Claw type vacuum pump

Working principle of claw vacuum pump

The claw vacuum pump has several sets of interlocked claw rotors inside the pump chamber. There is no contact between rotors and between rotors and pump chambers, leaving a small gap without any lubricant, thus ensuring a clean vacuum environment. The structure of the pump adopts a multi-stage rotor interlocking form, with each set of rotors located in different pump chambers and moving synchronously in opposite directions. The pump chamber is divided into two parts, the suction chamber and the exhaust chamber, by a claw shaped rotor. With the continuous operation of the rotor, a cyclic suction and exhaust process is carried out, achieving the purpose of continuous pumping by the pump.

Advantages of Claw Vacuum Pump

1. The biggest advantage is energy conservation, environmental protection, emission reduction, and efficiency improvement. Replacing steam jet pumps, with an effective energy saving rate of over 85% and no wastewater discharge.

2. It has a strong ability to extract condensable gases, including pure solvent gases, and can achieve gas-liquid separation, fine separation, and recycling; It can truly achieve a large amount of liquid discharge, and in actual work, it can discharge liquid while working normally.

3. Obtain a clean vacuum environment. Effectively improve production efficiency and enhance product quality. The sealing form composed of skeleton seal, mechanical seal, and special seal ensures the safe isolation between the pump chamber and the oil tank.

4. The vacuum degree range is wide (105-10-1), it can be started at normal pressure, continuously pumped and discharged directly into the atmosphere, and the vacuum degree can be adjusted according to the user's process environment.

5. Variable frequency drive speed regulation and DCS control, flexible start, low overall impact, long service life.

6. This pump has a non disassembly pump cleaning function. When there is a large amount of dust, viscous substances and other foreign objects during use, the pump can be cleaned in half an hour to meet the factory requirements, and the working condition is stable.

7. Provide users with multiple optional materials according to different working conditions

Pump body materials: gray iron, cast steel, stainless steel

Rotor material: Carbon steel anti-corrosion treatment

Spindle material: 40Cr, 2Cr13

Fully meet the requirements for use in the harshest environments

8. Widely applicable, able to meet the requirements of all production processes such as petrochemicals, pharmaceuticals, electronics, aerospace, nuclear industry, laboratories, etc. It can fully form a vacuum unit with molecular pumps and Roots pumps.

9. This pump can truly achieve a large amount of liquid discharge, and can discharge liquid while working normally in actual operation.

10. Continuous 16000 hours of trouble free operation record, with stable and reliable quality. Maintenance free design, low operating cost.

Comparison of advantages and disadvantages between common non claw pumps and claw pumps

Water ring pump (liquid ring):

Common problem: There is a medium vacuum pump that mixes the pumped material with the medium during operation, resulting in low vacuum degree,

And the cost of material recycling and sewage treatment is high, which can easily pollute the environment.

Claw pump: no medium vacuum pump, clean vacuum and high vacuum degree, can be combined with Roots unit

Obtaining higher vacuum, high material purity and 100% recyclability without pollution, no need for sewage treatment, passing environmental evaluation, and achieving better results in the production and use of pharmaceutical intermediates.

Rotary vane pump:

Common problem: There is a medium vacuum pump that is prone to backflow during operation, and the extracted liquid can condense during operation

The liquefaction of the gas causes a decrease in vacuum degree. Regular replacement of vacuum oil and maintenance costs are required

High.

Claw pump: no medium vacuum pump, clean vacuum, no backflow, centralized drainage during operation

Recycling and centralized processing can maintain a constant vacuum pressure and are free of maintenance costs.

Reciprocating pump (W pump, piston pump):

Common problem: Non medium vacuum pumps have a structure where the relative sliding of cylinders and pistons creates a vacuum environment. When encountering crystalline media in the chemical industry, it can easily cause damage to the piston or cylinder, resulting in production stagnation. same

Not applicable when the extracted gas contains a large amount of liquid.

Claw pump: no medium vacuum pump, no friction structure and variable volume compression type for work

Working principle: When encountering crystalline media in the chemical and electronic industries, it can be smoothly extracted

Besides, it will not cause damage to the pump body.

Steam pump:

Common problems: high energy consumption, low vacuum degree, high cost of sewage treatment, and easy to cause significant pollution to the environment. Steam consumption

Large volume (high operating costs), must be installed at a height of 11 meters or more, inconvenient for maintenance.

Claw pump: energy-saving and environmentally friendly, material recycling can be reused without causing pollution to the environment. At the same time, there is no safety

Install height restrictions.

Vortex pump:

Common problem: Medium free vacuum pump, suitable for cleaning vacuum. But condensable gases in the work environment

The amount of liquid produced by the body should not exceed 25 grams per day. A working environment with dust can easily cause damage to the turbine

Consumption.

Claw pump: No medium vacuum pump, suitable for cleaning vacuum. Condensable gases in the working environment

The generated liquid can be discharged during the operation of the pump without maintenance costs.

Ze series claw type dry vacuum pumps are widely used in various vacuum acquisition environments

Petrochemical industry

Application process:

Processes such as vacuum evaporation, crystallization, distillation, sublimation, drying, negative pressure concentration, dehydration, chemical reaction absorption, and vacuum conveying of materials

Pharmaceutical industry

Application process:

Vacuum evaporation, filtration, monomer recovery, material transportation, distillation, crystallization, sublimation, drying, deodorization and other processes

Electronic industry

processing

Coating, molecular beam epitaxy, ion etching, immersion and other processes

Various laboratories

processing

Can be widely used in various laboratory vacuum acquisition processes, as well as fractionation, distillation, etc

Aerospace industry

processing

Coating, space environment simulation, brazing, electron beam welding and other processes

Metallurgical Industry

processing

Smelting, refining, casting, distillation, steel degassing, and heat treatment processes

Biological industry

processing

Vacuum evaporation, distillation, sublimation, drying, dehydration, preservation, packaging and other processes

Comparison of Annual Operating Costs and Economic Benefits between Steam Jet Pump and Claw Pump in a 100000 ton Aromatic Extraction Unit

project		unit	steam jet pump	Claw pump
Comparison of purchase and operation costs	Purchase cost	Ten thousand yuan	5	50
	steam consumption	Tons/year	2700
	Steam cost	Ten thousand yuan	51.3
	power consumption	KW/h/year		115000KW/year
	electricity bill	Ten thousand yuan		6.9
	Circulating cooling water volume	Tons/year	26280 tons/year	8760 tons/year
	water rate	Ten thousand yuan	2	0.7
	Wastewater treatment capacity	Tons/year	2700
	Sewage treatment fee	Ten thousand yuan	5
	Total operating expenses	Ten thousand yuan	58.3	7.6
	Cost saving comparison	Ten thousand yuan	0	50.7
	Save costs within three years	Ten thousand yuan	0	152.1
	Savings rate	%	0	87%
Cost saving calculation of investment payback period				1 year
Comparison of Recycled Materials	Recovery amount of solvent/gas-liquid mixture	Tons/year	437 (raw material)	547 (aromatic hydrocarbons)
	Market price of solvent/gas-liquid mixture	Ten thousand yuan	131.1	273.5
	Comparison of Recycling Rates	%	100%	209%
	Value of recycled materials	Ten thousand yuan		142.4
	Total value of cost savings and recycled materials	Ten thousand yuan		193.1
Comprehensive calculation of investment payback period				3 months
conclusion		Compared to steam jet pumps, it can increase efficiency in one year193.1Ten thousand yuan/Year.