What type of pump is suitable for transporting methanol and formaldehyde?
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Dear colleagues: The company has recently installed a methanol distillation unit, and I am tasked with selecting a pump for transporting solutions containing methanol and formaldehyde (with a flow rate of 3.0 m3 and a pressure of around 1.5 MPa). I’m wondering whether a canned motor pump can be used, and how to determine the appropriate model Is there a more suitable pump?
The main consideration is preventing leaks; the most commonly used pumps are shielded pumps and magnetic pumps
Both plunger pumps and centrifugal pumps work.
As long as it is a corrosion-resistant centrifugal pump, a canned motor pump will work just fine
We use only centrifugal pumps; as long as they are corrosion-resistant, that’s enough. Leakage is a secondary concern, since there are backup pumps available
As long as it is a corrosion-resistant centrifugal pump, any shielded pump will do; the motor must be explosion-proof
Considering the special properties of methanol, the primary concern is preventing leaks, followed by corrosion protection (after all, its corrosiveness is quite low), and thirdly, explosion prevention (in case there is a methanol leak). Magnetic drive pumps and canned motor pumps are, in theory, the two types of pumps that can prevent leaks at present. It is advisable to use magnetic drive pumps or canned motor pumps made from corrosion-resistant materials, and it is important to choose manufacturers with a good track record who can ensure quality ； The motor is an explosion-proof motor, from Nanyang or Jiamusi. This post was last edited by Pioneering Spirit on 2007-12-15 08:57.]
We are all shielded pumps: leak-free, requiring no lubrication, compact in size, low in noise, with few problems, and easy to use. :victory:
We are all shielded pumps: leak-free, requiring no lubrication, compact in size, low in noise, with few problems, and easy to use. :victory:
The price of shielded pumps is way too high. I inquired, and the ordinary ones from Dalian Empire cost over 18,000 yuan, while centrifugal pumps can solve the problem for just 3,000 yuan. .
A corrosion-resistant centrifugal pump will do; it requires low investment and is easy to operate! Applicable! Many factories choose centrifugal pumps for transporting methanol; it’s sufficient for the motor to be explosion-proof!
Now, many chemical plants use centrifugal pumps. . . . Special considerations for special areas
Our factory uses centrifugal pumps, which perform very well. It’s sufficient to use explosion-proof motors for the pumps. As for leakage issues, there’s not much of a problem; try to avoid switching to backup pumps frequently, as this can extend the period without leakage and reduce the need for maintenance. Even if the maintenance costs are not high, since they are domestic products, simply replacing the seal will do. :loveliness: :loveliness:
For the methanol and dimethyl ether we produce, magnetic pumps, shielded pumps, or rotary vane pumps are used, with explosion prevention and leakage prevention being the main considerations!
For low-concentration formaldehyde solutions, a shielded pump can be considered; for high-concentration solutions, a centrifugal pump is more appropriate.