CN204865391U - Static smoke abatement ware for fire control - Google Patents

Abstract

The utility model discloses an electrostatic precipitator for fire-fighting, which comprises a shell (1) through which flue gas passes and an electric control device (8) placed outside the shell (1). The direction of the airflow is provided with a coarse-effect filter screen (10), a circular hole-shaped ionization area (20), a plate-shaped dust collection area (30) and a fan (40). (6) Motor (81), control circuit (82) and power supply (83) of package. The electrostatic precipitator for fire fighting of the utility model has good fire smoke treatment effect.

Description

Electrostatic smoke eliminator for fire fighting

technical field

The utility model belongs to the technical field of fire-fighting equipment, in particular to an electrostatic precipitator for fire-fighting with good fire smoke treatment effect.

Background technique

According to statistics, more than 85% of the people who died in the fire were caused by inhaling excessive smoke. The hazards of smoke to fire escape personnel are mainly manifested in chemical toxicity, physical high temperature, light reduction and psychological terror. Among them, the darkness and fear brought by the light reduction are the main reasons for the disorientation and further vicious circle of the fire escape personnel. Therefore, from the perspective of light reduction, the removal of particulate matter in fire smoke is an important research direction to enhance the survival probability of fire escapers.

The existing flue gas treatment device is an electrostatic precipitator applied to flue gas treatment of thermal power plants, boilers and the like. Such as the flue gas treatment device disclosed in the Chinese invention patent application "a flue gas treatment device" (application number: 201310746342.3, publication date: 2014.4.2), which integrates an electric precipitator and a flue gas heater in a flue gas housing. However, due to the essential difference in composition between the flue gas of a thermal power plant and the flue gas of a fire, the exhaust gas treatment device used in a thermal power plant cannot achieve the desired effect. The combustion equipment of the thermal power plant has a complete fuel and oxygen supply device, and the combustion efficiency is very high. It will soon turn to anoxic combustion, and the main components of the generated particulate matter are graphite and carbon black. Due to its strong conductivity (specific resistance less than 102Ω1cm), after being ionized by the corona electrode of the electrostatic precipitator, the charge on the particles will be released at the moment of contact with the dust collector, and escape from the capture of the dust collector.

Therefore, the problem existing in the prior art is: when the electrostatic precipitator is used for fire smoke treatment, the effect is extremely poor.

Contents of the invention

The purpose of the utility model is to provide an electrostatic precipitator for fire-fighting, which has a good fire smoke treatment effect.

The technical solution to realize the purpose of this utility model is: an electrostatic precipitator for fire protection, including a shell for the smoke to pass through and an electric control device placed outside the shell. A filter screen, a circular hole-shaped ionization area, a plate-shaped dust collection area and a fan, the electric control device includes a motor wrapped by heat-insulating asbestos tiles (6), a control circuit and a power supply.

Compared with the prior art, the utility model has significant advantages:

The utility model is designed and optimized aiming at the characteristic of low specific resistance of fire smoke particles, and has good treatment effect.

because:

1. The utility model adopts the dust collecting plate coated with conductive paint. Considering that the fire smoke is mainly generated by combustion under the condition of lack of oxygen, the smoke contains a large amount of graphite carbon black, which has high conductivity, which will cause the particles to lose their charge at the moment they contact the dust collection plate, and the dust collection fail. If the general electrostatic precipitator only uses metal dust collection plates, the actual dust collection efficiency is likely to be less than 50%. In order to improve efficiency, it is necessary to increase the residence time of particles on the surface of the dust collecting plate. The surface of the dust collector is coated with a conductive coating with resistance, so that the particles with low specific resistance can keep the charge carried by ionization for a longer time.

2. The use of conductive coating is equivalent to increasing the resistance between parallel plates, and the effect of ionizing air will be reduced. In order to improve the efficiency of electric field ionization, the utility model adopts the design of double electrostatic field, and uses the perforated metal plate and the corona wire dedicated to the function of ionizing the surrounding air to separate the ionization function of the parallel plates. In this way, the electric field area of the utility model can be divided into two parts, the circular hole-shaped ionization area and the plate-shaped dust collection area, and the overall performance structure is optimized.

The combination of the above two measures significantly improves the practical efficiency of the utility model.

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

Description of drawings

Fig. 1 is the structural schematic diagram of the electrostatic precipitator for fire protection of the present invention.

FIG. 2 is a cross-sectional view along line A-A of FIG. 1 .

Fig. 3 is a B-B sectional view of Fig. 1 .

Figure 4 is a diagram of an example of a bracket.

Fig. 5 is an example diagram of a brush placed on a support.

In the figure, the housing 1, the coarse filter screen 10, the circular hole-shaped ionization area 20, the metal plate with holes 21, the corona wire 22, the plate-shaped dust collection area 30, the dust collection plate 31, the high-voltage pole plate 32, and the dust removal Device 33, hair brush 331, support 332, fan 40, heat-insulating asbestos tile 6, electric control device 8.

Detailed ways

As shown in Figure 1, the electrostatic precipitator for fire fighting of the present invention includes a casing 1 for the passage of flue gas and an electric control device 8 placed outside the casing 1. Coarse filter screen 10, circular hole-shaped ionization area 20, plate-shaped dust collection area 30 and fan 40, the electric control device 8 includes a motor, control circuit and power supply wrapped by heat-insulating asbestos tiles 6.

As shown in FIG. 2 , the circular hole-shaped ionization region 20 includes a perforated metal plate 21 and a corona wire 22 placed in the middle of the hole of the perforated metal plate 21 , and the perforated metal plate 21 is perpendicular to the airflow direction.

As shown in Figure 3, the plate-shaped dust collection area 30 includes a plurality of dust collection plates 31 fixed on the upper part of the housing 1, and a high-voltage pole plate 32 is also included between every two dust collection plates 31. The pole plate 32 is fixed on the lower part of the housing 1, and the dust collecting plate 31 and the high-voltage pole plate 32 are both parallel to the airflow direction and perpendicular to the ground.

The corona wire 22 and the high voltage plate 32 are connected to the positive pole of the power supply, the metal plate with holes 21 and the dust collecting plate 31 are connected to the negative pole of the power supply, and the casing 1 is grounded.

The corona zone is composed of a metal plate 21 with holes and a corona wire 22 in the middle of the holes. Through the electric field formed by the high voltage between the two, the fire smoke has gone through three steps of corona discharge, gas ionization, and particle charging.

It also includes a dust removal device 33 arranged between two adjacent dust collecting plates 31, the dust removal device 33 includes a high temperature resistant brush 331 and a bracket 332, and the bracket 332 is placed above the high voltage plate 32 away from the electric control On one side of the device 80 , one end of the brush 331 is rotatably placed on the bracket 332 , and the other end passes through the housing 1 near the side of the electric control device 8 and is connected to the motor.

The dust collecting plate 31 is made of metal material, and its surface is coated with a high temperature resistant conductive ceramic coating.

The entrance of the device of the utility model adopts a coarse-effect filter screen, and the high-temperature flue gas enters the smoke removal device from the left side. First, through the coarse-effect filter, the larger particles in the gas are filtered to prevent large particles from entering the equipment and affecting the smoke removal equipment, and then the flue gas enters the circular hole-shaped ionization area.

Then the particles with charge continue to move forward and enter the plate-shaped dust collection area 30. Under the action of the electric field force between the dust collection plate 31 and the high voltage plate 32, the particles move to the dust collection plate 31 and adhere to the conductive coating. The dust collecting plate 31 surface. Since the conductive coating increases the resistance between the particles and the metal plate, even though the smoke particles have a high conductivity, they will not lose their charge in a short time and separate from the plate.

After working for a period of time, the integrated circuit control module will stop the power supply to the pole plate, and start the small motor 21 of the dust cleaning device 33 . The power is transmitted to the screw mandrel by the gear, and drives the support 332 and the small brush 331 to move back and forth, sweeping the particles into the ash hopper 5 .

The utility model changes the traditional single-zone electrostatic dust removal into a double-zone electrostatic field, that is, a circular hole-shaped ionization zone and a plate-shaped dust collection zone. It can be appropriately reduced, and its advantages are: ① Effective use of the efficiency advantage of the circular hole-shaped corona electrode when charging the particles. ②The voltage of the high-voltage plates in the dust collection area can be properly reduced to reduce the risk of possible breakdown of the flue gas between the plates due to the increase in the concentration of conductive particles in the flue gas. ③It is more convenient to clean the dust in the plate-shaped dust collection area.

The dust collection plate is coated with a high temperature resistant conductive ceramic coating, the purpose of which is to increase the resistance between the particles and the dust collection electrode, to balance the problem of excessive conductivity of the particles, to increase the charging time of the particles, so that they can be charged for a longer period of time. Attached to the dust collection plate, it fundamentally solves the problem of low efficiency of traditional electrostatic precipitators in removing fire smoke.

The pole plates in the dust collection area are placed perpendicular to the ground and arranged in a staggered manner. The corona plate connected to high voltage is fixed on the top of the external machine through insulators, and the dust collecting plate is fixed on the bottom of the external machine. There is an ash outlet below it, so that the collected flue gas particles can effectively leak into the ash when cleaning the dust. fighting. Such a design can optimize the overall structure and make the device more efficient.

The fan is installed at the tail of the equipment and adopts the working method of drafting, which can effectively prevent the impact of particles in the flue gas on the fan blades, slow down its corrosion and prolong its service life.

The dust cleaning device is composed of a small motor, a screw rod and a small brush placed inside the device. Whenever the dust collector works for a period of time, the equipment control module will stop the power supply to the plate and start the small motor of the dust cleaning system. The power is transmitted to the screw by the gear, and drives the small brush to move back and forth to clean the dust.

The utility model should be hung on the top of the smoke-proof partition when in use, the power supply part of the equipment is connected with the fire-fighting power supply, and the control circuit part is connected with the fire alarm system of the building. When the fire alarm system of the building detects a fire, the fire electrostatic smoke eliminator suspended in the smoke prevention zone near the alarm system control area starts. In addition, the device itself has a smoke detection function, and the device can automatically start when smoke is detected.

Claims (6)

1. a fire-fighting electrostatic precipitator, comprise the housing (1) that passes through for flue gas and be placed in housing (1) electric control gear outward (8), it is characterized in that: in described housing (1), be provided with low efficient filter screen (10), circular hole ionized region (20), tabular dust collection section (30) and blower fan (40) successively along airflow direction, described electric control gear (8) comprises the motor (81), control circuit (82) and the power supply (83) that are wrapped up by heat insulating asbestos shingle (6).

2. fire-fighting electrostatic precipitator according to claim 1, it is characterized in that: described circular hole ionized region (20) comprises perforated metal plate (21) and is placed in the corona wire (22) in the middle of the hole of perforated metal plate (21), and perforated metal plate (21) is perpendicular to airflow direction.

3. fire-fighting electrostatic precipitator according to claim 2, it is characterized in that: described tabular dust collection section (30) comprises the multiple dust collection plates (31) being fixed on housing (1) internal upper part, a high-pressure polar plate (32) is also comprised between every two dust collection plates (31), described high-pressure polar plate (32) is fixed at housing (1) interior bottom, described dust collection plate (31) is all parallel with airflow direction with high-pressure polar plate (32), and perpendicular to the ground.

4. fire-fighting electrostatic precipitator according to claim 3, it is characterized in that: described corona wire (22) is connected with the positive pole of high-pressure polar plate (32) with power supply (83), perforated metal plate (21) is connected with the negative pole of dust collection plate (31) with power supply (83), housing (1) ground connection.

5. fire-fighting electrostatic precipitator according to claim 3, it is characterized in that: also comprise the deashing device (33) be located between adjacent two dust collection plates (31), described deashing device (33) comprises high temperature resistant hairbrush (331) and support (332), described support (332) is placed in high-pressure polar plate (32) top away from electric control gear (80) side, described hairbrush (331) one end is rotatable to be positioned on described support (332), the other end is through close electric control gear (8) side of housing (1), and be connected with motor (81).

6. fire-fighting electrostatic precipitator according to claim 3, is characterized in that: described dust collection plate (31) is made up of metal material, and its surface scribbles high temperature resistant conductivity ceramics coating.