CN210206306U

CN210206306U - Water bath dust removal device of lime digester for steelmaking

Info

Publication number: CN210206306U
Application number: CN201920611410.8U
Authority: CN
Inventors: Jian Zhang; 张健; Penghui You; 尤鹏辉; Ruiqiong Liu; 刘瑞琼; Fei Li; 李飞; Yuanlei Wei; 韦园磊; Lei Wang; 王磊
Original assignee: Luoyang Yalian Heavy Machinery Co Ltd
Current assignee: Luoyang Yalian Heavy Machinery Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-03-31
Anticipated expiration: 2029-04-30

Abstract

The utility model discloses a water bath dust removing device of a lime digester for steelmaking, which comprises a water tank and a fan, wherein the water tank is divided into a primary filtering area and a secondary filtering area by a partition plate, a spray tower is arranged on the primary filtering area, and the interior of the spray tower is communicated with the primary filtering area to ensure that waste gas discharged by a dust removing pipe enters the spray tower after passing through the primary filtering area; an atomization nozzle is arranged in the spray tower, and water in the secondary filtering area is absorbed through a spray pipe to perform spray dust removal on gas in the spray tower; the air suction port of the fan extends into the spray tower, the air exhaust port extends below the water surface of the secondary filtering area, so that the fan extracts the gas in the spray tower to enter the secondary filtering area for secondary filtering, and the top of the secondary filtering area is provided with a clean air exhaust port. The device solves the problems of smoke and dust generated in the lime digestion process, improves the air quality, improves the working environment of a digestion workshop, and reduces the harm to peripheral workers.

Description

Water bath dust removal device of lime digester for steelmaking

Technical Field

The utility model belongs to the technical field of steel sintering plant quicklime slaking and specifically relates to a water bath dust collector of lime slaker for steelmaking.

Background

With the development of modern industry, the quality of life of people is improved, the requirement on environmental protection is higher and higher, and safe production and clean production become civilized marks of modern enterprises. In the ferrous metallurgy industry, slaking the quicklime is an indispensable process, but the existing slaker can not slake the quicklime sufficiently, and can generate a large amount of smoke in the slaking process, and the smoke is mixed with CaO and Ca (OH) which are fine particles₂The dust surface area is large, the dust can be retained in the air for a long time, obvious lime smell exists in a workshop and the periphery of a batching room, the visibility of an operation area is very low in severe cases, workers are greatly harmed in the operation body, and steel structure equipment is corroded in the area and is prone to uncontrollable faults.

Ca(OH)₂The particles have high viscosity, fast precipitation and solidification, slow solution clarification, strong alkali property and strong corrosivity, and are easy to cause dust removal pipeline blockage, fan vibration and the like. Electric dust removal is generally adopted in the batching chamber, but in the dust removal process, dust is adhered to pipelines and polar lines and polar plates of a dust remover, so that equipment is damaged; the cloth bag is quickly stuck and is forced to be stopped in the cloth bag dust removal process due to the hydraulicity of dust, so that the cloth bag needs to be replaced within 2-3 months.

In the prior art, dust-containing gas generated in the lime slaking process is usually removed by means of a water bath, such as the following patent documents:

the utility model discloses a utility model with publication number CN206103575U discloses a quick lime digestion water bath dust collector, and the device removes dust through the dirty gas that produces among the dust removal pond and the dust remover casing to lime digestion process, and the water after will removing dust again carries out manual cleaning through the mud hole with the impurity that is detained in the aquatic. Although the device has certain dust removal effect to dirty gas, only rely on the gas after the dust removal freely to pass through the dust remover casing, can cause certain influence to dust removal rate, and carry out artifical clearance to the impurity after the dust removal, but still contain the particulate matter that can reuse in the impurity, this has just caused certain wasting of resources.

The existence of the above problems seriously affects the normal operation and the dust removal efficiency and speed of the dust removal system, so that special technical means are required to remove dust from the dust-containing flue gas generated in the lime slaking process.

SUMMERY OF THE UTILITY MODEL

The utility model provides a water bath dust collector of lime slaker for steelmaking, the effectual flue gas that has solved the lime digestion in-process and has produced of the device, the problem of raise dust, the impurity after still will removing dust is retrieved and is recycled, has improved the lime digestion rate, has reduced the waste of resource, has also improved the air quality simultaneously, has improved the operational environment in digestion workshop, has reduced the harm to peripheral staff.

The utility model discloses the technical essential who adopts does: a water bath dust removal device of a lime slaker for steelmaking comprises a water tank and a fan, wherein the water tank is a closed water storage tank body, a partition plate is arranged in the water tank and divides the interior of the water tank into a primary filtering area and a secondary filtering area, the end part of a dust removal pipe of the lime slaker extends below the water surface of the primary filtering area, a spray tower is arranged on the primary filtering area, the interior of the spray tower is communicated with the primary filtering area, so that waste gas discharged by the dust removal pipe enters the spray tower after being filtered by the primary filtering area; a plurality of atomizing nozzles are arranged in the spray tower, and the atomizing nozzles absorb water in the secondary filtering area through the spray pipes to perform spray dust removal on gas in the spray tower; the air suction port of the fan extends into the spray tower, the air exhaust port extends below the water surface of the secondary filtering area, so that the fan pumps the gas in the spray tower into the secondary filtering area for secondary filtering, and the top of the secondary filtering area is provided with a clean air exhaust port and a secondary filtering area water injection port; a water pump is arranged above the primary filtering area, and the water outlet of the water pump is connected with a recovery pipeline, so that water and impurities containing particulate matters which are retained in the primary filtering area after water bath dust removal enter the lime slaker through the recovery pipeline under the action of the water pump to be used as slaking water.

As a further optimization of the water bath dust removing device of the lime digester for steelmaking: the top and the bottom of the primary filtering area are respectively provided with a water inlet and a water outlet.

As a further optimization of the water bath dust removing device of the lime digester for steelmaking: and a water outlet is formed at the bottom of the secondary filtering area.

As a further optimization of the water bath dust removing device of the lime digester for steelmaking: the fan is fixedly arranged at the top of the secondary filtering area.

As a further optimization of the water bath dust removing device of the lime digester for steelmaking: the atomizing nozzles are positioned at different heights on the inner side of the spray tower so as to carry out multi-layer spray dust removal on the gas.

Has the advantages that:

the novel dust removal device is used, dust smoke and dust removal water which are retained in a primary filtering area after dust removal can be delivered to a lime slaker through a recovery pipeline to be used as slaking water, the utilization rate of lime is improved, meanwhile, the dust removal water is fully utilized, and the waste of water resources is reduced.

Secondly, use novel dust collector, under the effect of fan, form the negative pressure to dust removal pipeline, can be quick send dirty gas to the primary filtration district in, send the gas in the primary filtration district to the secondary filtration district simultaneously for the water bath dust removal rate.

And thirdly, the novel dust removal device is used, so that the flue gas and dust generated in the quicklime slaking process can be effectively and completely treated and purified, no dust pollution on site is guaranteed, the clean production of the lime slaking section of the sintering batching chamber is finally realized, and the emission concentration of the exhaust port completely meets the national emission standard.

Drawings

Fig. 1 is a schematic front view of the present invention;

fig. 2 is a schematic side view of the present invention;

the labels in the figure are: 1. the device comprises a water tank, 101, a partition plate, 102, a primary filtering area, 103, a secondary filtering area, 104, a clean air outlet, 105, a water filling port, 2, a spray tower, 201, a spray pipe, 3, a fan, 4, a dust removal pipe, 5, a water pump, 6 and a recovery pipeline.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The invention is further illustrated below with reference to examples.

Example 1

A water bath dust removal device of a lime slaker for steelmaking comprises a water tank 1, a fan 3 and a dust removal pipe 4 of the lime slaker, wherein the water tank 1 is a closed water storage tank body, a partition plate 101 is arranged in the water tank 1, the interior of the water tank is divided into a primary filtering area 102 and a secondary filtering area 103, the end part of the dust removal pipe 4 of the lime slaker extends below the water surface of the primary filtering area 102, a water inlet and a water outlet are respectively formed in the top and the bottom of the primary filtering area 102, dust-containing gas introduced into the dust removal pipe 4 has a pneumatic stirring effect on the interior of the water bath dust removal tank body, impurities in dust removal water are prevented from being precipitated, and water in the primary filtering area 102 is convenient to discharge from the; the primary filtering area 102 is provided with a spray tower 2, as shown in fig. 1 and 2, the interior of the spray tower 2 is communicated with the primary filtering area 102, so that the waste gas discharged from the dedusting pipe 4 enters the spray tower 2 after being filtered by the primary filtering area 102; a water pump 5 is arranged above the primary filtering area 102, so that impurities filtered and retained by the primary filtering area 102 enter the lime slaker again through a recovery pipeline 6 for recovery and reuse, the lime slaking efficiency is improved, and the waste of resources is reduced; a plurality of atomizing nozzles with different heights are arranged on the inner side of the spray tower 2, the atomizing nozzles absorb water in the secondary filtering area 103 through a spray pipe 201, multi-layer spraying and dust removal are carried out on gas in the spray tower 2, the top of the spray tower 2 is in an inverted funnel shape, and flue gas subjected to preliminary dust removal can conveniently enter the fan 3; the fan 3 is fixedly arranged at the top of the secondary filtering area 103, an air suction port of the fan 3 extends into the spray tower 2, an air exhaust port extends into the position below the water surface of the secondary filtering area 103, so that the fan 3 extracts gas in the spray tower 2 to enter the secondary filtering area 103 for secondary filtering, a water outlet is formed in the bottom of the secondary filtering area 103, and a clean air outlet 104 and a water inlet 105 of the water tank 1 are formed in the top of the secondary filtering area 103, so that water in the secondary filtering area 103 can be prevented from flowing out through the clean air outlet 104, water in the fan 3 can be purified again through the secondary filtering area 103, and finally gas overflowing through the clean air outlet 104 is clean gas, the air environment of a lime digestion operation room is greatly improved, and meanwhile, the harm of harmful gas to workers is reduced.

The utility model discloses an operation flow does: the flue gas that contains impurity such as dust that the lime slaking in-process produced gets into in the primary filtration district through the dust removal pipe and removes dust for the first time, simultaneously because the use of the fan of setting in the secondary filtration district top, the induction port through the fan forms the negative pressure with the spray column in the primary filtration district, make the flue gas through the first dust removal get into the spray column, rethread spray pipe drenches with the rain and removes dust, then under the effect of fan, get into the secondary filtration district, carry out the dust removal of last time, the flue gas after the dust removal at last discharges in the air through clean air discharge port. And a large amount of dust is retained in the primary filtering area after primary dust removal, and returns to the lime slaker through a recovery pipeline again under the action of a water pump for recovery and reuse.

Claims

1. The utility model provides a water bath dust collector of lime slaker for steelmaking which characterized in that: the water bath dust removal device comprises a water tank (1) and a fan (3), wherein the water tank (1) is a closed water storage tank body, a partition plate (101) is arranged in the water tank and divides the interior of the water tank into a primary filtering area (102) and a secondary filtering area (103), the end part of a dust removal pipe (4) of the lime slaker extends below the water surface of the primary filtering area (102), a spray tower (2) is arranged on the primary filtering area (102), the interior of the spray tower (2) is communicated with the primary filtering area (102), so that waste gas discharged by the dust removal pipe (4) enters the spray tower (2) after being filtered by the primary filtering area (102); a plurality of atomizing nozzles are arranged in the spray tower (2), and the atomizing nozzles absorb water in the secondary filtering area (103) through a spray pipe (201) to spray and remove dust from gas in the spray tower (2); an air suction port of the fan (3) extends into the spray tower (2), an air exhaust port extends below the water surface of the secondary filtering area (103) so that the fan (3) can extract air in the spray tower (2) to enter the secondary filtering area (103) for secondary filtering, and a clean air exhaust port (104) and a water injection port (105) of the secondary filtering area (103) are arranged at the top of the secondary filtering area (103); a water pump (5) is arranged above the primary filtering area (102), and the water outlet of the water pump (5) is connected with a recovery pipeline (6) so that water and impurities containing particulate matters which are retained in the primary filtering area (102) after water bath dust removal enter a lime slaker through the recovery pipeline (6) under the action of the water pump (5) to be used as slaking water.

2. The dust removing device for a water bath of a lime digester for steelmaking as claimed in claim 1, wherein: the top and the bottom of the primary filtering area (102) are respectively provided with a water inlet and a water outlet.

3. The dust removing device for a water bath of a lime digester for steelmaking as claimed in claim 1, wherein: a water outlet is arranged at the bottom of the secondary filtering area (103).

4. The dust removing device for a water bath of a lime digester for steelmaking as claimed in claim 1, wherein: the fan (3) is fixedly arranged at the top of the secondary filtering area (103).

5. The dust removing device for a water bath of a lime digester for steelmaking as claimed in claim 1, wherein: the atomizing nozzles are positioned at different heights on the inner side of the spray tower (2) to carry out multi-layer spray dedusting on the gas.