Characteristics of dust collectors in foundries:

1. Easy maintenance and upkeep, using an upward lifting cover structure, the top cover can be removed to extract the dust bag structure for bag replacement. The service life of its dust removal bag is 18-24 months, while the glass fiber filter material is generally 8-12 months, and the maintenance cycle time increases relatively. Relatively reduced operating costs.

2. The project is cost-effective and occupies a small area. The composite filter material used in this machine equipment has significantly enhanced energy, flexural strength, and tensile strength compared to glass fiber filter material. It can withstand high temperatures and improve filtering wind force, which is twice that of glass fiber filter material. It relatively reduces the total filtering area of the dust collector, which is half of the total filtering area of the glass fiber dust bag dust collector. The net weight of the machine equipment is 50% lighter. We have achieved the goal of reducing project investment costs and minimizing land occupation.

3. The negative pressure dust removal system software has its main centrifugal fan in a cleaning and rotating office environment, and the leaves of the main centrifugal fan do not need to be cleaned, maintained, or serviced. The centrifugal fan operates relatively smoothly.

4. The ash removal effect is very good. The actual effect of ash removal is a condition for the application of dust collectors. The machine equipment uses a large-diameter submerged direct pulse solenoid valve, which has low friction resistance and low air pressure in the gas generator. The working pressure of the gas generator can reach 2001080a at the moment of ash removal, and the ash removal effect is very good. The commonly used pulse electromagnetic valve pulse damper is a technical joint venture between China and the United States, with a service life of one million times.

The principle of dust collector for fabric bags in foundries

The smoke and dust vapor enters the turbulent flow cooling tower, where the high-temperature smoke and dust vapor is cooled once, and the temperature can be reduced to 150-160 ℃. Another part of the coarse particles settle out of the foundation under the effects of expanding the vapor, reducing water flow, and hurricanes; Subsequently, the smoke and dust vapor enters the multi tube cooler, where the smoke and dust are further cooled and the temperature drops below 100 ℃. The smoke and dust vapor then enters the bag filter for dust removal; The cleaned vapor is drawn to the exhaust pipe by a centrifugal fan, and the temperature of the vapor at the inlet and outlet of the exhaust pipe is 59 ℃. System testing, based on the selection of secondary dust removal system software, achieved a dust removal efficiency of 97% through the high-pressure pulse of the secondary LCPM series product dust collector for the bag filter. Above 5%, the dust concentration value is 75mg/m3, and the dust from the aluminum melting furnace meets the emission regulations.

The bag type dust remover in the foundry is mainly composed of pre wetting mixing tissue, Venturi nozzle, impact dust collection tissue, secondary foam plastic cleaning tissue, dehydrator, circulating water system, elbow dehydrator, centrifugal fan, etc. The waste gas enters the Venturi nozzle through the pre wetting mixing organization, (there is shrinkage water in the branch pipe, and there is fog water in the throat) to atomize the sprinkling water droplets and shrinkage water. The impact dust collection organization carries out the primary dust removal, and then the secondary sufficient cleaning and flue gas desulfurization are carried out through the secondary foam plastic cleaning organization. Then, the elevated steam rises in the dust remover with a relatively slow water flow, and the steam and water are separated under the force and the effect of the dehydrator. The clean steam is drained to the air by the centrifugal fan after the primary dehydration by the elbow dehydrator.

Dust collectors in casting factories, bag dust collectors in casting factories, crushing processes, smelting processes, core design processes, casting processes, sand dropping processes, sand solution processes, and other processes in the production and manufacturing processes of casting factories are all pollutants that emit a lot of dust during the production process. If not rectified, it will seriously pollute the working environment. The dust removal machinery and equipment in casting factories have solved the environmental pollution problem in the casting industry and ensured their qualified emissions.

1. Smelting process: The hot flue gas emitted during the entire smelting process of the medium frequency induction furnace is mainly composed of dust and a small amount of carbon dioxide. The high-frequency induction furnace is planned to be installed with a movable enclosed hood (capture rate). The smelting waste gas generated is collected by the enclosed hood, and the smoke and dust vapor enter the hurricane dust collector for temperature reduction and dust removal. Then, it enters the sand solution bag dust collector in the foundry (high-temperature dust removal cloth bags are required for the medium frequency induction furnace smoke and dust casting factory sand solution bag dust collector). After dust removal, the dust emission concentration value is 25mg/m3, and the emission amount is 1. 76t/a， Consider the second level standard in Table 2 of the "Emission Specification for Air Pollutants from Furnaces and Kilns" (GB9078.1996), and then discharge it through a 50m high exhaust pipe.

2. Gray cast iron process: The spheroidizing agent in the gray cast iron process will cause strong reactions after being packaged, resulting in a lot of dust, mainly composed of magnesium oxide particles. Set up a gas collection hood at the upper end of the gray cast iron package, collect smoke and exhaust gases, and send them to the sand solution bag dust collector in the foundry for cleaning. After cleaning, the smoke and exhaust gases are discharged from a 50m chimney.

3. Design and Core Making Process: The core making production process of the design and core making process is caused by dust. In the first phase, four core making machines with a waste gas volume of 10000M3/h will be installed; The second phase installation of 8 core shooting machines has a waste gas volume of 20000M3/h. The concentration of waste gas and dust caused by the core making machine is about 1500Mg/m3. After being collected by the dust collector cover, it enters the foundry sand to solve the dust removal and cleaning of the cloth bag dust collector. After dust removal, the dust emission concentration value is 15mg/m3. Considering the second level standard in Table 2 of the Comprehensive Emission Specification for Air Pollutants (GB16297-1996), it is discharged through a 15m high exhaust pipe after passing the inspection.

4. Casting process of castings: During the entire casting process, there is a small amount of dust emitted without any mechanism. According to the ventilation measures of the mechanical equipment exhaust system in the production workshop, the office environment in the production workshop will be improved.

5. Sand removal process: After being cooled by the molding design line, the casting parts are removed of the vast majority of mold sand using a vibrating sand removal machine. The sand production process is caused by dust, resulting in a concentration value of about 3500Mg/m3. After being collected by a closed cover, the sand is sent to the foundry to solve the dust removal and cleaning of the cloth bag dust collector. After dust removal, the dust emission concentration value is 35mg/m3. Considering the second level standard in Table 2 of the Comprehensive Emission Specification for Air Pollutants (GB16297-1996), it is discharged through a 30m high exhaust pipe after passing the inspection.

6. Old sand solution process: During the environmental pollution stage of the sand solution process, the dust caused by the sand mixer and various raw materials are transported, shipped, and stored without any institutional dust. Sand, new sand, fine coal, clay, epoxy resin, etc. are mixed with a sand mixer, and water is added throughout the entire sand mixing process to reduce the amount of dust caused by sand mixing. The sand mixing production process is caused by dust, and the concentration of dust in the exhaust gas of the sand mixing machine is about 2000Mg/m3. After being collected by a closed cover, it is sent to the foundry for dust removal and cleaning of the cloth bag dust collector. The dust emission concentration after dust removal is 50mg/m3. Considering the second level standard in Table 2 of the Comprehensive Emission Specification for Air Pollutants (GB16297-1996), it is discharged through a 50m high exhaust pipe after passing the inspection.

The design scheme of the dust collector in the foundry and the cloth bag dust collector in the foundry meet the requirements of environmental protection indicators. It is a new type of single pulse cloth bag dust collector that has been tested for a long time. It has the advantages of solving the problem of large gas working capacity, stable characteristics, convenient practical operation, long service life of dust removal bags, and low maintenance labor. Available mechanical equipment, metallurgical industry, vulcanized rubber, wheat flour, chemical plants, pharmaceutical industry, carbon, decorative building materials, mining companies. And reform and innovation have been carried out in terms of structure and relays, solving the problem of low outdoor placement and air compression working pressure.

Advantages of Foundry Dust Collector and Foundry Bag Dust Collector:

1. The design plan above the flower board in the bag house includes a maintenance aisle for easy installation, inspection, and replacement of dust removal bags.

2. Without the need for pre dust removal equipment, it can solve dust concentrations up to 1000g/m3 in one go, with emissions below 50g/m3, and a simple production process.

3. The entire machinery adopts a microcomputer automatic control system, and the main parameters are easy to adjust, which can complete non job work.

4. The total number of pulse solenoid valves is small, the compressive strength of ash removal is high, and the hands and eyes are quick.

5. Dust bag has a service life of over two years and is easy to complete protective maintenance.