Automatic adjusting system and method for preventing ash blockage and controlling temperature and humidity of ash bin

Abstract

The invention discloses an ash bin anti-blocking temperature-control humidity-control automatic adjusting system and method, the system comprises an ash bin, a first air outlet device, a second air outlet device and an air inlet heating device, an air outlet of the air inlet heating device is connected with the ash bin, and the air inlet heating device is used for inputting heated gas into the ash bin from the outside of the ash bin; air inlets of the first air outlet device and the second air outlet device are connected with the ash bin; the first air outlet device is used for outputting gas in the ash bin out of the ash bin, so that fly ash fluidity is kept in the ash bin, and negative pressure is generated; the flow of the second air outlet device is larger than that of the first air outlet device, and the second air outlet device is used for outputting gas in the ash bin out of the ash bin when the air inlet heating device is started, so that negative pressure is kept in the ash bin. Heat preservation and dehumidification in the ash bin can be achieved, the fluidity in the ash bin is ensured, it is avoided that fly ash caking in the ash bin influences the quality of fly ash chelating and curing, and negative pressure in the ash bin can be continuously ensured in the adjusting process.

Description

Technical Field

[0001] The present invention relates to the technical field of ash bins, and in particular to an automatic regulating system and method for preventing ash blocking, controlling temperature and humidity in ash bins. Background Art

[0002] In recent years, waste incineration power plants have sprung up like mushrooms. In waste incineration power plants, the incineration of waste by waste incineration boilers will produce fly ash (hazardous waste) containing heavy metals and dioxins. The ash bin is the initial storage facility for fly ash, and an on-site chelation and solidification device is installed under the fly ash bin. If the fly ash has poor fluidity, high water content, or even agglomerates, it will greatly affect the quality of fly ash chelation and solidification, and even require secondary chelation, increasing the manpower and material expenditure of the enterprise. And as time goes by, due to the strong corrosiveness of fly ash produced by waste incineration, the ash bin is prone to leaks, and air can easily penetrate into the bin. After the fly ash absorbs the moisture that penetrates into the air, it is easy to agglomerate. At the same time, the lower the temperature of the ash bin, the easier it is for the fly ash to absorb moisture, and the moisture is not easy to discharge. Therefore, it is extremely important to regulate the temperature and humidity in the ash bin. Summary of the invention

[0003] The invention provides an automatic regulating system and method for preventing fly ash from being blocked and controlling temperature and humidity in an ash silo, which are used to solve the problems of poor fluidity, high water content and fly ash agglomeration in the ash silo.

[0004] On the one hand, the present invention provides an automatic adjustment system for preventing ash silo blockage, controlling ash temperature and controlling humidity, comprising an ash silo, a first air outlet device, a second air outlet device, and an air inlet heating device.

[0005] The air outlet of the air inlet heating device is connected to the ash bin, and the air inlet heating device is used to input heated gas from outside the ash bin into the ash bin;

[0006] The air inlets of the first air outlet device and the second air outlet device are both connected to the ash bin;

[0007] The first air outlet device is used to output the gas in the ash bin to the outside of the ash bin, so that the fly ash fluidity is maintained and negative pressure is generated in the ash bin;

[0008] The flow rate of the second air outlet device is greater than the flow rate of the first air outlet device. The second air outlet device is used to output the gas in the ash bin to the outside of the ash bin when the air inlet heating device is turned on, so as to maintain a negative pressure in the ash bin.

[0009] Furthermore, the air inlets of the first air outlet device and the second air outlet device are both connected to the ash bin via a filter device, and the filter device is used to prevent fly ash in the ash bin from being discharged outside the ash bin.

[0010] Furthermore, the air inlet of the filter device is arranged on the top of the ash bin.

[0011] Furthermore, the air inlet heating device is arranged at the bottom of the ash bin.

[0012] Furthermore, a temperature meter, a humidity meter and a negative pressure gauge are provided in the middle and upper part of the ash bin.

[0013] Furthermore, a flow controller is provided at the air inlet end of the second air outlet device, and the flow controller is used to control the flow of the second air outlet device to ensure the negative pressure in the ash bin.

[0014] On the other hand, the present invention provides an automatic adjustment method for preventing ash silo from blocking, controlling temperature and humidity, which is characterized by comprising:

[0015] When the temperature in the ash bin is not lower than the temperature setting value and the humidity is not higher than the humidity setting value, the first air outlet device is turned on, and the second air outlet device and the air inlet heating device are turned off;

[0016] When the temperature in the ash bin is lower than the temperature setting value and / or the humidity is higher than the humidity setting value, the second air outlet device and the air inlet heating device are both turned on, and the first air outlet device is turned off.

[0017] Furthermore, when the temperature in the ash bin is lower than the temperature setting value and / or the humidity in the bin is higher than the humidity setting value, the second air outlet device is turned on first, and then the air inlet heating device is turned on.

[0018] Furthermore, after the air inlet heating device is turned on, the first air outlet device is turned off with a delayed delay.

[0019] Furthermore, when the temperature in the ash bin is lower than the temperature setting value and / or the humidity is higher than the humidity setting value, the flow rate of the second air outlet device is adjusted according to the pressure conditions in the ash bin to ensure that negative pressure is maintained in the ash bin.

[0020] It can be seen from the above technical solutions that the present invention has the following advantages:

[0021] On the one hand, the embodiment of the present invention continuously outputs the gas in the ash bin to the outside of the ash bin through the first air outlet device, so that the fly ash in the ash bin has fluidity, and takes away a certain amount of moisture from the ash bin to the outside of the ash bin, reducing the moisture content of the fly ash in the bin, and avoiding affecting the quality of the fly ash chelation and solidification. The heated gas is further output into the ash bin through the air inlet heating device, increasing the fluidity of the fly ash in the ash bin and the temperature in the bin, so that the moisture in the bin evaporates, the dehumidification capacity of the system is strengthened, and the fly ash in the ash bin is prevented from agglomerating under low temperature and high humidity conditions. In addition, the gas in the ash bin is output to the outside of the ash bin by setting a second air outlet device with a larger flow rate than the first air outlet device, thereby maintaining the negative pressure in the ash bin and avoiding the leakage of fly ash containing harmful substances to the outside of the ash bin.

[0022] On the other hand, in the embodiment of the present invention, when the humidity in the ash bin is not higher than the humidity setting value and / or the temperature is not lower than the temperature setting value, it is only necessary to operate the first air outlet device, and turn off the second air outlet device and the air inlet heating device; when the humidity in the ash bin is higher than the humidity setting value and / or the temperature is lower than the temperature setting value, the second air outlet device and the air inlet heating device are operated, and the first air outlet device is turned off. Therefore, the present embodiment can adjust the power consumption of the system according to the specific temperature and humidity conditions in the bin body, avoid the high-power air inlet heating device being turned on all the time, realize the temperature and humidity control in the ash bin, ensure that the quality of fly ash chelating and solidification is not affected, and achieve energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 A schematic diagram of the structure of an automatic adjustment system for preventing ash silo blockage, controlling ash temperature and controlling humidity provided by an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of the control component structure of an automatic adjustment system for preventing ash silo blockage, controlling ash temperature and controlling humidity provided by an embodiment of the present invention;

[0026] Figure 3 A schematic flow chart of an automatic adjustment method for preventing ash silo blockage, controlling temperature and controlling humidity provided by an embodiment of the present invention;

[0027] Explanation of the accompanying reference numerals: 1. Manual valve; 2. Electric valve; 3. Filter device; 4. Baffle; 5. Dust removal fan; 6. Temperature meter; 7. Humidity meter; 8. Negative pressure gauge; 9. Air cannon; 10. Fluidizing plate; 11. Electric switch; 12. Ash lowering valve; 13. Flow direction of compressed air. DETAILED DESCRIPTION

[0028] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and drawings of the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the implementation of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] See also Figure 1 , Figure 1 An automatic adjustment system for preventing ash silo blockage, controlling ash temperature and controlling humidity is provided in an embodiment of the present invention.

[0031] The present invention provides an automatic adjustment system for preventing ash silo from blocking, controlling ash temperature and controlling humidity, comprising an ash silo, a first air outlet device, a second air outlet device, and an air inlet heating device.

[0032] The air outlet of the air inlet heating device is connected to the ash bin, and the air inlet heating device is used to input heated gas from outside the ash bin into the ash bin;

[0033] The air inlets of the first air outlet device and the second air outlet device are both connected to the ash bin;

[0034] The first air outlet device is used to output the gas in the ash bin to the outside of the ash bin, so as to maintain the fluidity of the fly ash and generate negative pressure in the ash bin;

[0035] The flow rate of the second air outlet device is greater than the flow rate of the first air outlet device. The second air outlet device is used to output the gas in the ash bin to the outside of the ash bin when the air inlet heating device is turned on, so as to maintain a negative pressure in the ash bin.

[0036] It is understandable that, on the one hand, if the fly ash has poor fluidity, high water content, or even agglomerates, it will greatly affect the quality of fly ash chelation and solidification, and even require secondary chelation, increasing the manpower and material expenditure of the enterprise. In specific implementation, this embodiment continuously outputs the gas in the ash bin to the outside of the ash bin through the first exhaust fan, so that the fly ash in the ash bin has fluidity, and takes away a certain amount of water from the ash bin to the outside of the ash bin, reducing the water content of the fly ash in the bin, and avoiding affecting the quality of fly ash chelation and solidification.

[0037] On the other hand, since the fly ash produced by garbage incineration is highly corrosive, the ash bin is prone to leaks, and air can easily penetrate into the bin. After the fly ash absorbs moisture from the infiltrated air, it is easy to agglomerate. At the same time, the lower the temperature of the ash bin, the easier it is for the fly ash to absorb moisture, and moisture is not easy to discharge. In specific implementation, the heated gas is output into the ash bin through the air inlet heating device, which further increases the fluidity of the fly ash in the ash bin and increases the temperature in the bin to evaporate the moisture in the bin, thereby enhancing the dehumidification capacity of the system and preventing the fly ash in the ash bin from agglomerating under low temperature and high humidity conditions. However, when the air inlet heating device is running, the gas in the ash bin increases, resulting in positive pressure. In order to ensure negative pressure in the ash bin and discharge the gas containing moisture in time to reduce the humidity in the bin, this embodiment outputs the gas in the ash bin to the outside of the ash bin by setting a second outlet fan with a larger flow rate than the first outlet fan, thereby maintaining negative pressure in the ash bin and preventing fly ash containing harmful substances from leaking out of the ash bin.

[0038] In a more specific embodiment, the ash bin is provided with an ash inlet (not shown in the figure), and the ash inlet is connected to the ash production equipment. It is understandable that, in specific implementation, when fly ash enters the ash bin from the ash inlet, positive pressure will be generated in the ash bin, and when the air inlet heating device is in operation, positive pressure will also be generated in the ash bin, so the first air supply device and the second air supply device can timely transport gas from the ash bin to the outside of the ash bin to keep the ash bin in a negative pressure state.

[0039] It should be noted that the reason why the ash bin needs to maintain negative pressure continuously is: on the one hand, a pressure gradient from outside to inside will be formed, so that the fly ash gas can be smoothly sucked into the ash bin from the ash production equipment. On the other hand, the dust generated in many industrial production processes contains harmful substances, such as heavy metals (lead, mercury, etc.) and chemicals (sulfur dioxide, nitrogen oxides, dioxins, etc.). If the ash bin is not under negative pressure, the dust will leak into the workshop or outdoor environment, which will cause serious pollution to the surrounding air quality. In a normally operating ash bin, if the ash bin is under positive pressure, the dust is very fine and can easily overflow from the poorly sealed parts of the ash bin (such as the feed port, the gaps around the observation window, etc.) under pressure, causing dust pollution. Maintaining a negative pressure state can effectively avoid this situation.

[0040] In a more specific embodiment, the air inlets of the first air outlet device and the second air outlet device are both connected to the ash bin through the filter device.

[0041] In a more specific embodiment, the filtering device 3 includes a first dust collector and a second dust collector, the first dust collector is an ash bin bag dust collector, and the first air outlet device is connected through the ash bin bag dust collector. The filter bags of the ash bin bag dust collector mainly consider wear resistance and good air permeability, and generally conventional materials such as polyester fiber can be used. Because the dust treated is at room temperature, the high temperature resistance requirement for the filter bags is relatively low; the second dust collector is a boiler bag dust collector, and the second air outlet device is connected through the boiler bag dust collector. The filter bags of the boiler bag dust collector need to have the characteristics of high temperature resistance, corrosion resistance, and wear resistance. For high temperature environments, special materials such as glass fiber, aramid fiber, and polyphenylene sulfide (PPS) are generally used. When heated gas is input into the ash bin, the gas temperature is relatively high, and a high temperature resistant boiler bag dust collector is required to discharge the gas in the ash bin.

[0042] In some specific implementations, the filtering device 3 includes a boiler bag filter, and the first air outlet device and the second air outlet device are both connected to the ash bin through the boiler bag filter.

[0043] It can be understood that, in specific implementation, this embodiment only allows gas to pass through the filter device 3, and blocks the fly ash that flows with the gas to the first air supply device and the second air supply device, thereby preventing the fly ash from being output outside the ash bin and polluting the environment.

[0044] In a more specific embodiment, the first air outlet device includes a dust removal fan 5, the flow rate of the dust removal fan 5 is 1000-3000m³ / h, and the dust removal fan 5 includes a motor and an impeller, and the motor output shaft is connected to the middle of the impeller. It can be understood that in the specific implementation, the motor drives the impeller to rotate at a high speed, and the rotation of the impeller accelerates and discharges the air at the fan inlet, thereby forming a low pressure area at the inlet.

[0045] In a more specific embodiment, the first air outlet device also includes a baffle 4, which is arranged between the dust removal fan 5 and the filter device 3. It can be understood that the dust removal fan 5 of this embodiment runs continuously, and the first air outlet device can be quickly opened and closed through the baffle 4. The baffle 4 is the switch of the first air outlet device. When the baffle 4 is opened, the gas in the ash bin is discharged to the outside of the ash bin through the dust removal fan 5 under the suction action of the dust removal fan 5. When the baffle 4 is closed, the baffle 4 blocks the gas in the ash bin from being discharged to the outside of the ash bin through the dust removal fan 5.

[0046] In a more specific embodiment, the second air outlet device includes an induced draft fan, a flow controller, and a manual valve 1;

[0047] An induced draft fan is a mechanical device used to extract gas (usually air, flue gas, etc.) from one space and transport it to another space. Its main function is to create a negative pressure environment in a ventilation system or industrial process to promote gas flow. The induced draft fan drives the impeller to rotate through a motor. The blades of the impeller do work on the gas during rotation, allowing the gas to gain energy and generate centrifugal force. Under the action of centrifugal force, the gas is thrown from the center of the impeller to the edge of the impeller, thereby forming a low-pressure area in the center of the impeller. The gas in the ash bin is continuously sucked into the center of the impeller under the action of atmospheric pressure, and then transported to the outside of the ash bin as the impeller rotates, thus realizing the gas suction and transportation process. The flow rate of the induced draft fan is 50,000-200,000 m³ / h;

[0048] The flow controller is an electric valve 2, which is arranged between the induced draft fan and the filter device 3. In addition to being used to open and close the second air outlet device, the electric valve 2 is also used to control the air flow rate of the second air outlet device. It can be understood that during the specific implementation, the flow rate of the second air outlet device is adjusted according to the real-time pressure conditions in the ash bin to avoid positive pressure in the ash bin and maintain negative pressure in the ash bin.

[0049] The manual valve 1 is arranged between the induced draft fan and the filter device 3 and on one side of the electric valve 2. In specific implementation, the manual valve 1 remains normally open. When the electric valve 2 fails, the second air outlet device is opened and closed by the manual valve 1.

[0050] In a more specific embodiment, the filter device 3 and the first air supply device and the second air supply device are all arranged on the top of the ash bin. It is understandable that, in a specific implementation, when the fly ash enters the ash bin from the ash inlet, the fly ash will naturally settle under the action of gravity. The filter device 3 and the first air supply device and the second air supply device are all arranged on the top. Under the action of the first air supply device and the second air supply device, the flow direction of the fly ash-containing gas in the ash bin is from bottom to top, which is conducive to the fly ash-containing gas gradually settling to the bottom of the ash bin during the rising process, so that most of the fly ash is separated and falls to the bottom of the ash bin before the fly ash-containing gas reaches the filter device 3, reducing the wear of the first air supply device and the second air supply device and the burden of the filter device 3.

[0051] In a more specific embodiment, the air inlet heating device is arranged at the bottom of the ash bin. It can be understood that, in a specific implementation, the heated gas output by the air inlet heating device enters from the bottom of the ash bin, which can thoroughly heat and dehumidify the fly ash in the bin and improve the fluidity of the fly ash in the bin to avoid agglomeration.

[0052] In a more specific embodiment, the bottom of the ash bin is a cone-shaped structure, and an ash discharge port and an ash discharge valve 12 are arranged at the bottom of the cone-shaped structure. Compared with a flat bottom structure, the cone-shaped structure forms a natural slope, allowing fly ash to flow more easily to the ash discharge port at the bottom of the ash bin, and allowing the fly ash to gather toward the center of the bottom under the action of its own gravity.

[0053] In a more specific embodiment, the air inlet heating device includes a fluidizing plate 10, an air compressor and an electric heater. The fluidizing plate 10 is arranged on the inner surface of the cone hopper, the air inlet end of the fluidizing plate 10 is connected to one end of the electric heater, and the other end of the electric heater is connected to the air compressor; the electric heater can be arranged inside the fluidizing plate 10 or outside the ash bin. The air compressor is arranged outside the ash bin.

[0054] It can be understood that the fluidizing plate 10 is a device with multiple tiny air holes, which can allow the gas released by the air compression device to evenly pass through the fluidizing plate 10, so that the gas rises to the ash bin at a uniform flow rate and pressure, so that the fly ash can flow under the push of the gas, promote the volatilization of the liquid attached to the fly ash, and effectively prevent the fly ash from easily agglomerating and clogging at the bottom of the ash bin.

[0055] In a more specific embodiment, a fluidizing plate 10 is set at an angle of every 60° on the surface of the ash bin cone bucket, which is divided into two layers, with 6 fluidizing plates in each layer, for a total of 12. Space needs to be reserved between the fluidizing plates 10 for other equipment. This embodiment recommends setting a fluidizing plate 10 at an angle of every 60°, because too many fluidizing plates 10 will cause an excessive flow rate entering the ash bin and cause a positive pressure in the ash bin, while too few fluidizing plates 10 will not achieve the purpose of uniformly fluidizing the fly ash in the ash bin.

[0056] In a more specific embodiment, the inlet of each fluidizing plate 10 is connected to one end of a total compressed air pipe, the other end of the compressed air pipe is connected to the air compressor, and a manual switch and an electric switch 11 are provided on the compressed air pipe to control the connection and blocking between the compressed air machine and the fluidizing plate 10. In a more specific embodiment, the manual switch is a manual valve, and the electric switch 11 is a solenoid valve or an electric valve.

[0057] In a more specific embodiment, the inlet of each fluidizing plate 10 is provided with a separate manual valve to ensure that a single fluidizing plate 10 can be isolated for maintenance when it fails.

[0058] In a more specific embodiment, the electric heater is an electric heating wire, which is arranged in the fluidizing plate 10. The compressed gas is first heated after entering the fluidizing plate 10, and the heated gas flows out from the small air holes of the fluidizing plate 10 into the ash bin to heat the fly ash in the ash bin, evaporate and take away moisture. The internal fluidization of the fly ash is achieved through the fluidizing plate 10, which can reduce the adhesion between the fly ashes and more efficiently insulate and dehumidify the fly ash inside the ash bin.

[0059] In a more specific implementation, the air outlet of the air compressor is connected to a dehumidification device. After the compressed air passes through the dehumidification device, the water content in the air can be reduced during rainy weather. The working medium introduced into the fluidizing plate 10 is dehumidified compressed air, which can loosen the ash and reduce the friction between the fly ash particles to achieve efficient fluidization.

[0060] In a more specific embodiment, the dehumidification device is a heating dehumidifier, which ensures that the air entering the fluidizing plate is dry and also allows the air input to the fluidizing plate to be heated, thereby reducing the heating burden of the electric heater.

[0061] In some more specific embodiments, high-temperature steam or hot air is directly introduced into the air inlet end of the air compressor.

[0062] Therefore, this embodiment proposes to use heated dehumidified fluid as the working medium of the fluidizing plate 10, which is input into the ash bin to heat the fly ash, thereby optimizing the heating method of the fly ash inside the ash bin, achieving uniform heating, and efficiently improving the fluidity of the fly ash.

[0063] In a more specific embodiment, two groups of thermometers 6, hygrometers 7 and negative pressure gauges 8 (two each, a total of six) are respectively arranged in the middle and upper part of the ash bin. The thermometers 6, hygrometers 7 and negative pressure gauges 8 are arranged in the middle and upper part of the ash bin to prevent the fly ash in the bin from covering the instruments and affecting the measurement accuracy.

[0064] In a more specific embodiment, due to the strong corrosiveness of fly ash, facilities with compressed air blowing cleaning function and anti-corrosion are set near the thermometer 6, humidity meter 7 and negative pressure gauge 8, or anti-corrosion and dust-proof instruments are directly selected, and compressed air is used to regularly clean the thermometer 6, humidity meter 7 and negative pressure gauge 8.

[0065] In a more specific embodiment, in order to prevent dust from agglomerating and blocking the ash outlet, an air cannon 9 and a vibrator are provided at the cone hopper to assist in the ash discharge. The air cannon 9 and the vibrator are provided in the empty space between the fluidizing plates 10. It can be understood that when only the first air outlet device is started, the air cannon 9 functions as a device for outputting compressed air to break the bridge of the ash bin and improve the fluidity of the fly ash. The vibrator enhances the fluidity when the ash is discharged from the ash bin. When the second air outlet device and the air inlet heating device are started, the fluidity of the fly ash in the ash bin is sufficient and the ash bin may be in a state of negative pressure but close to positive pressure at this time. Therefore, it is necessary to turn off the timed start function of the air cannon 9 to avoid the ash bin becoming positive pressure when the air cannon 9 is automatically started.

[0066] In a more specific embodiment, the automatic adjustment system for preventing ash bin blockage, controlling ash temperature and controlling humidity also includes: a control component, such as Figure 2As shown, the control component includes a digital information system and a feedback controller. The digital information system is connected to the feedback controller. The digital information system is respectively connected to the thermometer 6, the hygrometer 7, and the negative pressure gauge 8. The feedback control system is respectively connected to the baffle 4 of the first air outlet device, the electric valve 2 of the second air outlet device, and the electric switch 11 of the air inlet heating device.

[0067] In a more specific embodiment, the central control system is a DCS system, and the feedback controller is a PID controller. It is understandable that, in specific implementation, the thermometer 6, the hygrometer 7, and the negative pressure gauge 8 feedback data to the DIS system, and the DIS system transmits the data to the PID controller, and the PID controller obtains the feedback data to calculate the deviation value from the temperature setting value, the humidity setting value, and the pressure setting value. According to the deviation value, the PID controller quickly responds to control the working state of the baffle 4 of the first air outlet device, the electric valve 2 of the second air outlet device, and the electric switch 11 of the air inlet heating device.

[0068] It should be noted that when the temperature in the ash bin is lower than the temperature setting value, it is a low temperature state, and when the humidity in the ash bin is higher than the humidity setting value, it is a high humidity state. At this time, the temperature and humidity in the ash bin need to be regulated by the air inlet heating device and the second air outlet device. The humidity setting value and the temperature setting value are set based on experience. The pressure setting value is the atmospheric pressure value. When the pressure value in the ash bin is less than the atmospheric pressure value, it is a negative pressure state. When the pressure value in the ash bin is greater than the atmospheric pressure value, it is a positive pressure state.

[0069] This embodiment also provides an automatic adjustment method for preventing ash bin blockage, controlling ash temperature and controlling humidity, such as Figure 3 As shown, including:

[0070] When the temperature in the ash bin is not lower than the temperature setting value and the humidity in the bin is not higher than the humidity setting value, the first air outlet device is turned on, and the second air outlet device and the air inlet heating device are both turned off;

[0071] When the temperature in the ash bin is lower than the temperature setting value and / or the humidity in the bin is higher than the humidity setting value, the second air outlet device and the air inlet heating device are both turned on, and the first air outlet device is turned off.

[0072] It can be understood that, in specific implementation, when the humidity in the ash bin is not higher than the set value and / or the temperature is not lower than the set value, only the first air outlet device needs to be operated, and the second air outlet device and the air inlet heating device are turned off. When the humidity in the ash bin is higher than the set value and / or the temperature is lower than the set value, the second air outlet device and the air inlet heating device are operated, and the first air outlet device is turned off. Therefore, this embodiment can adjust the power consumption of the system according to the specific temperature and humidity conditions in the bin, ensuring that the quality of fly ash chelation and curing is not affected while saving energy.

[0073] In a more specific embodiment, when the temperature in the ash bin is lower than the temperature setting value and / or the humidity in the bin is higher than the humidity setting value, the order of turning on the second air outlet device and the air inlet heating device is: first turn on the second air outlet device, and then turn on the air inlet heating device.

[0074] It is understandable that, in specific implementation, if the air inlet heating device is turned on before the second air outlet device or is turned on at the same time as the second air outlet device, it will cause positive pressure in the ash bin, which may easily cause fly ash to overflow out of the ash bin. Therefore, in this embodiment, the second air outlet device is turned on first, and then the air inlet heating device is turned on to ensure negative pressure in the ash bin.

[0075] In a more specific embodiment, the first air outlet device is closed after the air inlet heating device is turned on. It is understandable that in a specific implementation, a pressure peak will appear at the moment of turning on the air inlet heating device. When the air inlet heating device is turned on, it is necessary to use the first air outlet device to increase the negative pressure in the ash bin to avoid the pressure peak of the air inlet heating device causing a positive pressure in the ash bin. It should be noted that when the pressure peak of the air inlet heating device decreases, when the first air outlet device and the second air outlet device are turned on at the same time, since the flow rate of the first air outlet device is less than the flow rate of the second air outlet device, that is, the suction force of the first air outlet device is less than the suction force of the second air outlet device, it is easy to cause the dust removal fan 5 of the first air outlet device to reverse, resulting in damage to the dust removal fan 5 of the first air outlet device. Therefore, the baffle 4 of the first air outlet device is closed for 3 seconds after the air inlet heating device is turned on to avoid damage to the dust removal fan 5 of the first air outlet device.

[0076] In a more specific embodiment, when the temperature in the ash bin is lower than the temperature setting value and / or the humidity is higher than the humidity setting value, the flow rate of the second air outlet device is adjusted according to the pressure conditions in the ash bin to ensure that negative pressure is maintained in the ash bin.

[0077] The flow rate of the second air outlet device is adjusted according to the real-time pressure conditions in the ash bin to avoid excessive pressure in the ash bin and positive pressure.

[0078] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic adjustment system for preventing ash bin blockage, controlling ash temperature and humidity, characterized in that: It includes an ash bin, a first air outlet device, a second air outlet device, and an air inlet heating device. The air outlet of the air inlet heating device is connected to the ash bin, and the air inlet heating device is used to input heated gas from outside the ash bin into the ash bin; The air inlets of the first air outlet device and the second air outlet device are both connected to the ash bin; The first air outlet device is used to output the gas in the ash bin to the outside of the ash bin, so that the fly ash fluidity is maintained and negative pressure is generated in the ash bin; The flow rate of the second air outlet device is greater than the flow rate of the first air outlet device. The second air outlet device is used to output the gas in the ash bin to the outside of the ash bin when the air inlet heating device is turned on, so as to maintain a negative pressure in the ash bin.

2. The automatic adjustment system for preventing ash silo from blocking, controlling ash temperature and controlling humidity according to claim 1 is characterized in that: The air inlets of the first air outlet device and the second air outlet device are both connected to the ash bin via a filter device, and the filter device is used to prevent the fly ash in the ash bin from being discharged outside the ash bin.

3. The automatic adjustment system for preventing ash silo from blocking, controlling ash temperature and controlling humidity according to claim 2 is characterized in that: The air inlet of the filter device is arranged on the top of the ash bin.

4. The automatic adjustment system for preventing ash silo from blocking, controlling ash temperature and controlling humidity according to claim 3 is characterized in that: The air inlet heating device is arranged at the bottom of the ash bin.

5. The automatic adjustment system for preventing ash silo from blocking, controlling ash temperature and controlling humidity according to claim 1 is characterized in that: A temperature meter, a humidity meter and a negative pressure meter are arranged in the middle and upper part of the ash bin.

6. The automatic adjustment system for preventing ash silo from blocking, controlling ash temperature and controlling humidity according to claim 1 is characterized in that: A flow controller is provided at the air inlet end of the second air outlet device, and the flow controller is used to control the flow of the second air outlet device to ensure negative pressure in the ash bin.

7. An automatic adjustment method for the automatic adjustment system for preventing ash silo blockage, controlling temperature and controlling humidity according to any one of claims 1 to 6, characterized in that: include: When the temperature in the ash bin is not lower than the temperature setting value and the humidity is not higher than the humidity setting value, the first air outlet device is turned on, and the second air outlet device and the air inlet heating device are turned off; When the temperature in the ash bin is lower than the temperature setting value and / or the humidity is higher than the humidity setting value, the second air outlet device and the air inlet heating device are both turned on, and the first air outlet device is turned off.

8. The automatic adjustment method according to claim 7, characterized in that: When the temperature in the ash bin is lower than the temperature setting value and / or the humidity is higher than the humidity setting value, the second air outlet device is turned on first, and then the air inlet heating device is turned on.

9. The automatic adjustment method according to claim 8, characterized in that: After the air inlet heating device is turned on, the first air outlet device is turned off with a delay.

10. The automatic adjustment method according to claim 7, characterized in that: When the temperature in the ash bin is lower than the temperature setting value and / or the humidity is higher than the humidity setting value, the flow rate of the second air outlet device is adjusted according to the pressure condition in the ash bin to ensure that negative pressure is maintained in the ash bin.

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