CN2295963Y

CN2295963Y - Horizontal coal hot air furnace

Info

Publication number: CN2295963Y
Application number: CN 97216254
Authority: CN
Inventors: 李振禄; 韩冬
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-06-02
Filing date: 1997-06-02
Publication date: 1998-10-28
Anticipated expiration: 2007-06-02

Abstract

The utility model relates to a horizontal coal burning hot air furnace, characterized in that a preheating air channel for preheating cold air and reducing the temperature of a burning chamber is arranged in the wall of the burning chamber which can be used for carrying out the heating surface of the cold air. A heat exchanging pipe arranged in a heat exchanging chamber is a U type heat exchanging pipe, one port of the U type heat exchanging pipe and a preheating air channel arranged in the wall of the burning chamber are mutually connected, and the bottom end of the U type heat exchanging pipe is hanging. The utility model can avoid the defects that because of the splitting of a welding seam between the top end of the heat exchanging pipe and a pipe plate which is caused by a temperature stress and the mixture of fume and clean high-temperature hot air, dry material is caused to be polluted and the burning chamber is easily damaged.

Description

Horizontal coal-fired hot-blast stove

The utility model relates to generally the fluid heater of heat-generating device technical field, particularly a kind of horizontal coal-fired hot-blast stove that is used for dry industry.

In the grain heat-drying production process, needed drying medium is exactly clean high-temperature hot air, the equipment that produces hot-air is hot-blast stove, present employed hot-blast stove is the straight tubular heat exchanger structure, the two ends of heat exchanger tube respectively with heat-exchanging chamber in tube sheet be fixed together, therefore dust will be deposited in the interior low-temperature space of heat exchanger in the course of the work, cause obstruction of heat exchanger low-temperature space and high-temperature region by scaling loss, influence the heat exchange of heated air and cold air, in addition because the heating temperature of heat exchanger tube is different, its swell increment is sample not also, will produce very big thermal (temperature difference) stress, cause the weld seam between heat exchanger and the tube sheet to break away from, flue gas mixes with the high-temperature hot air of cleaning, cause dried material contaminated, also exist the combustion chamber because of high temperature easily by the shortcoming of scaling loss.

The purpose of this utility model provides and a kind ofly can guarantee continuous operation, the heat exchanger effectiveness height, and long service life, and can prevent that flue gas from entering the horizontal coal-fired hot-blast stove in the heat exchanger.

The utility model is to realize like this, it comprises fire grate, feeding-coal bucket, chamber wall, the combustion chamber, hot-air mouth, cold wind mouth, exhaust opening, blast cap, ash-falling chamber, shoot door, ash gate, fireguard and heat exchanger tube is characterized in that and can be provided with the preheated air passage that is used for the preheating cold air and reduces chamber temperature in the wall as the combustion chamber of carrying out preheating cold air heating surface that the heat exchanger tube that is arranged in the heat-exchanging chamber is a U type heat exchanger tube, the port preheated air passage interior with being arranged on chamber wall of U type heat exchanger tube is connected, and the bottom of U type heat exchanger tube is unsettled.

The utility model is owing to be provided with the heat exchanger of being made up of U type heat exchanger tube in heat-exchanging chamber, in chamber wall, be provided with the passage that is used to reduce chamber temperature and is used for the preheating cold air, so can prevent since between heat exchanger tube top that thermal (temperature difference) stress caused and the tube sheet taking off of weld seam split, flue gas mixes with the high-temperature hot air of cleaning, causes the contaminated and easy impaired shortcoming in combustion chamber of dried material.

Below in conjunction with accompanying drawing the utility model is further described,

Fig. 1 is the structural representation of horizontal coal-fired hot-blast stove,

The structural representation of the heat exchanger that Fig. 2 is made up of the U type heat exchanger,

Fig. 3 be the combustion chamber along A--A to cut-away view,

Fig. 4 be heat-exchanging chamber along B--B to cut-away view,

As Fig. 1--shown in 4, this horizontal coal-fired hot blast comprises fire grate 1, feeding-coal bucket 2, chamber wall 3, combustion chamber 5, hot-air mouth 7, cold wind mouth 4, exhaust opening 10, blast cap 8, ash-falling chamber 11, shoot door 12--13, ash gate 14, fireguard 6 and heat exchanger tube 9 are provided with the preheated air passage 15 that is used for the preheating cold air and reduces chamber temperature in can be as the chamber wall 3 that carries out preheating cold air heating surface, the heat exchanger tubes 9 that are arranged in the heat-exchanging chamber 16 are U type heat exchanger tube, port of U type heat exchanger tube is connected with preheated air passage 15 in being arranged on chamber wall 3, the bottom of U type heat exchanger tube is unsettled, during use, coal-fired enter combustion chamber 5 internal combustion through feeding-coal bucket 2, the flue gas that is produced in fireguard 6 enters heat-exchanging chamber 16 and with the cold air generation heat exchange that enters by cold wind mouth 4 and preheating cold air channel 15 in the U type heat exchanger tube 9, the flue dust that is produced in the heat-exchanging chamber 8 directly drops in the dust fall chamber 11, discharges by dust-cleaning door 12 then.

Claims

1, a kind of horizontal coal-fired hot-blast stove, it comprises fire grate, feeding-coal bucket, chamber wall, combustion chamber, hot-air mouth, the cold wind mouth, exhaust opening, blast cap, ash-falling chamber, shoot door, ash gate, fireguard and heat exchanger tube, it is characterized in that and to be provided with the preheated air passage that is used for the preheating cold air and reduces chamber temperature in the wall as the combustion chamber of carrying out preheating cold air heating surface, the heat exchanger tube that is arranged in the heat-exchanging chamber is a U type heat exchanger tube, and the port preheated air passage interior with being arranged on chamber wall of U type heat exchanger tube is connected, and the bottom of U type heat exchanger tube is unsettled.