CN209802111U - Direct evaporative cooling device for treating dioxin in electric furnace - Google Patents
Direct evaporative cooling device for treating dioxin in electric furnace Download PDFInfo
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- CN209802111U CN209802111U CN201920409614.3U CN201920409614U CN209802111U CN 209802111 U CN209802111 U CN 209802111U CN 201920409614 U CN201920409614 U CN 201920409614U CN 209802111 U CN209802111 U CN 209802111U
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- flue
- evaporative cooling
- dioxin
- direct evaporative
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Abstract
The utility model discloses an administer direct evaporative cooling device of electric stove dioxin belongs to the dust removal technical field of metallurgical industry, include adiabatic flue, evaporative cooler and defeated ash storage facility that sets gradually outside electric stove scrap steel preheating device, it has two at least waste gas nozzles to distribute in adiabatic flue import and along adiabatic flue axial, and it has a plurality of two medium spray guns to distribute in adiabatic flue export and along adiabatic flue circumference, be equipped with the exhanst gas outlet with dust pelletizing system pipe connection on the evaporative cooler. The utility model discloses an adiabatic flue is done flue gas passageway and combustion chamber concurrently and is used, and evaporative cooler is done quench tower and settling chamber concurrently and is used, simple structure, and the rapid cooling is effectual, can realize the automatic clearance of dust, carry and concentrated storage.
Description
Technical Field
The utility model belongs to the technical field of the dust removal of metallurgical industry, concretely relates to administer direct evaporative cooling device of electric stove dioxin.
Background
When primary flue gas generated in the production process of the electric furnace passes through the scrap steel preheating device, the primary flue gas can react with paint and other waste materials on the surface of the scrap steel to generate dioxin, a highly toxic substance. Therefore, the steel industry has clear requirements on dioxin emission. However, dioxin treatment usually adopts a combination of a combustion settling chamber and a quenching tower, and the quenching link has various embodiments, such as dividing wall type heat exchange described in CN201410551669 and CN201711486270, regenerative rapid cooling described in CN201110165286, and alkali liquor spray quenching described in CN 201710740785. However, the above quenching apparatus is complicated in structure, and a combustion settling chamber is provided upstream of the quenching apparatus.
SUMMERY OF THE UTILITY MODEL
In view of the problems of the device for treating dioxin in the combustion settling chamber and the quenching tower and overcoming the defects of the prior art, the device for treating dioxin in the electric furnace by using the direct evaporative cooling technology is provided, so that the generation of dioxin from the source is reduced, the structure is simplified, the energy consumption is reduced, and ash removal is convenient.
the utility model discloses a realize through following technical scheme:
The utility model provides a pair of administer direct evaporative cooling device of electric stove dioxin, include adiabatic flue, evaporative cooler and defeated ash storage facility that sets gradually outside electric stove scrap steel preheating device, it has two at least waste gas nozzles to import and distribute along adiabatic flue axial at adiabatic flue, and it has a plurality of two-medium spray gun to export and distribute along adiabatic flue circumference at adiabatic flue, be equipped with the exhanst gas outlet with dust pelletizing system pipe connection on the evaporative cooler.
And the expansion joint is an annular cavity structure made of heat-resistant stainless steel materials, fiber cotton is filled in the cavity, and the expansion joint is connected with an outlet of the heat-insulating flue and an inlet of the evaporative cooler by flanges.
Furthermore, the heat insulation flue is a steel flue gas channel with a refractory lining, and the refractory lining can adopt a combined structure of refractory bricks, heat insulation bricks and fiber blankets and can also adopt a combined structure of refractory castable and water-cooled tubes.
Further, the medium of the waste gas burner adopts one or a combination of a plurality of natural gas, combustion air and combustion oxygen; the double-medium spray gun is of a double-layer stainless steel structure, water is introduced into the central pipeline, and compressed air or nitrogen is introduced into the outer layer.
Furthermore, the waste gas burner can also be arranged on upstream equipment of the heat insulation flue, and the upstream equipment of the heat insulation flue is a scrap steel preheating device.
Further, the evaporative cooler comprises a cylinder straight section, a cylinder lower conical section arranged below the cylinder straight section, a fixed support used for installing the cylinder straight section and an inspection hole used for overhauling, wherein the cylinder straight section is of a vertical cylinder or square structure welded by steel plates.
Further, the ash conveying and storing facility consists of an ash cleaning device, a scraper ash conveyor, a bucket elevator and an ash storing bin which are connected in sequence, wherein the ash cleaning device is connected to the lower conical section of the barrel.
Furthermore, the lower cone section of the cylinder body can be used as an ash storage bin.
Further, the average flow velocity of the flue gas in the cooler is 3-4 m/s, the temperature of the flue gas at 800-900 ℃ is reduced to 200-250 ℃ within 2-3 s, and the flue gas rapidly crosses the temperature range of 300-500 ℃ for dioxin synthesis.
Further, the device also comprises a detection instrument and a temperature control system.
The utility model has the advantages that:
1. The utility model discloses an install the waste gas nozzle on the adiabatic flue, do flue gas passageway and combustion chamber usefulness concurrently, need not to set up the burning deposit room alone, and the rapid cooling link uses direct evaporative cooling technique, and evaporative cooler does quench tower and deposit room concurrently and uses, simple structure, and the rapid cooling is effectual.
2. The utility model discloses can realize automatic clearance, the transport and the concentrated storage of dust, need not to utilize the blowing out period to carry out the deashing.
3. the utility model discloses can reduce the dioxin and generate from the source, control the dioxin emission not more than 0.1ng-TEQ/Nm 3.
additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.
Drawings
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic structural view of a first embodiment of the apparatus of the present invention, wherein flue gas enters an evaporative cooler from the top downwards;
FIG. 2 is a schematic structural view of a second embodiment of the apparatus of the present invention, in which flue gas enters the evaporative cooler from the horizontal radial direction, and the lower cone section of the cylinder also serves as an ash storage bin;
Description of the labeling: 1-heat insulation flue, 2-waste gas burner, 3-double-medium spray gun, 4-expansion joint, 5-evaporative cooler, 51-cylinder straight section, 52-cylinder lower conical section, 53-fixed support, 54-inspection hole, 6-ash conveying and storing facility, 61-ash cleaning device, 62-scraper ash conveyer, 63-bucket elevator and 64-ash storing bin.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.
example 1:
As shown in figure 1, the utility model provides an use device of direct evaporative cooling technology for administering electric stove dioxin, including adiabatic flue 1, waste gas nozzle 2, two medium spray guns 3, expansion joint 4, evaporative cooler 5 and defeated ash storage facility 6, adiabatic flue 1 is a steel flue gas passageway of taking fire-resistant inside lining, connects electric stove steel scrap preheating device and evaporative cooler 5, waste gas nozzle 2 is installed on adiabatic flue 1, and the medium adopts one or more combination in natural gas, combustion-supporting air, the combustion-supporting oxygen, is used for lighting the combustible gas in the flue gas, mainly is CO, plays the heating effect when the flue gas temperature is lower, and waste gas nozzle quantity and medium consumption calculate according to the flue gas parameter and confirm, two medium spray guns 3 are bilayer structure, and the central pipeline leads to water, and outer compressed air or nitrogen gas of leading to, atomizes water with compressed air or nitrogen gas, the double-medium spray gun 3 is arranged on a heat insulation flue 1 at the upper part of an evaporative cooler, a plurality of spray guns are distributed along the circumferential direction, so that water mist covers the section of the whole barrel, the expansion joint 4 is arranged between the heat insulation flue and the evaporative cooler and is used for compensating heat displacement between the heat insulation flue 1 and the evaporative cooler 5, the evaporative cooler 5 comprises a barrel straight section 51 which is a vertical cylinder or a square structure welded by a steel plate, the sprayed water mist and high-temperature flue gas carry out heat and mass exchange in the barrel, the water mist is completely evaporated, the high-temperature flue gas is rapidly cooled, and the ash conveying and storing facility 6 comprises an ash cleaning device 61, a scraper ash conveyor 62, a bucket elevator 63 and an ash storage bin 64.
In the embodiment, the primary flue gas of the electric furnace from the scrap steel preheating device passes through the heat insulation flue 1, CO and other waste gas in the flue gas are ignited by a waste gas burner in the heat insulation flue, then the flue gas enters the evaporative cooler 5, the double-medium spray gun 3 sprays water mist on the high-temperature flue gas to play roles of fire extinguishing, temperature reduction and coarse dust removal, the flue gas with the temperature of 800-900 ℃ is cooled to 200-250 ℃ in 2-3 s, rapidly crosses a temperature range (namely 300-500 ℃) for dioxin synthesis, is discharged from the lower part of the cylinder and then enters a dust removal system pipeline, the purpose of reducing generation of dioxin from a source is achieved, and the emission amount of the dioxin is controlled to be less than or equal to 0.1ng-TEQ/Nm 3.
In this embodiment, the water mist is completely evaporated in a very short time, the flue gas is not condensed, unsaturated and does not wet the wall body, the coarse dust in the evaporative cooler 5 is dry ash, falls to the scraper ash conveyer 62, is conveyed to the ash storage bin 64 by the bucket elevator 63 for centralized storage, and is periodically conveyed and processed.
In this embodiment, the heat-insulating flue 1 is kept at a slope not less than 0.05, and slopes toward the evaporative cooler 5, so that the residue in the heat-insulating flue is guided to the evaporative cooler, thereby reducing the ash deposition in the heat-insulating flue.
In the embodiment, the expansion joint 4 is an annular cavity structure made of heat-resistant stainless steel materials, fiber cotton is filled in the cavity, and the cavity is connected with the outlet of the heat-insulating flue 1 and the inlet of the evaporative cooler 5 through flanges, so that the assembly, disassembly and maintenance are convenient.
In this embodiment, the flue gas enters the evaporative cooler 5 from the top downwards, and when the installation height is limited, the lower conical section 52 of the evaporative cooler can be arranged in a pit, and the coarse dust-removing ash is conveyed out and stored in a centralized manner through the ash conveying and storing facility 6.
In this embodiment, the evaporative cooler 5 is provided with a fixing support 53, the drum load is transmitted to the steel structure frame through the fixing support, and the evaporative cooler 5 is provided with an inspection hole 54 so as to be opened when debugging or maintenance is needed.
In this embodiment, the ash removal device 61 is disposed on the lower conical section 52 of the evaporative cooler, and the mode of cleaning ash by rapping or gas can be adopted to avoid hardening of the coarse dust on the inner wall thereof.
In the embodiment, the device also comprises a detection instrument and a temperature control system (not shown), wherein the opening and closing quantity of the waste gas burner 2 and the water flow of the dual-medium spray gun 3 are controlled according to the smelting working condition of the electric furnace, the primary flue gas flow and the temperature of each detection point, and the inlet/outlet temperature of the evaporative cooler 5 is controlled within a reasonable range.
example 2:
As shown in fig. 2, the present embodiment is different from the first embodiment in that: the flue gas radially gets into evaporative cooler 5 from the level, and overall installation height reduces, and evaporative cooler's barrel lower cone 52 uses as the storage ash storehouse concurrently, and bottom outlet connects gradually push-pull valve, star unloading valve and unloading pipe.
Example 3:
As a simplified solution of the first embodiment or the second embodiment, the present embodiment is different from the first embodiment or the second embodiment in that: the waste gas burner is arranged in the electric furnace waste steel preheating device and can be arranged on the heat insulation flue instead of the waste gas burner, or the waste gas burner is arranged on the electric furnace waste steel preheating device and the heat insulation flue simultaneously. The waste gas burner plays a beneficial role in preheating the scrap steel in the process of burning the waste gas or heating the flue gas, and can reduce the power consumption in the electric furnace smelting process. In contrast, the waste gas burner is arranged on the waste steel preheating device, the requirement on the fire resistance and heat insulation of the waste steel preheating device is stricter, and the inlet temperature fluctuation of the evaporative cooler is larger under the influence of the waste steel feeding process.
the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and it is obvious that those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The utility model provides a administer direct evaporative cooling device of electric stove dioxin, its characterized in that includes adiabatic flue (1), evaporative cooler (5) and defeated grey facility (6) of storing up that set gradually outside electric stove scrap steel preheating device, has two at least waste gas nozzles (2) in adiabatic flue import and along adiabatic flue axial distribution, has a plurality of two medium spray guns (3) in adiabatic flue export and along adiabatic flue circumference distribution, be equipped with the exhanst gas outlet with dust pelletizing system pipe connection on the evaporative cooler.
2. the direct evaporative cooling device for treating dioxin in electric furnaces according to claim 1, further comprising an expansion joint (4) installed between the heat-insulating flue and the evaporative cooler, wherein the expansion joint is an annular cavity structure made of heat-resistant stainless steel material, the cavity of the expansion joint is filled with fiber cotton, and the expansion joint is connected with the outlet of the heat-insulating flue and the inlet of the evaporative cooler by flanges.
3. The direct evaporative cooling device for treating dioxin in electric furnaces according to claim 1, wherein the heat-insulating flue is a steel flue gas channel with a refractory lining, and the refractory lining can adopt a combined structure of refractory bricks, heat-insulating bricks and fiber blankets and can also adopt a combined structure of refractory castable and water-cooling pipes.
4. The direct evaporative cooling device for treating dioxin in electric furnaces according to claim 1, wherein the medium of the waste gas burner adopts one or a combination of a plurality of natural gas, combustion air and combustion oxygen; the double-medium spray gun is of a double-layer stainless steel structure, water is introduced into the central pipeline, and compressed air or nitrogen is introduced into the outer layer.
5. The direct evaporative cooling apparatus for treating dioxin in electric furnaces according to claim 1, wherein the exhaust gas burner is further installed in an upstream facility of the heat-insulating flue, and the upstream facility of the heat-insulating flue is an electric furnace scrap preheating device.
6. The direct evaporative cooling device for treating dioxin in electric furnaces according to claim 1, wherein the evaporative cooler is composed of a cylinder straight section (51), a cylinder lower conical section (52) arranged below the cylinder straight section, a fixed support (53) for mounting the cylinder straight section, and an inspection hole (54) for inspection, wherein the cylinder straight section is of a vertical cylinder or square structure welded by steel plates.
7. The direct evaporative cooling device for treating dioxin in electric furnaces according to claim 6, wherein the ash conveying and storing facility consists of an ash cleaning device (61), a scraper ash conveyor (62), a bucket elevator (63) and an ash storing bin (64) which are connected in sequence, and the ash cleaning device is connected to the lower conical section of the barrel.
8. the direct evaporative cooling apparatus for treating dioxin in electric furnaces according to claim 7, wherein the lower cone section of the barrel can be used as a dust storage bin.
9. The direct evaporative cooling device for treating dioxin in electric furnaces according to claim 1, wherein the average flow velocity of flue gas in the cooler is 3-4 m/s, the temperature of the flue gas at 800-900 ℃ is reduced to 200-250 ℃ within 2-3 s, and the flue gas rapidly crosses a temperature range of 300-500 ℃ for dioxin synthesis.
10. The direct evaporative cooling apparatus for abatement of furnace dioxins as set forth in claim 1, further comprising a meter and a temperature control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920409614.3U CN209802111U (en) | 2019-03-28 | 2019-03-28 | Direct evaporative cooling device for treating dioxin in electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920409614.3U CN209802111U (en) | 2019-03-28 | 2019-03-28 | Direct evaporative cooling device for treating dioxin in electric furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209802111U true CN209802111U (en) | 2019-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920409614.3U Active CN209802111U (en) | 2019-03-28 | 2019-03-28 | Direct evaporative cooling device for treating dioxin in electric furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209802111U (en) |
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2019
- 2019-03-28 CN CN201920409614.3U patent/CN209802111U/en active Active
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