CN208952511U - A kind of constant pressure water supply type industry cooling water circulation system that band bypass is adjusted - Google Patents

Abstract

The utility model relates to a kind of industry cooling water circulation systems, more particularly to a kind of constant pressure water supply type industry cooling water circulation system that band bypass is adjusted, including cooling tower, cooling water pump, cooling water pipeline, water return pipeline, heat exchanger and controller, the water outlet of the cooling water pump is connected to by mixed water vacuum tank with cooling water pipeline, air valve is installed at the top of the mixed water vacuum tank, the cooling water pipeline and water return pipeline is connected with adjusting bypass, bypass motorized adjustment water valve and bypass check valve have been sequentially connected in the adjusting bypass, bypass motorized adjustment water valve is electrically connected with the controller, bypass check valve guarantees that the water (flow) direction in pipeline flows to water return pipeline from cooling water pipeline.The utility model increases mixed water vacuum tank, and bypass regulatory function is increased, not only ensure that the stabilization of ductwork pressure, also can be that cooling water pump operating condition is more stable, to guarantee that cooling water pump always works in high efficient district, and the antiscale component pipeline that prevents from leaking water is set and generates scale.

Description

A kind of constant pressure water supply type industry cooling water circulation system that band bypass is adjusted

Technical field

The utility model relates to the constant pressure water supplies that a kind of industry cooling water circulation system more particularly to a kind of bypass of band are adjusted Type industry cooling water circulation system.

Background technique

In industrial enterprise, cooling water recirculation system is a Xiang Changjian and critically important production corollary system, have be The features such as complexity, Yong Huduo, big water of uniting.

For example, chemical company is horizontal heat exchanger using the equipment 90% of cooling water, corresponding recirculating cooling water system Energy consumption is also very high, and water consumption accounts for about the 85%~92% of enterprise's total water consumption, and power load accounts for about enterprise's total electricity consumption 20%~30%.

In pharmacy corporation production, many techniques need to reduce temperature, to use the fluid that can remove material heat, Usual cooling water is cooled down, such as the production of bulk pharmaceutical chemicals, needs to carry out cold place using compressed air of the cooling water to fermentation Reason, while the heat that bulk pharmaceutical chemicals fermentation generates is taken away using cooling water.

In metallurgy industry, technique cold water designs sintering, coking, ironmaking, steel-making, Rolling production whole process, and energy consumption is huge, with For mini-medium mill, only cooling water pump year power consumption is just up to 300,000,000 kWh or more.

The Chinese utility model patent of Publication No. CN204006906U discloses a kind of enclosed cooling recirculation system, tool Body is related to a kind of energy saving scale protective type chemical process enclosed cooling recirculation system, can be according to unit load dynamic regulation to be cooled system The operating status of system reduces energy consumption, and the antiscale component pipeline that prevents from leaking water is arranged and generates scale.But the circulation there are still The space of energy saving optimizing is carried out, for example influences cooling water since the variation of thermic load causes ductwork pressure to change when more pump operations The working condition of pump, it is difficult to guarantee that cooling water pump always works in high efficient district.

Utility model content

Deficiency in solve above-mentioned technical problem, the purpose of this utility model is that: provide what a kind of bypass of band was adjusted Constant pressure water supply type industry cooling water circulation system increases mixed water vacuum tank, and increases bypass regulatory function, not only ensure that The stabilization of ductwork pressure also can be that cooling water pump operating condition is more stable, to guarantee that cooling water pump always works in high efficient district, reduce Energy consumption, and the antiscale component pipeline that prevents from leaking water is set and generates scale.

The technical scheme adopted by the utility model for solving the technical problem is:

A kind of constant pressure water supply type industry cooling water circulation system that band bypass is adjusted, including cooling tower, cooling water pump, cooling The water outlet of waterpipe, water return pipeline, heat exchanger and controller, the cooling water pump passes through mixed water vacuum tank and cooling water Pipeline is connected to, and is equipped with air valve at the top of the mixed water vacuum tank, the cooling water pipeline and water return pipeline are connected with Bypass is adjusted, bypass motorized adjustment water valve and bypass check valve has been sequentially connected in the adjusting bypass, has bypassed motorized adjustment Water valve is electrically connected with the controller, and bypass check valve guarantees that the water (flow) direction in pipeline flows to water return pipeline from cooling water pipeline.

Further, the cooling water pump is equipped with pump variable frequency device, and cooling tower is equipped with blower and heat exchange coil, corresponding wind Fan frequency converter is arranged in machine, is arranged electric-powered shutter above cooling tower tower body, and heat exchange coil inner wall uses helicitic texture, between screw thread Away from for 4~5.5mm, the depth of thread is 0.3~0.45mm, and heat exchange coil water outlet is communicated by water supply line I with cooling pond, Cooling pond is communicated by water supply line II with cooling water pump entrance, and cooling water pump water outlet, expansion valve, changes mixed water vacuum tank Hot device water inlet sequentially passes through cooling water pipeline and communicates, and heat exchanger water outlet passes through water return pipeline and heat exchange coil water inlet phase It is logical, cooling water filtering device is set on cooling water pipeline, and pump capacity meter, heat exchange coil, water supply is arranged in cooling water pump water outlet Pipeline I, water supply line II, cooling water pipeline and water return pipeline embed permanent magnetism piece respectively, and coolant water temperature is arranged on cooling water pipeline Sensor and cooling water pressure force snesor are spent, return water temperature sensor and pressure of return water sensor are set on water return pipeline, it is extraneous Air temperature sensor is fixed in the air outside cooling tower, pump capacity meter, cooling-water temperature sensor, cooling water pressure Sensor, return water temperature sensor, pressure of return water sensor and ambient air temperature sensor are connected with controller input terminal, wind Machine frequency converter and pump variable frequency device are connected with controller output end.

Further, the cooling tower is equipped with 3, and water supply line I passes through changing for water supply branch and each cooling tower respectively Hot coil water outlet communicates.

Further, the cooling water pump is equipped with 1-6.

Further, the cooling water pump is equipped with 3-6, wherein the power of 1 cooling water pump is other cooling water pump works The 50%-75% of rate value.

Further, cooling water pipeline is divided into two sections by the cooling water filtering device, cooling water filtering device difference Connected by flange with two sections of cooling water pipelines, cooling water filtering device includes chimney filter and filter core, and filter core is arranged inside chimney filter.

Further, the filter core is made of polypropylene, is set as cylindrical, through-hole is equipped between two bottom surfaces.

Further, the ambient air temperature sensor is fixed on inside plastic net cover.

Compared with prior art, the utility model has the following beneficial effects:

(1) permanent magnetism piece is set in each pipeline, using permanent magnetism piece magnetic softening water quality, prevents each inner wall of the pipe from generating water Dirt；

(2) sped structure is set by cooling tower heat exchange coil inner wall, the performance expanded with heat and contract with cold using copper pipe is further Prevent heat exchange coil inner wall scale from covering；

(3) shutter is set above cooling tower, increases the rate of heat exchange inside cooling tower between external air, drop Low fan energy consumption；

(4) cooling water filtering device, good seal, convenient disassembly, convenient for fixed are arranged by flange on cooling water pipeline Phase cleaning；

(5) blower fan of cooling tower frequency converter and cooling water pump frequency converter are adjusted by controller in real time, is especially adopted It is pumped with a small-power, is more easier so that adjusting, save the power consumption of cooling water pump and blower fan of cooling tower；

(6) outside air temperature value is acquired, adjusts cooling tower heat exchange coil water outlet water flow temperature, control according to the temperature value Precision processed is high, improves process operation reliability and stability.

(7) increase mixed water vacuum tank, not only ensure that the stabilization of ductwork pressure, improve process operation reliability and stabilization Property, also cooling water pump operating condition can be made more stable, to guarantee that cooling water pump always works in high efficient district, reduce energy consumption.

(8) by adjusting the aperture of bypass motorized adjustment water valve, cooling water pump Real time Efficiency is kept to be in peak, simultaneously Cooling water by adjusting bypass mixes in advance with the high-temperature water by heat exchanger to cool down.

Detailed description of the invention

The structural schematic diagram of Fig. 1 the utility model.

In figure: 1, fan frequency converter；2, blower；3, heat exchange coil；4, water return pipeline；5, water supply line I；6, power-operated shutter Window；7, pressure of return water sensor；8, return water temperature sensor；9, controller；10, heat exchanger；11, expansion valve；12, cooling water mistake Filter device；13, cooling water pipeline；14, cooling-water temperature sensor；15, cooling water pressure force snesor；16, pump variable frequency device； 17, cooling water pump；18, pump capacity meter；19, water supply line II；20, cooling pond；21, ambient temperature sensor；22, it sprays Pipeline；23, cooling tower；24, water vacuum tank is mixed；25, air valve；26, motorized adjustment water valve is bypassed；27, bypass is adjusted；28, other Road check valve.

Specific embodiment

With reference to embodiments and the technical solution of the utility model is described in detail in respective drawings, so that this field Technical staff can be more clearly understood the embodiment of the utility model, but and be not so limited the protection model of the utility model It encloses.

As shown in Figure 1, a kind of constant pressure water supply type industry cooling water circulation system that band bypass is adjusted, including cooling tower 23, Cooling water pump 17, mixed water vacuum tank 24, expansion valve 11, heat exchanger 10, controller 9, frequency converter, temperature sensor, pressure sensing The water outlet of device and pump capacity meter 18, the cooling water pump 17 is connected to by mixed water vacuum tank 24 with cooling water pipeline 13, The top of the mixed water vacuum tank 24 is equipped with air valve 25, and the cooling water pipeline 13 and water return pipeline 4 are connected with tune Section bypass 27, the adjusting, which bypasses, has been sequentially connected with bypass motorized adjustment water valve 26 and bypass check valve 28 in 27, bypass is electric Dynamic water adjusting valve 26 is electrically connected with controller 9, and bypass check valve 28 guarantees that the water (flow) direction in pipeline is flowed from cooling water pipeline 13 To water return pipeline 4.Cooling water pump 17 is equipped with pump variable frequency device 16, and cooling tower 23 is equipped with blower 2 and heat exchange coil 3, corresponding blower 2 Fan frequency converter 1 is set, electric-powered shutter 6 is set above 23 tower body of cooling tower, 3 inner wall of heat exchange coil uses helicitic texture, spiral shell Line spacing be 4-5.5mm, depth of thread 0.3-0.45mm, 3 water outlet of heat exchange coil pass through water supply line I5 and cooling pond 20 communicate, and cooling pond 20 is communicated by water supply line II19 with 17 entrance of cooling water pump, and 17 water outlet of cooling water pump, mixed water are steady Pressure tank 24, expansion valve 11,10 water inlet of heat exchanger sequentially pass through cooling water pipeline 13 and communicate, and 10 water outlet of heat exchanger passes through return water Pipeline 4 is communicated with 3 water inlet of heat exchange coil, and cooling water filtering device 12 is arranged on cooling water pipeline 13, and cooling water pump 17 is discharged Mouth setting pump capacity meter, heat exchange coil 3, water supply line I5, water supply line II19, cooling water pipeline 13 and water return pipeline 4 divide Not Nei Qian permanent magnetism piece, cooling-water temperature sensor 14 and cooling water pressure force snesor 15, return pipe are set on cooling water pipeline 13 Return water temperature sensor 8 is set on road 4 and pressure of return water sensor 7, ambient air temperature sensor 21 are fixed on cooling tower 23 In external air, pump capacity meter 18, cooling-water temperature sensor 14, cooling water pressure force snesor 15, return water temperature sensing Device 8, pressure of return water sensor 7 and ambient air temperature sensor 21 are connected with 9 input terminal of controller, fan frequency converter 1 and water Pump frequency conversion device 16 is connected with 9 output end of controller.

Wherein, cooling tower 23 is equipped with 3, and water supply line I5 passes through water supply branch and each cooling tower heat exchange coil 3 respectively Communicate, 23 bottom of cooling tower is equipped with sink, and feeding spraying pump water inlet communicates with sink, feeding spraying pump water outlet pass through pipeline with it is cold But 23 top spray pipeline 22 of tower communicates, on the one hand the high-temperature water in heat exchange coil 3 passes through the shower water cooling of spray piping 22, On the other hand heat in cooling tower 23 is drained into outside air by blower 2, the cooling water pump 17 is equipped with 1-6, control Device 9, according to 17 flow of cooling water pipeline 13 and 4 temperature difference of water return pipeline and cooling water pump, adjusts cooling in Dynamic Regulating Process Water pump 17 needs the number of units opened, and saves the energy consumption that cooling water pump 17 is run；The cooling water filtering device is by cooling water pipeline 13 are divided into two sections, and cooling water filtering device 12 is connected by flange with two sections of cooling water pipelines 13 respectively, cooling water filtering dress Setting 12 includes chimney filter and filter core, and filter core is arranged inside chimney filter, and filter core is made of polypropylene, is set as cylindrical, two bottom surfaces it Between be equipped with through-hole, setting through-hole can make cooling water flow fast through cooling water filtering device on filter core, chimney filter by flange with it is cold But waterpipe is connected, and one side sealing effect is good, and leakage will not occur in cooling water cycle process, on the other hand, easy to disassemble, Filter core can be replaced with periodic cleaning；Ambient air temperature sensor is fixed on inside plastic net cover, on the one hand plastic net cover allows Ambient air temperature sensor measures the temperature of external air, on the other hand plays protection to ambient air temperature sensor and makees With prolonging its service life.

The working principle of the utility model are as follows:

Cooling water passes through 23 heat exchange coil of cooling tower, 3 water outlet first and enters water supply line I5, then passes through water supply line I5 enters cooling pond 20, and 17 water inlet of cooling water pump extracts the cooling water in cooling pond 20, water by water supply line II19 Pump discharge meter 18 measures the flow of 17 water outlet of cooling water pump, and at the same time, cooling-water temperature sensor 14 measures cooling water pipe 13 water flow temperature of road, cooling water pressure force snesor 15 measure 13 pressure of supply water of cooling water pipe, and cooling water is by mixing water vacuum tank 24 Enter expansion valve 11 with cooling water pipeline 13, expansion valve 11 keeps the cooling water in cooling water pipeline low as low temperature by its throttling The moist steam of pressure, then moist steam absorbs heat in heat exchanger 10, strengthens refrigeration effect, to prevent from generating after cooling water is heated Scale is covered in each inner wall of the pipe, and cooling water filtering device 12, mistake are arranged between 17 water outlet of expansion valve 11 and cooling water pump Filter the impurity in cooling water.In addition, in water supply line I, water supply line II, cooling water pipeline 13, water return pipeline 4 and heat exchange plate Permanent magnetism piece is embedded in pipe 3, and water is softened using the magnetism of permanent magnetism piece, prevents inner wall of the pipe from having scale to cover；In view of heat exchange plate The fabulous heating conduction of pipe 3 passes through heat exchanger 10 because of the effect expanded with heat and contract with cold in 3 inner wall of heat exchange coil setting helicitic texture High-temperature water into heat exchange coil 3 can make 3 rapid expanding of heat exchange coil, in the effect of 23 blower 2 and spray piping 22 of cooling tower Under, heat exchange coil 3 and fast cooling are shunk, and helicitic texture can be broken having a little scale on pipeline when shrinking It splits and falls, and temporarily collected by cooling water filtering device, then periodic cleaning, similarly, 10 heat exchange pipeline inner wall of heat exchanger It can be set to sped structure, thus thoroughly prevent the generation of scale in each pipeline.

For the dynamic regulation for realizing system, frequency converter is arranged to cooling water pump 17 and 23 blower 2 of cooling tower respectively, passes through change Frequency device realizes the adjusting of cooling water pump water flow and blower fan of cooling tower revolving speed, and the electric-powered shutter being arranged above cooling tower can increase Add the exchange velocity inside cooling tower with external air, the cooling tower relative to not electric-powered shutter can be substantially reduced blower Energy consumption, in use, cooling-water temperature sensor 14 measures 13 water flow temperature of cooling water pipeline, cooling water pressure force snesor 15 is measured 13 pressure of supply water of cooling water pipeline, return water temperature sensor 8 measure 4 water flow temperature of water return pipeline, and pressure of return water sensor 7 measures 8 pressure of return water of water return pipeline, ambient air temperature sensor 21 measure 23 ambient air temperature of cooling tower, and pump capacity meter 18 is logical Supercooling water pump 17 runs electric signal and 17 proper property curve of cooling water pump, output 17 real-time traffic of cooling water pump and in real time effect Rate, above-mentioned data are transmitted separately to controller 9, the preferred PLC of controller 9, according to cooling water and return water temperature difference and water pump stream Amount calculates 10 heat exchange amount of heat exchanger, 16 frequency of pump variable frequency device is adjusted, and then change 17 flow of cooling water pump, in adjustment process In, the aperture of bypass motorized adjustment water valve 26 is adjusted, keeps 17 Real time Efficiency of cooling water pump to be in peak, while passing through adjusting The cooling water of bypass 27 mixes in advance with the high-temperature water by heat exchanger 10 to cool down, while maintaining in cooling water pipeline 13 Cooling water pressure can satisfy heat exchange and need, and guarantee heat exchanger efficient operation state, and the energy consumption for reducing cooling water pump 17 disappears It is steady to mix water in addition, mixed water vacuum tank 24, expansion valve 11 are arranged between 17 water outlet of cooling water pump and heat exchanger water inlet 10 for consumption Pressure tank 24 has not only carried out mixed water and cooling to cooling water again, but also ductwork pressure is more stable, improves process operation Reliability and stability also can make the pressure of cooling water pump water outlet more stable, to guarantee that cooling water pump always works in height Area to be imitated, energy consumption is reduced, expansion valve 11, which makes in cooling water pipeline 13 cooling water throttle by it, becomes the moist steam of low-temp low-pressure, Then moist steam absorbs heat in heat exchanger 10, strengthens refrigeration effect.In addition, the air valve installed at the top of mixed water vacuum tank 24 25, for excluding the gas in mixed water vacuum tank 24, ensure that appearance has a power failure, termination of pumping pipeline is born in time in pipeline operating Pressure can cause the phenomenon that pipe vibration or rupture.

In system operation, when the cooling water pump 17 is equipped with 3-6, wherein the power of 1 cooling water pump is other The 50%-75% of cooling water pump performance number is pumped especially with a small-power, is more easier so that adjusting, and guarantees cooling water pump High efficient district is always worked in, the power consumption of cooling water pump is saved.

In system operation, ambient air temperature sensor 21 detects outside air temperature, and controller 9 is according to extraneous empty Temperature degree, adjusts the supply water temperature on water supply line I5, i.e. 3 water outlet water temperature of heat exchange coil, this temperature value can pass through adjusting 23 fan frequency converter 1 of cooling tower is realized.

The embodiments of the present invention is explained in detail in conjunction with attached drawing above, but the utility model is not limited to institute The embodiment of description.For the ordinary skill in the art, the case where not departing from the principle and spirit of the invention Under to these embodiments carry out it is a variety of variation, modification, replacement and deformation still fall within it is within the protection scope of the present utility model.

Claims (8)

1. a kind of constant pressure water supply type industry cooling water circulation system that band bypass is adjusted, including cooling tower (23), cooling water pump (17), cooling water pipeline (13), water return pipeline (4), heat exchanger (10) and controller (9), which is characterized in that the cooling The water outlet of water pump (17) is connected to by mixed water vacuum tank (24) with cooling water pipeline (13), the mixed water vacuum tank (24) Top is equipped with air valve (25), and the cooling water pipeline (13) and water return pipeline (4) are connected with adjusting bypass (27), described Adjusting bypass (27) in be sequentially connected with bypass motorized adjustment water valve (26) and bypass check valve (28), bypass electric adjustable it is water-saving Valve (26) is electrically connected with controller (9), and bypass check valve (28) guarantees that the water (flow) direction in pipeline is flowed from cooling water pipeline (13) To water return pipeline (4).

2. a kind of constant pressure water supply type industry cooling water circulation system that band bypass is adjusted according to claim 1, feature It is, the cooling water pump (17) is equipped with pump variable frequency device (16), and cooling tower (23) is equipped with blower (2) and heat exchange coil (3), Electric-powered shutter (6) are arranged in corresponding blower (2) setting fan frequency converter (1), cooling tower (23) tower body top, heat exchange coil (3) Inner wall uses helicitic texture, and flight pitch is 4~5.5mm, and the depth of thread is 0.3~0.45mm, and heat exchange coil (3) water outlet is logical It crosses water supply line I (5) to communicate with cooling pond (20), cooling pond (20) pass through water supply line II (19) and cooling water pump (17) Entrance communicates, and cooling water pump (17) water outlet, mixed water vacuum tank (24), expansion valve (11), heat exchanger (10) water inlet sequentially lead to Supercooled water pipeline (13) communicates, and heat exchanger (10) water outlet is communicated by water return pipeline (4) with heat exchange coil (3) water inlet, It is arranged on cooling water pipeline (13) cooling water filtering device (12), pump capacity meter (18) are arranged in cooling water pump (17) water outlet, Heat exchange coil (3), water supply line I (5), water supply line II (19), cooling water pipeline (13) and water return pipeline (4) embed forever respectively Cooling-water temperature sensor (14) and cooling water pressure force snesor (15), water return pipeline are arranged on cooling water pipeline (13) for magnetic sheet (4) return water temperature sensor (8) are set on and pressure of return water sensor (7), ambient air temperature sensor (21) are fixed on cold But in the external air of tower (23), pump capacity meter (18), cooling-water temperature sensor (14), cooling water pressure force snesor (15), return water temperature sensor (8), pressure of return water sensor (7) and ambient air temperature sensor (21) and controller (9) are defeated Enter end to be connected, fan frequency converter (1) and pump variable frequency device (16) are connected with controller (9) output end.

3. a kind of constant pressure water supply type industry cooling water circulation system that band bypass is adjusted according to claim 2, feature It is, the cooling tower (23) is equipped with 3, and water supply line I (5) passes through the heat exchange of water supply branch and each cooling tower (23) respectively Coil pipe (3) water outlet communicates.

4. a kind of constant pressure water supply type industry cooling water circulation system that band bypass is adjusted according to claim 3, feature It is, the cooling water pump (17) is equipped with 1-6.

5. a kind of constant pressure water supply type industry cooling water circulation system that band bypass is adjusted according to claim 3, feature It is, the cooling water pump (17) is equipped with 3-6, wherein the power of 1 cooling water pump is other cooling water pump performance numbers 50%-75%。

6. a kind of constant pressure water supply type industry cooling water circulation system that band bypass is adjusted according to claim 4 or 5, special Sign is that cooling water pipeline (13) is divided into two sections by the cooling water filtering device (12), cooling water filtering device (12) point Not Tong Guo flange connect with two sections of cooling water pipelines (13), cooling water filtering device (12) include chimney filter and filter core, filter core setting Inside chimney filter.

7. a kind of constant pressure water supply type industry cooling water circulation system that band bypass is adjusted according to claim 6, feature It is, the filter core is made of polypropylene, is set as cylindrical, through-hole is equipped between two bottom surfaces.

8. a kind of constant pressure water supply type industry cooling water circulation system that band bypass is adjusted according to claim 7, feature It is, the ambient air temperature sensor (21) is fixed on inside plastic net cover.