CN110976532A - Strip steel acid pickling production line, waste heat utilization system thereof and heat hot water supply method - Google Patents
Strip steel acid pickling production line, waste heat utilization system thereof and heat hot water supply method Download PDFInfo
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- CN110976532A CN110976532A CN201911322265.2A CN201911322265A CN110976532A CN 110976532 A CN110976532 A CN 110976532A CN 201911322265 A CN201911322265 A CN 201911322265A CN 110976532 A CN110976532 A CN 110976532A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 268
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 117
- 239000010959 steel Substances 0.000 title claims abstract description 117
- 238000005554 pickling Methods 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000002918 waste heat Substances 0.000 title claims abstract description 10
- 239000002253 acid Substances 0.000 title description 8
- 238000004140 cleaning Methods 0.000 claims abstract description 68
- 238000011084 recovery Methods 0.000 claims abstract description 56
- 230000001502 supplementing effect Effects 0.000 claims abstract description 20
- 239000013505 freshwater Substances 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims description 14
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 4
- 239000003546 flue gas Substances 0.000 claims description 4
- 239000003345 natural gas Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 239000013589 supplement Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000008234 soft water Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
- B21B45/0275—Cleaning devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Water Supply & Treatment (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention provides a strip steel pickling production line, a waste heat utilization system thereof and a heat hot water supply method, wherein the strip steel pickling production line comprises the following steps: the boiler and a heat exchanger connected with the boiler; the recovery device is connected with the heat exchanger, and condensed water and secondary steam output by the heat exchanger are input into the recovery device; the water replenishing device is connected with the recovery device and is used for replenishing new water to the recovery device; the condensed water and the secondary steam input by the heat exchanger and the fresh water supplemented by the water supplementing device are mixed into hot water in the recovery device; one part of the hot water in the recovery device is sent to the strip steel cleaning device, and the other part of the hot water is used for replenishing water for the boiler. The invention solves the technical problems of large water consumption of a boiler and large energy waste in the strip steel pickling production process.
Description
Technical Field
The invention relates to the field of cold-rolled pickled strips, in particular to a strip steel pickling production line, a waste heat utilization system and a heat hot water supply method thereof.
Background
In the field of cold rolling and pickling of strips, soft water in a steam boiler heating furnace generates steam, and acid liquor and strip steel are heated by the steam so as to accelerate the pickling speed of the strip steel. In the production process, a large amount of secondary steam is generated and discharged to the outside, and meanwhile, a steam boiler also needs to supplement a large amount of soft water, so that the problems of large water consumption of the boiler and large energy waste are solved.
Disclosure of Invention
The invention aims to provide a strip steel pickling production line, a waste heat utilization system thereof and a heat hot water supply method, so as to solve the technical problems of high boiler water consumption and large energy waste in the strip steel pickling production process.
The above object of the present invention can be achieved by the following technical solutions:
the invention provides a strip steel pickling production line, which comprises:
the boiler and a heat exchanger connected with the boiler;
the recovery device is connected with the heat exchanger, and condensed water and secondary steam output by the heat exchanger are input into the recovery device;
the water replenishing device is connected with the recovery device and is used for replenishing new water to the recovery device;
the condensed water and the secondary steam input by the heat exchanger and the fresh water supplemented by the water supplementing device are mixed into hot water in the recovery device; one part of the hot water in the recovery device is sent to a strip steel cleaning device, and the other part of the hot water is used for replenishing water for the boiler.
In a preferred embodiment, the recovery device comprises a pressure-bearing water tank, a boiler water supply pump set and a strip steel cleaning pump set, wherein the boiler water supply pump set is connected with the pressure-bearing water tank, the pressure-bearing water tank is provided with a condensed water and secondary steam inlet which is connected with the heat exchanger, the boiler water supply pump set is used for supplying hot water in the pressure-bearing water tank to the boiler, and the strip steel cleaning pump set is used for supplying hot water in the pressure-bearing water tank to the strip steel cleaning device; the water supplementing device is connected with the pressure-bearing water tank.
In a preferred embodiment, a nozzle is arranged in the pressure-bearing water tank, and the water replenishing device is connected with the nozzle.
In a preferred embodiment, the pressure-bearing water tank is connected with a pressure tank.
In a preferred embodiment, a flow regulating valve and a flow meter are connected to the pipeline of the water replenishing device.
In a preferred embodiment, the strip pickling line includes a dryer for drying the strip cleaned by the strip cleaning apparatus.
In a preferred embodiment, the boiler comprises a first stage heating means for heating with high temperature flue gas, and a second stage heating means for heating with natural gas.
The invention provides a waste heat utilization system of a strip steel pickling production line, which comprises:
the recovery device comprises a pressure-bearing water tank, a boiler water supply pump set and a strip steel cleaning pump set, wherein the boiler water supply pump set and the strip steel cleaning pump set are connected with the pressure-bearing water tank; the strip steel cleaning pump set is used for supplying the hot water in the pressure-bearing water tank to a strip steel cleaning device in the strip steel pickling production line;
and the water replenishing device is connected with the pressure-bearing water tank and used for replenishing new water to the pressure-bearing water tank.
The invention provides a heat hot water supply method for a strip steel pickling production line, which comprises the following steps:
step S10, providing steam by the boiler, and conveying the steam to the heat exchanger;
step S20, the heat exchanger sends the generated condensed water and secondary steam to a recovery device;
step S30, the water replenishing device replenishing the recovery device with fresh water; the fresh water supplemented by the water supplementing device, the condensed water and the secondary steam input by the heat exchanger are mixed into hot water in the recovery device; one part of the hot water in the recovery device is sent to a strip steel cleaning device, and the other part of the hot water is used for supplementing water for the boiler.
In a preferred embodiment, the water replenishing means replenishes fresh water by an amount equal to the amount of hot water supplied from the recovery means to the strip cleaning apparatus.
The invention has the characteristics and advantages that:
according to the strip steel pickling production line, steam is sent to the heat exchanger by the boiler, the heat exchanger heats strip steel and acid liquor by using the heat of the steam, and the strip steel pickling speed is accelerated; the condensed water and the secondary steam output by the heat exchanger are conveyed to a recovery device and are mixed with new water supplemented by a water supplementing device to form hot water, one part of the hot water in the recovery device is sent to a strip steel cleaning device, and the other part of the hot water is supplemented by the boiler. Therefore, the recycling of condensed water and secondary steam output by the heat exchanger is realized, one part of the condensed water and the secondary steam provides hot water for the strip steel cleaning device, and the other part of the condensed water and the secondary steam circularly flows back to the boiler to replenish water for the boiler, so that heat is recovered, and the steam emission and the new water consumption in the strip steel pickling production process are reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart of a strip steel pickling production line provided by the invention;
FIG. 2 is a schematic structural view of a recycling apparatus in the strip steel pickling line shown in FIG. 1;
FIG. 3 is a schematic diagram of a hot water supply method for supplying heat to a strip steel pickling line according to the present invention;
FIG. 4 is a schematic flow diagram of an open condensate pickling line system.
The reference numbers illustrate:
1. a boiler; 2. a heat exchanger; 3. a recovery device; 4. a dryer; 5. a strip steel cleaning device;
6. a water replenishing device; 61. a flow regulating valve; 62. a flow meter;
7. a pressure-bearing water tank; 71. a condensed water and secondary steam inlet;
8. a nozzle; 9. a pressure tank;
10. a boiler water supply pump set; 11. a strip steel cleaning pump set.
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.
Referring to fig. 4, fig. 4 is a schematic flow diagram of an open condensate pickling line system, after steam generated by a boiler enters a graphite heat exchanger, part of the steam is changed into condensate in the graphite heat exchanger, and part of the steam exists in the form of low-pressure steam (i.e. secondary steam); the comdenstion water and the steam of graphite heat exchanger output are carried to open condensate water jar, and the hot water that open condensate water jar produced is partly carried to the rinsing groove for wash belted steel, simultaneously, open condensate water jar still can produce a large amount of unit steam and arrange heat and unit waste water outward, and it is big to cause waste water treatment work load, has wasted water resource and energy.
Example one
The invention provides a strip steel pickling line, as shown in figure 1, the strip steel pickling line comprises: the system comprises a boiler 1, a heat exchanger 2, a recovery device 3 and a water replenishing device 6, wherein the heat exchanger 2 is connected with the boiler 1, the recovery device 3 is connected with the heat exchanger 2, and condensed water and secondary steam output by the heat exchanger 2 are input into the recovery device 3; the water replenishing device 6 is connected with the recovery device 3, and the water replenishing device 6 is used for replenishing new water to the recovery device 3; the condensed water and the secondary steam input by the heat exchanger 2 and the fresh water supplemented by the water supplementing device 6 are mixed into hot water in the recovery device 3; the hot water in the recovery device 3 is partly sent to the strip cleaning device 5 and partly used for replenishing the boiler 1 with water.
According to the strip steel pickling production line, a boiler 1 sends steam to a heat exchanger 2, the heat exchanger 2 is connected with strip steel pickling equipment, and the heat exchanger 2 heats strip steel and acid liquor by using the heat of the steam so as to accelerate the strip steel pickling speed; the condensed water and the secondary steam output by the heat exchanger 2 are conveyed to the recovery device 3 and mixed with new water supplemented by the water supplementing device 6 to form hot water, one part of the hot water in the recovery device 3 is sent to the strip steel cleaning device 5, and the other part of the hot water is supplemented for the boiler 1. Therefore, the recycling of condensed water and secondary steam output by the heat exchanger 2 is realized, one part of the condensed water and the secondary steam provides hot water for the strip steel cleaning device 5, and the other part of the condensed water and the secondary steam circularly flows back to the boiler 1 to replenish water for the boiler, thereby not only recovering heat, but also reducing steam emission and water consumption in the strip steel pickling production process. The production line realizes a closed condensate recovery system and has the advantages of low wastewater treatment cost and high investment return rate.
As shown in fig. 1 and 2, the recovery device 3 is used for mixing the condensed water and the secondary steam input from the heat exchanger 2 with the fresh water input from the water replenishing device 6, and is provided with an output port connected to the boiler 1 and an output port connected to the strip steel cleaning device 5, so as to send the mixed hot water to the boiler 1 and the strip steel cleaning device 5, respectively. In one embodiment of the present invention, the recovery apparatus 3 includes a pressure-bearing water tank 7, a boiler water supply pump unit 10 connected to the pressure-bearing water tank 7, and a strip steel cleaning pump unit 11, the pressure-bearing water tank 7 is provided with a condensed water and secondary steam inlet 71 connected to the heat exchanger 2, the boiler water supply pump unit 10 is used for supplying hot water in the pressure-bearing water tank 7 to the boiler 1, and the strip steel cleaning pump unit 11 is used for supplying hot water in the pressure-bearing water tank 7 to the strip steel cleaning apparatus 5; the water supplementing device 6 is connected with the pressure-bearing water tank 7. When the strip steel acid washing production line works, condensed water and secondary steam output by the heat exchanger 2 enter the pressure-bearing water tank 7 through the condensed water and secondary steam inlet 71 and are mixed with new water input by the water supplementing device 6 in the pressure-bearing water tank 7. The boiler feed water pump unit 10 supplies power to feed the hot water in the pressure-bearing water tank 7 to the boiler 1, and controls the feed rate so as to be balanced with the water consumption required for the steam generation of the boiler 1. The strip steel cleaning pump set 11 provides power to convey hot water in the pressure bearing water tank 7 to the strip steel cleaning device 5, and controls the conveying speed so as to conveniently supply proper amount of hot water for strip steel cleaning and ensure the cleaning effect.
Preferably, a nozzle 8 is provided in the pressure-bearing water tank 7, the water replenishing device 6 is connected to the nozzle 8, and fresh water is sprayed into the pressure-bearing water tank 7 through the nozzle 8 so as to be in contact with secondary steam entering through the condensed water and the secondary steam inlet 71 to absorb heat.
As shown in fig. 2, the pressure tank 9 is connected to the pressure-bearing water tank 7, and the pressure tank 9 is used for stabilizing the pressure in the pressure-bearing water tank 7, which is beneficial to maintaining the stability of the steam amount in the pressure-bearing water tank 7 and stably outputting hot water to the outside.
Furthermore, a flow regulating valve 61 and a flow meter 62 are connected to the pipeline of the water replenishing device 6, and the amount of water replenished is conveniently controlled through the flow regulating valve 61 so as to maintain the pressure in the bearing water tank 7; the flow meter 62 may count the amount of make-up water. Furthermore, a steam monitoring device is arranged in the pressure water tank 7, and the amount of water supplement required for absorbing steam can be checked by a computer system according to the steam amount, so that the amount of water supplement can be adjusted by the flow regulating valve 61, and quantitative water supplement can be performed on the system.
The strip steel cleaning device 5 comprises a wringing roller, and the cleaning effect on the strip steel is determined by the wringing roller and the water supply amount of the strip steel cleaning device 5. The set water supply amount is equal to the water supply amount required by the strip steel cleaning, so that the strip steel cleaning device can be stably supplied with water according to the required water supply amount, and the damage condition of the wringing roller can be judged in advance through the strip steel cleaning effect. When the band steel cleaning quality can not meet the requirements, whether the wringing roller is replaced or not is reminded, and the water supply and the wringing roller of the band steel cleaning device 5 are monitored and maintained through the flowmeter 62. Specifically, when the amount of water supplied to the pressure-bearing water tank 7 is set to be equal to the amount of water supplied to the strip steel cleaning device 5, if the conductivity value of the rinsing tank in the strip steel cleaning device 5 exceeds the standard or the surface quality of the strip steel after being cleaned is poor, it can be known that the strip steel cleaning quality does not meet the requirements. In some embodiments, the strip cleaning apparatus 5 is equipped with a computer maintenance system that can provide recommendations as to whether the squeeze rolls should be replaced.
Preferably, the flow control valve 61 is an automatic control valve, and after the steam generated by the boiler meets the temperature required for heating the acid liquor, the steam is changed into condensed water and secondary steam, and is mixed with fresh water supplemented by the water supplementing device 6 to be changed into hot water of about 80 degrees, and the set water supplementing quantity is equal to the water supply quantity of the cleaning tank. If the variety and the specification of the cleaning strip steel are changed, the water supplementing amount required by the cleaning strip steel is changed, the steam amount generated by the boiler is changed, the water supplementing amount and the water supply amount of the strip steel cleaning device are automatically adjusted under the control of a computer maintenance system, and the water amounts of the water supplementing amount and the water supply amount are kept equal.
In an embodiment of the present invention, the boiler 1 is a waste heat boiler, and includes a first stage heating device and a second stage heating device, the first stage heating device uses high temperature flue gas to heat, and the second stage heating device uses natural gas to heat, so as to recycle heat of high temperature flue gas generated in other production processes of strip steel, and improve energy utilization rate. The heat exchanger 2 adopts a graphite heat exchanger to improve the utilization efficiency of heat in steam.
As shown in fig. 1, the strip steel pickling line includes a dryer 4, and the dryer 4 is used to dry the strip steel cleaned by the strip steel cleaning apparatus. Preferably, the dryer 4 employs a gas dryer.
Example two
The invention provides a waste heat utilization system of a strip steel pickling production line, which comprises a recovery device 3 and a water replenishing device 6; the recovery device 3 comprises a pressure-bearing water tank 7, a boiler water supply pump unit 10 and a strip steel cleaning pump unit 11 which are connected with the pressure-bearing water tank 7, wherein the pressure-bearing water tank 7 is provided with a condensed water and secondary steam inlet 71; the boiler water supply pump unit 10 is used for supplying hot water in the pressure-bearing water tank 7 to a steam boiler in a strip steel pickling production line, and the strip steel cleaning pump unit 11 is used for supplying hot water in the pressure-bearing water tank 7 to a strip steel cleaning device 5 in the strip steel pickling production line; the water replenishing device 6 is connected with the pressure-bearing water tank 7 and is used for replenishing new water to the pressure-bearing water tank 7.
The waste heat utilization system can be applied to the strip steel pickling production line and can also be used for reforming the existing strip steel pickling production line, and a condensed water and secondary steam inlet 71 on the pressure-bearing water tank 7 is connected with the heat exchanger 2; the boiler water supply pump set 10 is connected with the boiler 1, the strip steel cleaning pump set 11 is connected with the strip steel cleaning device 5, the secondary steam output by the heat exchanger 2 is recycled, one part of the secondary steam provides hot water for the strip steel cleaning device 5, the other part of the secondary steam circularly flows back to the boiler 1 to replenish water for the boiler 1, heat is recycled, and steam emission and water consumption in the strip steel pickling production process are reduced.
EXAMPLE III
The invention provides a hot water supply method for heat of a strip steel pickling production line, which comprises the following steps of:
step S10, providing steam by the boiler 1, and conveying the steam to the heat exchanger 2;
step S20, the heat exchanger 2 sends the generated condensed water and secondary steam to the recovery device 3;
step S30, the water replenishing device 6 replenishes the recovery device 3 with fresh water; the new water supplemented by the water supplementing device 6 and the condensed water and the secondary steam input by the heat exchanger 2 are mixed into hot water in the recovery device 3; the hot water in the recovery device 3 is partially sent to the strip steel cleaning device 5, and the other part is supplemented with water for the boiler 1.
The heat hot water supply method is applied to a strip steel pickling line which comprises a strip steel pickling device and a strip steel cleaning device 5. The steam is conveyed to the heat exchanger 2, the heat exchanger 2 provides heat for the strip steel pickling equipment by utilizing the steam, and the strip steel and the acid liquor are heated so as to accelerate the strip steel pickling speed. The condensed water and the secondary steam output by the heat exchanger 2 enter the recovery device 3 firstly and are mixed with the supplemented new water to form hot water, and then, on one hand, the water is supplemented for the boiler 1 to recover heat and water resources, and on the other hand, hot water is provided for strip steel cleaning. Preferably, the temperature of the hot water for strip cleaning is about 80 °.
In an embodiment of the invention, the water replenishing device 6 replenishes the amount of the fresh water equal to the amount of the hot water supplied to the strip steel cleaning device 5 by the recovery device 3, because the steam generated by the boiler 1 enters the recovery device 3 after passing through the heat exchanger 2 and is mixed with the fresh water of the water replenishing device 6, part of the mixed hot water is used for cleaning the strip steel, and the rest of the mixed hot water flows back to the boiler 1, thus realizing zero water replenishing of the boiler 1, improving the recycling efficiency of water resources and heat, and being beneficial to ensuring the stable pressure in a water supply system. Preferably, the water supply amount of the water replenishing device 6 is 1.5-4 cubic meters per hour.
The above description is only a few embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention according to the disclosure of the application document without departing from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a belted steel pickling production line which characterized in that includes:
the boiler and a heat exchanger connected with the boiler;
the recovery device is connected with the heat exchanger, and condensed water and secondary steam output by the heat exchanger are input into the recovery device;
the water replenishing device is connected with the recovery device and is used for replenishing new water to the recovery device;
the condensed water and the secondary steam input by the heat exchanger and the fresh water supplemented by the water supplementing device are mixed into hot water in the recovery device;
one part of the hot water in the recovery device is sent to a strip steel cleaning device, and the other part of the hot water is used for replenishing water for the boiler.
2. The strip steel pickling production line according to claim 1, wherein the recovery device comprises a pressure-bearing water tank, a boiler water supply pump set and a strip steel cleaning pump set, the boiler water supply pump set is connected with the pressure-bearing water tank, the pressure-bearing water tank is provided with a condensed water and secondary steam inlet which is connected with the heat exchanger, the boiler water supply pump set is used for supplying hot water in the pressure-bearing water tank to the boiler, and the strip steel cleaning pump set is used for supplying hot water in the pressure-bearing water tank to the strip steel cleaning device; the water supplementing device is connected with the pressure-bearing water tank.
3. The strip steel pickling production line of claim 2, wherein a nozzle is arranged in the pressure-bearing water tank, and the water replenishing device is connected with the nozzle.
4. The strip steel pickling production line of claim 2, wherein the pressure-bearing water tank is connected with a pressure tank.
5. The strip steel pickling production line of claim 4, wherein a flow regulating valve and a flow meter are connected to a pipeline of the water replenishing device.
6. The strip steel pickling line of claim 1, comprising a dryer for drying the strip steel cleaned by the strip steel cleaning device.
7. The strip steel pickling production line of claim 1, wherein the boiler comprises a first stage heating device for heating by using high-temperature flue gas and a second stage heating device for heating by using natural gas.
8. The utility model provides a waste heat utilization system of belted steel pickling production line which characterized in that includes:
the recovery device comprises a pressure-bearing water tank, a boiler water supply pump set and a strip steel cleaning pump set, wherein the boiler water supply pump set and the strip steel cleaning pump set are connected with the pressure-bearing water tank; the strip steel cleaning pump set is used for supplying the hot water in the pressure-bearing water tank to a strip steel cleaning device in the strip steel pickling production line;
and the water replenishing device is connected with the pressure-bearing water tank and used for replenishing new water to the pressure-bearing water tank.
9. A hot water supply method for heat of a strip steel pickling production line is characterized by comprising the following steps:
step S10, providing steam by the boiler, and conveying the steam to the heat exchanger;
step S20, the heat exchanger sends the generated condensed water and secondary steam to a recovery device;
step S30, the water replenishing device replenishing the recovery device with fresh water; the fresh water supplemented by the water supplementing device, the condensed water and the secondary steam input by the heat exchanger are mixed into hot water in the recovery device; one part of the hot water in the recovery device is sent to a strip steel cleaning device, and the other part of the hot water is used for supplementing water for the boiler.
10. The method for supplying hot water according to claim 9, wherein the replenishment means replenishes fresh water in an amount equal to the amount of hot water supplied from the recovery means to the strip cleaning means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911322265.2A CN110976532A (en) | 2019-12-20 | 2019-12-20 | Strip steel acid pickling production line, waste heat utilization system thereof and heat hot water supply method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911322265.2A CN110976532A (en) | 2019-12-20 | 2019-12-20 | Strip steel acid pickling production line, waste heat utilization system thereof and heat hot water supply method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112708899A (en) * | 2020-12-09 | 2021-04-27 | 广东前力环保科技有限公司 | Stainless steel strip steel pickling production line |
| CN115307172A (en) * | 2022-08-17 | 2022-11-08 | 饶阳县胜岳锅炉制造有限公司 | Environment-friendly boiler flue gas waste heat recovery device |
-
2019
- 2019-12-20 CN CN201911322265.2A patent/CN110976532A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112708899A (en) * | 2020-12-09 | 2021-04-27 | 广东前力环保科技有限公司 | Stainless steel strip steel pickling production line |
| CN112708899B (en) * | 2020-12-09 | 2023-05-02 | 唐山市晟鑫冷轧薄板有限公司 | Stainless steel strip acid cleaning production line |
| CN115307172A (en) * | 2022-08-17 | 2022-11-08 | 饶阳县胜岳锅炉制造有限公司 | Environment-friendly boiler flue gas waste heat recovery device |
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