CN212299548U - Bathing wastewater waste heat recovery system - Google Patents
Bathing wastewater waste heat recovery system Download PDFInfo
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- CN212299548U CN212299548U CN202022026591.3U CN202022026591U CN212299548U CN 212299548 U CN212299548 U CN 212299548U CN 202022026591 U CN202022026591 U CN 202022026591U CN 212299548 U CN212299548 U CN 212299548U
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Abstract
The utility model discloses a bathing waste water waste heat recovery system belongs to bathing waste water waste heat recovery and utilizes technical field, for solving the high and high scheduling problem design of prior art investment, use cost height and fault rate. The utility model discloses bathing waste water waste heat recovery system includes that bathing waste water handles and supplies subsystem, bathing waste water heat transfer subsystem, bathing water prepare subsystem, bathing water storage and supply subsystem and running water and low temperature circulating water moisturizing subsystem. The waste heat recovery system for the bathing wastewater can ensure that the bathing wastewater and the low-temperature circulating water inside and outside the coil pipe can exchange heat more fully, thereby improving the heat exchange efficiency; the evaporator and the condenser of the heat pump are made of copper, so that the equipment investment is saved by 25-30%; the problems of corrosion and blockage are avoided, the service life is longer, and the operation and maintenance cost can be saved; the problem of unit output and energy efficiency attenuation caused by dirt attached to the wall surface of the evaporator of the heat pump is effectively solved.
Description
Technical Field
The utility model relates to a bathing waste water waste heat recovery utilizes technical field, especially relates to a bathing waste water waste heat recovery system.
Background
The temperature of bath water (including but not limited to shower water and bath water) is generally between 40 ℃ and 45 ℃, the drainage temperature is between 30 ℃ and 37 ℃, namely only about 20 percent of energy is generally utilized in the using process, and the rest 80 percent of heat is discharged into a sewage pipe network in the form of waste water, so that a large amount of energy is wasted.
In order to recover energy (waste heat) in the bath wastewater, in the prior art, a plate heat exchanger is connected in series with a sewage source heat pump, the bath wastewater is filtered and purified, then is firstly introduced into the plate heat exchanger to preheat tap water, the bath wastewater after being cooled is used as a low-temperature heat source, the preheated tap water is continuously heated by the sewage source heat pump, and the tap water is finally heated to more than 40 ℃ for bathing.
The technology mainly has the following three problems: the first and initial investment are high, on one hand, the material of the sewage source heat pump evaporator is made of nickel-copper alloy with high manufacturing cost and good corrosion resistance, and on the other hand, an automatic back washing device is additionally arranged on the sewage source heat pump. Secondly, the operation and maintenance cost is high, on one hand, as the use time is increased, the dirt is continuously attached to the plates of the heat exchanger and the inner pipe wall of the evaporator, the heat exchange area is continuously reduced, the output power and the energy efficiency of the equipment are continuously reduced (the energy efficiency of the equipment is reduced by 5% when the dirt is increased by 1 mm), and the power consumption of the water source heat pump is continuously increased; on the other hand, the plate heat exchanger and the sewage source heat pump are easy to block and need to be cleaned for many times every year. Thirdly, equipment has frequent failure and short service life, dirt in the evaporator is accumulated to a certain degree, and the sewage source heat pump unit reports that the failure cannot be operated; the continuously accumulated dirt in the heat exchanger and the evaporator continuously increases the load of the compressor, so that the compressor is easy to burn; dirt is attached to the plate and the pipe wall to form spot corrosion, and the compressor water inlet can be directly scrapped due to the internal leakage of the evaporator.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a bathing waste water waste heat recovery system that the investment is low, need not frequent maintenance and maintenance.
To achieve the purpose, the utility model adopts the following technical proposal:
a bathing waste water waste heat recovery system comprises: a bathing wastewater treatment and supply subsystem for purifying bathing wastewater; the bathing wastewater heat exchange subsystem is used for receiving the bathing wastewater purified by the bathing wastewater treatment and supply subsystem and exchanging heat between the bathing wastewater and low-temperature circulating water, wherein the low-temperature circulating water is softened water or reverse osmosis water; the bathing wastewater heat exchange subsystem comprises a coil pipe for circulating the low-temperature circulating water, the coil pipe is spirally and vertically arranged in a bathing wastewater tank for bearing the bathing wastewater, and the coil pipe can float and stretch in a set range in the bathing wastewater tank; the bath water preparation subsystem is used for circularly conveying the low-temperature circulating water to the coil pipe to extract heat for heating tap water, and after the tap water is heated to a set temperature to form bath water, the bath water preparation subsystem discharges the bath water; the bath water preparation subsystem comprises a heat pump, and an evaporator and a condenser of the heat pump are made of copper; the bath water storage and supply subsystem is used for receiving the bath water discharged from the bath water preparation subsystem and providing the bath water according to the requirements of users; and the tap water and low-temperature circulating water replenishing subsystem is used for conveying softened water or reverse osmosis water to the bath water preparation subsystem and conveying tap water to the bath water storage and supply subsystem.
Particularly, the bathing wastewater heat exchange subsystem further comprises a low-temperature circulating water primary water separator connected to the water outlet end of the bathing water preparation subsystem, a plurality of low-temperature circulating water secondary water separators connected between the low-temperature circulating water primary water separator and the water inlet end of the coil, a low-temperature circulating water primary water collector connected to the water inlet end of the bathing water preparation subsystem, and a plurality of low-temperature circulating water secondary water collectors connected between the low-temperature circulating water primary water collector and the water outlet end of the coil, wherein low-temperature circulating water butterfly valves are respectively arranged at the water inlet end of the low-temperature circulating water primary water separator and the water outlet end of the low-temperature circulating water primary water collector.
Particularly, the bathing wastewater heat exchange subsystem further comprises a lower support for fixing the low-temperature circulating water secondary water separator, an upper support for fixing the low-temperature circulating water secondary water separator, a bathing wastewater tank overflow pipe for guiding liquid in the bathing wastewater tank to the outside of the tank, and a bathing wastewater tank manhole arranged at the top of the bathing wastewater tank.
Particularly, the bathing wastewater heat exchange subsystem further comprises a bathing wastewater thermocouple for measuring the temperature of the bathing wastewater in the bathing wastewater tank, a reed switch for measuring whether the water level of the bathing wastewater in the bathing wastewater tank reaches a lower limit, a bathing wastewater tank magnetic float level gauge for measuring the height of the water level of the bathing wastewater in the bathing wastewater tank, a bathing wastewater drainage pipe for draining the bathing wastewater out of the bathing wastewater tank, and a bathing wastewater drainage electromagnetic valve and a bathing wastewater drainage butterfly valve which are sequentially arranged on the bathing wastewater drainage pipe respectively.
Particularly, the bathing wastewater thermocouple and the reed switch are respectively and electrically connected to the bathing wastewater drainage electromagnetic valve.
Particularly, the bath water preparation subsystem comprises an evaporator and a condenser which form the heat pump; a low-temperature circulating water return pipeline and a low-temperature circulating water supply pipeline are respectively connected between the evaporator and the bathing wastewater tank, the low-temperature circulating water return pipeline is connected to the low-temperature circulating water primary water collector, and the low-temperature circulating water supply pipeline is connected to the low-temperature circulating water primary water separator; a low-temperature circulating water butterfly valve, a low-temperature circulating water filter, an evaporator soft joint and a low-temperature circulating water thermometer are sequentially arranged on the low-temperature circulating water return pipeline along the water flow direction; a low-temperature circulating water thermometer, an evaporator soft joint, two low-temperature circulating water butterfly valves, a low-temperature circulating water filter, a low-temperature circulating water pump soft joint, a low-temperature circulating water pump, a low-temperature circulating water check valve and a low-temperature circulating water butterfly valve are sequentially arranged on the low-temperature circulating water supply pipeline along the water flow direction; two ends of the low-temperature circulating water pump are respectively provided with a low-temperature circulating water pressure gauge; a bathing circulating water supply pipeline and a bathing circulating water return pipeline are arranged between the condenser and the bathing water storage and supply subsystem, a bathing circulating water thermometer, a condenser soft joint, a bathing water circulating water butterfly valve, a bathing circulating water filter, a bathing circulating water pump soft joint, a bathing circulating water pump soft joint, a bathing circulating water check valve and a bathing water circulating water butterfly valve are sequentially arranged on the bathing circulating water supply pipeline along the water flow direction, and bathing circulating water pressure meters are respectively arranged at two ends of the bathing circulating water pump; a bath circulating water butterfly valve, a bath circulating water filter, a condenser soft joint and a bath circulating water thermometer are sequentially arranged on the bath circulating water return pipeline along the water flow direction.
Particularly, the bathing water storage and supply subsystem comprises a bathing water tank, the bathing water tank is respectively connected with the bathing circulating water supply pipeline, the bathing circulating water return pipeline and a bathing water supply pipeline for supplying water to users, and a bathing water supply butterfly valve, a bathing water supply filter, a bathing water supply pump soft joint, a bathing water supply pressure gauge, a bathing water supply pump soft joint, a bathing water supply check valve and a bathing water supply butterfly valve are sequentially arranged on the bathing water supply pipeline along the water flow direction.
Particularly, the bath water tank is provided with a bath water thermocouple for detecting the temperature of tap water in the bath water tank, a bath water tank overflow pipe and a bath water tank manhole for communicating the inside and the outside of the bath water tank, a bath water tank magnetic float level meter for measuring the height of the tap water level in the bath water tank and a bath water drainage pipe for emergency drainage and pollution discharge of the bath water tank, and the bath water drainage pipe is provided with a bath water drainage butterfly valve; the bath water thermocouple is in signal connection with the bath water supply pump.
Particularly, the tap water and low-temperature circulating water replenishing subsystem comprises a tap water pipeline, and a tap water butterfly valve, a tap water filter, a tap water pump soft joint, a tap water pressure gauge, a tap water pump soft joint, a tap water check valve and a tap water butterfly valve are sequentially arranged on the tap water pipeline along the water flow direction; the tail end of the tap water pipeline is respectively connected with a bathing water replenishing pipeline and a low-temperature circulating water replenishing pipeline, the bathing water replenishing pipeline is connected to the bathing water storage and supply subsystem, and the low-temperature circulating water replenishing pipeline is connected to the bathing water preparation subsystem; a tap water butterfly valve, a tap water electromagnetic valve and a tap water ball float valve are sequentially arranged on the bath water replenishing pipeline along the water flow direction; the low-temperature circulating water replenishing pipeline is sequentially provided with a tap water butterfly valve, a softened water or reverse osmosis water device, a softened water or reverse osmosis water inlet butterfly valve, a softened water or reverse osmosis water tank, a softened water or reverse osmosis water outlet butterfly valve, a constant-pressure water replenishing device, a water replenishing butterfly valve and a water replenishing pipeline along the water flow direction; and a ball float valve, an overflow pipe and a manhole are arranged on the softened water or reverse osmosis water tank.
Particularly, the bathing wastewater treatment and supply subsystem comprises a bathing wastewater supply pipeline for conveying the bathing wastewater, a hair filter, a sand cylinder filter, a bathing wastewater pump, a bathing wastewater check valve and a bathing wastewater ball float valve are sequentially arranged on the bathing wastewater supply pipeline along the water flow direction, and the bathing wastewater ball float valve is positioned in the bathing wastewater tank; bath wastewater supply butterfly valves are respectively arranged between a water inlet of the bath wastewater supply pipeline and the hair filter, between the hair filter and the sand cylinder filter, between the sand cylinder filter and the bath wastewater pump, and between the bath wastewater check valve and the bath wastewater float valve; and bath wastewater pressure gauges are respectively arranged at two ends of the bath wastewater pump, and bath wastewater pump soft joints are respectively arranged between the sand jar filter and the bath wastewater pump and between the bath wastewater pump and the bath wastewater check valve.
The coil pipe of the bathing wastewater heat exchange subsystem of the bathing wastewater waste heat recovery system is spiral and is vertically arranged in the bathing wastewater tank for bearing the bathing wastewater, and the coil pipe can float and stretch in the bathing wastewater tank within a set range, so that the bathing wastewater inside and outside the coil pipe and low-temperature circulating water can exchange heat more fully, and the heat exchange efficiency is improved; in addition, because the expansion coefficients of the dirt and the stainless steel for manufacturing the coil pipe are different, the expansion of the coil pipe can lead the dirt formed on the outer surface of the coil pipe to automatically fall off, thereby effectively avoiding the accumulation of the dirt and reducing the times of maintenance. The heat exchanger of the heat pump of the bath water preparation subsystem is made of copper, replaces the heat exchanger made of nickel-copper alloy with better corrosion resistance in the existing sewage source heat pump, and saves 25-30% of equipment investment; the problems of corrosion and blockage are avoided, the service life is longer, and the operation and maintenance cost can be saved; the problem of machine set output and energy efficiency attenuation caused by dirt attached to the wall surface of the evaporator is effectively solved. The method has wide application range, is suitable for large bathrooms with large bath wastewater flow and stable temperature, and has remarkable economic benefit, energy-saving benefit and emission reduction benefit when the waste heat in the bath wastewater is recovered.
Drawings
FIG. 1 is a schematic structural view of a waste heat recovery system for bath wastewater provided by an embodiment of the present invention;
FIG. 2 is a schematic structural view of a bathing wastewater heat exchange subsystem provided in an embodiment of the present invention;
FIG. 3 is a schematic structural view of a bath water preparation subsystem according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a bath water storage and supply subsystem according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a water replenishing subsystem for tap water and low-temperature circulating water according to an embodiment of the present invention;
fig. 6 is a schematic structural view of a bathing wastewater treatment and supply subsystem according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
The embodiment discloses a bathing wastewater waste heat recovery system. As shown in fig. 1 to 6, the bathing wastewater waste heat recovery system comprises a bathing wastewater treatment and supply subsystem 1, a bathing wastewater heat exchange subsystem 2, a bathing water preparation subsystem 3, a bathing water storage and supply subsystem 4 and a tap water and low-temperature circulating water replenishing subsystem 5.
Wherein, the bathing wastewater treatment and supply subsystem 1 is used for purifying the bathing wastewater; the bathing wastewater heat exchange subsystem 2 is used for receiving the bathing wastewater purified by the bathing wastewater treatment and supply subsystem 1, and then carrying out heat exchange between the bathing wastewater and low-temperature circulating water, wherein the low-temperature circulating water is softened water or reverse osmosis water in order to avoid deposition of scale and the like in a conveying pipeline; the bath water preparation subsystem 3 is used for circularly conveying low-temperature circulating water into the coil pipe 21 to extract heat for heating tap water, and after the tap water is heated to a set temperature to form bath water, the bath water preparation subsystem 3 discharges the bath water; the bath water storage and supply subsystem 4 is used for receiving the bath water discharged from the bath water preparation subsystem 3 and providing the bath water according to the requirements of users; the tap water and low-temperature circulating water replenishing subsystem 5 is used for conveying softened water or reverse osmosis water to the bath water preparation subsystem 3 and conveying tap water to the bath water storage and supply subsystem 4, wherein the softened water or reverse osmosis water is obtained by treating the tap water through the tap water and low-temperature circulating water replenishing subsystem 5.
The bathing wastewater heat exchange subsystem 2 comprises a coil pipe 21 for circulating low-temperature circulating water, the coil pipe 21 is spirally and vertically arranged in a bathing wastewater tank 22 for containing bathing wastewater, and the coil pipe 21 can float (due to the fluctuation of the bathing wastewater) and stretch (due to the change of the temperature of media inside and outside the coil pipe 21) within a set range in the bathing wastewater tank 22. The coil pipe 21 floats and/or stretches, so that the heat exchange between the bathing wastewater inside and outside the pipe and the low-temperature circulating water is more sufficient, and the heat exchange efficiency is improved; in addition, because the expansion coefficient of the dirt is different from that of the stainless steel of which the coil pipe 21 is made, the expansion of the coil pipe 21 can lead the dirt formed on the outer surface of the coil pipe to automatically fall off, and the accumulation of the dirt is effectively avoided.
The specific number of the coil pipes 21 is not particularly limited in this embodiment, and may be set according to the volume of the bath waste water tank 22 (for example, 70 m)3The volume of the coil 21 in the bathing waste water tank 22 is about 20m3) All the coil pipes 21 are uniformly distributed in the bathing wastewater tank 22 to ensure uniform heat exchange; the coil 21 is preferably made of DN32 stainless steel pipe, the raw material price is appropriate and the heat transfer efficiency is high; the coil 21 is preferably circular and spiral in shape, and can effectively increase the heat exchange area in unit volume to be not less than 2.6m2/m3And the bent spiral channel is beneficial to enhancing the turbulent state of the fluid, reducing the resistance of the fluid in the channel and improving the heat exchange efficiency. The effective volume rate in the bathing wastewater tank 22 is not less than 70 percent, the volume utilization rate is high, and no dead water area exists.
The bath water preparation subsystem 3 comprises a heat pump 31 used as a water source heat pump, and an evaporator and a condenser of the heat pump 31 are made of copper, so that a heat exchanger made of nickel-copper alloy with better corrosion resistance in the existing sewage source heat pump is replaced, and the equipment investment is saved by 25-30%; the problems of corrosion and blockage are avoided, the service life is longer, and the operation and maintenance cost can be saved; the problems of unit output and energy efficiency attenuation caused by dirt attached to the wall surface of the evaporator 311 are effectively solved.
The bathing wastewater waste heat recovery system can fully recycle the heat in the bathing wastewater to heat the bathing water, reduces the consumption of electric energy, does not need to consume primary energy such as natural gas, coal and the like, does not directly discharge pollutants, and has obvious energy-saving and environment-friendly advantages; compared with the prior sewage source heat pump utilization technology, the bath water preparation subsystem 3 is provided with the water source heat pump, the initial investment is saved by 25-30%, the later operation and maintenance does not need frequent maintenance, the problems of output of equipment and energy efficiency attenuation do not exist, and the operating cost is saved by more than 60%.
As shown in fig. 2, the bathing wastewater heat exchange subsystem 2 comprises a low-temperature circulating water primary water separator 23 connected to the water outlet end of the bathing water preparation subsystem 3, a plurality of low-temperature circulating water secondary water separators 24 connected between the low-temperature circulating water primary water separator 23 and the water inlet end of the coil 21, a low-temperature circulating water primary water collector 25 connected to the water inlet end of the bathing water preparation subsystem 3, and a plurality of low-temperature circulating water secondary water collectors 26 connected between the low-temperature circulating water primary water collector 25 and the water outlet end of the coil 21, wherein low-temperature circulating water butterfly valves 27 are respectively arranged at the water inlet end of the low-temperature circulating water primary water separator 23 and the water outlet end of the low.
The low-temperature circulating water flowing out of the evaporator 311 passes through the low-temperature circulating water primary water separator 23, the low-temperature circulating water secondary water separator 24, the coil 21, the low-temperature circulating water secondary water collector 26 and the low-temperature circulating water primary water collector 25 in sequence and then returns to the evaporator 311. Preferably, the low-temperature circulating water secondary water separator 24, the low-temperature circulating water secondary water collector 26 and the coil 21 are all connected by stainless steel flexible connection. The low-temperature circulating water primary water separator 23 and the low-temperature circulating water secondary water separator 24 are beneficial to uniform distribution of low-temperature circulating water, the low-temperature circulating water flow entering each coil pipe 21 is guaranteed to be approximately equal, bathing wastewater is enabled to uniformly heat the low-temperature circulating water in the coil pipes 21, and the uniformity of the temperature of the low-temperature circulating water is guaranteed.
On the basis of the structure, the bathing wastewater heat exchange subsystem 2 further comprises a lower bracket 241 for fixing the low-temperature circulating water secondary water separator 24, an upper bracket 261 for fixing the low-temperature circulating water secondary water collector 26, a bathing wastewater tank overflow pipe 28 for guiding liquid in the bathing wastewater tank 22 to the outside of the tank, and a bathing wastewater tank manhole 29 arranged at the top of the bathing wastewater tank 22. An overflow pipe 28 of the bath waste water tank is used for preventing the bath waste water tank 22 from overflowing, and a manhole 29 of the bath waste water tank can be conveniently installed and maintained.
On the basis of the structure, the bathing wastewater heat exchange subsystem 2 further comprises a bathing wastewater thermocouple 201 for measuring the temperature of the bathing wastewater in the bathing wastewater tank 22, a reed switch 202 for measuring whether the water level of the bathing wastewater in the bathing wastewater tank 22 reaches a lower limit, a bathing wastewater tank magnetic float level gauge 206 for measuring the height of the water level of the bathing wastewater in the bathing wastewater tank 22, a bathing wastewater drainage pipeline 203 for discharging the bathing wastewater out of the bathing wastewater tank 22, and a bathing wastewater drainage electromagnetic valve 204 and a bathing wastewater drainage butterfly valve 205 which are sequentially arranged on the bathing wastewater drainage pipeline 203. Wherein, the bath wastewater thermocouple 201 and the reed switch 202 are respectively and electrically connected to the bath wastewater discharge electromagnetic valve 204, so as to realize the automatic discharge of the bath wastewater in the bath wastewater tank 22.
When the system is in operation, the bathing wastewater drainage butterfly valve 205 is set to be in an open state. When the bath wastewater thermocouple 201 detects that the temperature of bath wastewater in the bath wastewater tank 22 reaches a lower limit value (generally set to 10 ℃), the bath wastewater drainage electromagnetic valve 204 is automatically opened to start drainage, and the fallen dirt is discharged along with the drainage. When the reed switch 202 detects that the bath wastewater level in the bath wastewater tank 22 reaches the lower limit value (namely, the bath wastewater is drained), the bath wastewater drainage electromagnetic valve 204 is automatically closed.
As shown in fig. 3, the bath water preparation subsystem 3 includes an evaporator 311 and a condenser 312 which constitute the heat pump 31, the low-temperature circulating water conveyed in the evaporator 311 is softened water or reverse osmosis water, and the low-temperature circulating water circularly flows between the evaporator 311 and the bath wastewater heat exchange subsystem 2; the bathing circulation water delivered in the condenser 312 is tap water, and the bathing circulation water circulates between the condenser 312 and the bathing water storage and supply subsystem 4.
Wherein, a low-temperature circulating water return pipeline 32 and a low-temperature circulating water supply pipeline 33 are respectively connected between the evaporator 311 and the bathing wastewater tank 22, the low-temperature circulating water return pipeline 32 is connected to the low-temperature circulating water primary water collector 25, and the low-temperature circulating water supply pipeline 33 is connected to the low-temperature circulating water primary water separator 23; a low-temperature circulating water butterfly valve 27, a low-temperature circulating water filter 34, an evaporator soft joint 35 and a low-temperature circulating water thermometer 36 are sequentially arranged on the low-temperature circulating water return pipeline 32 along the water flow direction; a low-temperature circulating water thermometer 36, an evaporator soft joint 35, two low-temperature circulating water butterfly valves 27, a low-temperature circulating water filter 34, a low-temperature circulating water pump soft joint 37, a low-temperature circulating water pump 38, a low-temperature circulating water check valve 39 and a low-temperature circulating water butterfly valve 27 are sequentially arranged on the low-temperature circulating water supply pipeline 33 along the water flow direction; a low-temperature circulating water pressure gauge 381 is provided at each end of the low-temperature circulating water pump 38.
The outlet water of the evaporator 311 is provided with low-temperature protection (the temperature can be set to 10 ℃), and when the supply water temperature of the low-temperature circulating water is higher than the protection temperature, the heat pump 31 works normally; when the temperature of the low-temperature circulating water supply water is reduced to be lower than the protection temperature, the heat pump 31 is in standby protection.
A bathing circulating water supply pipeline 313 and a bathing circulating water return pipeline 314 are arranged between the condenser 312 and the bathing water storage and supply subsystem 4, a bathing circulating water thermometer 315, a condenser soft joint 316, a bathing water circulating water butterfly valve 317, a bathing circulating water filter 318, a bathing circulating water pump soft joint 319, a bathing circulating water pump 320, a bathing circulating water pump soft joint 319, a bathing circulating water check valve 321 and a bathing water circulating water butterfly valve 317 are sequentially arranged on the bathing circulating water supply pipeline 313 along the water flow direction, and both ends of the bathing circulating water pump 320 are respectively provided with a bathing circulating water pressure gauge 322; a bath circulating water butterfly valve 317, a bath circulating water filter 318, a condenser soft joint 316 and a bath circulating water thermometer 315 are sequentially arranged on the bath circulating water return pipeline 314 along the water flow direction.
The upper limit of the return water temperature of the condenser 312 is set (the temperature can be set to 45 ℃), and when the return water temperature of the circulating bath water is below the upper limit, the heat pump 31 works normally; when the temperature of the circulating bath water backwater rises to the upper limit value, the heat pump 31 is in standby protection.
When the system is in operation, the low-temperature circulating water in the coil pipe 21 is heated by the bathing wastewater in the bathing wastewater tank 22, then is collected by the low-temperature circulating water secondary water collector 26 and the low-temperature circulating water primary water collector 25 in sequence, flows into the low-temperature circulating water return pipe 32, is filtered by the low-temperature circulating water filter 34, enters the evaporator 311, transfers heat to the refrigerant, flows out, is pressurized by the low-temperature circulating water pump 38, then is distributed by the low-temperature circulating water primary water separator 23 and the low-temperature circulating water secondary water separator 24 in sequence, enters the coil pipe 21 to be reheated, and is circulated in a reciprocating manner until the temperature of the bathing wastewater in the bathing wastewater tank 22 reaches a lower limit value, at the moment, the water supply temperature of the low-temperature.
Tap water in the bathing water tank 41 flows into a bathing circulating water return pipe 314, is filtered by a bathing circulating water filter 318, enters a condenser 312, absorbs heat emitted by a refrigerant, flows out, is pressurized by a bathing circulating water pump 320, and is sent into the bathing water tank 41, and the circulation is repeated in such a way until the temperature of the bathing circulating water return water rises to the upper limit value, and the heat pump 31 enters a standby protection state.
As shown in fig. 4, the bathing water storage and supply subsystem 4 comprises a bathing water tank 41, the bathing water tank 41 is respectively connected with a bathing circulating water supply pipeline 313, a bathing circulating water return pipeline 314 and a bathing water supply pipeline 42 for supplying water to users, and a bathing water supply butterfly valve 43, a bathing water supply filter 44, a bathing water supply pump soft joint 45, a bathing water supply pressure gauge 46, a bathing water supply pump 47, a bathing water supply pressure gauge 46, a bathing water supply pump soft joint 45, a bathing water supply check valve 48 and a bathing water supply butterfly valve 43 are sequentially arranged on the bathing water supply pipeline 42 along the water flow direction.
The bath water tank 41 is provided with a bath water thermocouple 411 for detecting the temperature of tap water in the bath water tank 41, a bath water tank overflow pipe 412 and a bath water tank manhole 413 for communicating the inside and the outside of the bath water tank 41, a bath water tank magnetic float level gauge 414 for measuring the height of the tap water level in the bath water tank 41 and a bath water drainage pipeline 415 for emergency drainage and pollution discharge of the bath water tank 41, and the bath water drainage pipeline 415 is provided with a bath water drainage butterfly valve 416. The bath tank overflow pipe 412 is used for preventing the bath tank 41 from overflowing; the bath water tank manhole 413 is arranged at the top of the bath water tank 41, and installation and maintenance are convenient.
The bath water thermocouple 411 is in signal connection with the bath water supply pump 47, so that the bath water supply pump 47 can be automatically started and stopped. When the bath water thermocouple 411 detects that the temperature of tap water in the bath water tank 41 is within a set range (generally above 40 ℃), the bath water supply pump 47 is automatically started; when the bath water thermocouple 411 detects that the temperature of tap water in the bath water tank 41 is below a set value, the bath water supply pump 47 is automatically turned off.
When the system is in operation, the bath water supply butterfly valve 43 is opened and the bath water discharge butterfly valve 416 on the bath water discharge pipe 415 is closed. Tap water at 40-44 ℃ in the bathing water tank 41 is pressurized by a bathing water supply pump 47 through a bathing water supply pipeline 42 and then is conveyed to a shower room for bathing of a user.
As shown in fig. 5, the tap water and low-temperature circulating water replenishing subsystem 5 includes a tap water pipe 51, and a tap water butterfly valve 52, a tap water filter 53, a tap water pump soft joint 54, a tap water pressure gauge 55, a tap water pump 56, a tap water pressure gauge 55, a tap water pump soft joint 54, a tap water check valve 57, and a tap water butterfly valve 52 are sequentially disposed on the tap water pipe 51 along a water flow direction.
The tail end of the tap water pipeline 51 is respectively connected with a bathing water supplementing pipeline 58 and a low-temperature circulating water supplementing pipeline 59, the bathing water supplementing pipeline 58 is connected to the bathing water storage and supply subsystem 4, and the low-temperature circulating water supplementing pipeline 59 is connected to the bathing water preparation subsystem 3.
The bathing water supplementing pipeline 58 is sequentially provided with a tap water butterfly valve 52, a tap water electromagnetic valve 581 and a tap water ball float valve 582 along the water flow direction, and the tap water ball float valve 582 is arranged in the bathing water tank 41. When the water level in the bath water tank 41 is at a low level, the tap water ball float 582 is in an open state; when the water level in the bath tank 41 reaches a set value, the tap water float valve 582 is closed.
The amount of the tap water added to the bath water tank 41 depends on the bath wastewater inlet temperature, the bath wastewater discharge temperature, the bath wastewater amount, the tap water inlet temperature, and the bath water supply temperature. When the bath wastewater inlet temperature is 35 ℃, the bath wastewater discharge temperature is 10 ℃, the tap water inlet temperature is 10 ℃ and the bath water supply temperature is 43 ℃, the tap water adding amount of the bath water tank 41 is the same as the bath wastewater amount of the bath wastewater tank 22.
The low-temperature circulating water supplementing pipeline 59 is sequentially provided with a tap water butterfly valve 52, a softened water or reverse osmosis water device 591, a softened water or reverse osmosis water inlet butterfly valve 592, a softened water or reverse osmosis water tank 593, a softened water or reverse osmosis water outlet butterfly valve 594, a constant-pressure water supplementing device 595, a water supplementing butterfly valve 596 and a water supplementing pipeline 597 along the water flow direction; a ball cock, an overflow pipe and a manhole are arranged on the softened water or reverse osmosis water tank 593. The constant-pressure water replenishing device 595 preferably comprises a pressure stabilizing tank, a water replenishing pump, a water replenishing control system, a pressure relief device and the like.
An overflow pipe for preventing tank overflow is provided on the softened water or reverse osmosis water tank 593, and a manhole for facilitating installation and maintenance is further provided on the top of the softened water or reverse osmosis water tank 593. The top of the softened water or reverse osmosis water tank 593 is also provided with a ball float valve, when the water level in the softened water or reverse osmosis water tank 593 is at a low level, the ball float valve is opened, the softened water or reverse osmosis water device 591 is also in an open state, softened water or reverse osmosis water is continuously prepared and is conveyed into the softened water or reverse osmosis water tank 593 until the water level reaches a set value, the ball float valve is closed, and the softened water or reverse osmosis water device 591 is also in a standby state.
When the pressure in the low-temperature circulating water supply pipeline 33 before the inlet of the low-temperature circulating water pump 38 is reduced to a set value, the water replenishing pump of the constant-pressure water replenishing device 595 is automatically started to replenish water. When water is replenished, the softened water or the reverse osmosis water in the softened water or the reverse osmosis water tank 593 is sent to the water replenishing pump through the softened water or reverse osmosis water outlet pipe, and flows into the water replenishing pipe 597 after being pressurized, so that the low-temperature circulating water supply pipe 33 is replenished with water. When the pressure in the low-temperature circulating water supply pipeline 33 before the inlet of the low-temperature circulating water pump 38 rises to a set value, the water replenishing pump of the constant-pressure water replenishing device 595 is automatically closed, and water replenishing is stopped.
As shown in fig. 6, the bathing wastewater treatment and supply subsystem 1 comprises a bathing wastewater supply pipeline 11 for conveying bathing wastewater, a hair filter 12, a sand cylinder filter 13, a bathing wastewater pump 14, a bathing wastewater check valve 15 and a bathing wastewater ball float valve 16 are sequentially arranged on the bathing wastewater supply pipeline 11 along the water flow direction, and the bathing wastewater ball float valve 16 is positioned in a bathing wastewater tank 22; bath wastewater supply butterfly valves 17 are respectively arranged between the water inlet of the bath wastewater supply pipeline 11 and the hair filter 12, between the hair filter 12 and the sand cylinder filter 13, between the sand cylinder filter 13 and the bath wastewater pump 14, and between the bath wastewater check valve 15 and the bath wastewater float valve 16; both ends of the bathing waste water pump 14 are respectively provided with a bathing waste water pressure gauge 18, and bathing waste water pump soft joints 19 are respectively arranged between the sand jar filter 13 and the bathing waste water pump 14 and between the bathing waste water pump 14 and the bathing waste water check valve 15.
When the system is in operation, the bath wastewater water supply butterfly valve 17 is set to be in an open state, bath wastewater at the temperature of 30-37 ℃ enters the bath wastewater water supply pipeline 11 and flows into the bath wastewater tank 22 through the hair filter 12, the sand cylinder filter 13, the bath wastewater pump 14 and the bath wastewater check valve 15 in sequence. The hair filter 12 and the sand jar filter 13 are arranged in front of a water suction port of the bathing wastewater pump 14, the hair filter 12 can filter impurities such as hair, fibers and the like in the bathing wastewater, and the sand jar filter 13 can eliminate tiny dirt in the bathing wastewater by using special filtering sand.
The bathing wastewater ball float valve 16 adjusts the water supply amount of the bathing wastewater by controlling the water level in the bathing wastewater tank 22, and when the water level is below a preset height, the bathing wastewater ball float valve 16 is opened; when the water level rises to a preset height, the bathing waste water float valve 16 is closed.
The bathing wastewater pump 14, the low-temperature circulating water pump 38, the bathing circulating water pump 320, the tap water pump 56 and the bathing water supply pump 47 all adopt variable-frequency pipeline pumps, a butterfly valve, a filter, a soft joint and a pressure gauge are sequentially arranged in front of a water inlet of the water pumps, and the pressure gauge, the soft joint, a check valve and the butterfly valve are sequentially arranged behind a water outlet.
The power parts of the bathing wastewater waste heat recovery system are a water source heat pump and a water pump which are mature equipment; the circulating water at the evaporator side of the water source heat pump is softened water or reverse osmosis water, so that the problems of corrosion and blockage do not exist, and the unit is safer and more stable to operate. The automatic water supply system has high automation level, the system operation can realize high automatic control, the bathing waste water tank 22 can realize automatic waste water adding and automatic waste water discharging, the bathing water tank 41 can realize automatic tap water supply and automatic bath water supply, and the water source heat pump can also realize automatic start and stop.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A bathing waste water waste heat recovery system is characterized by comprising:
a bathing wastewater treatment and supply subsystem (1) for purifying bathing wastewater;
the bathing wastewater heat exchange subsystem (2) is used for receiving the bathing wastewater purified by the bathing wastewater treatment and supply subsystem (1) and exchanging heat between the bathing wastewater and low-temperature circulating water, wherein the low-temperature circulating water is softened water or reverse osmosis water; the bathing wastewater heat exchange subsystem (2) comprises a coil pipe (21) for circulating the low-temperature circulating water, the coil pipe (21) is spiral and is vertically arranged in a bathing wastewater tank (22) for bearing the bathing wastewater, and the coil pipe (21) can float and stretch in a set range in the bathing wastewater tank (22);
the bath water preparation subsystem (3) is used for circularly conveying the low-temperature circulating water into the coil pipe (21) to extract heat for heating tap water, and the bath water preparation subsystem (3) discharges the bath water after the tap water is heated to a set temperature to form bath water; the bath water preparation subsystem (3) comprises a heat pump (31), and an evaporator and a condenser of the heat pump (31) are made of copper;
a bath water storage and supply subsystem (4) for receiving the bath water discharged from the bath water preparation subsystem (3) and providing the bath water according to the requirements of users; and the number of the first and second groups,
and the tap water and low-temperature circulating water replenishing subsystem (5) is used for conveying softened water or reverse osmosis water to the bath water preparing subsystem (3) and conveying tap water to the bath water storing and supplying subsystem (4).
2. The bathing wastewater waste heat recovery system according to claim 1, wherein the bathing wastewater heat exchange subsystem (2) further comprises a low-temperature circulating water primary water separator (23) connected to the water outlet end of the bathing water preparation subsystem (3), a plurality of low-temperature circulating water secondary water separators (24) connected between the low-temperature circulating water primary water separator (23) and the water inlet end of the coil (21), a low-temperature circulating water primary water collector (25) connected to the water inlet end of the bathing water preparation subsystem (3), and a plurality of low-temperature circulating water secondary water collectors (26) connected between the low-temperature circulating water primary water collector (25) and the water outlet end of the coil (21), and a low-temperature circulating water butterfly valve (27) is respectively arranged at the water inlet end of the low-temperature circulating water primary water separator (23) and the water outlet end of the low-temperature circulating water primary water collector (25).
3. The bathing wastewater waste heat recovery system of claim 2, wherein the bathing wastewater heat exchange subsystem (2) further comprises a lower bracket (241) for fixing the low-temperature circulating water secondary water separator (24), an upper bracket (261) for fixing the low-temperature circulating water secondary water collector (26), a bathing wastewater tank overflow pipe (28) for draining liquid in the bathing wastewater tank (22) to the outside of the tank, and a bathing wastewater tank manhole (29) opened at the top of the bathing wastewater tank (22).
4. The bathing wastewater waste heat recovery system according to claim 2, wherein the bathing wastewater heat exchange subsystem (2) further comprises a bathing wastewater thermocouple (201) for measuring the temperature of the bathing wastewater in the bathing wastewater tank (22), a reed switch (202) for measuring whether the water level of the bathing wastewater in the bathing wastewater tank (22) reaches a lower limit, a bathing wastewater tank magnetic float level gauge (206) for measuring the water level of the bathing wastewater in the bathing wastewater tank (22), a bathing wastewater drainage pipeline (203) for draining the bathing wastewater out of the bathing wastewater tank (22), and a bathing wastewater drainage solenoid valve (204) and a bathing wastewater drainage butterfly valve (205) which are respectively and sequentially arranged on the bathing wastewater drainage pipeline (203).
5. The bathing wastewater waste heat recovery system of claim 4, wherein the bathing wastewater thermocouple (201) and the reed pipe (202) are electrically connected to the bathing wastewater drain solenoid valve (204), respectively.
6. An bathing waste water heat recovery system according to any one of the claims 2-5, wherein the bathing water preparation subsystem (3) comprises an evaporator (311) and a condenser (312) that constitute the heat pump (31);
a low-temperature circulating water return pipeline (32) and a low-temperature circulating water supply pipeline (33) are respectively connected between the evaporator (311) and the bathing wastewater tank (22), the low-temperature circulating water return pipeline (32) is connected to the low-temperature circulating water primary water collector (25), and the low-temperature circulating water supply pipeline (33) is connected to the low-temperature circulating water primary water separator (23); a low-temperature circulating water butterfly valve (27), a low-temperature circulating water filter (34), an evaporator soft joint (35) and a low-temperature circulating water thermometer (36) are sequentially arranged on the low-temperature circulating water return pipeline (32) along the water flow direction; a low-temperature circulating water thermometer (36), an evaporator soft joint (35), two low-temperature circulating water butterfly valves (27), a low-temperature circulating water filter (34), a low-temperature circulating water pump soft joint (37), a low-temperature circulating water pump (38), a low-temperature circulating water check valve (39) and a low-temperature circulating water butterfly valve (27) are sequentially arranged on the low-temperature circulating water supply pipeline (33) along the water flow direction; two ends of the low-temperature circulating water pump (38) are respectively provided with a low-temperature circulating water pressure gauge (381);
a bathing circulating water supply pipeline (313) and a bathing circulating water return pipeline (314) are arranged between the condenser (312) and the bathing water storage and supply subsystem (4), a bathing circulating water thermometer (315), a condenser soft joint (316), a bathing water circulating water butterfly valve (317), a bathing circulating water filter (318), a bathing circulating water pump soft joint (319), a bathing circulating water pump (320), a bathing circulating water pump soft joint (319), a bathing circulating water check valve (321) and a bathing water circulating water butterfly valve (317) are sequentially arranged on the bathing circulating water supply pipeline (313) along the water flow direction, and bathing circulating water pressure gauges (322) are respectively arranged at two ends of the bathing circulating water pump (320); a bath circulating water butterfly valve (317), a bath circulating water filter (318), a condenser soft joint (316) and a bath circulating water thermometer (315) are sequentially arranged on the bath circulating water return pipeline (314) along the water flow direction.
7. The bathing wastewater waste heat recovery system according to claim 6, wherein the bathing water storage and supply subsystem (4) comprises a bathing water tank (41), the bathing water tank (41) is respectively connected with the bathing circulating water supply pipeline (313), the bathing circulating water return pipeline (314) and a bathing water supply pipeline (42) for supplying water to users, and a bathing water supply butterfly valve (43), a bathing water supply filter (44), a bathing water supply pump soft joint (45), a bathing water supply pressure gauge (46), a bathing water supply pump (47), a bathing water supply pressure gauge (46), a bathing water supply pump soft joint (45), a bathing water supply check valve (48) and a bathing water supply butterfly valve (43) are sequentially arranged on the bathing water supply pipeline (42) along the water flow direction.
8. The bathing wastewater waste heat recovery system according to claim 7, wherein the bathing water tank (41) is provided with a bathing water thermocouple (411) for detecting the temperature of tap water in the bathing water tank (41), a bathing water tank overflow pipe (412) and a bathing water tank manhole (413) for communicating the inside and the outside of the bathing water tank (41), a bathing water tank magnetic float level gauge (414) for measuring the height of the tap water level in the bathing water tank (41), and a bathing water drainage pipe (415) for emergency drainage and pollution discharge of the bathing water tank (41), and the bathing water drainage pipe (415) is provided with a bathing water drainage butterfly valve (416); the bath water thermocouple (411) is in signal connection with the bath water supply pump (47).
9. The bathing wastewater waste heat recovery system according to claim 6, wherein the tap water and low-temperature circulating water replenishing subsystem (5) comprises a tap water pipeline (51), and a tap water butterfly valve (52), a tap water filter (53), a tap water pump soft joint (54), a tap water pressure gauge (55), a tap water pump (56), a tap water pressure gauge (55), a tap water pump soft joint (54), a tap water check valve (57) and a tap water butterfly valve (52) are sequentially arranged on the tap water pipeline (51) along the water flow direction; the tail end of the tap water pipeline (51) is respectively connected with a bathing water supplementing pipeline (58) and a low-temperature circulating water supplementing pipeline (59), the bathing water supplementing pipeline (58) is connected to the bathing water storage and supply subsystem (4), and the low-temperature circulating water supplementing pipeline (59) is connected to the bathing water preparation subsystem (3);
a tap water butterfly valve (52), a tap water electromagnetic valve (581) and a tap water ball float valve (582) are sequentially arranged on the bathing water supplementing pipeline (58) along the water flow direction; the low-temperature circulating water replenishing pipeline (59) is sequentially provided with a tap water butterfly valve (52), a softened water or reverse osmosis water device (591), a softened water or reverse osmosis water inlet butterfly valve (592), a softened water or reverse osmosis water tank (593), a softened water or reverse osmosis water outlet butterfly valve (594), a constant-pressure water replenishing device (595), a water replenishing butterfly valve (596) and a water replenishing pipeline (597) along the water flow direction; a ball float valve, an overflow pipe and a manhole are arranged on the softened water or reverse osmosis water tank (593).
10. A bathing waste water waste heat recovery system according to any one of claims 1-5, wherein the bathing waste water treatment and supply subsystem (1) comprises a bathing waste water supply pipeline (11) for conveying the bathing waste water, a hair filter (12), a sand cylinder filter (13), a bathing waste water pump (14), a bathing waste water check valve (15) and a bathing waste water ball float valve (16) are sequentially arranged on the bathing waste water supply pipeline (11) along the water flow direction, and the bathing waste water ball float valve (16) is positioned in the bathing waste water tank (22); bath wastewater supply butterfly valves (17) are respectively arranged between a water inlet of the bath wastewater supply pipeline (11) and the hair filter (12), between the hair filter (12) and the sand cylinder filter (13), between the sand cylinder filter (13) and the bath wastewater pump (14), and between the bath wastewater check valve (15) and the bath wastewater float valve (16); bath wastewater pressure gauges (18) are respectively arranged at two ends of the bath wastewater pump (14), and bath wastewater pump soft joints (19) are respectively arranged between the sand jar filter (13) and the bath wastewater pump (14) and between the bath wastewater pump (14) and the bath wastewater check valve (15).
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| CN202022026591.3U CN212299548U (en) | 2020-09-16 | 2020-09-16 | Bathing wastewater waste heat recovery system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111998575A (en) * | 2020-09-16 | 2020-11-27 | 中煤科工(天津)清洁能源研究院有限公司 | Bathing wastewater waste heat recovery system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111998575A (en) * | 2020-09-16 | 2020-11-27 | 中煤科工(天津)清洁能源研究院有限公司 | Bathing wastewater waste heat recovery system |
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