Spiral heating type hot blast stove

Abstract

The utility model discloses a spiral heating type hot blast stove which comprises a smoke preheating chamber and a combustion heating chamber which are separated through a heat insulation plate. A vortex-shaped spiral smoke pipe is arranged in the smoke preheating chamber, a columnar combustion chamber is upwards arranged at the bottom of the combustion heating chamber, the spring-shaped spiral heating pipe is wound on the side wall of the columnar combustion chamber, and the vortex-shaped spiral heating pipe is arranged at the top of the columnar combustion chamber. The inlet end of the spring-shaped spiral heating pipe is located at the bottom and connected with the cold air outlet through the air inlet pipe, the outlet end of the spring-shaped spiral heating pipe is connected with the inlet end of the outer side of the vortex-shaped spiral heating pipe, and the outlet end of the vortex-shaped spiral heating pipe is located in the center of the vortex-shaped spiral heating pipe. The utility model has the characteristics of high heat efficiency, low energy consumption, high air temperature and long service life.

Description

Technical Field

[0001] The utility model relates to the technical field of hot blast stoves, and specifically relates to a spiral heating type hot blast stove. Background Art

[0002] A hot blast stove is a stove that heats the introduced gas through the furnace body. Generally, an air-assisted blower is arranged on one side of the hot blast stove. When the hot blast stove is powered on or burning, the air sent by the blower is heated in the furnace, and then under the action of the blower discharging into the pressurized gas, the hot air obtained by heating is discharged outwards.

[0003] The existing problems of the hot blast stove are low thermal efficiency, high energy consumption, short service life and other deficiencies.

[0004] The information disclosed in the above background art section is only for increasing the understanding of the overall background of the present utility model, and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0005] Aiming at the above existing defects, the purpose of the present utility model is to provide a spiral heating type hot blast stove, which has the characteristics of high thermal efficiency, low energy consumption, high air temperature and long service life.

[0006] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0007] A spiral heating type hot blast stove includes a flue gas preheating chamber and a combustion heating chamber, and the flue gas preheating chamber and the combustion heating chamber are separated by a heat insulation board; a vortex-shaped spiral flue gas pipe is arranged in the flue gas preheating chamber, the inlet of the spiral flue gas pipe is located outside the spiral flue gas pipe, the outlet of the spiral flue gas pipe is located at the center of the spiral flue gas pipe, the inlet of the spiral flue gas pipe passes through the heat insulation board downward and communicates with the combustion heating chamber, and the outlet of the spiral flue gas pipe communicates with the outside of the flue gas preheating chamber upward; in the upper part of the flue gas preheating chamber, a cold air inlet is also arranged beside the outlet of the spiral flue gas pipe; in the lower part of the flue gas preheating chamber, a cold air outlet is arranged beside the inlet of the spiral flue gas pipe; a columnar combustion chamber is arranged upward at the bottom of the combustion heating chamber, and further includes a spring-shaped spiral heating pipe wound around the side wall of the columnar combustion chamber, and a vortex-shaped spiral heating pipe arranged at the top of the columnar combustion chamber. The inlet end of the spring-shaped spiral heating pipe is located at the bottom and is connected to the cold air outlet through an air inlet pipe, the outlet end of the spring-shaped spiral heating pipe is connected to the outer inlet end of the vortex-shaped spiral heating pipe, the outlet end of the vortex-shaped spiral heating pipe is located at the center of the vortex-shaped spiral heating pipe, and communicates with the outside of the columnar combustion chamber through an air outlet pipe.

[0008] Further, the spiral flue gas pipe is an aluminum pipe.

[0009] Further, heat dissipation fins are arranged beside the spiral flue gas pipe.

[0010] Furthermore, the spiral heating pipe is an aluminum / stainless steel composite pipe.

[0011] Furthermore, the intake pipe and the exhaust pipe are aluminum / stainless steel composite pipes

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The high-efficiency and energy-saving hot blast stove of the utility model has the characteristics of high thermal efficiency, low energy consumption, high air temperature and long service life. The aluminum / stainless steel composite pipe combines the advantages of heat-resistant stainless steel with high temperature resistance, oxidation resistance, long service life, high strength and high thermal conductivity coefficient of aluminum. As the heat exchanger material of the hot blast stove, it can realize flame contact heating and greatly improve the heat exchange efficiency of the heat exchanger of the hot blast stove. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of a spiral heating type hot blast stove according to the utility model;

[0015] Figure 2 It is a structural diagram of the spiral flue gas pipe according to the utility model;

[0016] Figure 3 It is a structural diagram of the spiral heating pipe according to the utility model;

[0017] In the figure, 1 - flue gas preheating chamber; 2 - combustion heating chamber; 3 - heat insulation board; 11 - spiral flue gas pipe; 112 - spiral flue gas pipe inlet; 111 - spiral flue gas pipe outlet; 12 - cold air inlet; 13 flue gas outlet; 31 - cold air outlet; 25 - columnar combustion chamber; 21 - spring-shaped spiral heating pipe; 22 - vortex-shaped spiral heating pipe; 24 - intake pipe; 222 - vortex-shaped spiral heating pipe inlet end; 221 - vortex-shaped spiral heating pipe outlet end; 23 - exhaust pipe; 32 - flue gas inlet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to describe in detail the technical content, the achieved purpose and the effects of the utility model, the following is described in conjunction with the embodiments and with reference to the accompanying drawings. In the description of this embodiment, it should be understood that the terms indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this embodiment and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the utility model.

[0019] As Figures 1-3 shown,

[0020] A spiral heating hot blast stove, comprising a flue gas preheating chamber 1 and a combustion heating chamber 2, which are separated by a heat insulation plate 3;

[0021] In the flue gas preheating chamber 1, a vortex-shaped spiral flue gas pipe 11 is provided. The inlet of the spiral flue gas pipe 11 is located on the outside of the spiral flue gas pipe 11, and the outlet of the spiral flue gas pipe 11 is located at the center of the spiral flue gas pipe 11. The inlet of the spiral flue gas pipe 11 passes downward through the heat insulation plate 3 to communicate with the combustion heating chamber 2. The outlet of the spiral flue gas pipe 11, that is, the spiral flue gas pipe outlet 111, communicates upward with the outside of the flue gas preheating chamber 1. In the upper part of the flue gas preheating chamber 1, an air inlet 12 is also provided beside the flue gas outlet 13 of the spiral flue gas pipe 11. In the lower part of the flue gas preheating chamber 1, the spiral flue gas pipe inlet 112 communicates with the flue gas inlet 32, and an air outlet 31 is provided beside the flue gas inlet 32 of the spiral flue gas pipe 11;

[0022] In the combustion heating chamber 2, a columnar combustion chamber 25 is arranged upward from the bottom. It also includes a spring-shaped spiral heating pipe 21 wound around the side wall of the columnar combustion chamber 25 and a vortex-shaped spiral heating pipe 22 arranged at the top of the columnar combustion chamber 25. The inlet end of the spring-shaped spiral heating pipe 21 is located at the bottom and is connected to the air outlet 31 through an air inlet pipe 24. The outlet end of the spring-shaped spiral heating pipe 21 is connected to the inlet end 222 of the vortex-shaped spiral heating pipe located outside the vortex-shaped spiral heating pipe 22. The outlet end 221 of the vortex-shaped spiral heating pipe is located at the center of the vortex-shaped spiral heating pipe 22 and communicates with the outside of the columnar combustion chamber 2 through an air outlet pipe 23.

[0023] In this embodiment, the furnace body specifically includes two parts: the upper part is the flue gas preheating chamber 1, and the lower part is the combustion heating chamber 2. The two parts are separated by a heat insulation plate 3.

[0024] The vortex-shaped spiral flue gas pipe 11 in the flue gas preheating chamber 1 is used to circulate the hot flue gas generated during fuel combustion. The spiral flue gas pipe 11 is located in the flue gas preheating chamber 1. Except for the part of the spiral flue gas pipe 11, it is a cavity. Fins can be arranged on the spiral flue gas pipe 11 to further accelerate heat dissipation. The flue gas is introduced into the spiral flue gas pipe 11, and the cold air in the flue gas chamber 1 is heated through heat dissipation. The flue gas passing through the spiral flue gas pipe 11 is equivalent to cooling down, and finally is discharged from the furnace body of the hot blast stove.

[0025] In the combustion heating chamber 2, there are two forms of aluminum / stainless steel composite pipes (supporting flame contact heating, hereinafter simply referred to as "composite pipes"): namely, a spiral composite pipe structure in the shape of a spring and a spiral composite pipe structure in the shape of a vortex, that is, a spring-shaped spiral heating pipe and a vortex-shaped spiral heating pipe. Among them, the outlet end of the spiral composite pipe structure in the shape of a spring communicates with the inlet end of the spiral composite pipe structure in the shape of a vortex. Combined to form as Figure 1The structure shown has a columnar combustion chamber in the middle. Fuel burns in the combustion chamber. The side flame of the fire heats the spring-shaped spiral heating tube, and the top flame of the fire heats the top vortex-shaped spiral heating tube. When the hot flue gas generated by combustion rises, it enters the flue gas pipe.

[0026] The overall heating process is as follows: Cold air enters the cavity of the flue gas chamber through a blower, undergoes preliminary heating through heat exchange with the flue gas pipe, and then enters the bottom of the spring-shaped spiral composite pipe structure through a pipeline. The air spirally rises along the pipeline and is heated by the side flame of the fire. After entering the vortex-shaped spiral composite pipe structure, the air spirally flows from the outside to the inside and makes full use of the fire for flame contact heating until it reaches the highest temperature and then is sent out of the hot blast stove through the outlet pipe.

[0027] Technical principle: The aluminum / stainless steel composite pipe combines the advantages of heat-resistant stainless steel, such as high temperature resistance, oxidation resistance, long service life, high strength, and the high thermal conductivity coefficient of aluminum. As the heat exchanger material of the hot blast stove, it can achieve flame contact heating and greatly improve the heat exchange efficiency of the heat exchanger of the hot blast stove. Based on the new type of heat exchange composite pipe material, we have designed the high-efficiency and energy-saving hot blast stove with a compact and simple structure of the present utility model - the flame contact-spiral structure hot blast stove. After the cold air enters the flue gas chamber, it undergoes heat exchange with the finned flue gas pipe (aluminum pipe) to preliminarily heat the cold air. After that, the cold air enters the combustion chamber through a pipeline for flame contact heating. The whole process makes full use of the heat of the fire and the remaining heat of the hot flue gas generated by combustion, greatly improving the thermal efficiency of the hot blast stove.

[0028] Heating effect: The hot blast stove of the present utility model has the characteristics of high thermal efficiency, low energy consumption, high air temperature, and long service life. The actual thermal efficiency is as high as 90%, which is 30% higher than the average thermal efficiency of the existing hot blast stoves on the market. Calculated according to 360 days of operation per year and a two-shift work system, each hot blast stove can save 550 tons (standard coal) / year, and can save up to 310,000 yuan / year at most (the coal price is 370 yuan / ton - 570 yuan / ton), and the cost-saving effect is remarkable. The hot blast stove of the present utility model can be used for heating and drying in the fields of agricultural products, food processing, pharmaceuticals, heating, building materials, metallurgy, etc., such as wheat drying, biscuit drying, Chinese herbal medicine drying, wood drying, powder curing of automobile shells, etc., and has a very broad market application prospect.

[0029] Although the present utility model has been described in detail with specific implementation manners in the above text, based on the present utility model, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present utility model all fall within the scope protected by the present utility model.

Claims

1. A spiral heating hot blast stove, characterized in that: It includes a flue gas preheating chamber and a combustion heating chamber, which are separated by a heat insulation board between the flue gas preheating chamber and the combustion heating chamber; A spiral flue gas pipe in a vortex shape is arranged in the flue gas preheating chamber. The inlet of the spiral flue gas pipe is located on the outside of the spiral flue gas pipe, and the outlet of the spiral flue gas pipe is located at the center of the spiral flue gas pipe. The inlet of the spiral flue gas pipe passes downward through the heat insulation board to communicate with the combustion heating chamber, and the outlet of the spiral flue gas pipe communicates upward with the outside of the flue gas preheating chamber; in the upper part of the flue gas preheating chamber, a cold air inlet is also arranged beside the outlet of the spiral flue gas pipe; in the lower part of the flue gas preheating chamber, a cold air outlet is arranged beside the inlet of the spiral flue gas pipe; A columnar combustion chamber is arranged upward at the bottom of the combustion heating chamber. It also includes a spring-shaped spiral heating pipe wound around the side wall of the columnar combustion chamber and a spiral heating pipe in a vortex shape arranged at the top of the columnar combustion chamber. The inlet end of the spring-shaped spiral heating pipe is located at the bottom and is connected to the cold air outlet through an air inlet pipe. The outlet end of the spring-shaped spiral heating pipe is connected to the outside inlet end located on the outside of the spiral heating pipe in a vortex shape. The outlet end of the spiral heating pipe in a vortex shape is located at the center of the spiral heating pipe in a vortex shape and communicates with the outside of the columnar combustion chamber through an air outlet pipe.

2. The hot blast stove with spiral heating according to claim 1, wherein: The spiral flue gas pipe is an aluminum pipe.

3. The hot blast stove with spiral heating according to claim 1, characterized in that: Radiating fins are arranged beside the spiral flue gas pipe.

4. The hot blast stove with spiral heating according to claim 1, characterized in that: The spiral heating pipe is an aluminum / stainless steel composite pipe.

5. The hot blast stove with spiral heating according to claim 1, characterized in that: The air inlet pipe and the air outlet pipe are aluminum / stainless steel composite pipes.

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