A Brief Introduction of City Waste Management

The main components of city waste (municipal solid waste) include food, paper, glass, plastic, metal and some hazardous waste from batteries, rubber, pesticide containers and others.

The city waste management project should consider the proportions of the waste. The proportions of these components vary according to the standard of living, the nature of the climate and many other factors. In some cities, food and paper waste account for a high percentage of household and commercial waste, up to thirty four percent and thirty two percent respectively. The remaining components of such as metals, or plastics, glass, wood and rubber, Paper waste accounts for about forty five percent of the weight of household solid waste due to the high use of paper in the packaging of products.

The city waste management landfills work site usually located in the far distance area about several kilometers from the city center. This waste site is intended for the reception of municipal solid waste only and prevent the reception of the medical, industrial and hazardous waste of all kinds. The total area of landfill area is surrounded by a guard fence. A project to implement of a prefabricated concrete wall will start in addition to the implementation of two main gates for transporting trucks.

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Maintenance of the Mobile Crusher

Mobile crusher need to be routinely maintained to ensure efficient operation. Equipment should be lubricated as required, small and medium-sized equipment is mainly lubricated with grease and lubricating oil, generally have a forced lubrication system, we should always pay attention to observe the oil temperature, oil pressure, flow and other parameters.

We should always pay attention to the equipment noise and vibration during operation.While there is too much noise or vibration should quickly turn off the power to check. After troubleshooting, the load should be started in the boot sequence. In the operation of the equipment, it is also important to observe the quality and yield of the product, when the quality and yield is not normal, there may be some failure of the crusher, the plugging of the sieve, or the screen.

In order to make the equipment to maintain good performance, in addition to normal maintenance, the equipment should also be planned minor repair, repair and overhaul.
The purpose of small repair is to eliminate the equipment in the use of parts caused by local damage, so that equipment back to normal work, and sometimes pre-inspection work for the next minor repair or repair, overhaul to prepare.
The purpose of the repair is to check the important parts of the equipment, the use of parts to replace the parts to solve the problem of uncoordinated service life. In the repair of the entire unit often carry out the entire demolition, cleaning parts, check the various parts of the wear and tear.
Overhaul is the maintenance work carried out when equipment is stopped for a long time. In the overhaul process, all parts must be removed and all parts checked carefully.The method is better in repairing the parts, and the method is carried out under the condition of the equipment operation. The equipment operation rate can be guaranteed accordingly because the complete parts are prepared in advance and the maintenance time is greatly shortened. And the parts are repaired after the equipment is shut down.

The use of linear vibrating screen

The application material size of Winner linear vibrating screen is 0.074-5mm, water content is less than 70%. It is suitable for non-sticky dry power materials, the maximum feeder size is not more than 10mm.
Linear vibrating screen can also be used to filter the liquid. Widely used in wastewater treatment, and also used for screening of large pulverized coal particles class material. When making great material processing, the screen body thickness need to thicken, motor power should be increased and change punching sieve as screen mesh, etc.
Linear screen is widely used in metal power, plastic, abrasive, chemical, medicine, building materials, food, carbon, fertilizer and other industries.

Work Steps and Precautions of Test Sieve Machine

Test sieve machine, also known as standard test sieve, laboratory sieve, analysis sifter, mainly used for the precise detection, screening, filtration and other operations ofthe granular, powdery material particle size structure, liquid solid content and the amount of impurities in the laboratory. It has the advantages of reliable quality, compact design, easy to move, high precision screening, low noise, etc.
Work steps and precautions:
1.Make sure the power and requirements are consistent and make sure to touch the ground.
2.The screen machine must be placed horizontally.
3.The vibration part of the test sieve machine can not be in contact with other objects.
4.Make sure that bolt locking of each component.
5.Select the appropriate standard screen frame for the characteristics of the target screening material, must be fixed by the groove or positioning screw.
6.Sieve frame according to the aperture from small to large, from the bottom to the order in turn stacked on the screen frame bottom base.
7.The height of the adjusting bar is adjusted according to the total height of the screen frame, and the standard sieve frame is positioned and compaction by a press plate and a lock nut, and the force on both sides of the screen frame is consistent.
8.According to the nature of the target material and the amount of processing, set the operating time on the timer, turn on the power, so that the test sieve machine could start to work.

Brief Introduction of Rotary Vibrating Screen

Rotary vibrating screen is a kind of high-precision screening machinery, which is consist of the following parts:
1)Dust-proof cover.
2)Screen box which can be changeable in the number of the layers.
3)One material inlet and several material outlets.
4)Stainless steel screen meshes.
5)Screen mesh frames.
6)Damping springs.
7)Engine base.
8)A vertical vibrating motor with eccentric top weight and eccentric bottom weight installed at the two ends.

There is single or multiple screen meshes of the same diameter in the screen. The specification of the diameter of screen box are as follows: 400mm, 600mm, 800mm, 1000mm, 1200mm, 1400mm, 1600mm, 1800mm, 2000mm. According to different requirements, the material of the screen can be total carbon steel, total stainless steel or stainless steel in the parts contacting material and carbon steel in the other parts.

Working Principle:
There are three kinds of vibration generated in the rotary vibrating screen:
1)Horizontal vibration.
2)Vertical vibration.
3)Inclined vibration.
The trajectories of materials on the screen mesh can be changed by adjusting the relative phase position between the upper and lower eccentric weight which are attached to the ends of the vertical vibrating motor shaft.

The relative phase position between the two eccentric weights can affect the rotational and vibratory mode:
1)Rotation of the upper eccentric weight generates vibration in the horizontal plane, which causes material to move across the screen mesh to the brim.
2)The lower eccentric weight tilts the machine, causing vibration in the vertical and tangential planes.

Application:
1)Pharmaceutical: TCM (traditional Chinese medicine) powder, TCM liquid, western medical powder, western medical liquid, TCM & western medical particles, etc.
2)Food: sugar, salt, soda, MSG (monosodium glutamate), milk powder, soy-bean milk, yeast, juice, soy sauce, vinegar, etc.
3)Paper Making: coating, coated slurry, black-and-white liquid, waste liquor, papermaking liquid, waste water recycle.
4)Chemical: resin sand, pigment, washing powder, micro-powder, paint, soda ash, lemon powder, rubber and plastics.
5)Abrasive & Ceramics: alumina, quartz sand, slurry, atomizing soil particles.
6)Metallurgy: titanium oxide, zinc oxide, electromagnetic materials, metal powder, welding rod powder, etc.
7)Environment Protection: rubbish, excrement, waste oil, food effluent, waste water processing, etc.

Features and benefits:
1)High precision and high efficiency screen applicable to any powder, granule, mucus and so on.
2)New designed frame structure, greater life spans.
3)304 and 316L stainless steel material, easy to clean.
4)Only 3-5 minutes’ replacement of the screen mesh.
5)Fully automated, continuous operation.
6)Fully closed structure, the powder never diffuse into the sky, the liquid doesn't leak.
7)No mesh jam, up to 500 mesh sieving, up to 5 micron filtering.