Circulating water flow velocity amplifying system
By designing a flow rate amplifier based on the Laval pipe principle in the circulating water system, the circulating water flow rate is improved, and the scaling problem caused by insufficient flow rate in the circulating water system is solved, achieving low cost, environmental protection and energy-saving effects.
Patent Information
- Application Number
- CN202411960782.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-04-25
AI Technical Summary
In circulating water systems in water-deficient and arid areas, insufficient flow rate of circulating water leads to a high tendency to scale, affecting heat exchange efficiency. The prior art pharmaceutical control and electrochemical descaling methods have high costs and complex management problems.
Design a circulating water flow rate amplification system based on the principle of Laval pipe. By setting up a flow rate amplifier for centralized pipe, buffer pipe and amplifier pipe, the circulating water flow rate is increased to 1.5-2 times the original. It is used in conjunction with any scale-proofing process, and there is no need to modify the existing system or increase energy consumption.
It has achieved a stable increase in the circulating water flow rate, reduced the tendency to scale, simplified the process flow, reduced operating costs, and no pollution and energy saving.
Smart Images
Figure CN119879620A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of industrial circulating water treatment and relates to a circulating water flow rate amplification system. Background Art
[0002] The principle of the circulating water system is simple. The medium is divided into two parts, the internal and external, through the heat exchanger. The external medium is usually the heat exchange medium, and most of the heat exchange medium is water. The internal medium is usually various materials or products in the production process of the enterprise. Water is circulated in the system through a circulating pump, and the heat of the internal medium is exchanged through the heat exchanger, so that the internal medium can be reduced to the temperature allowed by the production. The water exchanges heat with the outside through the heat exchange tower to keep the system water temperature in a balanced state, with good heat exchange efficiency.
[0003] In the water-scarce and arid areas of central and western China, circulating water systems usually have the following problems: 1. The hardness and alkalinity of circulating water are high, and the scaling problem of heat exchanger is serious, which affects the heat exchange efficiency.
[0004] 2. In hot seasons, the evaporation of circulating water is large and the concentration rate of circulating water is high.
[0005] 3. In order to achieve the purpose of water conservation, the frequency of circulating water replenishment and drainage is low, and the concentration multiple is usually high (3-5 times), which further increases the tendency of scaling.
[0006] The market usually solves the problem of scaling in circulating water by adding scale inhibitors and dispersants, or by electrochemical descaling. The advantage of using chemicals to control the scaling problem in circulating water is that it is convenient for daily operation and has a good control effect, but the system is sensitive to the effective concentration index of the chemical. If management is neglected, it may be counterproductive and fail to work. The electrochemical descaling method has the characteristics of high descaling efficiency and stable system operation, but the installation of facilities requires a one-time investment of a large amount of funds, and the subsequent replacement of consumables in the equipment (cathode rod) also requires a lot of costs.
[0007] According to existing research, as the flow rate of circulating water increases, the scaling tendency of the system will decrease accordingly. The basic principle is that under high flow rates, the crystal grains and adhesion ability of calcium carbonate crystals will decrease, and even if scaling problems occur, it is easy to clean and maintain; when the system flow rate is low, the adhesion ability of calcium carbonate crystals increases, the crystal grains are dense and difficult to remove, so how to increase the flow rate of circulating water is the key to solving the scaling problem of circulating water in the market.
[0008] In view of this, the present invention is proposed. Summary of the invention
[0009] The purpose of the present invention is to provide a circulating water flow rate amplification system. By setting a flow rate amplifier based on the Laval tube principle, it can be well used in conjunction with any scale inhibition process, and does not conflict with chemical control or electrochemical control of scaling. It does not require the modification of the existing circulating water system and the investment of additional energy to amplify the liquid flow rate. The flow rate amplifier can stably increase the circulating water flow rate to 1.5-2 times the original value. The use of the flow rate amplifier can make the process flow simple, the operating cost lower, pollution-free and energy-saving.
[0010] In order to achieve the above-mentioned purpose of the present invention, the following technical solutions are particularly adopted: A circulating water flow rate amplification system comprises a booster pump, a flow rate amplifier, a plate heat exchanger and a cooling box connected in sequence; wherein the flow rate amplifier comprises a concentrating pipe, a buffer pipe and an amplifying pipe connected in sequence; the length ratio between the concentrating pipe, the buffer pipe and the amplifying pipe is 1:3:2.
[0011] Preferably, as a further implementable solution, the concentrating tube and the amplifying tube are both hollow truncated cones, one end of the buffer tube is connected to the circular surface with a smaller top area of the concentrating tube, and the other end of the buffer tube is connected to the circular surface with a smaller top area of the amplifying tube.
[0012] Preferably, as a further implementable solution, the ratio of the radius of the circle with a smaller top area to the circle with a larger bottom area of the concentrating tube and the amplifying tube is 1:2.
[0013] Preferably, as a further feasible solution, the buffer tube is a cylinder with a hollow interior.
[0014] Preferably, as a further feasible solution, the joints between the buffer tube, the concentrator tube and the amplifier tube are all configured as gentle elbows.
[0015] In the present invention, a circulating water flow rate amplification device based on the Laval tube principle is designed, which is mainly composed of a concentrating tube, a buffer tube and an amplifying tube, wherein the concentrating tube and the amplifying tube are both hollow truncated cones, and the buffer tube is a hollow cylinder. The tops of the concentrating tube and the amplifying tube are circular surfaces with smaller areas, and the bottoms are circular surfaces with larger areas. The circular surfaces with smaller areas in the concentrating tube and the amplifying tube are fixedly connected to both ends of the buffer tube. The concentrating tube, the buffer tube and the amplifying tube are connected in sequence so that the circulating water will first be contracted by the concentrating tube when passing through the flow rate amplifier. At this time, since the cross-section of the concentrating tube becomes smaller, the cross-section of the circulating water suddenly becomes smaller when passing through the initial section of the concentrating tube, so that the flow rate of the circulating water will increase when the circulating water flows into the concentrating tube, and the water flow rate is the largest at the end of the concentrating tube, and then the accelerated circulating water enters the buffer tube. At this time, in the present invention, a buffer tube is set at the junction of the buffer tube and the concentrating tube. In the form of a gentle elbow, the flow rate of the accelerated circulating water will not be affected when it leaves the concentrating pipe and flows into the buffer pipe. At this time, the accelerated circulating water travels in the buffer pipe. At this time, the flow rate of the circulating water will gradually remain stable when traveling in the buffer pipe, so as to avoid affecting the scale inhibition effect due to uneven flow rate. Then, after passing through the buffer pipe, the flow rate of the circulating water is maintained at a stable rate and enters the amplifier pipe. At this time, although the pipe cross-section of the amplifier pipe gradually increases, the circulating water maintains a stable rate after passing through the buffer pipe, and then the flow rate of the circulating water is further improved after passing through the amplifier pipe. Therefore, even if the pipe cross-section of the amplifier pipe gradually increases, the rate of the circulating water will not decrease. This is because when the circulating water is moving, the larger the cross-section, the faster the flow rate. Therefore, for the present invention, after the circulating water is processed by the flow rate amplifier based on the Laval tube principle, its flow rate can be stably increased to 1.5-2 times the original.
[0016] Therefore, it can be known that in the present invention, the ratio of the lengths of the concentrating tube, the buffer tube and the amplifier tube and the ratio of the radius of the top and bottom cross sections of the concentrating tube and the amplifier tube are particularly important. This is because in the present invention, the amplification of the circulating water flow rate is mainly achieved by adjusting the radius ratio between the top and bottom of the concentrating tube and the amplifier tube, and the buffer tube is also provided so that the flow rate of the circulating water can be kept stable to avoid affecting the service life of the flow amplifier due to uneven flow rate. When the ratio of the lengths of the concentrating tube, the buffer tube and the amplifier tube is 1:3:2, the effect of improving the circulating water flow rate is excellent. This is because when the ratio of the lengths of the concentrating tube, the buffer tube and the amplifier tube is 1:3:2 and the ratio of the radius of the circle with a smaller top area to the circle with a larger bottom area of the concentrating tube and the amplifier tube is 1:2, when the circulating water first passes through the concentrating tube, the cross-sectional area of the concentrating tube suddenly decreases and the length is short. At this time, the circulating water is violently accelerated in the concentrating tube, but because the length of the concentrating tube is short, at this time The circulating water that moves forward violently in the concentrating pipe is prone to unstable velocity, thus affecting the subsequent lifting effect. Therefore, in order to avoid this situation, the present invention sets a buffer pipe between the concentrating pipe and the amplifying pipe, and the ratio of the length of the buffer pipe to the concentrating pipe and the amplifying pipe is 3:1:2, so that the circulating water can maintain a stable and uniform velocity in the buffer pipe to reach the amplifying pipe after the velocity is increased through the concentrating pipe, and then the circulating water can be increased to a stable velocity after being processed in the amplifying pipe; and the ratio of the radius of the circle with a smaller top area to the circle with a larger bottom area of the concentrating pipe and the amplifying pipe is 1:2 in order to better improve the flow rate of the circulating water. This is because when the circulating water passes through the concentrating pipe, if the ratio of the radius of the cross-sectional circle at the top of the concentrating pipe to the radius of the cross-sectional circle at the bottom of the concentrating pipe is too large, the velocity increase of the circulating water in the concentrating pipe will be affected, resulting in the inability to increase the circulating water to a sufficient flow rate; and if the radius ratio is too small, the flow rate of the circulating water will be reduced when passing through the flow rate amplifier.
[0017] Preferably, as a further feasible solution, a plurality of dosing systems are arranged in the cooling box. In the present invention, a plurality of dosing systems are arranged in the cooling box. Through the joint action of the dosing system and the flow rate amplifier, the scale inhibition effect in the system is excellent. In addition, since the flow rate amplifier is introduced into the system, the amount of chemical reagents used in the dosing system is reduced while achieving a higher scale inhibition effect.
[0018] Preferably, as a further implementable solution, a circulation pipeline is provided between the boost pump and the cooling box for realizing circulating water inlet of the system.
[0019] Preferably, as a further implementable solution, flanges are provided between the booster pump and the flow amplifier, and between the flow amplifier and the plate heat exchanger.
[0020] In the present invention, the flow rate amplifier is introduced into the circulating water system by using a flange, and the flange connection makes the circulating water system easier to install, and the flow rate amplifier can be installed at any part of the circulating water system according to needs.
[0021] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention provides a circulating water flow rate amplification system. By setting a flow rate amplifier based on the Laval tube principle, it can be well used in conjunction with any scale inhibition process, and does not conflict with chemical control or electrochemical control of scaling. It does not require the modification of the existing circulating water system or the investment of additional energy to amplify the liquid flow rate. The flow rate amplifier can stably increase the circulating water flow rate to 1.5-2 times the original. The use of the flow rate amplifier can make the process flow simple, the operating cost lower, pollution-free and energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a structural diagram of a circulating water flow rate amplification system of the present invention; Figure 2 It is a structural diagram of the flow rate amplifier of the present invention.
[0023] 1. Flow amplifier; 2. Plate heat exchanger; 3. Cooling box; 4. Booster pump; 5. Circulation pipeline. DETAILED DESCRIPTION
[0024] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but those skilled in the art will understand that the embodiments described below are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to illustrate the present invention, and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
[0025] In the description of the present invention, it is necessary to understand that the terms "top", "bottom", "inside", "side wall" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.
[0026] In order to more clearly explain the technical solution of the present invention, it is described in the form of specific embodiments below.
[0027] Example 1 First, simulate the circulating water system, with a water volume of 20m³, a circulating water volume of 200m³ / h, a flow rate of 200m³ / h, hot steam as the heat exchange medium, a control system temperature difference of 10°C, and a plate heat exchanger. Prepare simulated high-concentration circulating water (chloride ion 450mg / L. Total hardness 800mg / L, total alkalinity 600mg / L, Ph8.8); See also Figure 1 In the present invention, a circulating water flow rate amplification system mainly includes 1. a flow rate amplifier; 2. a plate heat exchanger; 3. a cooling box; 4. a booster pump; and 5. a circulating pipeline.
[0028] Specifically, the whole system includes a flow rate amplifier 1, a plate heat exchanger 2, a cooling box 3 and a booster pump 4; Specifically, a circulation pipeline 5 is provided between the booster pump 4 and the cooling box 3, and a dosing system is provided in the cooling box 3; Specifically, in the flow rate amplifier 1 of the system, the concentrator and the amplifier are both configured as hollow truncated cones, the buffer tube is configured as a cylinder, the length ratio of the concentrator, the buffer and the amplifier is 1:3:2, and the ratio of the circle radius of the top and bottom of the amplifier and concentrator is 1:2; The specific operation process of the circulating water system is as follows: Circulating water is introduced, and the circulating water increases its flow rate through the flow amplifier 1, then exchanges heat through the plate heat exchanger 2, and then flows into the cooling box 3, where it is descaled by chemical agents. Then the booster pump 4 will reintroduce the water flow into the flow amplifier 1 through the circulation pipe 5, and the cycle is repeated to prevent scale.
[0029] Example 2 The specific implementation method is consistent with Example 1, except that the length ratio between the concentrating tube, the buffer tube and the amplifying tube is adjusted to 1:2:2.
[0030] Example 3 The specific implementation method is consistent with Example 1, except that the length ratio between the concentrating tube, the buffer tube and the amplifying tube is adjusted to 1:1:1.
[0031] Example 4 The specific implementation method is consistent with Example 1, except that the ratio of the circle radius of the top and bottom of the amplifying tube and the concentrating tube is adjusted to 1:5.
[0032] Comparative Example 1 The specific implementation method is consistent with Example 1, except that no dosing system is provided in the cooling box and no flow rate amplifier is installed in the system.
[0033] Comparative Example 2 The specific implementation is consistent with Example 1, except that the flow rate amplifier is not used in the system.
[0034] Comparative Example 3 The specific real-time method is consistent with that in Example 1, except that no dosing system is provided in the cooling box.
[0035] The heat exchange efficiency and flow rate in Examples 1-7 are shown in Table 1 below
[0036] Therefore, by comparing Example 1 with Comparative Examples 1-3, it can be known that in the present invention, a circulating water flow rate amplification device based on the Laval tube principle is mainly designed, which is mainly composed of a concentrating tube, a buffer tube and an amplifying tube, wherein the concentrating tube and the amplifying tube are both hollow truncated cones, and the buffer tube is a hollow cylinder. The tops of the concentrating tube and the amplifying tube are circular surfaces with smaller areas, and the bottoms are circular surfaces with larger areas. The circular surfaces with smaller areas in the concentrating tube and the amplifying tube are fixedly connected to both ends of the buffer tube. The concentrating tube, the buffer tube and the amplifying tube are connected in sequence so that the circulating water will first be contracted by the concentrating tube when passing through the flow rate amplifier. At this time, since the cross-section of the concentrating tube becomes smaller, the circulating water will suddenly become smaller when passing through the initial section of the concentrating tube, so that the flow rate of the circulating water will increase when flowing into the concentrating tube, and the water flow rate is the largest at the end of the concentrating tube, and then the accelerated circulating water enters the buffer tube. At this time, in the present invention, by connecting the buffer tube and the amplifying tube, the circulating water will be contracted by the concentrating tube. The junction of the two concentrating pipes is arranged in the form of a gentle elbow, so that the flow rate of the accelerated circulating water will not be affected when it leaves the concentrating pipe and flows into the buffer pipe. At this time, the accelerated circulating water travels in the buffer pipe. At this time, the flow rate of the circulating water will gradually remain stable when traveling in the buffer pipe, so as to avoid affecting the scale inhibition effect due to uneven flow rate. Then, after passing through the buffer pipe, the flow rate of the circulating water is maintained at a stable rate and enters the amplifier pipe. At this time, although the pipe cross-section of the amplifier pipe gradually increases, the circulating water maintains a stable rate after passing through the buffer pipe, and then the flow rate of the circulating water is further improved after passing through the amplifier pipe. Therefore, even if the pipe cross-section of the amplifier pipe gradually increases, the rate of the circulating water will not decrease. This is because when the circulating water is moving, the larger the cross-section, the faster the flow rate. Therefore, for the present invention, after the circulating water is processed by the flow rate amplifier based on the Laval tube principle, its flow rate can be stably increased to 1.5-2 times the original.
[0037] By comparing Examples 1-4, it can be known that the length ratio between the concentrating tube, the buffer tube and the amplifier tube in the flow rate amplifier and the ratio of the radius of the top and bottom sections of the concentrating tube and the amplifier tube are particularly important. This is because in the present invention, the amplification of the circulating water flow rate is mainly achieved by adjusting the radius ratio between the top and bottom of the concentrating tube and the amplifier tube, and the buffer tube is also provided so that the flow rate of the circulating water can be kept stable to avoid affecting the service life of the flow rate amplifier due to uneven flow rate. When the length ratio between the concentrating tube, the buffer tube and the amplifier tube is 1:3:2, the effect of improving the circulating water flow rate is excellent. This is because when the length ratio between the concentrating tube, the buffer tube and the amplifier tube is 1:3:2 and the top area of the concentrating tube and the amplifier tube is small When the ratio of the radius of the circle with the larger bottom area to that of the circle with the larger bottom area is 1:2, when the circulating water first passes through the concentrating pipe, the cross-sectional area of the concentrating pipe suddenly decreases and the length is short, so the circulating water is accelerated violently in the concentrating pipe. However, since the length of the concentrating pipe is relatively short, the circulating water violently advancing in the concentrating pipe is prone to have an unstable rate, thereby affecting the subsequent lifting effect. In order to avoid this situation, the present invention provides a buffer pipe between the concentrating pipe and the amplifying pipe, and the ratio of the length of the buffer pipe to that of the concentrating pipe and the amplifying pipe is 3:1:2, so that the circulating water can maintain a stable and uniform rate in the buffer pipe to reach the amplifying pipe after the rate is lifted by the concentrating pipe, and then the circulating water can be lifted to a stable rate through the treatment of the amplifying pipe.
[0038] Finally, 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A circulating water flow rate amplification system, characterized in that: It comprises a booster pump, a flow rate amplifier, a plate heat exchanger and a cooling box connected in sequence; wherein the flow rate amplifier comprises a concentrating pipe, a buffer pipe and an amplifying pipe connected in sequence; and the length ratio of the concentrating pipe, the buffer pipe and the amplifying pipe is 1:3:
2.
2. The circulating water flow rate amplification device according to claim 1, characterized in that: The concentrating tube and the amplifying tube are both hollow truncated cones. One end of the buffer tube is connected to the circular surface with a smaller top area of the concentrating tube, and the other end of the buffer tube is connected to the circular surface with a smaller top area of the amplifying tube.
3. The circulating water flow rate amplification device according to claim 2, characterized in that: The ratio of the radius of the circle with a smaller top area to the circle with a larger bottom area of the concentrating tube and the amplifying tube is 1:
2.
4. The circulating water flow rate amplification system according to claim 1, characterized in that: The buffer tube is a cylinder with a hollow interior.
5. The circulating water flow rate amplification system according to claim 2, characterized in that: The joints between the buffer tube, the concentrator tube and the amplifying tube are all arranged as gentle elbows.
6. The circulating water flow rate amplification system according to claim 1, characterized in that: A plurality of dosing systems are arranged in the cooling box.
7. The circulating water flow rate amplification system according to claim 1, characterized in that: A circulation pipeline is provided between the booster pump and the cooling box to realize circulating water inflow to the system.
8. The circulating water flow rate amplification system according to claim 1, characterized in that: Flanges are arranged between the booster pump and the flow rate amplifier, and between the flow rate amplifier and the plate heat exchanger.