An intelligent sludge drying treatment system

Abstract

The present invention relates to the technical field of sludge treatment, and in particular to an intelligent sludge drying treatment system, comprising: a sludge drying module for drying wet sludge to output dry sludge and gas; a waste gas treatment module, comprising a waste gas collection unit for collecting waste gas in the sludge; an energy supply module, which is respectively connected to the sludge drying module and the waste gas treatment module, for supplying energy to the sludge drying treatment process; a detection module, which is respectively connected to the sludge drying module and the waste gas treatment module, for detecting the operating parameters of the sludge drying treatment process; a control module, which is respectively connected to the sludge drying module, the waste gas treatment module, the energy supply module and the detection module, for determining the heating power of the biomass energy boiler according to the variance of the vibration intensity of the turbo thin layer dryer. The present invention improves the stability of sludge drying treatment.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge treatment, and in particular to an intelligent sludge drying treatment system. Background Art

[0002] In the prior art, the sludge produced by urban sewage treatment plants when treating industrial wastewater and domestic sewage contains, in addition to inorganic components in the form of minerals, a large amount of refractory organic pollutants and a variety of heavy metal elements. This type of sludge is usually called urban sludge. Since urban sludge has a high water content, a large amount, and is enriched with high concentrations of pollutants, if it cannot be properly treated or disposed of, it will not only directly affect the normal operation of urban sewage treatment plants, but more importantly, it will cause serious secondary pollution to the environment. Therefore, how to safely, economically and effectively treat urban sludge is a common problem faced by environmental protection departments at home and abroad.

[0003] Chinese Patent Publication No.: CN104140188A discloses an energy-saving sewage sludge harmless treatment method, comprising the following steps: 1) the sludge in the sludge freezing container is continuously frozen by a freeze-drying energy circulation system, and the sludge is thawed after continuous freezing, and the freezing and thawing are repeated multiple times. This step is based on a drying device and a freeze-drying energy circulation system. The freeze-drying energy circulation system comprises a compressor, an evaporator, a condenser and a first heat exchanger arranged in the sludge freezing container. The air outlet of the compressor is connected to the condenser, the condenser is connected to the evaporator via a throttling element, and the evaporator is connected to the air inlet of the compressor via the first heat exchanger; the condenser passes through the condenser. The bottom of the drying device is connected through a gas pipeline, the evaporator is connected through a gas pipeline to the top of the drying device, and the condenser is connected to the evaporator through a gas pipeline; 2) the sludge after the freeze-thaw treatment is dehydrated in the filter press device, which is divided into a filter press stage and a press dehydration stage, so that the sludge is filtered into large cake-like sludge with low moisture content; 3) the large cake-like sludge is crushed in a crushing device to form small sludge particles; 4) the crushed sludge particles are transported to the sludge drying device for drying, and the freeze-drying energy circulation system releases heat through the condenser, transfers the heat to the air, and the hot air enters the sludge drying device to dry the sludge particles. It can be seen that the energy-saving sewage sludge harmless treatment method has the problem that the turbine blades of the dryer are in direct contact with the material during high-speed rotation, the hard particles in the material will cause wear on the blade surface, and long-term friction may cause gaps in the blades, thereby causing the stability of the sludge drying process to decrease. Summary of the invention

[0004] To this end, the present invention provides an intelligent sludge drying treatment system to overcome the problem in the prior art that due to the direct contact between the turbine blades of the dryer and the material during high-speed rotation, the hard particles in the material will cause wear on the blade surface, and long-term friction may cause gaps in the blades, thereby reducing the stability of the sludge drying treatment.

[0005] To achieve the above-mentioned purpose, the present invention provides an intelligent sludge drying treatment system, comprising: a sludge drying module, used for drying wet sludge to output dry sludge and gas, including a drying unit for drying wet sludge and a gas dust removal unit for performing dust removal operations on the gas, wherein the drying unit includes a turbine thin-layer dryer for drying wet sludge, and the gas dust removal unit includes a dust collector for dust removal on the gas; an exhaust gas treatment module, which is connected to the sludge drying module, and includes an exhaust gas collection unit for collecting exhaust gas in the sludge, wherein the exhaust gas collection unit includes an exhaust gas collection pipe for conveying exhaust gas and a centrifugal fan connected to the exhaust gas collection pipe for providing collection power; an energy supply module, which is respectively connected to the sludge drying module and The exhaust gas treatment module is connected to supply energy to the sludge drying process, including a biomass boiler connected to the turbo thin layer dryer to heat the turbo thin layer dryer; a detection module, which is respectively connected to the sludge drying module and the exhaust gas treatment module, to detect the operating parameters of the sludge drying process; a control module, which is respectively connected to the sludge drying module, the exhaust gas treatment module, the energy supply module and the detection module, to determine the heating power of the biomass boiler according to the variance of the vibration intensity of the turbo thin layer dryer, or to determine the ventilation volume inside the dust collector according to the difference in the number of particles at the inlet and outlet of the dust collector, and to determine the speed of the centrifugal fan according to the difference in the number of particles at the inlet and outlet of the dust collector and the gas pressure difference at both ends of the exhaust gas collection pipe.

[0006] Furthermore, the sludge drying module also includes:

[0007] A conveying unit, used for conveying the wet sludge to the drying unit;

[0008] The solid-gas separation unit is connected to the drying unit and is used for performing solid-gas separation on the dried sludge to output the dry sludge and the gas.

[0009] Furthermore, the exhaust gas treatment module further includes:

[0010] an exhaust gas condensing unit, connected to the exhaust gas collecting unit, for cooling the exhaust gas;

[0011] The exhaust gas discharge unit is connected to the exhaust gas condensation unit and is used for discharging the cooled exhaust gas.

[0012] Furthermore, the energy supply module also includes an air compressor for cleaning dust.

[0013] Furthermore, the detection module includes:

[0014] a vibration sensor connected to the turbo thin layer dryer to detect the vibration intensity of the turbo thin layer dryer;

[0015] a first particle counter connected to the inlet of the dust collector and used to detect the number of particles in the gas at the inlet of the dust collector;

[0016] a second particle counter connected to the outlet of the dust collector and used to detect the number of particles in the gas at the outlet of the dust collector;

[0017] a first pressure sensor connected to the inlet of the exhaust gas collecting pipe and used to detect the gas pressure at the inlet of the exhaust gas collecting pipe;

[0018] The second pressure sensor is connected to the outlet of the exhaust gas collecting pipe and is used to detect the gas pressure at the outlet of the exhaust gas collecting pipe.

[0019] Further, the control module is used to determine whether the stability of the sludge drying process meets the requirements according to the variance of the vibration intensity of the turbo thin layer dryer. If the variance of the vibration intensity of the turbo thin layer dryer is greater than a preset first variance, it is determined that the stability of the sludge drying process does not meet the requirements.

[0020] The control module is used to preliminarily determine that the environmental protection of the sludge drying treatment does not meet the requirements when the variance of the vibration intensity of the turbo thin-layer dryer is greater than the preset first variance and less than or equal to the preset second variance, and to determine whether the environmental protection of the sludge drying treatment meets the requirements based on the difference in the number of particles at the inlet and outlet of the dust collector.

[0021] Further, the control module is used to increase the heating power of the biomass boiler when the variance of the vibration intensity of the turbo thin layer dryer is greater than the preset second variance;

[0022] The increase range of the heating power of the biomass boiler is determined by the difference between the variance of the vibration intensity of the turbo thin layer dryer and a preset second variance.

[0023] Further, the control module is used to determine whether the environmental protection of the sludge drying treatment meets the requirements according to the difference in the number of particles at the inlet and outlet of the dust collector. If the difference in the number of particles at the inlet and outlet of the dust collector is less than or equal to a preset second difference, it is determined that the environmental protection of the sludge drying treatment does not meet the requirements;

[0024] The control module is used to preliminarily determine that the effectiveness of waste gas treatment by sludge drying does not meet the requirements when the difference in the number of particles at the inlet and outlet of the dust collector is less than or equal to a preset first difference, and to determine whether the effectiveness of waste gas treatment by sludge drying meets the requirements based on the gas pressure difference at both ends of the waste gas collection pipe.

[0025] Furthermore, the control module is used to reduce the ventilation volume inside the dust collector when the difference in the number of particles at the inlet and outlet of the dust collector is greater than the preset first difference and less than or equal to the preset second difference;

[0026] The reduction range of the ventilation volume inside the dust collector is determined by the difference between the difference in the number of particles at the inlet and outlet of the dust collector and a preset first difference.

[0027] Furthermore, the control module is used to determine whether the effectiveness of waste gas treatment of sludge drying meets the requirements according to the gas pressure difference at both ends of the waste gas collection pipe. If the gas pressure difference at both ends of the waste gas collection pipe is greater than the preset pressure difference, it is determined that the effectiveness of waste gas treatment of sludge drying does not meet the requirements, and the speed of the centrifugal fan is increased;

[0028] Wherein, the increase range of the rotation speed of the centrifugal fan is determined by the difference between the gas pressure difference at both ends of the exhaust gas collection pipe and the preset pressure difference.

[0029] Compared with the prior art, the beneficial effect of the present invention lies in that the system of the present invention determines the heating power of the biomass boiler according to the variance of the vibration intensity of the turbine thin-layer dryer by setting a sludge drying module, an exhaust gas treatment module, an energy supply module, a detection module and a control module. Since the turbine blades of the dryer are in direct contact with the material during high-speed rotation, the hard particles in the material will cause wear on the blade surface. Long-term friction may cause the blade edge to become thinner and have gaps, affecting its stirring and dispersing effect on the material. By increasing the heating power of the biomass boiler, the overall temperature in the dryer can be increased, providing more heat for the material, so that the material that is not fully stirred and insufficiently heated can also obtain sufficient energy to evaporate water. The ventilation volume inside the dust collector is determined according to the difference in the number of particles at the inlet and outlet of the dust collector. When the drying temperature is too high, the originally larger sludge particles may be excessively broken, resulting in More fine dust particles are more difficult to be captured by the dust collector, and are easy to follow the airflow through the dust collector without being intercepted. By reducing the ventilation volume inside the dust collector, the gas flow rate can be reduced, the residence time of dust in the dust collector can be prolonged, and the dust concentration per unit volume can be relatively increased, which is beneficial to increase the probability of interaction between dust and various capture mechanisms inside the dust collector, thereby improving the dust removal efficiency. The speed of the centrifugal fan is determined according to the gas pressure difference at both ends of the exhaust gas collection pipe. Due to the high dust humidity in the exhaust gas generated by sludge drying, the dust particles are easy to stick to each other and adhere to the inner wall of the pipe. As time goes by, dust continues to accumulate and gradually blocks the pipe, resulting in incomplete treatment of the exhaust gas. By increasing the speed of the centrifugal fan, the gas flow rate in the pipe can be increased, so that the dust that has been attached to the inner wall of the pipe is entrained by the airflow again, preventing further accumulation of dust and improving the stability of the sludge drying treatment.

[0030] Furthermore, the system of the present invention determines the heating power of the biomass boiler by setting a preset first variance and a preset second variance. Since the turbine blades of the dryer are in direct contact with the material during high-speed rotation, the hard particles in the material will cause wear on the blade surface. Long-term friction may cause the blade edges to become thinner and gaps to appear, affecting the stirring and dispersion effects of the material. By increasing the heating power of the biomass boiler, the overall temperature in the dryer can be increased, providing more heat for the material, so that the material that is not fully stirred and insufficiently heated can also obtain sufficient energy to evaporate water, further improving the stability of the sludge drying process.

[0031] Furthermore, the system of the present invention determines the ventilation volume inside the dust collector by setting a preset first difference and a preset second difference. When the drying temperature is too high, the originally larger sludge particles may be over-broken, resulting in more fine dust particles that are more difficult to be captured by the dust collector and are likely to follow the airflow through the dust collector without being intercepted. By reducing the ventilation volume inside the dust collector, the gas flow rate can be reduced, thereby prolonging the residence time of the dust in the dust collector and relatively increasing the dust concentration per unit volume, which is beneficial to increase the probability of interaction between the dust and various capture mechanisms inside the dust collector, thereby improving the dust removal efficiency and further improving the stability of the sludge drying process.

[0032] Furthermore, the system of the present invention determines the rotation speed of the centrifugal fan by setting a preset pressure difference. Since the dust humidity in the exhaust gas generated by sludge drying is relatively high, the dust particles are easily adhered to each other and attached to the inner wall of the pipe. As time goes by, dust continues to accumulate and gradually clogs the pipe, resulting in incomplete treatment of the exhaust gas. By increasing the rotation speed of the centrifugal fan, the gas flow rate in the pipe can be increased, so that the dust that has been attached to the inner wall of the pipe can be re-entrained by the airflow, preventing further accumulation of dust, thereby further improving the stability of the sludge drying treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the overall structure of the intelligent sludge drying treatment system according to an embodiment of the present invention;

[0034] Figure 2 This is an overall structural diagram of the intelligent sludge drying treatment system according to an embodiment of the present invention;

[0035] Figure 3 It is a logic flow chart of the intelligent sludge drying treatment system according to an embodiment of the present invention;

[0036] Figure 4 This is a specific structural block diagram of a sludge drying module of an intelligent sludge drying treatment system according to an embodiment of the present invention;

[0037] The accompanying drawings are marked as follows: 1-receiving bin, 2-gas circulation pipeline, 3-circulating fan, 4-first pressure sensor, 5-exhaust gas collection pipeline, 6-second particle counter, 7-second pressure sensor, 8-circulating pump, 9-cooling water circulation pipeline, 10-cooling tower, 11-discharge pipeline, 12-dust collector, 13-first particle counter, 14-first conveying pipeline, 15-air compressor, 16-gas outlet, 17-rotary separator, 18-rotary valve, 19-screw conveyor, 20-second conveying pipeline, 21-vibration sensor, 22-turbo thin layer dryer, 23-biomass boiler, 24-feeder, 25-chain conveyor, 26-centrifugal fan. DETAILED DESCRIPTION

[0038] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0039] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0040] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0041] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] See also Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, they are respectively an overall structural schematic diagram, an overall structural block diagram, a logic flow chart and a specific structural block diagram of a sludge drying module of an intelligent sludge drying treatment system according to an embodiment of the present invention. An intelligent sludge drying treatment system according to the present invention comprises:

[0043] A sludge drying module, used for drying wet sludge to output dry sludge and gas, comprising a drying unit for drying wet sludge and a gas dust removal unit for dust removal on the gas, wherein the drying unit comprises a turbo thin-layer dryer 22 for drying wet sludge, and the gas dust removal unit comprises a dust collector 12 for dust removal on the gas;

[0044] A waste gas treatment module, which is connected to the sludge drying module, and includes a waste gas collection unit for collecting waste gas in the sludge, wherein the waste gas collection unit includes a waste gas collection pipe 5 for conveying waste gas and a centrifugal fan 26 connected to the waste gas collection pipe 5 for providing collection power;

[0045] An energy supply module, which is respectively connected to the sludge drying module and the exhaust gas treatment module, for supplying energy to the sludge drying process, including a biomass energy boiler 23 connected to the turbo thin layer dryer 22 for heating the turbo thin layer dryer 22;

[0046] A detection module, which is connected to the sludge drying module and the waste gas treatment module respectively, and is used to detect the operating parameters of the sludge drying treatment process;

[0047] The control module is respectively connected to the sludge drying module, the exhaust gas treatment module, the energy supply module and the detection module, and is used to determine the heating power of the biomass boiler 23 according to the variance of the vibration intensity of the turbo thin layer dryer 22, or to determine the ventilation volume inside the dust collector 12 according to the difference in the number of particles at the inlet and outlet of the dust collector 12, and to determine the rotation speed of the centrifugal fan 26 according to the difference in the number of particles at the inlet and outlet of the dust collector 12 and the gas pressure difference at both ends of the exhaust gas collection pipe 5.

[0048] Specifically, the drying unit further includes a feeder 24 disposed at the input end of the turbo thin layer dryer 22 for feeding the wet sludge into the turbo thin layer dryer 22 .

[0049] Specifically, the gas dust removal unit also includes:

[0050] A first conveying pipeline 14, which is arranged at the input end of the dust collector 12 and is used to convey the gas to the dust collector 12;

[0051] A gas circulation pipeline 2, which is connected to the dust collector 12 and is used to transport the dust-removed gas to the input end of the turbo thin-layer dryer 22;

[0052] The circulating fan 3 is connected to the gas circulation pipeline 2 and is used to provide conveying power for the gas after dust removal.

[0053] Specifically, the gases include organic waste gas, acid gas, and ammonia.

[0054] Specifically, the operating parameters of the sludge drying process include the vibration intensity of the turbo thin-layer dryer 22 , the number of particles at the inlet of the dust collector 12 , the number of particles at the outlet of the dust collector 12 , and the gas pressure of the exhaust gas collection pipe 5 .

[0055] In practice, the system of the present invention determines the heating power of the biomass boiler 23 according to the variance of the vibration intensity of the turbine thin-layer dryer 22 by setting a sludge drying module, an exhaust gas treatment module, an energy supply module, a detection module and a control module. Since the turbine blades of the dryer are in direct contact with the material during high-speed rotation, the hard particles in the material will cause wear on the blade surface. Long-term friction may cause the blade edge to become thinner and have gaps, affecting its stirring and dispersing effect on the material. By increasing the heating power of the biomass boiler 23, the overall temperature in the dryer can be increased, providing more heat for the material, so that the material that is not fully stirred and insufficiently heated can also obtain sufficient energy to evaporate water. The ventilation volume inside the dust collector 12 is determined according to the difference in the number of particles at the inlet and outlet of the dust collector 12. When the drying temperature is too high, the originally larger sludge particles may be over-broken, resulting in more fine dust particles, which is more It is difficult to be captured by the dust collector 12, and it is easy to follow the airflow through the dust collector 12 without being intercepted. By reducing the ventilation volume inside the dust collector 12, the gas flow rate can be reduced, so that the residence time of the dust in the dust collector 12 is prolonged, and the dust concentration per unit volume is relatively increased, which is beneficial to increase the probability of interaction between the dust and various capture mechanisms inside the dust collector 12, thereby improving the dust removal efficiency. The rotation speed of the centrifugal fan 26 is determined according to the gas pressure difference at both ends of the exhaust gas collection pipe 5. Since the dust humidity in the exhaust gas generated by sludge drying is relatively high, the dust particles are easy to stick to each other and adhere to the inner wall of the pipe. As time goes by, dust continues to accumulate and gradually blocks the pipe, resulting in incomplete treatment of the exhaust gas. By increasing the rotation speed of the centrifugal fan 26, the gas flow rate in the pipe can be increased, so that the dust that has been attached to the inner wall of the pipe is entrained by the airflow again, preventing further accumulation of dust and improving the stability of the sludge drying treatment.

[0056] Specifically, the sludge drying module also includes:

[0057] A conveying unit, used for conveying the wet sludge to the drying unit;

[0058] The solid-gas separation unit is connected to the drying unit and is used for performing solid-gas separation on the dried sludge to output the dry sludge and the gas.

[0059] Specifically, the conveying unit includes:

[0060] A collecting bin 1 for collecting wet sludge;

[0061] The chain conveyor 25 is connected to the receiving bin 1 and is used to convey the wet sludge to the feeder 24 .

[0062] Specifically, the solid-gas separation unit includes:

[0063] A second conveying pipeline 20, which is connected to the turbo thin-layer dryer 22, and is used to convey the dried sludge to a solid-gas separation position;

[0064] a cyclone separator connected to the second conveying pipeline 20, for separating the dried sludge into dry sludge and gas;

[0065] a gas outlet 16, which is arranged at the top of the cyclone separator to discharge gas;

[0066] A rotary valve 18, which is arranged at the bottom of the cyclone separator to discharge dry sludge;

[0067] The screw conveyor 19 is connected to the rotary valve 18 and is used to convey the dry sludge to the granulation position.

[0068] Specifically, the exhaust gas treatment module also includes:

[0069] an exhaust gas condensing unit, connected to the exhaust gas collecting unit, for cooling the exhaust gas;

[0070] The exhaust gas discharge unit is connected to the exhaust gas condensation unit and is used for discharging the cooled exhaust gas.

[0071] Specifically, the exhaust gas condensation unit includes:

[0072] A cooling tower 10, which is connected to the exhaust gas collection pipe 5, and is used to condense the collected exhaust gas;

[0073] A cooling water circulation pipeline 9, which is connected to the cooling tower 10 and is used to transport cooling water;

[0074] A circulation pump 8 is connected to the cooling water circulation pipeline 9 to control the delivery rate of the cooling water.

[0075] Specifically, the exhaust gas discharge unit is an exhaust pipe 11 connected to the cooling tower 10 for discharging the exhaust gas to the outside.

[0076] Specifically, the energy supply module further includes an air compressor 15 for cleaning dust.

[0077] Specifically, the detection module includes:

[0078] A vibration sensor 21, which is connected to the turbo thin layer dryer 22 and is used to detect the vibration intensity of the turbo thin layer dryer 22;

[0079] A first particle counter 13, which is connected to the inlet of the dust collector 12 and is used to detect the number of particles in the gas at the inlet of the dust collector 12;

[0080] A second particle counter 6, which is connected to the outlet of the dust collector 12 and is used to detect the number of particles in the gas at the outlet of the dust collector 12;

[0081] a first pressure sensor 4, which is connected to the inlet of the exhaust gas collecting pipe 5 and is used to detect the gas pressure at the inlet of the exhaust gas collecting pipe 5;

[0082] The second pressure sensor 7 is connected to the outlet of the exhaust gas collecting pipe 5 and is used to detect the gas pressure at the outlet of the exhaust gas collecting pipe 5 .

[0083] Specifically, the control module is used to obtain the vibration intensity of the turbo thin layer dryer 22 in several processing cycles, and calculate the variance of the vibration intensity of the turbo thin layer dryer 22. If the variance of the vibration intensity of the turbo thin layer dryer 22 is greater than a preset first variance, it is determined that the stability of the sludge drying process does not meet the requirements;

[0084] The control module is used to preliminarily determine that the environmental protection of the sludge drying treatment does not meet the requirements when the variance of the vibration intensity of the turbo thin-layer dryer 22 is greater than the preset first variance and less than or equal to the preset second variance, and to determine whether the environmental protection of the sludge drying treatment meets the requirements based on the difference in the number of particles at the inlet and outlet of the dust collector 12.

[0085] It can be understood that the three intervals corresponding to the preset first variance and the preset second variance correspond to three situations respectively:

[0086] The first interval is when the variance of the vibration intensity of the turbo thin-layer dryer 22 is less than or equal to the preset first variance, corresponding to the situation where the stability of the sludge drying process meets the requirements;

[0087] The second interval is when the variance of the vibration intensity of the turbo thin layer dryer 22 is greater than the preset first variance and less than or equal to the preset second variance, which corresponds to the situation that when the drying temperature is too high, the originally large sludge particles may be excessively broken, resulting in more fine dust particles, which are more difficult to be captured by the dust collector 12 and are easy to follow the airflow through the dust collector 12 without being intercepted;

[0088] The third interval is when the variance of the vibration intensity of the turbine thin-layer dryer 22 is greater than the preset second variance. The turbine blades of the corresponding dryer are in direct contact with the material during high-speed rotation. The hard particles in the material will cause wear on the surface of the blades. Long-term friction may cause the edges of the blades to become thinner and gaps to appear, affecting the stirring and dispersion effects on the materials.

[0089] In practice, the preset first variance is generally selected in the range of [0.25 (m / s 2 ) 2 , 0.35 (m / s 2 )2 ], the preset second variance is generally selected in the range of [0.45 (m / s 2 ) 2 , 0.55 (m / s 2 ) 2 ].

[0090] Preferably, the preferred embodiment of the preset first variance is 0.3 (m / s 2 ) 2 The preferred embodiment of the preset second variance is 0.5 (m / s 2 ) 2 .

[0091] Specifically, the variance of the vibration intensity of the turbo thin layer dryer 22 is the variance of the vibration intensity of the turbo thin layer dryer 22 within several processing cycles. The calculation method of the variance of the vibration intensity of the turbo thin layer dryer 22 is a conventional technical means well known to those skilled in the art. Therefore, the calculation process of the variance of the vibration intensity of the turbo thin layer dryer 22 will not be repeated here.

[0092] In implementation, the system of the present invention determines the stability of the sludge drying treatment by setting a preset first variance and a preset second variance, thereby reducing the impact of the reduced accuracy of the sludge drying treatment due to inaccurate determination of the stability of the sludge drying treatment, and further improving the stability of the sludge drying treatment.

[0093] Specifically, the control module is used to increase the heating power of the biomass boiler 23 when the variance of the vibration intensity of the turbo thin layer dryer 22 is greater than the preset second variance;

[0094] The increase range of the heating power of the biomass boiler 23 is determined by the difference between the variance of the vibration intensity of the turbo thin layer dryer 22 and a preset second variance.

[0095] Specifically, the difference between the variance of the vibration intensity of the turbo thin layer dryer 22 and the preset second variance is within 0.05 (m / s 2 ) 2 When the difference between the variance of the vibration intensity of the turbo thin layer dryer 22 and the preset second variance exceeds 0.05 (m / s 2 ) 2 When it exceeds 0.02 (m / s 2 ) 2 , the heating power of the biomass boiler 23 increases by 150KW. For example, the difference between the variance of the vibration intensity of the turbo thin layer dryer 22 and the preset second variance is 0.09 (m / s 2 ) 2The current heating power of the biomass boiler 23 is 300KW, and the increased heating power of the biomass boiler 23 is 300×1.1+150×2=630KW.

[0096] In implementation, the system of the present invention determines the heating power of the biomass boiler 23 by setting a preset first variance and a preset second variance. Since the turbine blades of the dryer are in direct contact with the material during high-speed rotation, the hard particles in the material will cause wear on the blade surface. Long-term friction may cause the blade edge to become thinner and have gaps, affecting its stirring and dispersing effect on the material. By increasing the heating power of the biomass boiler 23, the overall temperature in the dryer can be increased, providing more heat for the material, so that the material that is not fully stirred and insufficiently heated can also obtain sufficient energy to evaporate water, further improving the stability of the sludge drying process.

[0097] Specifically, the control module is used to obtain the difference between the number of particles at the outlet of the dust collector 12 and the number of particles at the inlet of the dust collector 12, and calculate the difference in the number of particles at the inlet and outlet of the dust collector 12. If the difference in the number of particles at the inlet and outlet of the dust collector 12 is less than or equal to a preset second difference, it is determined that the environmental protection of the sludge drying treatment does not meet the requirements;

[0098] The control module is used to preliminarily determine that the effectiveness of waste gas treatment by sludge drying does not meet the requirements when the difference in the number of particles at the inlet and outlet of the dust collector 12 is less than or equal to a preset first difference, and to determine whether the effectiveness of waste gas treatment by sludge drying meets the requirements based on the gas pressure difference at both ends of the waste gas collection pipe 5.

[0099] It can be understood that the three intervals corresponding to the preset first difference amount and the preset second difference amount correspond to three situations respectively:

[0100] The first interval is when the difference in the number of particles at the inlet and outlet of the dust collector 12 is less than or equal to the preset first difference, corresponding to the high dust humidity in the tail gas generated by sludge drying, which makes it easy for dust particles to stick to each other and adhere to the inner wall of the pipe. As time goes by, dust accumulates and gradually blocks the pipe, resulting in incomplete treatment of the exhaust gas.

[0101] The second interval is when the difference in the number of particles at the inlet and outlet of the dust collector 12 is greater than the preset first difference and less than or equal to the preset second difference. When the drying temperature is too high, the originally larger sludge particles may be over-broken, resulting in more fine dust particles that are more difficult to be captured by the dust collector 12 and are likely to follow the airflow through the dust collector 12 without being intercepted.

[0102] The third interval is when the difference in the number of particles at the inlet and outlet of the dust collector 12 is greater than the preset second difference, corresponding to the situation where the environmental protection of the sludge drying treatment meets the requirements.

[0103] In practice, the preset first difference amount is generally selected in the range of [1800 pieces / cubic meter, 2200 pieces / cubic meter], and the preset second difference amount is generally selected in the range of [2300 pieces / cubic meter, 2700 pieces / cubic meter].

[0104] Preferably, the preferred embodiment of the preset first difference amount is 2000 pieces / cubic meter, and the preferred embodiment of the preset second difference amount is 2500 pieces / cubic meter.

[0105] Specifically, the difference in the number of particles at the inlet and outlet of the dust collector 12 is the absolute value of the difference between the number of particles at the outlet of the dust collector 12 and the number of particles at the inlet of the dust collector 12 .

[0106] During implementation, the system of the present invention determines the environmental friendliness of the sludge drying treatment by setting a preset first difference amount and a preset second difference amount, thereby reducing the impact of the decreased stability of the sludge drying treatment due to inaccurate determination of the environmental friendliness of the sludge drying treatment, and further improving the stability of the sludge drying treatment.

[0107] Specifically, the control module is used to reduce the ventilation volume inside the dust collector 12 when the difference in the number of particles at the inlet and outlet of the dust collector 12 is greater than the preset first difference and less than or equal to the preset second difference;

[0108] The reduction range of the ventilation volume inside the dust collector 12 is determined by the difference between the difference in the number of particles at the inlet and outlet of the dust collector 12 and a preset first difference.

[0109] Specifically, when the difference between the number of particles at the inlet and outlet of the dust collector 12 and the preset first difference is within 500 particles / m3, the ventilation volume inside the dust collector 12 is reduced to 0.9 times the original value; when the difference between the number of particles at the inlet and outlet of the dust collector 12 and the preset first difference exceeds 500 particles / m3, the ventilation volume inside the dust collector 12 is reduced by 200m3 for every 200 particles / m3 exceeding the preset first difference. 3 / h, for example, the difference between the number of particles at the inlet and outlet of the dust collector 12 and the preset first difference is 900 particles / m3, and the current ventilation volume inside the dust collector 12 is 3000m 3 / h, the reduced ventilation volume inside the dust collector 12 is 3000×0.9-200×2=2300m 3 / h.

[0110] In implementation, the system of the present invention determines the ventilation volume inside the dust collector 12 by setting a preset first difference and a preset second difference. When the drying temperature is too high, the originally larger sludge particles may be over-broken, resulting in more fine dust particles that are more difficult to be captured by the dust collector 12 and are likely to follow the airflow through the dust collector 12 without being intercepted. By reducing the ventilation volume inside the dust collector 12, the gas flow rate can be reduced, and the residence time of dust in the dust collector 12 can be prolonged. The dust concentration per unit volume can also be relatively increased, which is beneficial to increase the probability of interaction between dust and various capture mechanisms inside the dust collector 12, thereby improving the dust removal efficiency and further improving the stability of the sludge drying process.

[0111] Specifically, the control module is used to obtain the gas pressure at the outlet of the waste gas collection pipe 5 and the gas pressure at the inlet of the waste gas collection pipe 5 respectively, and calculate the gas pressure difference at both ends of the waste gas collection pipe 5. If the gas pressure difference at both ends of the waste gas collection pipe 5 is greater than the preset pressure difference, it is determined that the effectiveness of the waste gas treatment of the sludge drying does not meet the requirements, and the speed of the centrifugal fan 26 is increased.

[0112] It can be understood that the two intervals corresponding to the preset pressure difference correspond to two situations:

[0113] The first interval is when the gas pressure difference at both ends of the waste gas collection pipe 5 is less than or equal to the preset pressure difference, corresponding to the situation where the waste gas treatment effectiveness of the sludge drying meets the requirements;

[0114] The second interval is when the gas pressure difference at both ends of the waste gas collection pipe 5 is greater than the preset pressure difference, corresponding to the high dust humidity in the exhaust gas generated by sludge drying, which makes it easy for dust particles to stick to each other and adhere to the inner wall of the pipe. As time goes by, dust continues to accumulate and gradually clogs the pipe, resulting in incomplete treatment of the waste gas.

[0115] In practice, the preset pressure difference is generally selected in the range of [800Pa, 1200Pa].

[0116] Preferably, the preset pressure difference is 1000Pa.

[0117] Specifically, the gas pressure difference at both ends of the exhaust gas collecting pipe 5 is the absolute value of the difference between the gas pressure at the outlet of the exhaust gas collecting pipe 5 and the gas pressure at the inlet of the exhaust gas collecting pipe 5 .

[0118] During implementation, the system of the present invention determines the effectiveness of waste gas treatment of sludge drying by setting a preset pressure difference, thereby reducing the impact of decreased stability of sludge drying treatment due to inaccurate determination of the effectiveness of waste gas treatment of sludge drying, and further improving the stability of sludge drying treatment.

[0119] Specifically, the increase range of the rotation speed of the centrifugal fan 26 is determined by the difference between the gas pressure difference at both ends of the exhaust gas collecting pipe 5 and the preset pressure difference.

[0120] Specifically, when the difference between the gas pressure difference at both ends of the exhaust gas collection pipe 5 and the preset pressure difference is within 200Pa, the rotation speed of the centrifugal fan 26 increases to 1.2 times the original; when the difference between the gas pressure difference at both ends of the exhaust gas collection pipe 5 and the preset pressure difference exceeds 200Pa, the rotation speed of the centrifugal fan 26 increases by 300r / min for every 100Pa exceeding. For example, the difference between the gas pressure difference at both ends of the exhaust gas collection pipe 5 and the preset pressure difference is 400Pa, the current rotation speed of the centrifugal fan 26 is 1500r / min, and the increased rotation speed of the centrifugal fan 26 is 1500×1.2+300×2=2400r / min.

[0121] In practice, the system of the present invention determines the rotation speed of the centrifugal fan 26 by setting a preset pressure difference. Since the dust humidity in the exhaust gas generated by sludge drying is relatively high, the dust particles are easily adhered to each other and attached to the inner wall of the pipe. As time goes by, dust continues to accumulate and gradually clogs the pipe, resulting in incomplete treatment of the exhaust gas. By increasing the rotation speed of the centrifugal fan 26, the gas flow rate in the pipe can be increased, so that the dust that has been attached to the inner wall of the pipe can be re-entrained by the airflow, preventing further accumulation of dust, and further improving the stability of the sludge drying treatment.

[0122] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An intelligent sludge drying treatment system, characterized in that: include: A sludge drying module, used for drying wet sludge to output dry sludge and gas, comprising a drying unit for drying wet sludge and a gas dust removal unit for performing dust removal operations on the gas, wherein the drying unit comprises a turbo thin-layer dryer for drying wet sludge, and the gas dust removal unit comprises a dust collector for dust removal on the gas; A waste gas treatment module, which is connected to the sludge drying module, and includes a waste gas collection unit for collecting waste gas in the sludge, wherein the waste gas collection unit includes a waste gas collection pipe for conveying waste gas and a centrifugal fan connected to the waste gas collection pipe for providing collection power; An energy supply module, which is respectively connected to the sludge drying module and the exhaust gas treatment module, for supplying energy to the sludge drying process, including a biomass energy boiler connected to the turbo thin layer dryer for heating the turbo thin layer dryer; A detection module, which is connected to the sludge drying module and the waste gas treatment module respectively, and is used to detect the operating parameters of the sludge drying treatment process; a control module, which is respectively connected to the sludge drying module, the exhaust gas treatment module, the energy supply module and the detection module, and is used to determine the heating power of the biomass boiler according to the variance of the vibration intensity of the turbo thin layer dryer, determine the ventilation volume inside the dust collector according to the difference in the number of particles at the inlet and outlet of the dust collector, and determine the rotation speed of the centrifugal fan according to the gas pressure difference at both ends of the exhaust gas collection pipe; The control module is used to determine whether the stability of the sludge drying process meets the requirements according to the variance of the vibration intensity of the turbo thin layer dryer. If the variance of the vibration intensity of the turbo thin layer dryer is greater than a preset first variance, it is determined that the stability of the sludge drying process does not meet the requirements; The control module is used to preliminarily determine that the environmental protection of the sludge drying treatment does not meet the requirements when the variance of the vibration intensity of the turbo thin layer dryer is greater than the preset first variance and less than or equal to the preset second variance, and determine whether the environmental protection of the sludge drying treatment meets the requirements according to the difference in the number of particles at the inlet and outlet of the dust collector; The control module is used to increase the heating power of the biomass boiler when the variance of the vibration intensity of the turbo thin layer dryer is greater than the preset second variance; The increase range of the heating power of the biomass boiler is determined by the difference between the variance of the vibration intensity of the turbo thin-layer dryer and a preset second variance; The control module is used to determine whether the environmental protection of the sludge drying treatment meets the requirements according to the difference in the number of particles at the inlet and outlet of the dust collector. If the difference in the number of particles at the inlet and outlet of the dust collector is less than or equal to a preset second difference, it is determined that the environmental protection of the sludge drying treatment does not meet the requirements; The control module is used to preliminarily determine that the waste gas treatment effectiveness of the sludge drying does not meet the requirements when the difference in the number of particles at the inlet and outlet of the dust collector is less than or equal to a preset first difference, and determine whether the waste gas treatment effectiveness of the sludge drying meets the requirements based on the gas pressure difference at both ends of the waste gas collection pipeline; The control module is used to reduce the ventilation volume inside the dust collector when the difference in the number of particles at the inlet and outlet of the dust collector is greater than the preset first difference and less than or equal to the preset second difference; The reduction range of the ventilation volume inside the dust collector is determined by the difference between the difference in the number of particles at the inlet and outlet of the dust collector and a preset first difference; The control module is used to determine whether the waste gas treatment effectiveness of the sludge drying meets the requirements according to the gas pressure difference at both ends of the waste gas collection pipe. If the gas pressure difference at both ends of the waste gas collection pipe is greater than the preset pressure difference, it is determined that the waste gas treatment effectiveness of the sludge drying does not meet the requirements, and the speed of the centrifugal fan is increased; Wherein, the increase range of the rotation speed of the centrifugal fan is determined by the difference between the gas pressure difference at both ends of the exhaust gas collection pipe and the preset pressure difference.

2. The intelligent sludge drying treatment system according to claim 1 is characterized in that: The sludge drying module also includes: A conveying unit, used for conveying the wet sludge to the drying unit; The solid-gas separation unit is connected to the drying unit and is used for performing solid-gas separation on the dried sludge to output the dry sludge and the gas.

3. The intelligent sludge drying treatment system according to claim 2 is characterized in that: The exhaust gas treatment module also includes: an exhaust gas condensing unit, connected to the exhaust gas collecting unit, for cooling the exhaust gas; The exhaust gas discharge unit is connected to the exhaust gas condensation unit and is used for discharging the cooled exhaust gas.

4. The intelligent sludge drying treatment system according to claim 3 is characterized in that: The energy supply module also includes an air compressor for cleaning dust.

5. The intelligent sludge drying treatment system according to claim 4 is characterized in that: The detection module comprises: a vibration sensor connected to the turbo thin layer dryer to detect the vibration intensity of the turbo thin layer dryer; a first particle counter connected to the inlet of the dust collector and used to detect the number of particles in the gas at the inlet of the dust collector; a second particle counter connected to the outlet of the dust collector and used to detect the number of particles in the gas at the outlet of the dust collector; a first pressure sensor connected to the inlet of the exhaust gas collecting pipe and used to detect the gas pressure at the inlet of the exhaust gas collecting pipe; The second pressure sensor is connected to the outlet of the exhaust gas collecting pipe and is used to detect the gas pressure at the outlet of the exhaust gas collecting pipe.

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