CN219693222U - Metallurgical kiln exhaust-heat boiler exhaust steam recovery unit - Google Patents
Metallurgical kiln exhaust-heat boiler exhaust steam recovery unit Download PDFInfo
- Publication number
- CN219693222U CN219693222U CN202321215497.XU CN202321215497U CN219693222U CN 219693222 U CN219693222 U CN 219693222U CN 202321215497 U CN202321215497 U CN 202321215497U CN 219693222 U CN219693222 U CN 219693222U
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- China
- Prior art keywords
- branch pipe
- exhaust
- liquid inlet
- communicated
- flash tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000011084 recovery Methods 0.000 title claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 38
- 239000002918 waste heat Substances 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000010865 sewage Substances 0.000 claims abstract description 14
- 239000002699 waste material Substances 0.000 claims abstract description 12
- 230000000737 periodic effect Effects 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 238000004321 preservation Methods 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 229920000742 Cotton Polymers 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 238000003723 Smelting Methods 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model discloses a waste steam recovery device of a metallurgical furnace waste heat boiler, which comprises a flash tank (1), a liquid inlet branch pipe (2), an exhaust branch pipe (3), a drainage branch pipe (4) and a water delivery tank (5); the middle part of the flash tank is provided with a liquid inlet (1 a), a sewage inlet (1 b), a periodic sewage inlet (1 c), an exhaust port (1 d) at the top and a sewage outlet (1 e) at the bottom; one end of the liquid inlet branch pipe is communicated with the flash tank through a liquid inlet, the other end of the liquid inlet branch pipe is communicated with an inlet pipe of the steam dilatation device, the other end of the exhaust branch pipe is communicated with the flash tank through an exhaust port, the other end of the exhaust branch pipe is communicated with the low-temperature waste heat recovery pipe, and the other end of the drain branch pipe is communicated with the flash tank through a drain outlet, and the other end of the drain branch pipe is communicated with the water delivery tank; and stop valves (6) are arranged on the liquid inlet branch pipe, the exhaust branch pipe and the drain branch pipe. The utility model recycles the heat energy of the exhaust steam of the boiler, reduces the production cost, prolongs the service life of surrounding equipment and pipelines, and eliminates the noise pollution generated when the exhaust steam is discharged.
Description
Technical Field
The utility model belongs to the technical field of metallurgical furnace energy recovery, and particularly relates to a waste steam recovery device of a metallurgical furnace waste heat boiler.
Background
Flue gas generated by high-temperature smelting of a metallurgical furnace flows through a waste heat boiler, is cooled to about 325 ℃ and enters a dust collection system up to 345 ℃, and is discharged to a flue gas treatment working section (in the process, the waste heat boiler is in a negative pressure state) by a high-temperature smoke exhaust fan. In the process that the high-temperature flue gas flows through the waste heat boiler, the waste heat boiler conducts heat with the high-temperature smelting flue gas through radiation, convection and heat conduction through a forced water circulation system, absorbs heat in the flue gas, heats the water to generate steam with certain pressure and temperature, and sends the steam to a power generation workshop for power generation, and waste steam with the temperature of about 150 ℃ generated by a blowdown flash vessel is directly emptied, so that the blowdown rate of the boiler is about 5%.
In order to improve the quality of waste heat boiler steam and water, the waste heat boiler discharges part of the furnace water with the temperature of about 250 ℃ into a pollution discharge expansion vessel through a continuous and periodical pollution discharge device, and waste steam is generated and directly discharged into the atmosphere.
At present, waste steam generated by capacity expansion of a blowdown flash vessel, namely high-temperature exhaust steam, is directly discharged into the atmosphere, and the following defects exist:
the high-temperature exhaust steam is directly discharged by emptying, so that heat energy and water resources are greatly wasted;
noise pollution is generated during high-temperature exhaust steam emission, and physical and mental health of people is affected;
the water drops after the high-temperature exhaust steam condensation are continuously attached to surrounding equipment and pipelines to cause corrosion of the equipment and the pipelines, so that the service life of the equipment is shortened;
the high-temperature exhaust steam discharged in winter can condense at the equipment frame and the outer wall of the factory building to form ice hanging, and the road ground around the factory building forms a layer of firm ice, so that potential safety hazards such as people injury caused by ice hanging falling and personnel sliding and falling injury exist.
Disclosure of Invention
The utility model aims to solve the defects of the prior art, and provides a waste steam recovery device of a metallurgical furnace waste heat boiler, which is additionally arranged between an inlet pipe of a steam expansion vessel and a low-temperature waste heat recovery pipe, so as to recycle waste steam heat energy of the boiler, reduce production cost, save water resources, prolong the service lives of surrounding equipment and pipelines and eliminate noise pollution generated when the waste steam is exhausted.
The technical scheme adopted by the utility model is as follows:
a waste steam recovery device of a metallurgical furnace waste heat boiler comprises a flash tank, a liquid inlet branch pipe, an exhaust branch pipe, a drainage branch pipe and a water delivery tank; the middle part of the flash tank is provided with a liquid inlet, a sewage discharge inlet, a periodic sewage discharge inlet, an exhaust port at the top and a sewage discharge outlet at the bottom; one end of the liquid inlet branch pipe is communicated with the flash tank through a liquid inlet, the other end of the liquid inlet branch pipe is communicated with an inlet pipe of the steam dilatation device, the other end of the exhaust branch pipe is communicated with the flash tank through an exhaust port, the other end of the exhaust branch pipe is communicated with the low-temperature waste heat recovery pipe, and the other end of the drain branch pipe is communicated with the flash tank through a drain outlet, and the other end of the drain branch pipe is communicated with the water delivery tank; and the liquid inlet branch pipe, the exhaust branch pipe and the drain branch pipe are all provided with stop valves. The waste heat boiler water enters the device through the sewage inlet, or the waste heat boiler water regularly (1 time per shift) enters the device through the regular sewage inlet 1c, so that the pressure of the waste heat boiler water is increased to the low-pressure steam grid-connected pressure of 0.5MPa in the device, the low-pressure steam grid-connected pressure is integrated into a low-pressure pipe network system of a company, and the condensed water is discharged to a sulfuric acid circulating water pool.
Further, the stop valve on the drain branch pipe is connected with two bypass valves in parallel, and a drain valve is arranged between the two bypass valves.
Further, two stop valves are respectively arranged on the liquid inlet branch pipe, the exhaust branch pipe and the drain branch pipe in series.
Further, a pressure gauge and a flowmeter are arranged on the liquid inlet branch pipe.
Further, the outer walls of the liquid inlet branch pipe and the exhaust branch pipe are coated with heat preservation components.
Further, the heat preservation assembly comprises heat preservation cotton and galvanized iron sheets which are sequentially arranged from inside to outside, and the galvanized iron sheets are fixed on the heat preservation cotton.
Further, the flash tank is a vertical cylinder, and elliptical sealing heads are arranged at the top and the bottom of the flash tank.
The utility model has the beneficial effects that:
the existing process is not changed. The device is additionally arranged between the inlet pipe of the steam expansion vessel and the low-temperature waste heat recovery pipe in the energy recovery process of the metallurgical furnace, the low-pressure steam subjected to flash evaporation by the flash evaporation tank enters the low-temperature waste heat recovery pipe for recovery and use, and condensed water is discharged into the water delivery tank, so that the production cost is reduced, and water resources are saved; the oxygen corrosion of the pipeline exposed in the environment is reduced, the service lives of surrounding equipment and the pipeline are effectively prolonged, and the noise pollution generated during the emptying process is eliminated; the outer walls of the liquid inlet branch pipe and the exhaust branch pipe are respectively coated with a heat preservation component, so that the recycling of heat energy is improved; and the pressure gauge and the flowmeter are arranged on the liquid inlet branch pipe, so that the running stability of the system is improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2 is a schematic structural view of the heat insulation assembly of the present utility model.
Description of the embodiments
The utility model is further elucidated below in connection with the drawing and the examples of the specification.
As shown in figure 1, the exhaust steam recovery device of the metallurgical furnace waste heat boiler comprises a flash tank 1, wherein the flash tank can be a vertical cylinder, and elliptical sealing heads are arranged at the top and the bottom of the flash tank. A liquid inlet branch pipe 2, an exhaust branch pipe 3, a drainage branch pipe 4 and a water delivery tank 5; the middle part of the flash tank is provided with a liquid inlet 1a, a sewage inlet 1b, a periodic sewage inlet 1c, an exhaust port 1d at the top and a sewage outlet 1e at the bottom; one end of the liquid inlet branch pipe is communicated with the flash tank through a liquid inlet, the other end of the liquid inlet branch pipe is communicated with the inlet pipe A of the steam flash tank, the exhaust branch pipe is communicated with the flash tank through an exhaust port, the other end of the exhaust branch pipe is communicated with the low-temperature waste heat recovery pipe B, and the drain branch pipe is communicated with the flash tank through a drain outlet, and the other end of the drain branch pipe is communicated with the water delivery tank; and the liquid inlet branch pipe, the exhaust branch pipe and the drainage branch pipe are respectively provided with a stop valve 6, low-pressure steam subjected to flash evaporation in the flash tank enters the low-temperature waste heat recovery pipe for recycling, and condensed water is discharged into the water delivery tank, so that the production cost is reduced, and water resources are saved. In order to increase the stability of the system and avoid leakage of the system, two stop valves can be respectively arranged on the liquid inlet branch pipe, the exhaust branch pipe and the drainage branch pipe in series; the stop valve on the drain branch pipe can also be connected with two bypass valves 7 in parallel, and a drain valve 8 is arranged between the two bypass valves. The pressure gauge 9 and the flowmeter 10 are arranged on the liquid inlet branch pipe, the actual pressure and flow in the field are monitored, staff can compare and lag with the set value according to the fed back numerical value, the state in the flash tank is controlled by adjusting the opening and closing of each stop valve, the liquid level and the pressure of the system are ensured to be in a controllable range, and the running stability, safety and reliability of the system are improved.
As shown in fig. 2, the outer walls of the liquid inlet branch pipe and the air outlet branch pipe can be coated with heat insulation components, the heat insulation components comprise heat insulation cotton 11 and galvanized iron sheets 12 which are sequentially arranged from inside to outside, the galvanized iron sheets are fixed on the heat insulation cotton, the outer sides of the galvanized iron sheets can be fixed by galvanized iron wires 13, and the recovery of heat energy is increased. After the utility model is put into use, the waste heat boiler of a zinc roasting plant is continuously and periodically discharged with high-temperature boiler water (250 ℃ according to 2 t/h) and introduced into a flash evaporation device, low-pressure steam (less than or equal to 0.5 MPa) is generated and connected to a heat supply network for use, and the recovery rate of exhaust steam can reach more than 99 percent, thereby reducing the production cost and saving energy.
The working principle and the operation process of the utility model are as follows:
the existing process is not changed. The utility model is arranged between the inlet pipe of the steam expansion vessel and the low-temperature waste heat recovery pipe, condensed water carrying high-temperature exhaust steam in the inlet pipe of the steam expansion vessel enters the flash tank through the liquid inlet branch pipe for gas-liquid separation, low-pressure steam after flash evaporation is discharged from the exhaust port at the top of the flash tank in an upward flow mode, enters the low-temperature waste heat recovery pipe through the exhaust branch pipe for recovery and use, and condensed water generated by the flash tank is discharged from the drain outlet at the bottom of the flash tank and is recovered through the drain branch pipe to the water delivery tank.
The above embodiments are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope defined by the claims of the present utility model without departing from the design spirit of the present utility model.
Claims (7)
1. The exhaust steam recovery device of the metallurgical furnace waste heat boiler is characterized by comprising a flash tank (1), a liquid inlet branch pipe (2), an exhaust branch pipe (3), a drainage branch pipe (4) and a water delivery tank (5); the middle part of the flash tank is provided with a liquid inlet (1 a), a sewage inlet (1 b), a periodic sewage inlet (1 c), an exhaust port (1 d) at the top and a sewage outlet (1 e) at the bottom; one end of the liquid inlet branch pipe is communicated with the flash tank through a liquid inlet, the other end of the liquid inlet branch pipe is communicated with an inlet pipe of the steam dilatation device, the other end of the exhaust branch pipe is communicated with the flash tank through an exhaust port, the other end of the exhaust branch pipe is communicated with the low-temperature waste heat recovery pipe, and the other end of the drain branch pipe is communicated with the flash tank through a drain outlet, and the other end of the drain branch pipe is communicated with the water delivery tank; and stop valves (6) are arranged on the liquid inlet branch pipe, the exhaust branch pipe and the drain branch pipe.
2. The exhaust steam recovery device of the metallurgical furnace waste heat boiler according to claim 1, wherein the stop valve on the drainage branch pipe is connected with two bypass valves (7) in parallel, and a drainage valve (8) is arranged between the two bypass valves.
3. The exhaust steam recovery device of the metallurgical furnace waste heat boiler according to claim 1, wherein the liquid inlet branch pipe, the exhaust branch pipe and the drain branch pipe are respectively provided with two stop valves in series.
4. The waste steam recovery device of the metallurgical furnace waste heat boiler according to claim 1, wherein a pressure gauge (9) and a flowmeter (10) are arranged on the liquid inlet branch pipe.
5. The waste steam recovery device of the metallurgical furnace waste heat boiler according to any one of claims 1 to 4, wherein the outer walls of the liquid inlet branch pipe and the exhaust branch pipe are coated with heat preservation components.
6. The waste steam recovery device of the metallurgical furnace waste heat boiler according to claim 5, wherein the heat preservation component comprises heat preservation cotton (11) and galvanized iron sheet (12) which are sequentially arranged from inside to outside, and the galvanized iron sheet is fixed on the heat preservation cotton.
7. The exhaust steam recovery device of a metallurgical furnace waste heat boiler according to claim 1, wherein the flash tank is a vertical cylinder, and elliptical sealing heads are arranged at the top and the bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321215497.XU CN219693222U (en) | 2023-05-19 | 2023-05-19 | Metallurgical kiln exhaust-heat boiler exhaust steam recovery unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321215497.XU CN219693222U (en) | 2023-05-19 | 2023-05-19 | Metallurgical kiln exhaust-heat boiler exhaust steam recovery unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219693222U true CN219693222U (en) | 2023-09-15 |
Family
ID=87965274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321215497.XU Active CN219693222U (en) | 2023-05-19 | 2023-05-19 | Metallurgical kiln exhaust-heat boiler exhaust steam recovery unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219693222U (en) |
-
2023
- 2023-05-19 CN CN202321215497.XU patent/CN219693222U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |