CN212538943U - Electrostatic water mist recovery system for circulating water cooling tower - Google Patents
Electrostatic water mist recovery system for circulating water cooling tower Download PDFInfo
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- CN212538943U CN212538943U CN202022138580.4U CN202022138580U CN212538943U CN 212538943 U CN212538943 U CN 212538943U CN 202022138580 U CN202022138580 U CN 202022138580U CN 212538943 U CN212538943 U CN 212538943U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 238000001816 cooling Methods 0.000 title claims abstract description 16
- 238000011084 recovery Methods 0.000 title claims abstract description 10
- 239000003595 mist Substances 0.000 title abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 31
- 229910052751 metal Inorganic materials 0.000 claims abstract description 31
- 239000000779 smoke Substances 0.000 claims abstract description 3
- 229910052755 nonmetal Inorganic materials 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims 1
- 239000011159 matrix material Substances 0.000 claims 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 abstract 5
- 235000017491 Bambusa tulda Nutrition 0.000 abstract 5
- 241001330002 Bambuseae Species 0.000 abstract 5
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- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
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- 239000004809 Teflon Substances 0.000 description 1
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- 230000000903 blocking effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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- 239000012212 insulator Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses an electrostatic water smoke recovery system for circulating water cooling tower is including receiving a water section of thick bamboo, discharge electrode, earthing pole, receive a water section of thick bamboo for there being not a top bottomless tubular structure, it is the air current entry end to receive water bottom of the section of thick bamboo, the discharge electrode is metal pole or wire, and the discharge electrode tip is located receives the inside central axis position directional air current entry end direction of a water section of thick bamboo, and the earthing pole is arranged in the air current entry end outside and is received between the water section of thick bamboo electrical insulation. The novel high-voltage electrostatic water mist collecting device is simple in structure, light in weight, high in water vapor collecting rate, stable in operation, low in investment and operation cost and good in economical efficiency.
Description
Technical Field
The invention relates to the field of high-voltage electrostatic water mist recovery, in particular to recovery of water mist above a circulating water cooling tower.
Background
In the fields of petrochemical industry, thermal power generation, papermaking, metallurgy and the like, a circulating cooling water system generally exists, a cooling tower is an important device in the circulating water system, circulating water is cooled through heat exchange between water and air, and recycling of cooling water is realized. During this process, the loss due to water evaporation is about 80% of the total make-up water; a large amount of humid air is discharged into the atmosphere, resulting not only in waste of water resources, but also in many environmental problems. Therefore, the recovery of the cooling tower vapor is of great significance to water conservation and air quality improvement. At present, a conventional method is to install a water eliminator, such as a multilayer metal grid, above a cooling tower, but only a small part of water vapor loss is blocked, and the problems of blocking an air flow channel, influencing heat exchange and the like exist. The reported electrostatic water collection imitates an electrostatic dust collection device, namely, a conductor such as a metal plate is directly used as a water collection polar plate to be connected with a power output grounding terminal, but the device has the defects of large working current density, unstable operation, easy power failure, high energy consumption, low water collection rate and the like when processing moisture such as water vapor and the like; in addition, the metal cylinder and the metal electrode material are easy to corrode in long-term operation, and the structural problems of the cooling tower, such as the bearing overrun and the like, are easy to cause due to the high density of the metal cylinder.
Disclosure of Invention
The novel high-voltage electrostatic water mist collecting device is simple in structure, light in weight, high in water vapor collecting rate, stable in operation, low in investment and operation cost and good in economical efficiency.
The technical scheme adopted by the invention is as follows: an electrostatic water mist collecting system is arranged at an outlet at the top end of a water cooling tower. The working system mainly comprises a high-voltage power supply system, a water collecting system, a frame and other auxiliary systems. The water collecting system comprises a water collecting cylinder, a discharge electrode (namely a discharge electrode) and a grounding electrode (namely a grounding electrode); the auxiliary system comprises a frame and an electrically insulating part; the water collecting system is characterized in that: the water collecting cylinder is a non-metal cylinder body with two open ends and is arranged in parallel with the direction of the air flow. The discharge electrode is a conductor such as a metal rod or a metal wire and is arranged at the center of the cylinder and points to the grounding electrode. The grounding electrode adopts a metal net or a metal rod, and the metal net is vertically arranged with the discharge electrode; when the grounding electrode is a metal rod, the discharge electrode is opposite to the end of the grounding electrode. As in fig. 1.
Furthermore, the water receiving cylinder is of a top-free and bottom-free cylindrical structure, the bottom of the water receiving cylinder is an airflow inlet end, the discharge electrode is a metal rod or a metal wire, the end part of the discharge electrode is positioned in the direction of the airflow inlet end at the position of the central axis in the water receiving cylinder, and the grounding electrode is positioned outside the airflow inlet end and is electrically insulated from the water receiving cylinder.
Further, the water collecting cylinder body is made of a non-metal material or a metal surface is coated with the non-metal material. The cylinder can also be made of conductive materials such as metal and the like, but the cylinder and the grounding electrode cannot be in direct contact at the moment. The surface of a metal rod or a metal wire of the discharge electrode is coated by an anticorrosive insulating material, and the end part of the metal rod or the metal wire is needle-shaped;
furthermore, the power supply range of the high-voltage source is 1-200kV, and both a direct-current power supply and an alternating-current power supply can be used; the output voltage of the direct current power supply can be positive or negative.
In the high-voltage electrostatic water collection system, the distance between the two electrodes is 1-50 cm. In the same water collecting cylinder, a plurality of discharge electrodes can be arranged at different heights to form a multi-stage collecting effect.
In the high-voltage electrostatic water collection system, the metal mesh grounding electrodes have different meshes.
According to the high-voltage electrostatic water collection system, the insulating cylinder body is used for providing sufficient impact condensation points for the fog drops, and the condensation of the water fog into large liquid drops is promoted to be collected. And effectively isolate the contact of two electrodes, avoid the short circuit, stability is high, and the operating current is little.
The strip-shaped groove is formed in the longitudinal axis direction of the inner wall of the water collecting barrel, so that the recovered water can flow along the groove, and the phenomenon that the recovered water is blown up again when the airflow is too large is avoided.
According to the high-voltage electrostatic water collecting system, the diameter and the length of the insulating cylinder can be selected according to specific working conditions.
In the high-voltage electrostatic water collection system, one cylinder is a small-unit water collection device and is arranged in the water mist channel in a honeycomb shape.
Above-mentioned high-voltage electrostatic water collection system to the very big device of fog volume, can realize the multilayer stack, accomplishes the abundant collection to the water smoke.
The invention has the beneficial effects that the collection of the evaporated water mist of the circulating water cooling tower is realized by adopting a more efficient and energy-saving high-voltage electrostatic technology, and the collection efficiency can reach more than 94%. In the system, the ionization discharge of the discharge electrode is utilized to charge the fog drops, so that the fog drops are subjected to motion deviation under the action of a high-voltage electric field. The insulating cylinder body is innovatively introduced to provide more sufficient impact condensation points for the fog drops, and the condensation of the water fog into large liquid drops to be collected is promoted. The contact between the two electrodes is effectively isolated, short circuit is avoided, the stability is improved, the operating voltage and the current are small, and the collection efficiency is greatly improved; the weight is light, and the corrosion problem of the metal cylinder and the electrode is avoided. The system has the advantages of simple structural design, low equipment and operation cost, stable operation, economy and applicability, and good application prospect.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1-circulating water cooling tower, 2-insulating support, 3-discharge electrode, 4-water collecting cylinder, 5-grounding electrode, 6-insulating box and 7-high voltage source.
Detailed Description
For a further understanding of the invention, reference is made to the following description taken in conjunction with the accompanying drawings and specific examples, in which:
as shown in figure 1, a novel high-voltage electrostatic water mist recovery device is arranged near the top outlet of a circulating water cooling tower 1. Mainly comprises an insulation box 6 fixed on the inner wall of the cooling tower, and a stainless steel net with a certain mesh number fixed on the upper side of the insulation box as a grounding electrode 5. In this example, the stainless steel mesh was selected to have good corrosion resistance. The cylindrical insulator water receiving cylinder 4 is arranged above the stainless steel net and is vertically arranged and closely arranged. In this embodiment a teflon cylinder is chosen. Discharge electrodes 3 are inserted into the center of the cylindrical body, respectively, and fixed to the insulating holders 2. In this embodiment, the discharge electrode is made of copper wire wrapped with an insulating layer, and only the end is exposed and polished to a tip. The discharge electrode 3 is connected in parallel in circuit with the output of the high voltage source. The output voltage of the high voltage source is negative.
When the invention is used, water mist caused by the circulating cooling of the water cooling tower enters the high-voltage electrostatic collecting device from bottom to top. High voltage of 1-200kV is generated between two electrodes by using a high voltage source, and corona effect is generated at the end of a discharge electrode under the high voltage to ionize air into positive and negative ions. Under the action of a high-intensity electric field, the positive ions and the negative ions rapidly move towards the electrode with opposite polarities, so that the fog drops carry charges; and breakdown is easy to occur between the two electrodes, and the device is unstable in operation. In order to overcome the defects, the water collecting cylinder insulated from the two poles is arranged between the two poles, fog drops are drawn to impact the wall surface of the insulating cylinder at a very high speed under the combined action of electric field force and wind power and flow along the inner surface of the cylinder to be collected after being condensed into large water drops, and under the condition of low energy consumption, the water drop charging space and path are increased, the collection rate is improved, and the running stability of the device is improved.
Example 1: the device is arranged on the top of a cooling water tower with a small evaporation capacity. The direct-current high-voltage source with the measuring range of 0-30kV is selected, the output voltage is positive, the discharge electrode is a copper wire with the diameter of 2mm, the grounding electrode is an 8-mesh stainless steel net, the distance between the two is 6cm, and the insulating cylinder is a polytetrafluoroethylene cylinder with the inner diameter D being 10 cm. The working parameters are as follows: the voltage is 15kV, the current value is 0.02mA, no visible white fog exists at the outlet, and the measured recovery rate of the water vapor can reach more than 90%. After long-time continuous operation of 120h, no electrode breakdown phenomenon occurs, the device operates stably, and the collection rate is stably kept above 90% in different time periods. When the electrode spacing is increased to 10cm, a similar effect is achieved, and the parameters are as follows: the voltage was 18kV and the current was 0.05mA, so that the power consumption was increased. When the electrode spacing is reduced to 2cm, breakdown easily occurs between the two electrodes.
Example 2: the device is arranged on the top of a cooling water tower with a large evaporation capacity. Selecting a direct-current high-voltage source with the measuring range of 0-100kV, wherein the output voltage is negative, the discharge electrode is a copper bar with the diameter of 6mm, and a tip with the diameter of 0.2mm is welded at the end part of the copper bar; the grounding electrode selects the same copper bar and tip as the discharge electrode, the discharge electrode and the grounding electrode except the tip are coated by a heat-shrinkable tube, and the distance between the tips is 20 cm; the insulating cylinder body is a regular hexagon cylinder body made of rubber, the side length is 7cm, and the insulating cylinder body is closely arranged to be honeycomb-shaped. The working parameters are as follows: the voltage is 30kV, the current value is 0.3mA, no visible white fog exists at an outlet, the recovery rate of the measured water vapor can reach 95%, and the operation is stable for a long time.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. As will be appreciated by those skilled in the art. The present invention is not limited to the above-described embodiments, which are described in the specification and drawings only for illustrating the principles of the present invention, but also various changes and modifications may be made therein without departing from the spirit and scope of the present invention as defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides an electrostatic water smoke recovery system for circulating water cooling tower which characterized in that: the water collecting cylinder is of a top-free and bottom-free cylindrical structure, the bottom of the water collecting cylinder is an airflow inlet end, the discharge electrode is a metal rod or a metal wire, the end part of the discharge electrode is located in the direction of the airflow inlet end at the position of a central axis inside the water collecting cylinder, and the grounding electrode is arranged on the outer side of the airflow inlet end and is electrically insulated from the water collecting cylinder.
2. The system of claim 1, wherein: the water collecting cylinder is made of a non-metal material or the inner surface of a metal matrix is coated with an insulating non-metal material.
3. The system of claim 1, wherein: the end part of the discharge electrode is needle-shaped, and the grounding electrode is a metal net or a metal needle.
4. The system of claim 1, wherein: the metal surface of the discharge electrode or the metal needle grounding electrode except the tip part is coated by an insulating anticorrosive material.
5. The system of claim 1, wherein: the metal rod of the discharge electrode is a straight rod or a spiral shape.
6. The system of claim 1, wherein: and a plurality of burs are arranged on the rod of the metal rod of the discharge electrode.
7. The system of claim 1, wherein: and a strip-shaped groove is formed in the inner wall of the water collecting barrel in the axial direction.
8. The system of claim 1, wherein: the system is connected in series in multiple stages.
9. The system of claim 1, wherein: the cross section of the water collecting cylinder is circular, triangular, rectangular or polygonal.
10. The system of claim 1, wherein: the discharge electrode and the grounding electrode are respectively connected with a high-voltage power supply, and the high-voltage power supply is a direct-current power supply or an alternating-current power supply; the voltage of the output end of the direct current power supply is positive or negative, the other end of the direct current power supply is grounded, and the working voltage range is 1-200 kV.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022138580.4U CN212538943U (en) | 2020-09-25 | 2020-09-25 | Electrostatic water mist recovery system for circulating water cooling tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022138580.4U CN212538943U (en) | 2020-09-25 | 2020-09-25 | Electrostatic water mist recovery system for circulating water cooling tower |
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| CN212538943U true CN212538943U (en) | 2021-02-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112129157A (en) * | 2020-09-25 | 2020-12-25 | 大连理工大学 | Electrostatic water mist recovery system for circulating water cooling tower |
| CN114234672A (en) * | 2021-12-03 | 2022-03-25 | 安徽泛泽环境科技有限公司 | Plasma electric field water collecting part of cooling tower and application thereof |
-
2020
- 2020-09-25 CN CN202022138580.4U patent/CN212538943U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112129157A (en) * | 2020-09-25 | 2020-12-25 | 大连理工大学 | Electrostatic water mist recovery system for circulating water cooling tower |
| CN114234672A (en) * | 2021-12-03 | 2022-03-25 | 安徽泛泽环境科技有限公司 | Plasma electric field water collecting part of cooling tower and application thereof |
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