CN2301670Y

CN2301670Y - Vertical cast iron grate back burning boiler

Info

Publication number: CN2301670Y
Application number: CN 97224494
Authority: CN
Inventors: 王晓利; 邓静秋
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-08-22
Filing date: 1997-08-22
Publication date: 1998-12-23
Anticipated expiration: 2007-08-22

Abstract

The utility model relates to a back burning boiler with a cast iron fire grate. The utility model uses a cast iron fire grate with high temperature resistance to replace the water overflow pipe type fire grate, saves one fire grate, shortens the gap of the fire grate, increases the draught area, and improves the heat strength of the fire grate.

Description

A kind of vertical casting furnace grate back firing boiler

The utility model belongs to the boiler technology field, particularly the casting furnace grate back firing boiler.

Great majority are forward combustion in general hand-fired boiler, and the required air that promptly burns passes fire grate from bottom to top earlier, pass the coal seam again and arrive the top flame zone.The new coal that adds is directly to drop in the flame of upper strata, thereby boiler produces and comes the after-flame carbon granules to produce a large amount of black smokes in a large number during coal.Reverse burning is that the required air of burning passes the coal seam from top to bottom earlier, passes fire grate again and arrives the combustion flame district.The new coal that adds is to put on the also unburned coal seam, upper strata, and boiler does not produce black smoke during coal.Because fire grate is in red-hot flame during reverse burning, so the heat-resisting quantity of fire grate is required all to adopt water cooling tube to make fire grate at present than higher.This fire grate is made complexity, and grate burning rate is not enough, and easy knot trowel used for plastering generation booster also is easy to generate vapour lock in the pipe, influences flowing of the interior water of fire grate, burns out fire grate.Because fire grate is thicker, the slit between the fire grate that makes is less on the one hand, has reduced draught area and has caused grate burning rate low in addition, and the day-coal incomplete combustion falls on the other hand, need increase one deck lower fire grating again.

The purpose of this utility model is the shortcoming that overcomes existing back firing boiler, and a kind of casting furnace grate is provided, and simplifies the structure of existing back firing boiler, and it is low to solve existing double-layer inverse burning grate burning rate, and boiler output is not enough, the problem that smoke effect is not high.

The technical solution of the utility model is achieved in that because casting furnace grate is thinner, the slit of fire grate is moderate, has increased draught area, has improved the ripe intensity of fire grate by replacing the water cooling tube fire grate with high temperature resistant casting furnace grate; Coal is more complete in the upper strata ratio of combustion simultaneously, can economize the sub-cloud fire grate.

The utility model is given full play to the advantage of reverse burning boiler, has solved the problem of boiler over-emitting black exhaust, and combustible species is fully burnt.Cylinder iron fire grate replaces the water cooling tube fire grate, and boiler has saved one deck fire grate, has simplified boiler structure, has reduced product cost.

Below in conjunction with drawings and Examples the utility model is further described.

Accompanying drawing 1 is the utility model structural representation.

With reference to accompanying drawing, on boiler body 2 tops is chimney 1, there are coal feeding hole 3 and observation panel 4 in the middle part, the bottom is for drawing cinder notch 5, observation panel 4 is drawn the top of cinder notch 5 in the bottom of coal feeding hole 3, boiler internal has inwall 7 and horizontal water tube 8, it between inwall 7 and the boiler jacket water jacket 6, horizontal water tube 8 and water jacket 6 UNICOMs, the top of fire grate 11 is burner hearth 10, on the fire grate 11 lower inside walls flame retardant coating 12 and exhanst gas outlet 13 is arranged, and exhanst gas outlet 13 is communicated with exhaust gases passes 9, exhaust gases passes 9 one ends and chimney 1 UNICOM, the other end and cleaning door 14 UNICOMs.The new coal that drops into is at fire grate 11, and air passes the coal seam from top to bottom, and flame burns downwards.High-temperature flue gas enters exhaust gases passes 9 through both sides, fire grate 11 bottom outlet flue 13, enters upper boiler by exhaust gases passes 9.The heat of high-temperature flue gas absorbs the water in the heating water jacket 6 by boiler inner wall 7 and horizontal water tube 8.In the process that flue gas rises,, regularly draw out by cleaning door 14 because the effect of inertia and gravity is got off most of dirt particles settling.

Claims

1. vertical casting furnace grate back firing boiler, it is characterized in that: boiler body (2) top is chimney (1), there are coal feeding hole (3) and observation panel (4) in the middle part, the bottom is for drawing cinder notch (5), observation panel (4) is drawn the top of cinder notch (5) in the bottom of coal feeding hole (3), boiler internal has inwall (7) and horizontal water tube (8), between inwall (7) and the boiler jacket water jacket (6), horizontal water tube (8) and water jacket (6) UNICOM, the top of fire grate (11) is burner hearth (10), flame retardant coating (12) and exhanst gas outlet (13) are arranged on the madial wall of fire grate (11) bottom, exhanst gas outlet (13) and exhaust gases passes (9) UNICOM, exhaust gases passes (9) one ends and chimney (1) UNICOM, the other end and cleaning door (14) UNICOM.

2. casting furnace grate back firing boiler according to claim 1 is characterized in that described fire grate (11) is a casting furnace grate.