CN2837686Y

CN2837686Y - Coal-fired boiler with screw conveyor

Info

Publication number: CN2837686Y
Application number: CN 200520021468
Authority: CN
Inventors: 魏景才
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-08-19
Filing date: 2005-08-19
Publication date: 2006-11-15
Anticipated expiration: 2015-08-19

Abstract

The utility model aims at disclosing a screw type coal burning furnace which has the advantages of fund saving and cost reduction and achievement of the discharge standard required by the national environmental protection; the practices prove that the operation is good, and the utility model is favorable for users, relevant experts and environmental protection departments. The utility model is composed of a furnace body, a coal supply system and a wind supply system, wherein the coal supply system and the wind supply system are arranged on the lower part of the furnace body. The utility model is characterized in that a screw device is arranged under a coal feed funnel and extends into a combustion chamber; a motor 4 is arranged on a device bottom plate 5 and is connected with a speed reducer 6 by a transmission belt; an output shaft of the speed reducer 6 simultaneously drives a spindle gear 24 and a transmission shaft 3 connected with a gearbox 2 arranged on the lower bottom part of the combustion chamber 26, and an output shaft of the gearbox 2 is connected to a stirrer 17 arranged in a coal burning layer. The wind supply system comprises a blower 8, and the output end of the blower is connected with a wind blowing pipe 9 at the bottom of the combustion chamber and a secondary main wind pipe 10 on the upper part of the combustion chamber; accordingly, the wind supply system of first and secondary wind blowing is formed.

Description

The auger type coal furnace

Technical field:

The utility model is the coal-burning boiler that a kind of heating and bathing are used.

Technical background:

The boiler major part that the heating stove of society's use at present and bathing are used is the early stage handwarmer of producing, and multiple pattern boilers such as vertical single backhaul, two backhaul, three backhauls are arranged, but all have a common shortcoming: dust concentration is big.Particularly in coal in burner hearth and poke, produce a large amount of black smokes, cause emission not reach national environmental standard, the Lin Geman severe overweight.Various measures to rectify and reform have been taked in order to solve this difficult problem in various places, change boiler, even the vertical boiler that indivedual area requires bathing to use is replaced with the moulded coal stove without exception.Though the moulded coal stove has solved emission problem, also there are a lot of shortcomings, such as: the molded coal boiler programming rate is slow, the temperature instability, and when load was big, temperature can not fast lifting, the use water temperature that can not meet the demands; With diffusing coal facies ratio, moulded coal price height; Fireman's labour intensity is big; Moulded coal stove cost height, 0.3 ton one 0.4 tons its costs of moulded coal stove are ten thousand yuan of 3-7, cause great financial burden to the user when changing.

Summary of the invention:

The utility model purpose is to disclose a kind of auger type coal furnace, economizes on the use of funds, reduces cost, reaches the discharge standard of national requirements for environmental protection, facts have proved that operational excellence is welcomed by users and the favorable comment of relevant expert and environmental administration.

The utility model is by body of heater with at the coal-supply system of body of heater bottom, air feed system is formed, coal-supply system is installed in combustor body 1, it is characterized in that: described coal-supply system comprises, below last coal coal bunker 20 and extend into screw conveyer device in the combustion chamber 26, auger main shaft 22 is contained in the auger cylinder 21, connect through screw-conveyer-shaft flange 23 and the mainshaft gear that is installed on the auger main bearing shell seat 25, main bearing shell seat 25 is installed on watt seat support 7, a motor 4 is installed in equipment bay 5, be connected with reductor 6 through driving belt, reductor 6 output shafts are drive shaft gear 24 and power transmission shaft 3 simultaneously, power transmission shaft 3 connects gearbox 2, gearbox 2 is installed in the lower bottom part of combustion chamber 26, and its output shaft is connected to the agitator 17 that is installed in the burning coal layer; Described air feed system comprises: an air blast 8, the blower fan output connects combustion chamber bottom ajutage 9 and top, combustion chamber secondary air main 10, secondary air main 10 is connected to secondary wind bellows 11, bellows connect a plurality of the

wind airduct

12 and 19 of its air outlet in the combustion zone respectively, above burner hearth that refractory brick 14 is built into is combustion chamber

heat insulating belt

13 and 18, bottom, combustion chamber ajutage 9 is connected to combustion chamber bellows 16, a plurality of combustion chamber tuyeres 15 that are distributed in the burner hearth communicate with the combustion chamber bellows, form the air feed system of a secondary blast therefrom.

Description of drawings

Fig. 1 is the utility model principle assumption diagram;

The specific embodiment:

Combustion furnace is that a complete automated machine burns stove, and the boiler fire bars that moves is originally removed, and the following chassis of circle of then boiler being got a foothold keeps 20MM, and all the other slice off, and then the boiler integral installation are promptly constituted in the coal furnace top.This coal furnace has four systems respectively, i.e. transmission system, air feed system, combustion system, coal supply system, stove outer covering and equipment bay and spindle carrier.The operator shifts the coal strand in the combustion chamber onto by coal supply system, toward delivering coal in the combustion chamber when, drives agitator 17 by transmission system and rotates, and the coal of combustion chamber is stirred, and does not depart from when making its burning, the poly-heap.In the combustion chamber coal reach a certain amount of can be in combustion chamber upper face igniting, by air feed system respectively to combustion chamber air-supply oxygen supply.Bellows 16 tuyere figure in combustion chamber are made up of 5 tuyeres respectively, are evenly distributed in the burning pelvic cavity.Inferior wind airduct 12 is made up of three airducts, main effect is to top, combustion chamber oxygen supply, just coal can burn fully in the combustion chamber, its combustion system is exactly to burn from lower to upper, and the effective so a large amount of black smoke that has suppressed when last coal and produced during poke is because combustion chamber pelvic cavity internal upper part and bottom all are furnished with secondary wind, the institute so that coal can burn fully, whenever and wherever possible can coal supply, be not subjected to any condition restriction, the residual cinder that burnt goes out clearly from Boiler door.For making fire-resistant high temperature resistance in the pelvic cavity, adopt special clay refractory slab, to form by five, the wind of combustion chamber bellows 16 is exactly to keep watch by refractory brick 14, combustion chamber tuyere 15 to be sent in the coal seam of combustion chamber.The high temperature resistance safeguard procedures have also been done at pelvic cavity and refractory slab top, and its material has adopted high-grade refractory material casting to form, and its shape is basin shape, and its outer wall is close on the inner bag of boiler, and is sturdy and durable.

Technique effect

Coal-fired boiler with screw conveyor is combined in one if prove with vertical handwarmer and coal furnace by practice Rise and to solve the unborn deficiency of handwarmer, than transforming front quick heating, economizing on coal, to what burn Coal still can be burnt original coal after originally burning what coal transformation without limits, after transforming than transformation Before can save raw coal 20%, this equipment operating is simple, and is stable, soot emissions and indices All be better than national standard, small investment, instant effect are applicable to that oneself has the users of boiler to reach new The user.

Claims

1. auger type coal furnace, be by body of heater with at the coal-supply system of body of heater bottom, air feed system is formed, coal-supply system is installed in combustor body (1), it is characterized in that: described coal-supply system comprises, in last coal coal bunker (20) below and extend into screw conveyer device in the combustion chamber (26), auger main shaft (22) is contained in the auger cylinder (21), connect through screw-conveyer-shaft flange (23) and the mainshaft gear that is installed on the auger main bearing shell seat (25), main bearing shell seat (25) is installed on watt seat support (7), a motor (4) is installed in equipment bay (5), be connected with reductor (6) through driving belt, reductor (6) output shaft is drive shaft gear (24) and power transmission shaft (3) simultaneously, power transmission shaft (3) connects gearbox (2), gearbox (2) is installed in the lower bottom part of combustion chamber (26), and its output shaft is connected to the agitator (17) that is installed in the burning coal layer; Described air feed system comprises: an air blast (8), the blower fan output connects combustion chamber bottom ajutage (9) and top, combustion chamber secondary air main (10), secondary air main (10) is connected to secondary wind bellows (11), bellows connect a plurality of wind airducts (12) and (19) of its air outlet in the combustion zone respectively, the top of the burner hearth that is built at refractory brick (14) is combustion chamber heat insulating belt (13) and (18), combustion chamber bottom ajutage (9) is connected to combustion chamber bellows (16), a plurality of combustion chamber tuyeres (15) that are distributed in the burner hearth communicate with the combustion chamber bellows, form the air feed system of a secondary blast therefrom.