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A slurry circulation device and scheduling method

A dispatching method and slurry circulating pump technology, applied in the field of desulfurization, can solve the problems of many renovations and large investment

Active Publication Date: 2021-04-09
DATANG ENVIRONMENT IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this scheme is that the power saving effect is obvious, and the inverter room needs to be added; the disadvantage is that the foundation of the circulating pump needs to be modified, and the modification content is relatively large, and the investment is relatively large

Method used

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  • A slurry circulation device and scheduling method
  • A slurry circulation device and scheduling method
  • A slurry circulation device and scheduling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Example 1, such as figure 1As shown, a slurry circulation device includes a permanent magnet synchronous variable frequency motor 1, a coupling 2, and a slurry circulation pump 3;

[0059] The permanent magnet synchronous frequency conversion motor 1 is connected to one end of the coupling 2, and the other end of the coupling 2 is connected to the slurry circulation pump 3;

[0060] The slurry circulating pump 3 is connected with the slurry spraying system of the desulfurization absorption tower;

[0061] The slurry spray system is equipped with desulfurization nozzles;

[0062] The permanent magnet synchronous frequency conversion motor 1 and the slurry circulation pump 3 are fixed on the base 5 by fixing bolts 4;

[0063] The permanent magnet synchronous frequency conversion motor 1 is tightly connected with the shaft coupling 2, and the shaft coupling 2 is tightly connected with the slurry circulation pump 3.

[0064] The supporting motor is a permanent magnet syn...

Embodiment 2

[0066] Embodiment 2, a scheduling method of a slurry circulation device, the scheduling method adopts the slurry circulation device described in the first embodiment.

[0067] The relationship among the power, head and flow of the permanent magnet synchronous variable frequency motor 1 is:

[0068] Flow proportional law Q 1 / Q 2 =n 1 / n 2 ,

[0069] Head proportional law H 1 / H 2 =n 1 / n 2 2 ,

[0070] Shaft power proportional law P 1 / P 2 =n 1 / n 2 3 ,

[0071] Among them, n 1 , n 2 is the speed of permanent magnet synchronous variable frequency motor 1, Q 1 , Q 2 is the flow rate of permanent magnet synchronous variable frequency motor 1, H 1 、H 2 is the head of permanent magnet synchronous variable frequency motor 1, P 1 ,P 2 is the shaft power of the permanent magnet synchronous variable frequency motor 1;

[0072] Due to the above relationship, the slurry circulation pump can adjust its flow rate and head by adjusting the speed to achieve energy sa...

Embodiment 3

[0108] Embodiment 3 is different from the second embodiment in that step 6 is replaced by determining the motor frequency adjustment value according to the total lift reduction:

[0109] a. If the permanent magnet synchronous variable frequency motor 1 has residual power on the basis of the original design, and the frequency of the permanent magnet synchronous variable frequency motor 1 increases appropriately, the flow rate of the slurry circulation pump will also increase, and the increase in flow rate can meet the operating requirements without a new start A slurry circulation pump, this part can save a certain amount of energy, according to the total head reduction ΔH, determine the adjusted slurry circulation pump shaft power P 2 ,

[0110]

[0111] Among them, P 1 is the shaft power of the slurry circulation pump 3 before adjustment;

[0112] b, according to P 2 and P 1 , to determine the operating frequency F of permanent magnet synchronous variable frequency mot...

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Abstract

The invention proposes a slurry circulation device and a scheduling method. The slurry circulation device includes a permanent magnet synchronous frequency conversion motor, a coupling, and a slurry circulation pump. The scheduling method includes calculating the head reduction of the slurry circulation pump, the flow rate of the slurry circulation pump, and the frequency adjustment of the motor. value and adjust the motor frequency, through the slurry circulation device and scheduling method, it solves the problem that due to the fluctuation of the operating load of the power plant unit, the sulfur content of the coal quality deviates from the design value, which leads to the deviation between the design and actual operation of the slurry circulation pump To solve the problem, the foundation of the circulating pump is not modified, the investment is small, and the effect of accurately controlling the operation of the slurry circulating pump can be achieved, which can realize energy saving and consumption reduction in unit operation, and reduce on-site operating costs.

Description

technical field [0001] The invention relates to the technical field of desulfurization, in particular to a slurry circulation device, and in particular to a slurry circulation device and a scheduling method. Background technique [0002] In the whole desulfurization system, if the desulfurization agent is limestone powder, the power consumption of the slurry circulation pump accounts for 76% of the desulfurization system; if the desulfurization agent is limestone, the power consumption of the slurry circulation pump accounts for 65% of the desulfurization system, and the power consumption of the slurry circulation pump Electricity consumption accounts for a relatively large proportion in the electricity consumption of the desulfurization system, so energy saving and consumption reduction are of great significance. [0003] Since the power plant unit cannot operate at full load for a long time, the sulfur content of the coal quality deviates greatly from the design value, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/80B01D53/50B05B12/08
CPCB01D53/502B01D53/504B01D53/80B01D2251/404B01D2251/606B05B12/082B05B12/085
Inventor 汪作胜刘忠张成虎白玉勇王凤荣谷小兵李广林杨卫科陈海杰李文龙杨春雨卫耀东罗平程志会王志刚魏新孙健
Owner DATANG ENVIRONMENT IND GRP