Shanghai Tianli: Working principle of filter press

Tianli Filter Press Co., Ltd. was founded in 1986, specializing in the production of "Tianli" brand filter equipment, China General Machinery Industry Association Separation Machinery Branch enterprise member unit, ISO9001 quality management system certification enterprise. In the past 20 years, we have always carried forward the spirit of "striving for innovation and forging ahead" and adhered to the management policy of "people-oriented, science and technology ling first" and won many honors. It has been rated as "AAA" enterprise, "user trustworthy unit" and " Star enterprises, etc., have obtained a number of national patents. Tianli filter press has two factories in Wenzhou and Shanghai, with a production area of ​​more than 80,000 square meters. Tianli filter press takes the market as the forerunner, adheres to the combination of independent development and introduction of advanced technology at home and abroad, and relies on a wide range of human resources and strong technical strength, and is committed to the research and development and manufacture of filtration equipment.

The hydraulic pressure clamping mechanism of the filter press consists of a hydraulic station, a cylinder, a piston, a piston rod and a hydraulic shaft of the Haveland card hydraulic pump connected to the pressure plate. The motor, the oil pump and the relief valve are adjusted. Directional valve, pressure gauge, oil circuit, fuel tank.

When the hydraulic pressing machinery is pressed, the hydraulic station supplies high-pressure oil, and the component chamber formed by the cylinder and the piston is filled with oil. When the pressure is greater than the frictional resistance of the pressing plate, the pressing plate slowly presses the filter plate, when the pressure is pressed. When the tightening force reaches the pressure value set by the relief valve (displayed by the pressure gauge pointer), the filter plate, the filter frame (plate frame type) or the filter plate (box type) is pressed, and the relief valve begins to unload. When the motor power is cut off, the pressing action is completed. When retracting, the reversing valve is reversing, and the pressure oil enters the rod cavity of the cylinder. When the oil pressure can overcome the frictional resistance of the pressing plate, the pressing plate begins to retreat.

When the hydraulic pressure is automatic pressure holding, the pressing force is controlled by the electric contact pressure gauge, and the upper limit pointer and the lower limit pointer of the pressure gauge are set to the values ​​required by the process. When the pressing force reaches the upper limit of the pressure gauge, the power supply When the oil pump stops, the oil pump stops supplying power. The pressure is reduced due to the internal leakage and external leakage that may occur in the oil circuit system. When the pressure is lowered to the lower limit of the pressure gauge, the power is turned on, the oil pump starts to supply oil, and when the pressure reaches the upper limit, the power is cut off. The oil pump stops supplying oil, and this cycle is used to achieve the effect of ensuring the pressing force during the process of filtering the material.

Filtration method: The way the filtrate flows out is clear flow filtration and dark flow filtration. For the clear flow filtration, a water nozzle is arranged on the lower liquid outlet of each filter plate, and the filtrate flows out intuitively from the water nozzle. Under the dark flow filtration, a liquid outlet hole is arranged below each filter plate, and the liquid outlet holes of the plurality of filter plates are connected into a liquid outlet passage, which is discharged by a pipe connected by a liquid outlet hole below the thrust plate.

Washing method: When the filter cake needs to be washed, it sometimes flows in one-way washing and two-way washing, undercurrent one-way washing and two-way washing. The clear flow one-way washing is that the washing liquid enters sequentially from the washing liquid inlet hole of the thrust plate, passes through the filter cloth and then passes through the filter cake, and flows out from the non-porous filter plate, and at this time, the liquid discharging nozzle of the orifice plate is closed. The outlet nozzle of the non-porous plate is open. The clear flow two-way washing is that the washing liquid is washed twice from the washing liquid inlet holes on both sides above the thrust plate, that is, the washing liquid is first washed from one side and then washed from the other side, and the outlet of the washing liquid is diagonal with the inlet. Direction, so it is called two-way cross washing. The dark flow unidirectional flow is that the washing liquid enters the perforated plate from the washing liquid inlet hole of the thrust plate, passes through the filter cloth and then passes through the filter cake, and flows out from the non-porous filter plate. The undercurrent two-way washing is that the washing liquid is washed twice from the two washing liquid inlet holes on both sides above the stopper plate, that is, the washing is first washed from one side and then washed from the other side, and the outlet of the washing liquid is diagonally oriented. So it is also called undercurrent two-way cross washing.

Tianli main products: reinforced polypropylene chamber filter press, plate and frame filter press , automatic pull-box filter press, diaphragm chamber filter press, sealed box filter press , rice wine press, plateboard Filter (ZL200820081888.6), stainless steel plate and frame filter press, stainless steel diatomite filter, vertical high-precision filter (bearing super essential oil filter ZL2005201017345), vertical press (ZL200820081887.1) and so on.

Dispersant N

1. Chemical Composition:sodium methylene bis-naphthalene sulfonate
Appearance: beige brown powder
Solubility: soluble in water of any hardness
PH value: in 1% water solution, PH = 7-9
Performance: good diffusion and protective colloid, and no penetration and foaming .
Ion: anionic.
Stability: resistance to acid, alkaline, hard water, salt.

Affinity: have an affinity for protein and polyamide fibers, for cotton, hemp and other fibers no affinity.

Miscibility: may mix with anionic and non-ionizing surfactant simultaneously.

Dispersant N
2. Specifications indicators

Items

Indicators

Type

First Grade

Qualified

Appearance

Beige brown powder

Beige brown powder

Dispersancy (Standard substance)

≥100%

≥95%

PH Value (1% water solution)

7-9

7-9

Sodium sulfate content

≤3%

≤5%

Fineness (residuals of 60 mesh/screen)

≤5%

≤5%

Calcium and magnesium ions, Ppm≤

1000

4000

Impurities (non soluble in water)

0.05%

0.10%

Dispersant N

3. Application
Printing and dyeing industry: mainly used for dyeing vat dyes suspension, leuco acid staining, dispersion and soluble vat dyes dyeing. Also be used for silk / wool interwoven fabric dyeing, the yarn is no color. Mainly used for industrial dye dispersion and diffusion of color lakes manufacturing additives.
Building materials industry: as early strength cement water reducing agent, the amount of 0.5-1% by cement after the shock has good dispersion effect, increasing the strength of cement. Diffused N of concrete tensile strength, impermeability, frost and compressive modulus of elasticity are improved, no corrosion of steel effect.
Pesticide industry: It can be widely used in wettable pesticides, with good dispersion and solubilization, can significantly improve the efficacy, dosage according to product requirements. Example: buprofezin, the amount of 3-5 %; thiophanate amount of 0.8-1.5 %, 0.8-1 % Kai Ling vegetables.
Electroplating industry: the color is added, crossing pigment dispersants N allows uniform dispersion can significantly improve the plating surface brightness, and the amount is usually 10% of the pigment.
Rubber industry: rubber (latex) of industrial production process, the dispersed substances such as sulfur accelerator, antioxidant zinc oxide fillers ( such as barium sulfate , calcium carbonate ), etc., added to the dry weight of a dispersing agent N2-4% , 10% dispersant solution prepared in advance , and along with the other components in a ball mill grinding , can improve the dispersion effect and shorten the milling time .
Packing: 25kg bags.
Storage: two years and must be upload and download lightly.

Dispersant N,Dispersant,Dispersing Agent Nno,Dispersing Agent

Shandong Tiancheng Chemical Co., Ltd. , https://www.tianchengchemical.com