Integrated heat pipe low-low-temperature electric dust remover

Abstract

The utility model discloses an integrated heat pipe low-temperature electric dust remover which comprises an electric dust remover body with an inlet end socket, a plurality of heat exchangers are arranged on the inlet end socket, and the heat absorption sides of the heat exchangers are located in the inlet end socket. The technical problems that a conventional low-temperature economizer leaks and a common heat pipe occupies a large area can be solved, and the purposes of reducing the size and investment cost of a conventional low-low-temperature electric dust remover and improving the efficiency of the electric dust remover are achieved.

Description

[Technical field]

[0001] The utility model relates to the technical field of flue gas pollutant treatment and electric dust removal, in particular to an integrated heat pipe low-temperature electric dust remover. [Background technology]

[0002] There are more than 3,000 electrostatic precipitators in the market, which are the mainstream equipment for industrial flue gas dust removal. They have the advantages of low pressure drop loss, no clogging, large flue gas processing volume, simple operation and maintenance, and high dust removal efficiency.

[0003] The dust removal equipment of my country's coal-fired power plants has mainly experienced a reduction from 50mg / m3 to 30mg / m3 around 2010, and then in 2014, as my country's coal-fired power plants reduced ultra-low emissions to 15-20mg / m3 at the outlet of the electrostatic precipitator (and then achieved a chimney outlet dust concentration of less than 10mg / m3 through downstream equipment). Low-temperature electrostatic precipitators have been widely used in China, and the dust concentration at the outlet of the electrostatic precipitator has reached less than 15mg / m3. A large number of low-temperature electrostatic precipitators in China have a history of nearly 10 years of application. With the passage of operating time, the flue gas cooler at the front end of the electrostatic precipitator has a large number of leakage problems due to the combined effects of wear and corrosion. Some power plants have dismantled the flue gas cooler and replaced the low-temperature electrostatic precipitator with an electrostatic precipitator, resulting in reduced energy-saving effects and fluctuations in the chimney outlet dust concentration, which made it impossible to stably meet the ultra-low emission requirements.

[0004] The frequency and magnitude of coal-fired power units participating in peak load regulation are increasing, and there is a strong demand for multi-coal type, variable load and ultra-low emission technologies.

[0005] In this context, the market urgently needs new electrostatic precipitator technologies with simple operation and maintenance, good transformation adaptability, strong load adaptability, low transformation cost and high dust removal efficiency, especially new low-temperature electrostatic precipitator technologies that can replace conventional low-temperature economizers. [Utility Model Content]

[0006] The purpose of the utility model is to solve the problems in the prior art and to propose an integrated heat pipe low-temperature electrostatic precipitator, which can solve the technical problems of leakage of conventional low-temperature economizers and large floor space occupied by ordinary heat pipes, thereby reducing the volume and investment cost of conventional low-temperature electrostatic precipitators and improving the efficiency of electrostatic precipitators.

[0007] To achieve the above objectives, the utility model proposes an integrated heat pipe low-temperature electrostatic precipitator, including an electrostatic precipitator body with an inlet head, on which a plurality of heat exchangers are arranged, and the heat absorption side of the heat exchanger is located in the inlet head.

[0008] Preferably, the heat exchanger is a heat pipe heat exchanger.

[0009] Preferably, the number of the heat exchangers is two groups, and the two groups of heat exchangers are symmetrically arranged on both sides of the inlet head relative to the central axis of the inlet head.

[0010] Preferably, the water flow direction of the heat exchanger is horizontal, flowing out toward both sides of the horizontal and vertical flue gas directions of the inlet head.

[0011] Preferably, the inlet cover is fixed on a flue support and an electrostatic precipitator support.

[0012] Beneficial effects of the utility model: the utility model is provided with a plurality of heat exchangers on the inlet head, and the heat absorption side of the heat exchanger is located inside the inlet head. Compared with the prior art, it can solve the technical problems of leakage of conventional low-temperature economizers and large floor space occupied by ordinary heat pipes, thereby achieving the purpose of reducing the volume and investment cost of conventional low-temperature electrostatic precipitators and improving the efficiency of electrostatic precipitators.

[0013] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0014] Figure 1 This is a structural schematic diagram of an integrated heat pipe low-temperature electrostatic precipitator of the utility model;

[0015] Figure 2 The utility model is a top view of an integrated heat pipe low-temperature electrostatic precipitator.

[0016] In the figure: 1-inlet head, 2-electrostatic precipitator body, 3-heat exchanger, 4-flue bracket, 5-electrostatic precipitator bracket. [Specific implementation method]

[0017] See also Figure 1 , 2 The utility model discloses an integrated heat pipe low-temperature electrostatic precipitator, comprising an electrostatic precipitator body 2 with an inlet head 1, the inlet head 1 is provided with a plurality of heat exchangers 3, the heat absorption side of the heat exchanger 3 is located in the inlet head 1, the heat exchanger 3 is a heat pipe heat exchanger, the number of the heat exchangers 3 is two groups, the two groups of heat exchangers 3 are symmetrically arranged on both sides of the inlet head 1 relative to the central axis of the inlet head 1, the water flow direction of the heat exchanger 3 is horizontal, and flows out on both sides of the horizontal and vertical flue gas directions of the inlet head 1, and the inlet head 1 is fixed on the flue bracket 4 and the electrostatic precipitator bracket 5.

[0018] Working process of this utility model:

[0019] The utility model discloses an integrated heat pipe low-temperature electrostatic precipitator. During operation, a plurality of heat exchangers 3 are arranged on an inlet head 1. The heat absorption side of the heat exchanger 3 is located inside the inlet head 1. Compared with the prior art, the technical problems of leakage of conventional low-temperature economizers and large floor space occupied by ordinary heat pipes can be solved, thereby achieving the purpose of reducing the volume and investment cost of conventional low-temperature electrostatic precipitators and improving the efficiency of the electrostatic precipitator.

[0020] A plurality of heat exchangers 3 are arranged on the inlet head 1, and the heat absorption side of the heat exchanger 3 is located inside the inlet head 1. Due to the large cross-sectional area and low flue gas velocity inside the inlet head 1, the flue gas dust has little wear on the heat exchange unit and the heat exchange efficiency is high; the heat exchange unit does not occupy other sites and there is no site requirement for the renovation project; the heat exchange unit does not require an independent shell and uses less steel; the heat exchange unit can also achieve the effect of flue gas flow equalization and can replace part of the guide vanes of the original electrostatic precipitator, having the advantages of good flow equalization effect, saving guide vanes and reducing costs.

[0021] There are two groups of heat exchangers 3, and the two groups of heat exchangers 3 are symmetrically arranged on both sides of the inlet head 1 relative to the central axis of the inlet head 1. The length of the heat exchange tube 3 is reduced, the resistance of the heat exchange medium is reduced, the heat exchange effect is good, and the pressure loss is low; the symmetrical arrangement is convenient for maintenance and repair; the heat exchange effect of the control system is highly controllable and has strong adaptability to the heat exchange of the coal-fired unit under low load conditions.

[0022] 1. The heat pipe is inside the electrostatic precipitator, with a large cross-sectional area and low flue gas flow rate, which solves the problem that conventional low-temperature economizers are prone to wear and leakage under high dust concentration and high flue gas flow rate (the lower the flue gas scouring speed, the less wear).

[0023] 2. By lowering the flue gas temperature, the flue gas dust resistivity is reduced, and the dust concentration at the outlet of the electrostatic precipitator can exceed 10mg / m 3 the following.

[0024] 3. It can meet the peak-shaving needs of coal-fired thermal power units, realize ultra-low dust emission technology under multiple coal types and variable loads, and meet the needs of electrostatic precipitator transformation.

[0025] 4. The heat pipe is inside the electrostatic precipitator, with a large cross-sectional area and low flue gas flow rate, which solves the problem of low heat exchange efficiency (low flow rate, long flue gas residence time, and good heat exchange effect). The equipment is small in size, has a low one-time investment cost, and high heat exchange efficiency.

[0026] 5. The heat pipe heat exchange unit is installed inside the electrostatic precipitator, which takes up little space and can meet the renovation projects with limited space. The heat pipe unit and the electrostatic precipitator are designed as one body, and the steel structure uses less steel.

[0027] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. An integrated heat pipe low-temperature electrostatic precipitator, characterized in that: The invention comprises an electrostatic precipitator body (2) having an inlet head (1), wherein a plurality of heat exchangers (3) are arranged on the inlet head (1), and the heat absorption side of the heat exchanger (3) is located inside the inlet head (1).

2. The integrated heat pipe low-temperature electrostatic precipitator according to claim 1, characterized in that: The heat exchanger (3) is a heat pipe heat exchanger.

3. The integrated heat pipe low-temperature electrostatic precipitator according to claim 2, characterized in that: The number of the heat exchangers (3) is two groups, and the two groups of heat exchangers (3) are symmetrically arranged on both sides of the inlet head (1) relative to the central axis of the inlet head (1).

4. The integrated heat pipe low-temperature electrostatic precipitator according to claim 3, characterized in that: The water flow direction of the heat exchanger (3) is horizontal, and flows out toward both sides of the inlet head (1) in the horizontal and vertical flue gas directions.

5. An integrated heat pipe low-temperature electrostatic precipitator according to any one of claims 1 to 4, characterized in that: The inlet cover (1) is fixed on a flue support (4) and an electrostatic precipitator support (5).

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