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Pneumatic conveying system for spraying calcium in stokehole

A technology of pneumatic conveying system and screw conveyor, which is applied in the field of material conveying of gas-solid two-phase flow, can solve the problems of affecting desulfurization effect, waste of desulfurizing agent, uneven feeding, etc., and achieve saving of desulfurizing agent, uniform feeding, Even feeding effect

Inactive Publication Date: 2007-11-21
SINOFINN NEW ENERGY INVESTMENT
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Therefore, this technology has the following disadvantages: 1. Uneven feeding, which affects the desulfurization effect; 2. High energy consumption; 3. Inaccurate measurement, which easily causes waste of desulfurization agent

Method used

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  • Pneumatic conveying system for spraying calcium in stokehole

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Embodiment Construction

[0024] As shown in Figure 1, the calcium spraying pneumatic conveying system in front of the furnace of the present invention is composed of a silo 3, an upper hopper 4, a lower hopper 5, a screw conveyor 1 and a blower fan 2, and the screw conveyor 1 has a feed inlet and an outlet, the fan 2 has an outlet, wherein the upper hopper 4 is arranged above the lower hopper 5, the upper hopper 4 communicates with the lower hopper 5, The silo 3 is arranged above the upper hopper 4, the silo 3 communicates with the upper hopper 4, the lower hopper 5 has a lower hopper outlet, and the lower hopper outlet It is connected with the feeding port of the screw conveyor 1, the discharge port of the screw conveyor 1 is connected with a vertically arranged drop pipe 7 through a horizontal delivery pipe, and the air outlet of the fan 2 is connected with the One end of an air pipe is connected, the other end of the air pipe is connected with the inlet end of a feed pipe 8, the lower port of the d...

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Abstract

This invention relates to a front furnace calcium injection delivery system, which comprises bin, upper bucket, lower bucket, auger conveyor and fan, wherein the outlet of the lower bucket connects with the auger conveyor, and the discharge port of the auger conveyor connects with a vertical cut pipe through a level delivery pipe; the air outlet of the fan connects with one air pipe, and the other end of the air pipe connects with the inlet of the transporting material pipe; the lower end of the cut connects to the transporting material pipe, the auger conveyor is driven by the variable-frequency control motor which is connected with the frequency-changer electric. The control device comprises controlling machine, frequency-changer and sulfur dioxide density sensor, which can control the transporting quantity of limestone powder precisely; the auger conveyor can mix the limestone powder and high pressure draught evenly.

Description

technical field [0001] The invention relates to the material conveying technology of gas-solid two-phase flow, in particular to the technology of spraying calcium to feed circulating fluidized bed boilers and semi-dry desulfurization furnaces, in particular to a pneumatic conveying system for calcium spraying in front of furnaces. Calcium injection pneumatic conveying system for desulfurization in coal-fired power plants. Background technique [0002] In the prior art, in order to control the sulfur dioxide contained in the flue gas emitted by coal-fired power plants, limestone powder is generally used as a desulfurizer. When the limestone powder is sprayed into a specific temperature zone in the furnace, the limestone powder is heated and decomposed into calcium oxide and carbon dioxide. : [0003] CaCO 3 →CaO+CO 2 [0004] Then, calcium oxide reacts with part of the sulfur dioxide and all the sulfur trioxide in the flue gas to form calcium sulfate to achieve the effect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23J7/00F23J15/02
Inventor 李春萱
Owner SINOFINN NEW ENERGY INVESTMENT
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