CN2159825Y - Auto exciting venturi tube duster - Google Patents

Abstract

The utility model relates to a wet scrubbing duster, which is suitable for the cleanness of non-fiber dust and gas of industrial drying, in particular for the dust purification of a boiler and a heating stove for burning soft coal. The automatic exciting venturi tube duster of the utility model is composed of a duster body, a venturi tube and a cone-typed multihole cover (4). The utility model has secondary dusting effect, having the advantages of simple and compact structure, small ground occupation, convenient installation and maintenance, and low operational cost. Dusting efficiency reaches more than 94%, in particular, the utility model can effectively catch dust of hydrophobicity.

Description

Auto exciting venturi tube duster

The utility model relates to a kind of wet scrubbing formula dust arrester of Air Pollution prevention and control, is suitable for the nonhydratable multiple dust purifications of industry such as smelting, casting, construction material and refractory material, is particularly suited for the clarifying smoke of boiler, heating furnace (kiln).

In the manufacturing technology of known wet scrubbing formula dust arrester with comparatively approaching the having of the utility model " venturi scrubber " and " automatically swash mist dust remover ".The former is known Venturi tube, and it is made up of three parts: priming device (sprayer), Venturi tube body and dehydrator are formed, thereby realize atomizing, coalescence and three processes of dehydration in venturi scrubber.Because the Venturi tube degree of purification depends on wind speed, the design wind speed during high-effective dust-removing should reach 80～120/S, so the drag losses of deduster is big, operating cost is not low.The latter is a Chinese patent, the patent No.: CN882086456, and head takes place its water smoke that is made of straight bobbin and taper foraminous shield and the deduster body is formed.It utilizes the kinetic energy of dust-contained airflow, the water column that is ejected into deduster body wall is controlled at refraction, refinement in the escutcheon of taper, and form boiling liquid level contact zone, intensive water smoke district, cover along cascade district and sedimentation water smoke district once more, thereby more efficient ground purifies flue dust.But because it is identical to the caliber of giving vent to anger from air inlet, wind speed is changed, relative velocity between water droplet and the air-flow is little, do not reach power coalescence efficient preferably, especially to being that the boiler of fuel, the flue dust that heating furnace (kiln) is produced (belonging to the hydrophobicity dust) are handled with bituminous coal, effect does not still reach national grade one discharge standard.If being connected in series a deduster again carries out two-stage dust removal, though can be up to standard, floor space increases, operating cost also increases.

The purpose of this utility model is to reduce the drag losses of deduster, improves power coalescence efficient, thereby further reduces the purifying rate of operating cost and raising hydrophobicity flue dust.

For reaching this purpose, the utility model in the following way:

(1) replace the straight bobbin that swashs water smoke generation head automatically with the Venturi tube body, promptly increaser and the taper foraminous shield by the low pipe of literary composition constitutes secondary water smoke generation head.

(2) connect the go ahead of the rest one-level atomizing of diversion jet pipe at the Venturi tube trunnion.

This device has the two-stage dust removal effect, and compact conformation is simple, and floor space is little, manufacturing, installation and maintenance convenience, and operating cost is low, and efficiency of dust collection is high and stable, especially can trap the hydrophobicity dust effectively, and efficiency of dust collection reaches more than 94%.

Fig. 1 swashs the venturi scrubber schematic diagram automatically

Be described in further detail below in conjunction with accompanying drawing.

With reference to Fig. 1, taper foraminous shield ［ 4 ］ is socketed in the increaser ［ 13 ］ of Venturi tube and goes up (head takes place secondary water smoke), the external diversion jet pipe of the trunnion of Venturi tube ［ 2 ］ ［ 10 ］ (one-level atomizing), reducing pipe ［ 9 ］ butt joint air inlet pipe ［ 6 ］, and be fixed on the water smoke breast board ［ 8 ］, constitute and swash the Venturi tube body automatically, be arranged in the dust catcher chamber.Deduster body ［ 5 ］ top one side is discharge pipe ［ 12 ］, the top is cover plate ［ 7 ］, the dirt plate ［ 14 ］ that inclines is equipped with in the bottom, and worn-out open type mouthful bottom one side of scratching in the ashes is equipped with ball-cock assembly ［ 3 ］ and the overflow pipe ［ 2 ］ that the control water inlet is housed on gate valve ［ 1 ］, the top water seal normal water level line.

As shown in Figure 1, when dusty gas by air inlet pipe ［ 6 ］ when entering Venturi tube, high velocity air makes the shower nozzle place of diversion jet pipe ［ 10 ］ produce negative pressure, by diversion jet pipe ［ 10 ］ the water siphon in the water seal position in the dirt pocket is sprayed to the interior dust-contained airflow of trunnion ［ 11 ］, make that dust mixes, humidification and coalescence, carry out primary dust removing and handle.The dust-contained airflow that comes out from Venturi tube flings the water seal position water surface, carry out gas-water separation and inertial settling, the secondary water smoke that the water column that is evoked makes up at taper foraminous shield ［ 4 ］ and increaser ［ 13 ］ takes place to reflect on the head, refinement, and form boiling liquid level contact zone, intensive water smoke district, cover along cascade district and sedimentation water smoke district once more, carrying out secondary humidification and coalescence, making unclean flue dust wash away sedimentation along the cascade district at cover.

When industry is made, the automatically sharp Venturi tube that Venturi tube and taper foraminous shield ［ 4 ］ constitute, should make the big transverse plane of taper foraminous shield ［ 4 ］ exceed increaser ［ 13 ］ exit end face 30～150mm, during installation, the dried up Sealing Surface of increaser ［ 13 ］ exit end face is not more than 300mm, the height of trunnion ［ 11 ］ is 100～250mm, bore be increaser ［ 13 ］ and reducing pipe ［ 9 ］ separately the large port footpath 1/4 to 4/5.The diversion jet pipe ［ 10 ］ that is connected on outward on the trunnion ［ 11 ］ is 1～8, and setting the interior wind speed of trunnion ［ 11 ］ is good with 30～60m/s.Handle air quantity less than 4000m ³During/n, diversion jet pipe ［ 10 ］ water inlet end inserts water seal position in the dirt pocket, and directly siphon spraying is if handle air quantity greater than 4000m ³During/h, diversion jet pipe ［ 10 ］ water inlet end switching water pump supplies water.The height of increaser ［ 13 ］ is 1 to 3 times of reducing pipe ［ 9 ］.

Claims (5)

1, a kind of by the deduster that is provided with the water smoke baffle plate, head takes place for the deduster body of incline dirt plate, gate valve, overflow pipe, air inlet pipe, discharge pipe and taper foraminous shield water smoke and Venturi tube is constituted, the big air inlet pipe (6) that is fastened on the water smoke breast board (8) of holding of reducing pipe (9) that it is characterized in that Venturi tube, the trunnion (11) of diversion jet pipe (10) is equipped with in the small end connection, and trunnion (11) bottom connects the increaser (13) that is with taper foraminous shield (4).

2, deduster according to claim 1 is characterized in that increaser (13) highly is 1 to 3 times of reducing pipe (9).

3, deduster according to claim 1 is characterized in that trunnion (11) is increaser (13) and reducing pipe (9) 1/4 to 4/5 times of large port footpath separately for 100-250mm, bore highly.

4, deduster according to claim 1 is characterized in that it is 1 to 8 that water inlet end can directly insert the diversion jet pipe (10) that carries out the siphon water spray in the dirt pocket under the water seal position.

5, according to the described deduster of claim 1 to 4, it is characterized in that the big transverse plane of taper foraminous shield (4) exceeds increaser (13) exit end face 30-150mm, the dried up Sealing Surface of increaser (13) exit end face is less than 300mm.