CN105422457A - Heat recovery gradient utilization system for oil-free screw air compressor and control method - Google Patents
Heat recovery gradient utilization system for oil-free screw air compressor and control method Download PDFInfo
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- CN105422457A CN105422457A CN201510867706.2A CN201510867706A CN105422457A CN 105422457 A CN105422457 A CN 105422457A CN 201510867706 A CN201510867706 A CN 201510867706A CN 105422457 A CN105422457 A CN 105422457A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
Abstract
The invention discloses a heat recovery gradient utilization system for an oil-free screw air compressor. The heat recovery gradient utilization system is characterized by comprising an air compressor cooling device, a hot water gradient utilization device and a softened water device; the air compressor cooling device mainly comprises two compression main machines, two safety heat exchangers and a water pump. The hot water gradient utilization device is connected with the air compressor cooling device through a pipe network. The softened water device is connected with the hot water gradient utilization device and the air compressor cooling device through pipelines. By the adoption of the heat recovery gradient utilization system, waste heat of the oil-free screw air compressor can be recovered, required hot water is obtained, and the hot water is utilized in a gradient manner. The invention further discloses a control method for the heat recovery gradient utilization system. Systematic adjustment is carried out according to different water use conditions so as to fully and reasonably use recovered hot water, and recovered heat is efficiently utilized.
Description
Technical field
The invention belongs to air compressor heat recovery technology field, be specifically related to a kind of oil free screw air compressor heat recovery gradient utilization system.The invention still further relates to the controlling method of this oil free screw air compressor heat recovery gradient utilization system.
Background technique
Along with the growing tension of the energy, power saving has become the focus of current global concern.While active development new energy, also should more and more pay attention to reclaiming and utilizing residual heat resources.A statistics according to u.s. department of energy shows, in the electric energy consumed, only account for 15% of total power consumption really for increasing air potential energy, and the electric energy of all the other major parts (about 85%) is all converted into heat during compressor operating.These heats are generally be discharged in air by mode that is air-cooled or water-cooled to go, and cause the significant wastage of the energy.
The energy-conservation Main way of compressed air system is exactly the heat recovery of air compressor.Thus, the waste heat recovery utilizing some method and apparatus to be produced by air compressor utilizes, obtain the hot water of required different temperatures, Appropriate application is carried out to the hot water of different temperatures, both can recovered energy to greatest extent, reduce energy consumption, for enterprise saves most of cost, environment used heat can be reduced again and pollute.
At present residual heat of air compressor is reclaimed and there has also been some correlative studys, and relatively less for the research of oil free screw air compressor heat recovery, however very micro-especially for the Appropriate application research of reclaiming hot water in oil free screw heat recovery system for air compressor.
Summary of the invention
The object of this invention is to provide a kind of oil free screw air compressor heat recovery gradient utilization system, heat recovery can have been carried out to oil free screw air compressor, obtain the hot water needed, and cascade utilization has been carried out to hot water.
The technical solution adopted in the present invention is, a kind of oil free screw air compressor heat recovery gradient utilization system, is characterized in that, comprise cooling device of air compressor, hot water cascade utilization device and water softening device; Wherein, cooling device of air compressor mainly comprises two compression main frames and two guarantee heat exchangers and water pump, and manufacture hot water's cascade utilization device is connected by pipe network with between cooling device of air compressor; Water softening device is connected by pipeline with between hot water cascade utilization device and cooling device of air compressor.
Feature of the present invention is also,
The structure of cooling device of air compressor, comprise the first compression main frame and the second compression main frame, by the first breathing pipe and first, first compression main frame ensures that heat exchanger is connected, by the second breathing pipe and second, second compression main frame ensures that heat exchanger is connected, first compression main frame is respectively arranged with the first air compressor outlet pipe and the first air compressor intake pipe, second compression main frame is respectively arranged with the second air compressor outlet pipe and the second air compressor intake pipe, first ensures that heat exchanger is provided with the first guarantee heat exchanger outlet pipe and first ensures heat exchanger intake pipe, second ensures that heat exchanger is provided with the second guarantee heat exchanger outlet pipe and second ensures heat exchanger intake pipe, first ensures that heat exchanger outlet pipe and second ensures that heat exchanger outlet pipe is all connected with heat exchanger outlet pipe, and the first air compressor intake pipe, the second air compressor intake pipe, first ensure that heat exchanger intake pipe and second ensures that heat exchanger intake pipe is all connected with main water inlet tube, first air compressor outlet pipe is connected with the total outlet pipe of air compressor with the second air compressor outlet pipe, heat exchanger outlet pipe is connected with the total outlet pipe of air compressor, and joint is provided with valve D.
Hot water cascade utilization device comprises four plate type heat exchangers, plate type heat exchanger is connected with Low Temperature Thermal water end (W.E.) with cooling device of air compressor and high-temperature hot water end (W.E.) by pipe network.Four heat exchangers are the first plate type heat exchanger, the second plate type heat exchanger, three-plate type heat exchanger, the 4th plate type heat exchanger respectively, wherein, first plate type heat exchanger, the second plate type heat exchanger are connected with high-temperature-hot-water focus by pipeline, and three-plate type heat exchanger is connected with focus with low-temperature water heating by pipeline with the 4th plate type heat exchanger; First plate type heat exchanger is connected with the total outlet pipe of air compressor by the second temperature end heat exchanging water pipe, and the second plate type heat exchanger is connected with the total outlet pipe of air compressor by the 5th temperature end heat exchanging water pipe; Three-plate type heat exchanger is connected with the total outlet pipe of air compressor by the second low-temperature end heat exchanging water pipe, and the 4th plate type heat exchanger is connected with the total outlet pipe of air compressor by the 5th low-temperature end heat exchanging water pipe.
First plate type heat exchanger be provided with the first temperature end heat exchanging water pipe with hot junction; Second temperature end heat exchanging water pipe is communicated with the second plate type heat exchanger, and be communicated with the first temperature end heat exchanging water pipe, 4th temperature end heat exchanging water pipe is communicated with the second plate type heat exchanger, first plate type heat exchanger is also provided with the 6th temperature end heat exchanging water pipe, 4th temperature end heat exchanging water pipe is communicated with the 6th temperature end heat exchanging water pipe, the hot water sent in total outlet pipe with air compressor to plate type heat exchanger for the water passing into lower temperature carries out heat exchange, thus ensures the water temperature of this high temperature water end (W.E.).
5th temperature end heat exchanging water pipe is connected with the second temperature end heat exchanging water pipe; The total outlet pipe of air compressor is provided with valve A between the second temperature end heat exchanging water pipe and the 5th temperature end heat exchanging water pipe.
The total outlet pipe of air compressor is provided with the valve B being connected to heat exchanger outlet pipe and the total outlet pipe of air compressor between the 5th temperature end heat exchanging water pipe and the second low-temperature end heat exchanging water pipe, three-plate type heat exchanger is provided with the first low-temperature end heat exchanging water pipe, 4th plate type heat exchanger is provided with the 4th low-temperature end heat exchanging water pipe, first low-temperature end heat exchanging water pipe is communicated with the 3rd low-temperature end heat exchanging water pipe, as the EXIT POINT of low-temperature water heating using end, 6th low-temperature end heat exchanging water pipe is communicated with the 4th low-temperature end heat exchanging water pipe, as the feed-water end of low-temperature water heating using end, the cold water of low temperature water end (W.E.) is delivered to three-plate type heat exchanger and the 4th plate type heat exchanger, become operable low-temperature water heating after completing exchange heat wherein to flow out from the first low-temperature end heat exchanging water pipe and the 3rd low-temperature end heat exchanging water pipe, for user.
Also be interconnected between second low-temperature end heat exchanging water pipe and the 5th low-temperature end heat exchanging water pipe, the position on the total outlet pipe of air compressor between the 5th low-temperature end heat exchanging water pipe and the second low-temperature end heat exchanging water pipe is provided with valve C.
The end access tube shell heat exchanger of the total outlet pipe of air compressor, at air compressor total outlet pipe, the position of shell-and-tube heat exchanger is provided with valve E, the total outlet pipe of air compressor is also provided with return pipe, one end of return pipe is connected with shell-and-tube heat exchanger, the position of the other end between the tie point and the tie point of heat exchanger outlet pipe and the total outlet pipe of air compressor of the 5th low-temperature end heat exchanging water pipe and the total outlet pipe of air compressor.
Return pipe is connected with water storage box by water storage box intake pipe, water storage box is also connected with main water inlet tube, water storage box is connected with water softening device by softened water intake pipe, shell-and-tube heat exchanger is connected with cooling tower by cooling tower outlet pipe, between cooling tower and shell-and-tube heat exchanger, be also provided with cooling tower intake pipe in addition, cooling tower intake pipe is provided with valve.
Another object of the present invention is to provide the controlling method of this oil free screw air compressor heat recovery cascade utilization system.
Another technological scheme of the present invention is, a kind of controlling method of oil free screw air compressor heat recovery gradient utilization system, based on above-mentioned air compressor heat recovery gradient utilization system, specifically carries out according to following steps:
Step 1, system initialization, start air compressor heat recovery gradient utilization system, open valve, valve A, valve C, valve D, valve E, by tap water by obtaining softened water after water softening device, pass in water storage box by softened water intake pipe again, softened water from water storage box by passing into cooling device of air compressor after main water inlet tube;
Specifically, softened water enters the second air compressor and the first air compressor respectively by pipeline, entering the second guarantee heat exchanger and first respectively by pipeline ensures in heat exchanger, the valve being now in full-gear has: valve, valve A, valve C, valve D, valve E, now hot water cascade utilization device not enabled, after softened water for cooling absorbs heat, the total outlet pipe of air compressor is collected to after being discharged from the first air compressor second air compressor by outlet conduit, then got back in shell-and-tube heat exchanger by pipeline and then enter in cooling tower,
Ensureing from first, the softened water of heat exchanger ensures that heat exchanger and second ensures heat exchanger and is collected in heat exchanger outlet pipe after discharge for cooling, entering in cooling tower after then getting back in shell-and-tube heat exchanger; Water after cooled is got back in water storage box being entered row in shell-and-tube heat exchanger by pipeline, thus enters and circulate next time;
Step 2, open hot water cascade utilization device, valve A and valve C is closed, hot water in the total outlet pipe of air compressor through the second temperature end heat exchanging water pipe enter the first plate type heat exchanger and the second plate type heat exchanger with in the water that passes into carry out heat exchange, the hot water having changed heat enters the total outlet pipe of air compressor through the 5th temperature end heat exchanging water pipe, again through the second low-temperature end heat exchanging water pipe enter in three-plate type heat exchanger and the 4th plate type heat exchanger with in the water that passes into carry out heat exchange, the hot water having changed heat enters the total outlet pipe of air compressor through the 5th low-temperature end heat exchanging water pipe;
Step 3, carry out the adjustment of valve according to different operating mode thus more realize the control of recycling system:
When the low-temperature water heating temperature in heat exchanger outlet pipe is when meeting the requiring with coolant-temperature gage of three-plate type heat exchanger and the 4th plate type heat exchanger, throttle down D, Open valve B, enters three-plate type heat exchanger and the 4th plate type heat exchanger carries out heat exchange through the second low-temperature end heat exchanging water pipe after the high-temperature-hot-water in the total outlet pipe of the low-temperature water heating in heat exchanger outlet pipe and air compressor is mixed;
When the low-temperature water heating temperature in heat exchanger outlet pipe can not meet requiring with coolant-temperature gage of three-plate type heat exchanger and the 4th plate type heat exchanger, throttle down B, Open valve D, the low-temperature water heating in heat exchanger outlet pipe enters the total outlet pipe of air compressor.
When water temperature in the total outlet pipe of air compressor less than or equal to water storage box entering water temp require time, throttle down E, Open valve F, make the hot water in the total outlet pipe of air compressor directly enter water storage box by return pipe and water storage box intake pipe;
When water temperature in the total outlet pipe of air compressor higher than water storage box entering water temp require time, Open valve E, throttle down F, the water in the total outlet pipe of air compressor enters after shell-and-tube heat exchanger cools and enters water storage box through water storage box intake pipe.
As Open valve E, according to the size opened of the lower water temperature valve in water storage box intake pipe, make the water temperature in water storage box intake pipe a little less than the entering water temp of water storage box;
When the softened water in water storage box is lower than setting value, the softened water that water softening device obtains enters water storage box through softened water intake pipe, reaches moisturizing setting value.
The invention has the beneficial effects as follows, first the present invention has carried out heat recovery transformation to oil free screw air compressor, in oil free screw air compressor inner cooling system, interstage cooler and aftercooler adopt in parallel, make cooling water water-exit temperature higher, are more easily recovered utilization, not only save the energy, avoid the waste of resource, again high efficiency utilization is realized to the heat reclaimed, improve the economic benefit of enterprise.
Accompanying drawing explanation
Fig. 1 is the structural representation of oil free screw air compressor heat recovery gradient utilization system of the present invention.
In figure, 1. the first compression main frame, 2. the second compression main frame, 3. first ensure heat exchanger, 4. second ensure heat exchanger, 5. the first plate type heat exchanger, 6. the second plate type heat exchanger, 7. three-plate type heat exchanger, 8. the 4th plate type heat exchanger, 9. shell-and-tube heat exchanger, 10. valve, 11. cooling towers, 12. water softening devices, 13. water storage boxes, 14. water pumps, 15. valve A, 16. valve B, 17. valve C, 18. valve D, 19. valve E, 20. valve F, 1-1. first air compressor outlet pipe, 1-2. first air compressor intake pipe, 1-3. first breathing pipe, 2-1. second air compressor outlet pipe, 2-2. second air compressor intake pipe, 2-3. second breathing pipe, 3-1. first ensures heat exchanger outlet pipe, 3-2. first ensures heat exchanger intake pipe, 4-1. second ensures heat exchanger outlet pipe, 4-2. second ensures heat exchanger intake pipe, 21. main water inlet tubes, the total outlet pipe of 22. air compressor, 23. heat exchanger outlet pipes, 5-1. first temperature end heat exchanging water pipe, 5-2 second temperature end heat exchanging water pipe, 5-3. third high temperature end heat exchanging water pipe, 6-1. the 4th temperature end heat exchanging water pipe, 6-2. the 5th temperature end heat exchanging water pipe, 6-3. the 6th temperature end heat exchanging water pipe, 7-1. first low-temperature end heat exchanging water pipe, 7-2. second low-temperature end heat exchanging water pipe, 7-3. the 3rd low-temperature end heat exchanging water pipe, 8-1. the 4th low-temperature end heat exchanging water pipe, 8-2. the 5th low-temperature end heat exchanging water pipe, 8-3. the 6th low-temperature end heat exchanging water pipe, 9-1. return pipe, 9-2. cooling tower intake pipe, 9-3. cooling tower outlet pipe, 13-1. water storage box intake pipe, 13-2. softened water intake pipe.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
A kind of oil free screw air compressor heat recovery gradient utilization system, comprises cooling device of air compressor, hot water cascade utilization device, water softening device.
Wherein, cooling device of air compressor mainly comprises two compression main frames and two guarantee heat exchangers and water pump, plays cooling action to air-compressor set, under the effect of water circulation system, and transferring energy.Manufacture hot water's cascade utilization device is connected by pipe network with between cooling device of air compressor.Under the effect of water pump, cooling water cools, by cooling water transferring energy two compression main frames and two guarantee heat exchangers.
Water softening device is connected by pipeline with between hot water cascade utilization device and cooling device of air compressor.
Meanwhile, after in cooling device of air compressor, cooling water cools air-compressor set, the hot water obtained also is the hot water source of hot water cascade utilization device, and hot water enters hot water cascade utilization device, and heat is passed to the water system with hot junction.In hot water cascade utilization device, hot water enters different heat exchangers according to the demand of different heat supply point temperature and carries out heat exchange, realizes the conversion of energy.
Wherein, the structure of cooling device of air compressor, as shown in Figure 1, comprise the first compression main frame 1 and the second compression main frame 2, by the first breathing pipe 1-3 and first, first compression main frame 1 ensures that heat exchanger 3 is connected, by the second breathing pipe 2-3 and second, the second compression main frame 2 ensures that heat exchanger 4 is connected
First compression main frame 1 is respectively arranged with the first air compressor outlet pipe 1-1 and the first air compressor intake pipe 1-2, the second compression main frame 2 is respectively arranged with the second air compressor outlet pipe 2-1 and the second air compressor intake pipe 2-2,
First ensures that heat exchanger 3 is provided with the first guarantee heat exchanger outlet pipe 3-1 and first ensures heat exchanger intake pipe 3-2,
Second ensures that heat exchanger 4 is provided with the second guarantee heat exchanger outlet pipe 4-1 and second ensures heat exchanger intake pipe 4-2;
First air compressor intake pipe 1-2, the second air compressor intake pipe 2-2, first ensure that heat exchanger intake pipe 3-2 and second ensures that heat exchanger intake pipe 4-2 is all connected with main water inlet tube 21;
First air compressor outlet pipe 1-1 is connected with the total outlet pipe 22 of air compressor with the second air compressor outlet pipe 2-1;
First ensures that heat exchanger outlet pipe 3-1 and second ensures that heat exchanger outlet pipe 4-1 is all connected with heat exchanger outlet pipe 23,
Heat exchanger outlet pipe 23 is connected with the total outlet pipe 22 of air compressor, and joint is provided with valve D18,
Hot water cascade utilization device comprises four plate type heat exchangers, plate type heat exchanger is connected with Low Temperature Thermal water end (W.E.) with cooling device of air compressor and high-temperature hot water end (W.E.) by pipe network.Four heat exchangers are the first plate type heat exchanger 5, second plate type heat exchanger 6, three-plate type heat exchanger 7, the 4th plate type heat exchanger 8 respectively, wherein, first plate type heat exchanger 5, second plate type heat exchanger 6 is connected with high-temperature-hot-water focus by pipeline, and three-plate type heat exchanger 7 is connected with focus with low-temperature water heating by pipeline with the 4th plate type heat exchanger 8;
First plate type heat exchanger 5 is connected with the total outlet pipe 22 of air compressor by the second temperature end heat exchanging water pipe 5-2, and the second plate type heat exchanger 6 is connected with the total outlet pipe 22 of air compressor by the 5th temperature end heat exchanging water pipe 6-2,
5th temperature end heat exchanging water pipe 6-2 is connected with the second temperature end heat exchanging water pipe 5-2, is heat supply end;
The total outlet pipe 22 of air compressor is provided with valve A15 between the second temperature end heat exchanging water pipe 5-2 and the 5th temperature end heat exchanging water pipe 6-2;
The total outlet pipe of air compressor 22 is provided with the valve B16 being connected to heat exchanger outlet pipe 23 and the total outlet pipe 22 of air compressor between the 5th temperature end heat exchanging water pipe 6-2 and the second low-temperature end heat-exchanging water 7-2;
First plate type heat exchanger 5 be provided with the first temperature end heat exchanging water pipe 5-1 with hot junction; Second temperature end heat exchanging water pipe 5-3 is communicated with the second plate type heat exchanger 6, and be communicated with the first temperature end heat exchanging water pipe 5-1,4th temperature end heat exchanging water pipe 6-1 is communicated with the second plate type heat exchanger 6, first plate type heat exchanger 5 is also provided with the 6th temperature end heat exchanging water pipe 6-3,4th temperature end heat exchanging water pipe 6-1 is communicated with the 6th temperature end heat exchanging water pipe 6-3, the hot water sent in total outlet pipe with air compressor to plate type heat exchanger for the water passing into lower temperature carries out heat exchange, thus ensures the water temperature of this high temperature water end (W.E.).
Three-plate type heat exchanger 7, 4th plate type heat exchanger 8 jointly forms low-temperature water heating with the pipe network being connected them and utilizes part, three-plate type heat exchanger 7 is connected with the total outlet pipe 22 of air compressor by the second low-temperature end heat exchanging water pipe 7-2, 4th plate type heat exchanger 8 is connected with the total outlet pipe 22 of air compressor by the 5th low-temperature end heat exchanging water pipe 8-2, also be interconnected between second low-temperature end heat exchanging water pipe 7-2 and the 5th low-temperature end heat exchanging water pipe 8-2, position on the total outlet pipe 22 of air compressor between the 5th low-temperature end heat exchanging water pipe 8-2 and the second low-temperature end heat exchanging water pipe 7-2 is provided with valve C17,
Three-plate type heat exchanger 7 is provided with the first low-temperature end heat exchanging water pipe 7-1, 4th plate type heat exchanger 8 is provided with the 4th low-temperature end heat exchanging water pipe 8-1, first low-temperature end heat exchanging water pipe 7-1 is communicated with the 3rd low-temperature end heat exchanging water pipe 7-3, as the EXIT POINT of low-temperature water heating using end, 6th low-temperature end heat exchanging water pipe 8-3 is communicated with the 4th low-temperature end heat exchanging water pipe 8-1, as the feed-water end of low-temperature water heating using end, the cold water of low temperature water end (W.E.) is delivered to three-plate type heat exchanger and the 4th plate type heat exchanger, become operable low-temperature water heating after completing exchange heat wherein to flow out from the first low-temperature end heat exchanging water pipe 7-1 and the 3rd low-temperature end heat exchanging water pipe 7-3, for user.
The end access tube shell heat exchanger 9 of the total outlet pipe 22 of air compressor, is provided with valve E19 at the total outlet pipe 22 of air compressor near the position of shell-and-tube heat exchanger 9,
In addition, the total outlet pipe 22 of air compressor is also provided with return pipe 9-1, one end of return pipe 9-1 is connected with shell-and-tube heat exchanger 9, the position of the other end between the tie point and the tie point of heat exchanger outlet pipe 23 and the total outlet pipe 22 of air compressor of the 5th low-temperature end heat exchanging water pipe 8-2 and the total outlet pipe of air compressor 22.
Return pipe 9-1 is connected with water storage box 13 by water storage box intake pipe 13-1, and water storage box 13 is also connected with main water inlet tube 21, and water storage box is connected with water softening device by softened water intake pipe 13-2,
Shell-and-tube heat exchanger 9 is connected with cooling tower 11 by cooling tower outlet pipe 9-3, is also provided with cooling tower intake pipe 9-2 in addition between cooling tower 11 and shell-and-tube heat exchanger 9, and cooling tower intake pipe 9-2 is provided with valve 10.
The controlling method of a kind of oil free screw air compressor of the present invention heat recovery gradient utilization system, is characterized in that, based on above-mentioned air compressor heat recovery gradient utilization system, specifically carries out according to following steps:
Step 1, system initialization, start air compressor heat recovery gradient utilization system, open valve 10, valve A15, valve C17, valve D18, valve E19, by tap water by obtaining softened water after water softening device 12, pass in water storage box 13 by softened water intake pipe again, softened water from water storage box 13 by passing into cooling device of air compressor after main water inlet tube 21;
Specifically, softened water enters the second air compressor 2 and the first air compressor 1 respectively by pipeline, entering the second guarantee heat exchanger 4 and first respectively by pipeline ensures in heat exchanger 3, the valve being now in full-gear has: valve 10, valve A15, valve C17, valve D18, valve E19, now hot water cascade utilization device not enabled, after softened water for cooling absorbs heat, the total outlet pipe 22 of air compressor is collected to after being discharged from the first air compressor 1 second air compressor 2 by outlet conduit, then then got back in shell-and-tube heat exchanger 9 by pipeline enters in cooling tower 11,
Ensureing that the softened water of heat exchanger is collected in heat exchanger outlet pipe 23 after discharging from the first guarantee heat exchanger 3 and the second guarantee heat exchanger 4 for cooling, entering in cooling tower 11 after then getting back in shell-and-tube heat exchanger 9.
Water after cooled is got back in water storage box 13 being entered row in shell-and-tube heat exchanger 9 by 9-2 pipeline, thus enters and circulate next time.
Step 2, open hot water cascade utilization device, valve A15 and valve C17 is closed, the water that hot water in the total outlet pipe 22 of air compressor passes in the second temperature end heat exchanging water pipe 5-2 enters the first plate type heat exchanger 5 and the second plate type heat exchanger 6 and 6-3 carries out heat exchange, the hot water having changed heat enters the total outlet pipe 22 of air compressor through the 5th temperature end heat exchanging water pipe 6-2, enter in three-plate type heat exchanger 7 and the 4th plate type heat exchanger 8 through the second low-temperature end heat exchanging water pipe 7-2 again and carry out heat exchange with the water that passes in 8-3, the hot water having changed heat enters the total outlet pipe 22 of air compressor through the 5th low-temperature end heat exchanging water pipe 8-2,
Step 3, carry out the adjustment of valve according to different operating mode thus more realize the control of recycling system:
When the low-temperature water heating temperature in heat exchanger outlet pipe 23 is when meeting the requiring with coolant-temperature gage of three-plate type heat exchanger 7 and the 4th plate type heat exchanger 8, throttle down D18, Open valve B16, enters three-plate type heat exchanger 7 and the 4th plate type heat exchanger 8 carries out heat exchange through the second low-temperature end heat exchanging water pipe 7-2 after the high-temperature-hot-water in the total outlet pipe 22 of the low-temperature water heating in heat exchanger outlet pipe 23 and air compressor is mixed;
When the low-temperature water heating temperature in heat exchanger outlet pipe 23 can not meet requiring with coolant-temperature gage of three-plate type heat exchanger 7 and the 4th plate type heat exchanger 8, throttle down B16, Open valve D18, the low-temperature water heating in heat exchanger outlet pipe 23 enters the total outlet pipe 22 of air compressor.
When water temperature in the total outlet pipe 22 of air compressor less than or equal to water storage box 13 entering water temp require time, throttle down E19, Open valve F20, make the hot water in the total outlet pipe 22 of air compressor directly enter water storage box 13 by return pipe 9-1 and water storage box intake pipe 13-1;
When water temperature in the total outlet pipe 22 of air compressor higher than water storage box 13 entering water temp require time, Open valve E19, throttle down F20, the water in the total outlet pipe 22 of air compressor enters after shell-and-tube heat exchanger 9 cools and enters water storage box 13 through water storage box intake pipe 13-1.
As Open valve E19, according to the size opened of the lower water temperature valve 10 in water storage box intake pipe 13-1, make the water temperature in water storage box intake pipe 13-1 a little less than the entering water temp of water storage box 13;
When the softened water in water storage box 13 is lower than setting value, the softened water that water softening device 12 obtains enters water storage box 13 through softened water intake pipe 13-2, reaches moisturizing setting value.
Softened water in water storage box 13 enters in main water inlet tube 21 for system under the effect of water pump 14.
Claims (10)
1. an oil free screw air compressor heat recovery gradient utilization system, is characterized in that, comprises cooling device of air compressor, hot water cascade utilization device and water softening device; Wherein, cooling device of air compressor mainly comprises two compression main frames and two guarantee heat exchangers and water pump, and described manufacture hot water's cascade utilization device is connected by pipe network with between cooling device of air compressor; Described water softening device is connected by pipeline with between hot water cascade utilization device and cooling device of air compressor.
2. oil free screw air compressor heat recovery gradient utilization system according to claim 1, it is characterized in that, the structure of described cooling device of air compressor, comprise the first compression main frame (1) and the second compression main frame (2), by the first breathing pipe (1-3) and first, the first described compression main frame (1) ensures that heat exchanger (3) is connected, by the second breathing pipe (2-3) and second, the second described compression main frame (2) ensures that heat exchanger (4) is connected
The first described compression main frame (1) is respectively arranged with the first air compressor outlet pipe (1-1) and the first air compressor intake pipe (1-2), the second described compression main frame (2) is respectively arranged with the second air compressor outlet pipe (2-1) and the second air compressor intake pipe (2-2)
Described first ensures that heat exchanger (3) is provided with the first guarantee heat exchanger outlet pipe (3-1) and first ensures heat exchanger intake pipe (3-2), and described second ensures that heat exchanger (4) is provided with the second guarantee heat exchanger outlet pipe (4-1) and second ensures heat exchanger intake pipe (4-2); Described first ensures that heat exchanger outlet pipe (3-1) and second ensures that heat exchanger outlet pipe (4-1) is all connected with heat exchanger outlet pipe (23),
The first described air compressor intake pipe (1-2), the second air compressor intake pipe (2-2), first ensure that heat exchanger intake pipe (3-2) and second ensures that heat exchanger intake pipe (4-2) is all connected with main water inlet tube (21); The first described air compressor outlet pipe (1-1) is connected with the total outlet pipe of air compressor (22) with the second air compressor outlet pipe (2-1);
Described heat exchanger outlet pipe (23) is connected with the total outlet pipe of air compressor (22), and is provided with valve D (18) in joint.
3. oil free screw air compressor heat recovery gradient utilization system according to claim 1, it is characterized in that, described hot water cascade utilization device comprises four plate type heat exchangers, described plate type heat exchanger is connected with Low Temperature Thermal water end (W.E.) with cooling device of air compressor and high-temperature hot water end (W.E.) by pipe network; Four described heat exchangers are the first plate type heat exchanger (5), the second plate type heat exchanger (6), three-plate type heat exchanger (7), the 4th plate type heat exchanger (8) respectively, wherein, first plate type heat exchanger (5), the second plate type heat exchanger (6) are connected with high-temperature-hot-water focus by pipeline, and described three-plate type heat exchanger (7) is connected with focus with low-temperature water heating by pipeline with the 4th plate type heat exchanger (8); Described the first plate type heat exchanger (5) is connected with the total outlet pipe of air compressor (22) by the second temperature end heat exchanging water pipe (5-2), and described the second plate type heat exchanger (6) is connected with the total outlet pipe of air compressor (22) by the 5th temperature end heat exchanging water pipe (6-2); Described three-plate type heat exchanger (7) is connected with the total outlet pipe of air compressor (22) by the second low-temperature end heat exchanging water pipe (7-2), and the 4th described plate type heat exchanger (8) is connected with the total outlet pipe of air compressor (22) by the 5th low-temperature end heat exchanging water pipe (8-2).
4. oil free screw air compressor heat recovery gradient utilization system according to claim 3, is characterized in that, described the first plate type heat exchanger (5) be provided with the first temperature end heat exchanging water pipe (5-1) with hot junction, the second described temperature end heat exchanging water pipe (5-3) is communicated with the second plate type heat exchanger (6), and be communicated with the first temperature end heat exchanging water pipe (5-1), the 4th described temperature end heat exchanging water pipe (6-1) is communicated with the second plate type heat exchanger (6), first plate type heat exchanger (5) is also provided with the 6th temperature end heat exchanging water pipe (6-3), the 4th described temperature end heat exchanging water pipe (6-1) is communicated with the 6th temperature end heat exchanging water pipe (6-3), the hot water sent in total outlet pipe with air compressor to plate type heat exchanger for the water passing into lower temperature carries out heat exchange, thus ensure the water temperature of this high temperature water end (W.E.).
5. oil free screw air compressor heat recovery gradient utilization system according to claim 4, is characterized in that, both the 5th described temperature end heat exchanging water pipe (6-2) and the second temperature end heat exchanging water pipe (5-2) are connected; The total outlet pipe of described air compressor (22) is positioned between the second temperature end heat exchanging water pipe (5-2) and the 5th temperature end heat exchanging water pipe (6-2) and is provided with valve A (15).
6. oil free screw air compressor heat recovery gradient utilization system according to claim 3, it is characterized in that, the total outlet pipe of described air compressor (22) is positioned at the valve B (16) being provided with between the 5th temperature end heat exchanging water pipe (6-2) and the second low-temperature end heat exchanging water pipe (7-2) and being connected to heat exchanger outlet pipe (23) and the total outlet pipe of air compressor (22), described three-plate type heat exchanger (7) is provided with the first low-temperature end heat exchanging water pipe (7-1), the 4th described plate type heat exchanger (8) is provided with the 4th low-temperature end heat exchanging water pipe (8-1), the first described low-temperature end heat exchanging water pipe (7-1) is communicated with the 3rd low-temperature end heat exchanging water pipe (7-3), as the EXIT POINT of low-temperature water heating using end, the 6th described low-temperature end heat exchanging water pipe (8-3) is communicated with the 4th low-temperature end heat exchanging water pipe (8-1), as the feed-water end of low-temperature water heating using end, the cold water of low temperature water end (W.E.) is delivered to three-plate type heat exchanger and the 4th plate type heat exchanger, become operable low-temperature water heating after completing exchange heat wherein to flow out from the first low-temperature end heat exchanging water pipe (7-1) and the 3rd low-temperature end heat exchanging water pipe (7-3), for user.
7. oil free screw air compressor heat recovery gradient utilization system according to claim 6, it is characterized in that, also be interconnected between the second described low-temperature end heat exchanging water pipe (7-2) and the 5th low-temperature end heat exchanging water pipe (8-2), the position total outlet pipe of air compressor (22) is positioned between the 5th low-temperature end heat exchanging water pipe (8-2) and the second low-temperature end heat exchanging water pipe (7-2) is provided with valve C (17).
8. oil free screw air compressor heat recovery gradient utilization system according to claims 2 to 7, it is characterized in that, the end access tube shell heat exchanger (9) of the total outlet pipe of described air compressor (22), at the total outlet pipe of described air compressor (22), the position of shell-and-tube heat exchanger (9) is provided with valve E (19), the total outlet pipe of air compressor (22) is also provided with return pipe (9-1), one end of described return pipe (9-1) is connected with shell-and-tube heat exchanger (9), the other end is positioned at the position between the tie point of the 5th low-temperature end heat exchanging water pipe (8-2) and the total outlet pipe of air compressor (22) and the tie point of heat exchanger outlet pipe (23) and the total outlet pipe of air compressor (22).
9. oil free screw air compressor heat recovery gradient utilization system according to claim 8, it is characterized in that, described return pipe (9-1) is connected with water storage box (13) by water storage box intake pipe (13-1), described water storage box (13) is also connected with main water inlet tube (21), described water storage box is connected with water softening device by softened water intake pipe (13-2), described shell-and-tube heat exchanger (9) is connected with cooling tower (11) by cooling tower outlet pipe (9-3), cooling tower intake pipe (9-2) is also provided with in addition between cooling tower (11) and shell-and-tube heat exchanger (9), cooling tower intake pipe (9-2) is provided with valve (10).
10. a controlling method for oil free screw air compressor heat recovery gradient utilization system, is characterized in that, based on above-mentioned air compressor heat recovery gradient utilization system, specifically carries out according to following steps:
Step 1, system initialization, start air compressor heat recovery gradient utilization system, open valve (10), valve A (15), valve C (17), valve D (18), valve E (19), tap water is obtained softened water by after water softening device (12), pass in water storage box (13) by softened water intake pipe again, softened water passes into cooling device of air compressor by after main water inlet tube (21) from water storage box (13);
Specifically, described softened water enters the second air compressor (2) and the first air compressor (1) respectively by pipeline, entering the second guarantee heat exchanger (4) and first respectively by pipeline ensures in heat exchanger (3), the valve being now in full-gear has: valve (10), valve A (15), valve C (17), valve D (18), valve E (19), now hot water cascade utilization device not enabled, after softened water for cooling absorbs heat, the total outlet pipe of air compressor (22) is collected to after being discharged from the first air compressor (1) second air compressor (2) by outlet conduit, then then got back in shell-and-tube heat exchanger (9) by pipeline enters in cooling tower (11),
Ensureing from first, the softened water of heat exchanger ensures that heat exchanger (3) and second ensures heat exchanger (4) and is collected in heat exchanger outlet pipe (23) after discharge for cooling, entering in cooling tower (11) after then getting back in shell-and-tube heat exchanger (9);
Water after cooled is entering capable in shell-and-tube heat exchanger (9) getting back in water storage box (13) by (9-2) pipeline, thus enters and circulate next time;
Step 2, open hot water cascade utilization device, valve A (15) and valve C (17) is closed, the water that hot water in the total outlet pipe of air compressor (22) passes in the second temperature end heat exchanging water pipe (5-2) enters the first plate type heat exchanger (5) and the second plate type heat exchanger (6) and (6-3) carries out heat exchange, the hot water having changed heat enters the total outlet pipe of air compressor (22) through the 5th temperature end heat exchanging water pipe (6-2), enter in three-plate type heat exchanger (7) and the 4th plate type heat exchanger (8) through the second low-temperature end heat exchanging water pipe (7-2) again and carry out heat exchange with the water that passes in (8-3), the hot water having changed heat enters the total outlet pipe of air compressor (22) through the 5th low-temperature end heat exchanging water pipe (8-2),
Step 3, carry out the adjustment of valve according to different operating mode thus more realize the control of recycling system:
When the low-temperature water heating temperature in heat exchanger outlet pipe (23) is when meeting the requiring with coolant-temperature gage of three-plate type heat exchanger (7) and the 4th plate type heat exchanger (8), throttle down D (18), Open valve B (16), enters three-plate type heat exchanger (7) and the 4th plate type heat exchanger (8) carries out heat exchange through the second low-temperature end heat exchanging water pipe (7-2) after the low-temperature water heating in heat exchanger outlet pipe (23) is mixed with the high-temperature-hot-water in the total outlet pipe of air compressor (22);
When the low-temperature water heating temperature in heat exchanger outlet pipe (23) can not meet requiring with coolant-temperature gage of three-plate type heat exchanger (7) and the 4th plate type heat exchanger (8), throttle down B (16), Open valve D (18), the low-temperature water heating in heat exchanger outlet pipe (23) enters the total outlet pipe of air compressor (22);
When water temperature requires less than or equal to the entering water temp of water storage box (13) in the total outlet pipe of air compressor (22), throttle down E (19), Open valve F (20), makes the hot water in the total outlet pipe of air compressor (22) directly enter water storage box (13) by return pipe (9-1) and water storage box intake pipe 1 (3-1);
When water temperature requires higher than the entering water temp of water storage box (13) in the total outlet pipe of air compressor (22), Open valve E (19), throttle down F (20), the water in the total outlet pipe of air compressor (22) enters after shell-and-tube heat exchanger (9) cools and enters water storage box (13) through water storage box intake pipe (13-1);
When Open valve E (19), according to the size opened of the lower water temperature valve (10) in water storage box intake pipe (13-1), make the water temperature in water storage box intake pipe (13-1) a little less than the entering water temp of water storage box (13);
When the softened water in water storage box (13) is lower than setting value, the softened water that water softening device (12) obtains enters water storage box (13) through softened water intake pipe (13-2), reaches moisturizing setting value.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108716765A (en) * | 2018-06-27 | 2018-10-30 | 阿特拉斯·科普柯(无锡)压缩机有限公司 | A kind of energy recycle device |
| CN109611383A (en) * | 2019-01-02 | 2019-04-12 | 嘉兴先博节能技术有限公司 | A kind of centrifugal air compressor step waste-heat recovery device |
| CN114777187A (en) * | 2020-05-26 | 2022-07-22 | 万众热工科技(广州)有限公司 | Heat energy recovery management system and recovery management method for centrifugal air compressor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120090340A1 (en) * | 2010-10-19 | 2012-04-19 | Miura Co., Ltd. | Heat recovery system |
| CN102797661A (en) * | 2012-08-03 | 2012-11-28 | 齐齐哈尔轨道交通装备有限责任公司 | Air compressor residual-heat utilization system and method |
| CN202718837U (en) * | 2012-07-25 | 2013-02-06 | 上海安悦节能技术有限公司 | Waste heat recovery and gradient utilization device of air compressor |
| CN203051144U (en) * | 2012-12-21 | 2013-07-10 | 洛阳蓝海实业有限公司 | Energy-saving device for recycling waste heat of air compressor |
| CN203685588U (en) * | 2014-01-27 | 2014-07-02 | 上海瑞晨环保科技有限公司 | Waste heat recovery device of oil-free screw air compressor |
| CN205423171U (en) * | 2015-11-30 | 2016-08-03 | 西安工程大学 | There is not oily screw compressor heat recovery cascade utilization system |
-
2015
- 2015-11-30 CN CN201510867706.2A patent/CN105422457B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120090340A1 (en) * | 2010-10-19 | 2012-04-19 | Miura Co., Ltd. | Heat recovery system |
| CN202718837U (en) * | 2012-07-25 | 2013-02-06 | 上海安悦节能技术有限公司 | Waste heat recovery and gradient utilization device of air compressor |
| CN102797661A (en) * | 2012-08-03 | 2012-11-28 | 齐齐哈尔轨道交通装备有限责任公司 | Air compressor residual-heat utilization system and method |
| CN203051144U (en) * | 2012-12-21 | 2013-07-10 | 洛阳蓝海实业有限公司 | Energy-saving device for recycling waste heat of air compressor |
| CN203685588U (en) * | 2014-01-27 | 2014-07-02 | 上海瑞晨环保科技有限公司 | Waste heat recovery device of oil-free screw air compressor |
| CN205423171U (en) * | 2015-11-30 | 2016-08-03 | 西安工程大学 | There is not oily screw compressor heat recovery cascade utilization system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108716765A (en) * | 2018-06-27 | 2018-10-30 | 阿特拉斯·科普柯(无锡)压缩机有限公司 | A kind of energy recycle device |
| CN109611383A (en) * | 2019-01-02 | 2019-04-12 | 嘉兴先博节能技术有限公司 | A kind of centrifugal air compressor step waste-heat recovery device |
| CN109611383B (en) * | 2019-01-02 | 2020-12-15 | 浙江先博节能科技有限公司 | Centrifugal air compressor step waste heat recovery device |
| CN114777187A (en) * | 2020-05-26 | 2022-07-22 | 万众热工科技(广州)有限公司 | Heat energy recovery management system and recovery management method for centrifugal air compressor |
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