Desalted water system with heating device

Abstract

The utility model discloses a demineralized water system with a heating device, which comprises a boiler row, a water outlet end of the boiler row is connected with a water inlet end of a heat exchanger which exchanges heat with a raw water tank through a pipeline, a water outlet end of the heat exchanger is connected with a cooling pool through a pipeline, and a water outlet end of the raw water tank is connected with a water production system through a pipeline. A branch is led out of a main pipe of the boiler row, a control valve and a flow monitoring device which are used for connecting and disconnecting the branch are arranged on the branch, and the branch is connected with a heat exchanger. Temperature sensors are respectively arranged at inlets and outlets of the boiler row and the raw water tank. According to the utility model, waste heat of boiler continuous drainage water is utilized, the water inlet temperature of the demineralized water system is automatically increased, and the water permeability is enhanced, so that the water production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a desalted water system with heating device belongs to boiler technical field. BACKGROUND

[0002] The current desalted water system is as follows: raw water→raw water tank→raw water pump→disc filter→hollow fiber ultrafiltration→ultrafiltration water tank→first reverse osmosis lifting pump→first security filter→first RO high pressure pump→first RO device→first reverse osmosis water tank→second reverse osmosis lifting water pump→second security filter→second high pressure pump→second RO device→second reverse osmosis water tank→EDI water pump→EDI security filter→254nm UV sterilization device→EDI device→desalted water tank→desalted water pump. However, the above-mentioned desalted water system does not have a heating device, and seasonal changes will cause fluctuations in the water temperature of the desalted water system, affecting the water production efficiency. SUMMARY

[0003] The technical problem to be solved by the utility model is how to set a heating device in the desalted water system to avoid fluctuations in the water temperature of the desalted water system caused by seasonal changes.

[0004] In order to solve the above technical problem, the technical scheme of the utility model provides a desalted water system with a heating device, characterized in that it comprises a boiler continuous row, the water outlet end of the boiler continuous row is connected through a pipeline to the water inlet end of a heat exchanger that exchanges heat with a raw water tank, the water outlet end of the heat exchanger is connected through a pipeline to a cooling pool, and the water outlet end of the raw water tank is connected through a pipeline to a water production system; a branch is led out from the main pipe of the boiler continuous row, a control valve that controls the branch and a flow monitoring device are arranged on the branch, and the branch is connected to the heat exchanger; temperature sensors are arranged at the inlet and outlet positions of the boiler continuous row and the raw water tank; the control valve is connected to a control module, the temperature of the raw water in the raw water tank is detected according to the temperature sensors, the control module automatically adjusts the opening degree of the control valve to control the flow of the water outlet of the boiler continuous row, so that the temperature of the raw water reaches the target temperature that the raw water needs to reach.

[0005] Preferably, the heat exchanger is a coiled pipe, and the coiled pipe is arranged in the raw water tank; the water outlet end of the coiled pipe is connected through a pipeline to the cooling pool.

[0006] Preferably, the raw water tank is provided with a disturbance device.

[0007] Preferably, the heat exchanger is a plate heat exchanger, which is arranged outside the raw water tank, the first water inlet end of the plate heat exchanger is connected with the water outlet end of the boiler through a pipeline, the first water outlet end of the plate heat exchanger is connected with the cooling pool through a pipeline, the second water inlet end of the plate heat exchanger is connected with the water inlet end of the raw water tank through a pipeline, and the second water outlet end of the plate heat exchanger is connected with the water outlet end of the raw water tank through a pipeline.

[0008] Preferably, the second water inlet end of the plate heat exchanger is connected with a circulating pump.

[0009] Preferably, the inlet and outlet of the circulating pump are connected with a pipeline provided with another circulating pump in parallel, and a valve is arranged on the pipeline of each circulating pump.

[0010] Preferably, a pressure sensor is arranged in each pipeline.

[0011] The present application utilizes the waste heat of the boiler to automatically increase the water inlet temperature of the desalted water system, to enhance the water permeability, and to improve the water production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 Fig. 1 is a schematic view of a desalted water system with a heating device (1);

[0013] Figure 2 Fig. 2 is a schematic view of a desalted water system with a heating device (2). DETAILED DESCRIPTION

[0014] In order to make the present application more apparent, the preferred embodiments are described in detail below with reference to the drawings.

[0015] Embodiment 1

[0016] The present application provides a desalted water system with a heating device, as shown in Fig. Figure 1 The present application provides a desalted water system with a heating device, as shown in Fig.

[0017] The working principle of the present application is as follows:

[0018] 1. A branch is led out from the main pipe of the steam drum (i.e. the boiler 1), and a control valve and a flow monitoring device are installed on the branch.

[0019] 2. The drain water is introduced into the serpentine pipe 7 of the raw water tank 2 for heat exchange;

[0020] 3. The inlet and outlet temperatures of boiler blowdown 1 and raw water tank 2 are monitored in real time using temperature sensors;

[0021] 4. Based on the target temperature required for the raw water, the control system automatically adjusts the opening of the control valves to control the flow rate of the water discharged from boiler continuous blowdown 1, thereby regulating the heating degree of the raw water;

[0022] 5. Directly enter the water production system 6 to begin water production;

[0023] 6. The wastewater after heat exchange is returned to cooling pool 3 and can be used as a makeup water source for the mechanical cooling tower.

[0024] The requirements for each component of this utility model are as follows:

[0025] 1. The serpentine tube 7 (installed inside the original water tank 2) is required to have good heat transfer performance and corrosion resistance.

[0026] 2. The pipes connecting the various components are made of high-temperature and corrosion-resistant materials, such as stainless steel pipes, to ensure the safety and stability of the transportation.

[0027] 3. The control valve is a manual door, an electric door, or an automatic regulating control valve: used to regulate and isolate the drainage volume.

[0028] 4. Temperature sensor: accurately measures the temperature of the drain water and raw water in order to monitor and control the heating process.

[0029] 5. Pressure sensor: monitors the pressure in the heat exchange pipeline and the steam pressure.

[0030] 6. Thermal insulation (i.e., each pipe is equipped with an insulation layer): Insulate the pipes along the route to reduce heat loss and prevent burns to personnel.

[0031] 7. Flow meter (i.e. flow monitoring device): confirms the continuous discharge flow rate of the steam drum.

[0032] Issues to consider:

[0033] 1. The heat exchanger 7 will occupy the space of the raw water tank 2, affecting the volume of the raw water tank 2.

[0034] 2. Since the original water tank 2 is not in a constant water intake state, it is easy to cause localized heat in the exchange water. It is necessary to add a disturbance device, such as a mixer.

[0035] To ensure the smooth implementation and safe operation of the plan, factors such as pressure balance, pipeline support, and equipment layout must be fully considered during the design and construction process. Furthermore, regular maintenance and inspection of the equipment are necessary to guarantee its long-term stable operation.

[0036] In winter, the waste heat from the boiler drain is used to automatically raise the inlet water temperature of the demineralized water system by 25-35℃, enhancing water permeability and thus improving water production efficiency. The drain temperature from the boiler drum is approximately 270℃.

[0037] Example 2

[0038] This utility model provides a demineralized water system with a heating device, such as Figure 2 As shown, it includes a boiler grate 1, the outlet of the boiler grate 1 is connected to the first inlet of a plate heat exchanger 4 via a pipeline, the plate heat exchanger 4 is located outside the raw water tank 2, the first outlet of the plate heat exchanger 4 is connected to a cooling pool 3 via a pipeline, the inlet of the raw water tank 2 is connected to the second outlet of the plate heat exchanger 4 via a pipeline, and the outlet of the raw water tank 2 is connected to the second inlet of the plate heat exchanger 4 via a pipeline; a branch pipe leading to a water production system 6 is connected to the pipeline between the inlet of the raw water tank 2 and the second outlet of the plate heat exchanger 4.

[0039] When the raw water tank 2 is working, the water in the raw water tank 2 is lifted by a booster pump at regular intervals, and then sent through the pipeline to the second inlet of the plate heat exchanger 4. The heated water is then sent to the water production system 6. However, when the raw water tank 2 is not working, the water in the raw water tank 2 will not enter the plate heat exchanger 4, which will cause local overheating of the plate heat exchanger 4.

[0040] Therefore, in this embodiment, a circulation pump 5 is also connected to the pipeline connecting the outlet of the raw water tank 2 and the second inlet of the plate heat exchanger 4. By adding the circulation pump 5, local overheating of the plate heat exchanger 4 is prevented when the cold source water (water in the raw water tank 2) is interrupted. That is, the circulation pump 5 accelerates the flow rate of the raw water in the pipeline between the raw water tank 2 and the plate heat exchanger 4, and accelerates the delivery of the raw water in the raw water tank 2 into the plate heat exchanger 4, thereby preventing local overheating of the plate heat exchanger 4. The circulation pump 5 can be in continuous operation; or it can operate only when the booster pump in the raw water tank 2 is not operating, and the circulation pump 5 is not operating when the booster pump in the raw water tank 2 is operating.

[0041] In addition, the inlet and outlet of the circulating pump 5 are connected in parallel to a pipeline with another circulating pump 5, and a valve is installed on each pipeline where the circulating pump 5 is located to control the opening and closing of the current pipeline. When one of the circulating pumps 5 fails, the other circulating pump 5 will work, so that the water source at the plate heat exchanger 4 will not be overheated.

[0042] In this embodiment, a branch line is led out from the main pipe of boiler busbar 1, and a control valve and flow monitoring device are provided on the branch line to control the opening and closing of the branch line.

[0043] The working principle of this utility model is as follows:

[0044] 1. Draw a branch line from the main pipe of the steam drum grate (i.e., boiler grate 1) and install control valves and flow monitoring devices;

[0045] 2. The drain water is introduced into the plate heat exchanger 4 to exchange heat with the raw water coming out of the raw water tank 2 and entering the pipes inside the plate heat exchanger 4; wherein, the drain water does not come into contact with the raw water, and the pipes containing the raw water are heated by the drain water.

[0046] 3. Add a circulating pump 5 (or connect a circulating pump 5 in parallel) to the outlet of the raw water tank 2 and the pipeline between it and the plate heat exchanger 4 to accelerate the heat exchange between the raw water from the raw water tank 2 and the plate heat exchanger 4.

[0047] 4. Based on the target temperature required for the raw water, the control system automatically adjusts the opening of the control valves to control the flow rate of the water discharged from boiler continuous blowdown 1, thereby regulating the heating degree of the raw water;

[0048] 5. The heated raw water is divided into two paths. One path can directly enter the water purification system 6 for water purification, while the other path returns to the demineralized raw water tank 2.

[0049] 6. The wastewater after heat exchange is returned to cooling pool 3 and can be used as a makeup water source for the mechanical cooling tower.

[0050] 7. The inlet and outlet temperatures of boiler blowdown 1 and raw water tank 2 are monitored in real time using temperature sensors.

[0051] The requirements for each component of this utility model are as follows:

[0052] 1. Plate heat exchanger 4;

[0053] 2. The pipes connecting the various components are made of high-temperature and corrosion-resistant materials, such as stainless steel pipes, to ensure the safety and stability of the transportation process;

[0054] 3. The control valve is a manual door, an electric door, or an automatic regulating control valve: used to regulate and isolate the drainage volume;

[0055] 4. Temperature sensor: accurately measures the temperature of plate heat exchanger 4 and raw water in order to monitor and control the heating process;

[0056] 5. Pressure sensor: Monitors the pressure in the heat exchange pipeline and the steam pressure;

[0057] 6. Insulation: Insulate the pipelines along the route to reduce heat loss and prevent burns to personnel;

[0058] 7. Flow meter: Confirm the continuous blowdown flow rate of the steam drum;

[0059] 8. One water pump (i.e., circulating pump 5), the size of which shall be determined according to actual needs.

[0060] Everything else is the same as in Example 1.

Claims

1. A demineralized water system with a heating device, characterized in that, The system includes a boiler blower (1), the outlet of which is connected to the inlet of a heat exchanger that exchanges heat with the raw water tank (2) via a pipeline, the outlet of which is connected to a cooling pool (3) via a pipeline, and the outlet of the raw water tank (2) is connected to a water production system (6) via a pipeline. A branch is led out from the main pipe of the boiler blower (1), and a control valve and a flow monitoring device are provided on the branch to open and close the branch. The branch is connected to the heat exchanger. Temperature sensors are provided at the inlet and outlet positions of the boiler blower (1) and the raw water tank (2). The control valve is connected to a control module. Based on the temperature of the raw water in the raw water tank (2) detected by the temperature sensor, the control module automatically adjusts the opening of the control valve to control the flow rate of the water from the boiler blower (1), so that the temperature of the raw water reaches the target temperature required by the raw water in advance.

2. The demineralized water system with a heating device as described in claim 1, characterized in that, The heat exchanger is a serpentine tube (7), which is located in the original water tank (2); the outlet of the boiler drain (1) is connected to the serpentine tube (7) through a pipeline, and the outlet of the serpentine tube (7) is connected to the cooling pool (3) through a pipeline.

3. A demineralized water system with a heating device as described in claim 2, characterized in that, The raw water tank (2) is equipped with a disturbance device.

4. A demineralized water system with a heating device as described in claim 1, characterized in that, The heat exchanger is a plate heat exchanger (4). The plate heat exchanger (4) is located outside the raw water tank (2). The outlet of the boiler drain (1) is connected to the first inlet of the plate heat exchanger (4) through a pipeline. The first outlet of the plate heat exchanger (4) is connected to the cooling pool (3) through a pipeline. The inlet of the raw water tank (2) is connected to the second outlet of the plate heat exchanger (4) through a pipeline. The outlet of the raw water tank (2) is connected to the second inlet of the plate heat exchanger (4) through a pipeline. A branch pipe leading to the water production system (6) is connected on the pipeline between the inlet of the raw water tank (2) and the second outlet of the plate heat exchanger (4).

5. A demineralized water system with a heating device as described in claim 4, characterized in that, A circulating pump (5) is connected to the pipeline connecting the outlet of the raw water tank (2) and the second inlet of the plate heat exchanger (4).

6. A demineralized water system with a heating device as described in claim 5, characterized in that, The inlet and outlet of the circulating pump (5) are connected in parallel to a pipeline with another circulating pump (5), and a valve is installed on each pipeline where the circulating pump (5) is located.

7. A demineralized water system with a heating device as described in any one of claims 1-6, characterized in that, Each of the aforementioned pipelines is connected to a pressure sensor.

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