CN204182256U - A kind of washing degree of depth dust arrester - Google Patents

Abstract

The utility model discloses a water washing deep dust removal device, which mainly includes a washing section flue, a circulating water pool, a water washing spray layer, a water washing dust removal circulation pump, a water washing dust removal demister flushing water pump, an absorption tower mist eliminator flushing water pump, a water washing dust removal Mist eliminator, first rinse head and second rinse head. In addition, it also includes the packing layer, the washing water collection device of the washing dust and mist remover and the supplementary interface of process water. The water washing deep dust removal device of the utility model is installed downstream of the wet desulfurization absorption tower. On the one hand, it can continue to capture part of the dust, on the other hand, it can dilute the dusty liquid droplets, and finally capture the dust in the flue gas through the water washing dedusting and mist eliminator. The mist droplets can reduce the dust carrying amount in the flue gas, so that the flue gas can be treated in depth. The utility model effectively solves the technical problem of flue gas dust reaching the standard or even ultra-low emission, can achieve a certain desulfurization effect, greatly reduces the investment cost, saves land, and has high layout and installation flexibility.

Description

A water washing deep dust removal device

technical field

The utility model belongs to the technical field of flue gas dedusting, relates to a dedusting device, in particular to a deep water washing dedusting device installed downstream of a wet desulfurization device. The deep washing dust removal device of the utility model can realize the purpose of deep washing the flue gas.

Background technique

With the increasingly serious problem of environmental pollution and the gradual enhancement of people's awareness of environmental protection, governments around the world, especially our government, are gradually implementing strict coal-fired flue gas emission standards in terms of flue gas emissions. A large amount of flue gas produced by thermal power plants and other enterprises needs to undergo procedural flue gas desulfurization and dust removal before being discharged into the atmosphere. Flue gas desulfurization treatment methods can often be divided into dry, semi-dry, and wet desulfurization processes. At present, most thermal power plants use wet desulfurization process for flue gas desulfurization.

Wet desulfurization process, also known as lime/limestone wet desulfurization (FGD for short) process, the high-temperature flue gas from the outlet of the induced draft fan of the power plant boiler is pressurized by the FGD fan and then cooled to about 100°C through the heat exchanger to enter the wet desulfurization process The absorption tower performs wet desulfurization, and the lime/limestone slurry is sprayed on the rising flue gas in the wet desulfurization absorption tower, the sulfur dioxide in the flue gas is absorbed by the slurry, and the by-product gypsum is obtained at the bottom of the wet desulfurization absorption tower, and the sulfur dioxide is removed The flue gas is discharged into the atmosphere after removing a large amount of entrained water vapor through the demister.

Before the flue gas is discharged into the atmosphere, in addition to desulfurization treatment, dust removal is generally required. Commonly used dust removal methods can be divided into electrostatic dust removal, bag dust removal, wet dust removal and so on. At present, most domestic coal-fired power plant flue gas dust removal projects use electric dust collectors and electric bag dust collectors.

In order to reduce the dust content in the flue gas emission, a dust collector (electrostatic precipitator or bag dust collector) is usually installed in front of the induced draft fan, but with the increasing emission standards and the wet desulfurization device behind the induced draft fan, some gypsum and The carryover of dissolved salt (lime/limestone slurry) makes it difficult to meet the dust standard in the final flue gas emission. In order to solve the final dust emission concentration problem, there are several solutions as follows:

(1) By increasing the number of electric fields (or bag series), increasing low-temperature technology (reducing the temperature of flue gas, improving the efficiency of electrostatic precipitator), moving plates and other technologies, the flue gas at the outlet of the dust collector (electrical precipitator or bag precipitator) Medium dust reaches very low concentrations.

Utility model patent 201010228281.8 discloses a combined dust collector of electric dust removal and electric bag dust removal, including the inlet gas flue, electric cloth bag dust removal area and electric dust removal area. There are 2 stages and 2 stages arranged from front to back in the electric cloth bag dust removal area As for the airflow guide valve and the airflow distribution plate above, the airflow guide valves at all levels are arranged at 90 degrees to each other. The utility model adjusts the inlet airflow of the dust collector through the airflow guide valve and the airflow distribution plate, so that the dust collector is not affected by dust particles and dust concentration, and can control various physical and chemical characteristics and fine dust particles in the electric field with high wind speed. can be collected efficiently.

Utility model patent 200910143945.8 discloses a flue gas purification system and its method. The content disclosed in this utility model includes a flue and a chimney, in which a dry dust collector, an induced draft fan, and a water spray pipe are sequentially arranged in sequence; the lower part of the chimney is provided with a liquid spray device, and the upper part is provided with a mist eliminator; The dry dust collector mentioned above is a ceramic multi-tube dust collector. The method of flue gas purification is to dry the flue gas in the flue for dust removal, and then use the water spray pipe installed in the flue to perform wet dust removal and cool down the flue gas; enter the chimney and spray alkaline droplets from the liquid spray device The upward movement completes gas-liquid mixing to realize desulfurization. Compared with the existing technology, the advantage of this utility model is that it utilizes the idle space of the flue to realize the integration of dust removal, desulfurization and smoke exhaust, and provides a new device for flue gas purification with simple structure, acid resistance and corrosion resistance, and convenient maintenance. craft.

Utility model patent 200510032204.4 discloses a flue-type smoke dust removal and purification device, including a flue, a spray pipe is installed at the front end of the flue, there is a nozzle on the spray pipe, a water inlet pipe is connected outside the spray pipe, and the front end of the flue is There is a cleaning waste liquid outlet at the bottom, a set of honeycomb ceramic adsorption tubes are installed at the rear end of the flue, a cleaning water pipe is installed at the front end of the honeycomb ceramic adsorption tube, and a flushing tube is installed on the washing water pipe, and the opening of the flushing tube is at the entrance of the honeycomb ceramic adsorption tube , there is an adsorption waste liquid outlet under the rear end of the flue. The main advantage of the utility model is that the secondary treatment of the flue gas is realized, and the fine dust in the flue dust after water washing treatment and the harmful gas that cannot be treated by alkali can be adsorbed.

Utility model patent 02114598.9 discloses a thermal power plant atomization water washing dedusting and desulfurization device, which is mainly composed of three parts: speed-up water washing pump tower, multi-energy atomization water washing tower and smoke and sewage filter tower. The washing pump is electromechanically separated, the side of the impeller is porous, and the multi-energy atomizing water washing tower is equipped with multiple spiral channels and group atomizing nozzles, and is equipped with a speed-resistance screen group and multi-layer water tanks, and the upper part of the dust and sewage filtration tower is installed There are double rows of charcoal filter layers, and it is equipped with drying and exhaust coils, and the lower part is equipped with sewage filter bins. The main advantage of the utility model is that no matching tall chimney is needed.

(2) Add a wet electrostatic precipitator downstream of the wet desulfurization device. This method can also make the final emission concentration of dust in the flue gas reach a very low level.

Utility model patent 201020537350.9 discloses a water-covered dust removal and desulfurization device. The disclosed content of this utility model mainly includes dust removal, fan and desulfurization device. The desulfurization device is a flue gas and lime water reaction device. The flue gas or coal gas is discharged from the system after washing, dust removal and desulfurization. Positive pressure and negative pressure combination or negative pressure or positive pressure three structures, the positive pressure and negative pressure combination structure is that the dust removal device, fan and desulfurization device are connected by flanges in sequence; the negative pressure structure The dust removal device, the desulfurization device and the fan are sequentially connected by flanges; the positive pressure structure is that the fan, the dust removal device and the desulfurization device are connected by flanges in sequence. The utility model has the advantages of simple structure, easy manufacture, low cost, and small floor space. It can effectively reduce the temperature of the flue gas below 50 degrees, and the pressure of the final exhausted flue gas is below 1,000 Pa. The dust removal effect can reach hundreds of degrees. More than 99/%, Ringelmann blackness level 0, desulfurization efficiency reaches more than 95%.

For the above two methods of flue gas dust treatment, due to some objective reasons, the first method may not be able to achieve the low concentration standard of dust at the flue gas pipe outlet, and wet desulfurization will increase part of the dust, not all projects use this method Can meet emission standards. And adopt second kind of method though can play very good dedusting effect, but this method investment cost height, floor space is big.

Utility model content

The purpose of the utility model is to solve the technical problem that the flue gas dust reaches the standard or even ultra-low emission, and provides a water washing deep dust removal device. The device is installed in the downstream of the wet desulfurization device, which can achieve a certain desulfurization effect without causing secondary pollution and increasing the amount of slurry carried, and will not have a negative impact on the normal operation of the wet desulfurization device. It can be used in any process It can work under conditions; it can greatly reduce investment costs and save land.

In order to achieve the above object, the technical scheme that the utility model takes is as follows:

A water washing deep dust removal device, including a flue in the washing section, a circulating water pool, a water washing spray layer, a water washing dust removal circulation pump, a water washing dust removal and mist eliminator flushing pump, an absorption tower mist eliminator flushing water pump, a water washing dust removal and mist eliminator, and a first Equipment such as flushing nozzles and second flushing nozzles. The water washing deep dust removal device is installed downstream of the demister of the wet desulfurization absorption tower. The flue gas enters the flue of the washing section from the outlet of the wet desulfurization absorption tower, and the flue gas is washed by spraying water to absorb dust and dilute and absorb the wet desulfurization absorption tower. The solid content and salt content in the outlet droplets are finally removed by water washing, dedusting and mist eliminators, and then the flue gas is cleaned and discharged.

The upstream of the flue in the washing section is connected with the wet desulfurization absorption tower; the flue in the washing section is connected with the circulating water pool, and the circulating water pool is arranged at the lower part of the flue in the washing section; Inside the flue of the washing section, the water-washing spray layer is arranged above the circulating water pool, and the water-washing dedusting and mist eliminator is arranged downstream of the flue of the washing section.

The washing and dedusting circulating pump, the washing and dedusting demister flushing water pump, and the absorbing tower demister and demister washing pump are respectively connected with the circulating water pool, wherein the water washing and dedusting circulating pump is connected with the washing and spraying layer through the water pipeline, and the water washing and dedusting and demistering The flushing water pump of the fogger is connected with the first flushing nozzle through the water pipeline, and the flushing water pump of the demister of the absorption tower is connected with the second flushing nozzle through the water pipeline.

The first flushing nozzle is arranged inside the flue of the washing section, and is adjacent to the water washing dedusting demister; the second flushing nozzle is arranged inside the wet desulfurization absorption tower, and is connected to the wet desulfurization absorption tower demister. adjacent.

As a further improvement of the technical solution of the utility model, the water washing deep dust removal device also includes a packing layer and a washing water collection device for washing dust and mist eliminators; wherein, the packing layer is arranged inside the flue of the washing section and is located in the circulating water pool above; the flushing water collecting device of the washing dust and mist eliminator includes a flushing water collection part and a flushing water pipeline part, the flushing water collection part is located below the washing dust and mist eliminator, and the flushing water collection part passes through the flushing water pipe part and the circulating pool connected.

As a further improvement of the technical solution of the utility model, the water washing depth dedusting device also includes a process water replenishment interface, which is connected to the circulating water pool and is used to replenish the process water to the circulating water pool.

As a preference for the technical solution of the present utility model, the flue of the washing section is an integral flue, or is divided into the flue of the first washing section and the flue of the second washing section by the circulating pool, and the flue of the first washing section passes through the circulation The inner space of the pool communicates with the flue of the second washing section.

As an optimization of the technical solution of the utility model, the flue of the washing section is an integral flue, the circulating water pool is connected with the middle vertical section of the flue of the washing section, and the packing layer is horizontally arranged between the washing spray layer and the circulating water pool The inside of the middle vertical section of the flue of the washing section between them; or the circulating pool is connected with the horizontal section of the middle section of the flue of the washing section, and the packing layer is vertically arranged inside the flue of the washing section at the upper right obliquely, and the packing layer is in Between the water washing spray layer and the first flushing spray head.

As a preference of the technical solution of the present utility model, the flue of the washing section is divided into the flue of the first washing section and the flue of the second washing section by the circulating water pool, and the packing layer and the washing spray layer are both arranged in the first washing section Inside the flue, the packing layer is arranged horizontally between the washing spray layer and the circulating pool; or both the packing layer and the washing spray layer are arranged inside the flue of the second washing section, and the packing layer is arranged horizontally between the washing spray layer and the circulating pool.

As a preference of the technical solution of the utility model, the water-washing dedusting and mist eliminator is arranged horizontally or vertically downstream of the flue of the washing section.

As a preference of the technical solution of the utility model, the water washing dedusting and mist eliminator is horizontally arranged downstream of the flue of the washing section, and the first flushing nozzle is arranged under the water washing dust and mist eliminator.

As a preference of the technical solution of the utility model, the water washing dedusting and mist eliminator is arranged vertically downstream of the flue of the washing section, and the first flushing nozzle is arranged on the left side of the water washing dedusting and misting eliminator.

Compared with the prior art, the beneficial effects produced by the utility model are:

(1) The flue gas in the wet desulfurization absorption tower is washed by the slurry, and part of the dust will be removed, but at the same time, because the slurry is carried away by the flue gas, it will increase the amount of dust carried. The water washing deep dust removal device of the utility model is installed downstream of the wet desulfurization absorption tower, and performs deep dust removal treatment on the flue gas after wet desulfurization. On the one hand, it can continue to capture part of the dust, and on the other hand, it can dilute the dust-containing droplets. , Finally, the mist in the flue gas is captured by the water washing dedusting and mist eliminator, which can reduce the dust carrying amount in the flue gas and make the flue gas get advanced treatment. The utility model effectively solves the technical problem that the flue gas dust reaches the standard or even ultra-low emission, and realizes the clean emission of the flue gas.

(2) The utility model integrates the flue of the washing section and the circulating water pool, and sets the water washing dust removal circulation pump, the water washing dust removal demister flushing water pump and the absorption tower mist eliminator flushing water pump respectively connected with the circulating water pool. The flushing water can be circulated and supplied to the water washing spray layer, the water washing dedusting demister and the absorption tower demister respectively.

(3) The circulating water pool of the present utility model is also connected with a flushing water collection device of a water washing dedusting and mist eliminator and a process water replenishment interface, wherein the process water replenishment interface can be used to supplement the circulating water pool with process water to meet the sufficient water in the circulating pool; The flushing water collection device of the washing dust and mist eliminator is used to collect the water for flushing the washing dust and mist eliminator, and collect it into the circulating water pool, realizing the recycling of process water.

(4) The flue of the washing section of the utility model has a variety of design styles. Generally speaking, it can be an integral washing section flue. The flue of the washing section is divided into the first washing section flue and the second washing section flue by the circulating water pool. . The utility model can select different washing section flue design styles according to specific conditions, so that the manufacture and assembly of the utility model are more flexible, and can be applied to various working conditions.

(5) The water washing deep dust removal device of the utility model can determine whether to install a packing layer according to the actual dust removal requirements and the spray volume. The packing layer can form a water film to realize the function of water film dust removal and improve the dust removal effect.

(6) The water washing deep dust removal device of the present utility model is installed downstream of the wet desulfurization absorption tower, which will not affect the operation of the wet desulfurization system, and can achieve a certain effect of removing additional pollutants, such as sulfur dioxide, trioxide Sulfur has a certain removal effect.

(7) The water washing deep dust removal device of the present utility model can greatly save investment and land use, and has high flexibility in layout and installation.

Description of drawings

FIG. 1 is a schematic structural view of the deep water washing dust removal device described in Example 1.

Fig. 2 is a schematic structural view of the deep water washing dust removal device described in Example 2.

Fig. 3 is a schematic structural view of the deep water washing dust removal device described in Example 3.

Fig. 4 is a schematic structural view of the deep water washing dust removal device described in Example 4.

Explanation of reference numerals: 1. Washing section flue; 2. Circulating pool; 3. Washing spray layer; 4. Washing and dedusting circulation pump; 5. Washing water pump for washing dust and mist eliminator; ; 7. Washing dust and mist eliminator; 8. First flushing nozzle; 9. Second flushing nozzle; 10. Packing layer; 11. Washing water collection device for washing dust and mist eliminator; Water pipeline department; 14. First washing section flue; 15. Second washing section flue; 16. Absorption tower demister; 17. Wet desulfurization absorption tower; 18. Process water supplement interface.

Detailed ways

In order to facilitate the understanding of the purpose, technical solutions and beneficial effects of the utility model, the utility model will be further elaborated in combination with embodiments.

Example 1:

Thermal power plants and other enterprises need to reduce the dust content in the flue gas in order to meet the increasing flue gas emission standards. The usual method is to install a dust collector (electric dust collector or bag dust collector) in front of the induced draft fan or use wet desulfurization The downstream installation of wet electrostatic precipitator. The technical defect of the existing technology is that it is difficult to solve the technical problem of dust reaching the standard or even ultra-low emission, and the investment cost of the existing device or dust removal process is high, and the floor area is large. In view of the above problems, this embodiment designs a new type of water washing deep dust removal device, which is installed downstream of the demister of the wet desulfurization absorption tower, and the flue gas enters the flue 1 of the washing section from the entrance of the wet desulfurization absorption tower 17, Wash the flue gas by spraying water, absorb dust, dilute and absorb the solid content and salt content in the droplets at the outlet of the wet desulfurization absorption tower 17, and finally remove the mist droplets by washing the dust and mist eliminator 7, and clean the flue gas Discharge to the atmosphere through the chimney.

The structure of the deep washing dust removal device described in this embodiment is shown in Figure 1, mainly including the washing section flue 1, the circulating pool 2, the washing spray layer 3, the washing dust removal circulation pump 4, the washing dust removal mist eliminator flushing water pump 5 , Absorption tower mist eliminator flushing water pump 6, water washing dedusting mist eliminator 7, first flushing nozzle 8 and second flushing nozzle 9 and other equipment.

Wherein, the upstream of the washing section flue 1 is connected with the wet desulfurization absorption tower 17, specifically, the upstream of the washing section flue 1 is connected with the downstream of the absorption tower demister 16 inside the wet desulfurization absorption tower 17 . The flue 1 of the washing section communicates with the circulating water pool 2, and the circulating water pool 2 is arranged at the lower part of the flue 1 of the washing section. The water-washing spray layer 3 and the water-washing dedusting and demister 7 are arranged inside the flue 1 of the washing section, the water-washing spraying layer 3 is arranged above the circulating pool 2, and the water-washing dedusting and demister 7 is arranged at the bottom of the washing section flue 1 downstream.

The water washing and dedusting circulation pump 4 , the water washing and dedusting demister flushing water pump 5 , and the absorption tower demister demister flushing water pump 6 communicate with the circulating water pool 2 respectively. Wherein, the water-washing and dust-removing circulation pump 4 is connected to the water-washing spray layer 3 through a water delivery pipe, and can provide water for the water-washing spray layer 3 to spray the flue gas. The flushing water pump 5 of the washing, dedusting and mist eliminator is connected to the first flushing nozzle 8 through a water delivery pipe. The first flushing nozzle 8 is arranged inside the flue of the washing section. The flushing water pump 6 of the absorption tower demister is connected with the second flushing nozzle 9 through the water pipeline, and the second flushing nozzle 9 is arranged inside the wet desulfurization absorption tower 17, and the second flushing nozzle 9 is used for flushing the absorption tower demister 16. Specifically, the second flushing nozzle 9 is arranged below the demister 16 of the absorption tower.

As shown in FIG. 1 , the deep water washing dust removal device of this embodiment also includes a packing layer 10 and a washing water collection device 11 for water washing dust removal and mist eliminator. It should be noted that the setting of the packing layer 10 is not necessary. Whether to set the packing layer 10 can be determined according to the actual dust removal requirements and the spray volume. The packing layer 10 can form a water film, realize the function of water film dust removal, and improve the dust removal effect. Regarding the installation position of the packing layer 10 , the packing layer 10 is arranged inside the flue 1 of the washing section and above the circulating water tank 2 .

In order to realize the recycling of flushing water, the water-washing depth dust removal device of this embodiment is provided with a flushing water collection device 11 of a water-washing dust and mist eliminator. For ease of description, the flushing water collecting device 11 of the washing, dedusting and mist eliminator includes a connected flushing water collecting part 12 and a flushing water pipeline part 13, wherein the flushing water collecting part 12 is positioned under the washing, dedusting and mist eliminator, and the flushing water collecting part 12 is funnel-shaped in order to collect the flushing water as soon as possible; the lower part of the flushing water collection part 12 communicates with the flushing water pipeline part 13, and the flushing water pipeline part 13 communicates with the circulating pool 2 to collect the flushing water collected by the flushing water collection part 12 To the circulating pool 2.

In order to supplement the circulating water pool 2 with fresh process water and ensure that the circulating water pool 2 has enough process water, the water washing deep dust removal device of this embodiment also includes a process water replenishment interface 18 . As shown in FIG. 1 , the process water supply interface 18 communicates with the circulating water pool 2 and is arranged on one side of the upper part of the circulating water pool 2 .

It should be pointed out that the flue 1 of the washing section of the water-washing deep dust removal device of this embodiment is not designed as an integral flue, but is divided into the flue 14 of the first washing section and the flue 14 of the second washing section by the circulating water pool 2. 15, the flue 14 of the first washing section communicates with the flue 15 of the second washing section through the upper space of the circulating pool 2.

As shown in Figure 1, the packing layer 10 and the water washing spray layer 3 are all arranged inside the flue 14 of the first washing section, wherein the packing layer 10 is horizontally arranged between the water washing spray layer 3 and the circulating pool 2 The inside of the flue 14 of the first washing section. Both the first flushing spray head 8 and the water washing, dust and mist eliminator 7 are arranged inside the flue 15 of the second washing section, wherein the first flushing spray head 8 is arranged on the left side of the water washing, dust and mist eliminator 7 .

In order to minimize the droplet concentration at the flue gas outlet, the water washing dedusting and mist eliminator 7 can be arranged horizontally or vertically inside the flue 15 of the second washing section according to the actual situation. As shown in FIG. 1 , the water-washing, dust-removing and mist eliminator 7 is vertically arranged inside the flue 15 of the second washing section, and the first flushing nozzle 8 is arranged on the left side of the water-washing, dust-removing and mist-removing device 7 .

The deep water washing dedusting device described in this embodiment is installed downstream of the absorption tower demister 16 inside the wet desulfurization absorption tower 17 , wherein the second flushing nozzle 9 is arranged below the absorption tower demister 16 . The flue gas to be purified enters the wet desulfurization absorption tower 17 from the entrance of the wet desulfurization absorption tower, the flue gas is washed by the wet desulfurization spray layer, and after the mist is removed by the absorption tower demister The absorption tower 17 enters the washing section flue 1 of the downstream water washing depth dust removal device. Since the flue 1 of the washing section is divided into the flue 14 of the first washing section and the flue 15 of the second washing section by the circulating pool 2, the flue gas is first washed by the washing spray layer 3 arranged in the flue 14 of the first washing section, The water film dedusting is realized through the packing layer 10, and the washed water flows into the circulating pool 2 below the first washing section flue 14, and the flue gas output from the packing layer 10 enters the second washing section flue gas from the upper space of the circulating pool 2 Road 15, and finally remove the fog droplets through the water washing dedusting and demisting device 7, the flue gas after desulfurization and dust removal flows to the chimney, and the cleaned flue gas is discharged into the atmosphere.

It can be concluded from the above that the water washing deep dust removal device of this embodiment is installed downstream of the wet desulfurization absorption tower 17, and performs deep dust removal treatment on the flue gas after wet desulfurization. On the one hand, it can continue to capture part of the dust, and on the other hand, it can Dilute the dust-laden liquid droplets, and finally capture the mist droplets in the flue gas by washing the dust and mist eliminator 7, which can reduce the dust carrying amount in the flue gas and make the flue gas get advanced treatment. This embodiment realizes the recycling of process water, has a certain removal effect on sulfur dioxide and sulfur trioxide, and can greatly save investment and land use.

Example 2:

As shown in Figure 2, the water-washing depth dust removal device described in this embodiment is basically similar to Embodiment 1, and the main components are still the flue 1 of the washing section, the circulating pool 2, the water-washing spray layer 3, and the water-washing dust removal circulation pump 4. Washing water pump for dedusting and mist eliminator 5, water pump for washing demister and demister 6, water washing demister and demister 7, first rinsing nozzle 8 and second rinsing nozzle 9, etc. In addition, FIG. 2 shows that the deep water washing dust removal device described in this embodiment also includes a process water supply interface 18, a packing layer 10, and a washing water collection device 11 for water washing dust removal and mist eliminator.

The difference between this embodiment and the deep water washing dedusting device described in Embodiment 1 is that the flue 1 in the washing section is an integral flue. The circulating pool 2 and the flue 1 of the washing section are of an integrated design, that is, the circulating pool 2 communicates with the middle vertical section of the flue 1 of the washing section. The packing layer 10 is horizontally arranged inside the middle vertical section of the washing section flue 1 between the water washing spraying layer 3 and the circulating water pool 2 .

The water washing deep dust removal device of this embodiment is still installed downstream of the wet desulfurization absorption tower 17, the flue gas enters the flue 1 of the washing section from the wet desulfurization absorption tower 17, and the flue gas is first washed by the water washing spray layer 3, and then passed through the packing Layer 10 realizes water film dust removal, the flue gas passes through the space above the circulating pool 2, and finally the mist in the flue gas is captured by the water washing dust removal and mist eliminator 7, the flue gas after desulfurization and dust removal flows to the chimney, and the cleaned flue gas exhaust gas into the atmosphere.

This embodiment can achieve the beneficial effects described in Embodiment 1. Please refer to Embodiment 1 for the installation position relationship of the components of the deep water washing dust removal device described in this embodiment.

Example 3:

The water washing deep dust removal device described in this embodiment is another preferred solution of the present utility model, as shown in Figure 3, it mainly includes a washing section flue 1, a circulating pool 2, a water washing spray layer 3, and a water washing dust removal circulating pump 4 , Water washing dust and mist eliminator flushing water pump 5, absorption tower mist eliminator flushing water pump 6, water washing dust and mist eliminator 7, first flushing nozzle 8 and second flushing nozzle 9, etc. In addition, as shown in FIG. 3 , the deep water washing dedusting device described in this embodiment also includes a process water replenishment interface 18 , a packing layer 10 and a washing water collecting device 11 for water washing dedusting and mist eliminator.

The design of the washing section flue 1 of the water washing deep dust removal device described in this embodiment is the same as that of embodiment 1, that is, the washing section flue 1 is not an integral flue, but is separated by the circulating water pool 2 into the first A washing section flue 14 and a second washing section flue 15 , the first washing section flue 14 communicates with the second washing section flue 15 through the upper space of the circulating pool 2 . The difference from Example 1 is that both the packing layer 10 and the water washing spray layer 3 are arranged inside the flue 15 of the second washing section, wherein the packing layer 10 is horizontally arranged between the water washing spray layer 3 and the circulating water pool 2 The interior of the flue 15 between the second washing section.

The water washing deep dust removal device of this embodiment is still installed downstream of the wet desulfurization absorption tower 17, and the flue gas enters the flue 1 of the washing section from the wet desulfurization absorption tower 17. Since the flue 1 of the washing section is divided into first The flue 14 of the washing section and the flue 15 of the second washing section, the flue gas first enters the flue 14 of the first washing section, enters the flue 15 of the second washing section through the upper space inside the circulating pool 2, and first passes through the packing layer 10 to realize water Membrane dedusting, then washed by water washing and spraying layer 3, and finally the mist in the flue gas is captured by the water washing dedusting demister 7, the flue gas after desulfurization and dust removal flows to the chimney, and the cleaned flue gas is discharged into the atmosphere.

This embodiment can achieve the beneficial effects described in Embodiment 1. Please refer to Embodiment 1 for the installation position relationship of the components of the deep water washing dust removal device described in this embodiment.

Example 4:

The water washing deep dust removal device described in this embodiment is another preferred solution of the present utility model, as shown in Figure 4, it mainly includes a washing section flue 1, a circulating pool 2, a water washing spray layer 3, and a water washing dust removal circulating pump 4 , Water washing dust and mist eliminator flushing water pump 5, absorption tower mist eliminator flushing water pump 6, water washing dust and mist eliminator 7, first flushing nozzle 8 and second flushing nozzle 9, etc. In addition, as shown in FIG. 4 , the deep water washing dust removal device described in this embodiment also includes a process water supply interface 18 , a packing layer 10 and a washing water collection device 11 for water washing dust removal and mist eliminator.

This embodiment has the same feature as the water washing deep dust removal device described in Embodiment 2, that is, the flue 1 of the washing section is an integral flue. The middle part and the downstream part of the flue 1 of the washing section are integrated and arranged in a horizontal direction, and the circulating pool 2 is located in the middle of the flue 1 of the washing section and below the flue 1 of the washing section. The packing layer 10 is vertically arranged inside the flue 1 of the washing section on the upper right, and the packing layer 10 is located inside the flue 1 of the washing section between the water washing spray layer 3 and the first flushing nozzle 8 . The water washing spray layer 3 is arranged in the upper space of the circulating pool 2 .

The water washing deep dust removal device of this embodiment is still installed downstream of the wet desulfurization absorption tower 17, the flue gas enters the flue 1 of the washing section from the wet desulfurization absorption tower 17, and the flue gas is first washed by the water washing spray layer 3, and the flue gas is in The upper space of the circulating pool 2 passes through, and then the water film dust removal is realized through the packing layer 10, and finally the mist in the flue gas is captured by the water washing dust removal and mist eliminator 7, and the flue gas after desulfurization and dust removal flows to the chimney, and the cleaned flue gas exhaust gas into the atmosphere.

This embodiment can achieve the beneficial effects described in Embodiment 1. Please refer to Embodiment 1 for the installation position relationship of the components of the deep water washing dust removal device described in this embodiment.

The utility model has been further described above in conjunction with the embodiments, but the utility model is not limited to the above-mentioned embodiment, within the scope of knowledge possessed by those of ordinary skill in the art, it can also be used without departing from the purpose of the utility model. Make various changes.

Claims (9)

1. A water washing deep dust removal device, characterized in that it includes a washing section flue, a circulating pool, a water washing spray layer, a water washing dust removal circulation pump, a water washing dust removal demister flushing water pump, an absorption tower mist eliminator flushing water pump, a water washing dust removal demister, first flushing nozzle and second flushing nozzle; The upstream of the flue in the washing section is connected with the wet desulfurization absorption tower; the flue in the washing section is connected with the circulating water pool, and the circulating water pool is arranged at the lower part of the flue in the washing section; Inside the flue of the washing section, the washing spray layer is set above the circulating pool, and the washing dust and mist eliminator is set downstream of the flue of the washing section; The washing and dedusting circulating pump, the washing and dedusting demister flushing water pump, and the absorbing tower demister and demister washing pump are respectively connected with the circulating water pool, wherein the water washing and dedusting circulating pump is connected with the washing and spraying layer through the water pipeline, and the water washing and dedusting and demistering The fogger flushing pump is connected to the first flushing nozzle through the water pipeline, and the absorption tower demister flushing pump is connected to the second flushing nozzle through the water pipeline; The first flushing nozzle is arranged inside the flue of the washing section, and is adjacent to the water washing dedusting demister; the second flushing nozzle is arranged inside the wet desulfurization absorption tower, and is connected to the wet desulfurization absorption tower demister. adjacent. 2. The water washing deep dust removal device according to claim 1, characterized in that it also includes a packing layer and a washing water collection device for washing dust and mist eliminators; the packing layer is arranged inside the flue of the washing section and is located in the circulating pool above; the flushing water collecting device of the washing dust and mist eliminator includes a flushing water collection part and a flushing water pipeline part, the flushing water collection part is located below the washing dust and mist eliminator, and the flushing water collection part passes through the flushing water pipe part and the circulating pool connected. 3. The water washing deep dust removal device according to claim 1 or 2, characterized in that it also includes a process water replenishment interface, and the process water replenishment interface communicates with the circulating water pool for replenishing the circulating water pool with process water. 4. The water washing deep dust removal device according to claim 2, characterized in that, the flue of the washing section is an integral flue, or is separated by a circulating water pool into a flue of the first washing section and a flue of the second washing section The flue of the first washing section communicates with the flue of the second washing section through the inner space of the circulating pool. 5. The water-washing deep dust removal device according to claim 4, wherein the flue of the washing section is an integral flue, the circulating pool communicates with the middle vertical section of the flue of the washing section, and the packing layer is horizontal It is arranged inside the middle vertical section of the flue of the washing section between the water washing spray layer and the circulating water pool; or the circulating water pool is connected with the middle horizontal section of the flue of the washing section, and the packing layer is vertically arranged in the washing section at the upper right obliquely. The inside of the section flue, and the packing layer is between the water washing spray layer and the first flushing spray head. 6. The water washing deep dust removal device according to claim 4, characterized in that, the flue of the washing section is divided into the flue of the first washing section and the flue of the second washing section by the circulating water pool, and the packing layer and the washing spray The shower layer is arranged inside the flue of the first washing section, and the packing layer is arranged horizontally between the washing spray layer and the circulating pool; or the packing layer and the washing spray layer are both arranged inside the flue of the second washing section , the packing layer is arranged horizontally between the water washing spray layer and the circulating water pool. 7. The deep water washing dedusting device according to claim 3, characterized in that the water washing dedusting and mist eliminator is arranged horizontally or vertically downstream of the flue in the washing section. 8. The deep water washing dedusting device according to claim 7, characterized in that the water washing dedusting demister is horizontally arranged downstream of the flue of the washing section, and the first flushing nozzle is arranged under the water washing dedusting demister. 9. The water washing deep dedusting device according to claim 7, characterized in that, the water washing dedusting and mist eliminator is vertically arranged downstream of the flue of the washing section, and the first flushing nozzle is arranged on the left side of the water washing dedusting and mist eliminator.