CN201935383U

CN201935383U - High-efficiency hot blast stove

Info

Publication number: CN201935383U
Application number: CN2011200491151U
Authority: CN
Inventors: 高镇家
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-02-25
Filing date: 2011-02-25
Publication date: 2011-08-17
Anticipated expiration: 2021-02-25

Abstract

The utility model provides a high-efficiency hot blast stove. A heat exchange flue gas tube bundle is communicated between a combustion chamber inside a housing of the stove and a smoke collection chamber to form a flue gas discharge passage for the combustion chamber, a cold air heat exchange space is formed among the combustion chamber, the flue gas tube bundle and the stove housing, the flue gas tube bundle is made of heat-resisting stainless steel tubes, two ends of each tube are respectively connected with a corresponding combustion chamber tube bundle connector and a smoke collection chamber tube bundle connector in an inserted manner, and a cold air inlet portion is right opposite to a connection position of the combustion chamber with the flue gas tube bundle. Heat exchange efficiency of the high-efficiency hot blast stove is improved, operational high temperature of the flue gas tube bundle and the combustion chamber is fully considered in terms of structural design, the hot blast stove cannot be easily overheated and burnt, and the service life of the hot blast stove is prolonged.

Description

High-efficient hot air furnace

Technical field

The utility model relates to the hot-blast stove of air heat energy exchange.

Background technology

Hot-blast stove is that combustion heat energy and cold air exchange, the thermal power transfer stove of output hot blast, comprise in the furnace shell independently combustion chamber, be communicated with the flue gas tube bank with the combustion chamber, combustion product gases is disposed in the atmosphere through fume collecting chamber by the flue gas tube bank, be the heat transfer space of cold air between furnace shell and the combustion chamber, furnace shell is provided with cold wind import and hot-blast outlet.At present, the technical problem underlying that hot-blast stove faces is how to guarantee flue gas tube bank and enough bear combustion high temperature and avoid by scaling loss with the potential energy that is connected of combustion chamber, makes product have suitable service life.In the present product composition, iron pipe is adopted in the flue gas tube bank, caliber only is 1.5 "; and is communicated with the fixing welding in combustion chamber, caliber is little, is easy to adhere to exhaust gas dust and gets clogged; causing the gas fume of combustion chamber circulation not smooth; the pre-allowance that influence is burnt and heat exchange efficiency, particularly fixed connection structure do not have tubing to expand with heat and contract with cold, is the structure position that occurs quality problems easily.In addition in the structure technology design, the specified efficiency of combustion in combustion chamber should can be complementary with the heat exchange air flow property, the tube bank of combustion chamber and flue gas can be worked in the operating temperature range in required stove reliably and with long-term, this also is to make the flue gas tube bank avoid scaling loss, one main technical requirements of hot-blast stove efficient operation, but present hot-blast stove structure structure, its cold wind import only with the combustion chamber working stability as single restrictive condition, and it is not in place for flue gas tube bank job requirement design, the flue gas tube bank does not obtain required heat exchange cold wind, is to cause overheated scaling loss yet, the technical factor that the thermal efficiency is not high.

Summary of the invention

Goal of the invention of the present utility model is to provide a kind of high-efficient hot air furnace that hot blast heat exchange delivery efficiency, internals are difficult for scaling loss that improves.The high-efficient hot air furnace technical scheme that the utility model provides, its major technique content is: a kind of high-efficient hot air furnace, be provided with the combustion chamber in the furnace shell, the tube bank of heat exchange flue gas is communicated between combustion chamber and the fume collecting chamber, constitute the fume emission passage of combustion chamber, the combustion chamber, form the cold air heat transfer space between flue gas tube bank and the furnace shell, hot-blast outlet is arranged on the furnace shell near fume collecting chamber, the cold wind import is arranged on the furnace shell of combustion chamber side, it is characterized in that flue gas tube bank made by the heat-resistance stainless steel pipe, the pipe two ends are restrained the connector plug-in mounting with combustion chamber tube bank connector with fume collecting chamber respectively and are connected, and the top of cold wind import is right against the connecting portion of combustion chamber and flue gas tube bank.

The high-efficient hot air furnace technical scheme that the utility model provides, the flue gas tube bank is connected with the combustion chamber with plug-in mounting structure, for expanding with heat and contract with cold of its tubing provides pre-allowance, and the cold wind import both had been positioned at the position, combustion chamber, also be in the also very high combustion chamber of operating temperature and be connected the position with the flue gas tube bank, except that the cold wind that provides required of working for the combustion chamber, the direct percolation of part cold wind is in the combustion chamber connecting portion of flue gas tube bank, the cold wind of existing a great deal of and high temperature combustors and flue gas tube bank direct heat transfer, improve heat exchange efficiency, and this part cold wind can also make the temperature of flue gas tube bank connecting portion maintain substantially in the scope of technology permission, make it not by the high temperature scaling loss, prolong the service life of hot-blast stove.

Description of drawings

Fig. 1 is the broken section structure chart of this high-efficient hot air furnace

Fig. 2 be Fig. 1 A to topology view.

The specific embodiment

The disclosed high-efficient hot air furnace of the utility model, structure as shown in drawings, combustion chamber 2 is arranged in the furnace shell 1, also be provided with the fire door 9 that feeds combustion chamber 2 on the furnace shell 1,2 bottoms, combustion chamber are grit chamber 8, and its skimming door also is the return air door simultaneously, and some fume pipes are formed flue gases tube bank 3 and are communicated with combustion chamber 2, flue gas is restrained 3 other ends and is fed fume collecting chamber 4, has constituted cold air heat transfer space 5 between combustion chamber 2 and flue gas tube bank 3 and the furnace shell 1.Described flue gas tube bank 3 is made by heat-resisting, acidproof, alkaline-resisting stainless steel pipe, as to select caliber for use be that Φ 114, model are that tubing such as 201,301,304 are made, its caliber is big, the combustion product gases circulation can be improved, and be difficult for stopping up because of adhering to dust, flue gas tube bank 3 is communicated with the tube bank connector 10 of combustion chamber and tube bank connector 11 plug-in mountings of fume collecting chamber in the plug-in mounting mode, in the fume emission atmosphere, has constituted the discharge-channel of combustion product gases the most at last.The plug-in mounting structure of flue gas tube bank 3 provides pre-allowance for tubing expands with heat and contract with cold, the material of having avoided fixing Welding Structure to occur is torn technical problem.The furnace shell that is right against combustion chamber 2 is provided with the cool air hose 6 as the cold wind import, approaches fume collecting chamber hot-blast outlet 7 is set.As shown in drawings, the cool air hose 6 of furnace shell is over against the both sides, combustion chamber, and its top edge is higher than top of combustion chamber, makes the top of cold wind import be right against the combustion chamber connecting portion of flue gas tube bank.According to combustion intensity control cold wind air quantity, make combustion chamber 2 and with the temperature that is connected the position of flue gas tube bank 3 can be stable maintain in the required working range, avoid being increased the service life by the high temperature scaling loss.

Claims

1. high-efficient hot air furnace, be provided with combustion chamber (2) in the furnace shell, heat exchange flue gas tube bank (3) is communicated between combustion chamber and the fume collecting chamber, constitute the fume emission passage of combustion chamber, the combustion chamber, form cold air heat transfer space (5) between flue gas tube bank and the furnace shell, hot-blast outlet is arranged on the furnace shell near fume collecting chamber, the cold wind import is arranged on the furnace shell of combustion chamber side, it is characterized in that flue gas tube bank made by the heat-resistance stainless steel pipe, the pipe two ends are restrained connector (11) plug-in mounting with combustion chamber tube bank connector (10) with fume collecting chamber respectively and are connected, and the top of cold wind import is right against the connecting portion of combustion chamber and flue gas tube bank.