Vertical drying kiln production control device

Abstract

The utility model relates to a material production control device, in particular to a vertical drying kiln production control device which comprises a vertical dryer, a material conveying assembly is arranged at the upper end of the vertical dryer, and a material output assembly is arranged at the output end of the vertical dryer. The hot air output end of the fluidized bed furnace is communicated with the vertical dryer through a hot air inlet header pipe and a plurality of air inlet branch pipes in sequence, and the vertical dryer is further connected with a tail gas treatment assembly; and the output end of the nitrogen supply assembly is communicated with the vertical dryer. According to the utility model, automatic safety control is facilitated, and the labor intensity of operators is reduced.

Description

Technical Field

[0001] This utility model relates to a material production control device, and more particularly to a vertical drying kiln production control device. Background Technology

[0002] Calcium carbide (calcium carbide) is an important chemical raw material widely used in industry, mainly for the production of acetylene, calcium hydroxide, etc. In the production process of calcium carbide, the pretreatment of raw materials is crucial, especially the drying process of the carbon material, which directly affects the quality and yield of the product.

[0003] Traditional drying processes suffer from high energy consumption, low efficiency, and long production cycles, hindering the overall profitability of calcium carbide production. The main problems currently existing include:

[0004] 1. The temperature control system of traditional drying equipment often lacks automation, resulting in large temperature fluctuations during the drying process;

[0005] 2. Improper temperature control during the material drying process may cause the material to ignite at high temperatures, posing a significant safety hazard.

[0006] 3. Traditional drying processes require a long drying time, and uneven temperature can lead to incomplete drying of materials, or even damage or deterioration, affecting product quality, resulting in low efficiency, extended production cycles, and increased energy consumption and production costs.

[0007] 4. Many traditional processes require manual adjustment of drying parameters, which involves cumbersome operation steps, is prone to human error, and increases management difficulty and labor intensity;

[0008] 5. Traditional drying processes often generate a lot of waste gas, waste heat and noise pollution, which has a negative impact on the production environment and the surrounding ecology and may not meet the requirements of environmental protection regulations.

[0009] Therefore, those skilled in the art are dedicated to developing a production control device for vertical drying kilns that facilitates automatic safety control and reduces the labor intensity of operators. Utility Model Content

[0010] The technical problem to be solved by this utility model is to provide a production control device for a vertical drying kiln, which facilitates automatic and safe control and reduces the labor intensity of operators.

[0011] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0012] A vertical drying kiln production control device, including

[0013] A vertical dryer, wherein a material conveying component is provided at the upper end of the vertical dryer and a material output component is provided at the output end of the vertical dryer;

[0014] The fluidized bed furnace has its hot gas output end connected to the vertical dryer via a hot air inlet main pipe and multiple inlet branch pipes, and the vertical dryer is also connected to an exhaust gas treatment component.

[0015] A nitrogen supply component, the output of which is connected to the vertical dryer.

[0016] The beneficial effects of adopting the above scheme are: the material conveying component is used to continuously feed the material to be dried into the vertical dryer, the fluidized bed furnace is used to provide hot air to the vertical dryer for removing moisture, and the nitrogen supply component is used to supplement nitrogen into the vertical dryer as required, which can effectively reduce the oxygen concentration during the drying process, reduce the risk of material ignition at high temperature, and the nitrogen supply component is also used to balance the drying temperature in the vertical dryer.

[0017] Based on the above technical solution, the present invention can be further improved as follows.

[0018] Furthermore, the material conveying assembly includes a kiln front silo, the output end of which is equipped with a weighing belt, and the output end of which is equipped with a large-angle belt, the output end of which is located at the upper end of the vertical dryer.

[0019] The beneficial effects of adopting the above-mentioned further scheme are: by combining the kiln front silo, weighing belt and large-angle belt, the material can be accurately metered and stably conveyed, ensuring that the amount of material entering the vertical dryer meets the drying process requirements and improving the stability of the drying effect.

[0020] Furthermore, the fluidized bed furnace is connected to a denitrification silo via a denitrification agent spray gun pipe, and a denitrification feeder is also installed between the denitrification agent spray gun pipe and the denitrification silo;

[0021] The fluidized bed furnace is connected to a fuel silo via a fuel pipe, and a coal feeder is installed on the fuel pipe.

[0022] The beneficial effects of adopting the above-mentioned further solution are: by connecting the denitrification agent spray gun pipeline to the denitrification material silo and installing the denitrification feeder, the amount of denitrification agent added can be precisely controlled, effectively reducing the emission of nitrogen oxides during the combustion process of the fluidized bed furnace, which meets environmental protection requirements;

[0023] The fuel pipe is connected to the fuel silo and a coal feeder is installed to ensure a stable fuel supply, guarantee continuous and stable combustion in the fluidized bed furnace, improve the uniformity and stability of hot air temperature, and facilitate uniform drying of materials.

[0024] Furthermore, the fluidized bed furnace is connected to a blower and is equipped with a fire-watching furnace door, a fluidized bed furnace mixing valve, and a slag discharge port.

[0025] The beneficial effects of adopting the above-mentioned further solutions are: the blower provides sufficient air to the fluidized bed furnace, promotes complete combustion of fuel, improves thermal efficiency, and the furnace door makes it easier for operators to observe the combustion situation inside the furnace and adjust the combustion parameters in a timely manner.

[0026] Furthermore, the lower end of the vertical dryer is conical, and the upper end of the vertical dryer has a buffer chamber, with a fabric spreader installed at the output end of the buffer chamber.

[0027] The beneficial effects of adopting the above-mentioned further solutions are: the buffer bin and the material distributor can buffer and evenly distribute the material entering the dryer, so that the material forms a uniform material layer in the dryer, thereby further improving the drying effect.

[0028] Furthermore, the nitrogen supply assembly includes a nitrogen pipeline connected to the nitrogen supply assembly. The other end of the nitrogen pipeline is connected to a first branch pipe and a second branch pipe. The first branch pipe is connected to the middle of the vertical dryer, and the second branch pipe is connected to the lower end of the vertical dryer. A nitrogen valve for the first layer of the kiln body and a nitrogen valve for the conical part of the kiln body are respectively installed on the first branch pipe and the second branch pipe.

[0029] The beneficial effects of adopting the above-mentioned further solution are: the nitrogen supply component is connected through a nitrogen pipeline, and the first branch pipe and the second branch pipe are respectively connected to the middle and lower end of the vertical dryer, so that the nitrogen flow rate can be flexibly adjusted according to the oxygen concentration requirements at different locations, ensuring the safety of the drying process.

[0030] Furthermore, the material output component includes an electro-hydraulic push rod installed at the output end of the vertical dryer. An opening baffle is installed at the output end of the electro-hydraulic push rod. A slide gate valve and a discharge vibrating feeder are also installed at the output end of the vertical dryer. An emergency discharge pipe and a discharge pipe are installed at the output end of the discharge vibrating feeder. A discharge three-way pneumatic valve is installed on the emergency discharge pipe. A discharge three-way valve is installed on the discharge pipe. An emergency discharge belt is provided at the output end of the emergency discharge pipe. A finished product discharge belt is provided at the output end of the finished product discharge belt. A finished product bin is also provided at the bottom of the finished product bin. A vibrating feeder is also installed at the bottom of the finished product bin.

[0031] The beneficial effects of adopting the above-mentioned further solutions are: in emergency situations such as equipment failure, fire, or excessively high temperature, the emergency discharge pipe and emergency discharge belt can quickly discharge materials, reducing losses caused by production accidents; the setting of finished product discharge belt and finished product silo facilitates the collection and transfer of finished product materials, improving production efficiency.

[0032] Furthermore, the exhaust gas treatment component includes a dust removal air inlet branch pipe connected to the fluidized bed furnace. The output end of the dust removal air inlet branch pipe is sequentially connected to a dust removal air inlet main pipe and a dust collector. The dust removal output end of the dust collector is also connected to a dust removal ash silo pump and a pneumatic conveying ash pipeline.

[0033] The beneficial effects of adopting the above-mentioned further solution are: by connecting the dust removal air inlet branch pipe, the dust removal air inlet main pipe and the dust collector, the dust generated during the drying process can be effectively collected and treated, reducing the pollution of the environment by dust emissions and meeting environmental protection standards.

[0034] Furthermore, the dust collector's gas output end is connected in sequence to an induced draft fan and a waste gas venting chimney. A blind plate is installed on the waste gas venting chimney. The waste gas venting chimney is connected to the flue gas inlet through an exhaust pipe. The flue gas inlet is installed on the desulfurization tower. The exhaust end of the desulfurization tower is also equipped with a tail gas chimney and a tail gas detection component.

[0035] The beneficial effects of adopting the above-mentioned further solutions are: the induced draft fan and exhaust gas venting chimney ensure the smooth discharge of exhaust gas, and the exhaust gas is introduced into the desulfurization tower through the exhaust pipe for further desulfurization treatment, reducing the emission of harmful gases such as sulfur dioxide; the setting of exhaust gas chimney and exhaust gas detection components facilitates the monitoring and emission of treated exhaust gas, ensuring that the exhaust gas meets emission standards, and further improving environmental protection performance.

[0036] Furthermore, multiple air distribution valves are also installed on the hot air inlet main pipe.

[0037] The beneficial effects of adopting the above-mentioned further solution are: multiple air distribution valves are installed on the hot air inlet main pipe, which can flexibly adjust the air volume of each air inlet branch pipe according to the hot air demand of different areas in the vertical dryer, so as to achieve reasonable distribution of hot air and improve the thermal efficiency and uniformity of drying quality in the drying process. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of a vertical drying kiln production control device according to a specific embodiment of the present invention.

[0039] The attached diagram lists the components represented by each number as follows:

[0040] 1. Denitrification silo; 2. Denitrification feeder; 3. Denitrification agent spray gun pipeline; 4. Fuel silo; 5. Coal feeder; 6. Fluidized bed furnace; 7. Inspection furnace door; 8. Blower; 9. Fluidized bed furnace mixing valve; 10. Slag discharge port; 11. Hot air inlet main pipe; 12. Inlet branch pipe; 13. Vertical dryer; 14. Air distribution valve; 15. Nitrogen pipeline; 16. First layer nitrogen valve of kiln body; 17. Nitrogen valve of kiln body cone; 18. Electro-hydraulic push rod; 19. Slide valve; 20. Discharge vibrating feeder; 21. Discharge three-way pneumatic valve; 22. Discharge three-way... 23. Emergency discharge belt; 24. Finished product discharge belt; 25. Finished product silo; 26. Vibrating feeder; 27. Kiln front silo; 28. Weighing belt; 29. ​​Large angle belt; 30. Distributor; 31. Buffer silo; 32. Dust removal air inlet branch pipe; 33. Dust removal air inlet main pipe; 34. Dust collector; 35. Dust removal ash silo pump; 36. Pneumatic conveying ash pipeline; 37. Exhaust fan; 38. Exhaust gas venting chimney; 39. Desulfurization tower; 40. Tail gas chimney; 41. Blind flange; 42. Flue gas inlet; 43. Tail gas detection assembly. Detailed Implementation

[0041] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0042] In the description of this utility model, it should be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "circumferential", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] like Figure 1As shown, a vertical drying kiln production control device includes...

[0046] Vertical dryer 13, with a material conveying component at the upper end and a material output component at the output end;

[0047] The hot air output end of the fluidized bed furnace 6 is connected to the vertical dryer 13 through the hot air inlet main pipe 11 and multiple air inlet branch pipes 12 in sequence. The vertical dryer 13 is also connected to the exhaust gas treatment component. Multiple air distribution valves 14 are also installed on the hot air inlet main pipe 11.

[0048] The nitrogen supply component has its output end connected to the vertical dryer 13.

[0049] like Figure 1 As shown, in some embodiments, the material conveying assembly includes a kiln front silo 27, a weighing belt 28 is provided at the output end of the kiln front silo 27, a large-angle belt 29 is provided at the output end of the weighing belt 28, and the output end of the large-angle belt 29 is located at the upper end of the vertical dryer 13.

[0050] The material conveying assembly automatically starts and stops the weighing belt 28 and the steep-angle belt 29 according to the changes in the level gauge, supplies materials into the vertical dryer 13, and records the total amount of materials added to the drying oven.

[0051] In another embodiment, the fluidized bed furnace 6 is connected to the denitrification silo 1 via the denitrification agent spray gun pipe 3, and a denitrification feeder 2 is also installed between the denitrification agent spray gun pipe 3 and the denitrification silo 1. The fluidized bed furnace 6 is connected to the fuel silo 4 via the fuel pipe, and a coal feeder 5 is installed on the fuel pipe.

[0052] The fluidized bed furnace 6 is connected to a blower 8 and is equipped with a furnace door 7, a fluidized bed furnace mixing valve 9, and a slag discharge port 10. The blower 8 supplies a certain amount of air and pulverized coal into the fluidized bed furnace 6 to create combustion conditions. With the data support provided by the laser dust meter, the ignition gun is turned on to ignite the fluidized bed furnace 6.

[0053] In other embodiments, the bottom of the fluidized bed furnace 6 is equipped with a gas distribution system, and the flow rate of the gas determines the flow state of the material. Powdered coal from the fuel bin 4 is fed into the fluidized bed furnace 6 at a set frequency by the coal feeder 5. As the hot gas flow rate increases, the fuel particles in the furnace are carried up by the airflow, forming a state similar to boiling. This state causes the furnace sand to be suspended in the airflow, improving the efficiency of heat and mass exchange.

[0054] During normal production, the heat of the vertical dryer 13 comes from the combustion in the fluidized bed furnace. Due to the limitation of the denitrification agent reaction temperature, the temperature of the fluidized bed furnace's inlet must be controlled at 700-900℃ (750-800℃ is optimal). Controlling the coal feed rate is crucial to ensuring a stable and continuous heat supply from the fluidized bed furnace 6. If there is too much fuel in the fluidized bed furnace 6, it cannot burn completely, easily causing the hot slag inside to clump together. More importantly, excessive heat entering the vertical dryer 13 can easily lead to uncontrolled temperature in the drying zone. If there is insufficient fuel in the fluidized bed furnace 6, the system heat will be insufficient, affecting the drying quality of the charcoal. Therefore, if the inlet temperature rises continuously by more than 20℃ in a short period without falling back, it is considered excessive fuel, and the coal feeding frequency should be reduced by 0.2-0.5 Hz each time until the inlet temperature stabilizes and the combustion flame is normal. Conversely, if the inlet temperature drops continuously by more than 20℃ in a short period without rising back up, it is considered insufficient fuel, and the coal feeding frequency should be increased by 0.2-0.5 Hz each time until the inlet temperature stabilizes and the combustion flame is normal. This cycle repeats continuously to maintain the heat stability of the drying system.

[0055] The lower end of the vertical dryer 13 is conical, and the upper end of the vertical dryer 13 has a buffer chamber 31, and a cloth feeder 30 is installed at the output end of the buffer chamber 31.

[0056] Specifically, a radar level gauge is installed on the top of the buffer silo 31. The level gauge works in conjunction with the weighing belt 28 and the steep-angle belt 29 to complete automatic material feeding and conveying. Specifically, the material level has high and low start / stop values. When the material level reaches a low value, the DCS issues a command to sequentially start the steep-angle belt 29 and the weighing belt 28 to feed material into the buffer silo 31; when the material level reaches a high value, the DCS issues a command to sequentially stop the weighing belt 28 and the steep-angle belt 29 to stop feeding material into the buffer silo 31, reducing the labor intensity of operators and minimizing losses such as equipment damage caused by operational errors.

[0057] In some embodiments, the nitrogen supply assembly includes a nitrogen pipeline 15, which is connected to the nitrogen supply assembly. The other end of the nitrogen pipeline 15 is connected to a first branch pipe and a second branch pipe. The first branch pipe is connected to the middle of the vertical dryer 13, and the second branch pipe is connected to the lower end of the vertical dryer 13. A first-layer nitrogen valve 16 and a conical nitrogen valve 17 are respectively installed on the first branch pipe and the second branch pipe.

[0058] The nitrogen supply system consists of one purified ash storage tank, two nitrogen compressors, one silo top dust collector, two secondary dust collectors, one refrigerated dryer, one gas concentration monitor, and high and low pressure nitrogen storage tanks. The system includes two level switches (high level + low level) and one radar level for the purified ash storage tank. Nitrogen pressure balancing devices are installed between the high and low pressure nitrogen storage tanks and between the purified ash silos. Each positive pressure incineration conveying unit consists of a rotary feeder, a positive pressure Roots blower, and an inlet gate valve, totaling three sets. Each conveying pipeline is equipped with a pressure transmitter to monitor the conveying pressure. The negative pressure ash discharge system consists of a ash silo, a silo top dust collector, a silo top ash discharge valve assembly, a vacuum Roots blower, primary gas, and secondary gas. Pressure gauges and temperature transmitters are installed on the Roots blower inlet pipeline to monitor system pressure and temperature.

[0059] In other embodiments, each drying zone in the vertical dryer 13 is equipped with temperature monitoring and interlocking values. When the temperature of each drying zone rises to the interlocking value, it is considered that red material is generated in the vertical dryer 13, and the interlocking fluidized bed furnace 6 is automatically cut off from the heat source. At the same time, the nitrogen protection and spraying device are automatically turned on.

[0060] The high-temperature interlocking system in the drying zone consists of thermocouples, solenoid valves, nitrogen pipeline 15, and fire sprinkler systems. Thermocouples are evenly distributed throughout the vertical dryer 13 to monitor the material temperature in each area. When any temperature reaches the interlocking set value, it is considered that the material inside the dryer has caught fire, and the DCS issues the following commands: ① Immediately interrupt the fuel supply from the coal feeder 5 to the fluidized bed furnace 6; ② Reduce the frequency of the induced draft fan 37 to a slightly negative pressure airflow; ③ Use solenoid valves to control the automatic opening of the sprinklers on the emergency discharge belt 23 and the finished product discharge belt 24; ④ Control the opening of the nitrogen valve 16 on the first layer of the kiln body at the bottom of the vertical dryer 13 and the nitrogen valve 17 in the kiln cone to replenish nitrogen into the dryer; ⑤ Automatically start the emergency discharge belt 23; ⑥ Switch the discharge tee 22 to the direction of the emergency discharge belt 23 to take emergency response measures. This system has the advantages of fast response to abnormal operating conditions, reduced personnel intervention, accurate and reliable response measures, and avoids secondary safety accidents caused by flammable materials entering the production line.

[0061] The feeding process is based on the material level setting of the buffer silo level gauge 37. The feeding starts automatically when the lower limit is 3.5 meters and stops automatically when the upper limit is 1.7 meters. The material is autonomously supplied to the dryer buffer silo from the kiln front silo 27, through the weighing belt 28 and the large-angle belt 29 according to the set program. The total amount of material added to the dryer is recorded by the electronic belt scale.

[0062] An infrared thermometer is installed above the finished product discharge belt 24 to monitor the temperature of the dried charcoal material in a timely and accurate manner. A high-temperature alarm and interlock are set to remind operators to take timely response measures. When the detected temperature reaches the interlock set value, it is considered that the high-temperature material discharged from the dryer has caught fire. The DCS issues the following commands: ① Automatically start the emergency discharge belt 23 to take emergency response measures; ② Switch the discharge tee 22 to the direction of the emergency discharge belt 23; ③ Use a solenoid valve to control the automatic opening of the spray nozzles on the emergency discharge belt 23 and the finished product discharge belt 24; ④ Control the opening of the nitrogen valve 16 on the first layer of the kiln body at the bottom of the vertical dryer 13 and the nitrogen valve 17 in the kiln cone to replenish nitrogen into the dryer. This system has advantages such as fast response speed to abnormal operating conditions, reduced personnel intervention, accurate response measures, and safety and reliability, preventing flammable materials from entering the production line and causing secondary safety accidents.

[0063] In some embodiments, the material output assembly includes an electro-hydraulic push rod 18 installed at the output end of the vertical dryer 13. An opening baffle is installed at the output end of the electro-hydraulic push rod 18. A slide valve 19 and a discharge vibrating feeder 20 are also installed at the output end of the vertical dryer 13. An emergency discharge pipe and a discharge pipe are installed at the output end of the discharge vibrating feeder 20. A discharge three-way pneumatic valve 21 is installed on the emergency discharge pipe. A discharge three-way valve 22 is installed on the discharge pipe. An emergency discharge belt 23 is provided at the output end of the emergency discharge pipe. A finished product discharge belt 24 is provided at the output end of the finished product discharge belt 24. A finished product bin 25 is also provided at the output end of the finished product bin 25. A vibrating feeder 26 is also installed at the bottom of the finished product bin 25.

[0064] In other embodiments, a spraying device is also installed on the finished product discharge belt 24, and the material output component is equipped with temperature monitoring and an alarm interlock value. When the monitored temperature rises to the interlock value, it is considered that there is a fire in the finished product discharge equipment, and the interlock is activated to start the emergency belt for emergency material discharge. At the same time, the nitrogen protection and spraying device are automatically turned on.

[0065] Furthermore, the material conveying assembly is also equipped with a moisture detection device, which is used to monitor the moisture content of the dried charcoal material at any time. The moisture content of the dried charcoal material is affected by various factors, including the temperature of the fluidized bed furnace front chamber, the temperature of the air inlet pipe, the temperature of each drying zone of the dryer, the discharge temperature, the dust removal inlet temperature, the discharge rate, and the material level in the dryer.

[0066] In this embodiment, the exhaust gas treatment component includes a dust removal air inlet branch pipe 32 connected to the fluidized bed furnace 6. The output end of the dust removal air inlet branch pipe 32 is connected in sequence to a dust removal air inlet main pipe 33 and a dust collector 34. The dust removal output end of the dust collector 34 is also connected to a dust removal ash silo pump 35 and a pneumatic conveying ash pipeline 36.

[0067] The vertical dryer 13 is composed of multiple columns, and the kiln body is divided into eight drying zones along the vertical direction, with tumbling plates arranged in each drying zone. The induced draft fan 37 draws heat generated in the fluidized bed furnace 6 through the side of the vertical dryer 13, passing it from the tumbling plates inside the kiln. This creates a certain airflow that evaporates and removes moisture from the charcoal material inside the dryer, completing the drying process. The dried exhaust gas is collected through four branch pipes 32 and then drawn into the main exhaust pipe 33, where it is drawn into the dust collector 34 and finally discharged into the atmosphere via the desulfurization tower. If the system airflow is too small, heat will accumulate inside the dryer, making it difficult to control the temperature in the drying zone and even causing the material to turn red. Therefore, maintaining a balance between heat and airflow throughout the system is crucial for controlling the moisture content of the dried charcoal material.

[0068] The dust collector 34 is connected in sequence to an induced draft fan 37 and an exhaust gas venting chimney 38 at its gas output end. A blind plate 41 is installed on the exhaust gas venting chimney 38. The exhaust gas venting chimney 38 is connected to the flue gas inlet 42 through an exhaust pipe. The flue gas inlet 42 is installed on the desulfurization tower 39. The exhaust end of the desulfurization tower 39 is also equipped with a tail gas chimney 40 and a tail gas detection component 43.

[0069] During the furnace start-up and ignition process, blower 8 is turned on at a frequency of 10Hz, and induced draft fan 37 is turned on to maintain the furnace air pressure at 20KPa. The dust concentration is maintained at 20mg / m³ according to the data provided by the dust concentration meter. 3 Ignition is initiated by turning on the ignition gun, causing combustion to occur between the air, pulverized coal, and ignition source within the fluidized bed furnace 6. The explosion control range for pulverized coal dust is (45mg-2000mg) / m³. 3 .

[0070] The induced draft fan 37 draws the heat generated in the fluidized bed furnace 6 through the side of the vertical dryer 13 from the position of the kiln's tumbling plate, forming a certain air volume to evaporate and carry away the moisture in the charcoal material inside the dryer. The exhaust gas is collected through four branch pipes 32 and then drawn into the main exhaust pipe 33 and sucked into the dust collector 34. The dust in the exhaust gas is collected in the dust collection ash silo pump 35 and then transported to the centralized dust collection point for recycling via the pneumatic conveying ash pipeline 36.

[0071] The denitrification unit is used to neutralize nitrogen oxides released during the combustion of fuel in the fluidized bed furnace 6. The exhaust gas, after dust collection by the dust collector 34, enters the desulfurization tower 39 through the flue gas inlet 42 under the action of the induced draft fan 37, where wet desulfurization technology is used to remove sulfur dioxide from the flue gas. The treated exhaust gas is then discharged into the atmosphere through the exhaust gas chimney 40.

[0072] The online monitoring component 43 is installed at the exhaust gas chimney 40, specifically at the exhaust outlet of the desulfurization tower 39 at the end of the system. This facilitates the monitoring of the emissions of nitrogen oxides, sulfur dioxide, soot, and other components in the exhaust gas generated by the drying system, and allows for adjustments to the production status based on the monitoring data.

[0073] This system is used to monitor the emissions of the three pollutants mentioned above in the exhaust gas. High-limit alarm values ​​are set for each pollutant. When nitrogen oxide emissions reach the high-limit alarm value, the denitrification agent feeder frequency is increased, increasing the amount of denitrification agent used to control emissions. When emissions are low, the denitrification agent feeder frequency can be reduced to control costs. When sulfur dioxide emissions reach the high-limit alarm value, the desulfurization agent regulating valve opening is increased, increasing the amount of desulfurization agent used to control emissions. When emissions are low, the desulfurization agent regulating valve opening can be reduced to control costs.

[0074] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A production control device for a vertical drying kiln, characterized by: The utility model provides a vertical dryer (13) upper end is provided with material conveying assembly, and the vertical dryer (13) output is provided with material output assembly; Boiling furnace (6), the hot gas output end of boiling furnace (6) passes through hot air inlet main pipe (11) and multiple air inlet branch pipes (12) in proper order with vertical dryer (13) is communicated, and the vertical dryer (13) is still connected with tail gas treatment assembly; Nitrogen supply assembly, the output of nitrogen supply assembly is communicated with the vertical dryer (13). The material conveying assembly includes kiln front bin (27), the kiln front bin (27) output is provided with weighing belt (28), the output of weighing belt (28) is provided with large inclination angle belt (29), and the output of large inclination angle belt (29) is located in the upper end of vertical dryer (13).

2. The vertical kiln production control apparatus of claim 1, wherein: The boiling furnace (6) is connected with denitration agent bin (1) through denitration agent spray gun pipeline (3), and denitration agent spray gun pipeline (3) and denitration agent bin (1) are also installed with denitration feeder (2) between them; 3. The vertical kiln production control apparatus of claim 1 wherein: The boiling furnace (6) is connected with fuel bin (4) through fuel pipe, and coal feeder (5) is installed on the fuel pipe. The boiling furnace (6) is connected with air blower (8), and the boiling furnace (6) is installed with fire door (7), boiling furnace air mixing valve (9) and slag outlet (10).

4. The vertical kiln production control apparatus of claim 1 wherein: The lower end of the vertical dryer (13) is conical, and the upper end of the vertical dryer (13) has a buffer bin (31), and the buffer bin (31) is installed with a distributor (30) at the output end.

5. The vertical kiln production control apparatus of claim 1 wherein: The nitrogen supply assembly includes a nitrogen pipeline (15), which is connected to a nitrogen supply assembly. The other end of the nitrogen pipeline (15) is connected to a first branch pipe and a second branch pipe. The first branch pipe communicates with the middle part of the vertical dryer (13), and the second branch pipe communicates with the lower end of the vertical dryer (13). The first branch pipe and the second branch pipe are respectively installed with a kiln body layer nitrogen valve (16) and a kiln body conical part nitrogen valve (17).

6. The vertical kiln production control apparatus of claim 1 wherein: The material output assembly includes an electro-hydraulic push rod (18) installed at the output end of the vertical dryer (13). The electro-hydraulic push rod (18) is installed with an opening baffle at the output end. The output end of the vertical dryer (13) is also installed with a plug valve (19) and a discharge vibrating feeder (20). The discharge vibrating feeder (20) is installed with an emergency discharge pipe and a discharge pipe at the output end. The emergency discharge pipe is installed with a discharge tee pneumatic valve (21). The discharge pipe is installed with a discharge tee (22). The output end of the emergency discharge pipe is provided with an emergency discharge belt (23). The output end of the discharge pipe is provided with a finished product discharge belt (24). The output end of the finished product discharge belt is also provided with a finished product bin (25). The bottom of the finished product bin (25) is also installed with a vibrating feeder (26).

7. The vertical kiln production control apparatus of claim 1 wherein: ​ 8. The vertical kiln production control apparatus of claim 1 wherein: The tail gas treatment assembly comprises a dust removal air inlet branch pipe (32) communicated with the fluidized bed boiler (6), a dust removal air inlet main pipe (33) and a dust remover (34) connected in sequence at the output end of the dust removal air inlet branch pipe (32), and a dust removal ash bin bin pump (35) and a pneumatic conveying ash conveying pipeline (36) further connected at the dust removal output end of the dust remover (34).

9. The vertical kiln production control apparatus of claim 8 wherein: The gas output end of the dust remover (34) is further connected in sequence with an induced draft fan (37) and a waste gas venting chimney (38), a blind plate (41) is installed on the waste gas venting chimney (38), the waste gas venting chimney (38) is connected with a flue gas inlet (42) through an exhaust pipe, the flue gas inlet (42) is installed on a desulfurization tower (39), and a tail gas chimney (40) and a tail gas detection assembly (43) are further installed at the exhaust end of the desulfurization tower (39).

10. The vertical kiln production control apparatus of claim 1 wherein: A plurality of air distribution valves (14) are further installed on the hot air air inlet main pipe (11).

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