CN114152033A

CN114152033A - Biomass drying equipment

Info

Publication number: CN114152033A
Application number: CN202111487728.8A
Authority: CN
Inventors: 王晓东; 董长青; 周嘉傲; 朱雁军; 胡笑颖; 刘长瑞; 吕海洋
Original assignee: NATIONAL BIO ENERGY GROUP CO LTD; North China Electric Power University
Current assignee: NATIONAL BIO ENERGY GROUP CO LTD; North China Electric Power University
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-03-08
Anticipated expiration: 2041-12-07
Also published as: CN114152033B

Abstract

The invention discloses a biomass drying device, comprising: the system comprises a tower body, a coil heater, a power plant cooling water circulation pipeline and a sunlight guide-in system. The tower body is provided with a drying cavity. The coil heater is located in the drying cavity and connected to the water source type heat pump. And the power plant cooling water circulating pipeline is connected to the water source type heat pump. The sunlight introducing system is arranged on the tower body and used for introducing light rays irradiating the surface of the tower body into the drying cavity. The biomass drying equipment realizes the drying of biomass in the form of coupling of circulating cooling water waste heat of a biomass power plant and solar energy, makes full use of resources in the regional range of the power plant, and improves the comprehensive utilization efficiency of energy.

Description

Biomass drying equipment

Technical Field

The invention relates to the technical field of biomass drying, in particular to biomass drying equipment.

Background

In the 21 st century, with the rapid development of global economy and the continuous advance of industrialization, the world energy consumption has been greatly increased. The biomass energy is also developed rapidly, and becomes an indispensable part in the new energy industry increasingly. The biological energy generating capacity and the biological fuel yield of China are also steadily improved. In recent years, according to data of the international energy agency, biomass energy has an extremely bright prospect in the world, particularly in China. Although coal remains the primary energy source, the trend toward reduced coal removal is the primary trend.

The biomass energy is a renewable clean energy source with no pollution and zero emission. The biomass resource of China is rich, and the application prospect is wide. Straw is one of the most commonly used biomass fuels, but the initial water content of the straw can reach more than 50 percent, which is not beneficial to long-term storage of the straw and also influences the combustion efficiency of the straw, thereby influencing the utilization efficiency of biomass.

The existing method for drying biomass generally utilizes special heating equipment to heat the biomass, and the heating equipment needs to consume a large amount of electric energy or biomass fuel, thereby causing certain energy waste. Moreover, the existing circulating cooling water of the power plant has certain heat, but is not utilized, so that certain energy waste is caused.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

The invention aims to provide biomass drying equipment, which utilizes sunlight and waste heat of a power plant and improves the comprehensive utilization efficiency of energy.

In order to achieve the purpose, the application provides the following technical scheme:

a biomass drying apparatus comprising:

a tower body having a drying chamber;

the coil heater is positioned in the drying cavity and is connected to the water source type heat pump;

the power plant cooling water circulation pipeline is connected to the water source type heat pump;

the sunlight guide-in system, the sunlight guide-in system set up in on the tower body, the sunlight guide-in system is used for will shining in the leading-in dry intracavity of light on tower body surface.

Optionally, the sunlight guiding system includes a light collector and a diffuser, the light collector is located outside the tower body, the diffuser is disposed inside the drying cavity, and a light guide assembly is disposed between the light collector and the diffuser;

the light irradiated on the light collector is conducted to the diffuser through the light guide component.

Optionally, the light guide assembly includes an optical connection portion and an optical fiber, the optical connection portion is located at a light collection end of the light collector, one end of the optical fiber is connected to the optical connection portion, and the other end of the optical fiber is connected to the diffuser;

the light irradiated on the light collector is collected on the light-receiving part and is transmitted to the diffuser through the optical fiber.

Optionally, the sunlight guiding system includes a plurality of light collectors and a plurality of diffusers, each light collector is disposed at a different position on the tower body surface, and each diffuser is disposed toward the coil heater.

Optionally, the biomass drying equipment comprises a wind power generation device, an air outlet is formed in the top of the tower body and communicated with the drying cavity, and the wind power generation device is arranged on the air outlet.

Optionally, the tower body includes a main tower body and a necking tower body, the drying cavity includes a first drying cavity disposed in the main tower body and a second drying cavity disposed in the necking tower body, the coil heater is disposed in the first drying cavity, and the air outlet is disposed at an end of the necking tower body away from the main tower body;

and the cross section area of the second drying cavity is gradually reduced in the direction from the main tower body to the air outlet.

Optionally, the longitudinal section of the necking tower body is hyperbolic.

Optionally, the biomass drying equipment further comprises a bag-type dust collector and a dust collecting device;

the dust collecting device and the bag-type dust collector are sequentially arranged in the direction from the main tower body to the air outlet.

Optionally, the dust collecting device comprises a dust hopper and a dust conveying device;

the dust collecting hopper is provided with a collecting port and a discharge port, the collecting port is positioned below the bag-type dust collector, one end of the dust conveying device is connected with the discharge port, and the other end of the dust conveying device extends to the outside of the tower body.

Optionally, the biomass drying equipment further comprises a material turning device, and the material turning device extends into the drying cavity.

By adopting the technical scheme, the invention has the following beneficial effects:

the biomass drying equipment realizes the drying of biomass in the form of coupling of circulating cooling water waste heat of a biomass power plant and solar energy, makes full use of resources in the regional range of the power plant, and improves the comprehensive utilization efficiency of energy.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention to its proper form. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic structural diagram of a biomass drying device provided in an embodiment of the present application;

fig. 2 is a schematic diagram of a matching structure of a coil heater and a water source type heat pump of a biomass drying device provided by an embodiment of the application;

FIG. 3 is a schematic diagram of one construction of a coil heater;

FIG. 4 is a schematic top view of a portion of a biomass drying apparatus;

fig. 5 is a schematic structural diagram of a sunlight guide system of a biomass drying device according to an embodiment of the present disclosure.

In the figure, 1, a tower body; 11. a main tower body; 12. a necking tower body; 2. a coil heater; 3. a water source heat pump; 5. a sunlight introducing system; 51. a light collector; 52. a diffuser; 53. a light-receiving section; 54. an optical fiber; 6. a wind power generation device; 7. a bag-type cutter; 8. a dust collecting device; 81. a dust collecting hopper; 82. a dust conveying device; 9. a material turning device.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or assembly must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 5, an embodiment of the present application provides a biomass drying apparatus, including: the system comprises a tower body 1, a coil heater 2, a power plant cooling water circulating pipeline (not shown) and a sunlight guide-in system 5. The tower 1 has a drying chamber. And the coil heater 2 is positioned in the drying cavity, and the coil heater 2 is connected to the water source type heat pump 3. And the cooling water circulation pipeline of the power plant is connected with the water source type heat pump 3. The sunlight introducing system 5 is arranged on the tower body 1, and the sunlight introducing system 5 is used for introducing light rays irradiated on the surface of the tower body 1 into the drying cavity.

In the embodiment, circulating cooling water of a biomass power plant is used as a heat source, a water source type heat pump 3 is adopted to generate stable hot water of 60 ℃, the hot water is fed into a coil heater 2, heat is transferred to a biomass material layer from the bottom of the biomass, and the biomass is heated, the temperature is raised, and moisture is diffused to ambient air.

The coil pipes in the coil pipe heater 2 can be laid in a disc-shaped track arrangement mode, and biomass materials can be uniformly heated. And the pipeline arrangement mode of the coil heater 2 can be changed according to actual needs in actual production. The actual pipeline connection is not limited to the one shown in the drawings, and the connection mode can be made in different forms, and all the forms are included in the protection scope of the present invention.

In a possible embodiment, referring to fig. 5, the sunlight guiding system comprises a light collector 51 and a diffuser 52, wherein the light collector 51 is located outside the tower body 1, the diffuser 52 is arranged inside the drying chamber, and a light guiding assembly is arranged between the light collector 51 and the diffuser 52. The light irradiated on the light collector 51 is transmitted to the diffuser 52 through the light guide element, and then irradiated on the biomass by the diffuser 52. The biomass can be stacked above the coil heater 2, the invention utilizes the heat of the circulating cooling water of the biomass power plant system as the drying heat source at the bottom of the fuel, and utilizes the solar energy as the drying heat source at the top of the biomass, thereby obviously improving the drying efficiency. The sunlight guiding system 5 of the present application may be provided with a large number of light collectors 51, and each light collector 51 is uniformly distributed on the entire outer wall of the tower body 1 to obtain more solar energy. And the sunlight is only guided into the drying cavity and is not converted into other forms of energy, so that energy loss caused by energy conversion is avoided.

Referring to fig. 5, in a possible embodiment, the light guiding assembly includes a light-receiving portion 53 and optical fibers 54, the light-receiving portion 53 is located at a light-collecting end of the light collector 51, and one end of the optical fiber 54 is connected to the light-receiving portion 53, and the other end is connected to the diffuser 52. The light irradiated on the light collector 51 is collected at the light-receiving portion 53 and transmitted to the diffuser 52 through the optical fiber 54.

The light collector 51 collects and converges sunlight in a small range by using the principle of transmission and refraction, thereby increasing the power density of sunlight and collecting sunlight meeting the illumination requirement. The collected sunlight transmits light energy in a light transmission mode through the optical fibers 54, the light energy is transmitted to the diffuser 52 according to requirements, and the sunlight transmitted to the tail end of the optical fibers 54 is uniformly and efficiently scattered to the surface of the indoor biomass material by the diffuser 52. The light collector 51 may be a transparent structure and has a light-collecting function, and may be, for example, a convex lens structure, and collects sunlight on a large surface onto the light-receiving portion 53 having a small area, the light-receiving portion 53 may be made of a material having a good light-guiding performance, and the light-receiving portion 53 has a light-receiving surface on which sunlight is irradiated and further transmitted to the optical fiber 54. The diffuser 52 has the function of dispersing the high-density solar light, for example, the diffuser 52 can be a concave lens, and the high-density solar light is dispersed to the surface of the biomass material, so that the uniform drying effect is achieved.

In a possible embodiment, the sunlight guiding system comprises a plurality of light collectors 51 and a plurality of diffusers 52, each light collector 51 is disposed at a different position on the surface of the tower body 1, and the effective area for absorbing sunlight is increased, for example, each light collector 51 is disposed sequentially along the circumference of the tower body 1, and each diffuser 52 is disposed toward the coil heater 2 and can be disposed at a different position toward the coil heater 2. Through the orientation of each diffuser 52 of rational arrangement, can realize evenly scattering sunshine on indoor biomass material surface high-efficiently, reach full coverage, even dry effect.

In a possible embodiment, referring to fig. 1, the biomass drying equipment comprises a wind power generation device 6, the top of the tower body 1 is provided with an air outlet which is communicated with the drying cavity, and the wind power generation device 6 is arranged on the air outlet. In the embodiment, the coil heater 2 and the sunlight introducing system 5 heat the biomass material, when the temperature in the drying cavity rises, the rising airflow is formed in the drying cavity and is discharged from the air outlet, and the wind power generation device 6 generates power by using the airflow. The biomass drying plant may comprise a plurality of wind power plants 6, thus forming a wind power generator cluster.

In a possible embodiment, the tower body 1 includes a main tower body 11 and a necking tower body 12, the drying chamber including set up in the first drying chamber of the main tower body 11 with set up in the second drying chamber of the necking tower body 12, coil heater 2 set up in first drying chamber, necking tower body 12 deviates from the one end setting of the main tower body 11 the air outlet. In the direction from the main tower body 11 to the air outlet, the cross-sectional area of the second drying cavity is gradually reduced.

In this embodiment, a first drying chamber is used to house the biomass, while a second drying chamber is used to direct the gas out. In this application embodiment, living beings are heated the back, and the air is heated the expansion density and is reduced, produces the density difference with the outer cold air of tower, produces the smoke window effect, makes the inside air of drying chamber flow to the top of the tower naturally, and the cross sectional area of second drying chamber reduces gradually simultaneously and has formed the venturi effect, makes the interior gas flow rate of tower improve, provides gas-solid separation and the required energy of wind power generation.

In one possible embodiment, the longitudinal cross-sectional shape of the necking tower 12 is hyperbolic.

In this embodiment, the necking tower body 12 is designed as a hyperbolic tower structure because a hyperbolic natural draft effect is the best. Under the irradiation of sunlight, the temperature in the first drying cavity is increased, the pressure is reduced, and air flows from bottom to top due to the air pressure difference generated by the height. Dust and moisture on the surface of the biomass material flow to the upper part of the equipment along with the upward airflow, and the venturi effect is shown in the phenomenon that when the limited flow passes through a reduced flow section, the flow velocity of the fluid is increased, and the flow velocity is inversely proportional to the flow section. The narrow opening in the middle of the tower body can increase the flow velocity of air flow, so that dust and moisture on the surface of the biomass material are transported upwards more quickly, and the drying efficiency of the biomass material is improved. Meanwhile, as the airflow is increased and the wind power is strengthened, the generating efficiency of the wind turbine can be improved.

In the tower type with the curved surface, the rotating curved surface is the simplest in shape, and for convenience of construction, the rotating curved surface with a circular cross section is selected for the tower type. The design of narrowing the middle and widening the bottom ensures that the area of the air inlet can be larger under the same area, which is beneficial to increasing the air quantity. The most common building material concrete compressive strength is high and tensile strength is not enough, and this application tower body top design helps increasing bulk strength for hyperbolic structure. Thus, the choice of hyperbolic tower is the best choice of material properties, optimal design and engineering practices to influence each other.

In a possible embodiment, see fig. 1, the biomass drying plant further comprises a bag dust collector 7 and a dust collecting device 8. The dust collecting device 8 and the bag-type dust collector 7 are sequentially arranged in the direction from the main tower body 11 to the air outlet. The dust meets the bag-type dust collector 7 in the upward movement path of the air flow, the dust is attached to the bag-type dust collector 7, and the clean air continues to flow upward.

In a possible embodiment, the dust collecting device 8 comprises a dust hopper 81 and a dust transporting device 82. The dust collecting hopper 81 is provided with a collecting port and a discharging port, the collecting port is positioned below the bag-type dust collector 7, one end of the dust conveying device 82 is connected with the discharging port, and the other end of the dust conveying device extends to the outside of the tower body 1. The dust and the moisture generated by drying flow upwards together with the air due to heating, the airflow enters the cloth bag dust removing device through the flow guiding device to carry out gas-solid separation, the separated dust falls into the dust collecting hopper 81 and is conveyed out of the device by the dust conveying device 82, and the clean airflow passes through the cloth bag and flows into the wind driven generator cluster device. The wind driven generator cluster utilizes the air flowing out of the outlet of the bag-type dust collector 7 to push the wind driven generator to generate electricity and supply the electricity to the equipment, and then the air flows out of the air outlet upwards.

In a possible embodiment, the biomass drying equipment further comprises a material turning device 9, and the material turning device 9 extends into the drying cavity.

In the environment with sunlight, the air in the drying cavity is heated, the heated expansion density of the air is reduced, the air and cold air outside the tower generate density difference, the air naturally flows to the top of the tower, and simultaneously, a hyperbolic structure generates a smoke window effect and a Venturi effect, so that the gas flow speed in the tower is improved, and the energy required by gas-solid separation and wind power generation is provided. When the biomass material is dry, the biomass material turning device 9 works regularly, and the biomass material which is flatly paved on the coil heater 2 is plowed, so that the biomass material can be uniformly heated. Dust generated by the turning of the biomass material layer and moisture generated by drying flow upwards together with air due to the heating, the airflow rises to enter the bag-type dust collector to carry out gas-solid separation, the separated dust falls into the dust hopper 81 and is conveyed out of the equipment by the dust conveying device 82, and clean airflow passes through the bag and flows into the wind driven generator cluster. Air flowing out of the outlet of the bag-type dust collector 7 is used for pushing the wind power generation device and supplying power to the equipment for use. For example, a rotation power can be provided to the material turning device 9, and then the air flows upwards out of the air outlet at the top of the tower body 1.

When no sunlight irradiates the tower body 1 in the environment without sunlight, such as at night or in cloudy days, the upward air flow in the tower body 1 is generated by a smoke window effect and a venturi effect generated by a hyperbolic structure, and the air flow rate is low. Whereby the ascending air stream carries less dust and moisture, resulting in lower drying efficiency. Due to the low air flow rate, the running power of the wind driven generator cluster is also reduced. Under the condition, the device mainly uses circulating cooling water of a biomass power plant as a heat source, and a water source type heat pump 3 generates stable hot water with the temperature of 60 ℃ to be injected into a coil heater 2 to dry biomass materials.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A biomass drying apparatus, comprising:

a tower body having a drying chamber;

2. The biomass drying apparatus of claim 1, wherein the sunlight guiding system comprises a light collector and a diffuser, the light collector is located outside the tower body, the diffuser is disposed inside the drying chamber, and a light guiding assembly is disposed between the light collector and the diffuser;

3. The biomass drying apparatus according to claim 2, wherein the light guide assembly comprises an optical connection portion and an optical fiber, the optical connection portion is located at a light collection end of the light collector, one end of the optical fiber is connected to the optical connection portion, and the other end of the optical fiber is connected to the diffuser;

4. The biomass drying apparatus of claim 2, wherein the sunlight induction system comprises a plurality of light collectors and a plurality of diffusers, each light collector being disposed at a different location on the tower surface, and each diffuser being disposed toward the coil heater.

5. The biomass drying equipment according to claim 1, wherein the biomass drying equipment comprises a wind power generation device, an air outlet is formed in the top of the tower body, the air outlet is communicated with the drying cavity, and the wind power generation device is arranged on the air outlet.

6. The biomass drying device according to claim 5, wherein the tower body comprises a main tower body and a necking tower body, the drying chamber comprises a first drying chamber arranged in the main tower body and a second drying chamber arranged in the necking tower body, the coil heater is arranged in the first drying chamber, and the air outlet is arranged at one end of the necking tower body, which is far away from the main tower body;

7. The biomass drying plant of claim 6, wherein the longitudinal cross-section of the necking tower body is hyperbolic.

8. The biomass drying equipment according to claim 5, further comprising a bag-type dust collector and a dust collecting device;

9. The biomass drying apparatus according to claim 8, wherein the dust collecting device comprises a dust hopper and a dust conveying device;

10. The biomass drying apparatus of claim 1, further comprising a material flipping device extending into the drying chamber.