CN111141026A - Waste water heat recovery unit - Google Patents
Waste water heat recovery unit Download PDFInfo
- Publication number
- CN111141026A CN111141026A CN201911326163.8A CN201911326163A CN111141026A CN 111141026 A CN111141026 A CN 111141026A CN 201911326163 A CN201911326163 A CN 201911326163A CN 111141026 A CN111141026 A CN 111141026A
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- waste water
- water
- wastewater
- heat
- heat recovery
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention discloses a waste water heat recovery unit, which comprises a waste water tank, wherein one side of the waste water tank is provided with a waste water inlet, the other side of the waste water tank is provided with a waste water outlet, a static evaporation type coil heat exchanger is arranged in the waste water tank, the waste water inlet is connected with a drainage pipeline, the drainage pipeline is connected with a waste water outlet of a bathroom hot water point, the static evaporation type coil heat exchanger is connected with a waste water heat recovery heat pump unit through a copper pipe, the copper pipe of the waste water heat recovery heat pump unit connected with the static evaporation type coil heat exchanger is provided with a heat pump air pipe stop valve and a heat pump liquid pipe stop valve, the waste water heat recovery heat pump unit is connected with a hot water heat preservation water tank, the hot water heat preservation water tank is connected with the bathroom hot water point through a water supply pump, a, the electronic water flow regulating valve is electrically connected with the main board and the operating panel.
Description
Technical Field
The invention relates to the technical field of waste heat utilization, in particular to a waste water heat recovery unit.
Background
At present, the recycling of bathing waste water (shower waste water and foam pool waste water) heat is realized through a water source heat pump waste water heat recovery system, the system working principle is that waste water is pumped to a hair filter, a sand jar filter and other equipment through a sewage submersible pump (heat source side water pump) and then is filtered, and then is sent to a water source heat pump unit heat exchanger (evaporator), and the waste water heat is discharged after being absorbed, but the water source heat pump waste water heat recovery system has the following defects: 1. additional equipment such as a sewage submersible pump, a hair filter, a sand cylinder filter and the like are required to be added for lifting and filtering the sewage, the installation is complex, the capital of the additional equipment and the operating electric charge investment of the water pump are increased, and the installation site of the additional equipment is increased; 2. a wastewater pool water level control device is required to be added to prevent the sewage submersible pump from running in a water shortage manner; 3. a water flow detection switch at the side of the evaporator is required to be added, so that insufficient water flow caused by blockage of a hair filter, a sand cylinder filter, a pipeline and the like or water flow interruption caused by sudden damage and stop of a sewage pump is prevented, and therefore, a heat exchange tube in the evaporator is frozen and cracked due to water shortage in the evaporator, even water enters a fluorine path system, and a water source heat pump unit is scrapped; 4. the method needs to add special staff to clean a hair filter, a sand jar filter and a water source heat pump evaporator regularly, determines the frequency of regular cleaning according to the amount of filtered waste water and the content of pollutants (secretion of human bodies, grease scurf, hair, a large amount of soap and shampoo) in the waste water, and even needs to clean once every 2-3 days, so that the cleaning workload is dirty, and the labor cost is also fussy, therefore, the problem needs to be improved in the process of recycling and converting waste water heat.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a waste water heat recovery unit.
In order to achieve the purpose, the invention adopts the following technical scheme: a waste water heat recovery unit comprises a waste water pool, one side of the waste water pool is provided with a waste water inlet, the other side of the waste water pool is provided with a waste water outlet, a static evaporation type coil heat exchanger is arranged in the waste water pool, the waste water inlet is connected with a drainage pipeline, the drainage pipeline is connected with a waste water outlet of a bathroom hot water point, the static evaporation type coil heat exchanger is connected with a waste water heat recovery heat pump unit through a copper pipe, a heat pump air pipe stop valve and a heat pump liquid pipe stop valve are arranged on the copper pipe connected with the static evaporation type coil heat exchanger, the waste water heat recovery heat pump unit is connected with a hot water heat preservation water tank, the hot water heat preservation water tank is connected with the bathroom hot water point through a water supply pump, a water level sensor is arranged in the hot water heat preservation, the electronic water flow regulating valve is electrically connected with the main board and the operating panel.
The invention has the further improvement that the static evaporation type coil heat exchanger comprises n +1 branches, and electromagnetic valves are arranged at inlets of the first n branches.
The invention has the further improvement that the wastewater outlet is 30cm lower than the upper edge of the wastewater pool, the wastewater outlet is connected with a sewer, a water outlet pipe extends into the wastewater pool and is arranged at a position 20cm away from the bottom of the wastewater pool, the water outlet pipe is in an inverted L shape, the pipe diameter of the water outlet pipe is at least 1 model larger than that of a drainage pipe, and the water inlet and the water outlet are arranged on two opposite surfaces of the wastewater pool.
The invention is further improved in that the static evaporation type coil heat exchanger is arranged above the wastewater tank and is 10cm away from the water level.
The invention has the further improvement that a wastewater temperature sensor is arranged in the wastewater pool, the wastewater temperature sensor is arranged at a position 10cm below the static evaporation type coil heat exchanger, and the wastewater temperature sensor controls a water replenishing signal port of the wastewater pool in the unit to output to the underground water submersible pump.
The invention has the further improvement that the upper end of the wastewater tank is provided with a wastewater tank top cover, and the wastewater tank top cover is provided with an access hole.
The invention has the further improvement that one end of the static evaporation type coil heat exchanger is connected with the heat pump air pipe stop valve through a copper pipe, and the other end of the static evaporation type coil heat exchanger is connected with the heat pump liquid pipe stop valve through the copper pipe.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic side view of the wastewater pond of the present invention.
In the figure: 1-wastewater pool, 2-wastewater inlet, 3-wastewater outlet, 4-static evaporation type coil heat exchanger, 5-drainage pipeline, 6-wastewater outlet, 7-wastewater heat recovery heat pump unit, 8-copper pipe, 9-heat pump air pipe stop valve, 10-heat pump liquid pipe stop valve, 11-hot water heat preservation water tank, 12-bathroom hot water consumption point, 13-water supply pump, 14-water level sensor, 15-electronic water flow regulating valve, 16-compressor, 17-condenser, 18-electromagnetic valve, 19-wastewater temperature sensor, 20-water inlet valve, 21-wastewater pool top cover, 22-maintenance port, 23-water outlet pipe, 24-water outlet temperature sensor, 25-water tank temperature sensor, 26-upper edge of wastewater pool, 3-water outlet, 4-static evaporation type coil heat exchanger, 5-drainage pipeline, 6-wastewater outlet, 7, 27-groundwater submersible pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
A waste water heat recovery unit comprises a waste water tank 1, a waste water inlet 2 is arranged on one side of the waste water tank 1, a waste water outlet 3 is arranged on the other side of the waste water tank, a static evaporation type coil heat exchanger 4 is arranged in the waste water tank 1, the waste water inlet 2 is connected with a drainage pipeline 5, the drainage pipeline 5 is connected with a waste water outlet 6 of a bathroom hot water point 12, the static evaporation type coil heat exchanger 4 is connected with a waste water heat recovery heat pump unit 7 through a copper pipe 8, a heat pump air pipe stop valve 9 and a heat pump liquid pipe stop valve 10 are arranged on the copper pipe 8 connecting the waste water heat recovery heat pump unit 7 and the static evaporation type coil heat exchanger 4, the waste water heat recovery heat pump unit 7 is connected with a hot water heat preservation water tank 11, the hot water heat preservation water tank 11 is connected with the bathroom hot water point 12, the waste water heat recovery heat pump unit 7 is connected with the electronic water flow regulating valve 15, the electronic water flow regulating valve 15 is electrically connected with the main board and the operation panel, the electronic water flow regulating valve 15 is connected with the water inlet valve 20, the heat pump air pipe stop valve 9 is connected with the compressor 16, and the compressor 16 is connected with the condenser 17.
The static evaporation type coil heat exchanger 4 comprises n +1 branches, electromagnetic valves 18 are installed at the inlets of the front n branches, the static evaporation type coil heat exchanger 4 is installed above the wastewater pond 1 and 10cm away from the water level, a wastewater temperature sensor 19 is arranged inside the wastewater pond 1, the wastewater temperature sensor 19 is arranged at the 10cm below the static evaporation type coil heat exchanger 4, the wastewater temperature sensor 19 is connected with the wastewater heat recovery heat pump unit 7, a wastewater pond top cover 21 is arranged at the upper end of the wastewater pond 1, an overhaul port 22 is arranged on the wastewater pond top cover 21, a wastewater water outlet 3 is 30cm lower than an upper edge 26 of the wastewater pond, the wastewater outlet 3 is connected with a sewer, a water outlet pipe 23 extends into the wastewater pond 1 and is arranged 20cm away from the bottom of the wastewater pond 1, and the water outlet pipe 23 is of an inverted L shape, waste water inlet 2 with waste water delivery port 3 sets up two opposite faces of wastewater disposal basin 1, outlet pipe 23 pipe diameter ratio drainage pipe 5 should 1 big model at least, go out water temperature sensor 24 with the interior mainboard of wastewater heat recovery heat pump set 7 is connected, water tank temperature sensor 25 with the interior mainboard of wastewater heat recovery heat pump set 7 is connected, on the wastewater disposal basin bead 26 with wastewater disposal basin top cap 21 is connected, groundwater immersible pump 27 with wastewater disposal basin 1 is connected, when the mainboard detects the interior temperature of wastewater disposal basin and crosses lowly in the wastewater disposal basin in the wastewater heat recovery heat pump set 7, mainboard wastewater moisturizing signal port export groundwater immersible pump 27.
The operation principle is as follows:
1. the direct heating operation principle in the direct heating circulation mode is as follows:
a. and detecting the water level after the machine is started, and immediately putting the machine into direct heating operation if the water level is lower than the low water level or the high water level is disconnected for more than 3 hours or the water level is not higher than the high water level after the machine is electrified for the first time.
The start-up sequence is: the water inlet valve is opened → the water pressure switch is closed after 20 seconds → the compressor is started after 2 seconds;
b. after the compressor is started for 20 seconds, the constant-temperature water outlet electronic water flow regulating valve starts to perform PID automatic water flow regulation according to the set direct-heating water outlet temperature and the actual water outlet temperature;
c. when the water level reaches a high water level, the machine stops direct heating operation; then detecting the temperature of the water tank to inquire whether to enter a circulating operation mode;
d. the closing sequence is: compressor off → 20 seconds after the water inlet valve is closed.
2. The cycle operation principle in the direct heating cycle mode is as follows:
a. entry conditions were as follows: the machine reaches high water level and Tw < P0-P5 (Tw is the hot water holding tank temperature, P0 is the set water temperature, P5 is the start return difference).
And (3) exit conditions: tw > = P0 or high and low water level is disconnected, and the circular operation is exited.
b. Starting a flow: closing the water inlet valve → opening the circulating water pump → closing the water flow switch → opening the compressor.
c. Closing the flow: compressor off → circulating water pump off.
3. Single cycle mode operation:
a. this mode is only entered when the model selection code P7 is set to 0 (0-cycler only, 1-direct heat + cycler), single cycle mode;
b. entering a circulation operation mode as long as Tw < P0-P5, and Tw > = P0 exiting circulation operation;
c. the starting process and the closing process are in the same cycle operation principle in the direct heating cycle mode;
d. automatic water replenishing:
1. if C2 equals 0, water is replenished according to the water level: the high water level closes the water inlet valve and closes, and the high and medium water levels are fully disconnected, the water inlet valve is opened.
2. If C2 is not equal to 0 for water supplement at constant temperature: tw > = C2 and the water level is not full water then the water inlet valve is opened Tw < C2-2 or the water full water inlet valve is closed. (C2 is the temperature setting for water replenishing at the fixed temperature) no water pressure switch is detected in the mode, no matter whether the unit is set to be in the direct heating circulation mode or the single circulation mode, no water is replenished when the panel is in the shutdown state.
The invention has the beneficial effects that:
1. the sewage treatment device has the advantages that additional equipment such as a sewage submersible pump, a hair filter and a sand cylinder filter does not need to be added to lift and filter the sewage, the static evaporation type coil heat exchanger is only required to be arranged at the upper part of a waste water tank to evaporate and absorb heat, the installation is simple, the heat exchanger is connected with a unit by a copper pipe like a split type household air conditioner, the occupied area is small, the capital investment of the additional equipment and the operation electric charge of the sewage submersible pump are saved, and the hidden danger (freezing damage to the heat exchanger) caused by the operation fault of the sewage submersible;
2. the water level control device of the wastewater pool is not needed (water shortage and overflow of the water pool due to failure of the water level control device are avoided), the height drop between the water level of the wastewater pool and the water outlet is applied, the water outlet is 30cm lower than the upper edge opening of the wastewater pool, the water outlet pipe extends into the wastewater pool and is 20cm away from the bottom of the wastewater pool, the unit static evaporation type coil pipe heat exchanger is arranged at the upper part of the wastewater pool and is 10cm away from the water level, the water inlet and the water outlet are arranged at two opposite surfaces of the wastewater pool, when the waste hot water flows in and simultaneously the waste cold water is discharged, the water of the whole wastewater pool flows in two horizontal and vertical dimensions simultaneously, the temperature of the wastewater can be fully absorbed, the hot water in the wastewater pool floats upwards and sinks due to the fact that the hot water ratio is small and the cold water ratio is large, the hot;
3. the water shortage anti-freezing protection is carried out without adding a water flow detection switch at the side of the evaporator; the control circuit in the unit is provided with a waste water temperature sensor and is placed at the position of 10cm below the static evaporation type coil pipe heat exchanger during installation, meanwhile, a waste water tank water replenishing signal port is reserved in the control circuit in the unit, when the water temperature in the waste water tank is reduced to be very low (the low-temperature code C3 can be freely set and is generally set to be 10 ℃), a bathroom bathing area is not replenished with waste water, the temperature and the water level of the hot water heat-preservation water tank cannot meet the shutdown condition, and at the moment, the heat pump unit can normally operate under the following logic control.
A. When the temperature of the wastewater is less than C3, a water replenishing signal is started to replenish other heat sources to the wastewater pool (for example, a groundwater submersible pump is started to replenish water to the wastewater pool);
B. when the wastewater temperature is greater than C3+1, the water replenishing signal is turned off;
C. when the supplement speed of other heat sources is too slow and the wastewater temperature is less than C3-1, the host machine is stopped but does not report faults, and when the wastewater temperature is more than C3+1, the host machine is restarted to operate according to the previous mode;
D. controlled by a panel on/off key, the on state is controlled, and the off state is output closed; the unit absorbs the temperature of the wastewater in most of time, and only when the temperature of the wastewater is less than C3-1 ℃, a small amount of underground water is supplemented, so that underground water resources are not wasted;
4. the cleaning and maintenance are simple, the static evaporation type coil heat exchanger is not arranged in the unit, after the peak bath season of each year is finished, the overhaul port of the wastewater tank is opened, and the coil heat exchanger is directly washed by a tap water gun;
5. aiming at industrial high-temperature waste water heat recovery, a static evaporation type coil heat exchanger is divided into n +1 branches, and electromagnetic valves are installed at inlets of the first n branches (the specific branch number n is determined by calculation of evaporation area and development test according to different models and the temperature of waste water). When the temperature of the waste water is lower than 40 ℃, the electromagnetic valves 1 to n are all opened through a control circuit in the unit, and the full load ensures that the low-temperature liquid refrigerant in the evaporator is completely evaporated; when the temperature of the wastewater is higher than 45 ℃ (the temperature is determined according to actual tests), the electromagnetic valve 1 is closed, the area of the first path of evaporation coil is unloaded to reduce the evaporation capacity, and the phenomenon that the suction superheat degree of the system is too large is prevented; by analogy, when the temperature of the wastewater continues to rise, the coil branches are unloaded one by one until all the coil branches 1 to n are unloaded, and the last coil n +1 is kept normally open; the temperature of the waste water in the bathing industry does not exceed 40 ℃, and the control of an electromagnetic valve on the branch of the coil pipe is not needed;
6. the unit adopts a direct heating circulation mode, the direct heating mode is used as soon as burning, and the circulation mode is used for increasing the water temperature and preserving heat again; the machine may also be set to run in a single cycle mode; the operation mode is freely set, and the requirements of different users are met. When the direct heating circulation mode is adopted, the main board is provided with the independent constant-temperature water outlet electronic water flow regulating valve, a user can select a manual mode or an automatic mode, the constant-temperature water outlet electronic water flow regulating valve is used in seamless connection with the main board in the unit, all operations related to the constant-temperature water outlet electronic water flow regulating valve can be executed on the main board operation panel, the constant-temperature water outlet electronic water flow regulating valve is controlled by a quick and accurate PID algorithm, the direct heating water outlet temperature can accurately reach the user set temperature, and the system control is more reasonable and more humanized. The method has the characteristics of strong practicability and strong operability, and has wide market application prospect.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The utility model provides a waste water heat recovery unit which characterized in that: the device comprises a wastewater pool, wherein one side of the wastewater pool is provided with a wastewater inlet, the other side of the wastewater pool is provided with a wastewater outlet, a static evaporation type coil heat exchanger is arranged in the wastewater pool, the wastewater inlet is connected with a drainage pipeline, the drainage pipeline is connected with a wastewater outlet of a bathroom hot water point, the static evaporation type coil heat exchanger is connected with a wastewater heat recovery heat pump unit through a copper pipe, a heat pump air pipe stop valve and a heat pump liquid pipe stop valve are arranged on the copper pipe connected with the static evaporation type coil heat exchanger, the wastewater heat recovery heat pump unit is connected with a hot water heat preservation water tank, the hot water heat preservation water tank is connected with the bathroom hot water point through a water supply pump, a water level sensor is arranged in the hot water heat preservation water tank, the wastewater heat recovery, the electronic water flow regulating valve is electrically connected with the main board and the operating panel.
2. The waste water heat recovery unit according to claim 1, characterized in that: the static evaporation type coil heat exchanger comprises n +1 branches, and electromagnetic valves are installed at inlets of the first n branches.
3. The waste water heat recovery unit according to claim 1, characterized in that: the waste water outlet is 30cm lower than the upper edge of the waste water tank, the waste water outlet is connected with a sewer, a water outlet pipe penetrates into the waste water tank and is arranged 20cm away from the bottom of the waste water tank, the water outlet pipe is of an inverted L shape, the pipe diameter of the water outlet pipe is at least 1 model larger than that of a drainage pipe, and the water inlet and the water outlet are arranged on two opposite surfaces of the waste water tank.
4. The waste water heat recovery unit according to claim 1, characterized in that: the static evaporation type coil heat exchanger is arranged above the wastewater tank and 10cm away from the water level.
5. The waste water heat recovery unit according to claim 1, characterized in that: the waste water temperature sensor is arranged in the waste water pool and is arranged at a position 10cm below the static evaporation type coil heat exchanger, and the waste water temperature sensor controls a water replenishing signal port of the waste water pool in the unit to output water to the underground water submersible pump.
6. The waste water heat recovery unit according to claim 1, characterized in that: the upper end of the wastewater pond is provided with a wastewater pond top cover, and the wastewater pond top cover is provided with an access hole.
7. The waste water heat recovery unit according to claim 1, characterized in that: one end of the static evaporation type coil heat exchanger is connected with the heat pump air pipe stop valve through a copper pipe, and the other end of the static evaporation type coil heat exchanger is connected with the heat pump liquid pipe stop valve through the copper pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911326163.8A CN111141026A (en) | 2019-12-20 | 2019-12-20 | Waste water heat recovery unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911326163.8A CN111141026A (en) | 2019-12-20 | 2019-12-20 | Waste water heat recovery unit |
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| Publication Number | Publication Date |
|---|---|
| CN111141026A true CN111141026A (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911326163.8A Pending CN111141026A (en) | 2019-12-20 | 2019-12-20 | Waste water heat recovery unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115435412A (en) * | 2021-06-04 | 2022-12-06 | 武汉市无穷大能源科技有限公司 | Ground heat exchange device and using method thereof in heating and refrigerating |
-
2019
- 2019-12-20 CN CN201911326163.8A patent/CN111141026A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115435412A (en) * | 2021-06-04 | 2022-12-06 | 武汉市无穷大能源科技有限公司 | Ground heat exchange device and using method thereof in heating and refrigerating |
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