CN209840771U - Heat exchange unit for centralized supply of domestic hot water - Google Patents
Heat exchange unit for centralized supply of domestic hot water Download PDFInfo
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- CN209840771U CN209840771U CN201920126117.2U CN201920126117U CN209840771U CN 209840771 U CN209840771 U CN 209840771U CN 201920126117 U CN201920126117 U CN 201920126117U CN 209840771 U CN209840771 U CN 209840771U
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Abstract
The utility model discloses a heat exchanger unit for supplying domestic hot water in a centralized way, which comprises a hot side circulation system and a domestic hot water circulation system; also comprises a shell-and-tube heat exchanger; the utility model has the advantages of compact structure, small occupied area, easy installation and maintenance, safe and reliable operation, energy saving, cost saving, uninterrupted supply of domestic hot water for 24 hours all day, and the like by arranging the shell-and-tube heat exchanger which adopts the wound heat exchanger; the winding type heat exchanger comprises a shell, a heat exchange tube bundle, a tube plate and a seal head; the spiral heat exchange tube bundle is spirally wound in the shell, the flow is long and is 4-6 times of that of the shell, a heat source medium stays in the spiral heat exchange tube bundle for a longer time, the heat exchange is more sufficient, and the effect is good; the inside spiral pipe that adopts just, reverse winding of shell and tube heat exchanger, clearance 1 ~ 2mm between the spiral pipe has strengthened fluidic torrent effect, and the heat transfer does not have the dead angle, makes the fluid all participate in the heat transfer process, improves heat exchange efficiency.
Description
Technical Field
The utility model relates to a heat exchanger unit technical field, especially a heat exchanger unit for centralized supply life hydrothermal.
Background
With the improvement of living standard of people, the demand of domestic hot water is increased, and the occupancy of the users for supplying domestic hot water in a centralized manner in cities is low, which greatly influences the reduction of the cost of centralized heat supply, the improvement of the competitiveness of the centralized heat supply and the improvement of the utilization rate of a heat power large network.
Generally, heat exchange equipment such as positive displacement, fast-type is adopted to life hot water system heat exchange equipment more, and this type of product heat exchange efficiency is lower, and area is big, and generally all installs in the basement, is difficult to install and overhauls.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem, a heat exchanger unit for intensively supplying domestic hot water is designed.
The technical scheme of the utility model is that the heat exchanger unit for centralized supply of domestic hot water comprises a hot side circulation system and a domestic hot water circulation system;
the heat source side inlet, the heat source side water return port, the domestic hot water side outlet and the domestic hot water side water return port are arranged on the shell-and-tube heat exchanger;
the shell-and-tube heat exchanger adopts a wound heat exchanger, the wound heat exchanger comprises a shell, a heat exchange tube bundle, tube plates and end sockets, the heat exchange tube bundle is arranged in the shell, the tube plates are welded at two ends of the heat exchange tube bundle in a sealing manner respectively, the tube plates are welded at two ends in the shell, and the end sockets are welded at two ends of the shell and arranged at the outer side of the tube plates;
the hot side circulating system comprises a temperature control system, a heat source water inlet pipeline and a heat source water return pipeline, the temperature control system is arranged on the heat source water inlet pipeline, the heat source water inlet pipeline is fixedly communicated with a heat source side inlet, and the heat source water return pipeline is fixedly communicated with a heat source side water return port;
the domestic hot water circulating system comprises a circulating water pump unit, a domestic hot water outlet pipeline, a domestic hot water return pipeline and a user water terminal, wherein the domestic hot water return pipeline is connected between the user water terminal and a domestic hot water side return port, the circulating water pump unit is fixedly communicated with the domestic hot water return pipeline, and one end of the domestic hot water return pipeline, which is far away from the user water terminal, is fixedly communicated with the domestic hot water side return port; and a domestic hot water outlet pipeline is connected between the user water terminal and the domestic hot water side outlet, and one end of the domestic hot water outlet pipeline, which is far away from the user water terminal, is fixedly communicated with the domestic hot water side outlet.
Further, heat exchanger tube bundles are spiral heat exchanger tube bundles, spiral heat exchanger tube bundles are the spiral pipe of stainless steel material and twine in turn and constitute, and be multilayer spiral pipe, the spiral opposite direction of adjacent two-layer spiral pipe, and be fixed with the distance piece between the adjacent two-layer spiral pipe.
Further, temperature control system includes the control box, the inside of control box is equipped with the PLC controller, the PLC controller is connected with the remote communication module.
Further, temperature control system still includes temperature sensor and electrical control valve, temperature sensor is fixed to be located on the life hot water outlet conduit, electrical control valve locates on the heat source inlet channel, temperature sensor's output links to each other with the input of PLC controller, the output of PLC controller links to each other with electrical control valve's input.
Further, life hot water circulating system still includes automatic level pressure moisturizing device, automatic level pressure moisturizing device includes pressure sensor, moisturizing pump and moisturizing pipeline, pressure sensor locates on the delivery port of circulating water pump unit, the delivery port of moisturizing pump is linked together with life hot water return water pipeline through moisturizing pipeline, pressure sensor's output links to each other with the input of PLC controller, the output of PLC controller links to each other with the input of moisturizing pump.
Furthermore, the domestic hot water circulation system further comprises a mixing tank, a water inlet of the mixing tank is communicated with a domestic hot water side outlet through a domestic hot water outlet pipeline, and a water outlet of the mixing tank is communicated with a water inlet of a user water using terminal through a domestic hot water outlet pipeline.
Furthermore, an electronic descaling instrument is arranged on the water replenishing pipeline, a water inlet of the electronic descaling instrument is communicated with a tap water system through the water replenishing pipeline, and a water outlet of the electronic descaling instrument is communicated with a water inlet of the water replenishing pump through the water replenishing pipeline.
Furthermore, the circulating water pump unit comprises a common circulating water pump and a standby circulating water pump, water inlets of the common circulating water pump and the standby circulating water pump are connected with a user water using terminal through a domestic hot water return pipeline, and water outlets of the common circulating water pump and the standby circulating water pump are connected with a domestic hot water side water return port of the shell-and-tube heat exchanger through a domestic hot water return pipeline.
Further, the shell-and-tube heat exchanger is made of stainless steel.
Furthermore, a two-stage overpressure protection device is arranged on the domestic hot water return pipeline and comprises an electromagnetic valve and a safety valve, and the input end of the electromagnetic valve is connected with the output end of the PLC.
Compared with the prior art, the utility model has the advantages and beneficial effects that,
1. by arranging the shell-and-tube heat exchanger which adopts the wound heat exchanger, the device has the advantages of compact structure, small occupied area, easy installation and maintenance, safe and reliable operation, energy conservation, cost conservation, uninterrupted supply of domestic hot water for 24 hours all day and the like, and greatly simplifies and accelerates the design and construction progress of domestic hot water supply engineering; the wound heat exchanger comprises a shell, heat exchange tube bundles, tube plates and end sockets, wherein the heat exchange tube bundles are arranged in the shell, the tube plates are welded at two ends of the heat exchange tube bundles in a sealing mode respectively, the tube plates are welded at two ends of the inner portion of the shell, and the end sockets are welded at two ends of the shell and arranged on the outer sides of the tube plates; the heat exchange tube bundle is a spiral heat exchange tube bundle which is formed by alternately winding spiral tubes made of stainless steel materials and is a multilayer spiral tube, the spiral directions of two adjacent layers of spiral tubes are opposite, and a distance piece is fixed between the two adjacent layers of spiral tubes; the distance piece keeps a certain distance between two adjacent layers of spiral pipes, the spiral heat exchange pipe bundle is designed in an asymmetric flow mode, the spiral winding flow of the spiral heat exchange pipe bundle in the shell is long and is 4-6 times of the shell, a heat source medium stays in the spiral heat exchange pipe bundle for a longer time, heat exchange is more sufficient, and the effect is good; the inside spiral pipe that adopts just, reverse winding of shell and tube heat exchanger, clearance 1 ~ 2mm between the spiral pipe has strengthened fluidic torrent effect, and the heat transfer does not have the dead angle, makes the fluid all participate in the heat transfer process, improves heat exchange efficiency.
2. By arranging a circulating water pump unit comprising a common circulating water pump and a standby circulating water pump, the common circulating water pump works normally, and the standby circulating water pump is standby; the common circulating water pump and the standby circulating water pump are automatically switched at regular time, when the common circulating water pump breaks down, the standby circulating water pump can be automatically put into operation, and the use of a user water terminal cannot be influenced due to the shutdown of a heat exchange unit caused by the fault of the common circulating water pump.
3. Through temperature control system including inside control box, temperature sensor and the electrical control valve that is equipped with the PLC controller for temperature intelligent control, the temperature of supplying water sets for automatically regulated temperature according to the procedure promptly.
Drawings
Fig. 1 is a schematic structural diagram of a shell-and-tube heat exchanger in a heat exchanger unit for centralized supply of domestic hot water according to the present invention;
fig. 2 is a sectional view of a shell-and-tube heat exchanger in a heat exchanger unit for centralized supply of domestic hot water according to the present invention;
fig. 3 is a schematic view of the working principle of a heat exchanger unit for centralized supply of domestic hot water according to the present invention;
fig. 4 is a schematic block diagram of the present invention for centralized domestic hot water supply.
In the figure, 1 is a shell-and-tube heat exchanger; 101 a heat source side inlet; 102 heat source side water return port; 103 domestic hot water side outlet; 104 domestic hot water side water return port; 105 a housing; 106 heat exchange tube bundles; 107 a tube sheet; 108 sealing a head; 2, a heat source water inlet pipeline; 3, a heat source water return pipeline; 4 a domestic hot water outlet pipeline; 5, a domestic hot water return pipeline; 6, a user water using terminal; 7 a common circulating water pump; 8, a standby circulating water pump; 9 a temperature sensor; 10 electric regulating valve; 11 a pressure sensor; 12, a water replenishing pump; 13 water supply pipeline; 14 a mixing tank; 15 electronic scale remover; 16 electromagnetic valves; 17 safety valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1 to 4, a heat exchanger unit for centralized supply of domestic hot water includes a hot side circulation system and a domestic hot water circulation system; the heat exchanger also comprises a shell-and-tube heat exchanger 1, wherein the shell-and-tube heat exchanger 1 is made of stainless steel; the expansion coefficient is uniform, and the deformation of the shell-and-tube heat exchanger 1 caused by unstable pressure and temperature can be avoided; the shell-and-tube heat exchanger 1 is provided with a heat source side inlet 101, a heat source side water return port 102, a domestic hot water side outlet 103 and a domestic hot water side water return port 104; flanges are connected to the ends, far away from the shell-and-tube heat exchanger 1, of the heat source side inlet 101, the heat source side water return port 102, the domestic hot water side outlet 103 and the domestic hot water side water return port 104, and sealing gaskets are arranged on the flanges; the device has small volume and light weight, is convenient to install, disassemble and clean, and reduces the cost of one-time installation and later maintenance; the heat source water inlet pipeline 2, the heat source water return pipeline 3, the domestic hot water outlet pipeline 4 and the domestic hot water return pipeline 5 can be directly connected through flanges without mounting a foundation;
the shell-and-tube heat exchanger 1 adopts a wound heat exchanger, and the wound heat exchanger has the advantages of high heat exchange efficiency, compact structure, small occupied area, easy installation and maintenance, safe and reliable operation, energy conservation, cost conservation, uninterrupted supply of domestic hot water for 24 hours all day and the like, thereby greatly simplifying and accelerating the design and construction progress of domestic hot water supply engineering; the technical problems that the existing product is low in heat exchange efficiency, large in occupied area, and not easy to install and maintain as the existing product is generally installed in a basement are solved; the wound heat exchanger comprises a shell 105, a heat exchange tube bundle 106, tube plates 107 and end sockets 108, wherein the heat exchange tube bundle 106 is arranged inside the shell 105, the tube plates 107 are welded at two ends of the heat exchange tube bundle 106 in a sealing manner, the tube plates 107 are welded at two ends inside the shell 105, and the end sockets 108 are welded at two ends of the shell 105 and arranged outside the tube plates 107; the heat exchange tube bundle 106 is a spiral heat exchange tube bundle, the spiral heat exchange tube bundle is formed by alternately winding spiral tubes made of stainless steel and is a multilayer spiral tube, the spiral directions of two adjacent layers of spiral tubes are opposite, a distance piece is fixed between the two adjacent layers of spiral tubes, the distance piece enables a certain distance to be kept between the two adjacent layers of spiral tubes, the spiral heat exchange tube bundle is in an asymmetric flow design, fluid flows in a strong turbulent flow state, heat transfer is enhanced, and heat exchange coefficients are greatly improved; meanwhile, the spiral heat exchange tube bundle can effectively eliminate the pipeline vibration and the stress generated by the deformation caused by expansion with heat and contraction with cold; the spiral heat exchange tube bundle is spirally wound in the shell, the flow is long and is 4-6 times of that of the shell, a heat source medium stays in the spiral heat exchange tube bundle for a longer time, the heat exchange is more sufficient, and the effect is good; the inside spiral pipe that adopts just, reverse winding of shell and tube heat exchanger, clearance 1 ~ 2mm between the spiral pipe has strengthened fluidic torrent effect, and the heat transfer does not have the dead angle, makes the fluid all participate in the heat transfer process, improves heat exchange efficiency.
The hot side circulating system comprises a temperature control system, a heat source water inlet pipeline 2 and a heat source water return pipeline 3, the temperature control system is arranged on the heat source water inlet pipeline 2, the heat source water inlet pipeline 2 is fixedly communicated with a heat source side inlet 101, and the heat source water return pipeline 3 is fixedly communicated with a heat source side water return port 102; the temperature control system comprises a control box, a PLC (programmable logic controller) is arranged in the control box, and the PLC is connected with a remote communication module; the temperature control system further comprises a temperature sensor 9 and an electric regulating valve 10, wherein the temperature sensor 9 is fixedly arranged on the domestic hot water outlet pipeline 4, the electric regulating valve 10 is arranged on the heat source water inlet pipeline 2, the output end of the temperature sensor 9 is connected with the input end of a PLC (programmable logic controller), and the output end of the PLC is connected with the input end of the electric regulating valve 10; the temperature control system enables the water temperature to be intelligently controlled, namely the water supply temperature is automatically adjusted according to the program setting;
the domestic hot water circulating system comprises a circulating water pump unit, a domestic hot water outlet pipeline 4, a domestic hot water return pipeline 5 and a user water using terminal 6, wherein the domestic hot water return pipeline 5 is connected between the user water using terminal 6 and a domestic hot water side return port 104, the circulating water pump unit is fixedly communicated with the domestic hot water return pipeline 5, and one end, far away from the user water using terminal 6, of the domestic hot water return pipeline 5 is fixedly communicated with the domestic hot water side return port 104; a domestic hot water outlet pipeline 4 is connected between the user water terminal 6 and the domestic hot water side outlet 103, and one end of the domestic hot water outlet pipeline 4, which is far away from the user water terminal 6, is fixedly communicated with the domestic hot water side outlet 103; the circulating water pump unit comprises a common circulating water pump 7 and a standby circulating water pump 8, water inlets of the common circulating water pump 7 and the standby circulating water pump 8 are connected with a user water terminal 6 through a domestic hot water return pipeline 5, and water outlets of the common circulating water pump 7 and the standby circulating water pump 8 are connected with a domestic hot water side water return port 104 of the shell-and-tube heat exchanger 1 through the domestic hot water return pipeline 5; normally, the common circulating water pump 7 works, and the standby circulating water pump 8 is standby; the common circulating water pump 7 and the standby circulating water pump 8 are automatically switched at regular time, when the common circulating water pump 7 breaks down, the standby circulating water pump 8 can be automatically put into operation, and the use of the user water using terminal 6 cannot be influenced by the shutdown of the heat exchange unit caused by the failure of the common circulating water pump 7;
the domestic hot water circulating system further comprises an automatic constant-pressure water supplementing device, the automatic constant-pressure water supplementing device comprises a pressure sensor 11, a water supplementing pump 12 and a water supplementing pipeline 13, the pressure sensor 11 is arranged on a water outlet of the circulating water pump unit, the water outlet of the water supplementing pump 12 is communicated with the domestic hot water return pipeline 5 through the water supplementing pipeline 13, the output end of the pressure sensor 11 is connected with the input end of the PLC, and the output end of the PLC is connected with the input end of the water supplementing pump 12; the PLC controller can automatically control the water replenishing pump 12 to be started by utilizing the data of the pressure sensor 11, so that the domestic hot water circulating system keeps constant pressure; an electronic descaling instrument 15 is arranged on the water replenishing pipeline 13, the water inlet of the electronic descaling instrument 15 is communicated with a tap water system through the water replenishing pipeline 13, and the water outlet of the electronic descaling instrument 15 is communicated with the water inlet of the water replenishing pump 12 through the water replenishing pipeline 13. The water normally consumed by the heat exchanger unit comes from a tap water system of a user or the make-up water of a variable-frequency pressurization system, and the water of the two systems is raw water which is not softened, so that an electronic scale remover 15 is arranged at the inlet of the make-up water, and the formation of scale in the shell-and-tube heat exchanger 1 is further prevented; the domestic hot water circulating system further comprises a mixing tank 14, a water inlet of the mixing tank 14 is communicated with a domestic hot water side outlet 13 through a domestic hot water outlet pipeline 4, and a water outlet of the mixing tank 14 is communicated with a water inlet of a user water terminal 6 through the domestic hot water outlet pipeline 4; a two-stage overpressure protection device is arranged on the domestic hot water return pipeline 5 and comprises an electromagnetic valve 16 and a safety valve 17, and the input end of the electromagnetic valve 16 is connected with the output end of the PLC; when the domestic hot water circulation system has overpressure, the electromagnetic valve 16 is firstly opened by the PLC controller for pressure relief, and if the electromagnetic valve 16 has a fault, the safety valve 17 is opened for pressure relief so as to ensure the stability of the system pressure and the safety of operation.
The heat source water inlet pipeline 2, the heat source water return pipeline 3, the domestic hot water outlet pipeline 4 and the domestic hot water return pipeline 5 are all provided with a shut-off valve and a blow-down valve, and the blow-down valves are respectively arranged at the lowest positions of the heat source water inlet pipeline 2, the heat source water return pipeline 3, the domestic hot water outlet pipeline 4 and the domestic hot water return pipeline 5, so that blow-down of all pipelines is facilitated.
The working principle is as follows:
the hot side circulating system comprises a temperature control system, a heat source water inlet pipeline 2 and a heat source water return pipeline 3, and forms a loop with a primary network or a boiler; the domestic hot water circulating system comprises a circulating water pump unit, a domestic hot water outlet pipeline 4, a domestic hot water return pipeline 5 and a user water terminal 6, and forms a loop with the user water terminal; the hot side circulation system and the domestic hot water circulation system exchange heat through the shell-and-tube heat exchanger 1, heat of the hot side circulation system is transferred to domestic hot water, and a user can use the hot water by opening the water using terminal 6.
The shell-and-tube heat exchanger 1 is used for automatically and continuously converting heat obtained from a primary network into domestic hot water required by a user. Namely, hot water or steam from a heat source enters the shell-and-tube heat exchanger 1 from a heat source side inlet 101 of the shell-and-tube heat exchanger 1 for heat exchange, and then flows out from a heat source side water return port 102 of the shell-and-tube heat exchanger 1;
a circulating water pump unit is arranged between the domestic hot water side water return port 104 and the user water consumption terminal 6, and mainly ensures that a domestic hot water circulating system can still circulate at a fixed low flow speed in a water-free state, the surface of a heat exchange tube bundle 106 in the shell-and-tube heat exchanger 1 and the inner wall of the shell 105 are continuously flushed, the formation of scale is prevented, and domestic hot water is ensured to flow out in time according to the temperature required by the design of a PLC (programmable logic controller); the circulating water pump unit comprises a common circulating water pump 7 and a standby circulating water pump 8; normally, the common circulating water pump 7 works, and the standby circulating water pump 8 is standby; the common circulating water pump 7 and the standby circulating water pump 8 are automatically switched at regular time, when the common circulating water pump 7 breaks down, the standby circulating water pump 8 can be automatically put into operation, and the use of the user water using terminal 6 cannot be influenced by the shutdown of the heat exchange unit caused by the failure of the common circulating water pump 7;
after the dirt of the make-up water from a user's tap water system or a variable-frequency pressurization system is removed by the electronic scale removal 15, the formation of the scale in the shell-and-tube heat exchanger 1 can be further prevented, and then the make-up water is pumped into the domestic hot water side water return port 104 by the water make-up pump 12 through the water make-up pipe 13, and then the heat exchange is carried out by the shell-and-tube heat exchanger 1, so that hot water with different temperatures for bathing, domestic hot water and the like is produced, and the requirements of.
The domestic hot water circulating system also comprises an automatic constant-pressure water supplementing device, the automatic constant-pressure water supplementing device comprises a pressure sensor 11, a water supplementing pump 12 and a water supplementing pipeline 13, the pressure sensor 11 is arranged on a water outlet of the circulating water pump unit and used for measuring the pressure of the domestic hot water return pipeline 5 at the water outlet of the circulating water pump unit and transmitting pressure data to the PLC, the water supplementing pump 12 receives a control signal of the PLC to complete water supplementing operation, and when the pressure data of the pressure sensor 11 is in a normal value, the PLC controls the water supplementing pump 12 to stop running so as to stop supplying water into the shell-and-tube heat exchanger 1, so that the domestic hot water circulating system keeps constant pressure;
the hot side circulating system comprises a temperature control system, a heat source water inlet pipeline 2 and a heat source water return pipeline 3, the temperature control system comprises a control box, a PLC (programmable logic controller) is arranged in the control box, the temperature control system also comprises a temperature sensor 9 and an electric regulating valve 10, the temperature sensor 9 is fixedly arranged on a domestic hot water outlet pipeline 4 and is used for measuring the temperature of the domestic hot water outlet pipeline 4, the electric regulating valve 10 is arranged on the heat source water inlet pipeline 2, when the temperature measured by the temperature sensor 9 is higher or lower than the temperature preset by a user through the PLC, the opening of the electric regulating valve 10 is controlled by the PLC, the flow of a heat source is further controlled, the temperature of the domestic hot water side outlet 103 is further controlled, and the water temperature in the domestic hot water outlet pipeline 4 is kept at; the temperature control system enables the water temperature to be intelligently controlled, namely the water supply temperature is automatically adjusted according to the program setting;
the domestic hot water consumption is a variable which is continuously changed along with the increase or decrease of the water consumption of people and cannot be accurately controlled, and is generally realized by adjusting the opening degree of an electric adjusting valve 10 on a heat source water inlet pipeline 2, but the opening degree adjustment of the electric adjusting valve 10 needs certain operation time, and the change of the heat source side flow in the process causes the change of a heat source in a shell-and-tube heat exchanger 1, so that the discomfort that the change of the domestic water supply temperature affects the water consumption of a hot user is changed; in order to avoid the discomfort that the change of the domestic water supply temperature affects the water use of hot users, a mixing tank 14 is arranged on the domestic hot water outlet pipeline 4 between the domestic hot water side outlet 13 and the user water use terminal 6, so that the water with higher temperature coming out of the shell-and-tube heat exchanger 1 and the water with lower temperature in the mixing tank 14 are uniformly mixed and then are sent to the domestic hot water outlet pipeline 5, the great fluctuation of the water supply temperature is avoided, and the relative stability of the water temperature is ensured.
A two-stage overpressure protection device is arranged on the domestic hot water return pipeline 5 and comprises an electromagnetic valve 16 and a safety valve 17, and the input end of the electromagnetic valve 16 is connected with the output end of the PLC; when the domestic hot water circulation system has overpressure, the electromagnetic valve 16 is firstly opened by the PLC controller for pressure relief, and if the electromagnetic valve 16 has a fault, the safety valve 17 is opened for pressure relief so as to ensure the stability of the system pressure and the safety of operation.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A heat exchange unit for supplying domestic hot water in a centralized way comprises a hot side circulation system and a domestic hot water circulation system; it is characterized in that the preparation method is characterized in that,
the heat source side inlet, the heat source side water return port, the domestic hot water side outlet and the domestic hot water side water return port are arranged on the shell-and-tube heat exchanger;
the shell-and-tube heat exchanger adopts a wound heat exchanger, the wound heat exchanger comprises a shell, a heat exchange tube bundle, tube plates and end sockets, the heat exchange tube bundle is arranged in the shell, the tube plates are welded at two ends of the heat exchange tube bundle in a sealing manner respectively, the tube plates are welded at two ends in the shell, and the end sockets are welded at two ends of the shell and arranged at the outer side of the tube plates;
the hot side circulating system comprises a temperature control system, a heat source water inlet pipeline and a heat source water return pipeline, the temperature control system is arranged on the heat source water inlet pipeline, the heat source water inlet pipeline is fixedly communicated with a heat source side inlet, and the heat source water return pipeline is fixedly communicated with a heat source side water return port;
the domestic hot water circulating system comprises a circulating water pump unit, a domestic hot water outlet pipeline, a domestic hot water return pipeline and a user water terminal, wherein the domestic hot water return pipeline is connected between the user water terminal and a domestic hot water side return port, the circulating water pump unit is fixedly communicated with the domestic hot water return pipeline, and one end of the domestic hot water return pipeline, which is far away from the user water terminal, is fixedly communicated with the domestic hot water side return port; and a domestic hot water outlet pipeline is connected between the user water terminal and the domestic hot water side outlet, and one end of the domestic hot water outlet pipeline, which is far away from the user water terminal, is fixedly communicated with the domestic hot water side outlet.
2. The heat exchanger unit for concentrated domestic hot water supply according to claim 1, wherein the heat exchanger bundle is a spiral heat exchanger bundle, the spiral heat exchanger bundle is formed by alternately winding spiral pipes made of stainless steel, the spiral pipes are multiple layers of spiral pipes, the spiral directions of two adjacent layers of spiral pipes are opposite, and a distance piece is fixed between the two adjacent layers of spiral pipes.
3. The heat exchange unit for the centralized supply of domestic hot water according to claim 1, wherein the temperature control system comprises a control box, a PLC is arranged in the control box, and the PLC is connected with a remote communication module.
4. The heat exchanger unit for the centralized supply of domestic hot water according to claim 1 or 3, wherein the temperature control system further comprises a temperature sensor and an electric control valve, the temperature sensor is fixedly arranged on a domestic hot water outlet pipeline, the electric control valve is arranged on a heat source water inlet pipeline, an output end of the temperature sensor is connected with an input end of the PLC, and an output end of the PLC is connected with an input end of the electric control valve.
5. The heat exchanger unit for centralized supply of domestic hot water according to claim 1 or 3, wherein the domestic hot water circulating system further comprises an automatic constant pressure water replenishing device, the automatic constant pressure water replenishing device comprises a pressure sensor, a water replenishing pump and a water replenishing pipeline, the pressure sensor is arranged on a water outlet of the circulating water pump unit, the water outlet of the water replenishing pump is communicated with the domestic hot water returning pipeline through the water replenishing pipeline, an output end of the pressure sensor is connected with an input end of the PLC controller, and an output end of the PLC controller is connected with an input end of the water replenishing pump.
6. The heat exchanger unit for the centralized supply of domestic hot water according to claim 5, wherein the domestic hot water circulation system further comprises a mixing tank, the water inlet of the mixing tank is communicated with the domestic hot water side outlet through a domestic hot water outlet pipe, and the water outlet of the mixing tank is communicated with the water inlet of the user water terminal through a domestic hot water outlet pipe.
7. The heat exchanger unit according to claim 5, wherein the water supply pipe is provided with an electronic scale remover, the water inlet of the electronic scale remover is connected with the tap water system through the water supply pipe, and the water outlet of the electronic scale remover is connected with the water inlet of the water supply pump through the water supply pipe.
8. The heat exchange unit for centralized supply of domestic hot water according to claim 1, wherein the circulating water pump unit comprises a common circulating water pump and a standby circulating water pump, water inlets of the common circulating water pump and the standby circulating water pump are connected with a user water terminal through a domestic hot water return pipe, and water outlets of the common circulating water pump and the standby circulating water pump are connected with a domestic hot water side water return port of the shell-and-tube heat exchanger through a domestic hot water return pipe.
9. The heat exchanger unit for the concentrated supply of domestic hot water according to claim 1, wherein the shell-and-tube heat exchanger is made of stainless steel.
10. The heat exchanger unit for the centralized supply of domestic hot water according to claim 1 or 3, wherein the domestic hot water return pipe is provided with a two-stage overpressure protection device, the two-stage overpressure protection device comprises a solenoid valve and a safety valve, and an input end of the solenoid valve is connected with an output end of the PLC controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920126117.2U CN209840771U (en) | 2019-01-24 | 2019-01-24 | Heat exchange unit for centralized supply of domestic hot water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920126117.2U CN209840771U (en) | 2019-01-24 | 2019-01-24 | Heat exchange unit for centralized supply of domestic hot water |
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| CN209840771U true CN209840771U (en) | 2019-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920126117.2U Expired - Fee Related CN209840771U (en) | 2019-01-24 | 2019-01-24 | Heat exchange unit for centralized supply of domestic hot water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115789754A (en) * | 2023-02-06 | 2023-03-14 | 浙江省三建建设集团有限公司 | Building heating system and method with bacteria and virus killing function |
-
2019
- 2019-01-24 CN CN201920126117.2U patent/CN209840771U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115789754A (en) * | 2023-02-06 | 2023-03-14 | 浙江省三建建设集团有限公司 | Building heating system and method with bacteria and virus killing function |
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Granted publication date: 20191224 Termination date: 20220124 |