Steam boiler for burning wet barks and weeds

Abstract

The utility model discloses a steam boiler for burning wet barks and weeds. The steam boiler comprises a hearth and a boiler body. The device further comprises a pusher and a reciprocating grate. The reciprocating grate is obliquely arranged in the hearth; the reciprocating grate comprises a plurality of grate units which are arranged in a step shape from top to bottom; the lower end of the reciprocating grate is connected with a slag receiving hopper and a slag extractor; a feeding hole is formed in the upper end of the reciprocating grate; the feeding hole is communicated with the hopper; the pusher reciprocates on one side of the feeding hole; the pusher is used for pushing fuel in the hopper to the feed port and enabling the fuel to fall on the reciprocating grate; the steam boiler solves the problem that an existing steam boiler for burning biomass materials can only burn materials with low water content and can not be directly used for materials with high water content such as wet barks and weeds.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a steam boiler for burning wet bark weeds. Background Art

[0002] In the 21st century, energy shortage and environmental pollution have become the focus of global attention. Non-renewable energy such as oil, coal and natural gas has limited reserves, increasingly tight supply and demand, and high prices, so it is urgent to find clean energy to burn. At present, the combustion raw materials of steam boilers include natural gas, coal and biomass materials. And biomass fuel mainly refers to agricultural and forestry waste. At present, there are many boilers burning biomass materials. For example, China's public patent CN204153754 U records a biomass-burning steam boiler, including a main body, a furnace, a front arch, a rear arch and a steam boiler are arranged inside the main body, the front arch and the rear arch are respectively arranged on both sides of the furnace, the steam boiler is arranged above the furnace, the front arch is provided with a secondary air inlet pipe, and the two ends of the secondary air inlet pipe are respectively connected to the furnace and the steam boiler, and a feed hopper is provided on the side of the outside of the main body close to the front arch, and a material dispenser is provided in the feed hopper, and a conveyor belt that can transfer materials in the feed hopper to the furnace is provided below the feed hopper and the furnace.

[0003] However, this type of steam boiler that burns biomass materials has certain requirements for the moisture content of biomass materials, requiring a moisture content of 15% to 20%. But for agricultural and forestry waste, the moisture content of wet bark and weeds that have not been dried is generally 20% to 30%. These materials need to be processed before they can be used as biomass fuel, which increases the process and cost issues. Utility Model Content

[0004] The utility model aims to solve the problem that the existing steam boilers burning biomass materials can only burn materials with low water content but cannot directly use materials with high water content such as wet bark weeds, and provides a steam boiler for burning wet bark weeds.

[0005] The purpose of the utility model is achieved through the following technical solutions: a steam boiler for burning wet bark and weeds, comprising a furnace and a boiler; further comprising a pusher and a reciprocating grate; the reciprocating grate is tiltedly arranged in the furnace; the reciprocating grate comprises a plurality of grate units arranged in a stepped manner from top to bottom; a slag receiving hopper and a slag discharger are connected to the lower end of the reciprocating grate; a feed port is arranged at the upper end of the reciprocating grate; the feed port is connected to the hopper; the pusher reciprocates on one side of the feed port; the pusher is used to push the fuel in the hopper to the feed port and drop it on the reciprocating grate;

[0006] Furthermore, the pusher includes a push cylinder and a push plate; the push cylinder drives the push plate to move back and forth and pushes the fuel to fall from the feed port;

[0007] Furthermore, the grate unit includes rollers and grate plates; the rollers are arranged on the beam frame in order from high to low; the grate plates are arranged on the rollers;

[0008] Furthermore, the bottom of the reciprocating furnace is also connected to a cooling mechanism; the cooling mechanism is used to cool the bottom of the reciprocating furnace; the cooling mechanism includes a cold water pipe arranged in a serpentine shape at the bottom of the reciprocating furnace beam frame; one end of the cold water pipe is a water inlet; the other end of the cold water pipe is a water outlet;

[0009] Furthermore, the slag discharger includes a horizontal conveying section and an inclined conveying section; the horizontal conveying section is arranged at the bottom of the slag receiving bucket; the inclined conveying section is used to lift the slag out of the furnace;

[0010] Furthermore, a rear arch and a front arch are arranged in the furnace; a throat is formed between the front arch and the rear arch; a secondary air distribution mechanism is arranged on the rear arch; the secondary air distribution mechanism is used to introduce air at the throat;

[0011] A further technical solution is that a front smoke box is provided at one end of the boiler; a rear smoke box is provided at the other end of the boiler; the rear smoke box is connected to the economizer, the dust collector and the induced draft fan in sequence through the smoke and air duct.

[0012] The utility model has the following advantages:

[0013] 1. The pusher moves back and forth on one side of the feed hopper to push the fuel and control the amount of fuel. The fuel is pushed by the pusher to the upper end of the reciprocating furnace, and then moves downward from the upper end of the reciprocating furnace step by step, so that the wet bark and weeds with high water content can be gradually dried in the upper part of the reciprocating furnace until they reach the ignition point, and then burn on the reciprocating furnace. The burnt slag shakes with the shaking of the reciprocating grate, and finally falls into the slag receiving bucket and is discharged by the slag discharger at the bottom of the slag receiving bucket;

[0014] 2. The utility model dries the wet material in the front part of the furnace through reciprocating furnace discharge, reduces the moisture, makes the fuel in the rear part burn more completely, and improves the thermal efficiency of the boiler. At the same time, the environmental protection effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 It is a partial structural schematic diagram of the utility model.

[0017] Figure 3 It is a schematic diagram of the internal structure of the utility model from one viewing angle.

[0018] Figure 4 This is a schematic diagram of the internal structure of the utility model from another perspective.

[0019] In the figure: 1. furnace; 2. boiler; 3. pusher; 4. reciprocating grate; 5. grate unit; 6. slag hopper; 7. slag discharger; 8. feed inlet; 9. hopper; 10. push cylinder; 11. push plate; 12. roller; 13. grate plate; 14. cooling mechanism; 15. cold water pipe; 16. water inlet; 17. water outlet; 18. front arch; 19. rear arch; 20. throat; 21. secondary air distribution mechanism; 22. front smoke box; 23. rear smoke box; 24. economizer. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Example 1: Figures 1 to 4 As shown, a steam boiler 2 for burning wet bark and weeds includes a furnace 1 and a boiler 2; it also includes a pusher 3 and a reciprocating grate 4; the reciprocating grate 4 is tiltedly arranged in the furnace 1; the reciprocating grate 4 includes a plurality of grate units 5 arranged in a stepped manner from top to bottom; the lower end of the reciprocating grate 4 is connected to a slag receiving hopper 6 and a slag discharger 7; a feed port 8 is arranged on one side of the upper end of the reciprocating grate 4; the feed port 8 is connected to the hopper 9; the pusher 3 reciprocates on one side of the feed port 8; the pusher 3 is used to push the fuel in the hopper 9 to the feed port 8 and drop it on the reciprocating grate 4; in this embodiment, the boiler 2 is arranged above the furnace 1, and the flue gas generated by the combustion of the furnace 1 enters the boiler 2 to heat the boiler 2 to generate steam. In this embodiment, the pusher 3 moves back and forth at one side of the feed opening of the feed hopper 9 to push the fuel and control the amount of fuel. The fuel enters the upper end of the reciprocating furnace 4 through the pusher 3, and then moves downward from the upper end of the reciprocating furnace 4 step by step, so that the wet bark and weeds with high water content can be gradually dried in the upper part of the reciprocating furnace 4 until they reach the ignition point, and then burned on the reciprocating furnace 4. The burnt slag shakes with the shaking of the reciprocating grate 4, and finally falls into the slag hopper 6, and is discharged by the slag discharger 7 at the bottom of the slag hopper 6. The reciprocating furnace 4 allows the wet material to be dried in the front part of the furnace 1, reducing the moisture, so that the fuel in the rear part burns more fully, the thermal efficiency of the boiler 2 is higher, and the environmental protection effect is better.

[0027] The pusher 3 includes a pushing cylinder 10 and a pushing plate 11; the pushing cylinder 10 drives the pushing plate 11 to move back and forth and pushes the fuel to fall from the feed port 8; in this embodiment, the pushing cylinder 10 adopts a conventional commercially available product, and any type of cylinder can be selected according to needs to drive the pushing plate 11 to move back and forth. Through the reciprocating movement of the pushing plate 11, the fuel in the hopper 9 passes through the feed port 8 in batches, and then falls onto the reciprocating furnace 4, and moves downward step by step on the reciprocating furnace 4. As the temperature increases from high to low, the fuel on the reciprocating furnace 4 is dried step by step until it reaches the ignition point and begins to burn.

[0028] The grate unit 5 includes rollers 12 and grate plates 13; the rollers 12 are arranged on the beam frame in sequence from high to low; the grate plates 13 are arranged on the rollers 12; in this embodiment, the rollers 12 are rotatably installed on the beam frame, and the beam frame is tilted to drive the grate plates 13 to flip, so that the reciprocating grate 4 can drive the fuel to move downward step by step.

[0029] The bottom of the reciprocating furnace 4 is also connected to a cooling mechanism 14; the cooling mechanism 14 is used to cool the bottom of the reciprocating furnace 4; the cooling mechanism 14 includes a cold water pipe 15 which is serpentinely coiled and arranged at the bottom of the beam frame of the reciprocating furnace 4; one end of the cold water pipe 15 is a water inlet 16; the other end of the cold water pipe 15 is a water outlet 17; in this embodiment, the cold water pipe 15 of the cooling mechanism 14 is serpentinely coiled, that is, S-shaped coiled, to extend the contact time, and by arranging the cooling mechanism 14 at the bottom of the reciprocating furnace 4, the bottom beam frame of the reciprocating furnace 4 is cooled by cold water, thereby avoiding high-temperature deformation of the beam frame of the reciprocating grate 4, thereby affecting the reciprocating motion.

[0030] The slag discharger 7 includes a horizontal conveying section and an inclined conveying section; the horizontal conveying section is arranged at the bottom of the slag receiving bucket 6; the inclined conveying section is used to lift the slag out of the furnace 1; in this embodiment, the slag discharger 7

[0031] A rear arch 19 and a front arch 18 are provided in the furnace 1; a throat 20 is formed between the front arch 18 and the rear arch 19; a secondary air distribution mechanism 21 is provided on the rear arch 19; the secondary air distribution mechanism 21 is used to introduce air at the throat 20; in this embodiment, the secondary air distribution mechanism 21 includes an air distribution main pipe and air distribution branches arranged at intervals on the air distribution main pipe, the air distribution main pipe is buried in the wall of the rear arch 19, and the air distribution branch pipe delivers the air on the air distribution main pipe into the throat 20, forms a vortex for the flue gas at the throat 20, fully mixes it with the air, and heats the front arch 18, so that the wet material in the front section of the reciprocating grate 4 under the front arch 18 is dried, reducing moisture, thereby improving ignition conditions.

[0032] A front smoke box 22 is provided at one end of the boiler 2; a rear smoke box 23 is provided at the other end of the boiler 2; the rear smoke box 23 is connected to the economizer 24, the dust collector, and the induced draft fan in sequence through the smoke and air duct; in this embodiment, the smoke enters the boiler 2 through the front smoke box 22, heats the water in the boiler 2, and then is discharged through the rear smoke box 23, and then passes through the economizer 24 and the dust collector, and is led to the chimney by the induced draft fan for discharge.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A steam boiler for burning wet bark weeds, comprising a furnace and a boiler; characterized in that: It also includes a pusher and a reciprocating grate; the reciprocating grate is tiltedly arranged in the furnace; the reciprocating grate includes a plurality of grate units arranged in a stepped manner from top to bottom; the lower end of the reciprocating grate is connected to a slag receiving hopper and a slag discharger; a feed port is arranged at the upper end of the reciprocating grate; the feed port is connected to the hopper; the pusher reciprocates on one side of the feed port; the pusher is used to push the fuel in the hopper to the feed port and drop it on the reciprocating grate.

2. The steam boiler for burning wet bark weeds according to claim 1, characterized in that: The pusher comprises a push cylinder and a push plate; the push cylinder drives the push plate to move back and forth and pushes the fuel to fall from the feed port.

3. The steam boiler for burning wet bark weeds according to claim 1, characterized in that: The grate unit comprises rollers and grate plates; the rollers are arranged in sequence from high to low on the beam frame; and the grate plates are arranged on the rollers.

4. The steam boiler for burning wet bark weeds according to claim 1, characterized in that: The bottom of the reciprocating grate is also connected to a cooling mechanism; the cooling mechanism is used to cool the bottom of the reciprocating grate; the cooling mechanism includes a cold water pipe coiled in a serpentine shape and arranged at the bottom of the reciprocating grate beam frame; one end of the cold water pipe is a water inlet; the other end of the cold water pipe is a water outlet.

5. The steam boiler for burning wet bark weeds according to claim 1, characterized in that: The slag discharger comprises a horizontal conveying section and an inclined conveying section; the horizontal conveying section is arranged at the bottom of the slag receiving bucket; the inclined conveying section is used to lift the slag and output it from the furnace.

6. The steam boiler for burning wet bark weeds according to claim 1, characterized in that: A rear arch and a front arch are arranged in the furnace; a throat is formed between the front arch and the rear arch; a secondary air distribution mechanism is arranged on the rear arch; the secondary air distribution mechanism is used to introduce air at the throat.

7. The steam boiler for burning wet bark weeds according to claim 1, characterized in that: A front smoke box is arranged at one end of the boiler; a rear smoke box is arranged at the other end of the boiler; the rear smoke box is connected with the economizer, the dust collector and the induced draft fan in sequence through the smoke and air duct.

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