CN2242121Y

CN2242121Y - Double-cylinder wet type dust removing device

Info

Publication number: CN2242121Y
Application number: CN 95224667
Authority: CN
Inventors: 高元松
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-11-15
Filing date: 1995-11-15
Publication date: 1996-12-11
Anticipated expiration: 2005-11-15

Abstract

The utility model discloses a double-cylinder wet type dust removing device, which is matched with wet type dust removing appliances in industrial boilers. The double-cylinder wet type dust removing device is mainly composed of an inner dust removing chamber with a guide plate, an exterior dust removing chamber, a core stand tube, a circular collecting system and a dust discharge drain system with a dust rushing pipe. Dust gases is exhausted out from the utility model through three stages dust removing. Compared with existing dust removing devices, the double-cylinder wet type dust removing device has the advantages that dust removing efficiency is high and a dust falling hopper is uneasy to be sealed.

Description

Double shell wet dust removal device

The utility model belongs to the boiler exhaust gas treatment technology, is the wet dust removal device that is used for Industrial Boiler.

The HCSS type double shell wet dust removal device of present domestic employing as shown in Figure 1, it mainly is made up of outer cylinder body 1, inner barrel 2, gas approach 3, exhanst gas outlet 4, annular collector pipe 5, ash dropping hopper 6.Its operation principle is: ash-laden gas tangentially enters outer cylinder body 1 with certain speed, grit gets rid of to barrel under centrifugal action, being installed in simultaneously has several nozzles to spray vaporific water droplet along the flue gas direction in the annular collecting system on the outer tube wall, because the impact of air-flow and the moisture film that rotatablely moves barrel inner surface formation one deck is constantly flowed, adhere to each other and flow to ash dropping hopper 6 with the grain dirt that is thrown on the barrel, flue gas after being purified is risen by inner barrel 2 bottom inlets, drains into chimney through smoke evacuation outlet (4).This deduster has only primary dust removing, and efficiency of dust collection is lower, and the ash dropping hopper place often has fouling phenomenon to take place in addition, and influence is operation normally.

The double shell wet dust removal device that provides a kind of efficiency of dust collection height, dust stratification to be easy to clear up is provided the purpose of this utility model.

The structure of this double shell wet scrubber as shown in Figure 3, it mainly is made up of outer cylinder body 1, inner barrel 2, gas approach 3, exhanst gas outlet 4, annular collecting system 5,13,14, upright core pipe 9, ash discharge drainage system 6,16,17,18.Inside and outside cylindrical shell is the cylinder that granite is made, its diameter and height dimension can be decided according to the exhaust gas volumn size that boiler is handled, the bottom of outer cylinder body has inspection opening 11, inner barrel 2 is located on the pedestal 12, (see figure 7) is formed by several piece deflector 15 in the cylindrical shell bottom, the arrangement of deflector is that to be 15 ° of angles uniform with level, makes that flue gas is spiral escalation when entering outer dirt pocket by interior dirt pocket bottom.Inner cover plate 10 is equipped with at the top of inner barrel 2, goes out interior dirt pocket 8 in order to prevent flue gas and water smoke.Gas approach 3 is arranged on the top of outer cylinder body 1, tangentially links to each other with inner barrel 2, and dirt pocket 8 in ash-laden gas is tangentially entered by import 3 makes flue gas have bigger centrifugal force.The centre of dirt pocket 8 in upright core pipe 9 is installed in, the lower end of pipe is that 90 ° of bend pipes stretch out outside the cylindrical shell, this pipe is made by granite, have several apertures in top 100～200mm scope of pipe, the aperture is 5～15mm, can be used for spray water mist, upright core pipe also can be used for connecting desulfurizer, and the diameter of pipe and the number of aperture are decided according to the size of deduster.The structure of annular collecting system as shown in Figure 5, collector pipe 5 is enclosed in the periphery of outer dirt pocket 7, be positioned at the top of outer cylinder body 1, the below of gas approach 3, have several holes on the inwall of collector pipe 5, be connected with outer dirt pocket 7 with short tube 14, each short tube is provided with the nozzle 13 that stainless steel is made.The ash discharge drainage system as shown in Figure 7, the hawk 17 that overflows is positioned at bottom one side of outer dirt pocket 7, apart from outer cylinder body 1 about 50mm, highly decide on the deduster size, but must be higher than outer dirt pocket bottom 30mm, the about 100mm of thickness is made by granite, water shutoff groove 18 is positioned at this bottom of device, and Sealing Surface is highly identical with excessive hawk 17.

The operation principle of this deduster is: the ash-laden gas that has certain speed tangentially enters interior dirt pocket 8 by import 3, being rotation under action of centrifugal force moves downward, grit is thrown toward perisporium, water smoke with upright core pipe 9 top aperture ejections meets, condenses simultaneously, and with moisture film along flowing to water shutoff groove 18 under the wall, finished primary dust removing.When the flue gas of preliminary purification was flowed to outer dirt pocket 7 by the deflector 15 of interior dirt pocket 8 bottoms, the water surface of impact water shutoff groove 18 after the droplet of generation and the grit in the flue gas clash into cohesion once more, entered outer dirt pocket 7, and this has just finished two-stage dust removal.On the annular collector pipe 5 water smoke that goes out of nozzle 13 outside the inwall of dirt pocket 7 form the even moisture film that flows from top to bottom, meet with the flue gas that rises at this dirt pocket, flue dust is captured once more, and with water film flow to water shutoff groove 18, finished third level dedusting.The press water that contains grey moisture film and tube for removing ash 16 that flows downward meets, and makes grit be difficult for successfully discharging through the hawk 17 that overflows in ash dropping hopper 6 depositions.Flue gas after being purified enters chimney by outlet 4.

The double shell wet dust removal device that the utility model provides improves efficiency of dust collection than original double shell wet scrubber and reaches 2 percentage points, and overcome the susceptible to plugging shortcoming of ash dropping hopper, has reached expected effect of the present invention.

Description of drawings

Fig. 1 is existing double shell wet scrubber structural representation;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is a double shell wet scrubber structure chart described in the utility model;

Fig. 4 is the A-A cutaway view of Fig. 3;

Fig. 5 is annular water collecting part separation structure figure;

Fig. 6 is the A-A cutaway view of Fig. 5;

Fig. 7 is an ash discharge water discharging part structure chart;

Fig. 8 is the B-B cutaway view of Fig. 7;

Fig. 9 is the deflector schematic diagram;

Below the utility model is described in further detail:

To be used in the smoke treatment amount is that the deduster of 4T/H boiler is an example.The deduster overall height is 5400mm, the wall thickness of outer cylinder body 1 is 170mm, diameter is 1600mm, 2 of inner barrel highly is 4550mm, and wall thickness is 150mm, and diameter is 1050mm, 12 of pedestal highly is 495mm, thickness is 200mm, and the bottom of inner barrel is made up of 6 deflectors 15, and it is uniform that deflector and horizontal direction are 15 ° of angles; The diameter of upright core pipe 9 is 25mm, and wall thickness is 40mm, has 6 apertures in the pipe top 150mm, and bore dia is 10mm; The height of excessive hawk 17 is 270mm, and thickness is 40mm, and above-mentioned parts are the granite material; Annular collector pipe 5 is a common steel tube, diameter is 40mm, 8 holes are arranged on the inwall of pipe, the aperture is 10mm, should have the short tube 14 of 8 10mm diameters to be connected with outer dirt pocket 7 relatively, and stainless steel nozzle 13 is housed on the every short tube, short tube is divided into two sections, the centre has articulation to connect, near one section employing common steel tube of annular collector pipe 5, near one section employing stainless steel tube of outer dirt pocket 7; Tube for removing ash 16 is positioned at the outer cylinder body bottom, apart from bottom 150mm place, establishes 2 altogether, adopts stainless steel tube, and caliber is 15mm.This deduster efficiency of dust collection reaches 97%.

Claims

1. double shell wet dust removal device, comprise outer cylinder body (1), inner barrel (2), gas approach (3), exhanst gas outlet (4), annular collector pipe (5), ash dropping hopper (6), it is characterized in that having set up upright core pipe (9) in the centre of interior dirt pocket (8), this pipe is the granite material, the lower end of pipe is that 90 ° of bend pipes stretch out the dirt pocket bottom, have some apertures in the top 100～200mm of pipe, the aperture is 5～15mm.

2. according to the described double shell wet dust removal of claim 1 device, it is characterized in that gas approach pipeline (3) tangentially links to each other with inner barrel (2), this pipeline is positioned at the top of dust arrester, is made by granite.

3. according to the described double shell wet dust removal of claim 1 device, it is characterized in that setting up in the ash discharge discharge structure two tube for removing ash (16) that stainless steel is made, it is positioned at the bottom of outer dirt pocket (7), and apart from bottom 100～300mm, caliber is 10～50mm.

4. according to the described double shell wet dust removal of claim 1 device, it is characterized in that the bottom of inner barrel (2) is made up of several piece deflector (15), the arrangement of deflector is that to be 15 ° of angles uniform with level.