CN110355219B - Spray water supply system and control system of degreasing production line - Google Patents
Spray water supply system and control system of degreasing production line Download PDFInfo
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- CN110355219B CN110355219B CN201910489194.9A CN201910489194A CN110355219B CN 110355219 B CN110355219 B CN 110355219B CN 201910489194 A CN201910489194 A CN 201910489194A CN 110355219 B CN110355219 B CN 110355219B
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- 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
- B21B45/004—Heating the product
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- 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
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
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- 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
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
- C23G3/023—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously by spraying
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
- C23G3/027—Associated apparatus, e.g. for pretreating or after-treating
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- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a spray water supply system and a control system for a degreasing production line, wherein the spray water supply system comprises a hot water circulation mechanism, a hot water circulation tank, a boiler water outlet header pipe and a boiler water inlet header pipe; the air compressor cooling water circulation mechanism comprises a cooling circulation water tank, an air compressor cooling water circulation pipeline and a first water supplementing pipe. The control system comprises an air compressor cooling water temperature control module and is used for detecting the water temperature in the cooling circulating water tank and starting a first water supplementing circulating pump when the water temperature in the cooling circulating water tank reaches a first preset temperature. According to the invention, cooling water is transmitted to the multiple screw rod type water-cooling air compressors through the cooling circulating water tank and the air compressor cooling water circulating pipeline, and finally the cooling water flows back to the cooling circulating water tank, so that the cyclic utilization of the cooling water is realized; when the water temperature in the cooling circulation water tank rises to a certain temperature, the heated cooling water is output to the spraying equipment of the degreasing line, and the energy consumed by heating the degreasing line is reduced.
Description
Technical Field
The invention relates to a spray water supply system and a control system for a degreasing production line.
Background
The production of the steel strip comprises the procedures of pickling, rolling, degreasing, annealing, flattening, shearing and the like. The degreasing process is used for washing away grease remained on the surface of the rolled steel strip, and black spots which are difficult to clean are prevented from being formed on the surface of the steel strip by the grease in the subsequent annealing process. The degreasing line usually comprises an alkaline washing section and a water washing section, wherein the alkaline washing section and the water washing section are respectively provided with a separate hot water spraying device, each hot water spraying device is usually provided with a hot water boiler for supplying hot water, and the hot water boiler needs to use a large amount of heat energy in the working process, so that higher energy cost is caused. In addition, a large amount of heat energy is generated by a plurality of production devices on the steel strip production line in the working process and needs to be cooled by cooling water, and the heat energy is usually taken away by the cooling water and then directly dissipated to the surrounding environment, so that the heat energy is not effectively recycled, and the waste of the heat energy is caused.
Disclosure of Invention
The invention aims to solve at least one of the technical problems in the prior art, and provides a spray water supply system and a control system for a degreasing production line, which can reduce the energy cost of the degreasing production line.
According to a first aspect of the present invention, there is provided a degreasing production line spray water supply system, comprising:
the hot water circulating mechanism comprises a hot water boiler, a hot water circulating water tank, a boiler water outlet main pipe and a boiler water inlet main pipe, wherein a water outlet of the hot water boiler is communicated with the hot water circulating water tank through the boiler water outlet main pipe; the water inlet of the hot water boiler is communicated with a hot water circulating water tank through a boiler water inlet main pipe, and a hot water circulating pump is arranged on the boiler water inlet main pipe;
the cooling water circulation mechanism of the air compressor comprises a cooling circulation water tank, an air compressor cooling water circulation pipeline and a first water supplementing pipe, wherein the initial end and the terminal end of the air compressor cooling water circulation pipeline are connected with the air compressor cooling circulation water tank, and a plurality of screw type water-cooled air compressors are communicated between the initial end and the terminal end of the air compressor cooling water circulation pipeline; the cooling circulating water tank is communicated with the hot water circulating water tank through a first water supplementing pipe, and a first water supplementing circulating pump is arranged on the first water supplementing pipe;
and the tap water main pipe is communicated with the air compressor cooling circulating water tank through a tap water replenishing valve. The spray water supply system for the degreasing production line in the first aspect of the invention further comprises a tail gas heating and circulating mechanism, wherein the tail gas heating and circulating mechanism comprises a boiler tail gas heater, a tail gas heating and circulating water tank and a tail gas heating and circulating pipeline, the initial end and the terminal end of the tail gas heating and circulating pipeline are both communicated with the tail gas heating and circulating water tank, the boiler tail gas heater is arranged between the initial end and the terminal end of the tail gas heating and circulating pipeline, and the boiler tail gas heater takes tail gas of a hot water boiler as a heat source and is used for heating water in the tail gas heating and circulating pipeline; and the tail gas heating circulating water tank is communicated with the hot water circulating water tank through a second water supplementing pipe, and a second water supplementing circulating pump is arranged on the second water supplementing pipe.
The spray water supply system of the degreasing production line in the first aspect of the invention further comprises an annealing furnace cooling water circulation mechanism, wherein the annealing furnace cooling water circulation mechanism comprises a cooling circulation water pool, a heat exchanger and an annealing furnace cooling water circulation pipeline, and the heat exchanger is provided with a hot water flow channel and a cold water flow channel which are independent of each other; the starting end of the annealing furnace cooling water circulation pipeline is communicated with a water outlet of the cooling circulation water pool, the terminal end of the annealing furnace cooling water circulation pipeline is communicated with a water inlet of a hot water runner of the heat exchanger, a plurality of cover type bright annealing furnaces are communicated between the starting end and the terminal end of the annealing furnace cooling water circulation pipeline so as to take away heat in the furnace body, and the water outlet of the hot water runner is communicated with the cooling circulation water pool; and a water inlet of a cold water flow passage of the heat exchanger is communicated with a tap water main pipe, and a water outlet of the cold water flow passage is communicated with a tail gas heating circulating water tank.
The spray water supply system of the degreasing production line in the first aspect of the invention further comprises an annealing furnace cooling water circulation mechanism, wherein the annealing furnace cooling water circulation mechanism comprises a cooling circulation water pool, a heat exchanger and an annealing furnace cooling water circulation pipeline, and the heat exchanger is provided with a hot water flow channel and a cold water flow channel which are independent of each other; the starting end of the annealing furnace cooling water circulation pipeline is communicated with a water outlet of the cooling circulation water pool, the terminal end of the annealing furnace cooling water circulation pipeline is communicated with a water inlet of a hot water runner of the heat exchanger, a plurality of cover-type bright annealing furnaces are communicated between the starting end and the terminal end of the annealing furnace cooling water circulation pipeline, and the water outlet of the hot water runner is communicated with the cooling circulation water pool; and a water inlet of a cold water flow passage of the heat exchanger is communicated with a tap water main pipe, and a water outlet of the cold water flow passage is communicated with a hot water circulation water tank.
According to the spray water supply system of the degreasing production line in the first aspect of the invention, the hot water boiler comprises a first hot water boiler and a second hot water boiler, and water outlets of the first hot water boiler and the second hot water boiler are respectively connected with a boiler water outlet header pipe through a boiler water check valve; and the water inlets of the first hot water boiler and the second hot water boiler are respectively connected with a boiler water inlet main pipe through a boiler water inlet valve.
According to the spray water supply system for the degreasing production line in the first aspect of the invention, the inlet side and the outlet side of the hot water circulating pump are correspondingly provided with the hot circulating water stop valve and the hot circulating water check valve, and the hot circulating water stop valve, the hot water circulating pump and the hot circulating water check valve are provided with two sets which are mutually standby.
According to a second aspect of the present invention, there is provided a control system, wherein the control system includes:
the air compressor cooling water temperature control module is used for detecting the water temperature in the cooling circulating water tank and starting the first water replenishing circulating pump when the water temperature in the cooling circulating water tank reaches a first preset temperature.
The control system at least has the following beneficial effects: the air compressor machine cooling water temperature control module detects the temperature in the cooling circulation water tank, and when the temperature in the cooling circulation water tank rose to the uniform temperature, start first moisturizing circulating pump and export the cooling water after the intensification to the hot water circulation water tank to supply with the spraying equipment use of degrease line, be favorable to reducing the energy that the heating of degrease line will consume.
The control system according to the second aspect of the invention, further comprising:
and the tail gas heating circulating water tank temperature control module is used for detecting the water temperature in the tail gas heating circulating water tank and starting the second water replenishing circulating pump when the water temperature in the tail gas heating circulating water tank reaches a second preset temperature.
The control system according to the second aspect of the invention, further comprising:
and the water replenishing control module of the hot water circulating tank is used for replenishing tap water to the hot water circulating tank when the water level in the hot water circulating tank is reduced to a low water level.
The control system according to the second aspect of the invention, further comprising:
and the water replenishing control module of the tail gas heating circulating water tank is used for replenishing tap water heated by the heat exchanger to the tail gas heating circulating water tank when the water level in the tail gas heating circulating water tank is reduced to a low water level.
The invention has at least the following beneficial effects:
(1) hot water is supplied to the spraying section of the degreasing line through the hot water boiler, and the hot water is output to the hot water circulating water tank through the hot water boiler to be stored, so that the water temperature in the hot water circulating water tank is increased, and then the water with the increased water temperature is output to the hot water boiler through the hot water circulating water tank, so that the problem that the heating efficiency is reduced because water with large temperature difference is input into the hot water boiler is avoided, the circulating heating of boiler water is realized, and the use efficiency of the hot water boiler is improved;
(2) through cooling circulation water pitcher and air compressor machine cooling water circulating pipeline to many screw water-cooling air compressors transmission cooling water, the final backward flow of cooling water is to the cooling circulation water pitcher in, realize the cyclic utilization of cooling water, along with the cyclic utilization time growth of cooling water, the temperature in the cooling circulation water pitcher risees gradually, when the temperature in the cooling circulation water pitcher risees to the uniform temperature, can start the cooling water after first moisturizing circulating pump heaies up to hot water circulation water pitcher output, in order to supply with the spraying equipment use of degrease line, be favorable to reducing the energy that the heating of degrease line will consume.
Drawings
The invention is further described below with reference to the accompanying drawings and examples;
FIG. 1 is a block diagram of a degreasing line spray water supply system according to an embodiment of the present invention;
FIG. 2 is a block diagram of a degreasing line spray water supply system according to an embodiment of the present invention;
FIG. 3 is a block diagram of a degreasing line spray water supply system according to an embodiment of the invention;
FIG. 4 is a block diagram of a degreasing line spray water supply system according to an embodiment of the invention;
FIG. 5 is a schematic structural view of a hot water circulation mechanism in an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a cooling water circulation mechanism of an air compressor according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of an exhaust heating cycle mechanism according to an embodiment of the present invention;
FIG. 8 is a schematic structural view of a cooling water circulation mechanism of an annealing furnace in one embodiment of the present invention;
FIG. 9 is a schematic block diagram of a control system of one embodiment of the present invention.
Detailed Description
Referring to fig. 1, fig. 1 shows a spray water supply system of a degreasing production line according to an embodiment of the present invention, which includes a hot water circulation mechanism 10 and an air compressor cooling water circulation mechanism 20.
Referring now to fig. 5, fig. 5 illustrates a hot water circulation mechanism 10 according to an embodiment of the present invention. In fig. 5, the hot water circulation mechanism 10 includes a hot water boiler, a hot water circulation tank 11, a boiler water outlet header 13, and a boiler water inlet header 14, a water outlet of the hot water boiler is communicated with the hot water circulation tank 11 through the boiler water outlet header 13, the boiler water outlet header 13 is provided with two spray water branch pipes, the two spray water branch pipes correspondingly supply hot water to the first hot water spray section 151 and the second hot water spray section 152 of the degreasing line, and the two spray water branch pipes are correspondingly provided with stop valves YZ5 and YZ 6; the water inlet of boiler passes through boiler inlet manifold 14 and communicates hot-water circulation water tank 11, is equipped with the hot-water circulating pump on the boiler inlet manifold 14, takes out the water of hot-water circulation water tank 11 to the boiler through the hot-water circulating pump and heats. This embodiment, supply hot water to the shower section of degrease line through boiler, still export hot water through boiler and save to hot water circulating water tank 11, make the temperature in the hot water circulating water tank 11 like this promote, then through hot water circulating water tank 11 output water to boiler after the temperature promotes, can avoid from this to input the water input boiler with great difference in temperature and reduce heating efficiency, realized the circulation heating of boiler water, be favorable to improving boiler's availability factor.
With continued reference to fig. 5, the hot water boiler optionally includes a first hot water boiler 121 and a second hot water boiler 122, the water outlets of the first hot water boiler 121 and the second hot water boiler 122 are connected to the boiler water outlet manifold 13 through boiler water check valves YZ3, YZ4, respectively; the inlets of the first hot water boiler 121 and the second hot water boiler 122 are connected to the boiler water inlet manifold 14 through boiler water inlet valves YZ1 and YZ2, respectively. In an actual application example, the heat energy of first boiler 121, the output of second boiler 122 is 90W, 150W big calorie respectively, and first boiler 121 and second boiler 122 can simultaneous working, when one of them boiler breaks down and shuts down, can be by two spray sections output hot water of another boiler independent work for the degrease line to can avoid the unable normal production of whole production line, seriously influence production efficiency. Compare originally must two boiler simultaneous workings, just can guarantee to have two hot water spray sections of sufficient hot water supply degrease line to use, this system is because promoted boiler's heating efficiency for even if only a boiler work, also can guarantee to have two hot water spray sections of sufficient hot water supply for the degrease line.
With reference to fig. 5, optionally, the inlet side and the outlet side of the hot water circulating pump are correspondingly provided with a hot circulating water stop valve and a hot circulating water check valve, and the hot circulating water stop valve, the hot water circulating pump and the hot circulating water check valve are provided with two sets, which are mutually standby, so as to prevent the hot water circulating pump from being out of order and influencing the normal operation of the hot water boiler. As in fig. 5, the hot water circulation pump includes a pump M1 and a pump M2, the hot circulating water shut-off valve includes a valve YZ7 and a valve YZ8, and the hot circulating water check valve includes a valve YZ9 and a valve YZ 10.
Referring now to fig. 6, fig. 6 illustrates an air compressor cooling water circulation mechanism 20 according to an embodiment of the present invention. In fig. 6, the air compressor cooling water circulation mechanism 20 includes a cooling circulation water tank 21, an air compressor cooling water circulation pipeline 22, and a first water replenishing pipe 24, wherein the start end and the end of the air compressor cooling water circulation pipeline 22 are both connected to the cooling circulation water tank 21, and a plurality of screw type water-cooled air compressors 23 are communicated between the start end and the end of the air compressor cooling water circulation pipeline 22. And cooling water is transmitted to the plurality of screw type water-cooled air compressors 23 through the cooling circulating water tank 21 and the air compressor cooling water circulating pipeline 22, and finally flows back to the cooling circulating water tank 21, so that the cyclic utilization of the cooling water is realized.
The cooling circulation water tank 21 is communicated with the hot water circulation water tank 11 through a first water replenishing pipe 24, and a first water replenishing circulation pump is provided on the first water replenishing pipe 24. Along with the increase of the cyclic utilization time of the cooling water, the water temperature in the cooling circulation water tank 21 gradually rises, and when the water temperature in the cooling circulation water tank 21 rises to a certain temperature, the first water supplementing circulation pump can be started to output the cooling water after the temperature rise to the hot water circulation water tank 11 so as to supply the spraying equipment of the degreasing line for use, thereby being beneficial to reducing the energy to be consumed by heating the degreasing line.
As shown in fig. 6, the first water replenishing circulation pump includes a pump M5 and a pump M6, which are mutually standby to prevent one of the pumps from malfunctioning and affecting the normal operation of the system, and a check valve YZ13 and a check valve YZ14 are correspondingly installed on one side of the pump M5 and one side of the pump M6 to prevent the water in the first water replenishing pipe 24 from flowing back to the cooling circulation water tank 21.
The air compressor cooling water circulation mechanism 20 of the present embodiment includes a plurality of screw water-cooled air compressors 23, the air compressor cooling water circulation line 22 includes a plurality of branch pipes for correspondingly transmitting cooling water to the plurality of screw water-cooled air compressors 23, and each branch pipe is provided with an electromagnetic valve for controlling input of cooling water, such as the electromagnetic valves YV4, YV5, and YV6 in fig. 6. The compressor cooling water circulation line 22 of the present embodiment is provided at the start with a shutoff valve YZ18 and a circulation pump M4, and the water in the cooling water circulation tank 21 is pumped into each branch pipe by the circulation pump M4.
In this embodiment, the spray water supply system of the degreasing production line further includes a tap water main 60, the tap water main 60 is communicated with the air compressor cooling circulation water tank 21 through a tap water replenishing valve, when the cooling circulation water tank 21 outputs the heated cooling water to the hot water circulation water tank 11, the water level in the cooling circulation water tank 21 is lowered, and at this time, the tap water replenishing valve is opened to replenish tap water to the air compressor cooling circulation water tank 21. The tap water replenishing valve can be a ball float valve YZ17 and can automatically replenish tap water according to the water level in the air compressor cooling circulating water tank 21.
Referring to fig. 2, fig. 2 shows a spray water supply system of a degreasing production line according to an embodiment of the present invention, which includes a hot water circulation mechanism 10, an air compressor cooling water circulation mechanism 20, and a tail gas heating circulation mechanism 30.
In this embodiment, the hot water circulation mechanism 10 and the air compressor cooling water circulation mechanism 20 may adopt the structures provided above, and are not described herein again.
Referring now to fig. 7, fig. 7 illustrates an exhaust gas heating cycle mechanism 30 according to an embodiment of the present invention. In fig. 7, the tail gas heating and circulating mechanism 30 includes a boiler tail gas heater 32, a tail gas heating and circulating water tank 34, and a tail gas heating and circulating pipeline 31, where both the start end and the end of the tail gas heating and circulating pipeline 31 are communicated with the tail gas heating and circulating water tank 34, a boiler tail gas heater 32 is disposed between the start end and the end of the tail gas heating and circulating pipeline 31, the boiler tail gas heater 32 uses tail gas of a hot water boiler as a heat source, water in the tail gas heating and circulating water tank 34 enters the tail gas heating and circulating pipeline 31, is heated by the boiler tail gas heater 32, and then flows back to the tail; the tail gas heating circulation water tank 34 is communicated with the hot water circulation water tank 11 through a second water supplementing pipe 33, a second water supplementing circulating pump M3 is arranged on the second water supplementing pipe 33, water heated by tail gas is pumped into the hot water circulation water tank 11 through the second water supplementing circulating pump M3, and the hot water supply circulation mechanism 10 is used, so that heat energy generated by tail gas of the hot water boiler is effectively utilized. And a stop valve YZ12 is further arranged on one side of the second water replenishing circulating pump M3.
In practical application, the boiler tail gas heater 32 is installed on a tail gas chimney of the hot water boiler, tail gas generated in the heating process of the hot water boiler is discharged from the tail gas chimney, the circulating water pump M7 is started, water is pumped into the tail gas heating circulating pipeline 31 from the tail gas heating circulating water tank 34, and the water flows back to the heating circulating water tank after being heated by the boiler tail gas heater 32.
In the present embodiment, two sets of boiler off-gas heaters 32 are provided corresponding to the first hot water boiler 121 and the second hot water boiler 122 described above.
Referring to fig. 3, fig. 3 shows a spray water supply system of a degreasing production line, which includes a hot water circulation mechanism 10, an air compressor cooling water circulation mechanism 20, and an annealing furnace cooling water circulation mechanism 40 according to an embodiment of the present invention.
In this embodiment, the hot water circulation mechanism 10 and the air compressor cooling water circulation mechanism 20 may adopt the structures provided above, and are not described herein again.
Referring now to fig. 8, fig. 8 illustrates an annealing furnace cooling water circulation mechanism 40 provided in accordance with an embodiment of the present invention. In fig. 8, the annealing furnace cooling water circulation mechanism 40 includes a cooling circulation water tank 41, a heat exchanger 44, and an annealing furnace cooling water circulation line 42.
The annealing furnace cooling water circulation mechanism 40 of the present embodiment includes a plurality of hood type bright annealing furnaces 43, and the annealing furnace cooling water circulation line 42 includes a plurality of branch pipes for conveying cooling water to the plurality of hood type bright annealing furnaces 43. The annealing furnace cooling water circulation line 42 of the present embodiment is provided at the beginning with two sets of mutually-backup stop valves and circulation pumps, and the water in the cooling circulation water tank 21 is pumped into each branch pipe by the circulation pumps. As shown in fig. 8, the shutoff valve includes a valve YZ15 and a valve YZ16, and the circulation pump includes a pump M8 and a pump M9.
In this embodiment, the heat exchanger 44 is a plate heat exchanger, and is provided with a hot water flow passage and a cold water flow passage which are independent of each other and formed by corrugated sheets, the hot water flow passage of the heat exchanger 44 in this embodiment is used for introducing annealing furnace cooling water flowing out of the hood-type bright annealing furnace 43, the cold water flow passage is used for introducing normal-temperature tap water, and annealing furnace cooling water flowing out of the hood-type bright annealing furnace 43 and tap water exchange heat in respective flow passages, so that the annealing furnace cooling water flowing out of the hood-type bright annealing furnace 43 is cooled after exchanging heat, and then flows back to the cooling circulation water tank 41 for recycling, and the tap water is heated after exchanging heat, and is supplied to the.
It should be understood that a person skilled in the art may also use a heat exchanger with other structure, such as a shell-and-tube heat exchanger, as long as the heat exchange between two fluids with different temperatures can be realized, and the embodiment of the present invention is not limited in particular.
Specifically, the beginning end of the annealing furnace cooling water circulation pipeline 42 is communicated with the water outlet of the cooling circulation water pool 41, the terminal end of the annealing furnace cooling water circulation pipeline 42 is communicated with the water inlet 441 of the hot water flow passage of the heat exchanger 44, a plurality of cover-type bright annealing furnaces 43 are communicated between the beginning end and the terminal end of the annealing furnace cooling water circulation pipeline 42, and the water outlet 442 of the hot water flow passage is communicated with the cooling circulation water pool 41; the inlet 443 of the cold water flow passage of the heat exchanger 44 is communicated with the tap water main.
Alternatively, the cooling circulation water tank 41 is a sink-type water tank.
In general, when the hood-type bright annealing furnace 43 is used for treating a steel strip, a bottom fan thereof needs to be cooled by circulating cooling water 24 hours a day. In addition, the cooling stage of the annealing process also requires a large amount of cooling water to cool the inner mantle (from 95 degrees to 35 degrees), so that the hood-type bright annealing furnace 43 of the annealing line needs a large amount of cooling water every day, and a large amount of heat is dissipated in the process. In this embodiment, a plurality of hood-type bright annealing furnaces 43 are connected through an annealing furnace cooling water circulation pipeline 42, cooling water is supplied to the hood-type bright annealing furnaces 43 of the annealing line, and the cooling water flowing out of the hood-type bright annealing furnaces 43 takes away heat in the furnace body, so that the temperature is higher than the original temperature, and the cooling water flowing out of the hood-type bright annealing furnaces 43 flows into a hot water flow passage of a plate-type heat sink through the end of the annealing furnace cooling water circulation pipeline 42, fully exchanges heat with tap water in the cold water flow passage in the plate-type heat sink, and then flows back to a cooling circulation water tank 41, so that the purpose of recycling the annealing furnace. In this process, the tap water is preheated by the heat energy of the cooling water flowing out from the bell-type bright annealing furnace 43.
In this embodiment, the water outlet 444 of the cold water flow passage is communicated with the hot water circulation tank 11, and is used for inputting the tap water heated by heat exchange of the heat exchanger 44 to the hot water circulation tank 11.
Referring to fig. 4, fig. 4 shows a spray water supply system of a degreasing production line, which includes a hot water circulation mechanism 10, an air compressor cooling water circulation mechanism 20, an exhaust gas heating circulation mechanism 30, and an annealing furnace cooling water circulation mechanism 40 according to an embodiment of the present invention.
In this embodiment, the hot water circulating mechanism 10, the air compressor cooling water circulating mechanism 20, the tail gas heating circulating mechanism 30, and the annealing furnace cooling water circulating mechanism 40 may all adopt the structures provided above, and are not described herein again.
In this embodiment, a water outlet of a cold water flow passage of the annealing furnace cooling water circulation mechanism 40 is communicated with the tail gas heating circulation water tank 34, tap water heated by heat exchange of the heat exchanger 44 is input into the tail gas heating circulation water tank 34, and the tail gas heating circulation mechanism 30 is further heated.
In a practical example, cooling water is heated from 20 ℃ to 60 ℃ by a screw water-cooled air compressor 23 of England 160KW on a rolling line and then delivered to the hot water circulation water tank 11, and it is expected that the water can be raised to 40 ℃ per hour by 1T, which is equivalent to raising 1T of water to 40 ℃ per hour. According to the requirement that the heat value of 1T water is increased by 1 degree centigrade: q1 ═ 4.2 ^ 10^ 6J; the heat value of 1 degree electricity is: q2 ═ 3.6 ^ 10^ 6J; the electric quantity required by the water with 1T rising by 40 ℃ is calculated according to the following steps: S-Q1/Q2-1-40-46.8 KWH; according to the calculation of 20 hours of daily service time, the monthly electricity saving amount can be achieved by utilizing the air compressor cooling water circulation mechanism 20: 47 x 20 x 30 x 28080 degrees electrical.
In a practical application example, the temperature of the tap water at the normal temperature of 20 ℃ can reach about 35-38 ℃ after the tap water exchanges heat with the furnace body cooling water through the heat exchanger 44 of the annealing furnace cooling water circulation mechanism 40. Then enters the tail gas heating circulating water tank 34, is further heated to 45 ℃ by the tail gas heating circulating mechanism 30 and then is sent to the hot water circulating water tank 11, and can deliver about 1T water volume to the hot water circulating water tank 11 every hour on average. The calorific value required for 1 ℃ rise according to the water temperature of 1T water is as follows: q1 ═ CMT ═ 4.2 ^ 10^ 6J; the equivalent weight of heat value of 1 DEG electricity is Q2 ═ 3.6 ^ 10^ 6J; the electric quantity required for calculating the water quantity of 1T, when the water temperature rises to 25 ℃, is as follows: S-Q1/Q2-1-25-29.3 KWH; according to the usage time of 20 hours per day, the monthly electricity saving amount can be achieved by utilizing the annealing furnace cooling water circulation mechanism 40 and the tail gas heating circulation mechanism 30: 29.3 x 20 x 30 ═ 17550 degrees of electricity.
In conclusion, the system can save electricity of about 45630 ℃ for the steel strip production line by the hot water circulation structure 10, the air compressor cooling water circulation mechanism 20, the annealing furnace cooling water circulation mechanism 40 and the tail gas heating circulation mechanism 30 in each month, has considerable energy-saving effect, and can save a large amount of energy cost for enterprises.
According to an embodiment of the present invention, there is also provided a control system for controlling the spray water supply system of the degreasing production line, including: and the air compressor cooling water temperature control module is used for detecting the water temperature in the cooling circulating water tank 21 and starting the first water supplementing circulating pump M5/M6 when the water temperature in the cooling circulating water tank 21 reaches a first preset temperature.
Optionally, the control system further includes a temperature control module of the tail gas heating circulation water tank, which is used for detecting the water temperature in the tail gas heating circulation water tank 34, and starting the second water replenishing circulation pump M3 when the water temperature in the tail gas heating circulation water tank 34 reaches a second preset temperature.
Optionally, the control system further includes a water supply control module for supplying tap water to the hot water circulation tank 11 when the water level in the hot water circulation tank 11 drops to a low level.
Optionally, the control system further includes a water supplement control module of the tail gas heating circulation water tank, and the water supplement control module is configured to supplement tap water heated by the heat exchanger 44 to the tail gas heating circulation water tank 34 when the water level in the tail gas heating circulation water tank 34 drops to a low level.
Optionally, the control system further includes a cooling circulation water tank water replenishing control module, which is configured to replenish tap water to the cooling circulation water tank 41 when the water level in the cooling circulation water tank 41 drops to a low level.
It should be understood that each functional module in the embodiments of the present invention may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.
For example, in some embodiments, the control system is provided with P L C (programmable logic controller), please refer to fig. 9, this P L C is connected to the first make-up water circulation pumps M5, M6 in fig. 6, the P L C detects the temperature of the water in the cooling circulation water tank 21 through the first temperature sensor 25 in fig. 6 disposed in the cooling circulation water tank 21, and the P L C controls the start and stop of the first make-up water circulation pump M5 or M6 based on the temperature of the water in the cooling circulation water tank 21.
With continued reference to fig. 9, the P L C further detects the temperature of the water in the exhaust gas heating circulation water tank 34 through the second temperature sensor 36 disposed in the exhaust gas heating circulation water tank 34 in fig. 7, the P L C is connected to the second water replenishing circulation pump M3 in fig. 7, and the P L C controls the second water replenishing circulation pump M3 to start and stop based on the temperature of the water in the exhaust gas heating circulation water tank 34.
With continued reference to fig. 9, the P L C also detects the water level of the hot-water circulation tank 11 through the first level sensor 16 provided in the hot-water circulation tank 11 in fig. 5, and when the water level in the hot-water circulation tank 11 drops to a low level, the P L C controls the first solenoid valve YV1 to be activated to replenish the hot-water circulation tank 11 with tap water.
With continued reference to fig. 9, the P L C also detects the water level of the exhaust gas heating circulation water tank 34 through the second liquid level sensor 35 provided in the exhaust gas heating circulation water tank 34 in fig. 7, and when the water level in the exhaust gas heating circulation water tank 34 drops to a low level, the P L C controls the second solenoid valve YV2 to be activated to supplement the exhaust gas heating circulation water tank 34 with tap water heated by the heat exchanger 44.
With continued reference to fig. 9, the P L C also detects the water level of the cooling circulation water tank 41 through the third liquid level sensor 45 provided at the cooling circulation water tank 41 in fig. 8, and when the water level in the cooling circulation water tank 41 drops to a low level, the P L C controls the third solenoid valve YV3 to be activated to replenish tap water to the cooling circulation water tank 41.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. The utility model provides a degreasing production line shower water supply system which characterized in that includes:
the hot water circulating mechanism comprises a hot water boiler, a hot water circulating water tank, a boiler water outlet main pipe and a boiler water inlet main pipe, wherein a water outlet of the hot water boiler is communicated with the hot water circulating water tank through the boiler water outlet main pipe; the water inlet of the hot water boiler is communicated with a hot water circulating water tank through a boiler water inlet main pipe, and a hot water circulating pump is arranged on the boiler water inlet main pipe;
the cooling water circulation mechanism of the air compressor comprises a cooling circulation water tank, an air compressor cooling water circulation pipeline and a first water supplementing pipe, wherein the initial end and the terminal end of the air compressor cooling water circulation pipeline are connected with the cooling circulation water tank, and a plurality of screw type water-cooling air compressors are communicated between the initial end and the terminal end of the air compressor cooling water circulation pipeline; the cooling circulating water tank is communicated with the hot water circulating water tank through the first water replenishing pipe, and a first water replenishing circulating pump is arranged on the first water replenishing pipe;
and the tap water main pipe is communicated with the cooling circulating water tank through a tap water replenishing valve.
2. The spray water supply system of the degreasing production line according to claim 1, further comprising a tail gas heating circulation mechanism, wherein the tail gas heating circulation mechanism comprises a boiler tail gas heater, a tail gas heating circulation water tank and a tail gas heating circulation pipeline, a starting end and a terminal end of the tail gas heating circulation pipeline are both communicated with the tail gas heating circulation water tank, and the boiler tail gas heater is arranged between the starting end and the terminal end of the tail gas heating circulation pipeline; and the tail gas heating circulating water tank is communicated with the hot water circulating water tank through a second water supplementing pipe, and a second water supplementing circulating pump is arranged on the second water supplementing pipe.
3. The spray water supply system of the degreasing production line as recited in claim 2, further comprising an annealing furnace cooling water circulation mechanism, wherein the annealing furnace cooling water circulation mechanism comprises a cooling circulation water pool, a heat exchanger and an annealing furnace cooling water circulation pipeline, and the heat exchanger is provided with a hot water flow passage and a cold water flow passage; the starting end of the annealing furnace cooling water circulation pipeline is communicated with a water outlet of the cooling circulation water pool, the terminal end of the annealing furnace cooling water circulation pipeline is communicated with a water inlet of the hot water runner, a plurality of cover-type bright annealing furnaces are communicated between the starting end and the terminal end of the annealing furnace cooling water circulation pipeline, and the water outlet of the hot water runner is communicated with the cooling circulation water pool; and the water inlet of the cold water flow channel is communicated with the tap water main pipe, and the water outlet of the cold water flow channel is communicated with the tail gas heating circulating water tank.
4. The spray water supply system of the degreasing production line as recited in claim 1, further comprising an annealing furnace cooling water circulation mechanism, wherein the annealing furnace cooling water circulation mechanism comprises a cooling circulation water pool, a heat exchanger and an annealing furnace cooling water circulation pipeline, and the heat exchanger is provided with a hot water flow passage and a cold water flow passage; the starting end of the annealing furnace cooling water circulation pipeline is communicated with a water outlet of the cooling circulation water pool, the terminal end of the annealing furnace cooling water circulation pipeline is communicated with a water inlet of the hot water runner, a plurality of cover-type bright annealing furnaces are communicated between the starting end and the terminal end of the annealing furnace cooling water circulation pipeline, and the water outlet of the hot water runner is communicated with the cooling circulation water pool; and the water inlet of the cold water channel is communicated with the tap water main pipe, and the water outlet of the cold water channel is communicated with the hot water circulating water tank.
5. The spray water supply system of claim 1, wherein the hot water boiler comprises a first hot water boiler and a second hot water boiler, and water outlets of the first hot water boiler and the second hot water boiler are respectively connected with a boiler water outlet header through a boiler water check valve; and the water inlets of the first hot water boiler and the second hot water boiler are respectively connected with a boiler water inlet main pipe through a boiler water inlet valve.
6. The spray water supply system of claim 1, wherein a hot circulating water stop valve and a hot circulating water check valve are correspondingly arranged on an inlet side and an outlet side of the hot water circulating pump, and the hot circulating water stop valve, the hot water circulating pump and the hot circulating water check valve are provided with two sets and are mutually standby.
7. A control system for the spray water supply system of the degreasing line according to any one of claims 1 to 6, comprising:
the air compressor cooling water temperature control module is used for detecting the water temperature in the cooling circulating water tank and starting the first water replenishing circulating pump when the water temperature in the cooling circulating water tank reaches a first preset temperature.
8. The control system of claim 7, further comprising:
and the tail gas heating circulating water tank temperature control module is used for detecting the water temperature in the tail gas heating circulating water tank and starting the second water replenishing circulating pump when the water temperature in the tail gas heating circulating water tank reaches a second preset temperature.
9. The control system of claim 7, further comprising:
and the water replenishing control module of the hot water circulating tank is used for replenishing tap water to the hot water circulating tank when the water level in the hot water circulating tank is reduced to a low water level.
10. A control system according to claim 7, characterized in that the control system comprises:
and the water replenishing control module of the tail gas heating circulating water tank is used for replenishing tap water heated by the heat exchanger to the tail gas heating circulating water tank when the water level in the tail gas heating circulating water tank is reduced to a low water level.
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| CN110355219A (en) | 2019-10-22 |
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