CN111089325A - Boiler heat supply system and heat supply method thereof - Google Patents
Boiler heat supply system and heat supply method thereof Download PDFInfo
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- CN111089325A CN111089325A CN201911293726.8A CN201911293726A CN111089325A CN 111089325 A CN111089325 A CN 111089325A CN 201911293726 A CN201911293726 A CN 201911293726A CN 111089325 A CN111089325 A CN 111089325A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 616
- 238000010438 heat treatment Methods 0.000 claims abstract description 198
- 239000008236 heating water Substances 0.000 claims description 66
- 230000001105 regulatory effect Effects 0.000 claims description 32
- 239000008400 supply water Substances 0.000 claims description 18
- 230000001276 controlling effect Effects 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 7
- 230000001502 supplementing effect Effects 0.000 description 12
- 238000009434 installation Methods 0.000 description 8
- 238000012544 monitoring process Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000003287 bathing Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1058—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system disposition of pipes and pipe connections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
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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
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/48—Water heaters for central heating incorporating heaters for domestic water
- F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
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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
- F24H9/12—Arrangements for connecting heaters to circulation pipes
- F24H9/13—Arrangements for connecting heaters to circulation pipes 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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- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The invention discloses a boiler heat supply system and a heat supply method thereof, and belongs to the technical field of heat supply systems. The boiler heating system comprises a heating system, a heating system and a water supply system; the water supply system comprises a secondary water supply system, and the secondary water supply system comprises a heating loop connected with the heating system and a heated loop connected with the water supply system. Compared with the prior art, the boiler heating system provided by the invention can provide warm water supply for users in time, reduce waiting time and reduce waste of water resources; meanwhile, hot water after heat exchange of the heating system is recycled for secondary heat exchange, and the heat energy utilization rate of the heating system is improved.
Description
Technical Field
The invention belongs to the technical field of heating systems, and particularly relates to a boiler heating system and a heating method thereof.
Background
Along with the continuous improvement of the living standard of people, the attention degree of people to the quality of life is higher and higher, and in cold winter, heating is realized in many cities, especially in northern areas. The existing heating system mainly adopts a boiler central heating mode to realize heating and hot water supply for users and improve the life quality of people.
At present, a heating system mainly adopts a water heating mode, water temperature is increased through boiler heating, and then the water temperature of household heating water of a user and the water temperature of domestic water are increased through a heat exchanger, so that the purpose of heating is achieved.
In actual life, in order to keep the indoor warm state, the heater is generally in a long-time heating state; the domestic water is intermittent, and the heat exchange process of the heat exchanger needs a certain time, so that in general, when the domestic water is used by a user, the user usually opens the faucet for a period of time to drain cold water in the water pipe, and the water in the water pipe is heated by the heat exchanger before being used, so that waste of water resources is caused.
Disclosure of Invention
The invention provides a boiler heating system and a heating method thereof, which aim to optimize the performance of the existing boiler heating system.
In order to achieve the purpose, the invention adopts the following technical scheme:
a boiler heating system comprising: heating system, water supply system, wherein:
the heating system comprises a boiler, a boiler water outlet pipe connected with the boiler and a boiler water return pipe connected with the boiler;
the heating system comprises a heating water inlet pipe connected with the water outlet end of a boiler water outlet pipe, a heating heat exchanger connected with the water outlet end of the heating water inlet pipe, a heating water return pipe connected with the heating heat exchanger, a heating user side for heating a user, a heating water outlet pipe connected with the heating user side and a heating water return pipe connected with the heating user side, wherein the heating water return pipe is communicated with the boiler water return pipe, the water outlet end of the heating water outlet pipe is connected with the heating heat exchanger, and the water inlet end of the heating water return pipe is connected with the heating heat exchanger;
the water supply system comprises a water supply inlet pipe connected with the water outlet end of the boiler water outlet pipe, a water supply heat exchanger connected with the water outlet end of the water supply inlet pipe, a water supply return pipe connected with the water supply heat exchanger, a hot water user side for providing hot water for users, a cold water outlet pipe connected with the hot water user side, and a hot water return pipe connected with the hot water user side, wherein the water outlet end of the cold water outlet pipe is connected with the water supply heat exchanger, the water inlet end of the hot water return pipe is connected with the water supply heat exchanger, the water supply inlet pipe of the water supply system is connected with the heating inlet pipe of the heating system in parallel, and the water outlet end of the water; the water supply system further comprises a secondary water supply system, the secondary water supply system comprises a heating loop and a heated loop, the heating loop of the secondary water supply system is connected with the heating system, and the heated loop of the secondary water supply system is connected with the water supply system.
In a further embodiment, the secondary water supply system comprises: the heating system comprises a secondary water supply inlet pipe, a secondary water supply heat exchanger, a secondary water supply return pipe, a secondary cold water inlet pipe and a secondary warm water outlet pipe, wherein the secondary water supply inlet pipe, the secondary water supply heat exchanger and the secondary water supply return pipe are sequentially connected in series to form a heating loop; after the heating system heats a client, the temperature of hot water in the heating water return pipe is still higher than the normal temperature, the hot water in the heating water return pipe flows through the secondary water supply heat exchanger through the secondary water supply water inlet pipe for heat exchange, cold water in the secondary cold water inlet pipe is subjected to heat exchange through the secondary water supply heat exchanger, the temperature of the cold water rises to become warm water, and the warm water flows from the secondary warm water outlet pipe to the hot water return pipe to provide domestic warm water for the client; keep having hot water to flow in the second grade water supply inlet tube continuously, make the warm water of prestoring in the second grade warm water outlet pipe through the heat exchange of second grade water supply heat exchanger, second grade warm water outlet pipe and hot water wet return intercommunication to can ensure that there is the warm water to prestore in the hot water wet return.
In a further embodiment, the aperture of the secondary cold water inlet pipe is smaller than that of the cold water outlet pipe, and the aperture of the secondary warm water outlet pipe is smaller than that of the hot water return pipe; through this setting, the warm water volume is prestore in the reduction to the warm water that makes prestore keeps suitable temperature, avoids leading to prestore the warm water volume too big because of the aperture of second grade cold water inlet tube and warm water outlet pipe is too big, and then leads to prestore the temperature of warm water lower.
In a further embodiment, a flow monitor is arranged at one end of the hot water return pipe close to a hot water user end, a first three-way regulating valve is arranged at the joint of the heating return pipe and the secondary water supply inlet pipe, a second three-way regulating valve is arranged at the joint of the boiler outlet pipe and the heating inlet pipe as well as the water supply inlet pipe, the first three-way regulating valve controls the flow of hot water in the heating return pipe into the secondary water supply inlet pipe according to the feedback data of the flow monitor, the second three-way regulating valve controls the flow of hot water in the boiler outlet pipe into the water supply inlet pipe according to the feedback data of the flow monitor, the water using state of a user is confirmed by arranging the flow monitor, when the user uses water for a short time, the pre-stored warm water in the secondary warm water outlet pipe is directly used or the first three-way regulating valve, the second-stage warm water outlet pipe supplies warm water; when a user uses water for a long time, the second three-way regulating valve regulates to enable the high-temperature hot water part of the boiler water outlet pipe to flow into the water supply water inlet pipe, then the cold water supplied by the cold water outlet pipe is raised in temperature through heat exchange of the water supply heat exchanger and is supplied to the user through the hot water return pipe.
In a further embodiment, heating wet return, water supply wet return and the one end that second grade water supply wet return is close to boiler wet return all are equipped with the check valve, avoid the water reflux in the boiler wet return through setting up the check valve.
In a further embodiment, the one end that the heating installation wet return is close to the heating installation user side is equipped with temperature sensor, the flow that the hot water in the second three way control valve according to the temperature sensor feedback data control boiler outlet pipe enters into the heating inlet tube, can obtain the temperature of the heating installation water in the heating installation wet return through temperature sensor, compare this temperature and adjust the second three way control valve with normal heating temperature, the hot water flow of control heating inlet tube, and then the heat exchange capacity of control heating heat exchanger, the regulation of the temperature of the heating installation water in the realization is to the heating installation wet return.
In a further embodiment, the boiler heating system further comprises a return water compensation system, the return water compensation system comprises a water supplementing tank, a water supplementing pipe connected with the water supplementing tank, a water level sensor arranged on the boiler and an electromagnetic valve for controlling connectivity of the water supplementing pipe according to feedback data of the water level sensor, the electromagnetic valve is arranged on the water supplementing pipe, water quantity supplementation can be performed on the heating system through the arrangement of the return water compensation system, and the situation that the return water quantity of the boiler is insufficient due to pipeline leakage is prevented.
In order to achieve the purpose, the invention also adopts the following technical scheme:
a heating method of a boiler heating system, comprising the steps of:
step 1: the boiler is heated to generate hot water, the hot water enters the heating system and the water supply system through the boiler water outlet pipe, and the second three-way regulating valve regulates the flow of the hot water in the boiler water outlet pipe entering the heating water inlet pipe of the heating system and the flow of the water supply water inlet pipe of the water supply system;
step 2: the hot water entering the heating water inlet pipe flows into the heating heat exchanger, the cold water entering the heating heat exchanger through the heating water outlet pipe is heated through heat exchange, then flows to a heating user end through a heating water return pipe to supply heat for a user, and the temperature of the hot water entering the heating heat exchanger through the heating water inlet pipe is reduced and enters the heating water return pipe;
and step 3: hot water entering the water supply inlet pipe flows into the water supply heat exchanger, and the water supply heat exchanger performs heat exchange to ensure that the temperature of cold water flowing into the water supply heat exchanger from the cold water outlet pipe is increased and then flows to a hot water user side from the hot water return pipe to provide high-temperature domestic water for a user; part of hot water in the heating return pipe exchanges heat through the secondary water supply heat exchanger to enable the secondary warm water outlet pipe to supply warm water, and the warm water flows to a hot water user side through the hot water return pipe to provide domestic warm water for users;
and 4, step 4: and the cooled hot water in the heating water return pipe, the water supply water return pipe and the secondary water supply water return pipe flows back to the boiler through the boiler water return pipe to be heated again.
In a further embodiment, the step 3 of obtaining the domestic water supply by the user mainly comprises the following steps:
step 301: partial hot water in the heating return pipe flows through the secondary water supply heat exchanger, and the secondary water supply heat exchanger enables warm water to be prestored in the secondary warm water outlet pipe through heat exchange;
step 302: the flow monitor monitors the water flow in the hot water return pipe, the flow monitor monitors the continuous water use of a user within 30 seconds, the secondary water supply heat exchanger continuously performs heat exchange, and the warm water prestored in the secondary warm water outlet pipe provides domestic water for the user; the flow monitor monitors that the temperature of the domestic water obtained by a user is increased after the temperature of the outlet water of the second-stage warm water outlet pipe subjected to heat exchange is increased by adjusting the first three-way regulating valve for continuously using water by the user within 1 minute so that all the hot water in the heating water return pipe enters the second-stage water supply heat exchanger through the second-stage water supply inlet pipe; the flow monitor monitors that a user continuously uses water for more than 1 minute, the second three-way regulating valve regulates to enable the high-temperature hot water part of the water outlet pipe of the boiler to flow through the water supply heat exchanger through the water supply inlet pipe, and the cold water of the cold water outlet pipe rises through the heat exchange temperature of the water supply heat exchanger and provides high-temperature domestic water for the user through the hot water return pipe.
Has the advantages that: compared with the prior art, the invention mainly has the following advantages:
1. hot water in the heating return pipe continuously exchanges heat through the secondary water supply heat exchanger, so that warm water is continuously pre-stored in the secondary warm water outlet pipe, the secondary warm water outlet pipe is connected with the hot water return pipe, the warm water is kept pre-stored in the hot water return pipe, when a user uses domestic water, warm water supply can be obtained, long-time waiting is not needed, and water resource waste is reduced;
2. the hot water after the heat exchange of the heating system is recycled for secondary heat exchange, so that the domestic warm water is provided for users, and the utilization rate of the heat energy of the heating system is improved.
Drawings
Fig. 1 is a schematic connection diagram of a boiler heating system of the present invention.
The reference signs are: the boiler comprises a boiler 10, a boiler water outlet pipe 11, a boiler water return pipe 12, a water pump 13, a heating water inlet pipe 20, a heating heat exchanger 21, a heating water return pipe 22, a check valve 23, a heating user side 24, a heating water outlet pipe 25, a heating water return pipe 26, a temperature sensor 261, a water supply water inlet pipe 30, a water supply heat exchanger 31, a water supply water return pipe 32, a hot water user side 33, a cold water outlet pipe 34, a hot water return pipe 35, a flow monitor 351, a secondary water supply water inlet pipe 360, a secondary water supply heat exchanger 361, a secondary water supply water return pipe 362, a secondary cold water inlet pipe 363, a secondary warm water outlet pipe 364, a first three-way regulating valve 40, a second three-way regulating valve.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.
Along with the continuous improvement of people's standard of living, heating is realized in some cities especially northern city, and heating system mainly adopts the hot-water heating mode at present, makes the temperature rise through boiler heating, then realizes the rising of user's family heating installation temperature and domestic water's temperature through heat exchanger to realize the purpose of heating. In actual life, use domestic water mostly to be the condition of intermittent and continuous, because heat exchanger heat transfer process needs certain time with domestic water heating to the uniform temperature, consequently, the user when using domestic water, can open tap a period of time usually, just uses after waiting the heat exchanger to heat the water in the water pipe with cold water in the water pipe, causes the very big waste of water resource.
Researches of researchers find that the indoor space is large, the indoor temperature can be increased only after a long time when the heating is carried out by utilizing the heating, and a large amount of heat needs to be consumed in the starting process of the heating, so that the heating is generally in a long-time heating state in order to ensure that the indoor space is in a warm state for a long time. The hot water after the boiler heating carries out the heat exchange through heat exchanger and heating installation water after the temperature reduces and the interior reheating of backward flow to the boiler, though the hot water temperature after carrying out the heat exchange reduces to some extent, but still is higher than the normal atmospheric temperature, consequently the inventor designs and adopts the backward flow hot water after the heating to carry out heat exchange once more and continuously heats domestic water, can obtain the warm water immediately when the user uses domestic water to reduce domestic water's waste, and can also improve the thermal utilization ratio of heating system.
The invention provides a boiler heating system, comprising: heating system, water supply system.
Specifically, as shown in fig. 1, the heating system in this embodiment includes a boiler 10, a boiler water outlet pipe 11 connected to the boiler 10, and a boiler water return pipe 12 connected to the boiler 10, and the boiler 10 is used to heat and generate high-temperature water, the high-temperature water exchanges heat with a heating system and a water supply system through the boiler water outlet pipe 11, and the temperature of the high-temperature water after heat exchange is reduced and the high-temperature water enters the boiler 10 again through the boiler water return pipe 12 to be heated repeatedly. In order to smoothly flow the water in the boiler return pipe 12 into the boiler 10, a water pump 13 is provided on the boiler return pipe 12, and the water pump 13 is operated to suck the water in the boiler return pipe 12 into the boiler 10.
The heating system in this embodiment includes heating inlet tube 20, heating heat exchanger 21, heating wet return 22 that establish ties in proper order, and wherein heating inlet tube 20 keeps away from the one end of heating heat exchanger 21 and the play water end intercommunication of boiler outlet pipe 11, and heating wet return 22 and boiler wet return 12 intercommunication in order to prevent that the water in boiler wet return 12 from flowing back to heating wet return 22 in, the one end that heating wet return 22 is close to boiler wet return 12 still is equipped with a check valve 23. The heating system in this embodiment still includes heating user end 24, heating outlet pipe 25, heating wet return 26, and heating user end 24, heating outlet pipe 25, heating heat exchanger 21 and the closed series connection of heating wet return 26, the hot water of boiler 10 gets into heating inlet tube 20 through boiler outlet pipe 11 and then flows into boiler wet return 12 through heating wet return 22 after carrying out the heat exchange through heating heat exchanger 21, the heating water in heating outlet pipe 25 gets into heating heat exchanger 21 and is heated the back temperature rise through the heat exchange and flows to heating user end 24 through heating wet return 26 and provide the heating of heating for the user.
The water supply system in the embodiment comprises a water supply inlet pipe 30, a water supply heat exchanger 31 and a water supply return pipe 32 which are sequentially connected in series, wherein one end of the water supply inlet pipe 30, which is far away from the water supply heat exchanger 31, is communicated with the water outlet end of the boiler water outlet pipe 11, and the water supply inlet pipe 30 and the heating inlet pipe 20 are in a parallel state; the water outlet end of the water supply return pipe 32 is connected to the boiler return pipe 12, and a check valve 23 is disposed at an end of the water supply return pipe 32 near the water return end of the boiler 10 in order to prevent the water in the boiler return pipe 12 from flowing back into the water supply return pipe 32. The water supply system in this embodiment further includes a hot water user side 33, a cold water outlet pipe 34 and a hot water return pipe 35, and meanwhile, the hot water user side 33, the cold water outlet pipe 34, the water supply heat exchanger 31 and the hot water return pipe 35 are connected in series in a closed manner, and hot water of the boiler 10 enters the water supply inlet pipe 30 through the boiler outlet pipe 11, then enters the boiler return pipe 12 through the water supply heat exchanger 31 after heat exchange, and then flows through the water supply return pipe 32, and when the user uses domestic water, cold water enters the water supply heat exchanger 31 through the cold water outlet pipe 34 to heat exchange, and then the temperature rises and then flows to the hot water user side 33 through the hot water return pipe.
The water supply system in this embodiment further includes a secondary water supply system, wherein the secondary water supply system includes a heating loop formed by sequentially connecting a secondary water supply inlet pipe 360, a secondary water supply heat exchanger 361, and a secondary water supply return pipe 362 in series, and a heating loop formed by sequentially connecting a secondary cold water inlet pipe 363, a secondary water supply heat exchanger 361, and a secondary warm water outlet pipe 364 in series; and the heating loop of the secondary water supply system is connected with the heating system, and the heated loop of the secondary water supply system is connected with the water supply system. Specifically, the water inlet end of the secondary water supply inlet pipe 360 is connected to the heating water outlet pipe, the water outlet end of the secondary water supply outlet pipe is connected to the boiler return pipe 12, the secondary cold water inlet pipe 363 is connected to the cold water outlet pipe 34 in parallel, and the secondary warm water outlet pipe 364 is connected to the hot water return pipe 35. To prevent water in the boiler return pipe 12 from flowing back into the secondary supply water return pipe 362, a check valve 23 is also provided at an end of the secondary supply water return pipe 362 adjacent to the boiler return pipe 12. After the heating system heats a customer, the temperature of hot water in the heating water return pipe 22 is still higher than the normal temperature, the hot water in the heating water return pipe 22 flows through the secondary water supply heat exchanger 361 through the secondary water supply water inlet pipe 360 for heat exchange, and cold water in the secondary cold water inlet pipe 363 is subjected to heat exchange through the secondary water supply heat exchanger 361 and then is heated to become warm water, and the warm water flows to the hot water return pipe 35 from the secondary warm water outlet pipe 364 for providing domestic warm water for the customer; keep having hot water to flow in the second grade water inlet pipe 360 continuously, make prestore the warm water in the second grade warm water outlet pipe 364 through the heat exchange of second grade water heat exchanger 361, second grade warm water outlet pipe 364 and hot water wet return 35 intercommunication to it prestores to have the warm water in the hot water wet return 35 to ensure.
Of course, since the heating system performs heat exchange in the process of providing the user with the heating air supply, the temperature of the hot water in the heating water return pipe 22 is not too high, and thus the degree of heat exchange is not too high when the cold water of the secondary water supply system is heated by performing heat exchange with the hot water in the heating water return pipe 22. Therefore, in a further embodiment, the aperture of the secondary cold water inlet pipe 363 is smaller than that of the cold water outlet pipe 34, and the aperture of the secondary warm water outlet pipe 364 is smaller than that of the hot water return pipe 35; through this setting, reduce the hot water volume that second grade water supply system needs the heating, though can reduce to a certain extent and prestore the warm water volume, but can make the warm water of prestoring keep appropriate temperature to avoided leading to prestoring the warm water volume too big because of the aperture of second grade cold water inlet tube 363 and second grade warm water outlet pipe 364 is too big, and then lead to prestoring the lower condition of temperature of warm water.
In practical application, the condition of short service time often exists when using domestic water, and a water supply system needs a certain time for heating hot water; therefore, there is often a problem in that the water is finished and the hot water is not supplied, which causes a waste of heat of the heating system and increases expenses of the home. In a further embodiment, a flow monitor 351 is disposed at an end of the hot water return pipe 35 close to the hot water user end 33, a first three-way regulating valve 40 is disposed at a connection position of the heating water return pipe 22 and the secondary water supply inlet pipe 360, a second three-way regulating valve 41 is disposed at a connection position of the boiler water outlet pipe 11, the heating water inlet pipe 20 and the water supply inlet pipe 30, the first three-way regulating valve 40 controls a flow rate of hot water in the heating water return pipe 22 entering the secondary water supply inlet pipe 360 according to feedback data of the flow monitor 351, and the second three-way regulating valve 41 controls a flow rate of hot water in the boiler water outlet pipe 11 entering the water supply inlet pipe 30 according to feedback data. The flow monitor 351 confirms the water using state of the user by monitoring the flow of the water body in the hot water return pipe 35, when the user uses water for a short time, such as washing hands, the pre-stored warm water of the secondary warm water outlet pipe 364 is directly supplied or the first three-way regulating valve 40 is regulated to increase the hot water flow of the secondary water supply pipe, improve the heat exchange quantity of the secondary water supply heat exchanger 361, and carry out heat exchange on the cold water of the secondary cold water inlet pipe 363 so that the secondary warm water outlet pipe 364 supplies warm water; when the user uses water for a long time, such as bathing, washing vegetables, etc., the second three-way regulating valve 41 regulates to make the high-temperature hot water portion of the boiler outlet pipe 11 flow into the feed water inlet pipe 30, and then the cold water supplied from the cold water outlet pipe 34 is raised in temperature by heat exchange through the feed water heat exchanger 31 and supplied to the user through the hot water return pipe 35. And a proper water supply mode is selected according to the water using state of a user, so that the heat of the heating system is saved, and the expense for using the heating system is further reduced. The flow monitor in the embodiment adopts an electromagnetic flow meter with the model number of LDG-MIK-DN50-V1-B2-C1-D1-E1, and a proper electromagnetic flow meter can be selected according to the size of the pipe diameter in practical application.
When the heating system is used for heating, people sometimes feel that the heating temperature is high, and sometimes feel that the heating temperature is appropriate, because the hot water supplied by the boiler 10 is caused by temperature fluctuation in the transmission process, so that it is very important to keep the temperature of the heating constant. In a further embodiment, a temperature sensor 261 is arranged at one end of the heating water return pipe 26 close to the heating user end 24, the second three-way regulating valve 41 controls the flow rate of hot water in the boiler water outlet pipe 11 entering the heating water inlet pipe 20 according to data fed back by the temperature sensor 261, the temperature of heating water in the heating water return pipe 26 can be obtained through the temperature sensor 261, the second three-way regulating valve 41 is regulated by comparing the temperature with a normal heating temperature, the hot water flow rate of the heating water inlet pipe 20 is controlled, the heat exchange quantity of the heating heat exchanger 21 is further controlled, the temperature of the heating water in the heating water return pipe 26 is regulated, the temperature sensor in the embodiment adopts a small temperature sensor with the model of XC-T-PT100-ZG, the temperature monitoring can reach 250 ℃, and the boiler heating system is suitable for the application.
In order to solve the problem that the heating system may have insufficient water return of the boiler 10 due to leakage or the like during use, the boiler heating system in the embodiment further includes a water return compensation system. The backwater compensation system comprises a water supplementing tank 50, a water supplementing pipe 51 connected with the water supplementing tank 50, a water level sensor 52 arranged on the boiler 10 and an electromagnetic valve 53 for controlling the connectivity of the water supplementing pipe 51 according to feedback data of the water level sensor 52, wherein a battery valve is arranged on the water supplementing pipe 51, the water level sensor 52 monitors the water level of the boiler 10 in real time, when the water level of the boiler 10 is lower than a set value, the backwater of the boiler 10 is confirmed to be insufficient, the electromagnetic valve 53 is opened, and water in the water supplementing tank 50 flows into the boiler backwater pipe 12 through the water supplementing pipe 51, so that backwater compensation. The water quantity can be supplemented to the heating system by arranging the return water compensation system, and the condition that the return water quantity of the boiler 10 is insufficient due to pipeline leakage is prevented. The battery valve 53 in this embodiment is a water-gas universal solenoid valve of type WZW-DN 50. The water level sensor in the embodiment adopts a liquid level transmitter with the model of CYW18-X-L3-A1-C-G2, the temperature of a working medium can reach 180 ℃ at most, and the use requirement of the boiler heating system provided by the application is met.
The working principle is as follows: the boiler 10 is heated to generate hot water, the hot water enters the heating system and the water supply system through the boiler water outlet pipe 11, and the second three-way regulating valve 41 regulates the flow of the hot water in the boiler water outlet pipe 11 entering the heating water inlet pipe 20 of the heating system and the flow of the water supply water inlet pipe 30 of the water supply system. The hot water entering the heating water inlet pipe 20 flows into the heating heat exchanger 21, the cold water entering the heating heat exchanger 21 through the heating water outlet pipe 25 is heated by heat exchange temperature and then flows to the heating user terminal 24 through the heating water return pipe 26 to supply heat to the user, and the temperature of the hot water entering the heating heat exchanger 21 through the heating water inlet pipe 20 is reduced and enters the heating water return pipe 22. Part of hot water in the heating return pipe flows through a secondary water supply heat exchanger 361, and the secondary water supply heat exchanger 361 leads the warm water to be prestored in a secondary warm water outlet pipe 364 through heat exchange; the flow monitor 351 monitors the flow of water in the hot water return pipe 35, the flow monitor 351 monitors the continuous water use of the user within 30 seconds, the secondary water supply heat exchanger 361 continuously carries out heat exchange, and the warm water prestored in the secondary warm water outlet pipe 364 provides domestic water for the user; the flow monitor 351 monitors that the temperature of the domestic water obtained by the user is increased after the user continuously uses the water by adjusting the first three-way adjusting valve 40 within 1 minute so that all the hot water in the heating water return pipe 22 enters the secondary water supply heat exchanger 361 through the secondary water supply inlet pipe 360, and the temperature of the outlet water of the secondary warm water outlet pipe 364 after heat exchange is increased; the flow monitor 351 monitors the continuous water use of the user for more than 1 minute, the second three-way regulating valve 41 regulates the high-temperature hot water portion of the boiler water outlet pipe 11 to flow through the water supply heat exchanger 31 through the water supply inlet pipe 30, and the cold water of the cold water outlet pipe 34 is raised in temperature through the heat exchange of the water supply heat exchanger 31 and provides the high-temperature domestic water for the user through the hot water return pipe 35. The cooled hot water in the heating water return pipe 22, the supply water return pipe 32, and the secondary supply water return pipe 362 returns to the boiler 10 through the boiler water return pipe 12 to be heated again. In the process, hot water in the heating return pipe continuously exchanges heat through the secondary water supply heat exchanger 361, so that warm water is continuously pre-stored in the secondary warm water outlet pipe 364, the secondary warm water outlet pipe 364 is connected with the hot water return pipe 35, the warm water is kept pre-stored in the hot water return pipe 35, when a user uses practical domestic water, warm water supply can be obtained, long-time waiting is not needed, and water resource waste is reduced; meanwhile, the hot water after heat exchange is carried out by the heating system is used for carrying out secondary heat exchange, so that the domestic warm water is provided for users, and the utilization rate of heat energy of the heating system is improved.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the embodiments, and various equivalent changes can be made to the technical solution of the present invention within the technical idea of the present invention, and these equivalent changes are within the protection scope of the present invention.
Claims (9)
1. A boiler heating system, comprising:
the heating system comprises a boiler, a boiler water outlet pipe connected with the boiler and a boiler water return pipe connected with the boiler;
the heating system comprises a heating water inlet pipe connected with the water outlet end of a boiler water outlet pipe, a heating heat exchanger connected with the water outlet end of the heating water inlet pipe, a heating water return pipe connected with the heating heat exchanger, a heating user side for heating a user, a heating water outlet pipe connected with the heating user side and a heating water return pipe connected with the heating user side, wherein the heating water return pipe is communicated with the boiler water return pipe, the water outlet end of the heating water outlet pipe is connected with the heating heat exchanger, and the water inlet end of the heating water return pipe is connected with the heating heat exchanger;
the water supply system comprises a water supply inlet pipe connected with the water outlet end of a boiler water outlet pipe, a water supply heat exchanger connected with the water outlet end of the water supply inlet pipe, a water supply return pipe connected with the water supply heat exchanger, a hot water user side for providing hot water for users, a cold water outlet pipe connected with the hot water user side, and a hot water return pipe connected with the hot water user side, wherein the water outlet end of the cold water outlet pipe is connected with the water supply heat exchanger, the water inlet end of the hot water return pipe is connected with the water supply heat exchanger, the water supply inlet pipe of the water supply system is connected with a heating inlet pipe of a heating system in parallel, and the water outlet end of the water supply; the water supply system further comprises a secondary water supply system, the secondary water supply system comprises a heating loop and a heated loop, the heating loop of the secondary water supply system is connected with the heating system, and the heated loop of the secondary water supply system is connected with the water supply system.
2. A boiler heating system according to claim 1, wherein said secondary water supply system comprises: second grade water supply inlet tube, second grade water supply heat exchanger, second grade water supply wet return, second grade cold water inlet tube and second grade warm water outlet pipe, second grade water supply inlet tube, second grade water supply heat exchanger and second grade water supply wet return establish ties in proper order and form the heating return circuit, second grade cold water inlet tube, second grade water supply heat exchanger and second grade warm water outlet pipe establish ties in proper order and form the heating return circuit, the end of intaking of second grade water supply inlet tube and heating water piping connection, the water outlet end and the boiler wet return of second grade water supply outlet pipe are connected, second grade cold water inlet tube is parallelly connected with the cold water outlet pipe, second grade.
3. The boiler heating system according to claim 2, wherein the aperture of the secondary cold water inlet pipe is smaller than the aperture of the cold water outlet pipe, and the aperture of the secondary warm water outlet pipe is smaller than the aperture of the hot water return pipe.
4. The boiler heating system according to claim 2, wherein a flow monitor is disposed at an end of the hot water return pipe close to the hot water user side, a first three-way regulating valve is disposed at a junction of the heating return pipe and the secondary water supply inlet pipe, a second three-way regulating valve is disposed at a junction of the boiler outlet pipe and the heating inlet pipe and the water supply inlet pipe, the first three-way regulating valve controls a flow of hot water in the heating return pipe into the secondary water supply inlet pipe according to feedback data of the flow monitor, and the second three-way regulating valve controls a flow of hot water in the boiler outlet pipe into the water supply inlet pipe according to feedback data of the flow monitor.
5. A boiler heating system according to any one of claims 2-4, characterised in that the ends of the heating return, the supply return and the secondary supply return adjacent the boiler return are provided with a non-return valve.
6. The boiler heating system according to claim 4, wherein a temperature sensor is disposed at an end of the heating water return pipe close to the heating user side, and the second three-way regulating valve controls a flow rate of the hot water in the boiler water outlet pipe into the heating water inlet pipe according to feedback data of the temperature sensor.
7. The boiler heating system according to claim 1, further comprising a return water compensation system, the return water compensation system comprising a water replenishing tank, a water replenishing pipe connected to the water replenishing tank, a water level sensor provided on the boiler, and an electromagnetic valve controlling connectivity of the water replenishing pipe according to feedback data of the water level sensor, the electromagnetic valve being provided on the water replenishing pipe.
8. A heating method of a boiler heating system is characterized by comprising the following steps:
step 1: the boiler is heated to generate hot water, the hot water enters the heating system and the water supply system through the boiler water outlet pipe, and the second three-way regulating valve regulates the flow of the hot water in the boiler water outlet pipe entering the heating water inlet pipe of the heating system and the flow of the water supply water inlet pipe of the water supply system;
step 2: the hot water entering the heating water inlet pipe flows into the heating heat exchanger, the cold water entering the heating heat exchanger through the heating water outlet pipe is heated through heat exchange, then flows to a heating user end through a heating water return pipe to supply heat for a user, and the temperature of the hot water entering the heating heat exchanger through the heating water inlet pipe is reduced and enters the heating water return pipe;
and step 3: hot water entering the water supply inlet pipe flows into the water supply heat exchanger, and the water supply heat exchanger performs heat exchange to ensure that the temperature of cold water flowing into the water supply heat exchanger from the cold water outlet pipe is increased and then flows to a hot water user side from the hot water return pipe to provide high-temperature domestic water for a user; part of hot water in the heating return pipe exchanges heat through the secondary water supply heat exchanger to enable the secondary warm water outlet pipe to supply warm water, and the warm water flows to a hot water user side through the hot water return pipe to provide domestic warm water for users;
and 4, step 4: and the cooled hot water in the heating water return pipe, the water supply water return pipe and the secondary water supply water return pipe flows back to the boiler through the boiler water return pipe to be heated again.
9. A heating method of a boiler heating system according to claim 8, wherein said step 3 user's process of obtaining domestic water supply mainly comprises the steps of:
step 301: partial hot water in the heating return pipe flows through the secondary water supply heat exchanger, and the secondary water supply heat exchanger enables warm water to be prestored in the secondary warm water outlet pipe through heat exchange;
step 302: the flow monitor monitors the water flow in the hot water return pipe, the flow monitor monitors the continuous water use of a user within 30 seconds, the secondary water supply heat exchanger continuously performs heat exchange, and the warm water prestored in the secondary warm water outlet pipe provides domestic water for the user; the flow monitor monitors that the temperature of the domestic water obtained by a user is increased after the temperature of the outlet water of the second-stage warm water outlet pipe subjected to heat exchange is increased by adjusting the first three-way regulating valve for continuously using water by the user within 1 minute so that all the hot water in the heating water return pipe enters the second-stage water supply heat exchanger through the second-stage water supply inlet pipe; the flow monitor monitors that a user continuously uses water for more than 1 minute, the second three-way regulating valve regulates to enable the high-temperature hot water part of the water outlet pipe of the boiler to flow through the water supply heat exchanger through the water supply inlet pipe, and the cold water of the cold water outlet pipe rises through the heat exchange temperature of the water supply heat exchanger and provides high-temperature domestic water for the user through the hot water return pipe.
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| CN201911293726.8A CN111089325A (en) | 2019-12-16 | 2019-12-16 | Boiler heat supply system and heat supply method thereof |
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| CN201911293726.8A CN111089325A (en) | 2019-12-16 | 2019-12-16 | Boiler heat supply system and heat supply method thereof |
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Application publication date: 20200501 |