Centralized water replenishing treatment device for heat supply

Abstract

The utility model discloses a centralized water replenishing treatment device for heat supply. The device mainly comprises a raw water tank, the bottom of the raw water tank is in butt joint with the water inlet end of a water pump through a first water inlet pipe, the water outlet end of the water pump is in butt joint with the water inlet end of a coarse filter through a second water inlet pipe, and the water outlet end of the coarse filter is in butt joint with the water inlet end of a plate heat exchanger through a heat exchange water inlet pipe; the water outlet end of the plate heat exchanger is in butt joint with the water inlet end of the quartz sand filter through a heat exchange water outlet pipe, and the water outlet end of the RO filter device is in butt joint with the water inlet end of the auxiliary treatment device. And pollutants such as large-particle impurities, suspended impurities, colloids, organic matters, residual chlorine and various ions in the raw water are gradually removed, the water quality is deeply purified, the impurities can be prevented from being accumulated in a heat supply system, and the normal operation of the heat supply system is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water treatment in heating engineering, in particular to a centralized make-up water treatment device for heating. BACKGROUND

[0002] The centralized make-up water treatment device for heating is an important equipment for supplementing and treating circulating water in a heating system, which mainly functions to ensure stable water quality of the heating system, maintain pressure balance of the system, and prevent equipment damage or efficiency reduction caused by water quality problems.

[0003] However, the existing raw water pretreatment efficiency is insufficient, which can easily cause system blockage, and can easily cause blockage of heat exchangers and filtration equipment. In addition, there is a lack of waste heat recovery. If the raw water is not preheated, a large amount of energy will be consumed for subsequent heating. In addition, the unsuitable raw water temperature will affect the subsequent treatment process, which is not energy-saving. In addition, if the microorganisms of the treated water exceed the standard or the pH value is not appropriate, the heating pipeline and equipment will be corroded, which will affect the operation of the heating system.

[0004] Therefore, it is necessary to provide a centralized make-up water treatment device for heating to solve the above problems.

[0005] It should be noted that the above information disclosed in the background section of the present application is only used to understand the background technology of the concept of the present application, and therefore, it can contain information that does not constitute prior art. CONTENT OF THE UTILITY MODEL

[0006] The purpose of the present utility model is to provide a centralized make-up water treatment device for heating to solve the problems raised in the background technology.

[0007] The technical solution adopted by the present application to solve its technical problems is:

[0008] A centralized make-up water treatment device for heating, comprising a raw water tank, the bottom of the raw water tank is connected and installed with the water inlet end of a water pump through a first water inlet pipe, the water outlet end of the water pump is connected and installed with the water inlet end of a coarse filter through a second water inlet pipe, the water outlet end of the coarse filter is connected and installed with the water inlet end of a plate heat exchanger through a heat exchange water inlet pipe, the water outlet end of the plate heat exchanger is connected and installed with the water inlet end of a quartz sand filter through a heat exchange water outlet pipe, the water outlet end of the quartz sand filter is connected and installed with an active carbon filter through a third water inlet pipe, the water outlet end of the active carbon filter is connected and installed with the water supply end of an RO filter device through a fourth water outlet pipe, the water outlet end of the RO filter device is connected and installed with the water inlet end of an auxiliary treatment device, and the water outlet end of the auxiliary treatment device is connected and installed with a water production tank through a fifth water outlet pipe.

[0009] Preferably, the side wall of the fourth water outlet pipe is connected to one end of the reducing water inlet pipe and the scale-inhibiting water inlet pipe respectively through a three-way valve, the other end of the reducing water inlet pipe is connected to a reducing agent device, and the other end of the scale-inhibiting water inlet pipe is connected to a scale-inhibiting agent device.

[0010] Preferably, the RO filter device comprises a security filter, an RO high-pressure pump, and an RO membrane assembly, the water inlet end of the security filter is connected to the fourth water outlet pipe, the water outlet end of the security filter is connected to the water inlet end of the RO high-pressure pump through a water pipe, the water outlet end of the RO high-pressure pump is connected to the water inlet end of the RO membrane assembly through a pipeline, and the water outlet end of the RO membrane assembly is connected to the water inlet end of the auxiliary treatment device.

[0011] Preferably, the RO membrane assembly comprises a primary RO membrane assembly and a secondary RO membrane assembly, the primary RO membrane assembly comprises at least four membrane elements, the four membrane elements are connected in parallel through a water pipe, the common water inlet end of the four membrane elements is connected to the water outlet end of the RO high-pressure pump through a water pipe, the secondary RO membrane assembly comprises at least two membrane elements, the two membrane elements are connected in parallel through a water pipe, the common water inlet end of the two membrane elements is connected to the common water outlet end of the four membrane elements of the primary RO membrane assembly in series through a water pipe, and the common water outlet end of the two membrane elements is connected to the water inlet end of the auxiliary treatment device.

[0012] Preferably, the auxiliary treatment device comprises a pH adjusting device and an ozone generator, the water inlet end of the pH adjusting device is connected to the common water outlet end of the two membrane elements through a water pipe, the water outlet end of the pH adjusting device is connected to the ozone generator in series through a water pipe, and the water outlet end of the ozone generator is connected to the water tank through a fifth water outlet pipe.

[0013] The beneficial effects of the present application are:

[0014] 1. Through a series of filtering equipment such as a coarse filter, a quartz sand filter, an activated carbon filter, and an RO filter device, large-particle impurities, suspended impurities, colloids, organic matter, residual chlorine, various ions, and other pollutants in raw water are gradually removed, the water quality is deeply purified, impurities can be prevented from accumulating in the heating system, pipeline blockage and equipment corrosion can be avoided, the service life of the heating equipment is prolonged, and the normal operation of the heating system is ensured.

[0015] 2. The plate heat exchanger is used to preheat raw water, so that the temperature of the raw water is increased to approach the required temperature range of the subsequent treatment process, the energy consumption in the subsequent heating process is reduced, and the energy utilization efficiency is improved. At the same time, through the high-efficiency filtration of the RO membrane assembly and the fine adjustment of the water quality by the auxiliary treatment device, the high quality of the make-up water is ensured, the heating system can operate more efficiently, energy loss and system failure caused by water quality problems are reduced, and the effect of energy saving and consumption reduction is indirectly realized.

[0016] In addition to the above described objects, features and advantages, the present application has other objects, features and advantages. These will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which form a part of this specification, are included to provide a further understanding of the application and are incorporated by reference herein. The embodiments illustrated in the drawings are intended to explain the present application and are not intended to limit the present application.

[0018] In the drawings:

[0019] Figure 1 It is an overall schematic view of the centralized water replenishing treatment device for heat supply.

[0020] In the drawings, various reference signs:

[0021] 1, raw water tank; 2, water pump; 4, coarse filter; 5, plate heat exchanger; 6, quartz sand filter; 7, activated carbon filter; 8, reducing agent device; 9, scale inhibitor device;

[0022] 10, RO filter device; 101, security filter; 102, RO high-pressure pump; 103, primary RO membrane assembly; 104, secondary RO membrane assembly;

[0023] 11, water production tank;

[0024] 12, first water inlet pipe; 13, second water inlet pipe; 14, heat exchange water inlet pipe; 15, heat exchange water outlet pipe; 16, third water inlet pipe; 17, reducing water inlet pipe; 18, scale inhibiting water inlet pipe; 19, fourth water outlet pipe; 20, fifth water outlet pipe;

[0025] 21, pH adjusting device; 22, ozone generator. DETAILED DESCRIPTION

[0026] It should be noted that the embodiments and features in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative labor should fall within the protection scope of the present application.

[0028] Please refer to Figure 1The utility model provides an embodiment provided by the utility model discloses a centralized water replenishing treatment device for heat supply,

[0029] A centralized water replenishing treatment device for heat supply, comprising a raw water tank 1, temporarily storing untreated raw water such as underground water or municipal water, the bottom of the raw water tank 1 is connected and installed with the water inlet end of a water pump 2 through a first water inlet pipe 12, raw water enters the water tank through gravity or external pressure, a liquid level sensor is arranged in the water tank to control the start and stop of the water pump 2, the water outlet end of the water pump 2 is connected and installed with the water inlet end of a coarse filter 4 through a second water inlet pipe 13, the water outlet end of the coarse filter 4 is connected and installed with the water inlet end of a plate heat exchanger 5 through a heat exchange water inlet pipe 14, the coarse filter 4 preliminarily intercepts large-particle impurities such as silt and rust to protect the plate heat exchanger 5 from being blocked.

[0030] The water outlet end of the plate heat exchanger 5 is connected and installed with the water inlet end of a quartz sand filter 6 through a heat exchange water outlet pipe 15, raw water preliminarily filtered through the coarse filter 4 enters the plate heat exchanger 5 through the heat exchange water inlet pipe 14, the plate heat exchanger 5 is formed by a series of metal sheets with corrugated shapes, and channels of cold and hot fluids are formed between the sheets. Hot water on the hot side and raw water on the cold side flow reversely on both sides of the sheets, heat exchange is carried out through the metal sheets, heat is transferred from the hot water to the raw water, the temperature of the raw water is increased, preheating the raw water can reduce the energy consumption in the subsequent heating process, improve the energy utilization efficiency, and also can make the temperature of the raw water closer to the temperature range required by the subsequent treatment process, which is beneficial to the stable operation of the subsequent treatment process.

[0031] After the raw water is heat-exchanged through the plate heat exchanger 5, the raw water enters the quartz sand filter 6 through the heat exchange water outlet pipe 15. The quartz sand filter 6 is filled with multiple layers of quartz sand filter material, and the raw water passes through the filter material layer from top to bottom, and the suspended impurities and colloids in the water are adsorbed and intercepted by the quartz sand filter material. When the filter runs for a period of time, the filter material layer will intercept a large amount of impurities, causing the filtration resistance to increase, at which time the automatic backwashing system starts. When backwashing, the water flow reverses through the filter material layer, washing away the intercepted impurities and discharging them through a blowdown port, the quartz sand filter 6 further purifies the water quality, removes the small suspended particles and colloids in the raw water, and makes the water quality clearer.

[0032] The water outlet end of the quartz sand filter 6 is connected to the water inlet end of the activated carbon filter 7 through the third water inlet pipe 16, and the water outlet end of the activated carbon filter 7 is connected to the water inlet end of the RO filter device 10 through the fourth water outlet pipe 19. The water flowing out of the quartz sand filter 6 enters the activated carbon filter 7 through the third water inlet pipe 16. The activated carbon has a rich microporous structure, and these micropores provide a large specific surface area. Pollutants in water, such as organic matter, part of heavy metal ions, residual chlorine, etc., are adsorbed on the microporous surface of the activated carbon by van der Waals force. As the running time increases, the adsorption capacity of the activated carbon will gradually decrease, at which time part of the pollutants adsorbed on the surface of the activated carbon can be washed away by the impact force of the water flow through backwashing operation, thereby restoring part of the activity of the activated carbon. The activated carbon filter 7 can deeply purify water quality and remove various pollutants in water, especially the adsorption effect of organic matter and residual chlorine is remarkable.

[0033] It is worth noting that the side wall of the fourth water outlet pipe 19 is connected to one end of the reducing water inlet pipe 17 and the scale inhibition water inlet pipe 18 through a three-way valve, respectively. The other end of the reducing water inlet pipe 17 is connected to the reducing agent device 8, and the other end of the scale inhibition water inlet pipe 18 is connected to the scale inhibition agent device 9.

[0034] In the side wall of the fourth water outlet pipe 19, the reducing water inlet pipe 17 and the scale inhibition water inlet pipe 18 are connected through a three-way valve, respectively. The reducing agent device 8 adds reducing agent, such as sodium sulfite, to water in a certain amount through a metering pump. The reducing agent reacts with the residual chlorine in water to reduce the residual chlorine to harmless sulfate, thereby eliminating the residual chlorine that is not completely removed by the activated carbon. The scale inhibition agent device 9 also injects scale inhibition agent into water through a metering pump. The effective components in the scale inhibition agent combine with calcium, magnesium and other ions in water through chelation, dispersion and other actions, preventing the growth and aggregation of CaCO3, CaSO4 and other slightly soluble salt crystals, so that they are difficult to form a scale layer on the surface of the RO membrane. The function of the reducing agent device 8 is to protect the RO membrane assembly and prevent the oxidation damage of residual chlorine to the RO membrane, thereby prolonging the service life of the RO membrane. The scale inhibition agent device 9 inhibits the scaling of slightly soluble salts on the surface of the RO membrane, avoids the influence of the scale layer on the water permeability and desalination rate of the RO membrane, and ensures the efficient and stable operation of the RO filter device 10.

[0035] The water outlet end of the RO filter device 10 is connected to the water inlet end of the auxiliary treatment device, and the water outlet end of the auxiliary treatment device is connected to the water tank 11 through the fifth water outlet pipe 20.

[0036] Specifically, the RO filtering device 10 comprises a security filter 101, an RO high-pressure pump 102 and an RO membrane assembly. The water inlet end of the security filter 101 is connected to the fourth water outlet pipe 19. The security filter 101 is used as a front protection device of the RO filtering device 10 to prevent the RO high-pressure pump 102 and the RO membrane assembly from being mechanically damaged by the tiny impurities. The water outlet end of the security filter 101 is connected to the water inlet end of the RO high-pressure pump 102 through a water pipe. The RO high-pressure pump 102 provides power for the RO membrane separation process. The water outlet end of the RO high-pressure pump 102 is connected to the water inlet end of the RO membrane assembly through a pipe. The water outlet end of the RO membrane assembly is connected to the water inlet end of the auxiliary treatment device.

[0037] The water treated by the above process first enters the security filter 101. The security filter 101 is internally provided with a filter element with high precision to further remove the tiny impurities remaining in the water to prevent them from entering the RO high-pressure pump 102 and the RO membrane assembly. The filtered water enters the RO high-pressure pump 102 through a water pipe. The RO high-pressure pump 102 provides sufficient pressure for the water to overcome the osmotic pressure of the RO membrane and pass through the RO membrane assembly. The RO membrane assembly has the characteristic of selective permeation, allowing only water molecules to pass through, while various ions, bacteria, viruses and other impurities in the water are intercepted, thereby realizing water purification and desalination.

[0038] The RO membrane assembly comprises a primary RO membrane assembly 103 and a secondary RO membrane assembly 104. The primary RO membrane assembly 103 comprises at least four membrane elements which are connected in parallel through water pipes. The common water inlet end of the four membrane elements is connected to the water outlet end of the RO high-pressure pump 102 through a water pipe. The secondary RO membrane assembly 104 comprises at least two membrane elements which are connected in parallel through water pipes. The common water inlet end of the two membrane elements is connected in series to the common water outlet end of the four membrane elements of the primary RO membrane assembly 103 through a water pipe. The common water outlet end of the two membrane elements is connected to the water inlet end of the auxiliary treatment device.

[0039] The primary RO membrane assembly 103 is composed of at least four membrane elements connected in parallel through water pipes. The high-pressure water output from the RO high-pressure pump 102 enters the common water inlet end of the primary RO membrane assembly 103 and then is distributed into each membrane element. In each membrane element, the water is filtered under the action of pressure. Most of the water molecules permeate through the RO membrane to become product water, while the impurities are intercepted and discharged with the concentrated water. The product water of the primary RO membrane assembly 103 is collected at the common water outlet end and then enters the secondary RO membrane assembly 104. The secondary RO membrane assembly 104 is composed of at least two membrane elements connected in parallel through water pipes. The water inlet end of the secondary RO membrane assembly 104 is connected in series to the water outlet end of the primary RO membrane assembly 103. In the secondary RO membrane assembly 104, the water is filtered again to further improve the purity of the product water.

[0040] The auxiliary treatment device comprises a pH adjusting device 21 and an ozone generator 22, the water inlet end of the pH adjusting device 21 is connected to the common water outlet end of the two membrane elements through a water pipe, the water outlet end of the pH adjusting device 21 is connected to the ozone generator 22 through a water pipe in series, and the water outlet end of the ozone generator 22 is connected to the water production tank 11 through a fifth water outlet pipe 20. The water flowing out of the secondary RO membrane assembly 104 enters the pH adjusting device 21, the pH adjusting device 21 adjusts the acidity and alkalinity of the water by adding an acidic or alkaline agent, such as hydrochloric acid or sodium hydroxide solution, according to the set pH value target, so that the pH value of the water reaches the required range for heat supply water replenishment. The water after pH adjustment enters the ozone generator 22, the ozone generator 22 generates ozone and injects it into the water. Ozone has strong oxidizing property and can kill bacteria, viruses and other microorganisms remaining in the water, and can further oxidize and decompose a small amount of organic matter that may exist in the water.

[0041] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A centralized water replenishment treatment device for heating, characterized by: The utility model provides an improved water purification system, which comprises a raw water tank (1), a water pump (2), a coarse filter (4), a plate heat exchanger (5), a quartz sand filter (6), an active carbon filter (7), an RO filter device (10), an auxiliary treatment device and a water tank (11).

2. The central water replenishment treatment device for heating according to claim 1, characterized in that: The fourth water outlet pipe (19) is connected to a reducing water inlet pipe (17) and a scale-inhibiting water inlet pipe (18) through a three-way valve.

3. The central water replenishment treatment device for heating according to claim 1, characterized in that: The RO filter device (10) comprises a security filter (101), an RO high-pressure pump (102) and an RO membrane assembly.

4. The centralized makeup water treatment device for heating according to claim 3, characterized in that: The security filter (101) is connected to the fourth water outlet pipe (19) through a water pipe.

5. The centralized makeup water treatment device for heating according to claim 4, characterized in that: The RO membrane assembly comprises a primary RO membrane assembly (103) and a secondary RO membrane assembly (104). The primary RO membrane assembly (103) comprises at least four membrane elements connected in parallel through a water pipe. The secondary RO membrane assembly (104) comprises at least two membrane elements connected in parallel through a water pipe. The auxiliary treatment device comprises a pH regulator (21) and an ozone generator (22). The pH regulator (21) is connected to the common outlet of the two membrane elements through a water pipe. The pH regulator (21) is connected to the ozone generator (22) through a water pipe. The ozone generator (22) is connected to the water tank (11) through a fifth water outlet pipe (20).

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