Chain boiler for recovering carbon with cinder

Abstract

The invention discloses a chain boiler for recovering carbon with cinders, comprising a hearth, a cinder intake system and a carbon recovery system, wherein the cinder intake system comprises a cinder intake funnel, a rotary drum with positive electricity and a rotary drum with negative electricity, wherein the cinder intake funnel is provided with a rotationally stirring rod; a bottom plate of the cinder intake funnel is provided with a plurality of cindering slits; the rotary drum with the positive electricity and the rotary drum with the negative electricity are parallelly arrayed below the cinder intake funnel; a cinder collecting box and a carbon granule collecting box are respectively arranged below the rotary drum with the positive electricity and the rotary drum with the negative electricity; the sharing wall of the two collecting boxes is provided with a front scraping plate and a rear scraping plate; the front scraping plate contacts with the rotary drum with the positive electricity; the rear scraping plate contacts with the rotary drum with the negative electricity; the carbon recovery system comprises a fan cover, a delivery pipe and an ejector, wherein the fan cover is positioned above the carbon granule collecting box and communicated with one end of the ejector through the delivery pipe; the other end of the ejector is connected with an rear arch by using the delivery pipe; and the rear arch is communicated with the hearth. The invention has high fuel burning degree and heat efficiency and can be widely used in the field of boiler equipment.

Description

technical field [0001] The invention relates to a chain boiler, in particular to a chain boiler with ash carbon recovery. Background technique [0002] Petroleum coke is a by-product of the coking process in the oil refining process. Its appearance is irregular, metallic luster, black or dark gray porous solid particles with a well-developed void structure. Petroleum coke contains higher carbon content, lower ash content and volatile matter yield. [0003] There are many ways to classify petroleum coke. According to the different microstructure, petroleum coke can be divided into needle coke and spherical coke. According to different production processes, petroleum coke can be divided into delayed coke, fluidized coke and kettle coke. The main variety of petroleum coke in my country is delayed coke, and the proportion of fluidized coke and kettle coke is very small. [0004] The coke residue produced by the delayed coking process of heavy oil after crude oil distillation...

AI Technical Summary

Problems solved by technology

[0008] However, the ignition condition of the chain boiler is relatively poor, and the ignition is limited by the moving speed of the grate and the thickness of the coal seam: if the coal seam moves too fast, the ignition position will move backwards and cause too much incomplete combustion loss; if the coal seam is too thick, the lower part of the coal seam Ignition will be delayed and also cause excessive incomplete combustion losses

Therefore, it is more difficult to ignite coal with less volatile content, more ash and more moisture.

At the same time, due to the combustion method of the chain boiler, the efficiency of the chain boiler is low, and the thermal efficiency of a large part of the chain boiler is only 60% to 70%, and the carbon content of the slag is very high, resulting in a serious waste of resources.

[0009] Due to the low volatile content of petroleum coke, when it is used in chain boilers, it may cause difficult ignition and low burnout degree, and the ash content of petroleum coke is low. The carbon content in the ash after combustion accounts for a high proportion, which seriously affects the economy.

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