Automatic chemical adding device of heat supply system

Abstract

The utility model relates to an automatic medicament adding device for a heat supply system, which comprises a controller, a pH (Potential of Hydrogen) online monitoring sensor, a medicament adding tank and a medicament mixing tank, and a first electric ball valve and a third electric ball valve are arranged on a pipeline between the medicament adding tank and the medicament mixing tank; a secondary water supply pipeline is connected between the first electric ball valve and the third electric ball valve through a water inlet pipe, a second electric ball valve is installed on the water inlet pipe, the medicine mixing tank is connected to a secondary water return pipeline through a medicine outlet pipe, and a fourth electric ball valve is installed on the medicine outlet pipe. A stirring impeller is mounted in the mixing medicine tank and is connected to a motor through an impeller connecting rod; the ph online monitoring sensor is installed on a secondary water supply pipeline, and the controller is electrically connected with the ph online monitoring sensor, the first electric ball valve, the third electric ball valve, the second electric ball valve, the fourth electric ball valve and the motor. The water treatment effect is improved, and the equipment investment and the operation and maintenance cost are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of hot water treatment, in particular to an automatic medicine dosing device for a heating system. Background Art

[0002] The addition of water treatment chemicals to the heating system is an important part of ensuring the normal operation of the heating system and extending the life of the equipment. At present, water treatment chemicals are usually added by means of medicine tanks and booster pumps, which automatically start pumping and adding chemicals by monitoring the pH value of the water in the heating system. However, this traditional addition method has some problems. First, the equipment investment of the system is high, and the purchase and installation of medicine tanks and booster pumps require a certain amount of capital investment, which increases the construction cost of the heating system; secondly, the operation and maintenance cost of the pump is high, and the booster pump requires regular maintenance and maintenance, including replacement of parts, cleaning and lubrication, etc. These maintenance costs will increase the operating cost of the system; in addition, due to the pressure changes in the heating system, it may sometimes exceed the head of the booster pump, resulting in the inability to effectively add chemicals, thereby affecting the water treatment effect.

[0003] At present, the commonly used method of adding water treatment chemicals is to add chemicals to the water supply tank and pump them into the secondary return water pipe through the water supply pump, but this will cause the following problems: 1. The chemicals settle at the bottom of the water tank, making it impossible to replenish the chemicals. Since the chemicals in the water supply tank cannot be completely dissolved and mixed, some of the chemicals may settle at the bottom of the water supply tank or in the pipe and cannot be fully utilized, which will lead to waste of chemicals and increase operating costs; 2. When the secondary return water system does not lose pressure, the water supply pump will not start, and the chemicals are often not replenished in time, resulting in insufficient replenishment of chemicals; 3. Overflow of the water supply tank can easily lead to leakage of chemicals, causing environmental pollution and waste of chemicals; 4. The chemicals in the water supply tank are easy to Pollute tap water and cause serious incidents; 5. Uneven concentration of chemicals: Since the chemicals in the water supply tank cannot be evenly mixed, the concentration of the chemicals may be unevenly distributed after being injected into the secondary return pipe, which will lead to poor water quality treatment in some areas and fail to achieve the expected anti-corrosion and anti-scaling effects; 6. Corrosion of chemical pumps: Some chemical agents are corrosive. Long-term use of water supply pumps for injection may cause corrosion and damage to the pump, increasing the cost of maintenance and replacement; 7. Inconvenient operation: Each time you add chemicals, you need to open the water supply tank, add the chemicals, and ensure that the chemicals are fully dissolved and mixed. This requires additional manpower and time, and the operation is relatively cumbersome and prone to operational errors.

[0004] In order to solve the above problems, we proposed a new type of automatic pressure dosing system device and method for water treatment agents in heating systems, aiming to reduce equipment investment and operation and maintenance costs and improve water treatment effects. Summary of the invention

[0005] The utility model solves the technical problem by adopting the following technical solutions:

[0006] An automatic dosing device for a heating system, the device comprising a controller, a dosing device, and a pH online monitoring sensor; the dosing device comprising a dosing tank and a mixing tank, the dosing tank being located above the mixing tank and being connected by a pipeline, a first electric ball valve and a third electric ball valve being installed on the pipeline between the dosing tank and the mixing tank, the first electric ball valve and the third electric ball valve being connected to a secondary water supply pipeline via an inlet pipe, and a second electric ball valve being installed on the inlet pipe, the mixing tank being connected to a secondary water return pipeline via an outlet pipe, and a fourth electric ball valve being installed on the outlet pipe; a stirring impeller being installed in the mixing tank, and the stirring impeller being connected to a motor via an impeller connecting rod;

[0007] The ph online monitoring sensor is installed on the secondary water supply pipeline, and the controller is electrically connected to the ph online monitoring sensor, the first electric ball valve, the third electric ball valve, the second electric ball valve, the fourth electric ball valve, and the motor respectively.

[0008] Furthermore, an electric ball valve is installed on the top of the mixed medicine tank, and an automatic exhaust valve is installed on the electric ball valve.

[0009] Furthermore, it also includes a fifth electric ball valve, which is installed at the bottom of the mixing medicine tank.

[0010] Furthermore, the controller adopts the product GT-7M controller.

[0011] The method for automatically dosing medicine in a heating system based on the automatic dosing device for dosing medicine in a heating system comprises the following steps:

[0012] S1. The pH value in the secondary water supply pipeline is obtained through the pH online monitoring sensor. The controller makes a judgment based on the obtained pH value. If it is lower than the set value, the controller controls the medicine in the dosing tank to be added to the mixing tank and discharges the gas in the mixing tank;

[0013] S2. When the medicine in the mixed medicine tank reaches the set amount, the controller stops adding medicine, and the water in the secondary water supply pipeline enters the mixed medicine tank through the water inlet pipe. The controller controls the stirring impeller to stir and mix;

[0014] S3, when the set stirring time is reached, the medicine in the mixed medicine tank is added into the secondary return water pipeline through the medicine outlet pipe 13;

[0015] S4, repeat the above steps S1-S3 in sequence until all the reagents are added.

[0016] Furthermore, when the mixing medicine tank needs to be cleaned, the controller controls the water in the secondary water supply pipeline to enter the mixing medicine tank through the water inlet pipe, the stirring impeller stirs and cleans, and finally the waste liquid in the mixing medicine tank is discharged through the fifth electric ball valve.

[0017] The advantages and positive effects of the utility model are:

[0018] The device and method of the utility model realize accurate addition of the agent by introducing advanced control technology and equipment, solve the problems existing in the traditional addition method, thereby improving the water treatment effect and reducing equipment investment and operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The technical solution of the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it should be understood that these drawings are designed only for the purpose of explanation and are not intended to limit the scope of the utility model. In addition, unless otherwise specified, these drawings are only intended to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0020] Figure 1 It is a structural schematic diagram of an automatic agent dosing device for a heating system provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0021] First of all, it should be noted that the specific structure, features and advantages of the present invention will be specifically described below by way of example, but all descriptions are only for illustration and should not be understood as limiting the present invention in any way. In addition, any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature displayed or implied in the drawings, can still be combined or deleted between these technical features (or their equivalents) to obtain more other embodiments of the present invention that may not be directly mentioned in this document. In addition, in order to simplify the drawings, the same or similar technical features may be marked in only one place in the same drawing.

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0023] Example 1

[0024] like Figure 1As shown, the automatic dosing device for the heating system provided in this embodiment includes a controller A, a dosing device, and a ph online monitoring sensor 17; the dosing device includes a dosing tank 1 and a mixing tank 6, the dosing tank is located above the mixing tank, and the two are connected by a pipeline, a first electric ball valve 2 and a third electric ball valve 5 are installed on the pipeline between the dosing tank and the mixing tank, the first electric ball valve 2 and the third electric ball valve 5 are connected to the secondary water supply pipeline through an inlet pipe, and a second electric ball valve 4 is installed on the inlet pipe, the mixing tank is connected to the secondary return water pipeline through a drug outlet pipe, and a fourth electric ball valve 10 is installed on the drug outlet pipe; a stirring impeller 14 is installed in the mixing tank, and the stirring impeller is connected to the motor 16 through an impeller connecting rod 15;

[0025] The ph online monitoring sensor is installed on the secondary water supply pipeline, and the controller is electrically connected to the ph online monitoring sensor, the first electric ball valve 2, the third electric ball valve 5, the second electric ball valve 4, the fourth electric ball valve 10, and the motor respectively.

[0026] Specifically, in this embodiment, the primary water supply exchanges heat with the secondary return water at the heat exchanger, and after the heat exchange, the primary return water is sent for reheating, and the secondary water supply is sent to the user for heating; wherein, the ph online monitoring sensor 17 is installed on the secondary water supply pipeline leaving the heat exchanger, and can monitor the ph value of the secondary water supply sent for heating in real time, one end of the water inlet pipe 12 is connected to the secondary water supply pipeline, and the other end is connected to the first copper tee 3, and the second electric ball valve 4 is also installed on the water inlet pipe 12, the first electric ball valve 2 is installed on the pipeline between the dosing tank and the first copper tee 3, and the third electric ball valve 5 is installed on the pipeline between the mixing tank and the first copper tee 3;

[0027] An electric ball valve 8 is also installed on the top of the mixed medicine tank, and an automatic exhaust valve 7 is installed on the electric ball valve 8.

[0028] It also includes a fifth electric ball valve 11, which is installed at the bottom of the mixed medicine tank; in this embodiment, a second copper tee 9 is installed at the bottom of the mixed medicine tank, one outlet of the second copper tee is connected to the fifth electric ball valve 11, and the other outlet of the second copper tee is connected to the medicine outlet pipe, and a fourth electric ball valve 10 is installed on the medicine outlet pipe.

[0029] It should be noted that in order to achieve automatic control, the controller is electrically connected to the online monitoring sensor 17, the first electric ball valve, the second electric ball valve, the third electric ball valve, the fourth electric ball valve, the fifth electric ball valve, the motor, and the electric ball valve respectively. In this embodiment, the controller adopts the product GT-7M controller.

[0030] The method for automatically dosing chemicals in a heating system based on the automatic dosing device for dosing chemicals in a heating system comprises the following steps:

[0031] S1. The pH value in the secondary water supply pipeline is obtained through the pH online monitoring sensor. The controller makes a judgment based on the obtained pH value. If it is lower than the set value, the controller controls the medicine in the dosing tank to be added to the mixing tank and discharges the gas in the mixing tank;

[0032] S2. When the medicine in the mixed medicine tank reaches the set amount, the controller stops adding medicine, and the water in the secondary water supply pipeline enters the mixed medicine tank through the water inlet pipe. The controller controls the stirring impeller to stir and mix;

[0033] S3, when the set stirring time is reached, the medicine in the mixed medicine tank is added into the secondary return water pipeline through the medicine outlet pipe 13;

[0034] S4, repeat the above steps S1-S3 in sequence until all the reagents are added.

[0035] It should be noted that when the mixing medicine tank 6 needs to be cleaned, the controller controls the water in the secondary water supply pipeline to enter the mixing medicine tank through the water inlet pipe, the stirring impeller stirs and cleans, and finally the waste liquid in the mixing medicine tank is discharged through the fifth electric ball valve 11.

[0036] Specifically, in this embodiment, when it is necessary to add a drug, the specific method is as follows:

[0037] If the pH value monitored by the pH online monitoring sensor is lower than the set value 8, the controller GT-7M automatically controls to open the first electric ball valve 2, close the second electric ball valve 4, open the third electric ball valve 5, open the electric ball valve 8, close the fourth electric ball valve 10, and close the fifth electric ball valve 11, and the medicine in the dosing tank 1 is automatically added to the mixing medicine tank 6, and the automatic exhaust valve 7 discharges the gas in the medicine tank;

[0038] When a sufficient amount of medicine has been added to the medicine tank 6, GT-7M automatically controls to close the first electric ball valve 2, close the electric ball valve 8, open the second electric ball valve 4, start the motor 16, and the impeller connecting rod 14 drives the stirring impeller 14 to start stirring. After 10 seconds (the time can be set according to the tank volume and the characteristics of the medicine), the fourth electric ball valve 10 is opened. Because the water pressure in the water inlet pipe 12 is higher than the water pressure in the medicine outlet pipe 13, the medicine in the mixed medicine tank is replenished from the mixed medicine tank 6 through the medicine outlet pipe 13 into the secondary network return water network; after the addition of medicine is completed, the initial state is restored.

[0039] Through the device and method of this utility model patent, the automatic pressurized addition of water treatment agents in the heating system can be achieved, the water treatment effect can be improved, the equipment investment and operation and maintenance costs can be reduced, and a more reliable and economical solution can be provided for the normal operation of the heating system and the extension of equipment life.

[0040] The above embodiments describe the present invention in detail, but the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of application of the present invention shall still fall within the scope of the patent coverage of the present invention.

Claims

1. The automatic dosing device for heating system is characterized by: The device comprises a controller, a medicine dosing device, and a pH online monitoring sensor; the medicine dosing device comprises a medicine dosing tank and a mixing medicine tank, the medicine dosing tank is located above the mixing medicine tank, and the two are connected by a pipeline, a first electric ball valve and a third electric ball valve are installed on the pipeline between the medicine dosing tank and the mixing medicine tank, the first electric ball valve and the third electric ball valve are connected to a secondary water supply pipeline through an inlet pipe, and a second electric ball valve is installed on the inlet pipe, the mixing medicine tank is connected to a secondary water return pipeline through an outlet pipe, and a fourth electric ball valve is installed on the outlet pipe; a stirring impeller is installed in the mixing medicine tank, and the stirring impeller is connected to a motor through an impeller connecting rod; The ph online monitoring sensor is installed on the secondary water supply pipeline, and the controller is electrically connected to the ph online monitoring sensor, the first electric ball valve, the third electric ball valve, the second electric ball valve, the fourth electric ball valve, and the motor respectively.

2. The automatic dosing device for heating system according to claim 1 is characterized in that: An electric ball valve is also installed on the top of the mixed medicine tank, and an automatic exhaust valve is installed on the electric ball valve.

3. The automatic dosing device for heating system according to claim 1, characterized in that: It also includes a fifth electric ball valve, which is installed at the bottom of the mixing medicine tank.

4. The automatic dosing device for heating system according to claim 1 is characterized in that: The controller adopts the product GT-7M controller.

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