Heat supply network anti-corrosion dosing method and device
During the anti-corrosion and dosing process of the thermal network, the anti-corrosion agent and the softened water are fully mixed in the softened pipeline, and the mixed water is passed into the thermal network pipeline by using the thermal network water replenishment pump, the problem of difficulty in mixing the anti-corrosion agent is solved, and efficient anti-corrosion protection of the thermal network pipeline and power saving are achieved.
Patent Information
- Application Number
- CN202411633088.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2025-02-25
AI Technical Summary
In the existing anti-corrosion and dosing methods of thermal network, it is difficult for the anti-corrosion agent to mix smoothly with softened water, resulting in large electricity consumption and poor economic efficiency during the dosing process.
By passing the preservative agent into the softened pipe and mixing it with the softened water, and using the heat net water replenishing pump to pass the mixed softened water into the heat net pipe, ensuring that the preservative agent and the softened water are in full contact and mixing.
The anticorrosion agent is successfully mixed with softened water, which improves the anticorrosion effect of the thermal network pipeline, reduces power consumption, and improves economicality.
Smart Images
Figure CN119506897A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of pipeline anti-corrosion, and in particular to a method and device for adding medicine for anti-corrosion of a heating network. Background Art
[0002] Thermal power plants not only generate electricity but also provide heat. From November to March every year, it is the heating period for thermal power plants in the north. After the heating is over, in order to prevent the corrosion of hot water pipes, chemicals are generally pumped into the softening pipes through chemical dosing pumps, and the softened water brings the drugs into the heating network deaerator. Then the heating network feed water pump replenishes the mixed softened water into the heating network pipes for corrosion protection. However, since the output of the dosing pump is very small and the pressure of the softened water feed pipe is high, it is generally difficult for the dosing pump to pump the drugs into the softening pipe. At present, power plants generally stop the softening water pump first, start the dosing pump to pump the drugs into the softening pipe, and then start the softening water pump to bring the drugs into the heating network deaerator. During the entire dosing process, the heating network circulating water pump has been running, resulting in high power consumption for corrosion protection of the heating network and poor economy. Summary of the invention
[0003] In view of the problems existing in the above-mentioned existing heating network anti-corrosion and dosing methods and devices, the present invention is proposed.
[0004] Therefore, one of the objects of the present invention is to provide a method for adding medicine to a heating network to prevent corrosion, the purpose of which is to enable the antiseptic agent to be smoothly mixed with softened water.
[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a method for adding medicine to a heat network for corrosion prevention, comprising:
[0006] Mixing is done by passing the preservative into a softening pipe;
[0007] Bring the preservatives to the deaerator of the heating network through softened water; and,
[0008] The mixed softened water is introduced into the heating network pipeline through the heating network make-up water pump for corrosion protection.
[0009] As a preferred embodiment of the anti-corrosion and dosing method for the heating network of the present invention, the anti-corrosion agent mainly comprises an alkaline agent, and the pH value of the anti-corrosion agent after mixing with softened water is greater than 10.
[0010] As a preferred embodiment of the anti-corrosion and dosing method for the heating network of the present invention, the angle between the direction in which the anti-corrosion agent is introduced into the softening pipeline and the flow direction of the softened water is less than 90°.
[0011] As a preferred embodiment of the anti-corrosion and dosing method for the heating network of the present invention, negative pressure is formed at the contact position between the anti-corrosion agent and the softened water.
[0012] As a preferred embodiment of the anti-corrosion dosing method for the heating network of the present invention, the dosing pipe of the anti-corrosion agent is passed into the softening pipeline, and the angle between the discharge outlet of the dosing pipe and the flow direction of the softened water is less than 90°.
[0013] As a preferred solution of the anti-corrosion dosing method for the heating network of the present invention, the angle between the discharge outlet of the dosing pipe and the flow direction of the softened water is 0°.
[0014] As a preferred solution of the anti-corrosion dosing method for the heating network of the present invention, the discharge port of the dosing pipe shrinks inwardly along the discharge direction.
[0015] As a preferred embodiment of the anti-corrosion and dosing method for the heating network of the present invention, when the pH value of the mixed water inside the heating network pipeline is greater than 10, the heating network circulating water pump stops running immediately.
[0016] The beneficial effect of this method is that the anticorrosive agent is smoothly introduced into the softening pipe and fully mixed with the softened water, and then the mixed softened water is introduced into the heating network pipe to provide anticorrosion protection for the heating network pipe.
[0017] Another object of the present invention is to provide a method for adding medicine to a heating network to prevent corrosion, the purpose of which is to enable the antiseptic agent to be smoothly mixed with softened water.
[0018] In order to solve the above technical problems, the present invention provides the following technical solutions: a heat network anti-corrosion dosing device, comprising:
[0019] A mixing assembly, comprising a fresh water tank and a dosing tank, and a mixing pipe connected to the fresh water tank and the dosing tank;
[0020] The anti-corrosion component comprises a heat network deaerator, the heat network deaerator is connected to the mixing pipeline, and a heat network water supply pump is connected to the heat network deaerator.
[0021] As a preferred solution of the heat network anti-corrosion dosing device of the present invention, wherein: the mixing pipeline includes a softening pipeline between the fresh water tank and the heat network deaerator, and a dosing pipe arranged between the dosing tank and the softening pipeline;
[0022] The end of the dosing pipe extends into the softening pipe and is provided with a tapered nozzle.
[0023] The beneficial effects of the present invention are as follows: the antiseptic agent with lower pressure can be smoothly introduced into the softening pipe through the tapered nozzle to be mixed with softened water, thereby improving the mixing effect; and then the mixed softened water is introduced into the heating network pipe to provide antiseptic protection for the heating network pipe. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.
[0025] Figure 1 It is a schematic diagram of the overall structure of the heat network anti-corrosion and dosing method and device of the present invention.
[0026] Figure 2 This is a schematic diagram of the dosing pipe structure of the heat network anti-corrosion dosing device of the present invention. DETAILED DESCRIPTION
[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.
[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.
[0030] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.
[0031] Example 1, reference Figure 1 , which is the first embodiment of the present invention, provides a method for adding medicine to a heat network for corrosion prevention, the method comprising:
[0032] S1. Mixing by passing the preservative into the softening pipe 103a;
[0033] The dosing tube 103b is connected to the softening pipe 103a, and the preservative is introduced into the softening pipe 103a through the dosing tube 103b; when the preservative is introduced into the softening pipe 103a, its inflow direction is the same as the flow direction of the softened water in the softening pipe 103a, and the angle between the two is less than 90°, preferably 0°. At this time, the dosing tube 103b is horizontal to the softening pipe 103a, and the preservative can enter along the flow direction of the softened water, avoiding the preservative directly against the pressure of the softened water and being unable to smoothly enter the softened water pipe.
[0034] Among them, softened water is the water quality commonly used in the heating network system. It can effectively reduce calcium, magnesium and other ions in the water and avoid scaling. It also provides a basis for the transmission of preservatives.
[0035] Among them, the main cost of anti-corrosion agents includes alkaline agents. The pH value of the anti-corrosion agents after mixing with softened water is greater than 10. The alkaline agent can neutralize the acidic substances in the water and increase the pH value of the water to above 10, which significantly enhances the corrosion resistance of the heating network pipeline. At the same time, the alkaline environment can inhibit the oxidation reaction on the metal surface and reduce the occurrence of corrosion.
[0036] S2. The preservative is brought into the hot network deaerator 201 through softened water;
[0037] Among them, after the softened water and the preservative are mixed, they enter the heat network deaerator 201, which can further remove the dissolved oxygen in the water and improve the anti-corrosion performance of the water. In addition, the softened water and the preservative can be further mixed in the heat network deaerator 201 to improve the mixing effect and ensure the pH stability of the mixed softened water.
[0038] The heat network deaerator 201 effectively removes dissolved oxygen in water through physical methods such as high temperature and low pressure to prevent corrosion caused by oxygen. At the same time, by increasing the pH value of water and enhancing the alkaline environment, the corrosion reaction of metal pipes is further inhibited.
[0039] S3. The mixed softened water is passed into the heat network pipe for corrosion protection through the heat network feed water pump 202;
[0040] The mixed softened water is further mixed and deoxygenated in the heat network deaerator 201, and then introduced into the heat network pipeline through the heat network feed water pump 202 for corrosion prevention. The stable operation of the heat network feed water pump 202 ensures that the mixed water is evenly distributed in the pipeline, so that the effect of the anti-corrosion agent is fully exerted.
[0041] Among them, when the pH value of the mixed water inside the heating network pipeline reaches above 10, the heating network circulating water pump can stop running immediately to reduce electricity consumption; further, the pH value of the mixed water is monitored in real time by a pH value monitoring device (such as an online pH meter). When the set value is reached, the heating network circulating water pump is automatically controlled to stop running, ensuring that the system achieves the best anti-corrosion effect with the lowest energy consumption.
[0042] During use, the preservative is passed into softened water and enters the heating network deaerator 201 together with the softened water. After being fully mixed twice during transportation and deoxygenation, the preservative is finally added to the heating network pipeline through the heating network water supply pump 202, so that the pH value of the mixed water inside the heating network pipeline reaches above 10, thereby achieving anti-corrosion protection for the heating network pipeline.
[0043] Example 2, reference Figure 1 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: by passing the dosing pipe 103b of the preservative into the softening pipe 103a, the angle between the discharge outlet of the dosing pipe 103b and the flow direction of the softened water is less than 90°.
[0044] The end of the dosing tube 103b extends into the softening pipe 103a, and the angle between the discharge outlet direction of the dosing tube 103b and the flow direction of the softened water is less than 90°, and the preferred angle is 0°. At this time, the discharge direction of the preservative is consistent with the flow direction of the softened water.
[0045] Furthermore, negative pressure is formed at the contact point between the preservative and the softened water. Since the pressure inside the softened water pipe is relatively high, generally around 0.6 MPa, negative pressure is formed at the connection, which helps the preservative to smoothly enter the softened water pipe, wherein the discharge port of the dosing pipe 103b shrinks inward along the discharge square.
[0046] The shape of the discharge port of the dosing pipe 103b inside the softening pipe 103a is that the bottom area is larger than the area of the outlet end, and the discharge direction of the antiseptic agent at the discharge port is consistent with the flow direction of the softened water.
[0047] When the fluid flows in the tapered channel, the velocity will increase and the pressure will decrease. A negative pressure will be formed at the discharge port of the dosing tube 103b, which will attract the medicine in the dosing tube 103b to fully contact with the softened water, thereby achieving an efficient mixing effect.
[0048] The remaining structures are the same as those of Example 1.
[0049] During use, the preservative is passed into softened water and enters the heating network deaerator 201 together with the softened water. After being fully mixed twice during transportation and deoxygenation, the preservative is finally added to the heating network pipeline through the heating network water supply pump 202, so that the pH value of the mixed water inside the heating network pipeline reaches above 10, thereby achieving anti-corrosion protection for the heating network pipeline.
[0050] Example 3, reference Figure 1 and Figure 2 , which is the third embodiment of the present invention, provides a heat network anti-corrosion dosing device, which includes: a mixing component 100 and an anti-corrosion component 200.
[0051] The mixing assembly 100 includes a fresh water tank 101 and a dosing tank 102, and a mixing pipe 103 connected to the fresh water tank 101 and the dosing tank 102, wherein the fresh water tank 101 carries softened water, and the dosing tank 102 carries a preservative, and the softened water and the preservative can be pumped into the mixing pipe 103 respectively through a softened water pump 101a and a dosing pump 102a.
[0052] Among them, softened water is the commonly used water quality in the heating network system, which can effectively reduce calcium, magnesium and other ions in the water and avoid scaling. It also provides a basis for the transmission of preservatives. The main cost of preservatives includes alkaline agents. The pH value of the preservatives after mixing with softened water is greater than 10. Among them, alkaline agents can neutralize acidic substances in water and increase the pH value of water to above 10, significantly enhancing the corrosion resistance of heating network pipelines. At the same time, the alkaline environment can inhibit the oxidation reaction on the metal surface and reduce the occurrence of corrosion.
[0053] Furthermore, two dosing pumps 102a and two softening water pumps 101a are provided, one for backup and one for use, so that when one of them fails, the other can continue to work.
[0054] The anti-corrosion component 200 includes a heating network deaerator 201, which is connected to the mixing pipe 103, and a heating network water supply pump 202 connected to the heating network deaerator 201; wherein the anti-corrosion agent and softened water are contacted and mixed in the mixing pipe 103, and then introduced into the heating network deaerator 201 for deoxygenation, and finally added into the heating network pipeline through the heating network water supply pump 202 for anti-corrosion protection.
[0055] Among them, after the softened water and the preservative are mixed, they enter the heat network deaerator 201, which can further remove the dissolved oxygen in the water and improve the anti-corrosion performance of the water. In addition, the softened water and the preservative can be further mixed in the heat network deaerator 201 to improve the mixing effect and ensure the pH stability of the mixed softened water.
[0056] The heat network deaerator 201 effectively removes dissolved oxygen in water through physical methods such as high temperature and low pressure to prevent corrosion caused by oxygen. At the same time, by increasing the pH value of water and enhancing the alkaline environment, the corrosion reaction of metal pipes is further inhibited.
[0057] Furthermore, the mixing pipe 103 includes a softening pipe 103a between the fresh water tank 101 and the heat network deaerator 201, and a dosing pipe 103b arranged between the dosing tank 102 and the softening pipe 103a; the end of the dosing pipe 103b extends into the softening pipe 103a, and a tapered nozzle 103c is provided at the end.
[0058] The shape of the tapered nozzle 103c inside the softening pipe 103a is such that the bottom area is larger than the area of the outlet end, and the discharge direction of the preservative is consistent with the flow direction of the softened water.
[0059] When the fluid flows in the tapered channel, the velocity will increase and the pressure will decrease. A negative pressure will be formed at the tapered nozzle 103c, which will attract the medicine in the dosing tube 103b to fully contact with the softened water, thereby achieving an efficient mixing effect.
[0060] During use, the preservative and softened water are pumped into the mixing pipe 103 at the same time for mixing, and then enter the heating network deaerator 201 together with the softened water for mixing and deoxygenation, and finally replenished into the heating network pipeline through the heating network water replenishment pump 202, so that the pH value of the mixed water inside the heating network pipeline reaches above 10, thereby achieving anti-corrosion protection for the heating network pipeline.
[0061] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values (e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.
[0062] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.
[0063] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.
Claims
1. A method for adding medicine to a heating network for corrosion prevention, characterized in that: include, Mixing the preservative by passing it into a softening pipe (103a); Bringing the preservative into the hot network deaerator (201) through softened water; and, The mixed softened water is introduced into the heating network pipeline through the heating network water supply pump (202) for corrosion prevention.
2. The method for adding medicine to heat network anticorrosion according to claim 1, characterized in that: The main components of the preservative include alkaline agents, and the pH value of the preservative after mixing with softened water is greater than 10.
3. The method for adding medicine to the heat network for corrosion prevention according to claim 1 or 2, characterized in that: The angle between the direction in which the antiseptic agent is introduced into the softening pipe (103a) and the flow direction of the softened water is less than 90°.
4. The method for adding medicine to heat network anticorrosion according to claim 1 or 2, characterized in that: Negative pressure is formed at the contact point between the preservative and softened water.
5. The method for adding medicine to the heat network for corrosion prevention according to claim 4, characterized in that: By passing the dosing pipe (103b) of the antiseptic agent into the softening pipe (103a), the angle between the discharge outlet of the dosing pipe (103b) and the flow direction of the softened water is less than 90 degrees.
6. The method for adding medicine to heat network for corrosion prevention according to claim 5, characterized in that: The angle between the discharge outlet of the dosing pipe (103b) and the flow direction of the softened water is 0°.
7. The method for adding medicine to heat network for corrosion prevention according to claim 5 or 6, characterized in that: The drug discharging port of the drug adding pipe (103b) contracts inwardly along the drug discharging direction.
8. The method for adding medicine to heat network for corrosion prevention according to claim 2, characterized in that: When the pH value of the mixed water inside the heating network pipeline is greater than 10, the heating network circulating water pump will stop running immediately.
9. A heating network anti-corrosion and dosing device, used to perform a heating network anti-corrosion and dosing method as claimed in any one of claims 1 to 8, characterized in that: include; A mixing assembly (100), comprising a fresh water tank (101), a drug adding tank (102), and a mixing pipe (103) connected to the fresh water tank (101) and the drug adding tank (102); The anti-corrosion component (200) comprises a heating network deaerator (201), the heating network deaerator (201) being connected to the mixing pipe (103), and a heating network water supply pump (202) being connected to the heating network deaerator (201).
10. The anti-corrosion and dosing device for the heating network according to claim 9, characterized in that: The mixing pipe (103) comprises a softening pipe (103a) between the fresh water tank (101) and the heat network deaerator (201), and a dosing pipe (103b) arranged between the dosing tank (102) and the softening pipe (103a); the end of the dosing pipe (103b) extends into the softening pipe (103a), and a tapered nozzle (103c) is provided at the end.