CN207899175U - A kind of hot investment casting roasting kiln flue purification system - Google Patents

Abstract

The utility model discloses a flue purification system of a precision casting roasting kiln, which comprises a kiln. The dust with large particles and large specific gravity can filter out the finer dust in the smoke. Followed by the water film dust collector to further improve the dust removal effect. Of course, the water film dust collector is more important to cool down the smoke again, so it is necessary to add a chiller unit, so that the proportion of water vapor in the smoke will be greatly reduced for subsequent electrostatic dust removal If there is too much water vapor, the electrostatic precipitator will not be able to function normally, so it is very necessary to add chillers. Next, the electrostatic precipitator uses a high-voltage electric field to ionize the flue gas, and the charged dust in the airflow is separated from the airflow under the action of the electric field. The last step is to crack the malodorous gas with UV photolysis air purifier. Finally, it can be released to the atmosphere with confidence.

Description

A precision casting roasting furnace kiln flue purification system

technical field

The utility model relates to the technical field of environmental protection equipment, in particular to a flue purification system of a precision casting roasting furnace and kiln.

Background technique

Wax discharge kiln is widely used in industrial sintered products, but its obvious defect is serious environmental pollution, which mainly comes from the random discharge of smoke. Therefore, the relevant national departments have issued the "Emission Standard of Air Pollutants for Industrial Furnaces" (GB9078- 1996) to limit the behavior of enterprises without environmental awareness.

However, there are also companies that are very attentive and focus on solving the problem of smoke emission from the wax discharge kiln. Among them, the utility model patent CN201510124951.4 of an enterprise in Hunan discloses a wax discharge smoke treatment furnace. The wax discharge smoke treatment furnace includes a furnace body, The fire-spraying assembly and the wax-discharging chimney for discharging the waste gas in the wax-discharging kiln. The wax-discharging chimney is provided with a first valve, and the first valve separates the wax-discharging chimney to form a first valve connected to the wax-discharging kiln. Exhaust section and the second exhaust section that discharges the gas to the outside of the wax discharge kiln; the furnace body is provided with a first combustion chamber, and the air inlet of the first combustion chamber is connected to the gas outlet of the wax discharge chimney The first exhaust section communicates, and the air outlet of the first combustion chamber communicates with the second exhaust section of the wax exhaust chimney; the furnace body is provided with a vent for the outside air to enter the first combustion chamber The first air hole; the flame injection port of the flame injection assembly is located in the first combustion chamber.

The design of this utility model patent technology is mainly aimed at the circular combustion of wax in the furnace, thereby reducing the wax discharge to the air and reducing air pollution. It mainly solves the problem of insufficient wax combustion in the air in the kiln, and solves the problem of wax discharge to the air, but the discharged gas also contains a large amount of particulate dust and harmful gases and other wastes, which have not been well obtained solve.

Utility model content

The purpose of the utility model is to overcome the above defects of the prior art, and provide a precision casting roasting kiln flue purification that has no odor, no discomfort to the human body, realizes harmless and safe discharge, reduces air pollution, and realizes the concept of energy saving and environmental protection. system.

In order to achieve the above purpose, the utility model is achieved through the following technical solutions: a precision casting roasting furnace flue purification system, including a furnace, characterized in that the smoke exhaust pipe of the furnace is connected to a cooling tower, The cooling tower is connected with a bag filter, and the bag filter is connected with a water film filter, and the water film filter is connected with an electrostatic precipitator, and the electrostatic filter is connected with a UV photolysis filter. An air purifier, the UV photolysis air purifier is finally connected with a high-altitude chimney.

As a preference, a chiller unit is also connected to the side of the water film dust collector.

The utility model sends the waxy smoke in the kiln to the cooling tower for cooling, and the cooling tower is a fan dry heat exchange cooling method. Then use the bag filter to filter out the large and specific dust in the smoke, and filter out the finer dust in the smoke. Followed by the water film dust collector to further improve the dust removal effect. Of course, the more important thing for the water film dust collector is to cool down the smoke again. Generally, it is better to control it at about 20°C, so it is necessary to add an ice water unit to increase the proportion of water vapor in the smoke. It will greatly reduce the service for the subsequent electrostatic precipitator. If there is too much water vapor, the electrostatic precipitator will not be able to function normally, so the addition of chilled water units is very necessary. Next, the electrostatic precipitator uses a high-voltage electric field to ionize the flue gas, and the charged dust in the airflow is separated from the airflow under the action of the electric field. The last step is to crack the malodorous gas with UV photolysis air purifier. Finally, it can be released to the atmosphere with confidence.

The components involved are explained below: the bag filter is a dry dust filter device, which is suitable for collecting fine, dry, non-fibrous dust. The filter bag is made of textile filter cloth or non-woven felt. The dust-containing gas is filtered by the filter function of the fiber fabric. When the dust-containing gas enters the bag filter, the dust with large particles and specific gravity settles down due to the action of gravity and falls into the ash hopper, while the gas containing finer dust When passing through the filter material, the dust is blocked and the gas is purified.

The water film dust collector is that the dust-containing gas is introduced tangentially from the lower part of the cylinder, rotates up, and the dust particles are separated by centrifugal force, thrown to the inner wall of the cylinder, absorbed by the water film layer flowing on the inner wall of the cylinder, and flow to the bottom with the water The inner cone is discharged through the dust outlet. The water film layer is formed by several nozzles arranged on the upper part of the cylinder, spraying water tangentially to the wall of the device. In this way, the inner wall of the cylinder is always covered with a layer of very thin water film that rotates and flows downwards, so as to achieve the purpose of improving the dust removal effect.

The electrostatic precipitator uses a high-voltage electric field to ionize the flue gas, and the dust charge in the airflow is separated from the airflow under the action of the electric field.

The UV photolysis air purifier is a device that uses a special high-energy high-ozone UV ultraviolet light beam to irradiate the malodorous gas and crack the malodorous gas. Cracking malodorous gases such as: ammonia, trimethylamine, hydrogen sulfide, methyl sulfide, methyl mercaptan, methyl sulfide, dimethyl disulfide, carbon disulfide and styrene, sulfide H2S, VOC, benzene, toluene, xylene molecules Bond, so that the pollutant molecules in the free state are oxidized and combined with ozone to form small molecular harmless or low-harm compounds, such as CO2, H2O, etc.

The ice water unit has four main components: compressor, evaporator, condenser and expansion valve, thus realizing the cooling and heating effect of the unit.

Beneficial effects: the utility model first sends the waxy smoke in the kiln to the cooling tower for cooling. Then use the bag filter to filter out the large and specific dust in the smoke, and filter out the finer dust in the smoke. Followed by the water film dust collector to further improve the dust removal effect. Of course, the more important thing for the water film dust collector is to cool down the smoke again. Generally, it is better to control it at about 20°C, so it is necessary to add an ice water unit to increase the proportion of water vapor in the smoke. It will greatly reduce the service for the subsequent electrostatic precipitator. If there is too much water vapor, the electrostatic precipitator will not be able to function normally, so the addition of chilled water units is very necessary. Next, the electrostatic precipitator uses a high-voltage electric field to ionize the flue gas, and the charged dust in the airflow is separated from the airflow under the action of the electric field. The last step is to crack the malodorous gas with UV photolysis air purifier. Finally, it can be released to the atmosphere with confidence.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure: 1-Kiln, 2-Exhaust pipe, 3-Cooling tower, 4-Bag dust collector, 5-Water film dust collector, 6-Ice water unit, 7-Electrostatic precipitator, 8-UV photolysis Air cleaner, 9-high-altitude chimney.

Detailed ways

In order to make the technical means, creative features and objectives of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

Embodiment: As shown in Fig. 1, a kind of flue purification system of precision casting roasting furnace kiln comprises a furnace kiln 1, and the exhaust pipe 2 of furnace kiln 1 is connected with a cooling tower 3, and cooling tower 3 is connected with a bag type dedusting Device 4, bag filter 4 is connected with a water film dust collector 5 again, and water film dust collector 5 side is also connected with a chilled water unit 6. The water film dust collector 5 is connected with an electrostatic precipitator 7, and the electrostatic precipitator 7 is connected with a UV photolysis air cleaner 8, and the UV photolysis air cleaner 8 is finally connected with a high-altitude chimney 9.

Use: the utility model sends the waxy smoke in the kiln to the cooling tower to cool down. Then use the bag filter to filter out the large and specific dust in the smoke, and filter out the finer dust in the smoke. Followed by the water film dust collector to further improve the dust removal effect. Of course, the more important thing for the water film dust collector is to cool down the smoke again. Generally, it is better to control it at about 20°C, so it is necessary to add an ice water unit to increase the proportion of water vapor in the smoke. It will greatly reduce the service for the subsequent electrostatic precipitator. If there is too much water vapor, the electrostatic precipitator will not be able to function normally, so the addition of chilled water units is very necessary. Next, the electrostatic precipitator uses a high-voltage electric field to ionize the flue gas, and the charged dust in the airflow is separated from the airflow under the action of the electric field. The last step is to crack the malodorous gas with UV photolysis air purifier. Finally, it can be released to the atmosphere with confidence.

Claims (2)

1. a kind of hot investment casting roasting kiln flue purification system, including a stove, which is characterized in that the smoke exhaust pipe of the stove It is connected with a cooling tower, the cooling tower reconnection has a sack cleaner, the sack cleaner reconnection to have a moisture film to remove Dirt device, the water dust scrubber reconnection have an electrostatic precipitator, the electrostatic precipitator reconnection to have a UV photodissociation air net Change device, the UV photodissociation air purifier is finally connected with a high-altitude chimney.

2. hot investment casting roasting kiln flue purification system according to claim 1, which is characterized in that the water film dedusting Device side is also associated with an ice water unit.