CN110354993A - A kind of residual-heat used type electric dust separator - Google Patents

Abstract

The invention discloses an electric precipitator utilizing waste heat, which comprises a housing, one end of the housing is provided with an air inlet bell mouth, the other end of the housing is provided with an air outlet bell mouth; the housing is provided with The anode plates arranged in rows and columns are provided with cathode wires corresponding to the position of each anode plate; each anode plate is equipped with serpentine heat exchange tubes; above the shell is provided with multiple headers, each The two ends of the header are connected to a water inlet respectively, and the other end of each header is connected to a water outlet. Each header is provided with a water inlet and a water outlet; in the same header, the water inlet and One end of a serpentine heat exchange tube is connected, and the water outlet is connected with the other end of the serpentine heat exchange tube. Adopting the invention can not only reduce the specific resistance of dust particles and improve the dust removal efficiency, but also can make full use of the residual heat of flue gas at the tail of the boiler, which is energy-saving and environment-friendly.

Description

A Waste Heat Utilization Electrostatic Precipitator

technical field

The invention belongs to the technical field of electric dust removal, and in particular relates to an electric dust collector with waste heat recovery function.

Background technique

At this stage, many existing industrial boilers in our country still have problems such as excessively high harmful gas content in the exhausted flue gas, excessively high discharge temperature, too much underutilized heat discharge, and a large number of fine particles. Energy conservation and environmental protection have become an inevitable requirement for industrial development. Energy conservation plays an irreplaceable role in my country's increasingly tense energy situation. The recycling and reuse of industrial waste heat is of great practical significance to alleviate the environmental pollution caused by industrial development. Therefore, from the perspective of environmental protection and energy saving, it is necessary to combine the dust collector and heat exchanger to achieve dust removal and heat exchange for flue gas.

Contents of the invention

In view of the above prior art, the present invention proposes a waste heat utilization type electric dust collector, which is an integrated structure of heat exchange and dust removal, which can not only improve the utilization of waste heat of flue gas, but also the heat exchange part will promote the improvement of the dust removal efficiency of the dust collector, and the dust removal part It will also improve the heat exchange efficiency of the heat exchange part, and achieve the purpose of mutual unification and mutual promotion of the two.

In order to solve the above technical problems, the present invention proposes a waste heat utilization type electrostatic precipitator, which includes a housing, one end of the housing is provided with an air inlet bell mouth, and the other end of the housing is provided with an air outlet bell mouth; The housing is provided with anode plates arranged in rows and columns, and cathode wires are provided corresponding to the position of each anode plate; each anode plate is provided with serpentine heat exchange tubes; the upper part of the housing is provided with multiple Two headers, one water inlet tank runs through the two ends of each header respectively, and the other end of each header connects with a water outlet tank, and each header is provided with a water inlet and a water outlet; in the same header , the water inlet communicates with one end of a serpentine heat exchange tube, and the water outlet communicates with the other end of the serpentine heat exchange tube.

Further speaking, the number of the headers is the same as the number of the serpentine heat exchange tubes.

An airflow distribution plate is provided in the middle of the channel where the air inlet bell mouth communicates with the housing.

The water inlet box is connected with one end of a water inlet pipe, and a water pump is installed at the other end of the water inlet pipe.

The outer surface of the shell is covered with skin and heat insulating material.

The shell of the anode plate is made of vinyl resin conductive glass.

The cathode wire is a rigid prickly wire made of 2205 stainless steel.

The bottom of the housing is provided with an ash hopper.

Compared with prior art, the beneficial effect of the present invention is:

Using the dust collector of the present invention, when the flue gas enters the casing, it passes through the airflow distribution plate arranged in the air inlet bell mouth, so that the flue gas can be evenly dispersed, avoiding severe local wear of the dust removal cavity, and improving the dust removal efficiency. When the dust collector of the present invention feeds water, it enters the header from the water inlet tank, and then enters the serpentine heat exchange tube in the anode plate from the header, which increases the heat exchange between the flue gas and the anode plate, and can not only improve the efficiency of the flue gas. Waste heat utilization, and because of the temperature difference, the dust particles in the electrostatic precipitator will flow from the high temperature area to the low temperature area, which will promote the dust collection of the anode plate. resistance, thereby effectively suppressing the back corona phenomenon. The invention can effectively improve the utilization of waste heat of the flue gas, reduce the exhaust gas temperature in the electric precipitator, slow down the flow of the flue gas, reduce the secondary dust, improve the dust removal efficiency of the electric precipitator, effectively save energy, and is energy-saving and environment-friendly.

When the present invention is used for dust removal of industrial boiler flue gas, the residual heat of flue gas can be fully utilized, which not only improves the dust removal efficiency of the electric dust collector, but also effectively saves energy and is energy-saving and environment-friendly.

Description of drawings

Fig. 1 is a schematic diagram of the shell structure of the waste heat utilization type electrostatic precipitator of the present invention;

Fig. 2 is a schematic diagram of the internal structure of the electrostatic precipitator shown in Fig. 1;

Fig. 3 is a schematic diagram of the connection of the water system inside the anode plate in the electrostatic precipitator shown in Fig. 1 .

In the figure: 1—housing; 2—air inlet bell mouth; 3—air outlet bell mouth, 4—air distribution plate; 5—header, 51—water inlet, 52—water outlet, 6—anode plate; 7— Cathode line; 8—ash hopper; 9—water inlet tank; 10—water outlet tank; 11—serpentine heat exchange tube.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the following embodiments in no way limit the present invention.

A waste heat utilization type electric precipitator proposed by the present invention, as shown in Figure 1, the electric precipitator includes a housing 1, one end of the housing 1 is provided with an air inlet bell mouth 2, and the air inlet bell mouth 2 An air flow distribution plate 4 is provided in the middle of the channel communicating with the housing 1 , and an air outlet bell mouth 3 is provided at the other end of the housing 1 . The outer surface of the housing 1 is covered with skin and heat insulating material.

The housing 1 is provided with anode plates 6 arranged in rows and columns, and the shell of the anode plates 6 is made of vinyl resin conductive glass. As shown in FIG. 2 , a cathode wire 7 is provided in one-to-one correspondence with each anode plate 6 , and the cathode wire 7 is a rigid prickly wire made of 2205 stainless steel. As shown in Figure 3, a serpentine heat exchange tube 11 is provided in each anode plate 6; a plurality of headers 5 are arranged above the housing 1, and the number of headers 5 is the same as that of the serpentine heat exchanger. The number of pipes 11 is the same, and the two ends of each header 5 are respectively connected with a water inlet box 9, and the water inlet box 9 is connected with one end of a water inlet pipe (that is, each header 5 is connected to the snake in the anode plate 6). Shaped heat exchange tubes 11 are connected in series), and a water pump is installed at the other end of the water inlet tube. The other end of each header 5 communicates with a water outlet tank 10, and each header 5 is provided with a water inlet 51 and a water outlet 52; in the same header 5, the water inlet 51 exchanges heat with a serpentine One end of the tube 11 is connected, and the water outlet 52 is connected with the other end of the serpentine heat exchange tube 11 . During use, the bottom inside the casing 1 is a low temperature zone, and an ash hopper 8 is arranged in the low temperature zone.

The cathode wire in the present invention is a rigid burr wire made of 2205 stainless steel, and the corona discharge generates an electric field that will enhance heat transfer. This is mainly because the electric field force acts on the charged dust particles and other charged particles to impact and disturb the heat transfer boundary of the anode plate. The thickness of the heat exchange boundary layer of the anode plate is thinned, thereby enhancing the heat transfer.

Taking the dust removal of the electric dust collector of the present invention for industrial boiler flue gas as an example, the working process of the electric dust collector of the present invention is that the feed water is first sent to the water inlet tank above the shell of the electric dust collector by the centrifugal pump, and then passed through the header 5 Flowing into the serpentine heat exchange tube 11 arranged in the anode plate 6, convective heat exchange and heat radiation are performed under the high-temperature flue gas, which greatly reduces the temperature near the anode plate 6, reduces the specific resistance of dust, and is beneficial to the adsorption of dust. The dust removal efficiency is improved, and at the same time, the feed water is heated and flows into the water outlet tank 10 through the header 5, and then the hot water is sent to the hot water pipe network, making full use of the residual heat of the flue gas. Adopting the invention can not only reduce the specific resistance of dust particles and improve the dust removal efficiency, but also can make full use of the residual heat of flue gas at the tail of the boiler, which is energy-saving and environment-friendly.

Although the present invention has been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative, rather than restrictive. Under the enlightenment of the present invention, many modifications can be made without departing from the gist of the present invention, and these all belong to the protection of the present invention.

Claims (8)

1. one end of a kind of residual-heat used type electric dust separator, including shell (1), the shell (1) is equipped with air inlet horn mouth (2), The other end of the shell (1) is equipped with air outlet bell mouth (3)；It is characterized by:

It is equipped with the anode plate (6) according to column-row arrangement in the shell (1), corresponds and is equipped with each anode plate (6) position Cathode line (7)；Snakelike heat exchange tube (11) are equipped in each anode plate (6)；

The top of the shell (1) is equipped with multiple headers (5), both ends difference one inlet tank (9) perforation of each header (5), often The other end and a water tank (10) of a header (5) penetrate through, and each header (5) is equipped with a water inlet (51) and water outlet (52)；In the same header (5), one end of the water inlet (51) and a snakelike heat exchange tube (11) is penetrated through, the water outlet (52) it is penetrated through with the other end of the snakelike heat exchange tube (11).

2. residual-heat used type electric dust separator according to claim 1, which is characterized in that the number of the header (5) with it is snakelike The number of heat exchanger tube (11) is identical.

3. residual-heat used type electric dust separator according to claim 1, which is characterized in that the air inlet horn mouth (2) with it is described The channel middle that shell (1) communicates is equipped with airflow-distribution board (4).

4. residual-heat used type electric dust separator according to claim 1, which is characterized in that the inlet tank (9) and a water inlet pipe One end be connected, the other end of the water inlet pipe is equipped with water pump.

5. residual-heat used type electric dust separator according to claim 1, which is characterized in that the outer surface of the shell (1) covers Covering and thermal insulation material.

6. residual-heat used type electric dust separator according to claim 1, it is characterised in that: the shell of the anode plate (6) uses Vinylite electro-conductive glass is made.

7. residual-heat used type electric dust separator according to claim 1, it is characterised in that: the cathode line (7) is 2205 stainless The rigid bur line of steel material.

8. residual-heat used type electric dust separator according to claim 1, it is characterised in that: the bottom in the shell (1) is equipped with Ash bucket (8).