CN212974706U

CN212974706U - Modular horizontal desulfurization equipment system

Info

Publication number: CN212974706U
Application number: CN202021607049.0U
Authority: CN
Inventors: 张爱丰; 龚磊; 章小婷; 魏虎
Original assignee: DEMISTER (SHANGHAI) ENVIRONMENTAL TECHNOLOGY CO LTD
Current assignee: DEMISTER (SHANGHAI) ENVIRONMENTAL TECHNOLOGY CO LTD
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2021-04-16
Anticipated expiration: 2030-08-05

Abstract

The utility model discloses a modular horizontal desulfurization equipment system, which comprises at least two sets of horizontal desulfurization equipment, wherein the height of each set of horizontal desulfurization equipment is 2-3m, the length is 7-8.5m, and the width is 2-3.5 m; and at least two sets of horizontal desulfurization equipment are connected in parallel at the flue gas inlet.

Description

Modular horizontal desulfurization equipment system

Technical Field

The utility model relates to a flue gas desulfurization equipment field especially relates to a horizontal sweetener system of modularization suitable for brickkiln.

Background

The brick kiln can generate sulfur-containing flue gas in the brick burning process. In order to meet the requirement of environmental protection, sulfur dioxide in the flue gas needs to be removed by flue gas desulfurization equipment before the flue gas is discharged. At present, the desulfurization equipment suitable for the brick kiln mainly takes a vertical desulfurization tower as a main part, the equipment is huge, and the vertical desulfurization tower needs to be built by field engineering. Therefore, the construction cost is high, the investment of users is huge, the occupied space is large, the maintenance is not easy, and the large capital pressure is caused to the users. Patent CN102179148B has adopted horizontal desulfurization reactor, but the flue gas gets into in the desulfurization reaction chamber and meets with alkali lye vertical cross and carry out desulfurization reaction, and this process can't make the gas-liquid fully contact, and desulfurization effect is not good. The horizontal desulfurizing tower in patent 201912887U is bulky and is not favorable for transportation.

Therefore, the technical personnel in the field are dedicated to develop a horizontal desulfurization device which is convenient to transport and saves the manufacturing cost, and is suitable for the flue gas desulfurization, dedusting and demisting of the brick kiln.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is how to make a standardized, modular, and easily transportable horizontal flue gas desulfurization apparatus.

In order to achieve the above object, the present invention provides in a first aspect a modular horizontal desulfurization apparatus system, comprising at least two sets of horizontal desulfurization apparatuses, each set of horizontal desulfurization apparatus having a height of 2-3m, a length of 7-8.5m, and a width of 2-3.5 m; and at least two sets of horizontal desulfurization equipment are connected in parallel.

Further, the number of sets of horizontal desulfurization equipment is determined according to the flow rate of flue gas to be treated.

Further, horizontal sweetener includes digester, thick liquid pond, sedimentation tank and draught fan, and the thick liquid pond is connected with the digester integral type to the thick liquid pond is located the below of digester, and the sedimentation tank is outside the digester, and the sedimentation tank is linked together with the thick liquid pond, and the draught fan is located outside the digester, and the draught fan is established at the outlet flue of the inlet flue of digester or digester.

Further, the digester includes that multistage sprays layer, dust remover and defroster, and multistage spraying layer, dust remover and defroster are located the digester, sprays the layer and establishes the inlet flue at the digester, and the defroster is established at the outlet flue of digester, and the dust remover is arranged and is sprayed the centre on layer or spray between layer and the defroster multistage.

Furthermore, the interval between the multi-stage spraying layers is 0.5-1.0m, the spraying layers comprise a spraying main pipe and a plurality of nozzles, the nozzles are arranged on the spraying main pipe, the included angle between each nozzle and the spraying main pipe is a right angle, and the number of the nozzles is at least 10.

Further, the desulfurizing tank also comprises a condenser, a heat exchanger and a cooling system, the condenser is positioned between the dust remover and the demister, the heat exchanger and the cooling system are positioned outside the desulfurizing tank, the heat exchanger is communicated with one end of the condenser, the heat exchanger and the condensed water pass through the condenser and perform heat exchange with the flue gas, the condensed water absorbing heat flows through the heat exchanger and performs heat exchange with the outside air and then flows into the cooling system, and the cooled condensed water flows into the condenser through the cooling system.

Further, the slurry tank includes a pH meter and a level meter, the pH meter is configured such that when the pH of the slurry is not less than 8, the slurry pump is activated and the slurry pump pumps a quantitative amount of the slurry from the level meter into the settling tank.

Further, the sedimentation tank comprises a bin and a stirrer, the stirrer is positioned at the bottom of the sedimentation tank, and the bin is positioned at the upper part of the stirrer.

The utility model provides a second aspect of a method for rapidly building a modularized horizontal desulfurization device system on site, which comprises the following steps:

(1) prefabricating a plurality of sets of horizontal desulfurization equipment with the height of 2-3m, the length of 7-8.5m and the width of 2-3.5 m;

(2) determining the number of sets of required horizontal desulfurization equipment according to the flow of the flue gas to be treated;

(3) conveying each set of horizontal desulfurization equipment to a desulfurization site through a highway after the whole set of horizontal desulfurization equipment is loaded;

(4) and on the desulfurization site, the horizontal desulfurization equipment is connected with the flue gas inlet in a parallel connection mode.

Furthermore, the horizontal desulfurization equipment comprises a desulfurization tank, a slurry pool, a sedimentation tank and an induced draft fan, wherein the slurry pool is integrally connected with the desulfurization tank, the slurry pool is positioned below the desulfurization tank, the sedimentation tank is positioned outside the desulfurization tank, the sedimentation tank is communicated with the slurry pool, the induced draft fan is positioned outside the desulfurization tank, and the induced draft fan is arranged at a smoke inlet of the desulfurization tank or a smoke outlet of the desulfurization tank; the desulfurization tank comprises a multi-stage spraying layer, a dust remover and a demister, the multi-stage spraying layer, the dust remover and the demister are positioned in the desulfurization tank, the spraying layer is arranged at a smoke inlet of the desulfurization tank, the demister is arranged at a smoke outlet of the desulfurization tank, and the dust remover is arranged in the middle of the multi-stage spraying layer or between the spraying layer and the demister; the desulfurizing tank also comprises a condenser, a heat exchanger and a cooling system, the condenser is positioned between the dust remover and the demister, the heat exchanger and the cooling system are positioned outside the desulfurizing tank, the heat exchanger is communicated with one end of the condenser, the heat exchanger and condensed water pass through the condenser and perform heat exchange with flue gas, the condensed water absorbing heat flows through the heat exchanger and performs heat exchange with outside air and then flows into the cooling system, and the cooled condensed water flows into the condenser through the cooling system.

Technical effects

Each set of horizontal desulfurization equipment of the utility model is prefabricated before leaving factory, no field engineering is needed, and a plurality of sets of horizontal desulfurization equipment which need to be connected in parallel can be determined on the field according to the flow of flue gas;

each set of horizontal desulfurization equipment adopts a modular and standardized design, so that the cost caused by customization is reduced, and the equipment is small in size and convenient for the whole set of transportation of trucks on roads;

the horizontal desulfurization equipment has the characteristics of simple structure, small resistance, difficult blockage of the tower body, convenient maintenance, high desulfurization efficiency and the like;

the utility model achieves the purpose of saving water resources through double circulation systems, namely a slurry circulation system and a spraying main pipe liquid circulation system;

the utility model discloses a comdenstion water circulation system cools down the flue gas, has played the effect of dust removal defogging to the flue gas.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Drawings

FIG. 1 is a diagram of a plurality of horizontal desulfurization units according to a preferred embodiment of the present invention in parallel;

FIG. 2 is a schematic diagram of a single standardized horizontal desulfurization apparatus according to a preferred embodiment of the present invention;

FIG. 3 is a perspective view of a single modular horizontal desulfurization unit in accordance with a preferred embodiment of the present invention;

FIG. 4 is a system diagram of a single standardized horizontal desulfurization unit in accordance with a preferred embodiment of the present invention;

fig. 5 is a plan view of the first bottom plate in the desulfurization tank in accordance with a preferred embodiment of the present invention.

Detailed Description

The technical contents of the preferred embodiments of the present invention will be more clearly understood and appreciated by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments, and the scope of the invention is not limited to the embodiments described herein.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.

The height of the single horizontal desulfurization device of the utility model is 2-3m, the length is 7-8.5m, and the width is 2-3.5 m. In this embodiment, the horizontal desulfurization apparatus has a length x, a width x, and a height: 8m x 3m x 2.7.7 m. The horizontal desulfurization equipment under the volume is convenient to transport. As shown in fig. 1, in this embodiment 100, 4 to 6 sets of horizontal desulfurization devices are used, and the number of devices connected in parallel can be determined on site according to the flue gas flow rate. The desulfurizing and dust-removing equipment is designed according to a proper liquid-gas ratio, carbon steel is used as a framework material, and glass flakes in the tower are used for corrosion prevention. The whole set of the desulfurization device has the integral resistance of about 1100 Pa.

As shown in fig. 2 to 5, the single-set horizontal desulfurization apparatus 10 of the present embodiment includes a desulfurization tank 1, a slurry tank 2, a settling tank 3, and a fan. The slurry tank 2 is disposed below the desulfurization tank 1. The slurry pool 2 is connected with the desulfurizing tank 1 in an integrated manner. The first floor 11 of the digester 1 serves as the top of the slurry tank 2. The first bottom plate 11 is provided with slurry outlets 12 arranged in a staggered manner. Each slurry outlet 12 is sleeved with a short pipe 13, and the short pipe 13 extends to the position below the liquid level of the slurry pool 2. When the devulcanizer 1 is in negative pressure operation, the short pipe 13 can automatically form a water seal to avoid the inflow of outside air and discharge the redundant liquid. The sedimentation tank 3 and the slurry tank 2 form a supernatant liquid circulating system through a slurry pump 4 and a supernatant liquid overflow pump 5. The fan is located at the clean flue gas outlet of the devulcanizer 1. The effect of fan is the flow direction of guide flue gas, and then makes the interior negative pressure that forms of digester 1. In other embodiments, the blower is located at the inlet of the devulcanizer. The sedimentation tank is arranged outside the desulfurizing tank and is connected with the slurry tank.

A spraying main pipe 14, a dust remover, a demister 16 and a condenser 17 are arranged in the desulfurizing tank 1. In this embodiment, the desulfurizing tank is provided with three layers of spraying main pipes 14, two layers of dust collectors, one layer of demister 16 and two layers of condensers 17. The first dust collector 151 is disposed between the second spray header and the third spray header. The second dust separator 152 is disposed between the third spray header and the mist eliminator 16. The spraying main pipe 14 and the dust remover are arranged at intervals, so that the dust removal rate can be improved. In other embodiments, the shower header 14 and the duster may not be spaced apart. In order to improve the dust removal rate, the number of the dust collectors can be increased according to actual requirements. The spraying liquid used for the spraying main pipe 14 comes from the slurry tank 2. A spray liquid circulating system is formed between the desulfurizing tank 1 and the slurry pool 2 through a spray pump 6. The nozzle on the spraying main pipe adopts a silicon carbide spiral nozzle. The spraying pipeline adopts FRP fiber reinforced plastic pipeline. Each layer is provided with 20 nozzles, and the spraying angle is 90 degrees. The arrangement mode of the nozzles is uniform. The spraying layer interval is 0.8m, and the spraying layers are arranged in a staggered manner, so that mutual interference among the spraying layers is avoided, uniform distribution of liquid drops is ensured, the gas-liquid contact condition is improved, and the desulfurization efficiency is improved.

Wherein, the dust remover is a plate dust remover. The plate dust collector comprises a multi-stage corrugated plate assembly, and the corrugated plate assembly comprises a plurality of corrugated plates which are arranged in parallel. The demister is one or more of a tubular demister, a roof demister, a horizontal airflow demister, a V-shaped demister and a superfine demister. The specific structure of the demister can be referred to patent CN 201520058549.6.

When the desulfurization system operates normally, the flue gas enters from the flue gas inlet of the equipment. The flue gas uniform distributor is arranged at the flue gas inlet, so that the retention time and the uniform distribution of the flue gas are ensured, and the cyclone and the wall effect of the flue gas are effectively avoided. The absorption liquid is pumped into the spraying main pipe by a pump and is uniformly sprayed out from the right part of the equipment through a nozzle. At this time, the sprayed absorption liquid is fully contacted with the flue gas flowing leftwards, and the alkali liquor droplets and the liquid mist are in contact with SO in the flue gas₂And the sodium sulfite is generated through reaction after violent collision occurs, and the sodium salt liquid flows to the bottom of the tower body and continues to be circularly absorbed.

Two layers of condensers 17 are arranged between the second dust remover 152 and the demister 16. In this embodiment, the demister 16 is a hyperfine demister. A plurality of demister rotors are mounted on the demister 16, and the demister rotors can remove mist droplets from the demister. The dehumidifying rotor is provided with a brush, and the dehumidifying rotor is rotatable. The dehumidification rotor has the function of automatic monitoring humidity, and when humidity on the defroster reached the default, the dehumidification rotor rotated in order to reach the effect of defogging. The part of the demister 16 close to the flue gas outlet is also provided with a heating component which heats the flue gas, thereby achieving the aim of eliminating the white smoke plume.

A condenser 17 is arranged at the clean flue gas outlet in order to reduce the water content of the flue gas. The condenser 17 forms a condensed water circulation system with the heat exchanger 7 and the condensed water tank 8 disposed outside the desulfurization tank 1. In the desulfurizing tank 1, the flue gas passing through the condenser 17 and the condensed water in the condenser 17 perform heat exchange, and the condensed water absorbs the heat of the flue gas to heat up, and then the flue gas is cooled. The heated condensate water flows into the heat exchanger outside the devulcanizer 1. At this time, the heated condensed water exchanges heat with the cold air outside the heat exchanger. Further, the condensed water after heat exchange enters a condensed water tank 8. The condensed water flowing out of the condensed water tank is introduced into the condenser 17 in the desulfurizing tank 1 through a pipe, and is circulated. Wherein, a ball float valve is arranged in the condensed water tank to control water supplement. The specific structure of the condenser is described in patent CN 201910063069.1.

When the wet flue gas leaving the second dust remover 152 passes through the condenser, the temperature of the flue gas is reduced to separate out a large amount of water vapor, the generated water vapor automatically searches for residual micro fog drops and micro dust in the flue gas as condensation nuclei, the micro fog drops and the micro dust adsorb a large amount of water vapor and grow up, the friction force between the fog drops and the flue gas is reduced by larger centrifugal force, and the water vapor flows in the curved flow channel to form larger centrifugal force so as to impact on the blades.

The smoke inlet of the desulfurizing tank is provided with a drainage plate, the drainage plate has a concave structure with high middle and low periphery, and the structure can prolong the contact time of the flue gas and the plate, thereby playing a role in reducing the speed of the flue gas flow and further increasing the contact time with the spraying liquid.

And a second bottom plate 18 of the desulfurizing tank 1 is provided with a ponding drain 19, and ponding is discharged from the ponding drain 19 and flows to the slurry tank through a pipeline.

The slurry tank 2 collects and holds the slurry from the desulfurization tank 1. A pH meter and a liquid level meter are arranged in the slurry pool 2. When the pH is 8 or more, the slurry pump 4 is started. The slurry pump 4 draws 2/3 the slurry into the settling tank 3. The motor is started and the bin above the sedimentation tank 3 is opened. The medicine in the bin falls into the sedimentation tank 3, and simultaneously, stirring is started. The medicine in the storage bin is sodium hydroxide and quicklime. And after the motor stops, allowing the motor to settle in the settling pond for 40-60 min. Preferably, the precipitation is carried out for 45 min. After the precipitation is carried out for 45min, the overflow pump 5 of the supernatant is started, and the supernatant automatically flows back to the slurry pool 2. And after the supernatant in the sedimentation tank 3 overflows, or after the motor stops for 65min, opening an electric valve at a slag discharge port of the sedimentation tank 3 to discharge waste water and waste slag. When the slurry pump 4 is started for 100min and the liquid level on the liquid level meter of the slurry pool 2 is smaller than 0.3m, the water replenishing valve on the slurry pool 2 starts to replenish water until the liquid level is larger than 0.5m, and the water replenishing valve is closed. Wherein sodium hydroxide and quicklime are added into the stock bin through an automatic dosing system, the pH value of the slurry is maintained within the range of 6-7, and the pH value optimizes SO₂The removal efficiency of (1).

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the teachings of this invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. A modular horizontal desulfurization equipment system is characterized by comprising at least two sets of horizontal desulfurization equipment, wherein the height of each set of horizontal desulfurization equipment is 2-3m, the length of each set of horizontal desulfurization equipment is 7-8.5m, and the width of each set of horizontal desulfurization equipment is 2-3.5 m; the at least two sets of horizontal desulfurization equipment are connected in parallel; wherein, horizontal sweetener include digester, thick liquid pond, sedimentation tank and draught fan, the thick liquid pond with the digester integral type is connected, and the thick liquid pond is located the below of digester, the sedimentation tank is in outside the digester, the sedimentation tank with the thick liquid pond is linked together, the draught fan is located outside the digester, the draught fan is established the inlet flue of digester perhaps the outlet flue of digester.

2. The modular horizontal desulfurization apparatus system according to claim 1, wherein said desulfurization tank comprises a plurality of stages of spraying layers, dust collectors and demisters, said plurality of stages of spraying layers, dust collectors and demisters being located within said desulfurization tank, said spraying layers being provided at a flue gas inlet of said desulfurization tank, said demisters being provided at a flue gas outlet of said desulfurization tank, said dust collectors being disposed in the middle of said plurality of stages of spraying layers or between said spraying layers and said demisters.

3. The modular horizontal desulfurization apparatus system according to claim 2, wherein the spacing between the multi-stage spray levels is 0.5 to 1.0m, the spray levels comprise a spray header and a plurality of nozzles, the nozzles are arranged on the spray header, the included angle between the nozzles and the spray header is a right angle, and the number of the nozzles is at least 10.

4. The modular horizontal desulfurization apparatus system of claim 3, wherein the desulfurization tank further comprises a condenser, a heat exchanger and a cooling system, the condenser is located between the dust remover and the demister, the heat exchanger and the cooling system are located outside the desulfurization tank, the heat exchanger is communicated with one end of the condenser, the heat exchanger is in heat exchange with the condensed water passing through the condenser and the flue gas, the condensed water absorbing heat flows into the cooling system after passing through the heat exchanger and being in heat exchange with the outside air, and the cooled condensed water flows into the condenser through the cooling system.

5. The modular horizontal desulfurization apparatus system of claim 4, wherein said slurry tank comprises a pH meter and a level meter, said pH meter being configured such that when the pH of the slurry is not less than 8, a slurry pump is activated, said slurry pump pumping a slurry amount dosed by said level meter into said settling tank.

6. The modular horizontal desulfurization apparatus system of claim 5, wherein said settling tank comprises a bin and an agitator, said agitator being located at the bottom of said settling tank, said bin being located at the upper portion of said agitator.