CN205317863U - Formula dust lotus electric quantity detection device is sprayed in pulse - Google Patents

Abstract

The utility model discloses a pulse-jet type detection device for dust charge quantity, which mainly includes a dust generation system, a dust pulse atomization system, a dust charge system and a charge quantity detection system. The dust is conveyed to the dust atomization injection pipe through the screw conveying powder device, and at the same time, the blowing time and flow rate of the air pump are controlled to form a pulsed injection in the dust atomization system, so that the gas and dust are fully mixed to form an aerosol and slowly The speed enters the dust charging area, so that the dust is saturated and charged, and the charged dust passes through the metal mesh and falls into the metal inner cylinder, and then the charge amount of the dust in the inner cylinder is detected by the charge detection system. The utility model belongs to the field of energy and environmental protection. The size of the dust charge is of great significance to the fields of industry and scientific research. A device designed to realize the detection of the dust charge has very broad application prospects.

Description

A pulse-jet dust charge detection device

technical field

The utility model belongs to the field of energy utilization and environmental protection, in particular to a pulse-jet type detection device for dust charge.

Background technique

With the rapid development of industry, my country's air pollution is becoming increasingly serious. At present, particulate matter is the main pollutant in my country's atmospheric environment, and my country's newly promulgated pollutant discharge standards require effective control of the emission of fine particulate matter. In industry, dust collectors are mainly used to control particulate matter emissions, and dust collectors mainly use electrostatic dust removal. The detection of dust charge plays a vital role in the movement trajectory and capture of dust particles in the electric field. In the electric field, the electrons, anions or cations generated after gas ionization attach to the dust to charge the dust. The charged dust settles on the electrode under the action of the electric field force, so that the dust is separated from the gas. Therefore, dust charging is the key to affect the efficiency of electrostatic dust removal. At the same time, the detection of the dust charge is also helpful for the research of the movement of the charged dust in the electric field.

At present, there are few devices on the market for detecting the charge of atomized dust. Now we have made some innovations in the powder feeding device and the horizontal air flow channel by combining the research on dust characteristics and physical methods, so that the gas and dust are mixed to form an aerosol, which enters the area of the dust charging device at a moderate speed, so that the dust is saturated and charged. Then, the charge amount of the dust in the inner cylinder is detected by the charge amount detection system to complete the detection of the dust charge amount.

Utility model content

The purpose of this utility model is to provide a device for pulse jet dust charge detection, which is divided into dust generation system, dust pulse atomization system, dust charge system and charge detection system. The dust generation system includes a screw powder feeding device, a motor, etc.; the dust pulse atomization system includes an air pump and its control circuit, a flow meter, a dust atomization injection pipe, an air flow channel, etc.; the dust charging system includes a dust charging device, a burr electric Halo wire, DC high-voltage power supply, insulators, wires, etc.; charge detection system includes metal shielding cylinder, metal inner cylinder, metal mesh, insulating board, charge detection device, etc. By installing a rotary transmission structure inside the branch pipeline of the screw powder feeding device, a tapered air flow channel is set at the intersection of the horizontal air flow channel and the screw powder feeding device, and at the same time, the blowing time and flow rate of the air pump are controlled to form a pulsed injection, so that the gas and dust The aerosol formed by thorough mixing enters the area of the dust charging device at a moderate speed, so that the dust is saturated and charged, which is convenient for the subsequent detection of the dust charge.

The utility model mainly includes the following contents:

1. A dust generation system provided by the utility model, the dust generation system includes a screw powder feeding device, a motor and the like. There is a screw transmission rod inside the dust transmission pipe on the branch road of the screw powder feeding device, which is driven by a motor. Part of the dust particles falling from the dust storage funnel to the airflow channel will fall on the screw conveying rod, and then carried by the screw conveying rod to the dust atomization injection pipe, so that the dust is quickly taken away by the airflow of the airflow channel; at the same time, due to the spiral The rotation of the transmission rod inside the transmission pipe produces a certain turbulent flow inside it, which makes the dust generate a certain speed, and has a certain anti-clogging effect on the lower part of the ash storage funnel, so that the dust particles can flow smoothly.

2. A dust pulse atomization system provided by the utility model includes an air pump and its control circuit, a flow meter, a dust atomization injection pipe, an air flow channel, and the like. At the dust atomization injection pipe, the channel of a certain length is tapered and then expanded. When the airflow passes through the tapered section, the airflow velocity increases significantly here, so that the dust is quickly atomized under the action of the airflow to form an aerosol, and it can prevent the dust particles from clogging here, so that the aerosol can circulate smoothly. The air pump is controlled by the circuit to form a pulsed air flow in the pipeline, and the gas flow is controlled by the flow meter installed between the air pump and the screw powder feeding device, so that the dust at the powder feeding port is atomized and enters the charging device area at a slower speed; At the same time, the motor at the tail of the screw powder feeding device can control the speed of the screw transmission rod, that is, the amount of dust particles can be controlled. The purpose of this is to fully mix the airflow with the dust, so that the dust is saturated and charged at the dust charging device, and the charged dust passes through the metal mesh and falls into the metal inner cylinder, which is convenient for the subsequent detection of the dust charge.

3. A dust charging system improved by the utility model, including a dust charging device, a prickly corona wire, a DC high-voltage power supply, an insulator, an electric wire, and the like. The pulse airflow generated by the air pump carries the dust to the charging area at a slow speed, so that the dust is saturated and charged at the charging device, which is convenient for the subsequent detection of the dust charge.

4. A charge detection system provided by the utility model includes a metal shielding cylinder, a metal inner cylinder, a metal mesh, an insulating plate, a charge detection device, and the like. The saturated charged dust passes through the metal mesh and falls into the metal inner cylinder to realize the detection of the dust charge.

The beneficial effects of the utility model:

1. The spiral conveying rod inside the spiral powder feeding device can carry the dust falling from the dust storage funnel to the dust atomization injection pipe, and at the same time, due to the turbulence of the air flow, the lower part of the dust storage funnel is not easy to block the dust;

2. The tapered structure at the dust atomization injection pipe makes the airflow speed increase rapidly, and the dust is rapidly atomized under the action of the airflow to form an aerosol, so as to prevent dust particles from clogging the injection pipe;

3. By controlling the speed of the screw conveyor rod, the amount of powder feeding can be controlled, so that the air flow can be fully mixed with an appropriate amount of dust to form an aerosol;

4. The pulse blowing method makes the aerosol enter the dust charging area at a slower speed, which is conducive to dust saturation charging.

5. The air flow channel is made of metal material and grounded, which can neutralize the electrostatic charge generated by dust due to collision and friction. It ensures that the saturated charge of the dust is the electric charge obtained by electric field charging, which is convenient for scientific research and analysis.

Description of drawings

Figure 1 is a pulse-jet dust charge detection device, in which 1-air pump; 2-flow meter; 3-screw powder feeding device; 4-dust atomization injection tube; 5-motor; 6-air flow channel; 7-insulator ;8-wire; 9-dust charging device; 10-thorn corona wire; 11-DC high voltage power supply; 12-metal mesh; 13-metal inner cylinder; 14-metal shielding cylinder; 15-insulation board; Charge detection device. Fig. 2 is a side view of the screw powder feeding device, wherein 4-dust atomization injection pipe; 17-dust storage funnel; 18-screw transmission rod; 19-dust transmission pipe; 20-motor.

detailed description

1. The air pump is controlled by the circuit to generate pulse air flow, and the flow meter is adjusted to make the flow suitable.

2. The dust in the dust storage funnel falls onto the screw transmission rod in the dust transmission pipe, and the motor drives the screw transmission rod to rotate, driving the dust into the dust atomization injection pipe, where it is atomized to form an aerosol;

3. After the aerosol formed by the mixture of dust and airflow is sprayed out, due to the sudden enlargement of the airflow channel and the intermittent pulse airflow, the flow speed will slow down and enter the dust charging area. Powered by a DC high-voltage power supply, an extremely uneven electric field is generated near the burr corona wire, which will saturate the dust with charge.

4. The charged dust falls to the metal inner cylinder through the metal mesh, and the metal shielding cylinder eliminates the interference of external charges, and finally realizes the detection of the charge of the dust particles through the charge detection device.

Claims (4)

1. an impulse jet type dust charge electric quantity detection apparatus, it is characterized in that, it is provided with spiral driven rod inside dust dispatch tube on helix powder feeding device branch road, work is driven by motor, the dust granules thing of gas channel is dropped to by gray storing funnel, a part can be fallen on spiral driven rod, spiral driven rod carry to dust atomized spray pipe.

2. an impulse jet type dust charge electric quantity detection apparatus, it is characterised in that at dust atomized spray pipe place, certain length gas channel expands passage again for first convergent.

3. an impulse jet type dust charge electric quantity detection apparatus, it is characterized in that, control air pump by circuit in pipeline, form air pulse, and control gas flow by the effusion meter installed between air pump and helix powder feeding device, the speed of the Motor Control spiral driven rod of helix powder feeding device afterbody, namely can control the amount of dust granules thing simultaneously.

4. a kind of impulse jet type dust charge electric quantity detection apparatus according to claim 1 or 2 or 3, it is characterized in that, by helix powder feeding device, dust is delivered to dust atomized spray pipe place, tapered configuration herein produces high velocity air and makes dust rapid atomization, and the air pulse produced by air pump carries to the charged region of dust with speed more slowly, charged dust falls into metal inner core through wire netting, carries out dust charge electric power detection.