Lime high-precision and uniform discharging device suitable for waste incineration power plant

Abstract

The utility model belongs to the technical field of lime weighing and feeding of waste incineration power plants, and relates to a high-precision and uniform lime blanking device suitable for waste incineration power plants, which comprises a lime pre-feeding system, a uniform feeding and weighing system and a spiral conveying system which are sequentially arranged from top to bottom. Through the cooperation of the lime pre-feeding system, the uniform feeding and weighing system and the spiral conveying system, lime can be accurately metered in real time, uniform feeding is achieved, the sealing effect is good, and the production efficiency is improved. The main problems that a lime weighing system in an existing waste incineration power plant is inaccurate in metering, the system is prone to being blocked, discharging is uneven, and equipment leaks ash can be solved in a targeted mode, and the lime weighing system can be widely applied to the waste incineration power plant lime feeding system.

Description

Technical Field

[0001] The utility model belongs to the technical field of lime weighing and feeding in a garbage incineration power plant, and relates to a high-precision and uniform lime feeding device suitable for a garbage incineration power plant. Background Art

[0002] As an important practical form of my country's "zero-waste city", the waste incineration power generation industry has achieved clean, efficient and low-carbon incineration under the joint promotion of national attention and industry efforts, enhancing the foundation of my country's low-carbon, circular, green and high-quality development in urban and rural areas.

[0003] In order to control the emission index and make the treated incineration flue gas meet the "Standard for Pollution Control of Domestic Waste Incineration" (GB18485-2014), environmental protection investment is an important part of the total investment of the waste incineration power plant project. Among them, environmental protection consumables lime is a necessary material for removing SO2 from the flue gas generated by waste incineration. Therefore, in the daily operation of the waste incineration power plant, the stable and continuous investment of the lime feeding system is very important. However, the current lime weighing feeding system of the waste incineration power plant often has multiple problems such as inaccurate lime metering, easy system blockage, uneven material feeding, and equipment ash leakage.

[0004] Therefore, it is urgently needed to propose a high-precision and uniform lime feeding device suitable for waste incineration power plants to solve the above problems. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a high-precision and uniform lime feeding device suitable for waste incineration power plants, so as to solve the multiple problems existing in the lime weighing and feeding system of waste incineration power plants, such as inaccurate lime metering, easy system blockage, uneven feeding, and equipment ash leakage.

[0006] In order to achieve the above object, the utility model provides the following technical solutions:

[0007] A high-precision and uniform lime feeding device suitable for a waste incineration power plant, comprising a lime pre-feeding system, a uniform feeding and weighing system and a screw conveying system arranged in sequence from top to bottom;

[0008] The lime pre-feeding system comprises a lime hopper, a pre-feeding bin and a pre-feeding discharge pipe which are sequentially connected from top to bottom, and a pre-feeding paddle which rotates around the axis of the pre-feeding bin is provided in the pre-feeding bin to sweep the lime in the pre-feeding bin into the pre-feeding discharge pipe connected to the bottom of the pre-feeding bin;

[0009] The uniform feeding and weighing system comprises a weighing system feed pipe, a weighing bin and a weighing system discharge pipe which are sequentially connected from top to bottom, and a discharge paddle rotating around the axis of the weighing bin is provided in the weighing bin to sweep the lime in the weighing bin into the weighing system discharge pipe connected to the bottom of the weighing bin, and the pre-feed discharge pipe is connected to the weighing system feed pipe, and a weighing sensor for weighing is provided on the weighing bin to detect the weight of the lime in the weighing bin;

[0010] The screw conveying system includes a screw conveying system feed hopper, a screw conveying structure, a locking bellows and a lime conveying main pipe. The weighing system discharge pipe is connected to the screw conveying system feed hopper. The screw conveying system feed hopper is connected to the locking bellows through the screw conveying structure. The locking bellows is connected to the lime conveying main pipe to convey the lime into the lime conveying main pipe.

[0011] Furthermore, the lime pre-feeding system also includes a pre-feeding motor and a pre-feeding reducer for driving the pre-feeding paddle and arranged below the pre-feeding bin body, and the pre-feeding motor is transmission-connected to the pre-feeding paddle via the pre-feeding reducer.

[0012] Furthermore, the uniform feeding and weighing system also includes a weighing system motor and a weighing system reducer for driving the unloading paddle and arranged below the weighing bin body, and the weighing system motor is transmission-connected to the unloading paddle via the weighing system reducer.

[0013] Furthermore, there are 12 material discharge paddles, which are evenly spaced along the circumferential direction to divide the space inside the weighing bin into 12 small chambers to ensure uniform lime discharge and avoid material blockage.

[0014] Furthermore, a material observation mirror is provided on the top of the weighing bin body to observe the material in the weighing bin body.

[0015] Furthermore, it also includes a support bracket as a support structure for a uniform feeding and weighing system, and cross springs connected to the bottom of the support bracket are provided at both ends of the top of the weighing bin to suspend the weighing bin;

[0016] A supporting cross bar is provided between the two supporting brackets, and the supporting cross bar is used to pull up the weighing sensor to achieve weighing of the weighing bin body by the weighing sensor.

[0017] Furthermore, the screw conveying system also includes a screw conveying motor, a coupling and a bearing box, and the screw conveying motor, coupling and bearing box are arranged on the side of the screw conveying structure away from the lock bellows, and the screw conveying motor is transmission-connected to the screw conveying structure through a coupling and a bearing box connected in sequence.

[0018] Furthermore, the spiral conveying structure includes a spiral conveying pipeline and an internal spiral structure rotatably installed in the spiral conveying pipeline, and the internal spiral structure is transmission-connected to the bearing box.

[0019] Furthermore, the air lock box is a cavity for connecting the spiral conveying pipe and the lime conveying main pipe, and the spiral conveying pipe is inserted into the air lock box, and an air lock valve is provided at the discharge end of the spiral conveying pipe to compress the discharge end of the spiral conveying pipe when the spiral conveying structure is not in operation.

[0020] Furthermore, the pre-feeding discharge pipe and the weighing system feed pipe, and the weighing system discharge pipe and the screw conveying system feed hopper may be connected by an inserted sleeve or a bellows to avoid interference of the tension of the pipeline connection on the weighing sensor.

[0021] The beneficial effects of the utility model are:

[0022] The utility model provides a high-precision and uniform lime feeding device suitable for a waste incineration power plant. Through the cooperation of a lime pre-feeding system, a uniform feeding and weighing system and a spiral conveying system, the device can accurately measure the lime in real time and feed it evenly, and has a good sealing effect. It can specifically solve the main problems of inaccurate measurement of the lime weighing system in the current waste incineration power plant, easy blockage of the system, uneven feeding, ash leakage of equipment, etc., and can be widely used in the lime feeding system of the waste incineration power plant.

[0023] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, in which:

[0025] Figure 1 It is a structural schematic diagram of a high-precision and uniform lime feeding device suitable for waste incineration power plants;

[0026] Figure 2 It is a perspective wireframe structure diagram of the lime pre-feeding system;

[0027] Figure 3 A perspective wireframe structure diagram of a uniform feeding and weighing system;

[0028] Figure 4It is a structural schematic diagram of the screw conveying system;

[0029] Figure 5 It is a partial perspective schematic diagram of the wire frame structure of the spiral conveying system.

[0030] Reference numerals: lime pre-feeding system 1, uniform feeding and weighing system 2, screw conveying system 3, support bracket 4, support crossbar 5;

[0031] Lime pre-feeding system 1: lime hopper 1.1, pre-feeding bin 1.2, pre-feeding paddle 1.3, pre-feeding reducer 1.4, pre-feeding motor 1.5, pre-feeding discharge pipe 1.6;

[0032] Uniform feeding and weighing system 2: weighing system feed pipe 2.1, cross spring 2.2, weighing system motor 2.3, weighing sensor 2.4, weighing system reducer 2.5, material observation mirror 2.6, weighing system discharge pipe 2.7, weighing bin 2.8, discharge paddle 2.9;

[0033] Screw conveying system 3: Screw conveying system feed hopper 3.1, screw conveying motor 3.2, coupling 3.3, bearing box 3.4, screw conveying structure 3.5, air lock box 3.6, support base 3.7, lime conveying mother pipe 3.8, air lock valve 3.9, internal screw structure 3.10, screw conveying pipeline 3.11. DETAILED DESCRIPTION

[0034] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. The following embodiments and the features in the embodiments can be combined with each other without conflict.

[0035] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present utility model. In order to better illustrate the embodiments of the present utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0036] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0037] See also Figure 1 to Figure 5 , which is a high-precision and uniform lime feeding device suitable for waste incineration power plants, installed between the lime storage tank of the waste incineration power plant and the lime delivery mother pipe 3.8, and used to transport the lime in the lime storage tank of the waste incineration power plant to the lime delivery mother pipe 3.8. The device includes a lime pre-feeding system 1, a uniform feeding and weighing system 2, and a screw conveying system 3 arranged in sequence from top to bottom;

[0038] The lime pre-feeding system 1 comprises a lime lower hopper 1.1, a pre-feeding bin body 1.2, a pre-feeding paddle 1.3, a pre-feeding reducer 1.4, a pre-feeding motor 1.5 and a pre-feeding discharge pipe 1.6. The feed port of the lime lower hopper 1.1 is connected to the lime storage tank of the waste incineration power plant, the discharge port of the lime lower hopper 1.1 is connected to the pre-feeding bin body 1.2, and a discharge port connected to the pre-feeding discharge pipe 1.6 is provided at the bottom of the pre-feeding bin body 1.2. A pre-feeding paddle 1.3 rotating around the axis of the pre-feeding bin body 1.2 is provided in the pre-feeding bin body 1.2, and under the rotation of the pre-feeding paddle 1.3, the lime in the pre-feeding bin body 1.2 is continuously swept into the discharge port of the pre-feeding bin body 1.2, and then sent into the pre-feeding discharge pipe 1.6;

[0039] The pre-feeding motor 1.5 is connected to the pre-feeding paddle 1.3 via the pre-feeding reducer 1.4 to drive the pre-feeding paddle 1.3 to rotate.

[0040] The uniform feeding and weighing system 2 comprises a weighing system feed pipe 2.1, a cross spring 2.2, a weighing system motor 2.3, a weighing sensor 2.4, a weighing system reducer 2.5, a material observation mirror 2.6, a weighing system feed pipe 2.7, a weighing bin body 2.8, and a feed paddle 2.9;

[0041] The pre-feeding discharge pipe 1.6 is connected to the weighing system feed pipe 2.1, and the weighing system feed pipe 2.1 is connected to the weighing bin 2.8. The bottom of the weighing bin 2.8 is provided with a discharge port connected to the weighing system discharge pipe 2.7, and the weighing bin 2.8 is provided with a discharge paddle 2.9 rotating around the axis of the weighing bin 2.8;

[0042] Preferably, there are 12 feeding paddles 2.9, which are evenly spaced along the circumferential direction to divide the space inside the weighing bin into 12 small chambers, thereby ensuring uniform lime feeding and avoiding material blockage in the feeding system.

[0043] The weighing system motor 2.3 is connected to the material unloading paddle 2.9 through the weighing system reducer 2.5 to drive the material unloading paddle 2.9 to rotate; a material observation mirror 2.6 is provided on the top of the weighing bin body 2.8 to observe the material in the weighing bin body 2.8.

[0044] Specifically, a weighing sensor 2.4 is provided on the weighing bin body 2.8, and cross springs 2.2 are provided at both ends of the top of the weighing bin body 2.8, and the two cross springs 2.2 are respectively connected to support brackets 4 serving as support structures for uniform feeding and weighing system 2, so that the weighing bin body 2.8 is suspended, and a support cross bar 5 is provided between the two support brackets 4, and the support cross bar 5 is used to pull up the weighing sensor 2.4, thereby realizing the weighing of the weighing bin body 2.8.

[0045] The screw conveying system 3 includes a screw conveying system feed hopper 3.1, a screw conveying motor 3.2, a coupling 3.3, a bearing box 3.4, a screw conveying structure 3.5, a lock bellows 3.6 and a lime conveying mother pipe 3.8. The weighing system discharge pipe 2.7 is connected to the screw conveying system feed hopper 3.1, the screw conveying system feed hopper 3.1 is connected to the lock bellows 3.6 through the screw conveying structure 3.5, and the lock bellows 3.6 is connected to the lime conveying mother pipe 3.8 to convey the lime to the lime conveying mother pipe 3.8;

[0046] The screw conveying motor 3.2 is connected to the screw conveying structure 3.5 through a coupling 3.3 and a bearing box 3.4 connected in sequence, so as to drive the internal screw structure 3.10 in the screw conveying structure 3.5 to rotate, thereby realizing the conveying function of the screw conveying structure 3.5.

[0047] Specifically, the spiral conveying structure 3.5 includes a spiral conveying pipe 3.11 and an internal spiral structure 3.10 rotatably installed in the spiral conveying pipe 3.11, and the internal spiral structure 3.10 is transmission-connected to the bearing box 3.4, and further rotates under the action of the spiral conveying motor 3.2.

[0048] The air lock box 3.6 is a cavity for connecting the spiral conveying pipe 3.11 and the lime conveying mother pipe 3.8, and the spiral conveying pipe 3.11 is inserted into the air lock box 3.6, and an air lock valve 3.9 is provided at the discharge end of the spiral conveying pipe 3.11, and there is a gap between the end of the internal spiral structure 3.10 and the air lock valve 3.9, so as to compress the discharge end of the spiral conveying pipe 3.11 when the spiral conveying structure 3.5 is not running, so as to ensure the sealing of the equipment and avoid material leakage.

[0049] Specifically, the air lock valve 3.9 is a spring pressure cover, that is, it presses the discharge end of the spiral conveying pipe 3.11 under the action of spring force. When the internal spiral structure 3.10 rotates to make lime accumulate continuously at the discharge end of the spiral conveying pipe 3.11, the spring force can be overcome to push the air lock valve 3.10 open, so that the lime is successfully transported to the air lock box 3.6 and then enters the lime conveying main pipe 3.8.

[0050] Specifically, it also includes a support base 3.7, which serves as a bearing platform for the screw conveying system feed hopper 3.1, the screw conveying motor 3.2, the coupling 3.3, the bearing box 3.4, the screw conveying structure 3.5, the lock bellows 3.6 and the lime conveying mother pipe 3.8.

[0051] Preferably, the pre-feeding discharge pipe 1.6 and the weighing system feed pipe 2.1, and the weighing system discharge pipe 2.7 and the screw conveying system feed hopper 3.1 can be connected by an inserted sleeve or a bellows to avoid interference of the tension of the pipeline connection on the weighing sensor.

[0052] The working principle of the above-mentioned high-precision and uniform lime feeding device suitable for waste incineration power plants is as follows:

[0053] The lime in the lime storage tank falls into the pre-feeding bin 1.2 through the lime discharge hopper 1.1, and the pre-feeding motor 1.5 rotates and drives the pre-feeding paddle 1.3 to rotate and sweep the lime in the pre-feeding bin 1.3 to continuously flow into the pre-feeding discharge pipe 1.6 through the transmission of the pre-feeding reducer 1.4;

[0054] The material evenly falls to the weighing system feed pipe 2.1 through the pre-feeding discharge pipe 1.6 and reaches the weighing bin 2.8. The weighing system motor rotates 2.3 and drives the 12 discharge paddles 2.9 to rotate clockwise through the weighing system reducer 2.5. The material reaches the weighing system discharge pipe 2.7 after being measured by the weighing sensor 2.4.

[0055] The lime then enters the screw conveying system hopper 3.1 through the weighing system discharge pipe 2.7, and then enters the screw conveying structure 3.5. The screw conveying motor 3.2 drives the screw conveying structure 3.5 through the coupling 3.3 and the bearing box 3.4 to send the material lime into the lock bellows 3.6, and finally falls into the lime conveying mother pipe 3.7, and is transported to the back-end equipment by the conveying pipeline.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. A high-precision and uniform lime feeding device suitable for waste incineration power plants, characterized by: It includes a lime pre-feeding system, a uniform feeding and weighing system and a screw conveying system which are arranged in sequence from top to bottom; The lime pre-feeding system comprises a lime hopper, a pre-feeding bin and a pre-feeding discharge pipe which are sequentially connected from top to bottom, and a pre-feeding paddle which rotates around the axis of the pre-feeding bin is provided in the pre-feeding bin to sweep the lime in the pre-feeding bin into the pre-feeding discharge pipe connected to the bottom of the pre-feeding bin; The uniform feeding and weighing system comprises a weighing system feed pipe, a weighing bin and a weighing system discharge pipe which are sequentially connected from top to bottom, and a discharge paddle rotating around the axis of the weighing bin is provided in the weighing bin to sweep the lime in the weighing bin into the weighing system discharge pipe connected to the bottom of the weighing bin, and the pre-feed discharge pipe is connected to the weighing system feed pipe, and a weighing sensor for weighing is provided on the weighing bin to detect the weight of the lime in the weighing bin; The screw conveying system includes a screw conveying system feed hopper, a screw conveying structure, a locking bellows and a lime conveying main pipe. The weighing system discharge pipe is connected to the screw conveying system feed hopper. The screw conveying system feed hopper is connected to the locking bellows through the screw conveying structure. The locking bellows is connected to the lime conveying main pipe to convey the lime into the lime conveying main pipe.

2. The high-precision and uniform lime feeding device suitable for waste incineration power plants according to claim 1 is characterized in that: The lime pre-feeding system further comprises a pre-feeding motor and a pre-feeding reducer which are used to drive the pre-feeding paddle and are arranged below the pre-feeding bin body, and the pre-feeding motor is drivingly connected to the pre-feeding paddle via the pre-feeding reducer.

3. The high-precision and uniform lime feeding device suitable for waste incineration power plants according to claim 1 is characterized in that: The uniform feeding and weighing system also includes a weighing system motor and a weighing system reducer for driving the unloading paddle and arranged below the weighing bin body, and the weighing system motor is transmission-connected to the unloading paddle via the weighing system reducer.

4. The high-precision and uniform lime feeding device suitable for waste incineration power plants according to claim 1 is characterized in that: There are 12 material discharge paddles, which are evenly spaced along the circumferential direction to divide the space inside the weighing bin into 12 small chambers to ensure even lime discharge and avoid material blockage.

5. The high-precision and uniform lime feeding device suitable for waste incineration power plants according to claim 1 is characterized in that: A material observation mirror is arranged on the top of the weighing bin body to observe the material in the weighing bin body.

6. The high-precision and uniform lime feeding device suitable for waste incineration power plants according to claim 1 is characterized in that: It also includes a support bracket as a support structure for a uniform feeding and weighing system, and cross springs connected to the bottom of the support bracket are provided at both ends of the top of the weighing bin to suspend the weighing bin; A supporting cross bar is provided between the two supporting brackets, and the supporting cross bar is used to pull up the weighing sensor to achieve weighing of the weighing bin body by the weighing sensor.

7. The high-precision and uniform lime feeding device suitable for waste incineration power plants according to claim 1 is characterized in that: The screw conveying system also includes a screw conveying motor, a coupling and a bearing box, and the screw conveying motor, the coupling and the bearing box are arranged on the side of the screw conveying structure away from the lock bellows, and the screw conveying motor is transmission-connected to the screw conveying structure through the coupling and the bearing box connected in sequence.

8. The high-precision and uniform lime feeding device suitable for waste incineration power plants according to claim 7 is characterized in that: The spiral conveying structure comprises a spiral conveying pipeline and an internal spiral structure rotatably installed in the spiral conveying pipeline, and the internal spiral structure is transmission-connected to the bearing box.

9. The high-precision and uniform lime feeding device suitable for waste incineration power plants according to claim 8 is characterized in that: The air lock box is a cavity used to connect the spiral conveying pipeline and the lime conveying main pipe, and the spiral conveying pipeline is inserted into the air lock box, and an air lock valve is provided at the discharge end of the spiral conveying pipeline to compress the discharge end of the spiral conveying pipeline when the spiral conveying structure is not in operation.

10. The high-precision and uniform lime feeding device suitable for waste incineration power plants according to claim 7, characterized in that: The pre-feeding discharge pipe and the weighing system feed pipe, and the weighing system discharge pipe and the screw conveying system feed hopper can be connected by an inserted sleeve or a bellows to avoid interference of the tension of the pipeline connection on the weighing sensor.

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