CN113277581A - Flash evaporation heat extraction water taking device for blast furnace slag flushing water - Google Patents
Flash evaporation heat extraction water taking device for blast furnace slag flushing water Download PDFInfo
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- CN113277581A CN113277581A CN202110415497.3A CN202110415497A CN113277581A CN 113277581 A CN113277581 A CN 113277581A CN 202110415497 A CN202110415497 A CN 202110415497A CN 113277581 A CN113277581 A CN 113277581A
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- water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- Hydrology & Water Resources (AREA)
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention belongs to the technical field of energy conservation and emission reduction, and particularly relates to a flash evaporation heat extraction water taking device for blast furnace slag flushing water, which comprises: the flash tank and the heat exchange tank are connected into the same tank body; the flash tank is provided with a hyperbolic wall surface, and a water inlet pipe is arranged at the top end of the hyperbolic wall surface; a liquid removing plate is arranged above the liquid collecting plate; a fixed rod is arranged below the spiral blade, and the spiral blade is arranged on the fixed rod through a shaft sleeve; the outlet of the flash tank is a cold slag water outlet, wherein a slag slurry pump is arranged; a plurality of heat pipes are arranged in the heat pipe exchanger, and the free ends of the heat pipes extend into the tank body of the heat exchange tank; an air extraction opening is arranged on the side wall of the heat exchange tank, and a vacuum pump is installed in the air extraction opening; a condensed water outlet at the opening end of the heat exchange tank, wherein a condensed water pump is arranged; the invention solves the problems of blockage, abrasion and corrosion of slag flushing water in the dividing wall type heat exchanger and poor equipment reliability. The device can reliably separate steam and liquid, fully utilize heat energy, and simultaneously condensate water can be used as process water, thereby saving water resources.
Description
Technical Field
The invention relates to the technical field of energy conservation and emission reduction, in particular to a flash evaporation heat extraction water taking device for blast furnace slag flushing water.
Background
At present, most of blast furnace slag washing water waste heat recovery mainly adopts a dividing wall type heat exchanger mode, and because slag washing water contains various impurities, the mode easily causes blockage, abrasion and corrosion of the heat exchanger, and the equipment reliability is poor. Therefore, a new technology for recovering the waste heat of the slag flushing water is urgently needed.
Disclosure of Invention
The invention aims to provide a flash evaporation heat extraction water taking device for blast furnace slag flushing water, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a hot water intake device is carried in blast furnace slag flushing water flash distillation which characterized in that: the flash tank and the heat exchange tank are connected into the same tank body;
the flash tank is provided with a hyperbolic wall surface, and a water inlet pipe is arranged at the top end of the hyperbolic wall surface; a liquid removing plate is arranged above the hyperbolic wall surface; a fixed rod is arranged below the hyperbolic wall surface, and the helical blade is arranged on the fixed rod through a shaft sleeve;
the outlet of the flash tank is a cold slag water outlet which is a tapered flow passage, wherein a slag slurry pump is arranged;
a plurality of heat pipes are arranged in the heat pipe exchanger, and the free ends of the heat pipes extend into the tank body of the heat exchange tank; an air exhaust port is arranged on the side wall of the heat exchange tank, and a vacuum pump is installed at the air exhaust port;
the opening end of the heat exchange tank is provided with a condensed water outlet which is a tapered runner, and a condensed water pump is arranged in the tapered runner.
The flash evaporation heat extraction water taking device for the blast furnace slag flushing water comprises two or more water inlet pipes which are uniformly arranged on the hyperbolic wall surface, and the water inlet pipes are arranged on the hyperbolic wall surface 10 in a downward inclination angle of 45 degrees and a left inclination angle of 45 degrees.
The flash evaporation heat extraction water taking device for the blast furnace slag flushing water comprises 3 water inlet pipes.
The flash evaporation heat extraction water taking device for the blast furnace slag flushing water is characterized in that 6 to 12 spiral blades are arranged; the rotation angle is set to 30 to 60 degrees.
The hot water intake device is extracted to blast furnace sluicing water flash distillation as above, wherein, this inlet tube is connected to the sediment pond through the sediment stuff pump, and cold sediment water outlet is connected to the wastewater disposal basin.
Compared with the prior art, the invention has the beneficial effects that: according to the flash evaporation heat extraction water taking device for the blast furnace slag flushing water, provided by the invention, the slag flushing water is introduced into the flash evaporation tower in a negative pressure state in a flash evaporation mode, a flash evaporation process is carried out, a large amount of negative pressure flash evaporation steam is generated, the clean negative pressure flash evaporation steam passes through equipment such as a heat exchanger or a heat pump, condensation and heat release are completed, the recycling of heat can be realized, and the water consumption of the whole unit can be effectively reduced due to the water vapor formed by condensation; therefore, the invention solves the problems of blockage, abrasion and corrosion of the slag flushing water in the dividing wall type heat exchanger and poor equipment reliability. The device can reliably separate steam and liquid, fully utilize heat energy, and simultaneously condensate water can be used as process water, thereby saving water resources.
Drawings
FIG. 1 is a schematic diagram of the present invention.
In the figure: 1 heat pipe heat exchanger, 2 heat pipes, 3 vacuum pumps, 41 slurry pumps, 42 condensate pumps, 5 fixed rods, 6 helical blades, 7 liquid removing plates, 8 flash tanks, 9 heat exchange tanks, 10 hyperbolic wall surfaces, 11 water inlet pipes, 12 cold slag water outlets and 13 condensate water outlets.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, the invention provides a blast furnace slag flushing water flash evaporation heat extraction water taking device, a flash evaporation tank 8 and a heat exchange tank 9 are connected through a pipeline to form a same tank body with an n-shaped structure, the flash evaporation tank 8 plays a flash evaporation role, the heat exchange tank 9 plays a condensation heat exchange role, the flash evaporation and the heat exchange are carried out in the same integral tank body through the ingenious design, and energy loss caused by pipeline transportation of steam is reduced.
The flash tank 8 is provided with a hyperbolic wall surface 10, three equal-diameter water inlet pipes 11 are uniformly arranged at the top end of the hyperbolic, the water inlet pipeline is provided with a downward inclination angle and a left inclination (or right inclination) angle, preferably 30-70 degrees, and the downward inclination angle is 45 degrees, and the left inclination angle is 45 degrees, so that the water inlet pipeline is arranged on the hyperbolic wall surface 10, and the arrangement reduces the impact of slag water on the wall surface; the slag flushing water enters through the water inlet pipe 11, under the combined action of the water inlet pipeline and the hyperbolic wall surface, the water enters to form impact atomization to descend or spirally descend along the hyperbolic curve of the tank body, the retention time of the slag flushing water in the tank body of the flash tank 8 is prolonged through the design, and a part of slag water can be atomized, so that the flash evaporation efficiency is increased.
The liquid removing plate 7 is arranged above the hyperbolic wall surface 10, and as the slag flushing water is corrosive, in order to prevent the liquid removing plate 7 from being corroded, the liquid removing plate 7 is manufactured by adopting a process of lining polypropylene (PP) and Polytetrafluoroethylene (PTFE) in a steel body, and has high structural strength and corrosion resistance. When the gas phase passes through the liquid removal plate 7 with the polytetrafluoroethylene filler, large liquid drops are intercepted and return to the flash tank under the action of gravity, and the gas phase continues to enter the condenser for condensation.
A fixed rod 5 is arranged below the hyperbolic wall surface 10, and two ends of the fixed rod 5 are welded on the wall of the flash tank 8; the plurality of helical blades 6 are arranged on the fixed rod 5 through shaft sleeves, and the helical blades 6 are connected through a rotating rod. The slag flushing water can be in a spiral descending state under the action of the hyperbolic wall surface 10, pressure is generated to reduce the flash evaporation efficiency, the spiral state of the slag flushing water is successfully destroyed by the spiral blade 6, the slag flushing water is dispersed, the atomization effect of the slag flushing water and the detention time of the slag flushing water in the flash tank 8 tank body are increased, and the flash evaporation efficiency is increased.
The helical blades 6 are arranged in 6 to 12 pieces; the rotation angle is set to 30 to 60 degrees, preferably 35 degrees. In one embodiment of the present invention, 6 helical blades 6 are arranged at equal intervals, the rotation angle is 40 °, and the installation mode is as follows: the helical blade 6 is welded on the shaft sleeve, and the shaft sleeve is sleeved on the fixed rod 5 and fixed by the fixed nut.
The design of the hyperbolic wall surface ensures the uniformity of the wall surface pressure on one hand, and meanwhile, the strength and the deformation resistance of the curved surface structure are very strong, so that the damage of slag flushing water to the wall surface can be reduced, and the service life of the tank body is prolonged; on one hand, the turbulent flow of the inlet water can be reduced, the detention time of the slag flushing water in the tank can be increased, and the flash evaporation efficiency can be increased. Liquid does tangential motion along the circumferential direction through the hyperboloid structure under the action of gravity acceleration, and this part of liquid can beat on the rotating blade, because liquid has radial acceleration, can produce the atomizing effect when beating on the blade. Meanwhile, the spiral blades are pushed to rotate, so that the slag flushing water is dispersed, the residence time of the slag flushing water is prolonged, and the flash evaporation efficiency is improved.
The export of flash tank 8 is cold sediment water export 12, cold sediment water export 12 is the tapered runner, wherein sets up the sediment stuff pump 41, and the sluicing water inlet tube 11 is connected to the sediment pond through the sediment stuff pump, and cold sediment water exit linkage to wastewater disposal basin. The tapered flow passage can increase the flow speed of the cold slag water and prevent solid particles in the slag water from depositing in the pipeline.
The flash steam enters the heat exchange tank 9.
A plurality of heat pipes 2 are arranged in the heat pipe exchanger 1, the free ends of the heat pipes 2 extend into the tank body of the heat exchange tank 9, and cooling water exchanges heat with flash steam through the heat pipes 2 in the heat pipe exchanger 1.
An air exhaust port is arranged on the side wall of the heat exchange tank 9, and a vacuum pump 3 is installed at the air exhaust port.
The open end of the heat exchange tank 9 is a condensed water outlet 13 which is a tapered flow passage, and a condensed water pump 42 is arranged in the tapered flow passage.
When the slag washing device works, slag washing water taken out of the slag water pool is sent into the tank body of the flash tank 8 by the slurry pump 41, and the slag washing water entering the tank body flows downwards along the hyperbolic curve of the tank body or forms a small part of impact atomization descending under the action of the angle of the water inlet and the hyperbolic wall surface. The slag flushing water which is not atomized pushes the helical blade 6 to rotate, so that the detention time of the slag flushing water in the tank is prolonged, and the flash evaporation efficiency is increased.
The flash steam is condensed on the surface of the heat pipe 2 of the heat pipe exchanger 1 to release heat, and the condensed liquid drops of the flash steam fall into the lower part of the heat exchange tank 9 under the action of gravity and are sent out through a condensate pump 42. The condensed water can be used as process water for other links.
The heat released by the flash steam is sent to the heat pipe exchanger 1 by the heat pipe 2, and the cold water at the inlet is heated into hot water.
A steam extraction port is arranged below the heat pipe 2, and the non-condensable gas generated in the flash evaporation process is extracted out of the tank body by a vacuum pump 3 to maintain the negative pressure environment in the tank body. The slag flushing water passing through the bottom filter tank cannot generate steam under normal pressure, and the vacuum pump 3 is arranged to maintain the negative pressure environment of the tank body so that the slag flushing water boils under the condition of low pressure of 100 ℃ to generate steam, thereby achieving the purpose of heat extraction.
After the flushing slag water is subjected to flash evaporation, the temperature is greatly reduced, the flushing slag water falls into the lower part of the cavity of the flash tank 8 and is sent out to a slag water pool by a slag pump 41.
The flash evaporation heat extraction water taking device for the blast furnace slag flushing water liquid, provided by the invention, has the advantages of simple system and strong universality, and can achieve the purpose of deep waste heat recovery by recovering the heat of the slag flushing water and improve the energy utilization efficiency; a large amount of water vapor is extracted from the blast furnace slag flushing water, and condensed water formed after the water vapor is condensed has excellent water quality and can be used as process water supplement to reduce water consumption; meanwhile, the flash steam of the blast furnace slag flushing water and the heat exchange medium exchange heat efficiently, the structure is compact, and the reliability of the device is high. The damage of a single heat pipe does not influence the overall operation and the overall heat exchange effect of the heat pipe exchanger in the operation process.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a hot water intake device is carried in blast furnace slag flushing water flash distillation which characterized in that: the flash tank and the heat exchange tank are connected into the same tank body;
the flash tank is provided with a hyperbolic wall surface, and a water inlet pipe is arranged at the top end of the hyperbolic wall surface; a liquid removing plate is arranged above the hyperbolic wall surface; a fixed rod is arranged below the hyperbolic wall surface, and the helical blade is arranged on the fixed rod through a shaft sleeve;
the outlet of the flash tank is a cold slag water outlet which is a tapered flow passage, wherein a slag slurry pump is arranged;
a plurality of heat pipes are arranged in the heat pipe exchanger, and the free ends of the heat pipes extend into the tank body of the heat exchange tank; an air exhaust port is arranged on the side wall of the heat exchange tank, and a vacuum pump is installed at the air exhaust port;
the opening end of the heat exchange tank is provided with a condensed water outlet which is a tapered runner, and a condensed water pump is arranged in the tapered runner.
2. The flash evaporation heat extraction water taking device for the blast furnace slag flushing water according to claim 1, wherein two or more water inlet pipes are uniformly arranged on the hyperbolic wall surface, and the water inlet pipes are arranged on the hyperbolic wall surface 10 in a downward inclination manner by 45 degrees and a left inclination manner by 45 degrees.
3. The flash evaporation heat extraction water intake device for blast furnace slag flushing water according to claim 2, wherein the number of the water inlet pipes is 3.
4. The flash evaporation heat extraction water taking device for the blast furnace slag flushing water according to claim 1, wherein the spiral blades are arranged into 6 to 12 pieces; the rotation angle is set to 30 to 60 degrees.
5. The blast furnace slag washing water flash evaporation hot water extraction device according to claim 1, wherein the water inlet pipe is connected to the slag pool through a slag slurry pump, and the cold slag water outlet is connected to the waste water pool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110415497.3A CN113277581A (en) | 2021-04-18 | 2021-04-18 | Flash evaporation heat extraction water taking device for blast furnace slag flushing water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110415497.3A CN113277581A (en) | 2021-04-18 | 2021-04-18 | Flash evaporation heat extraction water taking device for blast furnace slag flushing water |
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| Publication Number | Publication Date |
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| CN113277581A true CN113277581A (en) | 2021-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110415497.3A Pending CN113277581A (en) | 2021-04-18 | 2021-04-18 | Flash evaporation heat extraction water taking device for blast furnace slag flushing water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116121472A (en) * | 2023-04-14 | 2023-05-16 | 常州中源工程技术有限公司 | Waste heat recovery system for slag flushing water of blast furnace |
-
2021
- 2021-04-18 CN CN202110415497.3A patent/CN113277581A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116121472A (en) * | 2023-04-14 | 2023-05-16 | 常州中源工程技术有限公司 | Waste heat recovery system for slag flushing water of blast furnace |
| CN116121472B (en) * | 2023-04-14 | 2023-09-19 | 常州中源工程技术有限公司 | Waste heat recovery system for slag flushing water of blast furnace |
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