CN2372043Y

CN2372043Y - Tail gas waste heat exchange dust removing device

Info

Publication number: CN2372043Y
Application number: CN 99236158
Authority: CN
Inventors: 叶永润
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-05-27
Filing date: 1999-05-27
Publication date: 2000-04-05
Anticipated expiration: 2009-05-27

Abstract

The utility model is composed of an upper layer of atomizing chamber and a lower layer of atomizing chamber, wherein, the lower layer of atomizing chamber is composed of a lower flue 19, a lower shielding can 17, a lower atomizing chamber body 15, a downpipe 10, a water receiving funnel 13 and a heat exchanger 12, the upper layer of atomizing chamber is composed of an upper flue 8, an upper shielding can 6, an upper atomizing chamber body 5, a high-pressure spray header 4 and a high-pressure water pipe 3, and the upper atomizing chamber and the lower atomizing chamber are separated by a partition board 9. The utility model has simple equipment, smoke gas is treated by water fog and steam, atomizing thickness is large, and dust suction effect is favorable; the utility model is especially suitable for a kiln and a boiler with the smoke gas of higher temperature; when the smoke gas is treated, the operation of heat exchange is simultaneously carried out, and residual heat is fully utilized; therefore, the utility model has two functions of dust removal and waste heat utilization.

Description

Using waste heat from tail gas exchange deduster

The utility model relates to environmental protection equipment.

In some high-temperature calcination equipment, for example: furnace cupola, incinerator, fluidized bed furnace etc., its flue gas contains harmful substances such as grit; directly enter in the atmosphere; contaminated environment is the protection environment, needs to install device for eliminating smoke and dust; meet the requirements with the gas that guarantees discharging; the present industrial bagroom that generally adopts, bagroom adopts cloth bag that dusty gas is filtered, and it is simple to have equipment; the dust-collecting efficiency advantages of higher, but it can not be used for the delivery temperature occasion of higher (being higher than 120 ℃).Also have cottrell, utilize high-pressure electrostatic with the grit polarization and be adsorbed onto electrode, it is simple to have equipment equally, the dust-collecting efficiency advantages of higher, but equipment investment is big, and difficult in maintenance, the operating cost height, thereby be not suitable for small oven.

A kind of spray nebulization dust device being arranged, build an expansion chamber at exhaust outlet, sprays water with high pressure and nebulizes or moisture film in its top, allow ash-laden gas pass through expansion chamber, water smoke is being carried grit secretly and is being sunk to the discharge of expansion chamber bottom, and this equipment is simple, reduced investment, easy care also has certain dust collection effect.

The purpose of this utility model is a kind of spray nebulization dust device of design, it is directly installed on the exhaust outlet of working furnace, utilize the high temperature of flue gas that shower water is flashed to steam, under the acting in conjunction of dense steam and shower water, with the dissolving of the harmful substance in the gas, sedimentation, also consider the heat utilization of high-temperature steam, heat-exchange tube is installed in spray chamber, gather dust and the UTILIZATION OF VESIDUAL HEAT IN dual purpose thereby reach.

The utility model is double-deck spray chamber structure, lower floor's spray chamber is made up of lower flue, following cage, following spray chamber body, downpipe, water receiving funnel and heat exchanger, the upper strata spray chamber is by upper flue, last cage, last spray chamber body, and high-pressure spraying head and water pipe, gas-liquid separator and exhaust opening are formed.

The levels spray chamber is separated with dividing plate, reserves floss hole in the middle of the division board and downpipe is installed.

Cage enters down spray chamber to allow ash-laden gas pass through down from lower flue, enter spray chamber from the upper flue that is mounted on division board central authorities through last cage again, after the gas that purifies is flowed through the gas-liquid separator that is installed in the spray chamber top, enter atmosphere from blast pipe.

Increase setting-out and make water become 120 ° of ejections downwards, make spray chamber be full of water smoke, drop on the division board of spray chamber bottom after grit in the gas that water smoke will pass through and harmful substance dissolving, the cohesion to the high-pressure spraying head.

Cohesion water enters into down on the water receiving funnel of spray chamber by downpipe, and the water receiving funnel flows to down the water of collecting on the cage, and following cage flashes to steam with water, makes down spray chamber be full of the steam of heat.

With the heat exchange medium heat exchanger of flowing through, vapours passes to medium in the heat exchanger with heat, carries out heat exchange.

Drop to down the spray chamber bottom after grit in the gas that steam will pass through and harmful substance dissolving, the cohesion, the cohesion water of carrying harmful substance secretly is for further processing through the blow-off pipe discharge.

Flue gas then rises and walks around the water receiving funnel and enter spray chamber from upper flue and do after-treatment.

The utility model equipment is simple, and with water smoke and steam treatment flue gas, atomizing concentration is big, and dust collection effect is good, is particularly suitable for the higher kiln of flue-gas temperature and uses, and carries out heat exchange in smoke treatment, makes full use of waste heat.So the utlity model has dedusting and UTILIZATION OF VESIDUAL HEAT IN dual-use function.

Example with accompanying drawing is further described the utility model below:

Fig. 1 is a cutaway view of the present utility model,

Fig. 2 is an A-A cross-sectional view among Fig. 1.

The utility model is double-deck spray chamber structure, and lower floor's spray chamber is made up of lower flue 19, following cage 17, following spray chamber body 15, downpipe 10, water receiving funnel 13 and heat exchanger 12, and following cage 17 is installed in the top of lower flue 19 for falling barrel-like structure.

The levels spray chamber is separated with division board 9, reserves floss hole in the middle of the division board 9 and downpipe 10 is installed.

Downpipe 10 lower ends lifting water receiving funnel 13.

The upper strata spray chamber is by upper flue 8, last cage 6, last spray chamber body 5, high-pressure spraying head 4 and high-pressure water pipe 3, gas-liquid separator 2, exhaust opening 1 are formed, last cage 6 is for falling barrel-like structure, be installed in the top of upper flue 8, spray head 3 is installed in the end of high-pressure water pipe 3, spray head 3 is placed on the top of cage 6, gas-liquid separator 2 is installed at the top of last spray chamber.

Cage 17 enters down spray chamber to allow ash-laden gas pass through down from lower flue 19, enter spray chamber from the upper flue 8 that is mounted on division board 9 central authorities through last cage 6 again, after the gas that purifies is flowed through the gas-liquid separator 2 that is installed in the spray chamber top, enter atmosphere from smoke exhaust pipe 1.

Increase setting-out to high-pressure spraying head 4 from high-pressure water pipe 3, make water become 120 ° of ejections downwards, make spray chamber be full of water smoke, drop on the division board 9 of spray chamber bottom after grit in the gas that water smoke will pass through and harmful substance dissolving, the cohesion.

Cohesion water enters into down by downpipe 10 on the water receiving funnel 13 of spray chamber, and the water receiving funnel flows to down the water of collecting on the cage 17, and following cage 17 flashes to steam with water, makes down spray chamber be full of hot steam.

Heat exchanger 12 is a helical structure, cage 17 tops is installed down near the position of spray chamber body 15 down, and with the heat exchange medium heat exchanger 12 of flowing through, vapours passes to medium in the heat exchanger 12 with heat, carries out heat exchange.

Drop to down the spray chamber bottom after grit in the gas that steam will pass through and harmful substance dissolving, the cohesion, the cohesion water of carrying harmful substance secretly is for further processing through blow-off pipe 20 discharges.

Flue gas then rises and walks around water receiving funnel 13 and enter spray chamber from upper flue 8 and do after-treatment.

Claims

1, using waste heat from tail gas exchange deduster is made of upper strata spray chamber and lower floor's spray chamber, it is characterized in that:

Described lower floor spray chamber is made up of lower flue (19), following cage (17), following spray chamber body (15), downpipe (10), water receiving funnel (13), heat exchanger (12), following cage (17) is installed in the top of lower flue (19), and water receiving funnel (13) is installed in down the top of cage (17);

Described upper strata spray chamber is made up of upper flue (8), last cage (6), last spray chamber body (5), high-pressure water pipe (3) and high-pressure spraying head (4), last cage (6) is installed in the top of upper flue (8), and spray head (3) is placed in the top of cage (6);

The levels spray chamber is separated with division board (9), reserves floss hole in the middle of the division board (9) and downpipe (10) is installed, and water receiving funnel (13) is hung in the lower end of downpipe (10).

2, using waste heat from tail gas according to claim 1 exchange deduster is characterized in that being equipped with at the top of last spray chamber gas-liquid separator (2).

3, using waste heat from tail gas exchange deduster according to claim 1 and 2 is characterized in that described heat exchanger (12) is a helical structure, is installed in down the top of cage (17).