Scale preventing and removing method for heat exchanger

Abstract

The invention provides a heat exchanger scale prevention and removal method which comprises the steps that water in an elevated water tank flows into a circulating pump and then flows to a first negative electron generator, and after the first negative electron generator conducts scale prevention and removal on the water, the water flows to a hot water boiler; the hot water boiler heats water to a preset temperature; the water of the user terminal flows to the negative electron generator II; the negative electron generator II treats the inflowing backwater and then enables the backwater to flow to the heat exchanger; the hot water boiler enables water heated to the preset temperature to flow into the heat exchanger to heat water in the heat exchanger; the heated water enters the hot water storage tank; the two negative electron generators are matched with the heat exchanger, water entering the hot water boiler, return water of the user terminal and water supplemented through the cold water port are treated through the negative electron technology, generation of scale can be greatly reduced, meanwhile, the descaling capacity is achieved, and the water boiler is energy-saving and environment-friendly. The water scale does not need to be specially treated, maintenance difficulty is lowered, cost is saved, and high economic value is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of scale prevention and descaling in a water treatment system, and in particular to a heat exchanger scale prevention and descaling method. Background Art

[0002] After the hot water boiler system previously built by the applicant had been used for a long time, a large amount of calcium salts and magnesium salts dissolved in the water. These low-solubility minerals would precipitate from the water and become tiny solid particles. When these tiny solid particles encountered high-temperature metal heating surfaces during the flow of water, they would more easily adhere to them and form scale. Due to the poor thermal conductivity of scale, it would reduce thermal efficiency, reduce the cross-sectional area of ​​the pipeline, and affect the normal operation of the system. Therefore, it was necessary to carry out anti-scaling and descaling.

[0003] In order to solve the technical problem that scale will be generated in the hot water boiler system after a long period of use, it is necessary to make further improvements and develop a method that can prevent the generation of scale and remove existing scale. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a method for preventing and removing scale from a heat exchanger, which solves the technical problem that scale is generated in a hot water boiler system after being used for a long time.

[0005] The present invention is achieved through the following technical solutions: 1. A method for preventing and removing scale from a heat exchanger, comprising the following steps: Step 1: Water in the elevated tank flows to the filter; Step 2: The water filtered by the filter flows to the negative electron generator 1 under the action of the circulation pump; Step 3: Once the negative electron generator is started, it continuously releases a large number of negative electrons into the water. After the water is filled with a large number of negative electrons, the water flows to the hot water boiler; Step 4: The hot water boiler heats the incoming water to a preset temperature. A circulating pump then pumps the heated water to the heat exchanger, where it releases heat before returning to the boiler for reheating, forming a closed hot water circulation loop. Step 5: The water in the hot water storage tank flows to the user terminal, and the return water from the user terminal flows to the negative electron generator 2; Step 6: After the negative electron generator 2 is started, it continuously releases a large number of negative electrons into the water. The return water from the user terminal is filled with a large number of negative electrons and flows to the heat exchanger; Step 7: The return water from the user terminal exchanges heat with the hot water flowing in from the hot water boiler in the heat exchanger, and the return water temperature of the user terminal increases; Step 8: The user terminal return water after the temperature rises flows into the hot water storage tank; Step 9: The water in the hot water storage tank flows to the user terminal, and the cycle from step 5 to step 9 is repeated to complete the cycle.

[0006] Preferably: in step 1, a flow regulating valve is provided between the hot water boiler and the heat exchanger.

[0007] Preferably: in step nine, the hot water storage tank is provided with a temperature detection device. When the temperature of the hot water storage tank is higher than a set value, the water flow is reduced through the flow regulating valve between the hot water boiler and the heat exchanger; when the temperature of the hot water storage tank is lower than the set value, the water flow is increased through the flow regulating valve between the hot water boiler and the heat exchanger.

[0008] Preferably: in step five, the negative electron generator 2 is connected to a cold water inlet, and when water needs to be replenished, it is replenished through the cold water inlet; the newly replenished water flows through the negative electron generator 2 and then flows into the heat exchanger.

[0009] Preferably, the circulation pump is a high-temperature resistant variable frequency pump.

[0010] Preferably, a valve is provided on the elevated water tank, and when the hot water boiler needs to be replenished with water, the valve of the elevated water tank is opened to replenish water.

[0011] Preferably: the user terminal is a radiator.

[0012] Beneficial effects of the present invention: The present invention uses negative electron technology to process the water entering the hot water boiler, the return water to the user terminal, and the water supplemented through the cold water inlet through the cooperation of two negative electron generators and a heat exchanger. The negative electrons fill the entire circulation loop. The hot water boiler system designed in this application can greatly reduce the generation of scale and has the ability to remove scale. After the hot water boiler is in operation, there is no need to specially treat the scale, which reduces the difficulty of maintenance, saves costs, and has high economic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a flow chart of a heat exchanger anti-scaling and descaling method proposed by the present invention; DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0015] like Figure 1 As shown, the present invention provides an embodiment: a heat exchanger anti-scaling and descaling method, comprising the following steps: Step 1: Water in the elevated tank flows to the filter; The water stored in the elevated water tank is untreated room temperature water. The elevated water tank is located at a high place. A filter is installed between the elevated water tank and the circulation pump line. The filter performs preliminary physical filtration on the room temperature water flowing out of the elevated water tank to prevent large impurity particles from entering the circulation pump. Large impurity particles will affect the normal operation of subsequent equipment.

[0016] There is a valve on the elevated water tank. When the hot water boiler system does not need to be replenished with water, the valve can be closed. After the valve is closed, the water in the elevated water tank will no longer flow to the circulation pump.

[0017] Step 2: The water filtered by the filter flows to the negative electron generator 1 under the action of the circulation pump; The circulating pump is a high-temperature resistant variable frequency pump. As the power equipment in the hot water boiler system, the high-temperature resistant variable frequency pump can provide sufficient head to drive the water to flow continuously. It can also adjust the speed and flow rate to avoid excessive or insufficient pressure and idling, thereby achieving energy saving. The first negative electron generator is an SPL negative electron generator independently developed by the applicant. The circulating pump passes the water flowing out of the elevated water tank through the SPL negative electron generator. After the SPL negative electron generator is started, a large number of negative electrons will be released into the water. A large number of negative electrons combine with positively charged ions and salts to form neutral crystalline particles, which can avoid the formation of new chemical scaling; a large number of negative electrons have strong penetrating power of crystal layers, scale layers, organic scale layers or biological scale layers, and can penetrate step by step into the depths of the scale layer that has been formed, thereby forming a strong repulsive force. Under the action of the strong repulsive force, the original scale layer gradually forms a loose material layer. Under the flushing of water flow, the loose material layer can realize the peeling and falling off of the scale layer on the metal surface. At the same time, the negative electron generator can form a working environment in which scaling cannot form in the circulating water treatment system, ensuring that large scale will not form and adhere to the pipe wall. The above method can keep the pipe wall basically scale-free.

[0018] Step 3: Once the negative electron generator is started, it continuously releases a large number of negative electrons into the water. After the water is filled with a large number of negative electrons, the water flows to the hot water boiler; Step 4: The hot water boiler heats the incoming water to a preset temperature. A circulating pump then pumps the heated water to the heat exchanger, where it releases heat before returning to the boiler for reheating, forming a closed hot water circulation loop. The hot water boiler will heat the incoming water. The heating temperature can be set according to actual conditions. The heated water temperature is between 60-90°. When the hot water boiler needs to be replenished with water, open the valve of the elevated water tank to replenish water.

[0019] Step 5: The water in the hot water storage tank flows to the user terminal, and the return water from the user terminal flows to the negative electron generator 2; The user terminal refers to the radiator. A water pump is provided on the water supply pipe between the user terminal and the hot water storage tank. The function of the water pump is to flow the water in the hot water storage tank to the user terminal.

[0020] Step 6: After the negative electron generator 2 is started, it continuously releases a large number of negative electrons into the water. The return water from the user terminal is filled with a large number of negative electrons and flows to the heat exchanger; Negative electron generator 2 is connected to a cold water inlet. When the system needs to be replenished with water after running for a long time, it can be replenished through the cold water inlet; the newly replenished water first flows through negative electron generator 2, so that the replenished water contains a large number of negative electrons before flowing into the heat exchanger to prevent impurity particles in the water from damaging the heat exchanger. Negative electron generator 2 and negative electron generator 1 are the same equipment, and the number is only used as a distinguishing mark.

[0021] Step 7: The return water from the user terminal exchanges heat with the hot water flowing in from the hot water boiler in the heat exchanger, and the return water temperature of the user terminal increases; A flow regulating valve is installed between the hot water boiler and the heat exchanger. By controlling the water flow into the heat exchanger, the water temperature output by the heat exchanger is controlled. The greater the water flow, the higher the water temperature output by the heat exchanger.

[0022] Step 8: The user terminal return water after the temperature rises flows into the hot water storage tank; The hot water storage tank is equipped with a temperature detection device. When the temperature of the hot water storage tank is higher than the set value, the water flow can be reduced through the flow regulating valve between the hot water boiler and the heat exchanger; when the temperature of the hot water storage tank is lower than the set value, the water flow can be increased through the flow regulating valve between the hot water boiler and the heat exchanger to achieve temperature control of the water flowing into the hot water storage tank.

[0023] Step 9: The water in the hot water storage tank flows to the user terminal, and the cycle from step 5 to step 9 is repeated to complete the cycle.

[0024] The present invention uses negative electron technology to treat the water entering the hot water boiler, the return water to the user terminal, and the water replenished through the cold water inlet through the cooperation of two negative electron generators and a heat exchanger. The negative electrons fill the entire circulation loop. The hot water boiler system designed in this application can greatly reduce the generation of scale and has the ability to remove scale. After the hot water boiler is in operation, there is no need to specially treat the scale, which reduces the difficulty of maintenance, saves costs, and has high economic value.

[0025] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions may be made to these embodiments without departing from the principles of the present invention, and these changes and substitutions are also within the scope of protection of the present invention.

Claims

1. A heat exchanger anti-scaling and descaling method, characterized by: The following steps are involved: Step 1: Water in the elevated tank flows to the filter; Step 2: The water filtered by the filter flows to the negative electron generator 1 under the action of the circulation pump; Step 3: Once the negative electron generator is started, it continuously releases a large number of negative electrons into the water. After the water is filled with a large number of negative electrons, the water flows to the hot water boiler; Step 4: The hot water boiler heats the incoming water to a preset temperature. A circulating pump then pumps the heated water to the heat exchanger, where it releases heat before returning to the boiler for reheating, forming a closed hot water circulation loop. Step 5: The water in the hot water storage tank flows to the user terminal, and the return water from the user terminal flows to the negative electron generator 2; Step 6: After the negative electron generator 2 is started, it continuously releases a large number of negative electrons into the water. The return water from the user terminal is filled with a large number of negative electrons and flows to the heat exchanger; Step 7: The return water from the user terminal exchanges heat with the hot water flowing in from the hot water boiler in the heat exchanger, and the return water temperature of the user terminal increases; Step 8: The user terminal return water after the temperature rises flows into the hot water storage tank; Step 9: The water in the hot water storage tank flows to the user terminal, and the cycle from step 5 to step 9 is repeated to complete the cycle.

2. The heat exchanger anti-scaling and descaling method according to claim 1, characterized in that: In step one, a flow regulating valve is provided between the hot water boiler and the heat exchanger.

3. The heat exchanger anti-scaling and descaling method according to claim 2, characterized in that: In step nine, the hot water storage tank is provided with a temperature detection device. When the temperature of the hot water storage tank is higher than the set value, the water flow is reduced through the flow regulating valve between the hot water boiler and the heat exchanger; when the temperature of the hot water storage tank is lower than the set value, the water flow is increased through the flow regulating valve between the hot water boiler and the heat exchanger.

4. The heat exchanger anti-scaling and descaling method according to claim 1, characterized in that: In step five, the negative electron generator 2 is connected to a cold water inlet. When water needs to be replenished, it is replenished through the cold water inlet. The newly replenished water flows through the negative electron generator 2 and then flows into the heat exchanger.

5. The heat exchanger anti-scaling and descaling method according to claim 1, characterized in that: The circulating pump is a high-temperature resistant variable frequency pump.

6. The heat exchanger anti-scaling and descaling method according to claim 1, characterized in that: The elevated water tank is provided with a valve. When the hot water boiler needs to be replenished with water, the valve of the elevated water tank is opened to replenish water.

7. The heat exchanger anti-scaling and descaling method according to claim 1, characterized in that: The user terminal refers to a radiator.

Images