Overheated steam internal and external circulation supply double system domestic water heater unit

Abstract

The utility model discloses a kind of overheated steam inside and outside circulation supply double system domestic hot water unit, including steam efficient temperature-reducing pressure-reducing device, instant semi-volume heat exchanger, pressure tank, internal circulation pump system, external circulation pump system, water replenishment pump system and intelligent control cabinet. Overheated steam becomes saturated steam into heat exchanger after temperature-reducing pressure-reducing, and carries out heat exchange with softened water;Condensate is recycled to softened water tank by drain valve and is recycled. Internal circulation system keeps water temperature constant by pressure tank, external circulation system supplies hot water as needed, and water replenishment pump system continuously replenishes softened water. The utility model effectively solves the problem of low heat exchange efficiency, high energy consumption and poor stability of traditional system, realizes direct efficient use of overheated steam, constant temperature and pressure water supply and system intelligent control, and is suitable for domestic hot water, food processing, heating and other various scenes, with the advantages of energy saving, reliable operation and high integration.

Description

Technical Field

[0001] This utility model relates to the field of domestic hot water supply technology, specifically a domestic hot water unit with a dual system of superheated steam internal and external circulation replenishment. Background Technology

[0002] Currently, centralized domestic hot water systems mostly use plate or shell-and-tube heat exchangers for heat exchange, which suffers from problems such as low heat exchange efficiency, large equipment footprint, and high operating costs. Especially when the heat source is superheated steam, it usually needs to go through multiple stages of heat exchange before it can be used, resulting in significant energy loss and system complexity.

[0003] This utility model aims to solve the above problems and provides a high-efficiency domestic hot water unit that integrates de-temperature and pressure reduction, instant heat exchange, and dual-circulation replenishment. It can directly utilize superheated steam to achieve efficient energy utilization and stable system operation. Utility Model Content

[0004] The purpose of this invention is to provide a domestic hot water unit with a dual system of superheated steam internal and external circulation replenishment. Through integrated and modular design, it achieves direct and efficient utilization of superheated steam, meeting the needs of various hot water usage scenarios.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dual-system domestic hot water unit with internal and external superheated steam circulation, comprising a high-efficiency steam desuperheating and pressure reduction device and an intelligent control cabinet. The inlet end of the high-efficiency steam desuperheating and pressure reduction device is equipped with a first pressure sensor, a first temperature sensor, a first shut-off valve, a first Y-type filter, and a first electric regulating valve for detecting and controlling the inlet parameters of the superheated steam. The outlet end of the high-efficiency steam desuperheating and pressure reduction device is connected to the hot-side inlet of an instantaneous semi-volumetric heat exchanger, and a second pressure sensor and a second temperature sensor are provided at the hot-side inlet. The hot-side outlet of the instantaneous semi-volumetric heat exchanger is connected to a softened water tank through a first drain valve and a second shut-off valve for recovering condensate. The cold-side outlet of the instantaneous semi-volumetric heat exchanger is connected to a pressure stabilizing tank via a first butterfly valve. The pressure stabilizing tank is equipped with a water bath distributor. The outlet of the pressure stabilizing tank is connected to an external circulation pump system P-102 via a third pressure sensor, a third temperature sensor, and a second butterfly valve to supply domestic hot water. The pressure stabilizing tank is also connected to the cold-side inlet of the instantaneous semi-volumetric heat exchanger via an internal circulation pump system P-101 to form a closed internal circulation loop. The softened water tank is connected to the internal circulation loop via a water replenishment pump system P-103 to replenish the system with softened water. The high-efficiency steam desuperheating and pressure reducing device is also connected to a condensate replenishment pump system P-104 to provide condensate to the high-efficiency steam desuperheating and pressure reducing device to form saturated steam.

[0006] Preferably, the condensate replenishment pump system P-104 is equipped with a third butterfly valve at the inlet and a first check valve and a second electric regulating valve at the outlet to control the replenishment amount and pressure of condensate.

[0007] Preferably, the softened water tank is equipped with a magnetic level gauge, an inlet solenoid valve, and an outlet valve for automatically controlling the water level and draining the water.

[0008] Preferably, the inlet of the internal circulation pump system P-101 is equipped with a fourth butterfly valve and the outlet is equipped with a second check valve to maintain the pressure and flow rate stability of the internal circulation system.

[0009] Preferably, the external circulation pump system P-102 is equipped with a fifth butterfly valve at the inlet and a third check valve and a sixth butterfly valve at the outlet, for controlling the output pressure and temperature of domestic hot water.

[0010] Preferably, the system also includes an intelligent control cabinet, which is electrically connected to various sensors, electric valves and pump systems to realize automatic control and unattended operation of the system.

[0011] The beneficial effects of this utility model are as follows: (1) This utility model converts industrial superheated steam into saturated steam through a high-efficiency steam de-heating and de-pressure device, making full use of the latent heat of steam and significantly improving the heat exchange efficiency; at the same time, the condensate after heat exchange is returned to the softened water tank through the condensate recovery system, realizing multiple recycling of heat energy and water resources, effectively reducing operating costs and energy waste.

[0012] (2) This utility model achieves constant pressure and temperature storage and circulating heat preservation of domestic hot water through a closed loop formed by an internal circulation pump system and a pressure stabilizing tank; the external circulation pump system outputs hot water stably according to user needs and can be adapted to various application scenarios; the water replenishment pump system works in conjunction with the water softening device to continuously replenish the system with softened water, ensuring that the water quality meets the standards and the pressure is stable, thus meeting the user's high requirements for the stability of hot water supply and the quality of water use.

[0013] (3) This utility model integrates functions such as de-temperature and de-pressure, heat exchange, circulation replenishment, voltage stabilization and energy storage and intelligent control into the skid structure, which greatly reduces the equipment footprint and installation cost; the intelligent control cabinet realizes the fully automatic unattended operation of the system through multi-sensor data acquisition and automatic adjustment, and has remote monitoring, fault diagnosis and energy efficiency optimization functions, which improves equipment management efficiency and operational reliability, and is suitable for various industrial and civil hot water application scenarios. Attached Figure Description

[0014] Figure 1 This is a system schematic diagram of the present invention.

[0015] In the diagram: 1-First pressure sensor; 2-First temperature sensor; 3-First shut-off valve; 4-First Y-type filter; 5-First electric regulating valve; 6-High-efficiency steam desuperheating and pressure reducing device; 7-Safety valve; 8-Second pressure sensor; 9-Second temperature sensor; 10-Third shut-off valve; 11-Remote water meter; 12-Solenoid valve; 13-Third butterfly valve; 14-Condensate supply pump P-104; 15-First check valve; 16-Second electric regulating valve; 17-Water tank vent; 18-Brine tank; 19-Water softener; 20-Softened water tank; 21-Magnetic level gauge; 22-Second shut-off valve; 23-First condensate drain. Valves; 24-Fourth butterfly valve; 25-Make-up water pump P-103; 26-Second check valve; 27-Instantaneous semi-volumetric heat exchanger; 28-First butterfly valve; 29-Fourth pressure sensor; 30-Fourth temperature sensor; 31-Fifth butterfly valve; 32-Safety valve; 33-Pressure stabilizing tank; 34-Third pressure sensor; 35-Third temperature sensor; 36-Second butterfly valve; 37-Water bath distributor; 38-Sixth butterfly valve; 39-Internal circulation pump P-101; 40-Third check valve; 41-Seventh butterfly valve; 42-Fourth check valve; 43-External circulation pump P-102; 44-Eighth butterfly valve; 45-Intelligent control cabinet. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings.

[0017] like Figure 1 As shown, the present invention provides a dual-system domestic hot water unit with internal and external superheated steam circulation, the specific implementation of which is as follows: When the system starts running, the water softening process is initiated first. Tap water is metered by the remote water meter 11 and then enters the fully automatic water softener 19. The water softener 19 softens the water using brine in the salt storage tank 18. The softened water is stored in the softened water tank 20, and the water level is monitored in real time by the magnetic level gauge 21. When the water level is lower than the set value, the inlet solenoid valve 12 automatically opens to replenish water, and automatically closes when the water level reaches the high level. The drain valve 17 is used to empty the water tank during maintenance.

[0018] Superheated steam enters the system from the main steam pipeline, flowing sequentially through the first pressure sensor 1 and the first temperature sensor 2 to detect the initial pressure and temperature of the steam. The steam then passes through the first shut-off valve 3 and the first Y-type filter 4 to remove any impurities. The flow rate is then regulated by the first electric regulating valve 5 before entering the high-efficiency steam desuperheating and pressure-reducing device 6. In the high-efficiency steam desuperheating and pressure-reducing device 6, condensate from the condensate supply pump P-104 14 is injected through the third butterfly valve 13 and the first check valve 15. The second electric regulating valve 16 precisely controls the injection volume, reducing the superheated steam to saturated steam. The safety valve 7 trips to protect the equipment in case of overpressure.

[0019] Saturated steam enters the hot-side inlet of the instantaneous semi-volumetric heat exchanger 27 from the outlet of the high-efficiency steam desuperheating and pressure reducing device 6. A second pressure sensor 8 and a second temperature sensor 9 are installed at the inlet to monitor steam parameters. Inside the heat exchanger, the saturated steam releases latent heat to heat domestic water, and the resulting condensate is discharged to the softened water tank 20 for recycling through the first drain valve 23 and the second shut-off valve 22.

[0020] A closed-loop circulation system is formed on the domestic water side. Softened water is pumped from the softened water tank 20 by the makeup water pump P-103 25, and enters the internal circulation system through the fourth butterfly valve 24 and the second check valve 26. The internal circulation water is heated on the cold side of the instantaneous semi-volumetric heat exchanger 27, and then enters the pressure stabilizing tank 33 through the first butterfly valve 28. The water bath distributor 37 installed in the pressure stabilizing tank 33 ensures that the water temperature is uniform and stable. The internal circulation pump P-101 39 pumps the hot water in the pressure stabilizing tank back to the cold side inlet of the heat exchanger through the sixth butterfly valve 38 and the third check valve 40, forming a closed loop. The third pressure sensor 29 and the third temperature sensor 30 monitor the circulating water parameters in real time, and adjust the frequency of the internal circulation pump through the intelligent control cabinet 45 to maintain the system's constant pressure and temperature operation.

[0021] Domestic hot water supply is achieved through an external circulation system. When a user requires hot water, the external circulation pump P-102 43 starts, pumping hot water from the pressure tank 33 through the third pressure sensor 34, the third temperature sensor 35, and the second butterfly valve 36. The outlet pipe is equipped with a seventh butterfly valve 41, a fourth check valve 42, and an eighth butterfly valve 44 to regulate flow and prevent backflow. Hot water can be directly delivered to various water points, such as showers, kitchens, or heating systems.

[0022] The intelligent control cabinet 45 serves as the control center of the entire system. It receives signals from all sensors, including pressure, temperature, and liquid level signals from various points. Through preset programs, it automatically controls the opening degree of each electric valve, the start and stop of the pump, and its frequency, achieving fully automatic unattended operation. The control cabinet can also be set with functions such as timed operation, temperature setting, and fault alarm to ensure efficient, safe, and stable operation of the system.

[0023] Through the above-described embodiments, this invention achieves efficient utilization of superheated steam, stable supply of domestic hot water, energy-saving and environmentally friendly system operation, and is suitable for various hot water usage scenarios.

[0024] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, based on the technical teachings provided by this utility model and as common knowledge in the mechanical field, other equivalent modifications and improvements can be made, and these should also be considered within the scope of protection of this utility model.

Claims

1. A domestic hot water unit with a dual system of superheated steam internal and external circulation replenishment, characterized in that: it includes a high-efficiency steam de-heating and pressure reducing device (6) and an intelligent control cabinet (45), wherein the inlet end of the high-efficiency steam de-heating and pressure reducing device (6) is provided with a first pressure sensor (1), a first temperature sensor (2), a first shut-off valve (3), a first Y-type filter (4) and a first electric regulating valve (5) for detecting and controlling the inlet parameters of superheated steam; The outlet end of the steam high-efficiency de-heating and pressure reducing device (6) is connected to the hot side inlet of the instantaneous semi-volume heat exchanger (27), and a second pressure sensor (8) and a second temperature sensor (9) are provided at the hot side inlet. The hot-side outlet of the instantaneous semi-volume heat exchanger (27) is connected to the softened water tank (20) via a first drain valve (23) and a second shut-off valve (22) for the purpose of recovering condensate. The cold side outlet of the instantaneous semi-volume heat exchanger (27) is connected to the pressure tank (33) through the first butterfly valve (28), and the pressure tank (33) is equipped with a water bath distributor (37). The outlet of the pressure stabilizing tank (33) is connected to the external circulation pump system P-102 (43) through the third pressure sensor (34), the third temperature sensor (35), and the second butterfly valve (36) for supplying domestic hot water to the outside. The pressure stabilizing tank (33) is also connected to the cold side inlet of the instantaneous semi-volume heat exchanger (27) through the internal circulation pump system P-101 (39) to form a closed internal circulation loop; The softened water tank (20) is connected to the internal circulation loop through the water replenishment pump system P-103 (25) to replenish the system with softened water; The high-efficiency steam desuperheating and pressure reducing device (6) is also connected to a condensate supply pump system P-104 (14) for supplying condensate to the high-efficiency steam desuperheating and pressure reducing device (6) to form saturated steam.

2. The domestic hot water unit with a dual system of superheated steam internal and external circulation replenishment as described in claim 1, characterized in that: The condensate supply pump system P-104 (14) has a third butterfly valve (13) at the inlet and a first check valve (15) and a second electric regulating valve (16) at the outlet to control the amount and pressure of condensate supply.

3. A domestic hot water unit with a dual system of superheated steam internal and external circulation replenishment as described in claim 1 or 2, characterized in that: The softened water tank (20) is equipped with a magnetic level gauge (21), an inlet solenoid valve (12), and an outlet valve (17) for automatically controlling the water level and draining the water.

4. A domestic hot water unit with a dual system of superheated steam internal and external circulation replenishment as described in claim 3, characterized in that: The internal circulation pump system P-101 (39) is equipped with a fourth butterfly valve (38) at the inlet and a second check valve (40) at the outlet to maintain the pressure and flow stability of the internal circulation system.

5. A domestic hot water unit with a dual system of superheated steam internal and external circulation replenishment as described in claim 4, characterized in that: The external circulation pump system P-102 (43) is equipped with a fifth butterfly valve (41) at the inlet and a third check valve (42) and a sixth butterfly valve (44) at the outlet, which are used to control the output pressure and temperature of domestic hot water.

6. A domestic hot water unit with a dual system of superheated steam internal and external circulation replenishment as described in claim 5, characterized in that: It also includes an intelligent control cabinet (45), which is electrically connected to various sensors, electric valves and pump systems to realize automatic control and unattended operation of the system.

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