Multiple detection ash handling control system

Abstract

The utility model discloses a multiple detection ash conveying control system, including dust remover and ash conveying tank, and the ash conveying tank is connected with the feed valve between the hopper of dust remover, still install the discharge valve on the ash conveying tank, and the discharge valve is communicated to the ash storage bin through the ash conveying pipeline, and install the level detection device on the hopper, and the ash conveying signal detection device is arranged and installed on the ash conveying tank, and the discharge end of discharge valve is communicated to the high pressure gas tank through the air blow pipeline, and the air blow pipeline is installed with air blow valve group and pressure detection device in proper order, and the ash conveying pipeline is installed with discharge valve and discharge block valve in proper order, and the multiple detection signals of system are formed through each detection device and are transported to the ash conveying control device, and the start and control of ash conveying are carried out after the processing and analysis of ash conveying control device, realize the collection dust with high pressure gas and convey to the ash storage bin of long distance setting, and timely start discharge block valve to prevent the dust in the pipeline and block up, and the ash conveying efficiency is high and helps to avoid the secondary diffusion of dust.

Description

Technical Field

[0001] This utility model relates to the field of industrial dust control technology, and in particular to a multi-detection ash conveying control system. Background Technology

[0002] In large-scale production enterprises such as steel mills, coal plants, and cement plants, a large amount of dust is generated during the production process. To ensure environmentally friendly production, it is necessary to install supporting facilities such as dust collectors and ash removal systems. These facilities mainly include dust collectors, ash conveying tanks, and ash storage silos. Specifically, the gas carrying dust generated during the production process is first sent to the dust collector for separation. The separated and intercepted dust is collected in the ash conveying tank and then transferred to the ash storage silo for centralized treatment. However, the ash storage silo is generally far from the ash conveying tank and the dust collector, requiring manual labor or transport vehicles to transfer the dust to the ash storage silo in a timely manner. This process is inefficient and the dust is prone to secondary diffusion. Some systems utilize pneumatic conveying systems to transfer dust pneumatically, which overcomes the above shortcomings to some extent. However, when using pneumatic conveying systems for dust transfer, timed control of dust falling and discharging is currently commonly used. Moreover, the detection signals used in the dust removal control are singular, and the amount of dust removed cannot be estimated. The conveyed dust is prone to remain and accumulate in the pipeline at the end of the cleaning process, resulting in incomplete dust removal and affecting the smooth and efficient implementation of the next dust removal. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a multi-detection ash conveying control system with diversified detection signals, capable of estimating the amount of ash to be removed, and preventing the pipeline from being blocked by accumulated dust.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a multi-detection ash conveying control system, including a dust collector and an ash conveying hopper. A feed valve is connected between the ash conveying hopper and the discharge hopper of the dust collector. A discharge valve is also installed on the ash conveying hopper, which is connected to an ash storage silo via an ash conveying pipeline. A material level detection device is installed on the discharge hopper. An ash conveying signal detection device is installed on the ash conveying hopper. The discharge end of the discharge valve is also connected to a high-pressure air tank via an air blowing pipeline. An air blowing valve group and an air pressure detection device are sequentially installed on the air blowing pipeline. A discharge valve and a blockage removal valve are sequentially installed on the ash conveying pipeline. The system also includes an ash conveying control device. The material level detection device, the ash conveying signal detection device, and the air pressure detection device are respectively connected to the input terminal of the ash conveying control device. The feed valve, the discharge valve, the discharge valve, the air blowing valve group, and the blockage removal valve are respectively connected to the control terminal of the ash conveying control device.

[0005] As a preferred technical solution, the ash conveying pipeline is also connected to an auxiliary blowing pipeline connected to a high-pressure air source, and an auxiliary blowing valve group is installed on the auxiliary blowing pipeline, which is connected to the control terminal of the ash conveying control device.

[0006] As a preferred technical solution, the material level detection device includes a low material level gauge and a high material level gauge fixedly installed on the hopper, with the high material level gauge located above the low material level gauge, and the low material level gauge and the high material level gauge respectively connected to the ash conveying control device.

[0007] As a preferred technical solution, the ash conveying signal detection device includes an ash conveying level gauge fixedly installed on the ash conveying tank, a first pressure transmitter for detecting the ash pressure in the ash conveying tank, and a weighing sensor for detecting the weight of the ash in the ash conveying tank. The ash conveying level gauge, the first pressure transmitter, and the weighing sensor are respectively connected to the ash conveying control device.

[0008] As a preferred technical solution, the air pressure detection device includes a second pressure transmitter installed on the air blowing pipeline, and the second pressure transmitter signal is connected to the ash conveying control device.

[0009] As a preferred technical solution, the ash conveying control device includes a PLC controller located at the ash conveying site.

[0010] As an improvement to the above technical solution, the ash conveying control device also includes a remote host computer, whose signals are connected to the PLC controller.

[0011] Due to the adoption of the above technical solution, this utility model has the following beneficial effects: the material level detection device, the ash conveying signal detection device, and the air pressure detection device form multiple detection signals of the system and transmit them to the ash conveying control device. After processing and analysis by the ash conveying control device, the ash conveying is started and controlled, that is, the corresponding valves and air passages are opened to realize the use of high-pressure gas to transport the collected dust to the ash storage bin set at a distance. The anti-blocking valve is activated in a timely manner to prevent dust from accumulating in the pipeline and causing blockage, thus ensuring the smooth flow of the ash conveying pipeline. The dust conveying efficiency driven by the high-pressure air source is high and helps to avoid secondary diffusion of dust. Attached Figure Description

[0012] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein: Figure 1 This is a structural block diagram of an embodiment of the present utility model; Figure 2 This is a simplified structural diagram of an embodiment of the present utility model; In the diagram: 1-Dust collector; 2-Ash conveying hopper; 3-Feeding hopper; 4-Infeed valve; 5-Discharge valve; 6-Ash conveying pipeline; 7-Ash storage silo; 8-Air blowing pipeline; 9-High-pressure air tank; 10-Air blowing valve assembly; 11-Discharge valve; 12-Blocking valve; 13-PLC controller; 14-Low level gauge; 15-High level gauge; 16-Ash conveying level gauge; 17-First pressure transmitter; 18-Weighing sensor; 19-Second pressure transmitter; 20-Auxiliary blowing pipeline; 21-Auxiliary blowing valve assembly. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0014] like Figure 1 and Figure 2 As shown, a multi-detection ash conveying control system is used to automatically clean the system in a timely manner based on detection signals, and centrally store the separated and intercepted dust for unified processing. Specifically, it includes a dust collector 1 and an ash conveying tank 2. An inlet valve 4 connects the ash conveying tank 2 to the discharge hopper 3 of the dust collector 1. An outlet valve 5 is also installed on the ash conveying tank 2, and the outlet valve 5 is connected to the ash storage silo 7 via an ash conveying pipeline 6. The dust-laden gas generated during production is sent into the dust collector 1 for separation. The intercepted dust is first temporarily stored in the ash conveying tank 2, and then the outlet valve 5 is activated in a timely manner to transport it to the remotely located ash storage silo 7 via the ash conveying pipeline 6. Conventional structures such as compensators are also installed between the inlet valve 4 and the discharge hopper 3, and between the ash conveying tank 2 and the outlet valve 5, which will not be described in detail here.

[0015] The feeding hopper 3 is equipped with a material level detection device, the ash conveying tank 2 is equipped with an ash conveying signal detection device, the discharge end of the discharge valve 5 is also connected to the high-pressure air tank 9 through the air blowing pipeline 8, the air blowing pipeline 8 is equipped with an air blowing valve group 10 and an air pressure detection device in sequence, the ash conveying pipeline 6 is equipped with a discharge valve 11 and a blockage relief valve 12 in sequence, and also includes an ash conveying control device. The material level detection device, the ash conveying signal detection device and the air pressure detection device are respectively connected to the input end of the ash conveying control device, and the feeding valve 4, the discharge valve 5, the discharge valve 11, the air blowing valve group 10 and the blockage relief valve 12 are respectively connected to the control end of the ash conveying control device. The material level detection device, the ash conveying signal detection device, and the air pressure detection device can obtain various types of detection signals, which are then transmitted to the ash conveying control device for analysis and processing. Based on the processing results, the control device can activate corresponding valves and air circuits in a timely manner to transport the collected dust to the ash storage silo 7 located at a distance using high-pressure gas. It can also activate the drain valve 12 in a timely manner to discharge accumulated ash from the pipeline, preventing dust accumulation and blockage, and ensuring the smooth flow of the ash conveying pipeline 6. The amount of ash discharged by the drain valve 12 is small and can be temporarily stored separately. In actual use, a small dust collector is separately connected to the top of the ash storage silo 7 for separating and discharging the gas during pneumatic conveying.

[0016] The ash conveying control device includes a PLC controller 13 located at the ash conveying site and a remote host computer connected to the PLC controller 13. The PLC controller 13 receives detection signals from various monitoring devices and controls the opening and closing of corresponding valves or valve groups to achieve automatic ash conveying. The detection information and control information obtained by the PLC controller 13 can be transmitted to the remote host computer in a timely manner. The host computer can remotely monitor the ash conveying status, the amount of ash in the discharge hopper 3 and the ash conveying tank 2, and store historical data for future reference.

[0017] The material level detection device includes a low-level gauge 14 and a high-level gauge 15 fixedly installed on the hopper 3. The high-level gauge 15 is located above the low-level gauge 14. The low-level gauge 14 and the high-level gauge 15 are respectively connected to the ash conveying control device. The high-level gauge 15 and the low-level gauge 14 work together to detect the upper and lower limits of the ash accumulation in the hopper 3 and transmit the data to the PLC controller 13 for control or monitoring.

[0018] The ash conveying signal detection device includes an ash level gauge 16 fixedly installed on the ash conveying tank 2, a first pressure transmitter 17 for detecting the ash pressure in the ash conveying tank 2, and a weighing sensor 18 for detecting the weight of the ash in the ash conveying tank 2. The ash level gauge 16, the first pressure transmitter 17, and the weighing sensor 18 are respectively connected to the ash conveying control device. The ash level gauge 16 is used to detect the ash level in the ash conveying tank 2, and in conjunction with the pressure signal of the ash conveying tank 2 obtained by the first pressure transmitter 17 and the ash weight signal obtained by the weighing sensor 18, the PLC controller 13 is used to control the opening and closing of the feed valve 4 and the discharge valve 5.

[0019] The air pressure detection device includes a second pressure transmitter 19 installed on the air blowing pipeline 8, and the second pressure transmitter 19 is connected to the PLC controller 13. The second pressure transmitter 19, in conjunction with the PLC controller 13, controls the safe operation of the air circuit. In this embodiment, the ash conveying pipeline 6 is also connected to an auxiliary blowing pipeline 20 connected to a high-pressure air source. An auxiliary blowing valve assembly 21 is installed on the auxiliary blowing pipeline 20, and the auxiliary blowing valve assembly 21 is connected to the control terminal of the PLC controller 13 to assist the air blowing pipeline 8, ensuring smooth ash conveying.

[0020] The PLC controller 13 has standard values ​​corresponding to the high level gauge 15, the low level gauge 14, the ash conveying level gauge 16, the first pressure transmitter 17, and the weighing sensor 18. At the same time, the PLC controller 13 also stores the standard value and lower limit value corresponding to the second pressure transmitter 19, which are used to control and adjust the high-pressure air circuit. Furthermore, the host computer can adjust the above standard values ​​for different usage scenarios.

[0021] In this embodiment, the high-level point (i.e., its corresponding standard value) detected by the high-level gauge 15 is used as the trigger signal for starting ash conveying. After receiving this signal, the PLC controller 13 controls the feed valve 4 to open. After the detection values ​​of the low-level gauge 14, the ash conveying level gauge 16, the first pressure transmitter 17, or the weighing sensor 18 reach the standard value, the PLC controller 13 controls the feed valve 4 to close and opens the discharge valve 5 and the air blowing valve group 10. The second pressure transmitter 19 detects the air pressure of the air blowing pipeline 8. When the pressure of the air blowing pipeline 8 reaches the standard value of the second pressure transmitter 19, the discharge valve 11 is opened to start ash conveying. During the discharge process, the discharge valve 11 can be automatically opened in a timely manner according to the pressure change of the air blowing pipeline 8. The auxiliary blowing valve group 21 or the anti-blocking valve 12 provides assistance (if the pressure of the air blowing pipeline 8 exceeds the standard value of the second pressure transmitter 19, it indicates that the ash conveying pipeline 6 is blocked, and the anti-blocking valve 12 needs to be opened; or if the power for ash conveying using only the air blowing pipeline 8 is insufficient, the auxiliary blowing pipeline 20 needs to be opened for assistance). When the ash conveying level gauge 16, the first pressure transmitter 17, or the weighing sensor 18 has no detection value, or when the detection signal of the first pressure transmitter 17 is the lower limit value (the empty pipe pressure value), the PLC controller 13 sequentially closes the discharge valve 5, the air blowing valve group 10 (if applicable, closes the auxiliary blowing valve group 21 and the anti-blocking valve 12), and the discharge valve 11, and waits for the next ash conveying start signal. Multiple detection methods for ash conveying control increase the reliability of ash conveying and avoid the impact of uncertainties such as signal instability under a single detection mode.

[0022] The description of this utility model is given for illustrative and descriptive purposes only, and is not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the utility model, and to enable those skilled in the art to understand the utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A multi-detection ash conveying control system, comprising a dust collector and an ash conveying hopper, wherein an inlet valve is connected between the ash conveying hopper and the discharge hopper of the dust collector, and an outlet valve is also installed on the ash conveying hopper, the outlet valve being connected to an ash storage silo via an ash conveying pipeline, characterized in that: The hopper is equipped with a material level detection device, the ash conveying hopper is equipped with an ash conveying signal detection device, the discharge end of the discharge valve is connected to a high-pressure air tank through an air blowing pipeline, an air blowing valve group and an air pressure detection device are installed in sequence on the air blowing pipeline, a discharge valve and a blockage relief valve are installed in sequence on the ash conveying pipeline, and an ash conveying control device is also included. The material level detection device, the ash conveying signal detection device and the air pressure detection device are respectively connected to the input end of the ash conveying control device, and the feed valve, the discharge valve, the discharge valve group and the blockage relief valve are respectively connected to the control end of the ash conveying control device.

2. The multi-detection ash conveying control system as described in claim 1, characterized in that: The ash conveying pipeline is also connected to an auxiliary blowing pipeline connected to a high-pressure air source. An auxiliary blowing valve group is installed on the auxiliary blowing pipeline and is connected to the control terminal of the ash conveying control device.

3. The multi-detection ash conveying control system as described in claim 1, characterized in that: The material level detection device includes a low material level gauge and a high material level gauge fixedly installed on the hopper. The high material level gauge is located above the low material level gauge, and the low material level gauge and the high material level gauge are respectively connected to the ash conveying control device.

4. The multi-detection ash conveying control system as described in claim 1, characterized in that: The ash conveying signal detection device includes an ash level gauge fixedly installed on the ash conveying hopper, a first pressure transmitter for detecting the ash pressure in the ash conveying hopper, and a weighing sensor for detecting the weight of the ash in the ash conveying hopper. The ash level gauge, the first pressure transmitter, and the weighing sensor are respectively connected to the ash conveying control device.

5. The multi-detection ash conveying control system as described in claim 1, characterized in that: The air pressure detection device includes a second pressure transmitter installed on the air blowing pipeline, and the second pressure transmitter is connected to the ash conveying control device.

6. The multi-detection ash conveying control system as described in any one of claims 1 to 5, characterized in that: The ash conveying control device includes a PLC controller located at the ash conveying site.

7. The multi-detection ash conveying control system as described in claim 6, characterized in that: The ash conveying control device also includes a remote host computer, whose signals are connected to the PLC controller.

Images