Cold and hot demand coupling type waste heat recovery system, control method and storage medium

Abstract

The invention discloses a cold and heat demand coupling type waste heat recovery system, a control method and a storage medium. The cold and heat demand coupling type waste heat recovery system comprises a plurality of heat supply loops, a plurality of cold supply loops and a controller. A first temperature sensor is arranged on a water outlet pipe of the leaf storage room to obtain a first temperature; a third temperature sensor is arranged on a water outlet pipe at the heat absorption end of the heat exchanger to obtain a third temperature; the controller controls opening and closing of a heat supply loop and a cold supply loop according to the first temperature and the third temperature; the water source heat pump supplies heat to the tobacco leaf storage room and supplies cold to the tobacco shred storage room at the same time, cold and heat complementation of the tobacco leaf storage room and the tobacco shred storage room is achieved, the water inlet temperature of the low-temperature side of the water source heat pump is improved through the heat exchanger, and therefore the system energy efficiency is improved; the air source heat pump is arranged, relative cold and heat sources are supplemented in time when the cold and heat requirements of the system are not equal, and stable operation of the system is guaranteed; by arranging various heat supply loops and cold supply loops, heat supply in winter and heat supply and cold supply in summer can be met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste heat recovery, in particular to a cold-heat demand coupled waste heat recovery system, a control method and a storage medium. BACKGROUND

[0002] The annual comprehensive energy consumption of the tobacco industry reaches 2300 million tons of standard coal, among which the independent interval leaf storage room or pre-arrangement room needs heating all year round, such as tobacco leaf warming and humidification, the silk storage room needs cooling in summer and heating in winter. In order to maintain the stable temperature and humidity of the workshop, the traditional process adopts independent systems to supply cooling and heating respectively, and the cooling and heating systems are not connected, which leads to serious mismatch and waste of energy.

[0003] At the same time, a large amount of high-temperature waste gas is generated in the cigarette production, and a large amount of high-temperature wastewater can be obtained after treatment by the washing tower, which has great heat recovery potential.

[0004] However, the existing system does not establish a dynamic matching mechanism of cold-heat demand, and the waste gas waste heat and the refrigeration waste heat, such as the heat dissipation of the main machine, are directly discharged, which cannot realize cascade utilization, resulting in high energy consumption of the boiler and high energy consumption of the refrigeration unit. SUMMARY

[0005] In order to solve the problems of the traditional process that independent systems are used to supply cooling and heating respectively to maintain the stable temperature and humidity of the workshop, the cooling and heating systems are not connected, which leads to serious mismatch and waste of energy, and the heat energy of the high-temperature wastewater of the washing tower is wasted, the present application provides a cold-heat demand coupled waste heat recovery system, a control method and a storage medium.

[0006] The present application adopts the following technical solutions: The present application provides a cold-heat demand coupled waste heat recovery system in the first aspect, which comprises: a first heating circuit, a second heating circuit, a third heating circuit, a fourth heating circuit, a fifth heating circuit, a sixth heating circuit, a first cooling circuit and a second cooling circuit; The first heating circuit comprises a heating outlet water pipe of a water source heat pump, a leaf storage room and a heating inlet water pipe of the water source heat pump connected in sequence; The second heating circuit comprises a heating outlet water pipe of the water source heat pump, the leaf storage room, a heat absorption end of a heat exchanger, an air source heat pump and a heating inlet water pipe of the water source heat pump connected in sequence; The third heating circuit comprises a heating outlet water pipe of the water source heat pump, the leaf storage room, the heat absorption end of the heat exchanger and the heating inlet water pipe of the water source heat pump connected in sequence; The fourth heating circuit comprises a water outlet pipe of the heat absorption end of the heat exchanger, a heating branch and a water inlet pipe of the heat absorption end of the heat exchanger connected in sequence; The heating branch comprises a hot water input end, and the hot water input end inputs hot water which flows out of the leaf storage room and the silk storage room and converges; The fifth heat supply circuit comprises the fourth heat supply circuit, and the water outlet pipe of the air source heat pump, the heat supply branch, and the water inlet pipe of the air source heat pump connected in sequence; The sixth heat supply circuit comprises the water outlet pipe of the air source heat pump, the heat supply branch, the heat absorption end of the heat exchanger, and the water inlet pipe of the air source heat pump connected in sequence; The first cooling supply circuit comprises the cooling water outlet pipe of the water source heat pump, the leaf storage room, and the cooling water inlet pipe of the water source heat pump connected in sequence; The second cooling supply circuit comprises the cooling water outlet pipe of the water source heat pump, the leaf storage room, the air source heat pump, and the cooling water inlet pipe of the water source heat pump connected in sequence; The water outlet pipe of the leaf storage room is provided with a first temperature sensor to obtain a first temperature; The water outlet pipe of the heat absorption end of the heat exchanger is provided with a third temperature sensor to obtain a third temperature; The cold-heat demand coupled waste heat recovery system is further provided with a controller, which controls the opening and closing of the heat supply circuit and the cooling supply circuit according to the first temperature and the third temperature.

[0007] According to the cold-heat demand coupled waste heat recovery system, the cooling water outlet pipe of the water source heat pump is provided with a second temperature sensor to obtain a second temperature.

[0008] According to the cold-heat demand coupled waste heat recovery system, the cooling water inlet pipe of the water source heat pump is provided with a third water pump; The cooling water inlet pipe of the water source heat pump is provided with a first water pump; The water inlet pipe of the air source heat pump is provided with a second water pump.

[0009] According to the cold-heat demand coupled waste heat recovery system, the water outlet pipe of the heat absorption end of the heat exchanger of the second heat supply circuit is connected to the water inlet pipe of the air source heat pump in sequence through an eleventh electric regulating valve and a sixth electric regulating valve, and the water outlet pipe of the air source heat pump is connected to the cooling water inlet pipe of the water source heat pump in sequence through an eighth electric regulating valve and a fifteenth electric regulating valve; The water outlet pipe of the heat absorption end of the heat exchanger of the third heat supply circuit is connected to the cooling water inlet pipe of the water source heat pump in sequence through a tenth electric regulating valve and the fifteenth electric regulating valve; The hot water input end of the heat supply branch is connected to the water inlet pipe of the leaf storage room in one way, and connected to the water inlet pipe between the silk storage room and the leaf storage room in another way through a first electric regulating valve, and the water outlet pipe of the silk storage room is connected to the water outlet pipe of the leaf storage room through a third electric regulating valve; The heat absorption end of the heat exchanger of the fourth heat supply circuit is connected to the hot water input end of the heat supply branch through the tenth electric regulating valve; The outlet pipe of the heat storage room of the fifth heat supply circuit flows into the heat absorbing end of the heat exchanger, and the other way flows into the air source heat pump through the ninth electric regulating valve and the sixth electric regulating valve, and the outlet pipe of the air source heat pump flows into the heat water input end of the heat supply branch after the heat water of the outlet pipe of the heat exchanger and the outlet pipe of the air source heat pump flow together through the eighth electric regulating valve and the tenth electric regulating valve; The outlet pipe of the heat absorbing end of the heat exchanger of the sixth heat supply circuit is connected with the water inlet pipe of the air source heat pump through the eleventh electric regulating valve and the sixth electric regulating valve, and the outlet pipe of the air source heat pump is connected with the heat water input end of the heat supply branch through the eighth electric regulating valve and the fifteenth electric regulating valve; The controller controls the opening and closing of the electric regulating valve, and then controls the opening and closing of the heat supply circuit.

[0010] According to the cold and heat demand coupling type waste heat recovery system, the cooling water outlet pipe of the water source heat pump of the first cooling circuit is connected with the water inlet pipe of the silk storage room through the second electric regulating valve, the water outlet pipe of the silk storage room is connected with the water inlet pipe of the air source heat pump through the fourth electric regulating valve and the fifth electric regulating valve, and the water outlet pipe of the air source heat pump is connected with the cooling water inlet pipe of the water source heat pump through the sixteenth electric regulating valve; The cooling water outlet pipe of the water source heat pump of the second cooling circuit is connected with the water inlet pipe of the silk storage room through the second electric regulating valve, and the water outlet pipe of the silk storage room is connected with the cooling water inlet pipe of the water source heat pump through the fourth electric regulating valve; The controller controls the opening and closing of the electric regulating valve, and then controls the opening and closing of the cooling circuit.

[0011] According to the cold and heat demand coupling type waste heat recovery system, the cold and heat demand coupling type waste heat recovery system further comprises a washing tower, and the circulating outlet of the blowdown pipe of the washing tower is connected with the circulating inlet of the blowdown pipe through the twelfth electric regulating valve, the fourth water pump, the heat source end of the heat exchanger and the thirteenth electric regulating valve in sequence, so that the hot water of the heat absorbing end of the heat exchanger is heated by the sewage. The circulating outlet and the circulating inlet of the blowdown pipe are further provided with the fourteenth electric regulating valve. When the hot water of the heat absorbing end of the heat exchanger needs to be heated, the controller controls the twelfth electric regulating valve and the thirteenth electric regulating valve to be opened and controls the fourteenth electric regulating valve to be closed; on the contrary, the controller controls the twelfth electric regulating valve and the thirteenth electric regulating valve to be closed and controls the fourteenth electric regulating valve to be opened, so as to realize the functions of blowdown and heating.

[0012] The second aspect of the present application provides a control method of a cold-heat demand coupled waste heat recovery system, comprising the following steps: obtaining a current operation mode, and a first temperature and a third temperature; controlling the opening and closing of a heating circuit and a cooling circuit according to the current operation mode, the first temperature and the third temperature.

[0013] According to the control method, if the current operation mode is a summer mode, the first heating circuit and the second cooling circuit are opened, and the second temperature is obtained through a second temperature sensor located at a cooling water outlet pipe of the water source heat pump; When the first temperature is greater than the first target temperature, the frequency of a third water pump at a heating water inlet pipe of the water source heat pump, the water source heat pump and a first water pump at a cooling water inlet pipe of the water source heat pump is reduced until the first temperature is equal to the first target temperature, at the same time, the second cooling circuit is closed, the first cooling circuit is opened and the frequency of a second water pump at a water inlet pipe of the air source heat pump is increased to maintain the second temperature equal to the second target temperature; When the first temperature is less than the first target temperature and the third temperature is less than the target heating temperature, the frequency of the third water pump, the water source heat pump and the first water pump is maintained to maintain the second temperature equal to the second target temperature, at the same time, the first heating circuit is closed, the second heating circuit is opened and the frequency of the second water pump is increased until the first temperature is equal to the first target temperature; When the first temperature is less than the first target temperature and the third temperature is greater than or equal to the target heating temperature, the first heating circuit is closed and the third heating circuit is opened until the first temperature is equal to the first target temperature; if at this time, the first temperature is less than the first target temperature for a continuous first preset time, the third heating circuit is closed and the second heating circuit is opened until the first temperature is equal to the first target temperature.

[0014] According to the control method, if the current operation mode is a winter mode, the fourth heating circuit is opened; When the first temperature is less than the first target temperature and the third temperature is greater than or equal to the target heating temperature, the fourth heating mode is closed, the fifth heating mode is opened and the frequency of the second water pump at the water inlet pipe of the air source heat pump is increased until the first temperature is equal to the first target temperature; When the first temperature is less than the first target temperature and the third temperature is less than the target heating temperature, the fourth heating mode is closed, the sixth heating mode is opened and the frequency of the second water pump is increased until the first temperature is equal to the first target temperature.

[0015] The third aspect of the present application provides a storage medium, which comprises a stored program, wherein when the program runs, the device where the storage medium is located executes the above-mentioned control method.

[0016] Compared with the prior art, the present application has at least the following beneficial effects: The present application provides heat to the leaf storage room and cooling to the silk storage room by water source heat pump, instead of the traditional scheme of separate heating by boiler and separate cooling by water chiller unit, to realize cold-heat complementation between the leaf storage room and the silk storage room, and to improve the water inlet temperature at the low temperature side of the water source heat pump through the heat exchanger, thereby improving the system energy efficiency, and to provide air source heat pump to realize the unequal cooling and heating demand of the system and to supplement the relative cold and heat source in time to ensure stable operation of the system; the present application can meet the heating in winter and the heating and cooling in summer by providing multiple heating circuits and cooling circuits. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 The principle diagram of the cold-heat demand coupled waste heat recovery system of the present application; Figure 2 The principle diagram of the cold-heat demand coupled waste heat recovery system of the present application comprising a first heating circuit and a first cooling circuit; Figure 3 The principle diagram of the cold-heat demand coupled waste heat recovery system of the present application comprising a second heating circuit and a second cooling circuit; Figure 4 The principle diagram of the cold-heat demand coupled waste heat recovery system of the present application comprising a third heating circuit and a second cooling circuit; Figure 5 The principle diagram of the cold-heat demand coupled waste heat recovery system of the present application comprising a fourth heating circuit; Figure 6 The principle diagram of the cold-heat demand coupled waste heat recovery system of the present application comprising a fifth heating circuit; Figure 7 The principle diagram of the cold-heat demand coupled waste heat recovery system of the present application comprising a sixth heating circuit; In the figure: 1, leaf storage room; 2, first temperature sensor; 3, water source heat pump; 4, first electric regulating valve; 5, second electric regulating valve; 6, third electric regulating valve; 7, fourth electric regulating valve; 8, silk storage room; 9, second temperature sensor; 10, first water pump; 11, air source heat pump; 12, second water pump; 13, fifth electric regulating valve; 14, sixth electric regulating valve; 15, seventh electric regulating valve; 16, eighth electric regulating valve; 17, third water pump; 18, ninth electric regulating valve; 19, tenth electric regulating valve; 20, eleventh electric regulating valve; 21, third temperature sensor; 22, plate heat exchanger; 23, twelfth electric regulating valve; 24, thirteenth electric regulating valve; 25, blowdown outlet; 26, fourteenth electric regulating valve; 27, low-temperature waste gas outlet; 28, washing tower; 29, high-temperature waste gas outlet; 30, fourth water pump; 31, fifth water pump; 32, fifteenth electric regulating valve; 33, sixteenth electric regulating valve. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and not intended to be limiting on the present disclosure and its applications or uses. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of the present disclosure.

[0020] Unless otherwise specifically stated, the relative arrangements of parts and steps, numerical expressions, and numerical values set forth in the examples contained herein are only meant to be illustrative and not limiting of the scope of the present disclosure.

[0021] Meanwhile, it should be understood that the sizes of the various portions shown in the drawings are not drawn to scale for the sake of convenience.

[0022] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, the described techniques, methods, and apparatus should be considered as being part of the specification.

[0023] In all of the compositions and methods shown and discussed herein, any specific numerical value, as explicitly stated or as implied by its context, should be interpreted as merely an example, and not as a limitation of the scope of the exemplary embodiments. Thus, other examples of the exemplary embodiments can have different values.

[0024] It should be noted that like reference numerals and letters in the various figures indicate similar items, and thus, once any item is defined in one figure, it should not have to be discussed further in subsequent figures.

[0025] To solve the problem of energy waste caused by mismatching of cold and heat demand in traditional schemes, as shown in Figure 1 Embodiment 1 of the present application provides a cold and heat demand coupled waste heat recovery system, which comprises a first heat supply circuit, a second heat supply circuit, a third heat supply circuit, a first cold supply circuit and a second cold supply circuit.

[0026] The first heat supply circuit comprises a heat supply outlet pipe of a water source heat pump 3, a leaf storage room 1 and a heat supply inlet pipe of the water source heat pump 3 connected in sequence.

[0027] The second heat supply circuit comprises a heat supply outlet pipe of the water source heat pump 3, the leaf storage room 1, a heat absorption end of a heat exchanger 22, an air source heat pump 11 and a heat supply inlet pipe of the water source heat pump 3 connected in sequence.

[0028] The third heat supply circuit comprises a heat supply outlet pipe of the water source heat pump 3, the leaf storage room 1, a heat absorption end of the heat exchanger 22 and a heat supply inlet pipe of the water source heat pump 3 connected in sequence.

[0029] The fourth heat supply circuit comprises a water outlet pipe of the heat absorption end of the heat exchanger 22, a heat supply branch and a water inlet pipe of the heat absorption end of the heat exchanger 22 connected in sequence.

[0030] The heat supply branch comprises a hot water input end, and the hot water input end inputs hot water which flows out through the leaf storage room 1 and the leaf storage room 8 and converges.

[0031] The fifth heat supply circuit comprises the fourth heat supply circuit and a water outlet pipe of the air source heat pump 11, a heat supply branch and a water inlet pipe of the air source heat pump 11 connected in sequence.

[0032] The sixth heat supply circuit comprises a water outlet pipe of the air source heat pump 11, a heat supply branch, a heat absorption end of the heat exchanger 22 and a water inlet pipe of the air source heat pump 11 connected in sequence.

[0033] The first cold supply circuit comprises a cold supply outlet pipe of the water source heat pump 3, the leaf storage room 1 and a cold supply inlet pipe of the water source heat pump 3 connected in sequence.

[0034] The second cold supply circuit comprises a cold supply outlet pipe of the water source heat pump 3, the leaf storage room 1, the air source heat pump 11 and a cold supply inlet pipe of the water source heat pump 3 connected in sequence.

[0035] The water outlet pipe of the leaf storage room 1 is provided with a first temperature sensor 2 to obtain a first temperature.

[0036] The water outlet pipe of the heat absorption end of the heat exchanger 22 is provided with a third temperature sensor 21 to obtain a third temperature.

[0037] The cold and heat demand coupled waste heat recovery system further comprises a controller, which controls the opening and closing of the heat supply circuit and the cold supply circuit according to the first temperature T1 and the third temperature T3.

[0038] Preferably but not limitedly, the heat exchanger 22 can be selected as a plate heat exchanger.

[0039] The present application provides heat to the leaf storage room and cooling to the silk storage room by water source heat pump, instead of the traditional scheme of separate heating by boiler and separate cooling by water cooling unit, realizes cold-heat complementation between the leaf storage room and the silk storage room, and improves the water inlet temperature at the low temperature side of the water source heat pump through the heat exchanger, so as to improve the energy efficiency of the system, and provides air source heat pump to realize the unequal cooling and heating demand of the system and timely supplement the relative cold and heat source, and ensure the stable operation of the system.

[0040] Preferably but not limitedly, the water outlet pipe of the water source heat pump 3 is provided with a second temperature sensor 9 to obtain the second temperature.

[0041] The present application can directly control the cooling of the silk storage room 8 by setting the second temperature sensor.

[0042] Preferably but not limitedly, the air source heat pump 11 is in the cooling circuit, and then performs refrigeration, and is in the heating circuit, and then performs heating.

[0043] Preferably but not limitedly, the water inlet pipe of the water source heat pump 3 is provided with a first water pump 10; The water inlet pipe of the air source heat pump 11 is provided with a second water pump 12; The water inlet pipe of the heat exchanger 22 of the third heating circuit is provided with a fifth water pump 31. The water inlet pipe of the heat exchanger 22 of the third heating circuit is provided with a fifth water pump 31.

[0044] The present application can control the water flow and directly adjust the cooling and heating capacity by setting multiple water pumps.

[0045] Preferably but not limitedly, the water outlet pipe of the heat exchanger 22 of the second heating circuit is connected to the water inlet pipe of the air source heat pump 11 in sequence through the eleventh electric regulating valve 20, the sixth electric regulating valve 14, and the water outlet pipe of the air source heat pump 11 is connected to the water inlet pipe of the water source heat pump 3 in sequence through the eighth electric regulating valve 16 and the fifteenth electric regulating valve 32.

[0046] Preferably but not limitedly, the water outlet pipe of the heat exchanger 22 of the third heating circuit is connected to the water inlet pipe of the water source heat pump 3 in sequence through the tenth electric regulating valve 19 and the fifteenth electric regulating valve 32.

[0047] Preferably but not limitedly, the hot water input end of the heat supply branch is connected to the water inlet pipe of the leaf storage room 1, and the other end is connected to the water inlet pipe of the silk storage room 8 through the first electric regulating valve 4. The water outlet pipe of the silk storage room 8 is connected to the water outlet pipe of the leaf storage room 1 through the third electric regulating valve 6.

[0048] Preferably but not limitedly, the heat absorbing end of the heat exchanger 22 of the fourth heat supply circuit is connected to the hot water input end of the heat supply branch through the tenth electric regulating valve 19.

[0049] Preferably but not limitedly, the water outlet pipe of the leaf storage room 1 of the fifth heat supply circuit is connected to the heat absorbing end of the heat exchanger 22, and the other end is connected to the air source heat pump 11 through the ninth electric regulating valve 18 and the sixth electric regulating valve 14. The water outlet pipe of the air source heat pump 11 is connected to the water outlet pipe of the heat absorbing end of the heat exchanger 22 through the eighth electric regulating valve 16, and the water outlet pipe of the heat exchanger 22 is connected to the hot water input end of the heat supply branch through the tenth electric regulating valve 19.

[0050] Preferably but not limitedly, the water outlet pipe of the heat absorbing end of the heat exchanger 22 of the sixth heat supply circuit is connected to the water inlet pipe of the air source heat pump 11 through the eleventh electric regulating valve 20, the sixth electric regulating valve 14, and the water inlet pipe of the air source heat pump 11. The water outlet pipe of the air source heat pump 11 is connected to the hot water input end of the heat supply branch through the eighth electric regulating valve 16 and the fifteenth electric regulating valve 32.

[0051] The controller controls the opening and closing of the heat supply circuit by controlling the opening and closing of the electric regulating valve.

[0052] The present application can accurately and quickly switch to the required heat supply circuit at the moment by controlling the opening and closing of the heat supply circuit through multiple electric regulating valves.

[0053] Preferably but not limitedly, the cooling water outlet pipe of the water source heat pump 3 of the first cooling circuit is connected to the water inlet pipe of the silk storage room 8 through the second electric regulating valve 5, the water outlet pipe of the silk storage room 8 is connected to the water inlet pipe of the air source heat pump 11 through the fourth electric regulating valve 7 and the fifth electric regulating valve 13, and the water outlet pipe of the air source heat pump 11 is connected to the cooling water inlet pipe of the water source heat pump 3 through the sixteenth electric regulating valve 33.

[0054] Preferably but not limitedly, the cooling water outlet pipe of the water source heat pump 3 of the second cooling circuit is connected to the water inlet pipe of the silk storage room 8 through the second electric regulating valve 5, and the water outlet pipe of the silk storage room 8 is connected to the cooling water inlet pipe of the water source heat pump 3 through the fourth electric regulating valve 7.

[0055] The controller controls the opening and closing of the cooling circuit by controlling the opening and closing of the electric regulating valve.

[0056] The application can accurately and quickly switch to the required cooling circuit by controlling the opening and closing of the cooling circuit through multiple electric regulating valves.

[0057] Preferably but not limitedly, the cold-heat demand coupled waste heat recovery system further comprises a washing tower 28, a circulating outlet P1 of a blowdown pipe of the washing tower 28 is connected with a circulating inlet P2 of the blowdown pipe in sequence through a twelfth electric regulating valve 23, a fourth water pump 30, a heat source end of the heat exchanger 22, a thirteenth electric regulating valve 24, so as to heat the hot water of the heat absorbing end of the heat exchanger 22 with sewage.

[0058] A fourteenth electric regulating valve 26 is further arranged between the circulating outlet P1 and the circulating inlet P2 of the blowdown pipe.

[0059] When it is required to heat the hot water of the heat absorbing end of the heat exchanger 22, the controller controls the twelfth electric regulating valve 23 and the thirteenth electric regulating valve 24 to be opened, and controls the fourteenth electric regulating valve 26 to be closed; on the contrary, the controller controls the twelfth electric regulating valve 23 and the thirteenth electric regulating valve 24 to be closed, and controls the fourteenth electric regulating valve 26 to be opened, so as to realize the functions of blowdown and heating.

[0060] The application improves the energy efficiency ratio of the system by discharging the high heat in the blowdown pipe of the washing tower 28 to heat the hot water of the heat absorbing end of the heat exchanger 22.

[0061] Preferably but not limitedly, the washing tower 28 is further provided with a low-temperature waste gas outlet 27 and a high-temperature waste gas outlet 29 to discharge waste gas.

[0062] Preferably but not limitedly, the cold-heat demand coupled waste heat recovery system further comprises a third cooling circuit. The third cooling circuit comprises the second cooling circuit, and a water outlet pipe of the silk storage room 8, the air source heat pump 11 and the cooling water outlet pipe of the water source heat pump 3 connected in sequence.

[0063] The cooling water output by the cooling water outlet pipe of the water source heat pump 3 of the third cooling circuit passes through the second electric regulating valve 5, the silk storage room 8 and the fourth and fifth electric regulating valves 13 and 7 in sequence, and then directly enters the cooling water inlet pipe of the water source heat pump 3, or passes through the air source heat pump 11 and the seventh electric regulating valve 15 in sequence and then converges with the cooling water outlet pipe of the water source heat pump 3.

[0064] The principle of the cold-heat demand coupled waste heat recovery system is as follows: The water source heat pump 3 directly connects the heat-using room 1 and the cold-using room 8, and directly cools and heats. The air source heat pump 11 functions as direct cooling for the silk storage room 8 and direct heating for the leaf storage room 1 in summer, and direct heating for the leaf storage room 1 and the silk storage room 8 in winter; in combination with the heat exchanger 22 to recover the waste heat of the washing tower 28, direct heating or low-temperature hot water heating for the air source heat pump 11 can be realized.

[0065] The present application takes the lack of heat in the leaf storage room 1 as the main control direction, and the problem of simultaneous lack of heat and cold in the leaf storage room 1 and the silk storage room 8 does not exist.

[0066] The present application precisely controls the water inlet temperature of the equipment, so that the water outlet temperature of the equipment is a stable value by default.

[0067] As shown in Figures 2-7 The control method of the cold-heat demand coupled waste heat recovery system provided by Embodiment 2 of the present application comprises the following steps: Step S210, obtaining the current operation mode, and the first temperature T1 and the third temperature T3.

[0068] Step S220, controlling the opening and closing of the heating circuit and the cooling circuit according to the current operation mode, the first temperature T1 and the third temperature T3.

[0069] The present application precisely controls the cold and heat of the leaf storage room 1 and the silk storage room 8 by obtaining the current operation mode, the first temperature T1 and the third temperature T3, to meet the cold and heat demand.

[0070] Preferably but not limitedly, if the current operation mode is the summer mode, the first heating circuit and the second cooling circuit are started, and the second temperature T2 is obtained.

[0071] As shown in Figure 2 When the first temperature T1 is greater than the first target temperature t1, the third water pump 17, the water source heat pump 3 and the first water pump 10 are frequency-reduced until the first temperature T1 is equal to the first target temperature t1, at the same time, the second cooling circuit is closed, the first cooling circuit is started and the second water pump 12 is frequency-increased, at this time, the air source heat pump 11 is in the cooling mode, to maintain that the second temperature T2 is equal to the second target temperature t2; As shown in Figure 3 When the first temperature T1 is less than the first target temperature t1 and the third temperature T3 is less than the target heating temperature t, the frequency of the third water pump 17, the water source heat pump 3 and the first water pump 10 is maintained to maintain that the second temperature T2 is equal to the second target temperature t2, at the same time, the first heating circuit is closed, the second heating circuit is started and the second water pump 12 is frequency-increased, at this time, the air source heat pump 11 is in the heating mode, the hot water returns through the heat exchanger 22 to be heated again before entering the air source heat pump 11 to be heated, until the first temperature T1 is equal to the first target temperature t1; As shown in Figure 4As shown, when the first temperature T1 is less than the first target temperature t1 and the third temperature T3 is greater than or equal to the target heating temperature t, the first heating circuit is closed and the third heating circuit is opened. The hot water return water is heated through the plate heat exchanger 22 until the first temperature T1 is equal to the first target temperature t1. If, at this time, the first temperature T1 is continuously less than the first target temperature t1 for a first preset time, the third heating circuit is closed and the second heating circuit is opened until the first temperature T1 is equal to the first target temperature t1.

[0072] Step S130, as shown in Figure 5, if the current operating mode is winter mode, the fourth heating circuit is turned on. At this time, the air source heat pump 11 is in heating mode. After the hot water return water is heated by the plate heat exchanger 22, it directly obtains qualified hot water at a temperature of t and directly supplies heat to the leaf storage room 1 and the wire storage room 8.

[0073] like Figure 6 As shown, when the first temperature T1 is less than the first target temperature t1, and the third temperature T3 is greater than or equal to the target heating temperature t1, the fourth heating mode is turned off, the fifth heating mode is turned on, and the second water pump 12 is frequency-boosted. At this time, the air source heat pump 11 is in heating mode, and the plate heat exchanger 22 and the air source heat pump 11 simultaneously supply heat to the leaf storage room 1 and the wire storage room 8 until the first temperature T1 is equal to the first target temperature t1. like Figure 7 As shown, when the first temperature T1 is less than the first target temperature t1 and the third temperature T3 is less than the target heating temperature t, the fourth heating mode is turned off, the sixth heating mode is turned on, and the second water pump 12 is frequency-boosted. At this time, the air source heat pump 11 is in heating mode. The hot water return water is heated by the plate heat exchanger 22 and then enters the air source heat pump 11 for heating until the first temperature T1 is equal to the first target temperature t1.

[0074] Embodiment 3 of the present invention provides a storage medium, the storage medium including a stored program, wherein the program controls the device where the storage medium is located to execute the above-described control method when it is running.

[0075] Storage media can be any available media that can be accessed by a computing device. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other storage medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computing device. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, or twisted pair, then the coaxial cable, fiber optic cable, or twisted pair are included in the definition of medium. Disk and disc, as used herein, includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), and Blu-Ray® disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0076] In other embodiments, the computing device 100 can act as a server, client, or both, depending on the context. In these and other embodiments, the computing device 100 can also include one or more mass storage devices 120, one or more user input devices 130, and one or more user output devices 140. Such mass storage device 120, user input device 130, and user output device 140 can be connected to the processing unit 110 via the bus 150. The mass storage device 120 can include a computer-readable medium 125. The computer-readable medium 125 can include a computer software product 126. The computer software product 126 can include program code 127. The program code 127 can include instructions executable by the processing unit 110. The computer software product 126 can be divided into one or more separate products, which can be distributed over a network for use by one or more computer systems. Each computer software product 126 can include program code 127.

[0077] Computer readable program instructions for carrying out operations of the present disclosure can be assembly instructions, instruction-set-architecture (ISA) instructions, machine instructions, machine dependent instructions, microcode, firmware instructions, state-setting data, or either source code or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C++ or the like, and conventional procedural programming languages such as the "C" programming language or similar programming languages. The computer readable program instructions can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider). In some embodiments, electronic circuitry including, for example, programmable logic circuitry, field-programmable gate array (FPGA), or programmable logic array (PLA) can execute the computer readable program instructions by utilizing state information of the computer readable program instructions to personalize the electronic circuitry, in order to perform aspects of the present disclosure.

[0078] Finally, it should be noted that the above-mentioned embodiments are merely used to illustrate the technical solutions of the present application, rather than limiting the present application, and although the present application has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and any modification or equivalent replacement without departing from the spirit and scope of the present application should be covered in the protection scope of the claims of the present application.

Claims

1. A waste heat recovery system coupled with heating and cooling demand, characterized in that, include: First heating circuit, second heating circuit, third heating circuit, fourth heating circuit, fifth heating circuit, sixth heating circuit, first cooling circuit and second cooling circuit; The first heating circuit includes a heating outlet pipe of a water source heat pump, a leaf storage chamber, and a heating inlet pipe of a water source heat pump connected in sequence. The second heating circuit includes the heating outlet pipe of the water source heat pump, the storage chamber, the heat absorption end of the heat exchanger, the air source heat pump and the heating inlet pipe of the water source heat pump connected in sequence. The third heating circuit includes the heating outlet pipe of the water source heat pump, the storage chamber, the heat absorption end of the heat exchanger, and the heating inlet pipe of the water source heat pump, which are connected in sequence. The fourth heating circuit includes a water outlet pipe at the heat absorption end of the heat exchanger, a heating branch, and a water inlet pipe at the heat absorption end of the heat exchanger, which are connected in sequence. The heating branch includes a hot water inlet, and the hot water input at the hot water inlet flows out and merges through the leaf storage room and the wire storage room respectively; The fifth heating circuit includes the fourth heating circuit, and the outlet pipe of the air source heat pump, the heating branch, and the inlet pipe of the air source heat pump connected in sequence. The sixth heating circuit includes the outlet pipe of the air source heat pump, the heating branch, the heat absorption end of the heat exchanger, and the inlet pipe of the air source heat pump connected in sequence. The first cooling circuit includes a cooling water outlet pipe of the water source heat pump, a leaf storage chamber and a cooling water inlet pipe of the water source heat pump connected in sequence. The second cooling circuit includes the cooling water outlet pipe of the water source heat pump, the leaf storage chamber, the air source heat pump and the cooling water inlet pipe of the water source heat pump connected in sequence; The water outlet pipe of the leaf storage room is equipped with a first temperature sensor to obtain a first temperature; The heat exchanger's heat-absorbing end outlet pipe is equipped with a third temperature sensor to obtain a third temperature. The heat recovery system coupled with heating and cooling demand is also equipped with a controller, which controls the opening and closing of the heating circuit and the cooling circuit according to the first temperature and the third temperature.

2. The cold and heat demand coupled waste heat recovery system according to claim 1, characterized in that: The cooling water outlet pipe of the water source heat pump is equipped with a second temperature sensor to obtain a second temperature.

3. The cold and heat demand coupled waste heat recovery system according to claim 1, characterized in that: The water source heat pump is equipped with a third water pump in its heating inlet pipe; The water source heat pump is equipped with a first water pump in its cooling water inlet pipe; The air source heat pump is equipped with a second water pump in its inlet pipe.

4. The cold and heat demand coupled waste heat recovery system according to claim 1, characterized in that: The water outlet pipe of the heat exchanger of the second heating circuit is connected to the water inlet pipe of the air source heat pump in sequence through the eleventh electric regulating valve and the sixth electric regulating valve. The water outlet pipe of the air source heat pump is connected to the heating water inlet pipe of the water source heat pump in sequence through the eighth electric regulating valve and the fifteenth electric regulating valve. The outlet pipe of the heat exchanger of the third heating circuit is connected to the heating inlet pipe of the water source heat pump in sequence through the tenth electric regulating valve and the fifteenth electric regulating valve. One hot water input of the heating branch is connected to the inlet pipe of the leaf storage room, and the other is connected to the inlet pipe of the wire storage room through the first electric regulating valve. The outlet pipe of the wire storage room is connected to the outlet pipe of the leaf storage room through the third electric regulating valve. The heat absorption end of the heat exchanger in the fourth heating circuit is connected to the hot water input end of the heating branch through the tenth electric regulating valve. The hot water flowing out of the outlet pipe of the leaf storage chamber of the fifth heating circuit enters the heat absorption end of the heat exchanger in one direction, and enters the air source heat pump in sequence through the ninth electric regulating valve and the sixth electric regulating valve in another direction. The hot water flowing out of the outlet pipe of the air source heat pump through the eighth electric regulating valve and the outlet pipe of the heat exchanger through the tenth electric regulating valve flows into the hot water input end of the heating branch. The outlet pipe of the heat exchanger of the sixth heating circuit is connected to the inlet pipe of the air source heat pump in sequence through the eleventh electric regulating valve and the sixth electric regulating valve. The outlet pipe of the air source heat pump is connected to the hot water input end of the heating branch in sequence through the eighth electric regulating valve and the fifteenth electric regulating valve. The controller controls the opening and closing of the heating circuit by controlling the opening and closing of the electric regulating valve.

5. The cold and heat demand coupled waste heat recovery system according to claim 1, characterized in that: The cooling water outlet pipe of the water source heat pump in the first cooling circuit is connected to the inlet pipe of the wire storage chamber through the second electric regulating valve. The outlet pipe of the wire storage chamber is connected to the inlet pipe of the air source heat pump through the fourth electric regulating valve and the fifth electric regulating valve in sequence. The outlet pipe of the air source heat pump is connected to the cooling water inlet pipe of the water source heat pump through the sixteenth electric regulating valve. The cooling water outlet pipe of the water source heat pump in the second cooling circuit is connected to the inlet pipe of the wire storage room through the second electric regulating valve, and the outlet pipe of the wire storage room is connected to the cooling water inlet pipe of the water source heat pump through the fourth electric regulating valve. The controller controls the opening and closing of the cooling circuit by controlling the opening and closing of the electric regulating valve.

6. The cold and heat demand coupled waste heat recovery system according to claim 1, characterized in that: The cold and heat demand coupled waste heat recovery system also includes a scrubbing tower. The circulation outlet of the scrubbing tower's sewage pipe is connected to the circulation inlet of the sewage pipe in sequence through the twelfth electric regulating valve, the fourth water pump, the heat source end of the heat exchanger, and the thirteenth electric regulating valve, so as to realize the use of sewage to heat the hot water at the heat absorption end of the heat exchanger. A fourteenth electric regulating valve is also provided between the circulation outlet and circulation inlet of the sewage pipe; When it is necessary to heat the hot water at the heat absorption end of the heat exchanger, the controller controls the twelfth and thirteenth electric regulating valves to open and the fourteenth electric regulating valve to close; conversely, the controller controls the twelfth and thirteenth electric regulating valves to close and the fourteenth electric regulating valve to open, so as to realize the functions of sewage discharge and heating.

7. A control method for a cold and heat demand coupled waste heat recovery system as described in any one of claims 1-6, characterized in that, Includes the following steps: Obtain the current operating mode, as well as the first and third temperatures; The heating and cooling circuits are controlled to open and close based on the current operating mode, the first temperature, and the third temperature.

8. The control method according to claim 7, characterized in that: If the current operating mode is summer mode, the first heating circuit and the second cooling circuit are turned on, and the second temperature is obtained through the second temperature sensor located in the cooling water outlet pipe of the water source heat pump. When the first temperature is greater than the first target temperature, the frequency of the third water pump at the heating inlet pipe of the water source heat pump, the first water pump at the cooling inlet pipe of the water source heat pump and the frequency of the second water pump at the cooling inlet pipe of the water source heat pump are reduced until the first temperature is equal to the first target temperature. At the same time, the second cooling circuit is closed, the first cooling circuit is opened and the frequency of the second water pump at the inlet pipe of the air source heat pump is increased to maintain the second temperature equal to the second target temperature. When the first temperature is lower than the first target temperature and the third temperature is lower than the target heating temperature, the frequency of the third water pump, the water source heat pump and the first water pump are maintained to keep the second temperature equal to the second target temperature. At the same time, the first heating circuit is closed, the second heating circuit is opened and the frequency of the second water pump is increased until the first temperature equals the first target temperature. When the first temperature is lower than the first target temperature and the third temperature is greater than or equal to the target heating temperature, the first heating circuit is closed and the third heating circuit is opened until the first temperature equals the first target temperature; if at this time, the first temperature is lower than the first target temperature for a continuous first preset time, the third heating circuit is closed and the second heating circuit is opened until the first temperature equals the first target temperature.

9. The control method according to claim 7, characterized in that: If the current operating mode is winter mode, then the fourth heating circuit will be activated; When the first temperature is less than the first target temperature and the third temperature is greater than or equal to the target heating temperature, the fourth heating mode is turned off, the fifth heating mode is turned on, and the frequency of the second water pump at the water inlet pipe of the air source heat pump is increased until the first temperature equals the first target temperature. When the first temperature is lower than the first target temperature and the third temperature is lower than the target heating temperature, the fourth heating mode is turned off, the sixth heating mode is turned on, and the frequency of the second water pump is increased until the first temperature equals the first target temperature.

10. A storage medium, characterized in that: The storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the storage medium to perform the control method according to any one of claims 7-9.

Images