b are both driven by the second driving device 12 and the rotation directions of the two are opposite; a pair of third agitating shafts 1401a and 801b with agitating blades are installed in the third digestion section casing 14 1401b, the pair of third agitating shafts 1401a and 1401b are driven by the third driving device 13 and their rotation directions are opposite;

In the above two digesters, preferably, one 801a of the second stirring shafts 801a and 801b is located directly below the one 401a of the first stirring shafts 401a and 401b, and the rotation directions of the two stirring shafts 401a and 801a are opposite.

For the tertiary digester, it is preferred that one 801a of the second stirring shafts 801a and 801b is located directly below the one 401a of the first stirring shafts 401a and 401b, and that both of them 401a and 801a rotate in opposite directions , and one 1401a of the third stirring shafts 1401a and 1401b is located directly below one 801a of the second stirring shafts 801a and 801b, and both of them 401a and 801a rotate in opposite directions.

Preferably, the input end of the water spray device 5 is externally connected to the initial water supply pipeline L0, and the output end is connected to a plurality of retractable sprinkler heads 502 located in the upper part of the first digestion section box 4 through an automatic flowmeter water valve 501; preferably Preferably, the automatic flowmeter water valve 501 is electrically connected to the master control room so as to automatically control the water volume and has a cut-off function; further preferably, a plurality of retractable sprinkler heads 502 are telescopically adjusted according to the length of the digestion section box, and the lengths are staggered. arranged.

In addition, the initial water supply pipe L0 of the sprinkler 5 is connected to the hot water outlet of the external heat exchanger X4. The heat exchanger X4 has a cold water inlet X5 and a hot water outlet as well as a hot heating gas inlet X6 and an exchanged cooling gas outlet. As shown in Figure 3a.

Preferably, the height of the sealed dust removal cover 6 provided above the first digestion section box body 4 increases gradually along the material conveying direction of the box body 4, and the dust collection external interface 601 is located at the end of the dust removal cover 6, through which the dust collection external interface 601 is connected with the external dust collector or the pipeline of the dust removal system.

Preferably, on the casing of the two-stage quicklime digester 1 or the three-stage quicklime digester 1, a digester box overhaul device 10 is also provided, and the overhaul device 10 includes one or more digester box overhaul device doors 10a and one or more A digestive box maintenance device door movable connection mechanism 10b; preferably, one or more digestive box maintenance device door movable connection mechanisms 10b are installed on the bottom of the second box body or are installed on the second box body and the first box body at the same time The respective bottoms of the three casings, the bottom of the digestion box maintenance device door 10a are connected with the movable connection mechanism 10b of the digestion box maintenance device door, and the door 10a can rotate around the movable connection mechanism 10b, and the upper part of the digestion box maintenance device door 10a is connected with the movable connection mechanism 10b. The upper part of the lower box is snap-connected, that is, the upper part of the door can be opened and closed.

In this application, a two-stage digester may also be referred to as an upper and lower two-stage digester, and a three-stage digester may also be referred to as an upper and lower three-stage digester.

According to another aspect of the present invention, there is provided a quicklime digestion and dedusting method using the above-mentioned digestion and dedusting device comprising a two-stage quicklime digester, the method comprising the following steps:

1) Quicklime digestion: Put quicklime into the feed port 2 of the two-stage quicklime digester 1, and transport it to the first digestion section box 4 through the sealed delivery section box 3, and pass through the first digestion section box 4 The water spray device 5 on the upper or side of the first digestion section box 4 sprays water to the quicklime material moving in the first digestion section box 4, so that the quicklime is mixed and digested while moving under the agitation of the stirring shaft, and then enters the second digestion section box In the body 8, further mixing and digestion occur while moving under the stirring effect of the stirring shaft again, and the quicklime after the digestion is discharged through the discharge port 9 at the bottom of the quicklime digester 1; and

2) Dedusting of dust-containing gas: the dust-containing gas in the sealed dust-removing cover 6 is output from the dust-collecting outer interface 601 of the sealed dust-removing cover 6 to the dust-removing pipeline Q4 of the water-bath dust collector Q1, and the dust-containing gas passes through the liquid of the dust-removing pipeline Q4. The nozzle Q401 of the lower pipe is sprayed into the water of the dust removal pool Q2, and the dust is removed by contacting with the water, and the gas after dust removal is discharged from the clean air outlet Q303 provided on the dust collector housing.

According to still another aspect of the present invention, there is provided a quicklime digestion and dedusting method using the above-mentioned digestion and dedusting device comprising a three-stage quicklime digester, the method comprising the following steps:

1) Quicklime digestion: Put quicklime into the feed port 2 of the three-stage quicklime digester 1, and then transport it to the first digestion section box 4 through the sealed delivery section box 3, and pass through the first digestion section box 4 The water spray device 5 on the upper or side of the first digestion section box 4 sprays water to the quicklime material moving in the first digestion section box 4, so that the quicklime is mixed and digested while moving under the agitation of the stirring shaft, and then enters the second digestion section box The body 8 is further mixed and digested while moving under the stirring action of the stirring shaft, and then enters the third digestion section box 14 to further mix and digest while moving under the stirring action of the stirring shaft, and the digested The quicklime is discharged through the outlet 9 at the bottom of the quicklime digester 1; and

2) Dedusting of dust-containing gas: the dust-containing gas in the sealed dust-removing cover 6 is output from the dust-collecting outer interface 601 of the sealed dust-removing cover 6 to the dust-removing pipeline Q4 of the water-bath dust collector Q1, and the dust-containing gas passes through the liquid of the dust-removing pipeline Q4. The nozzle Q401 of the lower pipe is sprayed into the water of the dust removal pool Q2, and the dust is removed by contacting with the water, and the gas after dust removal is discharged from the clean air outlet Q303 provided on the dust collector housing.

Example 1

A water bath dust collector, the dust collector Q1 includes:

Dust removal pool Q2;

The dust collector housing Q3 located above the dust removal pool Q2;

Dust removal pipe Q4,

One end of the dust removal pipeline Q4 is externally connected to the dust removal interface of the lime digester, and the other end passes through the dust collector housing Q3 from top to bottom and extends into the dust removal pool Q2 below the dust collector housing Q3. One end of the dust removal pipeline Q4 extending into the dust removal pool Q2 is provided with a submerged pipeline nozzle Q401. Wherein the end of the submerged pipeline nozzle Q401 is a mesh structure or a porous structure.

The dust removal pipe Q4 passes through the middle of the dust collector housing Q3.

The dust remover Q1 also includes: an overflow water sealing pool Q5 located on one side of the dust removal pool Q2. Between the dust removal pool Q2 and the overflow water seal pool Q5, a water level adjustment hole Q301 is provided at the lower end of the dust collector housing Q3 side.

On the outer side of the dust collector housing Q3 of the water level adjustment hole Q301, a card slot Q302 and a water level adjustment device Q6 are provided. The water level regulating device Q6 includes a water level regulating plate Q601, a screw rod Q602, and a regulating valve Q603. The water level regulating plate Q601 is stuck in the card slot Q302. One end of the screw rod Q602 is connected with the water level regulating plate Q601, and the other end of the screw rod Q602 is connected with the regulating valve Q603. The width of the water level regulating plate Q601 is slightly larger than the width of the water level regulating hole Q301.

The dust collector Q1 also includes: a cover plate Q501 arranged above the overflow water-sealed pool Q5. One end of the cover plate Q501 is connected to the dust collector housing Q3, and the other end is inserted into the overflow water sealing pool Q2.

A through hole is opened on the cover plate Q501, and the screw rod Q602 passes through the through hole.

An overflow pipe Q502 is arranged on the upper part of the overflow water-sealed pool Q5. Used to adjust the water level in overflow water seal tanks.

A water supply pipe Q201 is arranged on the dust removal pool Q2. Used to replenish water in the dedusting pool.

The bottom of the dust removal pool Q2 is funnel-shaped or "V"-shaped. A sewage sludge discharge device Q203 is installed at the bottom of the dust removal pool Q2.

Wherein, a bracket Q7 is arranged above the dust removal pool Q2 in the dust collector housing Q3. A first set of wire mesh Q701 (preferably a V-shaped filter mesh or a V-shaped wire mesh) is arranged below the support Q7 as a bubble breaking point. A second group of wire mesh Q702 is arranged above the bracket Q7, preferably an inverted V-shaped wire mesh.

Wherein the first group of wire meshes Q701 and/or the second group of wire meshes Q702 are staggered and arranged obliquely. A sealing card Q703 is arranged at the intersection.

Wherein a sprinkler head Q8 is arranged above the second group of wire mesh Q702. It is used to spray dedusting water or dedusting liquid on the second group of wire mesh Q702.

Wherein, a water retaining and defogging plate Q9 is arranged above the sprinkler head Q8. A clean air outlet Q303 is arranged on the dust collector housing above the water retaining and demisting plate Q9.

In this embodiment, the dust removal efficiency reaches 99.9%. And this embodiment can quickly discharge sewage sludge

Example 2

Embodiment 1 is repeated, except that an overflow pipe valve Q503 is provided on the overflow pipe Q502. The water supply pipe Q201 is provided with a water supply pipe valve Q202.

In this embodiment, the dust removal efficiency reaches 99.9%. The device of this embodiment can realize real-time control of the position of the water surface in the dust removal pool.

Example 3

Repeat Example 1, except that a water pressure gauge Q204 is also provided in the sewage sludge discharge device Q203.

In this embodiment, the dust removal efficiency reaches 99.9%. The device in this embodiment can detect the content of sewage sludge in the dust removal pool, and can discharge the sewage sludge in time.

Example 4

Repeat Example 1. Only this dust remover also includes a control system Q10, a water pressure gauge Q204, an overflow pipe valve Q503 and a water supply pipe valve Q202 are connected to the control system Q10. The control system Q10 controls the water pressure gauge Q204, the overflow pipe valve Q503 and the water supply pipe valve Q202. The device of this embodiment can realize only dust removal.

In this embodiment, the dust removal efficiency reaches 99.9%.

Application Example 1

A kind of using method of water bath deduster, this method comprises the following steps:

(1) Store water in the dedusting pool through the water supply pipe Q201, adjust the water level regulating plate Q601, make the water level in the dedusting pool Q2 reach a predetermined value, and close the water supply pipe valve Q202;

(2) The dust flue gas from the dust removal port of the quicklime digester enters the dust collector Q1 from top to bottom through the dust removal pipe Q4 from the middle of the dust collector housing Q3, and the water level is adjusted according to the nature of the flue gas and the flow rate of the flue gas Device Q6, so that the dust removal pipeline Q4 is inserted into a certain position in the dust removal pool Q2, and the dust removal pipeline Q4 is inserted into the underwater end to be provided with a network structure underwater pipeline nozzle Q401;

(3) The dust-laden gas with a certain speed is sprayed out at a relatively high speed at the nozzle Q401 of the submerged pipe through the dust removal pipe Q4, and enters the water after impacting the water layer. The direction of movement of the gas changes, and the dust particles due to inertia The effect will continue to move in the original direction, and most of the dust particles will remain in the water after adhering to the water. The flue gas hits the water body and is cut into small bubbles by the network structure of the nozzle Q401 of the submerged pipeline, which increases the contact area between the flue gas and water. , strengthen the capture of dust by dust removal water, and realize the first-level impact water bath dust removal;

(4) After water bath dedusting, most of the dust in the flue gas is removed, and the remaining part of the fine particle dust passes through the first set of wire mesh Q701 to form the first water film and the second set of wire mesh Q702 to form the second water film , Two water films capture the fine dust in the flue gas, realizing the second-stage filter water film dedusting, the purified gas is discharged from the outlet after being treated by the water retaining and defogging plate Q9.

(5) Dust removal pool Q2 has been turned into sewage after long-term dust removal, and the sewage is discharged from the sewage sludge discharge device Q203 at the bottom of the funnel-shaped or "V"-shaped dust removal pool Q2, and water is replenished from the water supply pipe Q201.

Comparative example 1

The equipment similar to that in Figure 2 is adopted, except that the water level adjustment device adopts the structure of patent 00224384.9. As a result, the cover plate needs to be opened to adjust the liquid level, which is not easy to operate, and because the water level adjustment is not in place, the dust removal pipe cannot be inserted into the dust removal pool. Good control, as a result, the dust removal efficiency is also reduced to below 87%.

Comparative example 2

The equipment similar to that in Figure 2 is used, except that the submerged pipeline of the dust removal pipeline does not have a mesh structure nozzle, but is directly inserted into the dust removal pool as a pipe, and as a result, the flue gas has a greater impact on the water and forms larger bubbles , so that the dust or particles in the air bubbles are not in sufficient contact with the water, and the dust removal efficiency is reduced to 83%.

Claims (26)

1. a kind of wet dust collector (Q1), the deduster (Q1) include：

Dedusting pond (Q2)；

Shell of dust remover (Q3) above dedusting pond (Q2)；

Cleaning shaft (Q4),

It is characterized in that：One end of cleaning shaft (Q4) is external to the output end of one or more collection devices containing dusty gas, The other end passes through shell of dust remover (Q3) and stretches into the dedusting pond (Q2) below shell of dust remover (Q3), dedusting from top to bottom One end that pipeline (Q4) stretches into dedusting pond (Q2) is provided with liquid down tube channel showerhead (Q401), wherein liquid down tube channel showerhead (Q401) end is reticular structure or porous structure；

The deduster (Q1) further includes：Overflow water seal water pond (Q5) positioned at the side dedusting pond (Q2), and in dedusting pond (Q2) between overflow water seal water pond (Q5), in the water level regulation hole that the lower end of the side shell of dust remover (Q3) is issued (Q301)；

It is equipped with card on the outside of water level regulation hole (Q301) other shell of dust remover (Q3) and puts slot (Q302) and water level control apparatus (Q6), which includes water level regulation plate (Q601), screw rod (Q602), regulating valve (Q603), water level tune Section plate (Q601) card is placed on the card and puts in slot (Q302), and one end of screw rod (Q602) is connect with water level regulation plate (Q601), The other end of screw rod (Q602) is connect with regulating valve (Q603), and wherein the vertical width of water level regulation plate (Q601) is slightly larger than water The vertical width of position adjustment hole (Q301)；

The deduster (Q1) further includes：The cover board (Q501) being arranged above overflow water seal water pond (Q5), the one of cover board (Q501) End is connect with shell of dust remover (Q3), and the other end is inserted into overflow water seal water pond (Q5), is opened on cover board (Q501) there are one through-hole, Screw rod (Q602) passes through the through-hole.

2. wet dust collector according to claim 1, it is characterised in that：Cleaning shaft (Q4) is from shell of dust remover (Q3) Middle part passes through.

3. wet dust collector according to claim 1 or 2, it is characterised in that：The top overflow water seal water pond (Q5) is provided with Overflow pipe (Q502), for adjusting the water level in overflow water seal water pond.

4. wet dust collector according to claim 3, it is characterised in that：Overflow pipe (Q502) is equipped with overflow pipe valve (Q503)。

5. according to the wet dust collector described in any one of claim 1-2 or 4, it is characterised in that：On dedusting pond (Q2) It is provided with water supply pipe (Q201), for supplement water in dedusting pond.

6. wet dust collector according to claim 3, it is characterised in that：It is provided with water supply pipe on dedusting pond (Q2) (Q201), for supplement water in dedusting pond.

7. wet dust collector according to claim 5, it is characterised in that：Water supply pipe (Q201) is equipped with moisturizing pipe valve (Q202)。

8. wet dust collector according to claim 6, it is characterised in that：Water supply pipe (Q201) is equipped with moisturizing pipe valve (Q202)。

9. according to the wet dust collector described in any one of claim 1-2,4 or 6-7, it is characterised in that：Dedusting pond (Q2) Bottom is funnel-form, and the bottom dedusting pond (Q2) is equipped with sewage sludge tapping equipment (Q203).

10. wet dust collector according to claim 3, it is characterised in that：The bottom dedusting pond (Q2) is funnel-form, dedusting The bottom pond (Q2) is equipped with sewage sludge tapping equipment (Q203)；It is additionally provided with hydraulic pressure in sewage sludge tapping equipment (Q203) It counts (Q204).

11. wet dust collector according to claim 5, it is characterised in that：The bottom dedusting pond (Q2) is funnel-form, dedusting The bottom pond (Q2) is equipped with sewage sludge tapping equipment (Q203)；It is additionally provided with hydraulic pressure in sewage sludge tapping equipment (Q203) It counts (Q204).

12. wet dust collector according to claim 9, it is characterised in that：In sewage sludge tapping equipment (Q203) also It is provided with hydraulic gage (Q204).

13. according to the deduster described in any one of claim 1-2,4,6-8 or 10-12, wherein in shell of dust remover (Q3) be provided with holder (Q7) above dedusting pond (Q2) in, be provided with below holder (Q7) as bubble puncture a little the One group of woven wire (Q701) and second group of woven wire (Q702) is provided with above the holder (Q7).

14. deduster according to claim 3, wherein dedusting pond (Q2) the top setting in shell of dust remover (Q3) There is holder (Q7), is provided with below the holder (Q7) and punctures first group of woven wire (Q701) a little as bubble and in holder (Q7) top is provided with second group of woven wire (Q702).

15. deduster according to claim 5, wherein dedusting pond (Q2) the top setting in shell of dust remover (Q3) There is holder (Q7), is provided with below the holder (Q7) and punctures first group of woven wire (Q701) a little as bubble and in holder (Q7) top is provided with second group of woven wire (Q702).

16. deduster according to claim 13, wherein first group of woven wire (Q701) is V-type woven wire, second Group woven wire (Q702) is reverse V-shaped woven wire；First group of woven wire (Q701) and/or second group of woven wire (Q702) Alternating inclinations arrange, and point of intersection is provided with sealing card (Q703).

17. the deduster according to claims 14 or 15, wherein first group of woven wire (Q701) is V-type woven wire, Second group of woven wire (Q702) is reverse V-shaped woven wire；First group of woven wire (Q701) and/or second group of woven wire (Q702) alternating inclinations arrange, and point of intersection is provided with sealing card (Q703).

18. deduster according to claim 13, wherein being provided with sprinkler head above second group of woven wire (Q702) (Q8), it is used for spraying water in dust removal on second group of woven wire (Q702).

19. according to the deduster described in any one of claim 14-16, wherein above second group of woven wire (Q702) It is provided with sprinkler head (Q8), is used for spraying water in dust removal on second group of woven wire (Q702).

20. deduster according to claim 18, wherein it is provided with water blocking demisting plate (Q9) above sprinkler head (Q8), Net air outlet (Q303) is provided with above water blocking demisting plate (Q9) on shell of dust remover.

21. deduster according to claim 19, wherein it is provided with water blocking demisting plate (Q9) above sprinkler head (Q8), Net air outlet (Q303) is provided with above water blocking demisting plate (Q9) on shell of dust remover.

22. according to the deduster described in any one of claim 1-2,4,6-8,10-12,14-16,18 or 20-21, this is removed Dirt device further includes control system (Q10), hydraulic gage (Q204), overflow pipe valve (Q503) and moisturizing pipe valve (Q202) and control system (Q10) it connects, control system (Q10) controls hydraulic gage (Q204), overflow pipe valve (Q503) and moisturizing pipe valve (Q202).

23. deduster according to claim 3, which further includes control system (Q10), and hydraulic gage (Q204) overflows Flow tube valve (Q503) and moisturizing pipe valve (Q202) are connect with control system (Q10), and control system (Q10) controls hydraulic gage (Q204), overflow pipe valve (Q503) and moisturizing pipe valve (Q202).

24. a kind of method being dusted using any one of the claim 1-23 wet dust collectors, this method include with Lower step：

(1) by water supply pipe (Q201) water storage into dedusting pond, water level regulation plate (Q601) is adjusted, is made in dedusting pond (Q2) Water level reaches predetermined value, closes moisturizing pipe valve (Q202)；

(2) dusty gas is entered in the middle part of shell of dust remover (Q3) in deduster (Q1) from top to bottom by cleaning shaft (Q4), By the uninterrupted of smoke property and flue gas, water level control apparatus (Q6) is adjusted, cleaning shaft (Q4) is made to be inserted into dedusting pond (Q2) certain position in, cleaning shaft (Q4) are inserted into underwater one and are provided with pipeline spray under the liquid of reticular structure or porous structure Head (Q401)；

(3) dusty gas flows through cleaning shaft (Q4) and is sprayed at liquid down tube channel showerhead (Q401), and percussion is generated to water layer Enter in water afterwards, the direction of motion of gas changes, and grit is since the effect of inertia then continues to move by original direction, wherein greatly It is stayed in water after part grit and water adhesion, reticular structure of the smoke-shock water body through liquid down tube channel showerhead (Q401) cuts into small Bubble increases the contact area of flue gas and water, strengthens capture of the water in dust removal to dust, realizes that first order impulse type water bath removes Dirt；

(4) pass through water bath dust-removing, most of dust is removed in flue gas, and remainder particle dust passes through first group of wire The second moisture film that first of the moisture film and second group of woven wire (Q702) that net (Q701) is formed are formed, twice moisture film is to flue gas In fine dust captured, realize second level filtering type water film dedusting, purified gas through water blocking demisting plate (Q9) at It is discharged from exit after reason；

(5) dedusting pond (Q2) passes through prolonged dedusting, has turned into sewage, by the sewage from the bottom funnel-form dedusting pond (Q2) The sewage sludge tapping equipment (Q203) in portion is discharged, and moisturizing is carried out from water supply pipe (Q201).

25. quicklime slaking and dust-extraction unit, it includes the wet dust collector (Q1) described in any one of claim 1-23 And burnt lime digester, wherein wet dust collector (Q1) are external by a cleaning shaft (Q4) and gathering dust for burnt lime digester Mouth is connected.

26. quicklime slaking according to claim 25 and dust-extraction unit, it is characterised in that：The burnt lime digester is Two-stage burnt lime digester (1) or three-level burnt lime digester (1).