High outlet temperature of the gear pump circulation pump
Thread Content
During the normal operation of the gasifier, what could be the reason for a sudden increase in the temperature at the outlet of the lockhopper circulation pump? The temperature inside the lockhopper is around 60 degrees, but the temperature at the outlet of the pump rises to around 120 degrees. What is the cause of this? This post was last edited by Langtaosha on 2008-12-3 00:38.]
Is the temperature high at the top of the lock cylinder? If the temperature at the outlet of the lockhopper circulation pump is high and the temperature at the upper part of the lockhopper is also high, it indicates that either the pressure relief valve or the check valve is leaking. However, the person who posted the question said that the temperature of the lockhopper is 60 degrees, with only the temperature at the outlet of the lockhopper circulation pump being high. It must be water leaking from the vaporizer; this indicates that there is a internal leak in the valve located on top of the lockhopper. It’s possible to test each valve individually to identify the one with the problem.
Lockhopper circulation pumps are generally installed at the top of the lockhopper. When transitioning from small-scale circulation to large-scale circulation, a small amount of gas is present, which may cause the pump to operate with gas in it for a short period of time, leading to an increase in the temperature at the pump’s outlet.
Going back upstairs: if there’s pressure, can the liquid level in the vaporization furnace still be maintained? There are things that can’t be based solely on guesswork; there must be evidence.
Let me add that it was due to a sudden significant change in the quality of the coal, which caused the ash melting point to increase. But why was there such a large change in the temperature at the outlet of the lock-hopper circulation pump?
1. Since the ash has a high fusion point, it is necessary to raise the furnace temperature, which in turn increases the water temperature in the quenching chamber. As a result, the outlet temperature of the lock-hopper circulation pump will inevitably be higher as well. 2. Your coal has changed; it’s possible that the quality of the coal has deteriorated. In this way, the amount of slag removed will increase, which in turn leads to more heat being carried away from the quenching chamber. As a result, the outlet temperature of the lockhopper circulation pump will inevitably rise as well. Solution: 1. Reduce the slag discharge time. 2. Refill the lockbox flushing water tank with cold water. This post was last edited by Langtaosha on 2008-12-3 00:39.]
If there are problems with slag discharge from the gasification furnace, one can refer to another temperature point on the lockhopper. Generally, there are two temperatures on the lockhopper – one at the top and one at the bottom. If it is only the temperature at the upper part of the lockhopper and at the outlet of the lockhopper circulation pump that increases significantly, then it’s clear that the slag isn’t being discharged, in my humble opinion.
We’ve had this problem too; it’s probably the intake pipe that has fallen off. This post was last edited by Langtaosha on 2008-12-3 11:23.]
As the slag collection time increases, the temperature of the lock hopper gradually rises. However, if only the outlet temperature of the circulation pump increases, the possible reasons are: 1. A malfunction in the thermometer, resulting in false readings ； 2. Internal leakage in the lockhopper slag discharge valve allows the black water from the gasification furnace to enter the lockhopper during slag discharge ； (This really has nothing to do with the high temperature at the upper part of the lock; the Super Edition of Langtaosha was right in its criticism – one should no longer assume things when expressing opinions!) Hehe, I’m ashamed! ) 3. Leakage in the pressure charging valve, allowing process water to enter the lock hopper. This post was last edited by xuqinger on 2008-12-3 21:29]
The specific time at which the temperature rises needs to be clarified: whether it is after slag discharge or during slag collection
As a supplementary note: Based on what you’ve described, it’s possible that 1) the flow-limiting orifice plate at the outlet of the gear pump has worn out, resulting in an increased flow rate at the pump outlet. 2. Internal leakage in the flushing water valve. 3. The slag particles discharged are relatively large.