CN209997379U

CN209997379U - haze-reducing and white-eliminating tower for smoke

Info

Publication number: CN209997379U
Application number: CN201822195272.8U
Authority: CN
Inventors: 刘明; 刘森
Original assignee: Shandong Normal University
Current assignee: Shandong Normal University
Priority date: 2018-12-26
Filing date: 2018-12-26
Publication date: 2020-01-31
Anticipated expiration: 2028-12-26

Abstract

The utility model discloses an flue gas subtracts haze, "white" tower disappears, including tower shell and inside subassembly, its characterized in that, tower shell inner chamber from bottom to top be water storage area in proper order, desulfurization flue gas inlet zone, washing district, defogging district and heat transfer zone, and each district space intercommunication has arranged the scrubber in the washing district, has arranged the defroster in the defogging district, arranges in the zone of heating and has established heat exchanger tube bank, and former flue gas passes through the desulfurization flue gas that heat exchanger tube bank heating washing purified, and final desulfurization flue gas is accomplished and is removed the haze and "white" disappears, can realize clean emission.

Description

haze-reducing and white-eliminating tower for smoke

Technical Field

The invention relates to the technical field of flue gas purification equipment, in particular to flue gas haze reducing and white eliminating towers.

Background

The existing flue gas desulfurization method mainly comprises a wet desulfurization method and a dry desulfurization method, wherein the wet desulfurization method mainly comprises a limestone-gypsum method, the technology of the method is mature, the method is adopted by most of the existing flue gas desulfurization processes, the desulfurization efficiency of the method is ideal, negative phenomena can be brought when the method is applied to desulfurization, namely, a large amount of desulfurizer and desulfurization products can be carried in the flue gas after desulfurization.

Disclosure of Invention

In order to solve the problem of entrainment of flue gas of a desulfurizing agent and a desulfurization product in a wet desulfurization process and the problem of a large amount of generated white smoke, the invention provides novel haze-reducing and white-eliminating tower devices.

The invention is realized by the following technical scheme:

A haze-reducing and white-eliminating tower for flue gas comprises a tower shell and internal components, and is characterized in that a water storage area, a desulfurized flue gas inlet area, a washing area, a demisting area and a heat exchange area are sequentially arranged in the inner cavity of the tower shell from bottom to top, the water storage area is provided with a water replenishing opening and a water outlet, the desulfurized flue gas inlet area is provided with a desulfurized flue gas inlet, a washer is arranged in the washing area and connected with a washing water inlet pipe outside the tower shell, a demister is arranged in the demisting area, a heat exchange tube bundle is arranged in the heating area, the top of the tower shell is provided with a purified flue gas outlet, heat exchange tubes are transversely arranged and fixed through a tube plate a and a tube plate b, the outer sides of the tube plates a and b are connected with the tube box a and the tube box, a tube pass is formed by communicating the tube box cavity, the heat exchange area is sealed by the tower shell, and the tube box a and the tube box are respectively provided with an original flue gas.

Preferably, a cyclone plate is arranged at the air inlet end of each heat exchange tube.

The related nouns mean:

1. and (3) wet desulphurization: the method is characterized in that flue gas to be desulfurized is contacted with a desulfurization solution, and the aim of desulfurization is achieved through mass transfer and reaction between gas and liquid. The current wet desulphurization method is a limestone/gypsum method; the desulfurizing agent in the limestone/gypsum method is limestone, the limestone is crushed and then mixed with water to form slurry, the slurry is contacted with flue gas, sulfur in the flue gas is converted into gypsum, and therefore desulfurization is completed.

2. The GGH heater is an gas-gas heat exchanger, can transfer the heat of original flue gas to desulfurized flue gas, and has the functions of heating the desulfurized clean flue gas by using the original flue gas to ensure that the temperature of the flue gas reaches above the dew point, reducing the corrosion to an inlet flue and a chimney, improving the diffusion degree of pollutants, reducing the temperature of the flue gas entering an absorption tower and reducing the technical requirements on corrosion prevention in the tower.

3. MGGH heat exchanger is also kinds of gas-gas heat exchangers, and is different from GGH, the heat transfer body of GGH is the heat transfer element of GGH, and the heat transfer body is contacted with flue gas in different flues to finish heat transfer, and the heat transfer body of MGGH is heat transfer medium (such as water) and finishes heat transfer by the flow of the heat transfer body.

4. A washer: the part for washing the flue gas with water can accomplish the function that water and flue gas mix to reach the purpose of washing flue gas. The common methods are as follows: in the spraying mode, a nozzle of a sprayer sprays water to be contacted with the flue gas for absorption, and the sprayer is called a washer; the flue gas is contacted and absorbed with water on the tower tray, and the tower tray is called a scrubber at the moment; similarly, this is true.

The invention has the beneficial effects that:

1. the structure is compact, and the procedures of purifying the flue gas (removing entrained desulfurizer and desulfurization products and other dust) and eliminating 'white smoke' can be finished in towers;

2. the GGH heater is omitted, and the raw flue gas is used for directly heating the desulfurized flue gas, so that the cost is reduced.

3. The flue gas is deeply purified, so that the flue gas is discharged cleanly.

Drawings

FIG. 1 is a block diagram of a haze reducing and whitening flue gas tower;

FIG. 2 is a flow chart of a haze reduction and whitening reduction tower for flue gas;

FIG. 3 is a block diagram of a cyclone plate;

fig. 4 is a top view of fig. 3.

Detailed Description

Example

The invention is described below with reference to fig. 1 and 2:

1. A haze-reducing and 'white-eliminating' flue gas tower comprises a tower shell 1 and internal components, wherein the cross section of the tower body is square, a water storage area 2, a desulfurized flue gas inlet area 3, a washing area 4, a demisting area 5 and a heat exchange area 6 are sequentially arranged in the inner cavity of the tower shell 1 from bottom to top, the water storage area 2 is provided with a water supplementing opening and a water outlet, the desulfurized flue gas inlet area 3 is provided with a desulfurized flue gas inlet, the washing area 4 is internally provided with a washer 8, the washer 8 is connected with a washing water inlet pipe outside the tower shell 1, the washing area 4 is an area for purifying and washing the desulfurized flue gas, the washing mode is water washing, desulfurizing agents and desulfurization products carried in the flue gas are removed through the water washing, other dust in the flue gas can be washed in step, a water spray nozzle is adopted for washing the flue gas in the embodiment, a demister 9 is arranged in the fog area 5, a region for reducing the moisture content in the flue gas, a general desulfurizing tower 9 is arranged in a heating area, a heat exchange tube 10 bundle is arranged in the heating area, a heat exchange tube 1 is arranged on the top of the tower shell, a heat exchange tube 16 a is transversely connected with a heat exchange tube box 16 a, and a heat exchange tube box 16 a heat exchange tube box is arranged on the top of the heat exchange tube box, and connected with a heat exchange tube.

The working principle of the smoke haze reducing and white eliminating tower is as follows: after electrostatic dust collection, raw flue gas from a boiler firstly enters a pipe box a14 from a raw flue gas inlet 16, uniformly enters an inner cavity of a heat exchange pipe 10 bundle in the pipe box a14, heats the wall of the heat exchange pipe 10, then flows out to a pipe box b15, and then flows out from a raw flue gas outlet 17. The cooled raw flue gas is guided by a pipeline and then enters a desulfurization system for wet desulfurization, the desulfurized flue gas becomes desulfurized flue gas, the desulfurized flue gas enters a desulfurized flue gas inlet 7, enters a desulfurized flue gas inlet area 3 of a flue gas haze reduction and white elimination tower, rises and enters a washing area 4, a washer 8 sprays water mist downwards in the washing area 4, the flue gas meets the water mist, water washes away a desulfurizer, desulfurization products and other dust in the flue gas, and the desulfurized flue gas becomes purified flue gas at the moment; the purified flue gas continuously rises and enters a demister 9 arranged in the demisting zone 5, and most of water mist carried in the flue gas is removed by the demister 9; the purified flue gas continuously rises and enters the heat exchange area 6, the heat exchange tube 10 emits heat in the heat exchange area 6, the purified flue gas absorbs heat, the temperature of the purified flue gas rises, the moisture unsaturation degree rises along with the temperature of the purified flue gas, and finally the purified flue gas is discharged through the purified flue gas outlet 11 to reduce haze and eliminate white tower.

When the flue gas flows through the flue gas haze reduction tower and the white eliminating tower, a washing water operation system is also provided:

(see figure 2), the washing water is delivered to the washer 8 in the washing area 4 by the pump, and is sprayed out in a mist form from the spray nozzle to meet the ascending desulfurization flue gas, the water mist washes the desulfurizer, desulfurization products and other dust carried in the flue gas down to fall into the water storage area 2 at the bottom of the tower shell 1, and the water in the water storage area 2 is purified and then is delivered to the washer 8 by the pump, so that the circular washing is completed.

Example two

The present invention is explained below with reference to fig. 1, 2, 3 and 4:

on the basis of the embodiment , the heat exchange pipe opening is provided with the cyclone plate, the cyclone plate consists of an outer ring, an inner ring and a plurality of cyclone sheets, the cyclone sheets are rectangular and are uniformly fixed between the outer ring and the inner ring, and the cyclone sheets and the axis of the cyclone plate deviate from at an angle β.

Claims

The tower comprises a tower shell and internal components, and is characterized in that a water storage area, a desulfurized flue gas inlet area, a washing area, a demisting area and a heat exchange area are sequentially arranged in an inner cavity of the tower shell from bottom to top, the water storage area, the desulfurized flue gas inlet area, the washing device and a washing water inlet pipe outside the tower shell are communicated, a demister is arranged in the demisting area, a heat exchange pipe bundle is arranged in the heating area, a purified flue gas outlet is formed in the top of the tower shell, heat exchange pipes are transversely arranged and fixed through pipe plates a and b, the outer sides of the pipe plates a and b are connected with the pipe box a and the pipe box b, the heat exchange pipe cavities are communicated with the pipe box cavity to form a pipe pass, the heat exchange area is sealed by the shell tower to form a shell pass pipe box, and the raw flue gas inlet and the raw flue gas outlet are formed in the raw gas inlet and the raw gas outlet.
2. The flue gas haze reduction, white elimination tower of claim 1, wherein a cyclone plate is disposed at the inlet end of each heat exchange tube.