Lime injection device located at rear arch of waste incinerator

Abstract

The utility model relates to a lime injection device located at the back arch of garbage incinerator, including fixed in the storage bin and lime injection gun of furnace wall, the storage bin is used for storing lime, the number of lime injection gun is two and rotates to start, two lime injection guns are V-shaped arrangement and the injection range is consistent, the storage bin is provided with the conveying pipeline and conveying mechanism that are communicated with the storage bin below and correspond with the lime injection gun one to one and convey lime along the conveying pipeline from top to bottom, the conveying pipeline lower extreme is provided with the quantitative input mechanism that gradually conveys the quantitative lime to the lime injection gun and the control mechanism that controls quantitative input mechanism and the communication or cut -off of lime injection gun between with the lime injection gun. Adopt above -mentioned plan, the utility model discloses a kind of accurate injection, save resource's lime injection device located at the back arch of garbage incinerator.

Description

Technical Field

[0001] This utility model relates to the field of waste incineration equipment, specifically to a lime spraying device located in the rear arch of a waste incinerator. Background Technology

[0002] Waste incinerators are modern solid waste treatment facilities. Through high-temperature incineration technology, they reduce and render harmless municipal solid waste, and utilize the heat generated to generate electricity or heat, thus achieving resource utilization of waste. This method significantly reduces landfill volume and is a highly efficient and environmentally friendly waste disposal method.

[0003] When garbage is incinerated, toxic and harmful gases are inevitably produced. These toxic and harmful gases need to be removed before being released into the atmosphere. The lime injection device is installed at the rear arch of the garbage incinerator. It injects lime into the incinerator to achieve the function of dry deacidification.

[0004] The existing lime spraying device includes a storage silo fixed to the furnace wall and a lime spraying gun. The storage silo is used to store lime, and a conveying pipe connected to the spraying channel of the lime spraying gun is set below the storage silo. A feeding screw is installed in the conveying pipe to push the lime downward.

[0005] However, in actual operation, the conveying process may be obstructed due to changes in air pressure in the spray channel or insufficient lime filling in the threads of the feeding screw. This results in the conveying of excessive lime to ensure the deacidification effect, which in turn leads to the waste of lime and increases the burden on subsequent dust filtration. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a lime spraying device located in the rear arch of a waste incinerator that can accurately spray and save resources.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a storage silo fixed to the furnace wall and lime spray guns. The storage silo is used to store lime. There are two lime spray guns that are activated alternately. The two lime spray guns are arranged in a V-shape and have the same spray range. The storage silo is provided with a conveying pipe connected to the bottom of the storage silo and corresponding to each lime spray gun, and a conveying mechanism for conveying lime from top to bottom along the conveying pipe. A quantitative input mechanism for gradually conveying a quantitative amount of lime to the lime spray gun and a control mechanism for controlling the quantitative input mechanism to connect or disconnect with the lime spray gun are provided between the lower end of the conveying pipe and the lime spray gun.

[0008] By adopting the above technical solution, when the lime spray gun is started, the control mechanism connects the quantitative input mechanism with the lime spray gun. The quantitative input mechanism gradually delivers a quantitative amount of lime to the lime spray gun, which then sprays it into the rear arch of the incinerator. After the lime has been completely delivered to the lime spray gun, the lime spray gun stops, and the control mechanism disconnects the quantitative input mechanism from the lime spray gun. The quantitative input mechanism prepares the lime required for the next spray. At the moment the lime spray gun stops or a few seconds before, another lime spray gun starts and repeats the above steps. Then, the two lime spray guns start in turn. The above-mentioned device has the following advantages: ① When the quantitative input mechanism is preparing the lime required for the next spray, the control mechanism cuts off the quantitative input mechanism from the lime spray gun, providing a stable environment for the quantitative input mechanism to prepare the quantitative lime required for the next spray. This avoids the problem of inaccurate spraying due to the screw not being filled with lime when the feeding screw is continuously feeding. It is also not affected by the air pressure in the spray channel, so there is no need to spray excessively to ensure the deacidification effect, thereby avoiding resource waste and increasing the burden on dust filtration; ② The two lime spray guns are arranged in a reasonable V-shape and start alternately. When the quantitative input mechanism of one lime spray gun is in the preparation stage, the other lime spray gun is working normally. This will not affect the smooth progress of dry deacidification, and the spray coverage area is in the same area, ensuring the deacidification effect.

[0009] The present invention is further configured as follows: the quantitative input mechanism includes a transfer chamber connected to the lower end of the conveying pipe and located on the side of the lime spray gun; a quantitative pipe is connected between the transfer chamber and the lime spray gun; the control mechanism is a control valve located at the connection between the quantitative pipe and the lime spray gun; a retraction pipe is provided on the other side of the transfer chamber opposite to the quantitative pipe; a pusher cylinder is provided on the retraction pipe; the pusher cylinder drives a pusher rod that reciprocates between the retraction pipe, the transfer chamber, and the quantitative pipe; when the control valve is closed, the pusher rod moves from the retraction pipe to the connection between the quantitative pipe and the transfer chamber, pushing the quantitative lime into and sealing it within the quantitative pipe; when the control valve is open, the pusher rod continues to move towards the retraction pipe, gradually conveying the quantitative lime to the lime spray gun.

[0010] By adopting the above technical solution, the conveying mechanism periodically transports lime from the storage bin to the transfer chamber. The pusher cylinder drives the lime to move from the retraction pipe through the transfer chamber to the metering pipe. During this movement, it first moves to the connection point between the metering pipe and the transfer chamber, pushing in the metered lime and sealing it within the metering pipe. Once another lime spray gun stops and the corresponding lime spray gun starts, the control valve opens, and the pusher rod continues to move towards the retraction pipe, gradually conveying the metered lime to the lime spray gun. The above structure has the following advantages: ① The metering pipe serves as the metering standard, and the space between the transfer chamber and the control valve represents the total input volume, ensuring metering accuracy; ② The pusher rod's thrust replaces the lime's own weight as the conveying force to transport the lime to the lime spray gun. Since the pusher rod's thrust is much greater than the air pressure in the spray channel, it effectively reduces the influence of the air pressure in the spray channel, making the conveying rate more uniform and stable; ③ Excess lime entering the transfer chamber is temporarily stored there for the next spray, maximizing resource utilization.

[0011] The present invention is further configured such that: the conveying mechanism includes a conveying motor fixed above the storage silo, a motor shaft extending into the storage silo is driven below the conveying motor, and a feeding screw located in the conveying pipe is fixedly installed at the lower end of the motor shaft.

[0012] By adopting the above technical solution, selecting a conveyor motor in conjunction with a feeding screw as the conveying mechanism, on the one hand, it can more accurately and quantitatively convey lime to the transfer chamber at the right time; on the other hand, it acts as a barrier between the transfer chamber and the storage silo, preventing excessive lime from falling and hindering the movement of the push rod.

[0013] The present invention is further configured such that: the conveying pipe is provided with a redundant space for storing lime below the feeding screw.

[0014] By adopting the above technical solution, the end space of the conveying pipeline is reasonably utilized as redundant space, which can accommodate excess lime while ensuring that the lime can completely cover the pusher rod. This ensures that the lime can fill the metering pipeline when the pusher rod pushes the lime into the metering pipeline, thereby improving the input accuracy of the metering input mechanism.

[0015] The present invention is further configured such that: a material hopper for gathering lime is provided at the connection between the storage silo and the conveying pipeline.

[0016] By adopting the above technical solution, a material-gathering hopper is added, which causes lime to gather towards the feeding screw, reducing the occurrence of lime not being fully filled between the threads of the feeding screw and improving feeding accuracy.

[0017] The present invention is further configured such that a vibrator is provided on the outside of the storage silo.

[0018] By adopting the above technical solution and adding a vibrator, on the one hand, the bridging and rat hole phenomena are solved, and storage problems such as adhesion to the bin walls and hanging material are reduced. On the other hand, the flow of lime is accelerated and the material gathering effect of the material gathering hopper is optimized. Attached Figure Description

[0019] Figure 1 The three-dimensional representation of the specific embodiment of this utility model Figure 1 ; Figure 2 The structural three-dimensional representation of this utility model Figure 2 ; Figure 3 This is a schematic diagram of the quantitative input mechanism. Detailed Implementation

[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] like Figure 1 — Figure 3As shown, this utility model discloses a lime spraying device located in the rear arch of a waste incinerator, including a storage bin 2 fixed to the furnace wall 1 and lime spraying guns 3. The storage bin 2 is used to store lime. There are two lime spraying guns 3, which are activated alternately. The two lime spraying guns 3 are arranged in a V-shape and have the same spraying range. The storage bin 2 is provided with a conveying pipe 4 connected to the bottom of the storage bin 2 and corresponding to the lime spraying guns 3, and a conveying mechanism for conveying lime from top to bottom along the conveying pipe 4. A quantitative input mechanism and a control mechanism for gradually conveying a quantitative amount of lime to the lime spraying guns 3 are provided between the lower end of the conveying pipe 4 and the lime spraying guns 3. The control mechanism connects or disconnects the lime spray gun 3 with the feed mechanism. When the lime spray gun 3 is started, the control mechanism connects the quantitative input mechanism with the lime spray gun 3. The quantitative input mechanism gradually feeds a quantitative amount of lime to the lime spray gun 3, which sprays it into the rear arch of the incinerator. After the lime is completely fed into the lime spray gun 3, the lime spray gun 3 stops. The control mechanism disconnects the quantitative input mechanism from the lime spray gun 3. The quantitative input mechanism prepares the lime required for the next spray. At the moment the lime spray gun 3 stops or a few seconds before, another lime spray gun 3 starts and repeats the above steps. Then, the two lime spray guns 3 are started in turn. The above-mentioned device has the following advantages: ① When the quantitative input mechanism is preparing the lime required for the next spray, the control mechanism cuts off the quantitative input mechanism from the lime spray gun 3, providing a stable environment for the quantitative input mechanism to prepare the quantitative lime required for the next spray. This avoids the problem of inaccurate spraying due to the screw not being filled with lime when the feeding screw is continuously feeding. It is also not affected by the air pressure in the spray channel, so there is no need to spray excessively to ensure the deacidification effect, thereby avoiding resource waste and increasing the burden on dust filtration; ② The two lime spray guns 3 are reasonably arranged in a V-shape and start alternately, so that when the quantitative input mechanism of one lime spray gun 3 is in the preparation stage, the other lime spray gun 3 is working normally, which will not affect the smooth progress of dry deacidification. Moreover, the spray coverage area is in the same area, ensuring the deacidification effect.

[0023] The quantitative input mechanism includes a transfer chamber 5 connected to the lower end of the conveying pipe 4 and located on the side of the lime spray gun 3. A quantitative pipe 51 is provided between the transfer chamber 5 and the lime spray gun 3. In the attached figure, the position where the lime spray gun 3 connects to the quantitative pipe 51 is the spray channel 31. The control mechanism is a control valve 52 located at the connection between the quantitative pipe 51 and the lime spray gun 3. The control valve 52 is preferably a pneumatic gate valve. A retraction pipe 53 is provided on the other side of the transfer chamber 5 opposite to the quantitative pipe 51. A pusher cylinder 54 is provided in the retraction pipe 53. The pusher cylinder 54 drives a pusher rod 55 that reciprocates between the retraction pipe 53, the transfer chamber 5, and the quantitative pipe 51. When the control valve 52 is closed, the pusher rod 55 moves away from the retraction pipe 53. The metering pipe 51 is moved to the connection point between the metering pipe 51 and the transfer chamber 5, and the metered lime is pushed in and sealed in the metering pipe 51. When the control valve 52 is opened, the pusher rod 55 continues to move towards the retraction pipe 53, gradually conveying the metered lime to the lime spray gun 3. The conveying mechanism periodically conveys lime from the storage bin to the transfer chamber 5. The pusher cylinder 54 drives the metering pipe 51 to move from the retraction pipe 53 through the transfer chamber 5 to the metering pipe 51. During the movement, it first moves to the connection point between the metering pipe 51 and the transfer chamber 5, pushes in the metered lime and seals it in the metering pipe 51. After the other lime spray gun 3 stops and the corresponding lime spray gun 3 starts, the control valve 52 is opened, and the pusher rod 55 continues to move towards the retraction pipe 53, gradually conveying the metered lime to the lime spray gun 3. The above structure has the following advantages: ① The quantitative pipeline 51 serves as the quantitative standard, and the space between the transfer chamber 5 and the control valve 52 represents the total amount input in a single cycle, ensuring quantitative accuracy; ② The pushing force of the push rod 55 replaces the gravity of the lime itself as the conveying force for transporting lime to the lime spray gun 3. Since the pushing force of the push rod 55 is much greater than the air pressure force of the spray channel, it effectively reduces the influence of the air pressure in the spray channel, making the conveying rate more uniform and stable; ③ Excess lime entering the transfer chamber 5 will be temporarily stored in the transfer chamber 5 for the next spray, making full use of resources.

[0024] The conveying mechanism includes a conveying motor 41 fixed above the storage silo 2. A motor shaft 42 extending into the storage silo 2 is driven below the conveying motor 41. A feeding screw 43 located in the conveying pipe 4 is fixed at the lower end of the motor shaft 42. The conveying motor 41 and the feeding screw 43 are selected as the conveying mechanism. On the one hand, the lime can be conveyed to the transfer chamber 5 more accurately and quantitatively at the right time. On the other hand, it serves as a barrier between the transfer chamber 5 and the storage silo to prevent excessive lime from falling and hindering the movement of the push rod 55.

[0025] The conveying pipe 4 is located below the feeding screw 43 and has a redundant space 44 for storing lime. The end space of the conveying pipe 4 is used as a redundant space 44 to accommodate excess lime while ensuring that the lime can completely cover the push rod 55. This ensures that when the push rod 55 pushes the lime into the metering pipe 51, the lime can fill the metering pipe 51, thereby improving the input accuracy of the metering input mechanism.

[0026] A material hopper 21 is provided at the connection between the storage bin 2 and the conveying pipe 4 to gather lime into the feeding screw 43. The addition of the material hopper 21 makes the lime gather into the feeding screw 43, reducing the occurrence of lime not being filled in the threads of the feeding screw 43 and improving the feeding accuracy.

[0027] A vibrator 22 is installed on the outside of the storage silo 2. The addition of the vibrator 22 can solve the problems of bridging and rat holes, reduce storage problems such as adhesion and hanging of materials on the silo wall, and accelerate the flow of lime and optimize the material gathering effect of the material gathering hopper 21.

[0028] In addition, this device is equipped with a controller to control the coordinated operation of various electrical control components. The storage bin 2 is equipped with a replenishment cover 23 for replenishing lime, and it can also be directly transferred through a pneumatic transmission pipeline.

Claims

1. A lime injection device located in the rear arch of a waste incinerator, comprising a storage silo fixed to the furnace wall and a lime injection gun, wherein the storage silo is used to store lime, characterized in that: The lime spray guns are of two types and are activated alternately. The two lime spray guns are arranged in a V-shape and have the same spray range. The storage silo is equipped with a conveying pipe connected to the bottom of the storage silo and corresponding to each lime spray gun, as well as a conveying mechanism that conveys lime from top to bottom along the conveying pipe. The lower end of the conveying pipe is equipped with a quantitative input mechanism that gradually conveys a certain amount of lime to the lime spray gun, and a control mechanism that controls the quantitative input mechanism to connect or disconnect with the lime spray gun.

2. The lime injection device located in the rear arch of the waste incinerator according to claim 1, characterized in that: The quantitative input mechanism includes a transfer chamber connected to the lower end of the conveying pipe and located on the side of the lime spray gun. A quantitative pipe is connected between the transfer chamber and the lime spray gun. The control mechanism is a control valve located at the connection between the quantitative pipe and the lime spray gun. A retraction pipe is provided on the other side of the transfer chamber opposite to the quantitative pipe. A pusher cylinder is provided in the retraction pipe. The pusher cylinder drives a pusher rod that reciprocates between the retraction pipe, the transfer chamber, and the quantitative pipe. When the control valve is closed, the pusher rod moves from the retraction pipe to the connection between the quantitative pipe and the transfer chamber, pushing the quantitative lime into and sealing it in the quantitative pipe. When the control valve is open, the pusher rod continues to move towards the retraction pipe, gradually conveying the quantitative lime to the lime spray gun.

3. The lime injection device located in the rear arch of the waste incinerator according to claim 2, characterized in that: The conveying mechanism includes a conveying motor fixed above the storage silo, a motor shaft extending into the storage silo is driven below the conveying motor, and a feeding screw located in the conveying pipe is fixedly installed at the lower end of the motor shaft.

4. The lime injection device located in the rear arch of the waste incinerator according to claim 3, characterized in that: The conveying pipeline is located below the feeding screw and has redundant space for storing lime.

5. The lime injection device located in the rear arch of the waste incinerator according to claim 3, characterized in that: A material hopper is provided at the connection between the storage silo and the conveying pipeline to gather lime onto the feeding screw.

6. The lime injection device located in the rear arch of the waste incinerator according to claim 5, characterized in that: A vibrator is installed on the outside of the storage silo.

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