A tobacco stem combustion fluidized bed boiler

Abstract

The utility model discloses a tobacco stem combustion fluidized bed boiler, including with the furnace body of combustion chamber and install the pot shell at the top of furnace body, the one side of furnace body has tobacco stem feed pipe and fuel pipe in proper order from top to bottom, the inside of this furnace body is transversely placed and has the receiving tray, and the inside of furnace body is located the vertical wind pipe of receiving tray top position, the outer wall of wind pipe is provided with the high temperature resistant splicing support for the tobacco stem overhead, and the pipe body of wind pipe is located in the combustion chamber part and is inclined to open from below to above and has a plurality of groups of air outlet holes, the utility model discloses a high temperature resistant splicing support, can carry out overhead to tobacco stem bottom, and utilize the vertical wind pipe and air outlet hole cooperation, directly deliver air from below to above to the furnace body and carry out sufficient contact with tobacco stem, make tobacco stem combustion more sufficient, accelerate the combustion speed of tobacco stem, save fuel and can reduce atmospheric pollution.

Description

Technical Field

[0001] This utility model relates to the field of boilers, specifically a flue gas combustion fluidized bed boiler. Background Technology

[0002] Tobacco stems are waste products generated during the re-drying process of tobacco leaves. Tobacco stems are usually burned in biomass boilers, which are chain grate combustion systems. One type of tobacco stem fluidized bed boiler, with market announcement number CN204100229U, includes a furnace body, a cyclone separator, and a flue pipe. The furnace body consists of a main combustion chamber and a secondary combustion chamber. The grate is composed of several air caps fixed to the bottom of the two combustion chambers. The furnace body has a main combustion chamber with fuel pipes and tobacco stem feed pipes fixed to the wall. The air inlet pipe extends downwards into the main combustion chamber.

[0003] However, in the aforementioned flue-bed boiler, the flue-bed boiler directly feeds the flue-bed into the main combustion chamber through the flue-bed feed pipe, and the flue-bed is directly piled up in the main combustion chamber. Then, the combustion aid is added through the fuel pipe to achieve combustion of the flue-bed. Since the flue-bed is piled up, it takes a longer time to burn. In addition, the air introduced by the inclined air inlet pipe is limited, and the piled-up flue-bed is difficult to fully contact with the air, resulting in incomplete combustion of the flue-bed. Therefore, a flue-bed combustion fluidized bed boiler is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a flue gas combustion fluidized bed boiler to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A flue gas combustion fluidized bed boiler includes a furnace body with a combustion chamber and a boiler drum installed on the top of the furnace body. A flue gas feed pipe and a fuel pipe are distributed sequentially from top to bottom on one side of the furnace body. A receiving tray is placed horizontally inside the furnace body, and an air duct is erected above the receiving tray inside the furnace body. The air duct is used to introduce air into the combustion chamber. The outer wall of the air duct is provided with a high-temperature resistant splicing support for suspending the flue gas. The part of the air duct located in the combustion chamber has several sets of air outlets diagonally opened from bottom to top. The overall cross-sectional shape of each set of air outlets is trapezoidal. The high-temperature resistant splicing support is located on the receiving plate. The high-temperature resistant splicing support consists of a collar sleeved on the outer wall of the air duct and several sets of support plates distributed in a ring on the collar. The top of the collar is provided with a mounting groove for the end of the support plate to be inserted.

[0006] Furthermore, the inclination of the air outlet cavity is 0-70 degrees, and the width of the air outlet cavity near the inside of the duct exceeds the width of the air outlet cavity near the outer wall of the duct.

[0007] Furthermore, the outer side of the support plate is provided with struts at intervals, and the cross-sectional shape of the support plate is an inverted "L" shape.

[0008] Furthermore, the upper surface of the receiving tray is provided with a through hole, and the inner sidewall of the furnace body is provided with support blocks for supporting the receiving tray at intervals.

[0009] Furthermore, one end of the air duct extends out of the furnace body, and the other end of the air duct extends out of the position above the receiving tray and is equipped with a cover, and the cross-sectional shape of the cover is "T" shaped.

[0010] Furthermore, the cross-sectional shape of the duct is "L" shaped, and the top of the vertical section of the duct is provided with an opening.

[0011] The beneficial effects of this utility model are: This invention uses a high-temperature resistant splicing support frame to suspend the bottom of the tobacco stems. By using vertical air ducts and air outlets, air is directly delivered from bottom to top into the furnace body to fully contact the tobacco stems, providing sufficient oxygen and enabling more complete combustion. This accelerates the combustion speed, saves fuel, and reduces air pollution, which is conducive to the widespread use of this tobacco stem combustion fluidized bed boiler. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the flue gas combustion fluidized bed boiler of this utility model; Figure 2 This is a cross-sectional view of the structure of the furnace body and air duct of this utility model in their combined state; Figure 3 This is a schematic diagram of the combined structure of the air duct, high-temperature resistant splicing support frame, and receiving tray of this utility model; Figure 4 This is a top view of the high-temperature resistant splicing support frame of this utility model in an assembled state; Figure 5 This is a top view of the high-temperature resistant splicing support frame of this utility model in another assembled state.

[0013] In the diagram: 1. Furnace body; 2. Boiler drum; 3. Smoke feed pipe; 4. Fuel pipe; 5. Air duct; 501. Air outlet; 502. Cover; 6. Support block; 7. Receiving tray; 701. Through hole; 8. High-temperature resistant splicing support frame; 801. Collar; 802. Installation groove; 803. Support plate; 804. Support rod. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-5 This invention provides a technical solution for a flue gas ash combustion fluidized bed boiler, comprising a furnace body 1 with a combustion chamber and a boiler drum 2 installed on top of the furnace body 1. A flue gas ash feed pipe 3 and a fuel pipe 4 are sequentially distributed from top to bottom on one side of the furnace body 1. A receiving tray 7 is horizontally placed inside the furnace body 1, and an air duct 5 is vertically positioned above the receiving tray 7 inside the furnace body 1. A through hole 701 is formed on the upper surface of the receiving tray 7, through which flue gas ash accumulates at the bottom of the combustion chamber after combustion. The inner wall of component 1 is fitted with spaced support blocks 6 for supporting the receiving tray 7. The support blocks 6 have a rectangular shape when viewed from above. The air duct 5 is used to introduce air into the combustion chamber. The outer wall of the air duct 5 is provided with a high-temperature resistant splicing support frame 8 for suspending the tobacco stem. The part of the air duct 5 located in the combustion chamber has several sets of air outlets 501 diagonally opened from bottom to top. The overall cross-sectional shape of each set of air outlets 501 is trapezoidal. The side view of the air outlets 501 is rectangular or circular. The inclination of the air outlets 501 is 0°. At an angle of -70 degrees, the width of the cavity of the air outlet 501 near the interior of the duct 5 exceeds the width of the cavity near the outer wall of the duct 5. Preferably, the overall inclination of the cavity of the air outlet 501 is 45 degrees or 60 degrees. The inclined air outlet 501 can ensure that the duct 5 provides sufficient oxygen to the tobacco in the combustion chamber while preventing dust generated during tobacco combustion from entering the duct 5 through the air outlet 501. This effectively prevents the duct 5 from becoming clogged due to dust accumulation during use and reduces airflow costs. The probability of pipe 5 becoming blocked is reduced, effectively protecting the air duct 5 and extending its service life. The inclined air outlet 501 allows the air to be introduced towards the bottom of the combustion chamber, thus preventing the air introduced by the air duct 5 from blowing the tobacco sticks upwards and avoiding the tobacco sticks flying upwards and affecting the combustion speed of the tobacco sticks. The receiving tray 7 not only provides an installation support position for the high-temperature splicing support frame 8, but also provides a support mechanism for the tobacco sticks, allowing the tobacco sticks to remain in the combustion chamber of the furnace body 1 for a long time.

[0016] It should be noted that one end of the air duct 5 extends out of the furnace body 1, and the other end of the air duct 5 extends out of the receiving tray 7 and is equipped with a baffle 502. The cross-sectional shape of the baffle 502 is "T" shaped. The cross-sectional shape of the air duct 5 is "L" shaped. The top of the vertical section of the air duct 5 is provided with an opening. The baffle 502 can protect the opening to prevent the soot and ash generated in the combustion chamber from entering the air duct 5 from top to bottom through the opening. The horizontal length of the baffle 502 exceeds the horizontal width of the opening.

[0017] In this embodiment, the high-temperature resistant splicing support 8 is located on the receiving tray 7. The high-temperature resistant splicing support 8 consists of a collar 801 sleeved on the outer wall of the air duct 5 and several sets of support plates 803 arranged in a ring on the collar 801. The top of the collar 801 is provided with a mounting groove 802 for inserting the ends of the support plates 803. The depth of the mounting groove 802 exceeds the thickness of the support plate 803. The mounting groove 802 has a rectangular shape when viewed from above. Several sets of support plates 803 are arranged in a ring. On the collar 801, the outer bottom surface of the support plate 803 is not attached to the inner wall of the furnace body 1; the inner ring diameter of the collar 801 is not less than the outer diameter of the air duct 5; the outer side of the support plate 803 is provided with support rods 804 at intervals. The cross-sectional shape of the support plate 803 is an inverted "L" shape. The setting of the support rods 804 can expand the overall cross-sectional area of ​​the support plate 803, so as to suspend a large area of ​​tobacco stems, which facilitates the rapid combustion of tobacco stems. The overall shape of the support rods 804 is a cylindrical structure.

[0018] It should be noted that the high-temperature resistant splicing support 8 can be made of, but is not limited to, high-temperature resistant materials. High-temperature resistant materials such as metals, ceramics, or ceramic-based composites are all suitable for the manufacture of the high-temperature resistant splicing support 8. The air duct 5 can also be made of high-temperature resistant materials. This is to prevent the splicing support and air duct 5 from being damaged or deformed due to high temperatures during use. This allows the splicing support to stably support the air duct 5, improves the overall stability of the air duct 5 when it is used vertically, and extends the service life of the air duct 5.

[0019] In this flue-stalk combustion fluidized bed boiler, flue-stalks and combustion aids are poured into the combustion chamber through the flue-stalk feed pipe 3 and fuel pipe 4, respectively. Then, the air duct 5 is connected to an air supply system such as a blower to fill the combustion chamber with air. The high-temperature resistant splicing support frame 8 suspends the bottom of the introduced flue-stalks, allowing the filled air to fully contact the suspended flue-stalks. When the flue-stalks and flame retardant in the combustion chamber are ignited together, the suspended flue-stalks are in full contact with the air, achieving rapid and complete combustion of the flue-stalks. The ash from the combusted flue-stalks is collected at the bottom of the furnace body 1 through the through hole 701, and the ash is guided away from the combustion chamber using a slag remover and other facilities.

[0020] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0021] The above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be understood that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present utility model, and these all fall within the protection scope of the present utility model. In the present utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "joining", "fixing", etc. should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components. Among them, there are various ways of detachable installation, such as by plugging and snapping, or by bolt connection, etc.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tobacco shive combustion fluidized bed boiler, characterized by: The furnace includes a furnace body with a combustion chamber and a boiler drum installed on top of the furnace body. A tobacco feed pipe and a fuel pipe are distributed from top to bottom on one side of the furnace body. A receiving tray is placed horizontally inside the furnace body, and an air duct is erected above the receiving tray inside the furnace body. The air duct is used to introduce air into the combustion chamber. The outer wall of the air duct is provided with a high-temperature resistant splicing support for suspending the tobacco. The part of the air duct located in the combustion chamber has several sets of air outlets diagonally opened from bottom to top. The overall cross-sectional shape of each set of air outlets is trapezoidal. The high-temperature resistant splicing support is located on the receiving plate. The high-temperature resistant splicing support consists of a collar sleeved on the outer wall of the air duct and several sets of support plates distributed in a ring on the collar. The top of the collar is provided with a mounting groove for the end of the support plate to be inserted.

2. The tobacco stem combustion fluidized bed boiler according to claim 1, characterized in that: The inclination of the air outlet cavity is 0-70 degrees, and the width of the air outlet cavity near the inside of the duct exceeds the width of the air outlet cavity near the outer wall of the duct.

3. The tobacco stem combustion fluidized bed boiler according to claim 1, characterized in that: The outer side of the support plate is provided with struts at intervals, and the cross-sectional shape of the support plate is an inverted "L" shape.

4. The tobacco stem combustion fluidized bed boiler according to claim 1, characterized in that: The upper surface of the receiving tray has a through hole, and the inner side wall of the furnace body is equipped with support blocks for supporting the receiving tray at intervals.

5. The tobacco stem combustion fluidized bed boiler according to claim 1, characterized in that: One end of the air duct extends out of the furnace body, and the other end of the air duct extends out of the position above the receiving tray where a cover is installed, and the cross-sectional shape of the cover is "T" shaped.

6. The tobacco stem combustion fluidized bed boiler according to claim 1, characterized in that: The duct has an "L" shaped cross-section, and the top of the vertical section of the duct has an opening.

Images