Impurity removal device of fire coal coupling biomass power generation system

Abstract

The utility model discloses an impurity removal device of a fire coal coupling biomass power generation system, belongs to the technical field of fire coal coupling biomass power generation, and is mainly used for removing impurities during straw feeding. The utility model aims to provide an impurity removal device of a fire coal coupling biomass power generation system, which comprises a crusher, a conveying pipeline, a material passing fan, boiler equipment and a material receiving hopper, and two ends of the conveying pipeline are respectively communicated with the material passing hopper and the material passing fan. An adjusting air pipe which is transversely arranged and communicates with the outside further communicates with the receiving hopper, the adjusting air pipe and the conveying pipeline are oppositely arranged, a transverse channel is formed in the receiving hopper, and the lower portion of the transverse channel further communicates with an impurity removing chamber which is vertically arranged and located below the receiving hopper; one end, communicated with the boiler equipment, of the conveying pipeline is higher than one end, communicated with the receiving hopper, of the conveying pipeline; the device can remove impurities, prevents the impurities from being sucked into the impeller and damaging the impeller, and ensures the stable operation of the material passing fan and the biomass power generation process system.

Description

Technical Field

[0001] This utility model relates to the field of coal-fired power generation coupled with biomass power generation, and in particular to a purification device for a coal-fired power generation coupled with biomass power generation system. Background Technology

[0002] Coal-fired biomass power generation is a method of generating electricity by mixing biomass fuels, such as agricultural and forestry waste, desert plants, trees, and livestock manure, with coal and then burning them in existing large-scale coal-fired power boilers. This method uses biomass to replace part of the coal, combining the mature technology of traditional coal-fired power generation with the zero carbon emissions of biomass energy, thereby improving energy efficiency and reducing carbon emissions.

[0003] Existing coal-fired biomass power generation systems include crushers, feed fans, and boiler equipment. The crusher pulverizes agricultural and forestry waste, plants, and other materials. The pulverized materials are then transported to the boiler equipment for combustion via a high-speed airflow generated by the feed fan. However, straw, wheat, and other stalk crops may contain impurities such as soil, stones, and even iron blocks during harvesting, storage, and transportation. If these impurities are sucked into the impeller by the feed fan, they will damage the impeller and disrupt the dynamic balance of the impeller or rotor, seriously affecting the operational stability of the biomass feed fan and the biomass power generation system. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a purification device for a coal-fired biomass power generation system. It is mainly used to remove impurities when feeding straw-type materials, so as to avoid impurities being sucked into the impeller, which would damage the dynamic balance of the impeller or rotor, and ensure the stable operation of the feed fan and the biomass power generation process system.

[0005] This utility model discloses a purification device for a coal-fired biomass power generation system, comprising a crusher, a conveying pipe, a material conveying fan, and a boiler. A receiving hopper is located below the crusher. One end of the conveying pipe is connected to the receiving hopper, and the other end is connected to the inlet pipe of the material conveying fan and is positioned opposite to the fan. The outlet pipe of the material conveying fan is vertically positioned and connected to the boiler. A horizontally positioned regulating duct is also connected to the receiving hopper. The regulating duct and the conveying pipe are positioned opposite each other within the receiving hopper to form a horizontal channel. A vertically positioned purification chamber is connected below the horizontal channel and is located at the lower end of the receiving hopper. The end of the regulating duct furthest from the receiving hopper is connected to the outside. The end of the conveying pipe connected to the boiler is higher than the end connected to the receiving hopper.

[0006] Furthermore, a filter screen is provided at the end of the regulating air duct away from the receiving hopper.

[0007] As a preferred embodiment, the regulating duct is further provided with a vertically arranged airflow regulating baffle, which is movably disposed within the regulating duct.

[0008] Furthermore, the bottom of the impurity removal device is equipped with a sliding door.

[0009] Furthermore, the angle θ between the conveying pipe and the horizontal plane is 18°-45°.

[0010] Furthermore, a square-round joint is provided between the receiving hopper and the conveying pipe.

[0011] In a preferred embodiment, the square-round section is fixedly connected to the conveying pipeline, and the square-round section is detachably connected to the receiving hopper.

[0012] Furthermore, the impurity removal chamber is equipped with an iron remover.

[0013] Furthermore, the height of the impurity removal chamber is ≥500mm.

[0014] Furthermore, the material particle size of the pulverizer is ≤50mm.

[0015] The beneficial effects of this invention are as follows: The device crushes straw-like materials using a crusher. The straw-like materials enter the receiving hopper, and then, through the adjustment of the air duct, the inclined conveying pipe, and the suction of the conveying fan, the less dense straw-like materials are quickly sucked into the conveying pipe and transported to the boiler equipment. Meanwhile, denser impurities such as soil, stones, and iron pieces fall into the impurity removal chamber located at the bottom of the receiving hopper, thus cleaning and removing impurities from the straw-like materials. Simultaneously, the inclined conveying pipe further removes impurities. Because impurities have a higher density and mass, when they enter the inclined conveying pipe, their gravity exceeds the suction force of the conveying fan, causing them to fall back into the impurity removal chamber. This ensures that the aforementioned impurities do not enter the conveying fan, causing damage to the impeller and ensuring the stable operation of the conveying fan and the coal-fired biomass power generation process system. Attached Figure Description

[0016] Figure 1 Schematic diagram of the impurity removal device in a coal-fired biomass power generation system;

[0017] Reference numerals in the attached drawings: 1-Crusher; 2-Collection hopper; 3-Conveying pipe; 31-Square section; 4-Passing fan; 41-Inlet pipe of the passing fan; 42-Outlet pipe of the passing fan; 43-Impeller; 5-Regulating duct; 51-Filter screen; 52-Airflow regulating baffle; 6-Impurity removal chamber; 61-Insert door; 62-Iron separator; 7-Transverse passage. Detailed Implementation

[0018] The present invention will be further described below.

[0019] This utility model provides a purification device for a coal-fired biomass power generation system, mainly used for removing impurities during straw feeding. It includes a crusher 1, a conveying pipe 3, a material conveying fan 4, and a boiler. A receiving hopper 2 is located below the crusher 1. One end of the conveying pipe 3 is connected to the receiving hopper 2, and the other end is connected to the inlet pipe 41 of the material conveying fan and is positioned opposite to the material conveying fan 4. The outlet pipe 42 of the material conveying fan is vertically positioned and connected to the boiler. A horizontally arranged regulating air duct 5 is also connected to the receiving hopper 2. The regulating air duct 5 and the conveying pipe 3 are positioned opposite each other within the receiving hopper 2 to form a horizontal channel 7. A vertically arranged purification chamber 6 is connected below the horizontal channel 7. The purification chamber 6 is located at the lower end of the receiving hopper 2. The end of the regulating air duct 5 away from the receiving hopper 2 is connected to the outside. The end of the conveying pipe 3 connected to the boiler is higher than the end connected to the receiving hopper 2.

[0020] like Figure 1As shown, the impurity removal device of the coal-fired biomass power generation system includes a crusher 1. A receiving hopper 2 is provided at the discharge port of the crusher 1. The receiving hopper 2 is installed at the discharge port of the crusher 1 by flange connection or bolt connection. A conveying pipe 3 and a regulating air pipe 5 are connected to the side of the receiving hopper 2. The regulating air pipe 5 and the conveying pipe 3 are arranged opposite each other in the receiving hopper 2 to form a transverse channel 7. The other end of the conveying pipe 3 is connected to the inlet pipe 41 of the material conveying fan. The other end of the regulating air pipe 5 is connected to the external environment. The suction action of the material conveying fan 4 increases the air flow in the conveying pipe 3, and the material is drawn from the receiving hopper 2 to the boiler equipment for combustion. However, due to the high density of impurities such as soil, stones, and iron blocks... Straw-like materials have a low density. For the same particle size, impurities such as soil, stones, and iron blocks weigh more than straw-like materials. Therefore, under the suction of the conveying fan 4, straw-like materials are more easily sucked into the boiler equipment. Impurities such as soil, stones, and iron blocks fall into the impurity removal chamber 6 located below the receiving hopper 2, thus removing impurities from the straw-like materials. Furthermore, the inclined conveying pipe 3 can further remove impurities entering the conveying pipe 3. Because impurities have a higher density and greater mass, when they enter the inclined conveying pipe 3, they will fall back into the impurity removal chamber 6 due to gravity exceeding the suction force of the conveying fan 4, ensuring that impurities do not enter the conveying fan 4 and cause damage to the impeller of the conveying fan 4. The impurity removal device of the aforementioned coal-fired biomass power generation system uses a crusher 1 to crush straw-like materials. The straw-like materials enter the receiving hopper 2, and then, through the regulating air duct 5, the inclined conveying pipe 3, and the suction of the conveying fan 4, the less dense straw-like materials are quickly sucked into the conveying pipe 3 and then transported to the boiler equipment. The denser impurities such as soil, stones, and iron pieces fall into the impurity removal chamber 6 located at the bottom of the receiving hopper 2, thus cleaning and removing impurities from the straw-like materials. At the same time, the inclined conveying pipe 3 removes impurities again. Because the impurities have a higher density and mass, when they enter the inclined conveying pipe 3, they will fall back into the impurity removal chamber 6 due to their gravity being greater than the suction force of the conveying fan 4. This ensures that the above-mentioned impurities do not enter the conveying fan 4 and cause damage to the impeller of the conveying fan 4, thus ensuring the stable operation of the conveying fan 4 and the coal-fired biomass power generation process system. Specifically, when using this impurity removal device, the material conveying fan 4 is started first, followed by the crusher. When stopping the device, the crusher is stopped first, followed by the material conveying fan 4. Under normal circumstances, the receiving hopper 2 does not store material. The straw has a very low density and is easily sucked away by the material conveying fan 4. Therefore, the crushed straw will be directly sucked away by the material conveying fan 4 and enter the boiler equipment for incineration. Only denser soil, stones, and iron blocks fall into the impurity removal chamber 6 at the bottom of the receiving hopper 2 to clean and remove impurities from the straw materials.

[0021] To prevent impurities in the outside air from entering the boiler equipment for combustion through the regulating air duct 5 and conveying pipe 3, or from affecting the rotation of the material conveying fan 4, such as Figure 1 As shown, a filter screen 51 is provided at the end of the regulating air duct 5 furthest from the receiving hopper 2; by setting the filter screen 51, large particles of debris from the external environment are effectively intercepted from entering the conveying pipe 3, thus preventing them from affecting or damaging the fan blades of the conveying blower 4. As a preferred method, to facilitate control of the air volume within the conveying pipe 3 and adapt to the conveying of straw materials of different diameters after crushing, such as... Figure 1 As shown, the regulating duct 5 is also equipped with a vertically arranged airflow regulating baffle 52. The airflow regulating baffle 52 is movably disposed within the regulating duct 5, and the upper end of the airflow regulating baffle 52 is also equipped with a locking member for fixing the airflow regulating plate. Specifically, the airflow regulating baffle 52 can be rotatably disposed within the regulating duct 5 via a rotating shaft. The rotating shaft drives the airflow regulating baffle 52 to rotate, thereby controlling the distance between the bottom of the airflow regulating baffle 52 and the bottom of the regulating duct 5, thus controlling the size of the air inlet of the regulating duct 5. In this case, the position of the airflow regulating plate can be fixed without the need for a locking member. The airflow regulating baffle 52 can also be slidably disposed within the regulating duct 5. Specifically, the airflow regulating plate and the regulating duct 5 can be directly connected by insertion, i.e. A strip-shaped hole is made at the top of the regulating duct 5 for the air volume regulating plate to pass through. The air volume regulating plate is then inserted into the regulating duct 5 through the strip-shaped hole. The size of the air inlet of the regulating duct 5 is controlled by moving the air volume regulating plate up and down, thereby controlling the air volume of the material conveying fan 4. The position of the air volume regulating plate is fixed with a locking device to prevent the position of the air volume regulating plate from changing during use, which would prevent impurities in the material from being separated. A locking device is also installed on the regulating duct 5 to fix the position of the air volume regulating plate inserted into the regulating duct 5. The locking device can be a bolt, pin, or other component that directly penetrates the air volume regulating plate laterally. The bolt, pin, etc., cannot continue to enter the regulating duct 5 through the strip-shaped hole, thus achieving the purpose of fixing the air volume regulating plate.

[0022] To facilitate the cleaning of impurities in the impurity removal chamber 6 and prevent excessive accumulation of impurities from entering the horizontal pipe and then flowing into the material conveying fan 4, such as... Figure 1As shown, the bottom of the impurity removal chamber 6 is movably connected to a door 61. Specifically, the door 61 is horizontally inserted into the impurity removal chamber 6. When it is necessary to clean the impurities in the impurity removal chamber 6, the door 61 is pulled outward to discharge the impurities downward for cleaning. The door 61 can also be rotatably mounted at the bottom of the impurity removal chamber 6 via a hinge. That is, a hinge is provided on one side of the door 61, and the other end of the hinge is provided on the side wall of the impurity removal chamber 6, so that the door 61 is rotatably mounted at the bottom of the impurity removal chamber 6. A latch is provided on the other side of the impurity removal chamber 6 to ensure that the door 61 is horizontally mounted at the bottom of the impurity removal chamber 6, so as to prevent materials from leaking directly from the impurity removal chamber 6. When it is necessary to clean the impurities, the latch is pulled out, so that the door 61 rotates downward due to gravity, opening the bottom of the impurity removal chamber 6 and allowing the impurities to be discharged downward for cleaning.

[0023] To ensure that the conveying pipeline 3 can transport materials while removing impurities that have been mixed into the conveying pipeline 3 due to excessive suction from the material handling fan 4, the angle θ between the conveying pipeline 3 and the horizontal plane is 18°-45°. By controlling the inclination angle of the conveying pipeline 3 between 18°-45°, impurities can fall back into the impurity removal chamber 6 due to their own gravity, and the wind force generated by the material handling fan 4 can be reduced, thus saving energy.

[0024] To facilitate the connection between the receiving hopper 2 and the conveying pipe 3, a square-round joint 31 is provided between the receiving hopper 2 and the conveying pipe 3. The square-round joint 31 refers to a pipe with a square cross-section at one end and a circular cross-section at the other. Since the receiving hopper 2 is typically square, while the inlet of the conveying blower 4 is circular, a square-round joint 31 is provided between the receiving hopper 2 and the conveying pipe 3 to facilitate the connection between the conveying pipe 3 and the receiving hopper 2 and ensure a smooth transition at the connection point. The square end of the square-round joint 31 is connected to the receiving hopper 2, and the circular end is connected to the conveying pipe 3, ensuring a smooth transition at the connection and preventing material from getting stuck at the connection point between the conveying pipe 3 and the receiving hopper 2. As a preferred embodiment, to reduce the connection error between the square-round joint 31 and the conveying pipe 3, the square-round joint 31 is fixed to the conveying pipe 3, specifically by welding or integral molding. To facilitate the replacement of the conveying pipe 3 to adapt to different material conveying methods, the square-round joint 31 and the receiving hopper 2 are detachably connected, specifically by bolt connection, flange connection, etc.

[0025] To ensure that metallic impurities mixed in with straw-like materials can be removed, the impurity removal chamber 6 is equipped with an iron separator 62. The disc iron separator 62 or the belt iron separator 62 can be installed on the side wall of the impurity removal chamber 6. Through a dual impurity removal method of gravity and magnetism, it can ensure that metallic impurities in straw-like materials can be removed, preventing metallic impurities from entering the feed fan 4, damaging the fan blades, affecting the normal use of the feed fan 4, and the normal operation of the entire coal-fired biomass power generation system.

[0026] To ensure that impurities in the impurity removal chamber 6 do not re-enter the conveying channel under the suction of the conveying fan 4, the height of the impurity removal chamber 6 is ≥500mm; by increasing the height of the impurity removal chamber 6, i.e. the depth of the impurity removal chamber 6, it is ensured that impurities falling into the impurity removal chamber 6 will not re-enter the conveying pipe 3.

[0027] To improve the removal of impurities from materials, the material crushing particle size of the crusher 1 is ≤50mm. By controlling the particle size of the crushed material, the weight of the crushed material is controlled, so that even when the airflow generated by the material conveying fan 4 is small, the crushed material can still be sucked into the conveying pipe 3 and transported to the boiler equipment for combustion. Meanwhile, the impurities have a large gravity and fall into the impurity removal chamber 6 due to gravity, thus achieving the removal of impurities from the material.

Claims

1. A purification device for a coal-fired biomass power generation system, characterized in that: The utility model relates to a kind of boiler equipment and its material feeding device, including pulverizer (1), conveying pipeline (3), material passing fan (4) and boiler equipment, the pulverizer (1) is equipped with receiving hopper (2) below, conveying pipeline (3) one end is communicated with receiving hopper (2), the other end is communicated with the inlet pipeline of material passing fan (4) and is oppositely arranged with material passing fan (4), the outlet pipeline of material passing fan (4) is vertically arranged and is communicated with boiler equipment;The receiving hopper (2) is also communicated with the adjusting air pipe (5) of transverse arrangement, the adjusting air pipe (5) is oppositely arranged with conveying pipeline (3) in receiving hopper (2) and forms a transverse passage (7), the lower side of the transverse passage (7) is also communicated with the vertically arranged impurity removal chamber (6), the impurity removal chamber (6) is located at the lower end of receiving hopper (2), the end of adjusting air pipe (5) away from receiving hopper (2) is communicated with outside, the end of conveying pipeline (3) being communicated with boiler equipment is higher than the end of conveying pipeline (3) being communicated with receiving hopper (2).

2. The impurity removal device of a coal-fired biomass power generation system according to claim 1, wherein: The end of adjusting air pipe (5) away from receiving hopper (2) is equipped with filter screen (51).

3. The impurity removal device of a coal-fired biomass power generation system according to claim 2, wherein: The adjusting air pipe (5) is also equipped with vertically arranged air volume adjusting baffle (52) in, the air volume adjusting baffle (52) is movably arranged in adjusting air pipe (5).

4. The impurity removal device of a coal-fired biomass power generation system according to claim 1, wherein: The bottom of impurity removal chamber (6) is movably connected with plug door (61).

5. The impurity removal device of a coal-fired biomass power generation system according to claim 1, wherein: The included angle θ between conveying pipeline (3) and horizontal plane is 18 °-45 °.

6. The impurity removal device of a coal-fired biomass power generation system according to claim 1, wherein: Receiving hopper (2) and conveying pipeline (3) are also equipped with square round section (31) between.

7. The impurity removal device of a coal-fired coupled biomass power generation system according to claim 6, characterized in that: The square round section (31) is fixedly connected with conveying pipeline (3), and the square round section (31) is detachably connected with receiving hopper (2).

8. The impurity removal device of a coal-fired biomass power generation system according to claim 1, wherein: The impurity removal chamber (6) is equipped with de-ironer (62) in.

9. The impurity removal device of a coal-fired biomass power generation system according to claim 1, wherein: The height of impurity removal chamber (6) is greater than or equal to 500 mm.

10. The impurity removal device of a coal-fired biomass power generation system according to claim 1, wherein: The material crushing particle size of pulverizer (1) is less than or equal to 50 mm.

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