A stable coal mill wind temperature drop heat consumption equipment

Abstract

The utility model discloses a kind of stable coal mill wind temperature reduction heat consumption equipment, it is related to novel dry cement water clinker firing technical field, including dust collection equipment, first air inlet pipeline and second air inlet pipeline, the dust collection equipment is provided with feed inlet and discharge port;First air inlet pipeline is connected with the dust collection equipment through feed inlet;Second air inlet pipeline is connected with the dust collection equipment through feed inlet;The first air inlet pipeline is connected with the first wind area of grate cooler at the end far from the dust collection equipment;Second air inlet pipeline is connected with the second wind area of the grate cooler at the end far from the dust collection equipment, can solve the problem that fine powder clinker cannot be efficiently separated due to uneven wind mixing in prior art.

Description

Technical Field

[0001] This utility model relates to the field of new dry-process cement clinker calcination technology, and in particular to a device for stabilizing coal mill air temperature and reducing heat consumption. Background Technology

[0002] During the research and application of this method, it was found that a stable hot air supply and reduced moisture content in the pulverized coal preparation system are key to stable clinker calcination. However, finding a suitable and effective energy-saving and hot air stability method is not easy. A mature design involves taking hot air from the front end of the grate cooler and mixing it with external cold air to achieve a suitable air temperature before entering the mill. Production practice has confirmed that mixing externally taken cold air with hot air directly affects the stability and safe operation of the hot air. Uneven mixing of warm and cold air leads to significant air turbulence, low utilization rate of exhaust gas at the kiln head, and the entry of fine powder hot clinker into the mill poses certain risks to the safe operation of the mill. At the same time, the energy consumption of kiln head exhaust is high. Therefore, it is necessary to change the air intake point, mixing method, and collection of fine powder clinker within the hot air.

[0003] The original method involved taking in high-temperature air and then mixing it with external cold air for cooling before it entered the mill. This resulted in uneven mixing of high and low temperature air, significant air turbulence, low utilization rate of exhaust gas from the kiln head, safety hazards when fine powder hot clinker entered the mill, and certain risks to the safe operation of the mill. At the same time, the energy consumption of exhaust gas from the kiln head was high.

[0004] This technology changes the air intake point, mixing method, and collection of fine powder clinker in the hot air, solving problems such as uneven mixing of warm air, turbulent air flow, low utilization rate of exhaust gas at the kiln head, and risks to the safe operation of the mill due to the entry of fine powder hot clinker into the mill, while also addressing the issue of high energy consumption in the kiln head exhaust. Utility Model Content

[0005] This invention provides a device for stabilizing coal mill air temperature and reducing heat consumption, which can solve the problem in the prior art where uneven air mixing leads to the inability to efficiently separate fine clinker.

[0006] To address the above problems, this utility model provides a device for stabilizing coal mill air temperature and reducing heat consumption, comprising:

[0007] A vacuum cleaner, wherein the vacuum cleaner is provided with an inlet and an outlet;

[0008] The first air intake pipe is connected to the dust collection equipment through the feed inlet;

[0009] The second air intake pipe is connected to the dust collection equipment through the feed inlet;

[0010] The end of the first air intake pipe furthest from the dust collection device is connected to the first air zone of the grate cooler;

[0011] The end of the second air intake pipe furthest from the dust collection device is connected to the second air zone of the grate cooler.

[0012] Preferably, a first intake regulating valve is provided in the first intake pipe, and the first intake regulating valve connects or disconnects the first intake pipe;

[0013] A second intake regulating valve is provided in the second intake pipe, and the second intake regulating valve connects and disconnects the second intake pipe.

[0014] Preferably, the first wind zone is a low-temperature wind zone, and the temperature of the low-temperature wind zone is between 200℃ and 300℃.

[0015] Preferably, the second wind zone is a high-temperature wind zone, and the temperature of the high-temperature wind zone is 1000℃.

[0016] Preferably, the dust collection device is configured as a cyclone dust collector.

[0017] Preferably, the dust collection device is connected to the discharge port of the dust collection device, which is used to collect the separated solid particles.

[0018] Preferably, an airflow distributor is provided at the connection between the first air intake pipe and the second air intake pipe and the vacuum cleaner, the airflow distributor being used to fully mix the two airflows.

[0019] Preferably, it further includes a control unit, which is connected to the first intake regulating valve and the second intake regulating valve.

[0020] Preferably, it further includes a temperature detection device, which is disposed at the air outlet of the dust collection equipment or on the first air inlet pipe or the second air inlet pipe, and the temperature detection device is used to detect the temperature of the mixed gas or the air inlet temperature.

[0021] Preferably, a flow meter is provided on the first air intake pipe and / or the second air intake pipe, and the flow meter is used to monitor the gas flow rate entering the dust collection device.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] 1. In this application, the first air inlet pipe is connected to the first air zone of the grate cooler, and the second air inlet pipe is connected to the second air zone of the grate cooler, so that the air in the first air zone of the grate cooler and the air in the second air zone are mixed and enter the dust collection equipment through the feed port, so that the dust collection equipment can efficiently separate the fine powder clinker in the first air zone and the second air zone.

[0024] 2. By taking air from different temperature zones of the grate cooler and using a perforated plate airflow distributor to achieve uniform mixing of high and low temperature gases, the problem of large temperature fluctuations and uneven mixing in traditional systems is effectively solved, and the utilization efficiency of waste heat from the kiln head is significantly improved.

[0025] 3. The system employs a high-precision intake regulating valve and an intelligent control unit to work together, which can monitor and dynamically adjust the intake air ratio and flow rate in real time, ensuring stable and controllable mixed air temperature, avoiding local high temperature or airflow turbulence, and ensuring continuous and stable operation of the system. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of a device for stabilizing coal mill air temperature and reducing heat consumption according to an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of a device for stabilizing coal mill air temperature and reducing heat consumption according to an embodiment of the present invention.

[0029] Figure 3 This is a schematic diagram of a device for stabilizing coal mill air temperature and reducing heat consumption according to an embodiment of the present invention.

[0030] Figure 4 This is a schematic diagram of a device for stabilizing coal mill air temperature and reducing heat consumption according to an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 100. Dust collection equipment; 110. Feed inlet; 120. Discharge outlet; 130. Dust collection device; 140. Air outlet; 200. First air inlet pipe; 210. First air inlet regulating valve; 300. Second air inlet pipe; 310. Second air inlet regulating valve; 400. Airflow distributor; 500. Control unit; 600. Temperature detection device; 700. Flow meter. Detailed Implementation

[0033] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0034] like Figure 1As shown in the figure, the present invention provides a device for stabilizing coal mill air temperature and reducing heat consumption, including a dust collection device 100. The dust collection device 100 is connected to a first air inlet pipe 200 and a second air inlet pipe 300. Both the first air inlet pipe and the second air inlet pipe are connected to a grate cooler. The temperature difference between different air zones of the grate cooler can be used to mix gases of different temperatures. Specifically, the vacuum cleaner 100 is equipped with an inlet 110 and an outlet 140. A first air intake pipe 200 is connected to the inlet 110 of the vacuum cleaner 100, and one end of the first air intake pipe 200 is away from the vacuum cleaner 100 and connected to the first air zone of the grate cooler. A second air intake pipe 300 is connected to the inlet 110 of the vacuum cleaner 100. The outlet 140 discharges the mixed gas in the vacuum cleaner 100. The end of the second air intake pipe 300 away from the vacuum cleaner 100 is connected to the second air zone of the grate cooler. The temperature of the first air zone is lower than that of the second air zone. This differentiated air intake design can make full use of the temperature gradient naturally formed inside the grate cooler to achieve optimized configuration and reasonable allocation of hot air resources.

[0035] In this embodiment, the first wind zone is a low-temperature wind zone with a temperature of 200℃-300℃; the second wind zone is a high-temperature wind zone with a temperature of 1000℃.

[0036] The first and second air inlets share a common pipe when connected to the vacuum cleaner 100, which facilitates the mixing of low-temperature air from the low-temperature zone and high-temperature air from the high-temperature zone before they enter the vacuum cleaner 100.

[0037] Regarding pipeline control, a first intake regulating valve 210 is carefully installed in the first intake pipeline 200, which can control the connection and disconnection of the first intake pipeline 200. Similarly, a second intake regulating valve 310 is installed in the second intake pipeline 300, which can control the connection and disconnection of the second intake pipeline 300. Furthermore, both regulating valves employ high-precision control elements. By precisely adjusting their opening and closing degrees and on / off states, the gas flow parameters entering the dust collection equipment 100 can be flexibly controlled, ensuring the stability and controllability of the system operation.

[0038] The dust collection equipment 100 preferably employs a high-efficiency cyclone dust collector, which utilizes an internal cyclone separation structure, enabling it to separate solid particles carried in the gas with an efficiency of over 95%. This design not only significantly reduces the risk of wear and tear on subsequent equipment but also effectively avoids operational problems such as pipe blockage. At the bottom of the cyclone dust collector, a dedicated discharge port 120 is provided and connected to a sealed dust collection device 130. The discharge port 120 is used to discharge solid particles. This device features a leak-proof design, ensuring safe and reliable collection of the separated solid particles, facilitating subsequent unified processing and resource recycling.

[0039] To ensure effective airflow mixing, a perforated plate-type airflow distributor 400 is specially installed at the connection between the first air intake pipe 200, the second air intake pipe 300, and the vacuum cleaner 100. Figure 2 As shown, the distributor adopts a flow guiding structure, which enables two airflows from different air zones to be fully mixed, forming a mixed airflow with uniform temperature and stable flow rate before entering the dust collection equipment 100, thereby avoiding local high temperature or airflow turbulence.

[0040] In this embodiment, the system is also equipped with an intelligent control unit 500, which is electrically connected to the first intake regulating valve 210 and the second intake regulating valve 310 via signal lines. The control algorithm built into the control unit 500 can receive signals from the temperature detection device 600 in real time and automatically adjust the opening ratio of the two regulating valves accordingly to achieve precise control and dynamic balance of air temperature.

[0041] Furthermore, this embodiment of the application also includes a temperature detection device 600, such as... Figure 3 As shown, the temperature detection device 600 adopts a multi-point arrangement, including a main temperature sensor installed at the air outlet 140 of the vacuum cleaner 100, and auxiliary temperature probes respectively installed on the first air intake pipe 200 and the second air intake pipe 300. These temperature detection devices 600 use high-precision thermocouples, which can accurately measure the temperature of the mixed gas or the intake air temperature, providing reliable data support for the control unit 500.

[0042] The temperature detection device 600 is connected to the control unit 500 so that the control unit 500 can control the first intake regulating valve 210 and the second intake regulating valve 310 through the temperature detection device 600.

[0043] To further improve the system monitoring function, high-precision flow meters 700 were also installed on the first intake pipe 200 and the second intake pipe 300, such as... Figure 4 As shown, these flow meters 700 use electromagnetic or ultrasonic measurement principles to monitor the gas flow rate entering the dust collection equipment 100 in real time, ensuring that the equipment always operates within the optimal flow range, thereby significantly improving the stability and operational reliability of the system.

[0044] Compared with existing technologies, the innovative advantages of this utility model are mainly reflected in the following aspects:

[0045] First, by scientifically selecting the air intake point and optimizing the mixing method, the technical problems such as uneven mixing of warm air and obvious wind turbulence in traditional systems have been completely solved.

[0046] Secondly, the system significantly improves the utilization efficiency of kiln head exhaust gas, with actual measurements showing that the thermal energy utilization rate is increased by more than 30%.

[0047] Furthermore, by efficiently collecting the fine clinker from the hot air, the safety hazards caused by the entry of fine hot clinker into the mill are effectively reduced, providing a reliable guarantee for the long-term safe operation of the mill.

[0048] Finally, the overall system design significantly reduces the energy consumption of kiln head exhaust. Actual operation tests show that the energy efficiency of the entire pulverized coal preparation system can be improved by 15% to 20% compared with traditional processes, demonstrating significant economic benefits and environmental value.

[0049] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A device for stabilizing coal mill air temperature and reducing heat consumption, characterized in that, include: A vacuum cleaner (100) is provided with an inlet (110) and an outlet (120); The first air intake pipe (200) is connected to the dust collection device (100) through the feed port (110); The second air intake pipe (300) is connected to the dust collection device (100) through the feed port (110); The end of the first air intake pipe (200) away from the dust collection device (100) is connected to the first air zone of the grate cooler; The end of the second air intake pipe (300) away from the dust collection device (100) is connected to the second air zone of the grate cooler.

2. The equipment for stabilizing coal mill air temperature and reducing heat consumption according to claim 1, characterized in that, A first intake regulating valve (210) is provided in the first intake pipe (200), and the first intake regulating valve (210) connects and disconnects the first intake pipe (200); A second intake regulating valve (310) is provided in the second intake pipe (300), and the second intake regulating valve (310) connects and disconnects the second intake pipe (300).

3. The equipment for stabilizing coal mill air temperature and reducing heat consumption according to claim 2, characterized in that, The first wind zone is a low-temperature wind zone, with a temperature between 200℃ and 300℃.

4. The equipment for stabilizing coal mill air temperature and reducing heat consumption according to claim 3, characterized in that, The second wind zone is a high-temperature wind zone, with a temperature of 1000℃.

5. The equipment for stabilizing coal mill air temperature and reducing heat consumption according to claim 1, characterized in that, The dust collection device (100) is configured as a cyclone dust collector.

6. The equipment for stabilizing coal mill air temperature and reducing heat consumption according to claim 1, characterized in that, The dust collection device (100) has a dust collection device (130) connected to its discharge port (120), which is used to collect the separated solid particles.

7. The equipment for stabilizing coal mill air temperature and reducing heat consumption according to claim 1, characterized in that, An airflow distributor (400) is provided at the connection between the first air intake pipe (200) and the second air intake pipe (300) and the vacuum cleaner (100). The airflow distributor (400) is used to fully mix the two airflows.

8. The equipment for stabilizing coal mill air temperature and reducing heat consumption according to claim 2, characterized in that, It also includes a control unit (500) that is connected to the first intake regulating valve (210) and the second intake regulating valve (310).

9. The equipment for stabilizing coal mill air temperature and reducing heat consumption according to claim 1, characterized in that, It also includes a temperature detection device (600), which is installed at the air outlet of the vacuum cleaner (100) or on the first air inlet pipe (200) or the second air inlet pipe (300). The temperature detection device (600) is used to detect the temperature of the mixed gas or the air inlet temperature.

10. The equipment for stabilizing coal mill air temperature and reducing heat consumption according to claim 1, characterized in that, A flow meter (700) is provided on the first air intake pipe (200) and / or the second air intake pipe (300), and the flow meter (700) is used to monitor the gas flow rate entering the vacuuming device (100).

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