CN212270141U - Blast furnace slag water quenching waste steam waste heat recovery device - Google Patents
Blast furnace slag water quenching waste steam waste heat recovery device Download PDFInfo
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- CN212270141U CN212270141U CN202020700448.5U CN202020700448U CN212270141U CN 212270141 U CN212270141 U CN 212270141U CN 202020700448 U CN202020700448 U CN 202020700448U CN 212270141 U CN212270141 U CN 212270141U
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Abstract
The utility model discloses a blast furnace slag shrend waste steam waste heat recovery device, including the shrend groove, first heat exchanger and second heat exchanger, bottom in the shrend groove is provided with strains water cavity and quenching sediment chamber, it is provided with the slag runner to tilt up on the lateral wall in quenching sediment chamber, the upper and lower of slag runner respectively is provided with a spray pipe, upper portion in the shrend groove is provided with evaporation heat exchanger, the drain pipe intercommunication has the hot-water tank, the shell side export of first heat exchanger and the shell side import intercommunication of second heat exchanger, the shell side export and the evaporation heat exchanger intercommunication of second heat exchanger, evaporation heat exchanger has connected gradually steam heat accumulator and power generation facility, one side in shrend groove is provided with the three-phase separator, the steam outlet of three-phase separator passes through the tube side import intercommunication of pipeline and second heat exchanger, the tube side export of second heat exchanger has dust collector through the pipeline connection. The utility model discloses waste heat recovery is effectual, and waste heat utilization rate is high, and the operation is stable, and energy saving and emission reduction has apparent economic value and social value.
Description
Technical Field
The utility model relates to the technical field of steel making, in particular to a blast furnace slag water quenching waste steam waste heat recovery device.
Background
In recent years, the development of the iron and steel industry in China is rapid, the yield of steel is increased at a high speed, according to 2019 data, the annual pig iron yield of China is over 8 hundred million tons, the annual blast furnace slag yield reaches 2.4-4.8 million tons calculated by 0.3-0.6 t slag produced per 1t pig iron, the tapping temperature of the blast furnace slag is about 1500 ℃, the heat contained in 1t blast furnace slag is equivalent to 64kg standard coal, and the heat carried by the annual blast furnace slag is equivalent to 0.15-0.31 million tons of standard coal, so that the recovery and utilization of the waste heat of the blast furnace slag become the key points of the energy saving and consumption reduction of the industry in China, particularly the iron and steel industry.
At present, the blast furnace slag treatment mainly adopts a water quenching process, and the recovery and the utilization of the slag waste heat can be divided into two categories, namely the waste heat utilization of the slag flushing waste water; and secondly, the waste heat of the slag flushing waste steam is utilized. The reason why the utilization of the waste heat of the high-temperature slag water quenching is frequently failed in the past is that the hardness hazard of slag flushing water is neglected, and the more important reason is that the waste heat is mistakenly considered to be in water, actually the opposite is true, no matter how much low-temperature water is adopted to flush slag for water quenching, a large amount of water vapor is generated at the moment when water is contacted with the high-temperature slag, most of heat is taken away, and the heat taken away by the water is only a small part, so that the research focus needs to be changed from the field of utilization of the waste heat of the slag flushing waste water to the field of utilization of the waste heat of the slag flushing waste gas in order to improve the utilization rate of. Therefore, it is objectively needed to develop a blast furnace slag water quenching waste steam waste heat recovery device which has the advantages of good waste heat recovery effect, high waste heat utilization rate, stable operation, energy conservation and emission reduction.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a blast furnace slag shrend exhaust steam waste heat recovery device that waste heat recovery is effectual, and waste heat utilization is high, and the operation is stable, energy saving and emission reduction.
The utility model aims at realizing the method, which comprises a water quenching tank, a first heat exchanger and a second heat exchanger, wherein one side of the bottom in the water quenching tank is vertically provided with a filtering baffle plate, the filtering baffle plate divides the lower part in the water quenching tank into a water filtering cavity and a quenching slag cavity, the volume of the quenching slag cavity is larger than that of the water filtering cavity, the bottom of the water filtering cavity is provided with a drain pipe, the bottom of the quenching slag cavity is provided with a slag discharge pipe, the side wall of the quenching slag cavity is obliquely provided with a slag runner, the lower end of the slag runner extends into the middle part of the quenching slag cavity, the upper part of the slag runner is provided with a first water spray pipe, the lower part of the slag runner is provided with a second water spray pipe, the first water spray pipe and the slag runner are arranged in parallel, the first water spray pipe is provided with a plurality of water spray ports along the length direction at intervals, the water outlet direction of the water spray ports faces the slag runner, the outer side of the water quenching tank is provided with a water, an evaporation heat exchanger is arranged in the water quenching tank above the first water spray pipe.
The outlet end intercommunication of drain pipe has the hot-water tank, be provided with moisturizing pipe and outlet pipe on the hot-water tank, the outlet pipe communicates with the tube side import of first heat exchanger, communicate through the back flow between the tube side export of first heat exchanger and the inlet tube, the shell side import of first heat exchanger is provided with the cold water input tube, the shell side export of first heat exchanger passes through the shell side import intercommunication of hot water conveyer pipe with the second heat exchanger, the shell side export of second heat exchanger passes through the water inlet intercommunication of pipeline with the evaporation heat exchanger, the delivery port of evaporation heat exchanger has connected gradually steam heat accumulator and power generation facility through the pipeline, power generation facility's comdenstion water export passes through pipeline and back flow intercommunication.
One side of shrend groove is provided with three-phase separator, and the steam inlet of three-phase separator passes through the pipeline and communicates with the top in shrend groove, and the bottom of three-phase separator is provided with the conveyer belt, and the discharge end of conveyer belt stretches into the inside in quenching sediment chamber, and the outlet of three-phase separator passes through pipeline and hot-water tank intercommunication, and the steam vent of three-phase separator passes through the pipeline and communicates with the tube side import of second heat exchanger, and the tube side play mouth of second heat exchanger has dust collector through the pipe connection.
Furthermore, the bottom of the quenching slag cavity is obliquely arranged, the lower end of the quenching slag cavity faces the direction of the water filtering cavity, and the slag discharging pipe is located at the lowest position of the bottom of the quenching slag cavity.
Furthermore, a crushing roller is arranged in the quenching cavity below the slag discharging end of the slag runner, and the water outlet direction of the second water spraying pipe faces to the upper part of the crushing roller.
Furthermore, a filter layer is obliquely arranged on the upper portion in the hot water tank, the water outlet end of the water outlet pipe is communicated with the top of the hot water tank, and the water replenishing pipe and the water outlet pipe are located below the filter layer.
Furthermore, a water outlet of the steam heat accumulator is communicated with the hot water conveying pipe through a communicating pipe.
Furthermore, the dust removal device is of a spraying type dust removal structure, a water outlet of the dust removal device is connected with a water purifier, and a water outlet of the water purifier is communicated with the cold water input pipe through a pipeline.
The utility model discloses in the use, blast furnace slag gets into the quenching chamber from the slag ditch, utilize first spray pipe to spout into cooling water simultaneously and cool off the slag, the heat steam that produces exchanges heat with the medium among the evaporation heat exchanger earlier, carry the triphase separator from the top of water quenching groove afterwards, the heat steam separates into gas, hot water and slag in the triphase separator, hot water input hot-water tank, the slag returns the quenching chamber, gas then carries the tube side of second heat exchanger, remove dust and discharge after the heat transfer in the second heat exchanger again, the hot water that above-mentioned water quenching in-process produced gets into the drainage chamber through filtering the baffle, get into the hot-water tank from the drain pipe of drainage chamber bottom, then get into the tube side of first heat exchanger and participate in the heat transfer, carry the quenching chamber again after the heat transfer cooling and participate in the water quenching cooling operation of slag, input cold water in the shell side of first heat exchanger, cold water gets into the shell side of second heat exchanger after the first heat transfer intensifies, and performing secondary heat exchange and temperature rise in the shell pass of the second heat exchanger, then performing tertiary heat exchange and temperature rise after entering the evaporation heat exchanger, and enabling the formed superheated steam to enter the power generation device for steam power generation. The utility model provides a cold water is through first heat exchanger, second heat exchanger and evaporation heat exchanger progressively heating back, can produce stable steam and provide power generation facility and generate electricity, secondly, the hot water that the shrend produced flows back to the quenching sediment chamber recycle after the heat transfer cooling, the waste heat in fully having retrieved shrend in-process steam waste and the waste water, waste heat recovery is effectual in the whole operation process, waste heat utilization rate is high, the operation is stable, energy saving and emission reduction has apparent economic value and social value.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
in the figure: 1-a water quenching tank, 2-a first heat exchanger, 3-a second heat exchanger, 4-a filtering partition plate, 5-a water filtering cavity, 6-a quenching slag cavity, 7-a water discharging pipe, 8-a slag discharging pipe, 9-a slag melting groove, 10-a first water spraying pipe, 11-a second water spraying pipe, 12-a water spraying port, 13-a water inlet pipe, 14-an evaporative heat exchanger, 15-a hot water tank, 16-a water replenishing pipe, 17-a water outlet pipe, 18-a backflow pipe, 19-a cold water input pipe, 20-a hot water conveying pipe, 21-a steam heat accumulator, 22-a power generation device, 23-a three-phase separator, 24-a conveying belt, 25-a dust removal device, 26-a crushing roller, 27-a filtering layer, 28-a communicating pipe and 29-a water purifier.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited in any way, and any changes or improvements based on the present invention are all within the protection scope of the present invention.
As shown in figure 1, the utility model comprises a water quenching tank 1, a first heat exchanger 2 and a second heat exchanger 3, the first heat exchanger 2 and the second heat exchanger 3 are shell-and-tube heat exchangers with existing structures, when in use, the first heat exchanger 2 and the second heat exchanger 3 can be selected according to the heat exchange requirement and other parameters, one side of the bottom in the water quenching tank 1 is vertically provided with a filtering baffle 4, the filtering baffle 4 is used for blocking the slag and only allowing water to pass through, the filtering baffle 4 divides the lower part in the water quenching tank 1 into a water filtering cavity 5 and a quenching slag cavity 6, the volume of the quenching slag cavity 6 is larger than that of the water filtering cavity 5, the bottom of the water filtering cavity 5 is provided with a drain pipe 7, the bottom of the quenching slag cavity 6 is provided with a slag discharge pipe 8, the inclined side wall of the quenching slag cavity 6 is provided with a slag runner 9, the lower end of the slag runner 9 extends into the middle part of the quenching slag cavity 6, a first water spray pipe 10 is arranged above the slag runner, first spray pipe 10 and slag ditch 9 parallel arrangement, be provided with a plurality of water jet 12 along length direction interval on the first spray pipe 10, the play water direction of water jet 12 is towards slag ditch 9, the outside in shrend groove 1 is provided with inlet tube 13, the end of intaking of first spray pipe 10 and second spray pipe 11 all communicates with inlet tube 13, be provided with evaporating heat exchanger 14 in the shrend groove 1 of first spray pipe 10 top, evaporating heat exchanger 14 is current structure, heat transfer structures such as optional coiled pipe, coil pipe, its usage is to let in water in evaporating heat exchanger 14, form superheated steam after the heat of hot gas in water quenching groove 1 is absorbed to water.
The water outlet end of the water outlet pipe 7 is communicated with a hot water tank 15, the hot water tank 15 is provided with a water supplementing pipe 16 and a water outlet pipe 17, the water outlet pipe 17 is communicated with a tube side inlet of the first heat exchanger 2, a tube side outlet of the first heat exchanger 2 is communicated with a water inlet pipe 13 through a return pipe 18, a shell side inlet of the first heat exchanger 2 is provided with a cold water input pipe 19, a shell side outlet of the first heat exchanger 2 is communicated with a shell side inlet of the second heat exchanger 3 through a hot water delivery pipe 20, a shell side outlet of the second heat exchanger 3 is communicated with a water inlet of the evaporation heat exchanger 14 through a pipeline, a water outlet of the evaporation heat exchanger 14 is sequentially connected with a steam heat accumulator 21 and a power generation device 22 through pipelines, the steam heat accumulator 21 and the power generation device 22 are existing devices, wherein the steam heat accumulator 21 is used for storing steam and continuously providing steam, In conventional steam power generation equipment such as a generator and a condenser, a condensate outlet of the power generation device 22 is connected to the return pipe 18 through a pipeline.
The water quenching device comprises a water quenching tank 1, a three-phase separator 23 is arranged on one side of the water quenching tank 1, the three-phase separator 23 is an existing device and is used for separating moisture and solid slag mixed in hot steam, a steam inlet of the three-phase separator 23 is communicated with the top of the water quenching tank 1 through a pipeline, a conveying belt 24 is arranged below the three-phase separator 23, a discharge end of the conveying belt 24 extends into a quenching slag cavity 6, a water outlet of the three-phase separator 23 is communicated with a hot water tank 15 through a pipeline, a steam outlet of the three-phase separator 23 is communicated with a tube side inlet of a second heat exchanger 3 through a pipeline, a tube side outlet of the second heat exchanger 3 is connected with a dust removal device 25 through a pipeline, and the dust removal device 25 is an existing dust removal device and is used for removing toxic and harmful substances in the gas and preventing environmental pollution caused.
In the use process of the utility model, blast furnace slag enters the quenching cavity 6 from the slag ditch 9, and simultaneously, the first spray pipe 10 is utilized to spray cooling water to cool the slag, the generated hot steam firstly exchanges heat with the medium in the evaporation heat exchanger 14, and then is conveyed to the three-phase separator 23 from the top of the water quenching tank 1, the hot steam is separated into gas, hot water and slag in the three-phase separator 23, the hot water is input into the hot water tank 15, the slag returns to the quenching cavity 6, the gas is conveyed to the tube pass of the second heat exchanger 3, the dust is removed and discharged after the heat exchange in the second heat exchanger 3, the hot water generated in the water quenching process enters the water filtering cavity 5 through the filtering partition plate 4, enters the hot water tank 15 from the drain pipe 7 at the bottom of the water filtering cavity 5, then enters the tube pass of the first heat exchanger 2 to participate in the heat exchange, the water quenching cooling operation with the slag is conveyed to the quenching cavity 6 again after the, cold water is input into the shell pass of the first heat exchanger 2, enters the shell pass of the second heat exchanger 3 after first heat exchange and temperature rise, carries out second heat exchange and temperature rise in the shell pass of the second heat exchanger 3, then enters the evaporation heat exchanger 14 for third heat exchange and temperature rise, forms superheated steam, and then enters the power generation device 22 for steam power generation. The utility model provides a first heat exchanger 2, the medium temperature that is used for heating cold water among second heat exchanger 3 and the evaporation heat exchanger 14 is increasingly high, cold water is through first heat exchanger 2, second heat exchanger 3 and evaporation heat exchanger 14 progressively heat the back, can produce stable steam and provide power generation facility 22 for electricity generation, secondly, the hot water that the shrend produced flows back to the recycle in the quenching sediment chamber 6 after the heat transfer cooling, the waste heat in steam and the waste water of the in-process shrend of fully having retrieved, waste heat recovery is effectual among the whole operation process, waste heat utilization rate is high, the operation is stable, energy saving and emission reduction effect is obvious.
The bottom of the quenching slag cavity 6 is obliquely arranged, the lower end of the quenching slag cavity faces the direction of the water filtering cavity 5, and the slag discharging pipe 8 is positioned at the lowest position of the bottom of the quenching slag cavity 6. The bottom that the slope set up, hot water after the convenient water quenching on the one hand in time flows to straining water cavity 5, provides the space of cooling slag for the cold water that newly gets into slag quenching chamber 6, prevents that hot water from gathering in slag quenching chamber 6 and influencing the cooling efficiency of slag, and on the other hand is for discharging totally with the slag of cooling.
A crushing roller 26 is arranged in the quenching slag cavity 6 below the slag discharging end of the slag melting groove 9, and the water discharging direction of the second water spraying pipe 11 faces the upper part of the crushing roller 26. Crushing roller 26 is current structure, can set up drive arrangement in the outside of water quenching groove 1 and drive crushing roller 26 rotatory, and after the blast-furnace slag got into quenching chamber 6 from slag ditch 9, fall on crushing roller 26, crushing roller 26 can be broken with bold slag, and the cooling water that spouts from second spray pipe 11 simultaneously cools off the slag after the breakage, improves the water quenching effect of slag, reduces the temperature of slag fast.
The upper part in the hot water tank 15 is obliquely provided with a filter layer 27, the water outlet end of the water outlet pipe 7 is communicated with the top part of the hot water tank 15, and the water replenishing pipe 16 and the water outlet pipe 17 are positioned below the filter layer 27. The aquatic after the shrend can contain certain impurity inevitable, and these impurity get into first heat exchanger 2 after, lead to first heat exchanger 2 to block up easily, reduce first heat exchanger 2's heat transfer effect, have consequently set up filter layer 27, filter the impurity of hot-water.
The water outlet of the steam heat accumulator 21 is communicated with the hot water delivery pipe 20 through a communication pipe 28. The steam accumulator 21 stores steam, part of the steam is condensed into water, the condensed water contains a large amount of heat, the temperature of the condensed water is still high, and heat loss is caused if the condensed water is directly discharged, so that the condensed water is conveyed to the second heat exchanger 3 through the communicating pipe 28 to be subjected to heat exchange, and the heat loss can be prevented.
The dust removing device 25 is a spraying dust removing structure, a water outlet of the dust removing device 25 is connected with a water purifier 29, and a water outlet of the water purifier 29 is communicated with the cold water input pipe 19 through a pipeline. The dust collector 25 adopting the spray type dust removal structure is characterized in that because hot steam is in the process of contacting with cooling water, residual heat can be absorbed by the cooling water, on one hand, heat in the hot steam is absorbed, the emission temperature of the hot steam is reduced, the heat loss is prevented, on the other hand, absorbed heat water can also enter the first heat exchanger 2 to participate in heat exchange, and the heat exchange efficiency of the first heat exchanger 2 is improved.
Claims (6)
1. The utility model provides a blast furnace slag shrend waste steam waste heat recovery device which characterized in that: comprises a water quenching tank (1), a first heat exchanger (2) and a second heat exchanger (3), wherein a filtering partition plate (4) is vertically arranged on one side of the bottom in the water quenching tank (1), the lower part in the water quenching tank (1) is partitioned into a water filtering cavity (5) and a quenching slag cavity (6) by the filtering partition plate (4), the volume of the quenching slag cavity (6) is larger than that of the water filtering cavity (5), a drain pipe (7) is arranged at the bottom of the water filtering cavity (5), a slag discharge pipe (8) is arranged at the bottom of the quenching slag cavity (6), a slag runner (9) is obliquely arranged on the side wall of the quenching slag cavity (6), the lower end of the slag runner (9) extends into the middle part of the quenching slag cavity (6), a first water spray pipe (10) is arranged above the slag runner (9), a second water spray pipe (11) is arranged below the slag runner (9), and the first water spray pipe (10) is arranged in parallel with the slag runner (9), a plurality of water spray nozzles (12) are arranged on the first water spray pipe (10) at intervals along the length direction, the water outlet direction of the water spray nozzles (12) faces the slag melting groove (9), a water inlet pipe (13) is arranged on the outer side of the water quenching groove (1), the water inlet ends of the first water spray pipe (10) and the second water spray pipe (11) are communicated with the water inlet pipe (13), and an evaporation heat exchanger (14) is arranged in the water quenching groove (1) above the first water spray pipe (10);
the water outlet end of the water outlet pipe (7) is communicated with a hot water tank (15), a water replenishing pipe (16) and a water outlet pipe (17) are arranged on the hot water tank (15), the water outlet pipe (17) is communicated with the tube side inlet of the first heat exchanger (2), the tube side outlet of the first heat exchanger (2) is communicated with the water inlet pipe (13) through a return pipe (18), a shell side inlet of the first heat exchanger (2) is provided with a cold water input pipe (19), a shell side outlet of the first heat exchanger (2) is communicated with a shell side inlet of the second heat exchanger (3) through a hot water conveying pipe (20), a shell side outlet of the second heat exchanger (3) is communicated with a water inlet of the evaporation heat exchanger (14) through a pipeline, a water outlet of the evaporation heat exchanger (14) is sequentially connected with a steam heat accumulator (21) and a power generation device (22) through pipelines, and a condensed water outlet of the power generation device (22) is communicated with a return pipe (18) through a pipeline;
one side of water quenching groove (1) is provided with three-phase separator (23), and the steam inlet of three-phase separator (23) passes through the pipeline and communicates with the top of water quenching groove (1), the below of three-phase separator (23) is provided with conveyer belt (24), and the discharge end of conveyer belt (24) stretches into the inside in quenching sediment chamber (6), the outlet of three-phase separator (23) passes through pipeline and hot-water tank (15) intercommunication, and the steam vent of three-phase separator (23) passes through the pipeline and communicates with the tube side import of second heat exchanger (3), the tube side export of second heat exchanger (3) has dust collector (25) through the pipe connection.
2. The blast furnace slag water quenching waste steam waste heat recovery device according to claim 1, characterized in that the bottom of the quenching cavity (6) is arranged obliquely, the lower end of the quenching cavity faces the direction of the water filtering cavity (5), and the slag discharging pipe (8) is positioned at the lowest position of the bottom of the quenching cavity (6).
3. The blast furnace slag water quenching waste steam waste heat recovery device according to claim 1, characterized in that a crushing roller (26) is arranged in the quenching cavity (6) below the slag tapping end of the slag runner (9), and the water outlet direction of the second water spray pipe (11) faces the upper part of the crushing roller (26).
4. The blast furnace slag water quenching waste gas waste heat recovery device according to claim 1, characterized in that a filter layer (27) is obliquely arranged at the upper part in the hot water tank (15), the water outlet end of the water outlet pipe (7) is communicated with the top of the hot water tank (15), and the water replenishing pipe (16) and the water outlet pipe (17) are positioned below the filter layer (27).
5. The blast furnace slag water quenching waste steam waste heat recovery device according to claim 1, characterized in that a water outlet of the steam heat accumulator (21) is communicated with the hot water delivery pipe (20) through a communication pipe (28).
6. The blast furnace slag water quenching waste gas waste heat recovery device according to claim 1, characterized in that the dust removal device (25) is a spray type dust removal structure, a water outlet of the dust removal device (25) is connected with a water purifier (29), and a water outlet of the water purifier (29) is communicated with the cold water input pipe (19) through a pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020700448.5U CN212270141U (en) | 2020-04-30 | 2020-04-30 | Blast furnace slag water quenching waste steam waste heat recovery device |
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| CN202020700448.5U CN212270141U (en) | 2020-04-30 | 2020-04-30 | Blast furnace slag water quenching waste steam waste heat recovery device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113274838A (en) * | 2021-06-01 | 2021-08-20 | 珠海东亮智能技术有限公司 | Gas-water separation device of medical molecular sieve oxygen generation equipment |
| CN115235253A (en) * | 2022-07-19 | 2022-10-25 | 南京青述节能技术有限公司 | Rotational flow method shrend slag waste heat recovery device |
-
2020
- 2020-04-30 CN CN202020700448.5U patent/CN212270141U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113274838A (en) * | 2021-06-01 | 2021-08-20 | 珠海东亮智能技术有限公司 | Gas-water separation device of medical molecular sieve oxygen generation equipment |
| CN115235253A (en) * | 2022-07-19 | 2022-10-25 | 南京青述节能技术有限公司 | Rotational flow method shrend slag waste heat recovery device |
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