Stainless Steel Positive and Negative Pressure Protector for Biogas Digester

• Customization: Available
• After-sales Service: 1 Year
• Warranty: 1 Year
• Model NO.: Pressure Protector
• Certification: QS, ISO, CE
• Automation: Automatic
• OEM: OEM or Customized
• Material: Stainless Steel
• Volume of Tank: 100-5000m3
• Noise Level: Ultra Quiet
• Purpose: Safety Protection
• Transport Package: Export Standard Packing
• Specification: customized
• Trademark: RELY
• Origin: Qingdao China
• HS Code: 84213990
• Production Capacity: 3600sets/Year
• Package Size: 100.00cm * 100.00cm * 100.00cm
• Package Gross Weight: 50.000kg
• Lead Time: 10 days (1 - 10 Pieces) ; To be negotiated ( > 10 Pieces)

Product Description

 

Product Description

 

 

The positive and negative pressure protector is mainly used to eliminate excessive pressure or negative pressure in equipment under abnormal working conditions to ensure safe operation of the equipment.

If condensed water is generated, it will automatically drain. When the pressure exceeds 2000Pa, it will automatically exhaust. When it is lower than 300Pa, it will automatically adjust the suction to ensure that the equipment will not have negative pressure and ensure safe operation of the equipment.

The equipment is equipped with special antifreeze to solve the problem of normal use in cold areas

 

Working Principle

There is a certain depth of water seal inside the positive pressure protector to prevent biogas leakage and relieve pressure. When the anaerobic tank is fed and stirred, the gas production suddenly increases and the pressure increases. The water level in the central pipe drops and biogas escapes from the lower end of the central pipe and is discharged into the atmosphere through the chimney on the side wall.

There will also be a water seal inside the negative pressure protector. When the pressure inside the tank is within the normal range, the pressure inside the tank will press against the sleeve, then air cannot enter. When the anaerobic tank discharges liquid and mud, it will cause the liquid level inside the tank to rapidly drop, forming negative pressure. The external pressure is greater than the internal pressure and the float rises. After the float leaves the water surface, air enters and the internal and external pressure is balanced.
 

 

Usage Instructions

 

(1) When the anaerobic tank has a rigid top, the selected positive and negative pressure protector model is 4kpa type. Positive and negative pressure protectors are usually installed at the top of the tank, with a positive pressure protection pressure of 2.5 kPa and a negative pressure of 500 Pa.

The conversion relationship for water seal depth is that 1cm water column corresponds to a pressure of 100pa. There is a DN20 inlet at the top of the protector and the glass liquid level indicator tube on the side of the protector is observed. The positive pressure water level is between 20cm and 30cm  and the negative pressure water level is around 12-19cm. The upper and lower fluctuations should not be too large, and the water level should be added as accurately as possible.

(2) When the anaerobic tank is membrane top, the positive and negative pressure protector model selected is 500pa. Generally installed on a 3m platform on the tank side, the positive pressure water level (level gauge water level height) should be around 5cm, and the negative pressure water level (level gauge water level height) should be around 7cm. The up and down fluctuations should not be too large, and the water level should be added as accurately as possible.

(3) Due to factors such as water evaporation, it is necessary to regularly inspect the liquid level height inside the glass level indicator tube. When the water level is below the required height, water should be injected into the protector and observed at all times to prevent excessive water from being added.

(4) The winter in the north is cold, so when adding water, an appropriate amount of car antifreeze should be added to ensure that the protector starts and runs normally.

Product Parameters

  

 

No	Model No.	Anaerobic Fermentation Tank Volume(m3)	Material
1	DN50	100~500	SUS304/Carbon Steel
2	DN65	500~1000	SUS304/Carbon Steel
3	DN80	1000~2000	SUS304/Carbon Steel
4	DN100	2000~3000	SUS304/Carbon Steel
5	DN125	3000~4000	SUS304/Carbon Steel
6	DN150	4000~5000	SUS304/Carbon Steel

Comprehensive Biogas Projects

 

Company Profile

We, Qingdao Rely Environmental Technology Co., Ltd., established in 2015, is a comprehensive environmental enterprise, included product research, process design, system integration, equipment manufacturing, project construction and technical services. We committed to become a professional and reliable supplier of water treatment and organic waste solutions.

The products are widely used for drinking water treatment, industrial water treatment, domestic sewage water treatment, industrial sewage treatment, air pollution control, organic waste treatment and so on. Also supply environmental and efficient water treatment chemical products.

We have good long-term cooperation with Chinese well-known universities and research institutes, assure our strong technical strength and acquired series of technical patent. Our teammates have rich experience and already completed over 100 projects in domestic and foreign, gained highly reputation from local citizens and governments. In Asia, African and South American market, we have made several big landfill leachate treatment projects, treatment capacity from 100MT to 400MT, because of reasonable design, advanced equipment and high level construction, all projects run stable and efficient, proved our strong technical strength and high quality level.

With strong technical strength, we are not only a reliable equipment supplier, but also undertake EPC general contracting projects, EPC Service offered as the following.

1) Freely Preliminary Technical Consultation

2) Treatment Process design

3) Comprehensive Project Equipment Supply

4) Installation Technical Support

5) Debugging Technical Support

Warmly welcome to cooperate with us, for cleaner water, fresher air, more blue sky and more beautiful home!

 

World Class Partners

 

World Class Technology Partners



World Class Device Partners


World Class Business Partners

 

Certifications

 

 

FAQ
 

1. Q: What fields is the positive and negative pressure protector mainly used in?
A: The positive and negative pressure protector is a kind of safety protector installed on biogas fermentation tank. When the positive or negative pressure of tank exceeds the limit, the protector could act to prevent occurrence of safety accidents. When positive pressure of tank exceeds the limit, the protector could act to relieve the pressure to prevent explosion of tank and when negative pressure of tank exceeds the limit, the protector could act to prevent implosion caused by atmospheric pressure.

2. Q: What information do we need before ordering?
A1: Pls advise the volume of the anaerobic fermentation tanks.

3. Q: How long is your lead time?
A: Generally it is 10-25 days, depends on your needs and project scales.

4. Do you provide OEM service?
A: We provide high-quality OEM services, and also provide buyers customized products.

5. What other services can you provide?
A: Provide free technical support at any time, and also can help you design the whole treatment process of the project.