CN214972810U - Graded gradient dust removing device of dust removing system of reduced iron tunnel kiln - Google Patents

Abstract

The utility model discloses a hierarchical gradient dust collector of reduced iron tunnel cave dust pelletizing system, it has solved prior art equipment cost height, dust removal effect difference, polluted environment scheduling problem, its characterized in that: the three-stage dry and wet dust removal device is a gravity settling dust remover consisting of a dust removal chamber, an air inlet pipe orifice, an air outlet pipe orifice and a dust collection funnel, a cyclone dust remover consisting of an inner layer filter screen barrel, an outer barrel, a conical barrel cover and a conical dust collection funnel and a bag-type dust remover consisting of a dust removal bag, a sealing pool, a water pump and a spray header. The power of the first-stage dust collection and the second-stage dust collection is from the induced draft fan, and the dust firstly passes through the gravity settling chamber to collect heavier waste reducing agent particles, generally 10g-250 g. The lighter dust enters the cyclone dust collector, enters the bag-type dust collector after secondary cyclone dust collection and then enters the atmosphere. Has the advantages of reasonable structure, safe use, waste utilization, high efficiency, environmental protection and the like, and has wide popularization and application values.

Description

Graded gradient dust removing device of dust removing system of reduced iron tunnel kiln

Technical Field

The utility model belongs to environmental protection dust collecting equipment field especially relates to a hierarchical gradient dust collector of reduced iron tunnel cave dust pelletizing system.

Background

During the production of the reduced iron tunnel kiln, a large amount of waste reducing agent is generated. In the discharging system, the waste reducing agents need to be sucked out by a fan and a pipeline so as to take out the sponge iron ingots. Due to the action of wind, a lot of dust is inevitably generated. Some of these dusts are larger and some are smaller. The manufacturing enterprises need to remove dust before discharging the waste gas in the kiln into the air, so that the waste gas reaches the environmental protection requirement of national waste gas discharge. The atmospheric emission standard of industrial kilns in China usually selects indexes of one type, two types and three types. Indexes such as flue gas, dust, sulfur dioxide, nitrogen oxide and the like make strict regional execution emission indexes in recent years. Currently, the dust collector commonly used in industrial kilns is of a cloth bag type, an electrostatic type, a wet type, a water spraying type, a water film type, a multistage type and the like. Most dust collectors have the problems of high price, poor dust removal effect and the like, and cannot meet the national specified waste gas environment-friendly emission requirement. The brand new combined gradient dust remover is divided into three parts, namely a primary dust remover, namely gravity dust removal, a secondary dust remover, namely cyclone dust removal, and a tertiary dust remover, namely cloth bag dust removal, uniformly collects and treats all dust regardless of particle size, and finally discharges gas meeting the national specified waste gas environmental protection requirement.

Disclosure of Invention

The utility model aims at providing a hierarchical gradient dust collector of reduced iron tunnel cave dust pelletizing system that rational in infrastructure, simple manufacture can retrieve useless reductant recycle, flue gas and reach national emission standard for market.

The technical scheme of the utility model is that: it is composed of a gravity settling dust remover, a cyclone dust remover and a bag-type dust remover three-level gradient dust removing device. The gravity settling dust remover comprises a dust removal chamber, an air inlet pipe orifice, an air outlet pipe orifice and a dust collection funnel, wherein the dust removal chamber is fixedly mounted on a first support frame and is a cuboid, an access hole is formed in the top of the dust removal chamber, and a first dust collection funnel and a second dust collection funnel are arranged at the bottom of the dust removal chamber. The indoor fender that has set up of funnel junction flows the board to the dust removal chamber inner wall in collection dirt funnel top has set up the slot of interlude baffle, and this baffle slot forms two angle bar welding at the dust removal chamber inner wall. The first baffle lower part of first collection dirt funnel top stretches into in the funnel, and it stretches into length and is not more than the half of funnel height, and the height and the clean room height of the second baffle of second collection dirt funnel top are the same, and the middle part keeps off the height that flows the board and is not less than the one-third of clean room height, is not more than the two-thirds of clean room height. The air inlet pipe orifice is connected with the kiln body smoke exhaust pipeline through the reducing joint, and the air outlet pipe orifice is connected with the air inlet of the draught fan through the reducing joint and the first smoke exhaust pipeline. The cyclone dust collector is composed of an inner layer filter screen barrel, an outer barrel, a conical barrel cover and a conical dust collecting funnel, the inner layer filter screen barrel is fixedly installed on a second supporting frame, the outer barrel is connected with a conical cover arranged above the outer barrel and the conical dust collecting funnel arranged below the outer barrel, the upper neck of the inner layer filter screen barrel is welded with the conical cover arranged above the outer barrel into a whole, the top of the inner layer filter screen barrel is provided with an air outlet pipe opening connected with a smoke exhaust pipeline, and the inner layer filter screen barrel is formed by rolling a metal filter screen with the mesh number of 100. The cyclone air inlet pipe mouth is the heliciform, sets up on outer barrel wall upper portion, links to each other with the gas outlet of draught fan through air intake pipe joint and second exhaust pipe. The bag-type dust collector comprises a dust collection bag, a sealing pool, a water pump and a spray header, wherein a top air inlet of the dust collection bag is connected with a top air outlet pipe orifice of the cyclone dust collector through a third exhaust pipe, a water inlet pipe orifice of the water pump is arranged at the lower part of the sealing pool, a water outlet pipe of the water pump is connected with the spray header arranged in a dust hood arranged at the top of the dust collection bag, and a valve is arranged on a pipe connected with the spray header. The dust removal chamber, the dust collection funnel, the outer barrel, the conical barrel cover and the like are all formed by welding steel plates with the thickness of 5-8 mm.

The utility model has the advantages that: because three dry and wet dust removal modes of gravity settling, cyclone dust removal and cloth bag dust removal are organically combined into a whole, the waste reducing agent can be recycled, and the discharged flue gas meets the flue gas emission standard of an industrial furnace through detection. The workshop is clean and sanitary, smoke and dust can not be seen in the sky, and the former dirty, messy and poor factories are vigorous. Has the advantages of reasonable structure, safe use, waste utilization, high efficiency, environmental protection and the like, and has wide popularization and application values.

The present invention will be further described with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic view of the structure of the present invention;

fig. 2 is a schematic view of the top view structure of the present invention.

In the figure: the dust removal device comprises a support frame 1, a dust removal chamber 2, an air inlet pipe opening 3, an air outlet pipe opening 4, a reducer joint 5, a first dust collection funnel 6, a second dust collection funnel 7, a maintenance hole 8, a flow baffle plate 9, a first baffle plate 10, a second baffle plate 11, a first smoke exhaust pipe 12, an induced draft fan 13, a second smoke exhaust pipe 14, an air inlet pipe joint 15, an outer barrel 16, a cyclone air inlet pipe opening 17, a conical barrel cover 18, an inner-layer filter screen barrel 19, a conical dust collection funnel 20, a cyclone air outlet pipe opening 21, a second support frame 22, a third smoke exhaust pipe 23, a dust removal cloth bag 24, a sealing pool 25, a water pump 26, a smoke exhaust pipe 27 and a valve 28.

Detailed Description

As shown in fig. 1 and 2, the graded gradient dust removing device of the reduced iron tunnel kiln dust removing system is formed by combining a gravity settling dust remover, a cyclone dust remover and a bag-type dust remover three-level gradient dust removing device, wherein the gravity settling dust remover is composed of a dust removing chamber 2, an air inlet pipe opening 3, an air outlet pipe opening 4, a dust collecting funnel and the like, and is fixedly installed on a first support frame 1. Dust removal chamber 2 is the cuboid, has set up access hole 8 at the top of dust removal chamber 2, and the bottom has set up first collection dirt funnel 6 and second collection dirt funnel 7, has set up the fender stream board 9 in the room of funnel junction to 2 inner walls in the dust removal chamber of collection dirt funnel top have set up the slot of interlude baffle. The lower part of the first baffle plate 10 above the first dust collecting funnel 6 extends into the funnel, the lower part of the first baffle plate extends into the first dust collecting funnel 6 with a length which is half of the height of the first dust collecting funnel 6, the height of the second baffle plate 11 is the same as the height of the dust chamber 2, and the height of the middle baffle plate 9 is half of the height of the dust chamber 2. The air inlet pipe mouth 3 is connected with the kiln body smoke exhaust pipeline through a reducing joint, and the air outlet pipe mouth 4 is connected with an air inlet of an induced draft fan 13 through a reducing joint 5 and a first smoke exhaust pipeline 12. The cyclone dust collector is composed of an inner layer filter screen barrel 19, an outer barrel 16, a conical barrel cover 18, a conical dust collecting funnel 20 and the like, and is fixedly arranged on a second supporting frame 22. The outer barrel 16 is connected with a conical cover 18 arranged above and a conical dust collecting funnel 20 arranged below, the upper neck part of the inner layer filter screen barrel 19 is welded with the conical cover 18 arranged above the outer barrel 16 into a whole, the top part is provided with a cyclone air outlet pipe mouth 21 connected with a smoke exhaust pipeline, and the inner layer filter screen barrel 19 is formed by rolling a metal filter screen with the mesh number of 100. The cyclone air inlet pipe orifice 17 is in a spiral shape, is arranged on the upper part of the barrel wall of the outer barrel 16 and is connected with an air outlet of the induced draft fan 13 through an air inlet pipe joint 15 and a second smoke exhaust pipeline 14. The bag-type dust collector comprises a dust collection bag 24, a sealing pool 25, a water pump 26 and a spray header, wherein a top air inlet of the dust collection bag 24 is connected with an air outlet pipe opening 21 at the top of the cyclone dust collector through a third smoke exhaust pipe 23, a water inlet pipe opening of the water pump 26 is arranged at the lower part of the sealing pool 25, a water outlet pipe of the water pump is connected with the spray header arranged in a dust hood arranged at the top of the dust collection bag 24, and a valve 28 is arranged on a pipe connected with the spray header. The dust removing chamber 2, the dust collecting funnel, the outer barrel 16 and the conical barrel cover 18 are all formed by welding steel plates with the thickness of 6 mm.

Implement the utility model discloses the time, utilize draught fan 13 and exhaust pipe to divide the useless reducing agent of remaining in with the carborundum jar to suck away twice, the draught fan takes away useless reducing agent and dust through suction earlier behind pipeline and valve, arrives in the one-level gravity settling chamber again. Gravity precipitators collect relatively heavy spent reductant particles, typically in the range of 10g to 250 g. The lighter dust enters the cyclone dust collector, and part of the dust falls into the conical dust collecting hopper. The smoke and dust gas dedusted by the secondary cyclone deduster enters the bag deduster, a spray head is arranged in a collecting cover at the top of the bag deduster, and dust and water drops fall into the water tank together. The flue gas after graded gradient dust removal treatment is directly discharged into the air through the smoke discharge pipe 27. Because each stage of dust removal collects dust in a relatively sealed environment, the finally discharged flue gas completely reaches the emission standard.

Claims (5)

1. The utility model provides a hierarchical gradient dust collector of reduced iron tunnel cave dust pelletizing system, it includes three level gradient dust collector of gravity settling dust remover, cyclone and sack cleaner, its characterized in that: the gravity settling dust remover comprises a dust removal chamber (2), an air inlet pipe orifice (3), an air outlet pipe orifice (4) and a dust collection funnel, and is fixedly installed on a first support frame (1), the dust removal chamber (2) is cuboid, an access hole (8) is formed in the top of the dust removal chamber (2), a first dust collection funnel (6) and a second dust collection funnel (7) are arranged at the bottom of the dust removal chamber, a flow baffle plate (9) is arranged in the chamber at the joint of the funnels, slots for inserting baffle plates are formed in the inner wall of the dust removal chamber (2) above the dust collection funnels, the air inlet pipe orifice (3) is connected with a kiln body smoke exhaust pipeline through a reducing joint, and the air outlet pipe orifice (4) is connected with an air inlet of an induced draft fan (13) through the reducing joint and a first smoke exhaust pipeline (12); the cyclone dust collector comprises an inner-layer filter screen barrel (19), an outer barrel (16), a conical barrel cover (18) and a conical dust collecting funnel (20), the inner-layer filter screen barrel is fixedly installed on a second support frame (22), the outer barrel (16) is connected with the conical barrel cover (18) arranged above and the conical dust collecting funnel (20) arranged below, the upper neck of the inner-layer filter screen barrel (19) is welded with the conical barrel cover (18) arranged above the outer barrel (16) into a whole, the top of the inner-layer filter screen barrel is provided with a cyclone air outlet pipe orifice (21) connected with a smoke exhaust pipeline, the cyclone air inlet pipe orifice (17) is spiral and is arranged on the upper part of the barrel wall of the outer barrel (16), and the cyclone air outlet pipe orifice is connected with an air outlet of a draught fan (13) through an air inlet pipe joint (15) and a second smoke exhaust pipeline (14); the bag-type dust collector comprises a dust collection bag (24), a sealing pool (25), a water pump (26) and a spray head, wherein a top air inlet of the dust collection bag (24) is connected with a cyclone air outlet pipe (21) at the top of the cyclone dust collector through a third smoke exhaust pipeline (23), a water inlet pipe of the water pump (26) is installed at the lower part of the sealing pool (25), a water outlet pipeline of the water pump is connected with the spray head arranged in a dust removal cover at the top of the dust collection bag (24), and a valve (28) is arranged on a pipeline connected with the spray head.

2. The graded gradient dust removing apparatus of a reduced iron tunnel kiln dust removing system according to claim 1, characterized in that: the utility model discloses a dust collector, including dust catcher air inlet end, gravity subside dust catcher air inlet end, first baffle (10) the first portion of collecting dust funnel (6) top of gravity lower part stretch into in the funnel, it stretches into length and is not more than the half of funnel height, and the height of second baffle (11) of second collection dust funnel (7) top is the same with clean room (2) height, and the middle part keeps off the highly one-third that is not less than clean room (2) height of flowing board (9), is not more than two-thirds of clean room (2) height.

3. The graded gradient dust removing apparatus of a reduced iron tunnel kiln dust removing system according to claim 1 or 2, characterized in that: the baffle slot in the gravity settling dust collector is formed by fixedly mounting two angle irons on the inner wall of the dust chamber (2).

4. The graded gradient dust removing device of the dust removing system of the reduced iron tunnel kiln according to claim 3, characterized in that: the dust removal chamber (2), the dust collection funnel, the outer barrel (16) and the conical barrel cover (18) are all formed by welding steel plates with the thickness of 5-8 mm.

5. The graded gradient dust removing device of the dust removing system of the reduced iron tunnel kiln according to claim 4, characterized in that: the inner-layer filter screen barrel (19) of the cyclone dust collector is formed by rolling a metal filter screen with the mesh number of 80-120.

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