Biomass energy hot blast stove

Abstract

The invention discloses a hot blast stove for drying grains by using the combustion of biomass energy. The hot blast stove comprises a stove cavity and a heat exchanger, wherein the heat exchanger is welded on a heat exchanging plate through both ends of a heat exchanging pipe; and the stove cavity is vertically arranged and is connected with the heat exchanging plate through arc parts. In the fuel selection of the biomass energy hot blast stove, the conventional coal oil and diesel are replaced, various nearly-rejected materials such as waste wood, coal, rice hulls, straws and the like are used as fuels, and the drying cost of the grains is reduced by approximately 60 percent compared with that of the conventional (fuel oil) cyclic grain dryer. In addition, the hot blast stove supplies stable heat sources by using a multiple interlock control design, so that the drying quality of the grains is improved. A combustion chamber and a high temperature hot air channel are made of special refractories, so that the service life of the hot blast stove is prolonged, and the using safety of the hot blast stove is ensured. Certainly, the hot blast stove meets the requirements on social progress of energy conservation and environment friendliness due to the arrangement of a cyclone dust remover and an air filter screen.

Description

Technical field: [0001] The invention relates to a hot blast stove, in particular to a hot blast stove which utilizes biomass energy combustion to realize grain drying. Background technique: [0002] For grain drying equipment, some similar hot blast stoves currently on the market have certain defects. [0003] Such as Figure 1a and Figure 1b As shown, this is a kind of existing hot blast stove. Its combustion chamber has a square structure at the bottom or an arc-shaped upper part of the combustion chamber. The hot air generated by combustion enters the heat exchange tube, the exhaust gas is discharged from the top, and the exchanged hot air is introduced into the air duct. Corresponding grain dryer. [0004] Such as Figure 2a and Figure 2b As shown, this is another existing hot blast stove. The difference from Fig. 1 is that the heat exchanger pipes are arranged horizontally, and the hot air after combustion enters the heat exchanger from the end corresponding to t...

AI Technical Summary

Problems solved by technology

[0006] (1) The tubular heat exchanger and the combustion chamber lie horizontally. The disadvantage is that the heat exchange tube is easily blocked, which affects the heat exchange efficiency, wastes fuel, and often reduces the heat exchange area due to the blockage of the heat exchange tube, resulting in failure to meet the requirements. The expected hot air temperature

The combustion chamber is horizontal, the combustion chamber is narrow and long, and the height of the combustion chamber generally does not exceed 1000mm, which reduces the effective combustion volume of the combustion chamber with limited combustion space, which will cause the fuel to be ineffectively burned (especially rice husk, wood, straw, etc.), and waste energy.

[0007] (2) There is no combustion-supporting air supply device in the combustion chamber, resulting in incomplete combustion of some fuels

[0008] (3) The heat exchanger is not cleaned thoroughly

[0009] (4) There is no refractory material in the high temperature area or general refractory material is used, which is easy to deform and has a short service life

[0010] (5) Part of the design adopts the method of directly heating the exchange tube. The heat exchange tube of general material is directly heated by an open flame, which is easy to deform and burst, and it is impossible to avoid the open flame directly entering the grain dryer, causing a fire.

[0011] (6) Control: simple function, no alarm device

[0012] (7) Fuel delivery: The structure is simple, and the quantity and energy cannot be perfectly combined, resulting in excessive fluctuations in the actual temperature difference. During the grain drying process, the temperature of the hot air fluctuates too much, which affects the grain drying quality.

Images