CN104913510A - Printing and dyeing heat treatment machine control device and control method thereof - Google Patents
Printing and dyeing heat treatment machine control device and control method thereof Download PDFInfo
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Abstract
The invention discloses a printing and dyeing heat treatment machine control device and a control method thereof, and relates to a control device of a heat pump fluid heater utilizing printing and dyeing wastewater waste heat and a control method of the control device, in particular to a control device of a printing and dyeing wastewater heat treatment machine with a three-water-tank double-channel cycle heat pump hot water unit and a control method for the control device. The printing and dyeing heat treatment machine control device comprises an operation parameter setting module, a water volume detection control module, a water temperature detection control module, a heat pump controller and an electromagnetic valve driver. The operation parameter setting module is connected to the water volume detection control module and the water temperature detection control module. A liquid level sensor is connected to the water volume detection control module. A first water temperature sensor, a second water temperature sensor and a water outlet temperature sensor are connected to the input end of the water temperature detection control module. The water temperature detection control module is connected to a first electromagnetic valve, a second electromagnetic valve and a three-way valve through the electromagnetic valve driver. The control device controls the opening of a water volume adjusting valve according to the wastewater temperature of a wastewater pool, so that small-temperature-difference turbulence heat exchange is achieved, and hot water is obtained by the aid of the printing and dyeing wastewater waste heat.
Description
Technical field
The present invention relates to control device and the control method thereof of the heat pump fluid heater utilizing dyeing waste water waste heat, particularly relate to a kind of control device of dyeing waste water heat-treating machine and the control method for this control device that possess three-tank two-way circulating heat pump Hot water units.
Background technology
In the production process of printing and dyeing enterprise, need with a large amount of production hot water of boiler heating supply, production hot water mainly contains two kinds of temperature requirements: more than 40 DEG C and more than 60 DEG C.On the other hand, add the technique hot and cold waters such as subsequent rinse, can produce again the higher spent hot water of more temperature in production process, water temperature is at 35 ~ 70 DEG C.Usually can not reuse after these spent hot waters produce, directly can only be discharged to afterwards in environment in the process making corresponding requirements, the waste heat in these waste water not only can not utilize, and may produce thermal pollution on the contrary to environment.COD concentration simultaneously in dyeing waste water and chlorine ion concentration very high, simple recuperation of heat is difficult to be used.Existing hot water, steam, cold water, waste water flow process are as shown in Figure 1, in the flow process shown in Fig. 1, on the one hand, the water entered printing and dyeing production equipment 10 (dye vat) from softening pond 11 is low-temperature cold water, water temperature only has 5 ~ 20 DEG C usually, need heating could meet the temperature requirement of dyeing and printing process, heating boiler mostly is steam boiler, coal-burning boiler or electric boiler, and this kind of mode of heating is non-energy saving standard mode.On the other hand, enter the waste water that the temperature of wastewater disposal basin 20 is higher, must after cooling bay 12 cools, biochemical treatment tank 13 could be sent into and carry out biochemical treatment, these used heat are not only not used, on the contrary to environment produce thermal pollution, and cooling and course of conveying also need consumption electric energy.
Chinese invention patent " a kind of energy-saving printing and dyeing water utilization method of recycling waste heat and system " (Chinese invention patent ZL200610027350.2, Authorization Notice No. CN100586868C) disclose a kind of energy-saving printing and dyeing water utilization method and system of recycling waste heat, system comprises cold water storage cistern, explained hereafter equipment, waste water mixing pit, waste water source source pump, hot-tub and biochemical treatment tank, feature is: because explained hereafter equipment enters the various waste heat clean waters produced in production process in waste water mixing pit, pump into waste water source source pump recovery used heat through waste water pump again and hot water is heated into the cold water in waste heat tank, through hot water transfer pump, hot water is pumped into explained hereafter equipment for production again, form the energy-saving printing and dyeing water utilization system of recycling waste heat, its method comprises: the clean remaining hot water that explained hereafter equipment is discharged is taken in waste water mixing pit, use waste water source source pump to reclaim waste heat cold water, hot water is stored in hot-tub, hot water supply explained hereafter equipment use in hot-tub.This invention obviously can save energy consumption, and improves the temperature difference entering the cold water-steam of explained hereafter equipment, and heating tube road junction is not damaged because of expansion.But there is following defect in the prior art scheme:
1, this technical scheme is by the clean remaining hot water in waste water mixing pit, send into conventional waste water source source pump and reclaim waste heat cold water, heat exchanger due to common waste water source source pump cannot accept unholiness or containing aggressive chemistry waste liquid spent hot water, and this technical scheme is difficult to the actual requirement meeting dyeing waste water recuperation of heat.
2, because a heat hot pump hot water machine of routine adopts water regulating valve to control water temperature, in order to meet the water temperature requirement of dyeing process, water regulating valve will be in low discharge state to produce high-temperature-hot-water always, this not only causes the heat exchange effect of condenser poor, the heating capacity of source pump and efficiency degradation, and the aperture of the water regulating valve being in low discharge state is very little, be easy to because blocking causes unit to cause discharge abnormal and disorderly closedown;
3, conventional waste water source source pump produces high-temperature-hot-water to be needed to operate in high load region always, and the life of product of source pump can also be subject to larger impact.
Summary of the invention
The object of the invention is to provide a kind of control device for heat-treating machine of printing and dyeing, for controlling the operation of printing and dyeing heat-treating machine, ensure that printing and dyeing heat-treating machine leaving water temperature meets dyeing and printing process requirement and not by the impact of flow of inlet water, solves the above-mentioned technical problem of existing printing and dyeing heat-treating machine.The technical solution adopted in the present invention is:
A kind of printing and dyeing heat-treating machine control device, operation for possessing the printing and dyeing heat-treating machine of three-tank two-way circulating heat pump Hot water units controls, described three-tank two-way circulating heat pump Hot water units comprises the first circulating pump, the first cyclic water tank, the second cyclic water tank and heat storage water tank, and the first magnetic valve, the second magnetic valve and triple valve; Be provided with refrigerant reheater and water inlet preheater in the wastewater disposal basin of described printing and dyeing heat-treating machine, water inlet preheater is connected in cold water inlet road, and refrigerant reheater, by the second circulating pump, is connected to the heating agent water route of heat-pump hot-water unit evaporimeter; It is characterized in that:
Described control device comprises operating parameter setting module, water yield detection control module, water temperature detection control module, heat pump controller and electromagnetic valve driver;
Described operating parameter setting model calling is to water yield detection control module and water temperature detection control module, liquid level sensor is connected to the input of water yield detection control module, the output of water yield detection control module is connected to the input of heat pump controller, and the output of heat pump controller is connected to the compressor of source pump, the first circulating pump and the second circulating pump; Water yield detection control module is also connected to electromagnetic valve driver by heat pump controller;
First cooling-water temperature sensor, the second cooling-water temperature sensor and leaving water temperature sensors are connected to the input of water temperature detection control module; The output of water temperature detection control module, by electromagnetic valve driver, is connected to the drive coil of the first magnetic valve, the second magnetic valve and triple valve;
Described water yield detection control module detects the liquid level of heat storage water tank, when liquid level is lower than water level lower limit, controls source pump and starts, hot water preparing from the first heat cycles loop; When liquid level arrives water level higher limit, it is out of service that described water yield detection control module controls source pump, closes the first magnetic valve and the second magnetic valve simultaneously, stops water inlet;
Described described printing and dyeing heat-treating machine control device performs following steps by circulation and produces constant-temperature hot water continuously:
S10: water temperature detection control module detects the first water tank water temperature, the leaving water temperature of the gentle triplet constant temperature hot-water line of the second Water in Water Tank;
S20: when the first water tank water temperature reaches set water temperature, triple valve switches to a-c mouth connected state from a-b mouth connected state, enters the second heat cycles loop running status; Meanwhile, the first magnetic valve is opened, and utilizing cold water intake pressure and hot and cold water temperature difference gravity, by completing the constant-temperature hot water of heating in the first cyclic water tank, pushing up in heat storage water tank;
S30: when the second water tank water temperature reaches set water temperature, triple valve switches to a-b mouth connected state from a-c mouth connected state, returns the first heat cycles loop running status; Meanwhile, the second magnetic valve is opened, and utilizing cold water intake pressure and hot and cold water temperature difference gravity, by completing the constant-temperature hot water of heating in the second cyclic water tank, pushing up in heat storage water tank;
S40: when entering the first cyclic water tank or the second cyclic water tank cold water makes leaving water temperature lower than set water temperature, water temperature detection control module controls the first magnetic valve and the second closed electromagnetic valve, stops cold water water inlet.
The one preferably technical scheme of printing and dyeing heat-treating machine control device of the present invention, is characterized in that the first described cooling-water temperature sensor and the second cooling-water temperature sensor, is separately positioned on the bottom of the first cyclic water tank and the second cyclic water tank; Described leaving water temperature sensors is arranged on the exit passageway of triplet constant temperature hot-water line, and described liquid level sensor is arranged on the inside of heat storage water tank.
The better technical scheme of one of printing and dyeing heat-treating machine control device of the present invention, it is characterized in that the cold water inlet road of described water inlet pre-heater inlet is provided with water regulating valve, described control device also comprises flow-control module; Be arranged on the wastewater temperature sensor in wastewater disposal basin, be connected to the input of flow-control module; Described control device obtains wastewater temperature by wastewater temperature sensor, according to the wastewater temperature of wastewater disposal basin, controls the aperture of water regulating valve, makes to be not more than 2 DEG C into the leaving water temperature of water preheater and the temperature difference of wastewater temperature, realize little temperature difference turbulent-flow heat-exchanging.
Another object of the present invention to provide a kind of control method for above-mentioned printing and dyeing heat-treating machine control device.The present invention solves the problems of the technologies described above adopted technical scheme:
For a control method for above-mentioned printing and dyeing heat-treating machine control device, it is characterized in that comprising the following steps:
S100: operating parameter setting module obtains water temperature setting value, water level higher limit and water level lower limit;
S200: water yield detection control module detects heat storage water tank liquid level;
S220: if heat storage water tank liquid level >=water level lower limit, close first and second magnetic valve, source pump is shut down, and returns step S200; Otherwise, go to step S240;
S240: if heat storage water tank liquid level < water level lower limit, source pump starts, and triple valve switches to a-b mouth connected state; Go to step S300;
S300: water temperature detection control module detects the first water tank water temperature, the leaving water temperature of the gentle triplet constant temperature hot-water line of the second Water in Water Tank;
S320: if leaving water temperature < set water temperature, the first magnetic valve and the second closed electromagnetic valve, stop cold water water inlet;
S340: if the first water tank water temperature > set water temperature, triple valve switches to a-c mouth connected state, and the first magnetic valve is opened, and goes to step S200; Otherwise, go to step S360;
S360: if the second water tank water temperature > set water temperature, triple valve switches to a-b mouth connected state, the second magnetic valve is opened, and goes to step S200; Otherwise, go to step S300.
The invention has the beneficial effects as follows:
1, printing and dyeing heat-treating machine of the present invention and control method thereof, use Teflon capillary radiation recuperator as the refrigerant reheater and the water inlet preheater that absorb dyeing waste water waste heat, the three-tank two-way circulating heat pump Hot water units hot water preparing utilizing temperature control to switch, adopt R134a environment friendly refrigerating fluid, can ensure that leaving water temperature reaches any design temperature of less than 85 DEG C, and not by the impact of flow of inlet water, ensure stability and the continuation of dyeing process hot water.
2, printing and dyeing heat-treating machine of the present invention and control method thereof, the aperture of water regulating valve is controlled according to wastewater temperature, by regulating flow of inlet water, make leaving water temperature into water preheater close to wastewater temperature, realize little temperature difference turbulent-flow heat-exchanging, both can ensure that running water fully carries out elementary recuperation of heat, can improve again the heat exchange effect of condenser.
3, printing and dyeing heat-treating machine of the present invention and control method thereof, utilizes dyeing waste water waste heat to produce hot water needed for production technology, can reduce wastewater temperature; reduce used heat to pollute; omit the power consumption of cooling tower and waste water cooling of charge pump, save operating cost, be conducive to protection human lives and ecological environment.Equipment failure rate reduces, and system stability, structure are simple, and promotion is strong.
Accompanying drawing explanation
Fig. 1 is the waste water residual heat handling process schematic diagram of existing dyeing and printing process;
Fig. 2 is the structural representation of the printing and dyeing heat-treating machine possessing three-tank two-way circulating heat pump Hot water units;
Fig. 3 is the schematic diagram of printing and dyeing heat-treating machine control device of the present invention;
Fig. 4 is the control method flow chart of printing and dyeing heat-treating machine control device of the present invention.
The label of each parts in above figure: 10-printing and dyeing production equipment (dye vat), 11-softens pond, 12-cooling bay, 13-biochemical treatment tank, 1-compressor, 2-evaporimeter, 20-wastewater disposal basin, 21-refrigerant reheater, 22-is intake preheater, 3-condenser, 30-water regulating valve, 31-first magnetic valve, 32-second magnetic valve, 33-triple valve, 4-first circulating pump, 40-heat storage water tank, 41-first cyclic water tank, 42-second cyclic water tank, 43-triplet constant temperature hot-water line, 5-restricting element, 51-fluid reservoir, 52-filter, 6-gas-liquid separator, 7-second circulating pump, 8-control device, 80-liquid level sensor, 81-first cooling-water temperature sensor, 82-second cooling-water temperature sensor, 83-leaving water temperature sensors, 84-wastewater temperature sensor, 800-operating parameter setting module, 810-water yield detection control module, 820-water temperature detection control module, 830-heat pump controller, 840-electromagnetic valve driver, 850-flow-control module.
Detailed description of the invention
In order to technique scheme of the present invention can be understood better, describe in detail further below in conjunction with drawings and Examples.Fig. 2 is an embodiment of printing and dyeing heat-treating machine of the present invention, comprise the source pump that compressor 1, evaporimeter 2, condenser 3, restricting element 5 and gas-liquid separator 6 connect to form, the first circulating pump 4 be communicated with the water route of condenser 3 and heat storage water tank 40, store the wastewater disposal basin 20 of dyeing and printing process waste discharge, and control the control device 8 of heat pump water-heating machine operation;
As shown in Figure 2, described heat storage water tank 40 is connected to the first cyclic water tank 41 and the second cyclic water tank 42 by a triplet constant temperature hot-water line 43, and pass through the connection control of the first magnetic valve 31, second magnetic valve 32 and triple valve 33, form the three-tank two-way circulating heat pump Hot water units of temperature control switching according to following connected mode:
The circulation water inlet at the first cyclic water tank 41 and the second cyclic water tank 42 top is parallel-connected to the delivery port of condenser 3; Circulating outlet bottom first cyclic water tank 41 and the second cyclic water tank 42 is connected respectively to b mouth and the c mouth of triple valve 33, the a mouth of triple valve 33 is connected to the water inlet of condenser 3 by the first circulating pump 4, form the first heat cycles loop and the second heat cycles loop that triple valve 33 controls switching, wherein:
First heat cycles loop: condenser-> first cyclic water tank-> triple valve b mouth-> triple valve a mouth-> first circulating pump-> condenser;
Second heat cycles loop: condenser-> second cyclic water tank-> triple valve c mouth-> triple valve a mouth-> first circulating pump-> condenser;
Cooling water inlet bottom first cyclic water tank 41 and the second cyclic water tank 42, respectively by the first magnetic valve 31 and the second magnetic valve 32, is connected to cold water inlet road; The hot water outlet at the first cyclic water tank 41 and the second cyclic water tank 42 top, is connected to heat storage water tank 40 by triplet constant temperature hot-water line 43, forms the first constant-temperature effluent passage and the second constant-temperature effluent passage of the first magnetic valve 31 and the control of the second magnetic valve 32, wherein:
First constant-temperature effluent passage: cold water water inlet-> first magnetic valve-> first cyclic water tank-> triplet constant temperature hot-water line-> heat storage water tank;
Second constant-temperature effluent passage: cold water water inlet-> second magnetic valve-> second cyclic water tank-> triplet constant temperature hot-water line-> heat storage water tank;
The refrigerant reheater 21 and water inlet preheater 22 that absorb waste water residual heat is provided with in described wastewater disposal basin 20; The water inlet of described refrigerant reheater 21 and delivery port, be connected to the heating agent water route of evaporimeter 2, utilize the waste water residual heat that heat medium water absorbs by the second circulating pump 7, make the cold-producing medium thermal evaporation again in evaporimeter 2; Described water inlet preheater 22 is connected in the cold water inlet road of the first magnetic valve 31 and the second magnetic valve 32 entrance, utilizes waste water residual heat preheating to enter the cold water of three-tank two-way circulating heat pump Hot water units; The waste heat of dyeing waste water passes to the cold-producing medium in evaporimeter 2 by heat medium water, the recycling refrigerant circulation of source pump and the hot water circuit of three-tank two-way circulating heat pump Hot water units, transfer in the high-temperature-hot-water that source pump produces, realize recycling of waste-rwater produced by dye printing waste heat; The cold water entering preheater 22 can be running water, also can be the softening cold water for printing and dyeing production equipment 10, as depicted in figs. 1 and 2.
Described printing and dyeing heat-treating machine performs following steps by circulation and produces constant-temperature hot water continuously:
S1: when the water of the first cyclic water tank 41 li is after the first heat cycles loop heating to set water temperature Tsd, described control device 8 is by controlling the conducting state of triple valve 33, circulating water flow is switched to the second heat cycles loop, open the first magnetic valve 31 simultaneously, by the hot water in the first cyclic water tank 41, be transported in heat storage water tank 40 by the first constant-temperature effluent passage;
S2: when the water of the second cyclic water tank 42 li is after the second heat cycles loop heating to set water temperature Tsd, described control device 8 is by controlling the conducting state of triple valve 33, circulating water flow is switched to the first heat cycles loop, open the second magnetic valve 32 simultaneously, by the hot water in the second cyclic water tank 42, be transported in heat storage water tank 40 by the second constant-temperature effluent passage;
S3: when the leaving water temperature Tcs flowing through triplet constant temperature hot-water line 43 is lower than set water temperature Tsd, described control device 8 controls to cut out the first magnetic valve 31 or the second magnetic valve 32 being in open mode, stop the water not reaching set water temperature Tsd to flow into heat storage water tank 40, thus ensure that the water temperature of heat storage water tank 40 keeps constant.
In the embodiment of the printing and dyeing heat-treating machine of the present invention shown in Fig. 2, in the bottom of the first cyclic water tank 41 and the second cyclic water tank 42, the first cooling-water temperature sensor 81 and the second cooling-water temperature sensor 82 is set respectively; At the exit passageway of triplet constant temperature hot-water line 43, set out water temperature sensor 83, liquid level sensor 80 is set in the inside of heat storage water tank 40; Described control device 8 is connected to liquid level sensor 80, and the liquid level Wyw according to heat storage water tank 40 controls starting or stoping of source pump; Described control device 8 is connected to the first cooling-water temperature sensor 81, second cooling-water temperature sensor 82 and leaving water temperature sensors 83, control the first magnetic valve 31, second magnetic valve 32 and triple valve 33 according to the gentle leaving water temperature of Water in Water Tank, realize the three-tank two-way circulating heat pump Hot water units that temperature control switches.
In the embodiment of the printing and dyeing heat-treating machine of the present invention shown in Fig. 2, wastewater temperature sensor 84 is provided with in described wastewater disposal basin 20, the cold water inlet road of described water inlet preheater 22 entrance is provided with water regulating valve 30, described control device 8 obtains wastewater temperature by wastewater temperature sensor 84, wastewater temperature according to wastewater disposal basin 20 controls the water yield, regulate flow of inlet water to make to be not more than 2 DEG C into the leaving water temperature of water preheater and the temperature difference of wastewater temperature, realize little temperature difference turbulent-flow heat-exchanging.Because the circulating water flow of source pump is not directly through heat storage water tank 40, printing and dyeing heat-treating machine of the present invention can ensure that leaving water temperature reaches the various demand temperature of less than 85 degree, and the aperture of wastewater temperature and water regulating valve 30 can not affect leaving water temperature.
In the embodiment of the printing and dyeing heat-treating machine of the present invention shown in Fig. 2, described restricting element 5 is electric expansion valves, from the on high-tension side cold-producing medium of compressor 1, the low-pressure side of compressor 1 got back to by the refrigerant line of the condenser 3 passed through successively, fluid reservoir 51, filter 52 and gas-liquid separator 6, forms refrigerant circulation loop; Described control device 8 regulates the internal circulating load of cold-producing medium by the aperture controlling electric expansion valve.
According to an embodiment of printing and dyeing heat-treating machine of the present invention, first cyclic water tank 41 and the second cyclic water tank 42 are two water tanks with capacity, its capacity is per hourly under nominal condition heat 1/4 ~ 1/8 of the water yield, in the present embodiment, the capacity of the first cyclic water tank 41 and the second cyclic water tank 42 is per hourly under nominal condition heat 1/6 of the water yield; The capacity of heat storage water tank 40 is greater than the difference that unit hour under unit hour peak heat water demand and nominal condition heats the water yield, to ensure can provide enough hot water continuously in the water use peak period.
According to an embodiment of printing and dyeing heat-treating machine of the present invention, described refrigerant reheater 21 and water inlet preheater 22 are Teflon capillary radiation recuperator, and each capillary radiation recuperator comprises at least one group of Teflon tube bank; Described Teflon tube bank is made up of the many Teflon capillaries be connected in parallel, and the two ends of Teflon capillary are connected in parallel respectively, forms water inlet and the delivery port of heat exchanger; Described Teflon tube bank coiling is immersed in wastewater disposal basin 20, flows through the clean water of capillary, absorbed the heat of waste water by capillary wall from wastewater disposal basin 20 via water inlet and delivery port; External diameter≤the 6mm of single Teflon capillary, capillary wall thickness is 0.3 ~ 0.6mm, and the quantity of Teflon capillary and single channel operation length depend on flow required for capillary radiation recuperator and heat exchange area.According to the present invention's preferred embodiment, the external diameter of single Teflon capillary is 5.72mm, and thickness is 0.5mm, and single channel operation length is 25 meters.Because Teflon material has the chemical stability of height and excellent resistance to ag(e)ing, all strong acid can be born, comprise chloroazotic acid, hydrofluoric acid, concentrated hydrochloric acid, nitric acid, oleum, organic acid etc., the effect of highly basic, strong oxidizer, reducing agent and various organic solvent, in addition Teflon material has extremely low coefficient of friction, surface is adsorption fouling thing not easily, can ensure heat exchange effect.Therefore, Teflon capillary radiation recuperator is very suitable is placed in the high rotten printing and dyeing waste liquid of high temperature, for a long time as the heat exchanger absorbing dyeing waste water waste heat.
An embodiment of the control device 8 of printing and dyeing heat-treating machine of the present invention as shown in Figure 3, comprises operating parameter setting module 800, water yield detection control module 810, water temperature detection control module 820, heat pump controller 830 and electromagnetic valve driver 840;
Described operating parameter setting module 800 is connected to water yield detection control module 810 and water temperature detection control module 820;
Liquid level sensor 80 is connected to the input of water yield detection control module 810, the output of water yield detection control module 810 is connected to the input of heat pump controller 830, and the output of heat pump controller 830 is connected to the motor of compressor 1, first circulating pump 4 and the first circulating pump 7; Water yield detection control module 810 is also connected to electromagnetic valve driver 840 by heat pump controller 830;
First cooling-water temperature sensor 81, second cooling-water temperature sensor 82 and leaving water temperature sensors 83 are connected to the input of water temperature detection control module 820; The output of water temperature detection control module 820, by electromagnetic valve driver 840, is connected to the drive coil of the first magnetic valve 31, second magnetic valve 32 and triple valve 33;
Described water yield detection control module 810 detects the liquid level Wyw of heat storage water tank 40, when liquid level Wyw is lower than water level lower limit Wxx, controls source pump and starts, hot water preparing from the first heat cycles loop; When liquid level Wyw arrives water level higher limit Wsx, it is out of service that described water yield detection control module 810 controls source pump, closes the first magnetic valve 31 and the second magnetic valve 32 simultaneously, stops water inlet;
Described described printing and dyeing heat-treating machine control device performs following steps by circulation and produces constant-temperature hot water continuously:
S10: water temperature detection control module 820 detects the first water tank water temperature Ts1, the leaving water temperature Tcs of the second water tank water temperature Ts2 and triplet constant temperature hot-water line;
S20: when the first water tank water temperature Ts1 reaches set water temperature Tsd, triple valve 33 switches to a-c mouth connected state from a-b mouth connected state, enters the second heat cycles loop running status; Meanwhile, the first magnetic valve 31 is opened, and utilizes cold water intake pressure and hot and cold water temperature difference gravity, will complete the constant-temperature hot water of heating in the first cyclic water tank 41, in top to heat storage water tank 40;
S30: when the second water tank water temperature Ts2 reaches set water temperature Tsd, triple valve 33 switches to a-b mouth connected state from a-c mouth connected state, returns the first heat cycles loop running status; Meanwhile, the second magnetic valve 32 is opened, and utilizes cold water intake pressure and hot and cold water temperature difference gravity, will complete the constant-temperature hot water of heating in the second cyclic water tank 42, in top to heat storage water tank 40;
S40: when entering the first cyclic water tank 41 or the second cyclic water tank 42 cold water makes leaving water temperature Tcs lower than set water temperature Tsd, water temperature detection control module 820 controls the first magnetic valve 31 and the second magnetic valve 32 cuts out, stops cold water water inlet.
In the embodiment of the control device of the printing and dyeing heat-treating machine shown in Fig. 3, the cold water inlet road of described water inlet preheater 22 entrance is provided with water regulating valve 30, and described control device 8 also comprises flow-control module 850; Be arranged on the wastewater temperature sensor 84 in wastewater disposal basin 20, be connected to the input of flow-control module 850; Described control device 8 obtains wastewater temperature by wastewater temperature sensor 84, according to the wastewater temperature of wastewater disposal basin 20, control the aperture of water regulating valve 30, make to be not more than 2 DEG C into the leaving water temperature of water preheater and the temperature difference of wastewater temperature, realize little temperature difference turbulent-flow heat-exchanging.
Fig. 4 is the embodiment of the control method flow chart of printing and dyeing heat-treating machine control device of the present invention, and described control device adopts chip microprocessor to control, and its control procedure comprises the following steps:
S100: operating parameter setting module obtains water temperature setting value Tsd, water level higher limit Wsx and water level lower limit Wxx;
S200: water yield detection control module detects heat storage water tank liquid level Wyw;
S220: if heat storage water tank liquid level Wyw >=water level lower limit Wsx, close first and second magnetic valve, source pump is shut down, and compressor, the first circulating pump and the second circulating pump are out of service, return step S200; Otherwise, go to step S240;
S240: if heat storage water tank liquid level Wyw < water level lower limit Wxx, source pump starts, and compressor, the first circulating pump and the second circulating pump bring into operation, and triple valve switches to a-b mouth connected state; Go to step S300;
S300: water temperature detection control module detects the first water tank water temperature Ts1, the leaving water temperature Tcs of the second water tank water temperature Ts2 and triplet constant temperature hot-water line;
S320: if leaving water temperature Tcs < set water temperature Tsd, water temperature detection control module closes the first magnetic valve and the second magnetic valve, stops cold water water inlet; According to a preferred embodiment of printing and dyeing heat-treating machine control method of the present invention, in order to improve temperature controlled stability, control device 8 cuts out the first magnetic valve and the second magnetic valve when lower than set water temperature Tsd 1 DEG C of leaving water temperature Tcs.
S340: if the first water tank water temperature Tc1 > set water temperature Tsd, water temperature detection control module controls triple valve and switches to a-c mouth connected state, and the first magnetic valve is opened, and goes to step S200; Otherwise, go to step S360;
S360: if the second water tank water temperature Tc2 > set water temperature Tsd, water temperature detection control module controls triple valve and switches to a-b mouth connected state, and the second magnetic valve is opened, and goes to step S200; Otherwise, go to step S300.
Those of ordinary skill in the art will be appreciated that; above embodiment is only used to technical scheme of the present invention is described; and be not used as limitation of the invention; any the above embodiment is done based on connotation of the present invention change, modification, all will drop in the protection domain of claim of the present invention.
Claims (4)
1. a printing and dyeing heat-treating machine control device, operation for possessing the printing and dyeing heat-treating machine of three-tank two-way circulating heat pump Hot water units controls, described three-tank two-way circulating heat pump Hot water units comprises the first circulating pump, the first cyclic water tank, the second cyclic water tank and heat storage water tank, and the first magnetic valve, the second magnetic valve and triple valve; Be provided with refrigerant reheater and water inlet preheater in the wastewater disposal basin of described printing and dyeing heat-treating machine, water inlet preheater is connected in cold water inlet road, and refrigerant reheater, by the second circulating pump, is connected to the heating agent water route of heat-pump hot-water unit evaporimeter; It is characterized in that:
Described control device comprises operating parameter setting module, water yield detection control module, water temperature detection control module, heat pump controller and electromagnetic valve driver;
Described operating parameter setting model calling is to water yield detection control module and water temperature detection control module, liquid level sensor is connected to the input of water yield detection control module, the output of water yield detection control module is connected to the input of heat pump controller, and the output of heat pump controller is connected to the compressor of source pump, the first circulating pump and the second circulating pump; Water yield detection control module is also connected to electromagnetic valve driver by heat pump controller;
First cooling-water temperature sensor, the second cooling-water temperature sensor and leaving water temperature sensors are connected to the input of water temperature detection control module; The output of water temperature detection control module, by electromagnetic valve driver, is connected to the drive coil of the first magnetic valve, the second magnetic valve and triple valve;
Described water yield detection control module detects the liquid level of heat storage water tank, when liquid level is lower than water level lower limit, controls source pump and starts, hot water preparing from the first heat cycles loop; When liquid level arrives water level higher limit, it is out of service that described water yield detection control module controls source pump, closes the first magnetic valve and the second magnetic valve simultaneously, stops water inlet;
Described described printing and dyeing heat-treating machine control device performs following steps by circulation and produces constant-temperature hot water continuously:
S10: water temperature detection control module detects the first water tank water temperature, the leaving water temperature of the gentle triplet constant temperature hot-water line of the second Water in Water Tank;
S20: when the first water tank water temperature reaches set water temperature, triple valve switches to a-c mouth connected state from a-b mouth connected state, enters the second heat cycles loop running status; Meanwhile, the first magnetic valve is opened, and utilizing cold water intake pressure and hot and cold water temperature difference gravity, by completing the constant-temperature hot water of heating in the first cyclic water tank, pushing up in heat storage water tank;
S30: when the second water tank water temperature reaches set water temperature, triple valve switches to a-b mouth connected state from a-c mouth connected state, returns the first heat cycles loop running status; Meanwhile, the second magnetic valve is opened, and utilizing cold water intake pressure and hot and cold water temperature difference gravity, by completing the constant-temperature hot water of heating in the second cyclic water tank, pushing up in heat storage water tank;
S40: when entering the first cyclic water tank or the second cyclic water tank cold water makes leaving water temperature lower than set water temperature, water temperature detection control module controls the first magnetic valve and the second closed electromagnetic valve, stops cold water water inlet.
2. printing and dyeing heat-treating machine control device according to claim 1, is characterized in that the first described cooling-water temperature sensor and the second cooling-water temperature sensor, is separately positioned on the bottom of the first cyclic water tank and the second cyclic water tank; Described leaving water temperature sensors is arranged on the exit passageway of triplet constant temperature hot-water line, and described liquid level sensor is arranged on the inside of heat storage water tank.
3. printing and dyeing heat-treating machine control device according to claim 1, it is characterized in that the cold water inlet road of described water inlet pre-heater inlet is provided with water regulating valve, described control device also comprises flow-control module; Be arranged on the wastewater temperature sensor in wastewater disposal basin, be connected to the input of flow-control module; Described control device obtains wastewater temperature by wastewater temperature sensor, according to the wastewater temperature of wastewater disposal basin, controls the aperture of water regulating valve, makes to be not more than 2 DEG C into the leaving water temperature of water preheater and the temperature difference of wastewater temperature, realize little temperature difference turbulent-flow heat-exchanging.
4., for a control method for the printing and dyeing heat-treating machine control device described in claim 1,2 or 3, it is characterized in that comprising the following steps:
S100: operating parameter setting module obtains water temperature setting value, water level higher limit and water level lower limit;
S200: water yield detection control module detects heat storage water tank liquid level;
S220: if heat storage water tank liquid level >=water level lower limit, close first and second magnetic valve, source pump is shut down, and returns step S200; Otherwise, go to step S240;
S240: if heat storage water tank liquid level < water level lower limit, source pump starts, and triple valve switches to a-b mouth connected state; Go to step S300;
S300: water temperature detection control module detects the first water tank water temperature, the leaving water temperature of the gentle triplet constant temperature hot-water line of the second Water in Water Tank;
S320: if leaving water temperature < set water temperature, the first magnetic valve and the second closed electromagnetic valve, stop cold water water inlet;
S340: if the first water tank water temperature > set water temperature, triple valve switches to a-c mouth connected state, and the first magnetic valve is opened, and goes to step S200; Otherwise, go to step S360;
S360: if the second water tank water temperature > set water temperature, triple valve switches to a-b mouth connected state, the second magnetic valve is opened, and goes to step S200; Otherwise, go to step S300.
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