Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Shaft seal structure of centrifugal coal slurry pump

A coal slurry pump, centrifugal technology, applied in non-variable volume pumps, pumps, components of pumping devices for elastic fluids, etc. Consumption, disadvantages and other problems, to achieve the effect of ensuring long life, obvious interface and long life

Active Publication Date: 2017-03-15
CHINA CHENGDA ENG
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in actual use, in order to prolong the life of the mechanical seal, the amount of flushing water entering the pump often exceeds 500ml, which is not good for the coal gasification process, and increases the load and oxygen consumption of the coal gasifier, such as flushing water pressure and seal oil pressure. Control error, there is a risk of water entering the double seal, shortening the life of the rolling bearing in the middle of the double seal

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Shaft seal structure of centrifugal coal slurry pump
  • Shaft seal structure of centrifugal coal slurry pump
  • Shaft seal structure of centrifugal coal slurry pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] The present invention will be described in detail below with reference to the accompanying drawings.

[0037] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0038] like image 3 As shown, the shaft seal structure of the centrifugal coal slurry pump includes the back vane 5 of the main impeller 1, the baffle 2, the fixed guide vane 3, the auxiliary impeller 4, the mechanical sealing part and the sealing liquid tank part. In the auxiliary impeller 4 A blade 6 is arranged on the upper part, a pump cover 32 is arranged above the auxiliary impeller 4, the partition plate 2 is fixedly connected with the pump cover 32, the fixed guide vane 3...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a shaft seal of a centrifugal coal slurry pump of a coal water slurry gasification device. For overcoming the defect that a mechanical seal of a centrifugal low-pressure coal slurry pump in the prior art is not long in service life and cannot completely prevent external flushing water from flowing into the pump, three to five spacing rings are added on a back blade and blades of an auxiliary impeller of the shaft seal to weaken harmful radial flows in a flowing channel and increase a blocking lift of high-viscosity coal slurry. An external area of an auxiliary impeller cavity is a large-specific-gravity coal slurry ring, an internal area of the auxiliary impeller cavity is a small-specific-gravity oil ring, and the interface of the two areas is obvious and stable. PLAN23 single-end-face mechanical seal and an improve liquid seal tank are adopted to enable the auxiliary impeller cavity, a mechanical seal cavity and the liquid seal tank to be communicated, it can be monitored that the coal slurry is away from the mechanical seal in a central control room and a field, long service life is ensured, and external flushing water is not needed completely during normal operation. The shaft seal is suitable for the centrifugal coal slurry pump of which the conveying solid content is 58-61 wt% and the viscosity is 700-3000 mPa.s and is also suitable for other high-viscosity centrifugal pumps with high conveying solid content.

Description

technical field [0001] The invention relates to a shaft seal structure of a centrifugal coal slurry pump with a solid content of 58-61wt% and a viscosity of 700-3000mPa.s in a coal-water slurry pressurized gasification device, in particular to a shaft seal of a coal mill discharge trough pump It is also suitable for the shaft seal structure of centrifugal pumps for conveying high solid content and high viscosity media in other industrial devices. Background technique [0002] In the past ten years, due to the continuous rise of oil prices and the resource structure of my country's lean oil, little gas, and rich coal, it has been decided that "replacing oil to coal and gas to coal" is a major national strategic policy. Therefore, coal is used as raw material for production. Modern coal chemical industries such as methanol, olefins (MTO), natural gas and coal-to-liquids have developed rapidly. Coal gasification is the leader of modern coal chemical industry. Coal water slurry ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/10
CPCF04D29/106F04D29/108F04D29/2266
Inventor 魏宗胜魏绍俊漆明贵
Owner CHINA CHENGDA ENG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products