Intelligent environment-friendly asphalt mixing station

Abstract

The present application relates to a kind of intelligent environmental protection asphalt mixing station, comprising: main tower, main tower has metering layer, mixing cylinder, trolley layer and discharge port;Mechanical overflow bin, mechanical overflow bin is set in the front side of main tower;Aggregate bin, aggregate bin is set in one side of main tower, aggregate bin supplies aggregate to main tower;Dust recovery system, dust recovery system is connected to metering layer, mixing cylinder, mechanical overflow bin, aggregate bin and discharge port respectively to recover dust;Flue gas recovery system, flue gas recovery system is connected to trolley layer and discharge port respectively to recover flue gas.The asphalt mixing station of the present application can parallel all production and supporting auxiliary units in factory area into a whole, realize intelligent automatic production, and prevent dust and flue gas in all directions, improve environmental protection degree, belong to the technical field of asphalt mixing equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of asphalt mixing equipment, in particular to an intelligent environment-friendly asphalt mixing station. BACKGROUND

[0002] At present, the asphalt mixing station belongs to a "double-high" industry, i.e. high pollution and high energy consumption. In terms of environmental protection, a large amount of dust and asphalt fume pollution is generated in the production process of asphalt mixture. In terms of energy saving, in addition to the high energy consumption of the mixing station equipment itself, most of the stations currently lack high-level production personnel and automatic information management, and the technical level of the equipment is uneven, and there is a large amount of resource waste in part of the process flow. In addition, there are high-temperature asphalt tank areas, fuel areas, boiler special equipment areas or natural gas equipment areas in the asphalt production process equipment, and there is a lack of perfect management methods and management technical means, and there are obvious safety hazards. SUMMARY

[0003] In view of the technical problems existing in the prior art, the purpose of the present application is to provide an intelligent environment-friendly asphalt mixing station, which solves the problem of a large amount of dust and asphalt fume pollution generated in the production process of asphalt mixture in the asphalt mixing station, and realizes intelligent comprehensive management and control of the plant area.

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0005] An intelligent environment-friendly asphalt mixing station comprises:

[0006] a main tower, the main tower having a metering layer, a mixing cylinder, a trolley layer and a discharge port;

[0007] a mechanical overflow bin, the mechanical overflow bin being arranged at the front side of the main tower;

[0008] an aggregate bin, the aggregate bin being arranged at one side of the main tower, the aggregate bin supplying aggregate to the main tower;

[0009] a dust recovery system, the dust recovery system being connected to the metering layer, the mixing cylinder, the mechanical overflow bin, the aggregate bin and the discharge port respectively for recovering dust;

[0010] a fume recovery system, the fume recovery system being connected to the trolley layer and the discharge port respectively for recovering fume.

[0011] As a preferred, the dust recovery system comprises a first dust removal module and a second dust removal module, the first dust removal module being arranged at the metering layer and the mixing cylinder respectively, and the second dust removal module being arranged at the mechanical overflow bin, the discharge port and the bottom of the aggregate bin respectively.

[0012] As a preferred, the first dust removal module comprises a first dust remover, a first air duct, a second air duct and a dust collection air duct, the first air duct and the second air duct are connected with the metering layer and the stirring cylinder respectively; the first air duct and the second air duct are connected with the dust collection air duct, and the dust collection air duct is connected with the first dust remover.

[0013] As a preferred, the second dust removal module comprises a second dust remover, a third air duct, an air suction duct, a branch air duct and a second dust cover, two ends of the third air duct are connected with the second dust remover and the dust suction-smoke duct branch respectively, the dust suction-smoke duct branch is connected with the mechanical overflow bin, the dust suction-smoke duct branch is further connected with the first dust cover, and the first dust cover is arranged at the discharge port; one end of the second dust remover is connected with the air suction duct, the air suction duct is connected with the second dust cover through the branch air duct, and the second dust cover is located above the sinking hopper belt conveyor discharge port of the aggregate bin.

[0014] As a preferred, the smoke gas recovery system comprises a smoke gas purification device, a first smoke gas duct and a second smoke gas duct, two ends of the first smoke gas duct are connected with the trolley layer and the dust suction-smoke duct branch respectively; two ends of the second smoke gas duct are connected with the discharge port and the smoke gas purification device through the dust suction-smoke duct branch.

[0015] As a preferred, it further comprises a fuel supply system, a high-position drying roller and a low-position drying roller, the high-position drying roller is used for drying the asphalt reclaimed material, the low-position drying roller is used for drying the aggregate transported to the main tower from the aggregate bin, the fuel supply system comprises a fuel tank, a first oil pump, a second oil pump, a relay tank, a low-position oil supply pipe, a high-position oil supply pipe, a low-position oil return pipe, a high-position oil return pipe and an oil return main pipe, the first oil pump is connected with the fuel tank through a pipeline, the relay tank is connected with the first oil pump through a pipeline, the second oil pump is connected with the relay tank through a pipeline, and the second oil pump is connected with the low-position oil supply pipe and the high-position oil supply pipe respectively; the low-position drying roller and the high-position drying roller are respectively provided with a low-position burner and a high-position burner, the low-position oil supply pipe and the high-position oil supply pipe are connected with the low-position burner and the high-position burner respectively; the low-position oil return pipe and the high-position oil return pipe are connected with the low-position burner and the high-position burner respectively, the low-position oil return pipe and the high-position oil return pipe are both connected with the oil return main pipe, and the oil return main pipe is connected with the fuel tank.

[0016] As a preferred, it further comprises a boiler device, the boiler device is used for heating the heat-conducting oil; an asphalt tank area, the asphalt tank area is connected with the boiler device to heat the asphalt, and the asphalt tank area is connected with the main tower to supply the asphalt to the main tower and the aggregate mixing.

[0017] As a kind of preferred, asphalt tank area includes asphalt tank, asphalt pump and asphalt unloading pool, the number of asphalt pump is three, two asphalt pumps are connected with the inlet of asphalt tank, and are connected with asphalt unloading pool;The remaining asphalt pump is connected with the outlet of asphalt tank, as the matrix asphalt supply interface of asphalt tank and expansion asphalt tank connection or connection rubber asphalt equipment;Asphalt tank is also connected with pipeline interface, for supplying asphalt spraying vehicle;Boiler equipment heating conducting oil carries out conducting oil circulation heating to the asphalt in asphalt tank.

[0018] As a kind of preferred, boiler equipment includes oil tank, natural gas supply source, boiler burner, circulating pump, circulating conducting oil return pipe, boiler high oil tank and conducting oil circulation pipeline, oil tank and natural gas supply source are connected with boiler burner, circulating pump is connected with conducting oil circulation pipeline, conducting oil circulation pipeline is connected around asphalt tank, boiler burner heats conducting oil circulation pipeline, boiler high oil tank is connected with circulating conducting oil return pipe, and the connecting point is located before circulating pump.

[0019] As a kind of preferred, it further includes control system, and the control system includes controller;

[0020] First air duct and second air duct are each provided with a first electrically-controlled gate valve, and the controller controls the first air duct and the second air duct to be communicated or closed by controlling the first electrically-controlled gate valve;

[0021] The suction duct, the tapping duct and the discharge port of the second dust collector are each provided with a pneumatic flap door, and the controller controls the on-off of airflow in the suction duct and the tapping duct by controlling the pneumatic flap door, and controls the on-off of the discharge port of the second dust collector by controlling the pneumatic flap door;

[0022] The stirring cylinder and the drying roller are each provided with a negative pressure sensor, and the controller receives signals of the negative pressure sensor;

[0023] The conducting oil inlet of the asphalt tank is provided with an electrically-controlled gate valve, and the conducting oil outlet of the asphalt tank is provided with a manually-controlled gate valve, and the electrically-controlled gate valve is electrically connected with the controller to remotely control the on-off;

[0024] The inlet and the outlet of the asphalt tank are each provided with a pneumatic butterfly valve, and the pneumatic butterfly valve is connected with the controller to remotely control the on-off of the inlet and the outlet of the asphalt tank;

[0025] The asphalt tank is provided with a pressure liquid level sensor and a first temperature sensor, and the pressure liquid level sensor and the temperature sensor are electrically connected with the controller;

[0026] The boiler burner is provided with a flame sensor, and the flame sensor is connected with the controller;

[0027] The inlet and the outlet of the boiler burner are provided with a pressure sensor and a second temperature sensor, and the pressure sensor and the second temperature sensor are electrically connected with the controller;

[0028] The circulating pump is provided with an alarm, and the alarm is electrically connected with the controller.

[0029] Overall, the present application has the following advantages:

[0030] 1. The asphalt mixing station of the present application realizes all-round dust and smoke prevention by comprehensively preventing dust and smoke at the main dust and smoke generating parts in the production process, and improves the environmental protection level. The main tower connection is provided with a package to enhance the sealing effect, and the main tower is provided with an air duct through the metering layer and the mixing cylinder, and the negative pressure is controlled through the first dust collector to reduce the dust and smoke discharge. The trolley layer and the discharge port with more dust and smoke discharge are provided with a dust hood, corresponding dust and smoke suction air ducts and smoke ducts, which are finally connected to the second dust collector and the smoke purification equipment, respectively; the overflow of the main tower of the asphalt mixing station is stored in the mechanical overflow bin, which is used for storing the overflow discharged in the production process, and the whole link is in a closed space, without dust discharge, and the material occupation space is also saved. On the other hand, the present application can maintain the negative pressure of the metering layer and the mixing cylinder, reduce the pressure fluctuation in the measuring hopper caused by stone impact, improve the measurement accuracy, make the actual production mix more accurate, and ensure the product quality.

[0031] 2. In the production process of the asphalt mixing station of the present application, the dust generated by the transportation, falling and throwing of the aggregate in the tunnel during the conveying of the aggregate in the existing aggregate bin (ground sinking type aggregate bin) can be collected into the second dust collector through the dust hood and the air duct; the second dust collector can drop the collected dust to the belt conveying the aggregate. The air duct and the second dust hood are arranged in the ground sinking tunnel, and the dust is removed through the second dust collector, which can greatly reduce the dust in the underground tunnel during the production process, facilitate the emergency shutdown maintenance into the tunnel when similar problems such as conveying belt failure occur, and avoid the environmental problems caused by the dust accumulation in the tunnel ground. In addition, the collected dust is also a raw material stone powder that can be used for production, which can be directly put into the conveying belt through the second dust collector discharge port for production, thereby saving resources to a certain extent.

[0032] 3.The asphalt mixing station of the present application effectively improves the single-pump fuel supply system widely used at present, adopts an automatic control mode of constant pressure fuel supply, ensures the delivery power and increases the service life of the pump set.The two pump sets of the fuel supply system are connected to the controller, the fuel tank is pumped to the relay tank through the first oil pump, and then pumped to the low-position burner and the high-position burner through the second oil pump, which is used for heating the aggregate in the drying drum (low-position drying drum) or the asphalt regeneration material (high-position drying drum) by igniting the burner of the drying drum.The fuel tank is generally stored in the oil depot area, which is relatively far away from the drying drum, and the single-pump fuel delivery is generally used at present.However, as the production temperature changes, the fuel supply amount (oil pressure) of the burner of the drying drum will change, and the pumping pressure should also change, while the power of the single-pump delivery pump at both ends remains unchanged, especially when the demand for fuel pressure decreases, the power of the single-pump connected to the fuel tank on one side cannot be reduced too much to ensure the stability of the long-distance oil pressure, and the pumping pressure demand of the side connected to the burner decreases, thereby causing low efficiency and poor stability of the frequency conversion regulation of the pump set.The use of the relay tank and double-pump delivery ensures that the first oil pump always maintains the pumping pressure required for long-distance delivery, and the dynamic stability of the fuel pressure required by the burner and the pumping pressure frequency conversion control of the second pump set is maintained, so that the fuel supply system in the production process is efficient, safe and stable, and the service life of the oil pump can be prolonged.In addition, the fuel tank also has a liquid level display, the overflow valve is connected to the oil return main pipe, the high-position fuel supply pipe is provided with a check valve to ensure the convenience of repairing the pump set, and the pump set is matched with the corresponding electrical elements to realize automatic and remote control through the total control system.

[0033] 4.The asphalt mixing station of the present application connects the asphalt tank area and the boiler equipment area to the controller, realizes automatic and information management of the whole process of each action of the asphalt tank area, provides an operation mode of the boiler equipment under automatic operation, and connects various sensors to the system remote operation and monitoring to realize automatic control of the whole process of asphalt oil feeding, oil pumping, boiler equipment switching, heating and fault screening, wherein the sensors are used for monitoring the outlet over-temperature, exhaust over-temperature, outlet low pressure, low flow, liquid level and combustion failure of the boiler equipment, and the sensors are matched with the monitoring facilities arranged at the positions of the furnace body, pump set, safety valve and chimney in the boiler room to realize effective and reliable real-time monitoring with fast feedback speed.The pneumatic butterfly valve, manual gate valve and electric gate valve are respectively connected to the asphalt oil unloading pool and the boiler equipment to realize automatic control of the pipeline opening and closing.The operation cabinet of the boiler equipment is connected to the controller, a flame sensor is arranged in the boiler equipment to indicate the flame of the control system, an inlet and outlet pressure sensor and a temperature sensor are arranged to monitor the pressure and temperature of the boiler equipment, and an alarm is arranged on the circulating pump to indicate the abnormal operation of the circulating oil. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1It is a schematic diagram of main tower area of asphalt mixing station, which shows that the first dust removal module is respectively arranged in the metering layer and the mixing cylinder.

[0035] Figure 2 It is a schematic diagram of the second dust removal module in the main tower area (front view), and a schematic diagram of the smoke recovery system (front view). The figure shows that the second dust removal module is arranged in the mechanical overflow bin and the discharge port in the main tower area; the smoke recovery system is arranged in the trolley layer and the discharge port.

[0036] Figure 3 It is a schematic diagram of the negative pressure sensor arranged in the mixing cylinder.

[0037] Figure 4 It is a schematic diagram of the negative pressure sensor arranged in the drying roller.

[0038] Figure 5 It is a schematic diagram of the second dust removal module in the main tower area (top view), and a schematic diagram of the smoke recovery system (top view). The figure shows that the second dust removal module is arranged in the discharge port; the smoke recovery system is arranged in the discharge port and the connecting environmental protection facility.

[0039] Figure 6 It is a top view of the aggregate bin.

[0040] Figure 7 It is a schematic diagram of the conveying tunnel of the second dust removal module at the bottom of the aggregate bin.

[0041] Figure 8 It is a local enlarged view of the second dust removal module near the sunken hopper belt conveyor.

[0042] Figure 9 It is a schematic diagram of the connection of the boiler equipment and the asphalt tank area.

[0043] Figure 10 It is a schematic diagram of the fuel supply system.

[0044] 1 - main tower; 2 - metering layer; 3 - stirring cylinder; 4 - first air duct; 5 - second air duct; 6 - first electrically controlled gate valve; 7 - dust collection air pipe; 8 - first dust collector; 9 - drying roller; 10 - negative pressure sensor; 11 - trolley layer; 12 - overflow bin top interface; 13 - mechanical overflow bin; 14 - first flue gas pipe; 15 - first dust hood; 16 - dust collection-flue gas pipe branch; 17 - third air duct; 18 - second dust collector; 19 - second flue gas pipe; 20 - aggregate bin; 21 - sunken hopper belt conveyor; 22 - first conveying belt; 23 - aggregate; 24 - air suction pipe; 25 - branch air pipe; 26 - second dust hood; 27 - pneumatic flap door; 28 - discharge port; 29 - underground tunnel; 30 - second conveying belt; 31 - pneumatic butterfly valve; 32 - asphalt tank; 33 - electric gate valve; 34 - manual gate valve; 35 - stirrer; 36 - first asphalt pump; 37 - second asphalt pump; 38 - pipeline interface; 39 - asphalt unloading tank; 40 - oil tank; 41 - natural gas supply source; 42 - boiler burner; 43 - flame indicator; 44 - first temperature sensor; 45 - circulating pump; 46 - alarm; 47 - high-level oil tank of boiler; 48 - fuel oil tank; 49 - first oil pump; 50 - overflow valve; 51 - relay tank; 52 - frequency conversion feedback negative pressure sensor; 53 - second oil pump; 54 - low-level oil supply pipe; 55 - low-level oil return pipe; 56 - check valve; 57 - high-level oil supply pipe; 58 - high-level oil return pipe; 59 - main oil return pipe; 60 - low-level burner; 61 - high-level burner. DETAILED DESCRIPTION

[0045] The application will be further described in detail below in combination with the specific embodiments.

[0046] The existing new asphalt mixing station mainly covers the entire production area with a closed factory building to block the leakage of pollutants, and cooperates with the flue gas dust purification environmental protection facilities to treat the smoke dust in the factory. Although the effect of preventing and treating the external leakage of pollutants is obvious, the technical level of the production equipment, environmental protection facilities and production management in the factory building is different, and the control effect of the pollutants is not good. Moreover, most of the old asphalt mixture production stations cannot be supplemented with factory buildings, and only relying on environmental protection facilities cannot strictly control the emission of smoke dust pollutants. In addition, in terms of production, energy consumption and safety management, the new station can rely on the structure of the factory building to install a large number of monitoring to achieve efficient and full coverage monitoring effect, while most of the stations rely on the operation and management of personnel at each post, and the management level is generally determined by the quality of the management personnel. Asphalt production and construction are generally at night and are relatively continuous and time-consuming. As the production proceeds, the fatigue degree of the management personnel gradually accumulates, and the vigilance and safety awareness gradually decrease, so it is impossible to monitor each production unit, equipment failure energy consumption, factory safety matters and the like in real time and efficiently. If overall supervision is to be achieved, more manpower needs to be invested, increasing labor costs. Based on the problems existing in the existing asphalt mixing station, the following embodiments are provided:

[0047] Embodiment one;

[0048] The embodiment provides an intelligent environment-friendly asphalt mixing station, a main tower 1, the main tower 1 has a screening layer, a hot material bin, a metering layer 2, a mixing cylinder 3, a trolley layer 11 and a discharge port; the connecting parts of each component of the main tower 1 are provided with an envelope, and the sealing effect is enhanced; the screening layer and the hot material bin are the existing component structures of the main tower, and no more details are given here;

[0049] The mechanical overflow bin 13 is arranged at the front side of the main tower 1 and is used for receiving overflow materials;

[0050] The aggregate bin 20 is arranged at one side of the main tower 1, the aggregate 23 stored in the aggregate bin 20 is transported to the drying drum 9 for heating and drying through the sinking hopper belt conveyor 21 and the first conveying belt 22, the second conveying belt 30 and the like, and finally reaches the main tower 1;

[0051] The dust recovery system is connected to the metering layer 2, the mixing cylinder 3, the mechanical overflow bin 13, the conveying gallery at the bottom of the aggregate bin 20 and the discharge port respectively and is used for recovering dust;

[0052] The flue gas recovery system is connected to the trolley layer 11 and the discharge port respectively and is used for recovering flue gas.

[0053] The dust recovery system includes a first dust removal module and a second dust removal module, the first dust removal module is arranged at the metering layer 2 and the mixing cylinder 3 respectively, and the second dust removal module is arranged at the mechanical overflow bin 13, the discharge port and the conveying gallery at the bottom of the aggregate bin. The flue gas recovery system includes a flue gas purification device, a first flue gas pipeline 14 and a second flue gas pipeline 19, two ends of the first flue gas pipeline 14 are connected with the trolley layer 11 and a dust suction-flue gas pipeline tap 16 respectively; the second flue gas pipeline 19 is connected with the discharge port and a dust suction-flue gas pipeline tap environmental protection facility through the dust suction-flue gas pipeline tap 16.

[0054] Specifically, the first dust removal module comprises a first dust collector 8, a first air duct 4, a second air duct 5 and a dust collection air duct 7. The first air duct 4 and the second air duct 5 are connected with the metering layer 2 and the stirring cylinder 3 respectively, and are respectively provided with a first electric control gate valve 6. The first air duct 4 and the second air duct 5 are both connected with the dust collection air duct 7, and the dust collection air duct 7 is connected with the first dust collector 8. Since the connecting parts of the main tower 1 are sealed, the first air duct 4 and the second air duct 5 respectively extend into the working area of the metering layer 2 and the stirring cylinder 3. When the upper gate of the metering layer 2 is opened and the material falls into the metering layer 2 for weighing, the first electric control gate valve 6 on the first air duct 4 is opened, the negative pressure of the metering layer 2 is maintained through the air induction equipment of the first dust collector 8, the shaking of the material pressure sensor during weighing is reduced, the material measurement is stabilized, the measurement accuracy is improved, and the dust leakage to the gap of the mechanical connection of the main tower is reduced through the negative pressure difference between the inside of the main tower and the outside environment. When the lower gate of the metering layer 2 is opened, the material falls into the stirring cylinder 3, and the stirring cylinder 3 completes stirring and discharges to the trolley layer 11, the first electric control gate valve 6 on the second air duct 5 is opened, the negative pressure of the stirring cylinder 3 is maintained through the air induction equipment of the first dust collector 8, and the dust and asphalt smoke are reduced through the negative pressure. The feedback regulation of the negative pressure value is realized through the negative pressure sensor 10 in the stirring cylinder 3 and the drying roller 9.

[0055] The second dust removal module comprises a second dust remover 18, a third air duct 17, an air suction pipe 24, a branch air pipe 25, a second dust hood 26, and the two ends of the third air duct are connected with the second dust remover 18 and the dust-smoke pipe branch 16 respectively, the dust-smoke pipe branch 16 is connected with the mechanical overflow bin 13, the dust-smoke pipe branch 16 is connected with the first dust hood 15, and the first dust hood is connected with the discharge port. One end of the second dust remover is connected with the air suction pipe 24, the air suction pipe 24 is connected with the second dust hood 26 through the branch air pipe 25, and the second dust hood 26 is located above the discharge port of the sinking hopper belt conveyor 21 of the aggregate bin 20. The interface of the mechanical overflow bin 13 is connected with the overflow pipe of the main tower 1. During production, the second dust remover is opened, the dust of the overflow material falling from the mechanical overflow bin 13 is adsorbed through the third air duct 17, and the dust of the raw aggregate discharged after cleaning the mixing drum is removed through the third air duct 17, the dust-smoke pipe branch 16 and the first dust hood 15. In addition, taking six bin positions as an example, the six bin positions of the aggregate bin 20 are arranged side by side, two sinking hopper belt conveyors 21 are arranged on the ground of each bin of the aggregate bin 20, an underground tunnel 29 is arranged at the bottom of the aggregate bin 20, the first conveying belt 22 is arranged in the underground tunnel 29, the aggregate falls from the hopper of the sinking hopper belt conveyor 21, is thrown to the first conveying belt 22 through the sinking hopper belt conveyor 21, is transported to the second conveying belt 30 through the first conveying belt 22, and finally reaches the drying drum 9. The aggregate bin 20 stores various specifications of aggregate 23 used for producing asphalt mixture. One end of the second dust remover 18 is provided with the air suction pipe 24 which leads into the underground tunnel 29 and is arranged in parallel with the first conveying belt 22, the air suction pipe 24 is provided with the branch air pipe 25, the branch air pipe 25 is connected with the second dust hood 26 at the material throwing port of the sinking hopper belt conveyor 21, and the pneumatic flap door 27 is arranged between the branch air pipe 25 and the second dust hood 26. The second dust remover 18 is provided with the discharge port 28 above the second conveying belt 30, and the pneumatic flap door 27 is also arranged in the middle.

[0056] The smoke gas recovery system comprises a smoke gas purification device, a first smoke gas pipe 14, a second smoke gas pipe 19 and a dust-smoke pipe branch 16. During the process that the asphalt mixture in the mixing drum is discharged to the trolley layer 11 and the mixture is discharged to the transport vehicle through the discharge port, the first smoke gas pipe 14 connects the trolley layer to the smoke gas purification device through the dust-smoke pipe branch 16 and the second smoke gas pipe 19; the second smoke gas pipe 19 is connected to the air suction port at the bottom of the discharge port through the dust-smoke pipe branch 16, and the smoke gas of the discharge port is adsorbed to the smoke gas purification device.

[0057] Particularly, the dust- flue gas pipeline tap 16 has an electrically controlled gate, when the dust is adsorbed, the third induced draft pipeline 17 is opened, and the second flue gas pipeline 19 is closed. When the flue gas is adsorbed, the third induced draft pipeline 17 is closed, and the second flue gas pipeline 19 is opened. Dust and asphalt flue gas mixing, sticking or blocking the pipe section can be avoided.

[0058] Through the above setting, the asphalt mixing station can produce the dust recovery structure corresponding to the metering layer 2, the mixing cylinder 3, the mechanical overflow bin 13, the aggregate bin 20 and the discharge port, and the flue gas recovery structure corresponding to the trolley layer 11 and the discharge port, so as to realize the all-round dust and flue gas prevention of the asphalt mixing station, improve the environmental protection degree.

[0059] The working principle of the scheme in the above embodiment is as follows:

[0060] In use, asphalt mixture production will produce a large amount of dust, asphalt flue gas, and overflow will be discharged, and dust is mainly generated by stone, powder falling and overflow falling to the ground. When the aggregate 23 falls, the first electrically controlled gate valve 6 is opened, and the first dust collector 8 is simultaneously used to extract air from the metering layer 2 and the mixing cylinder 3. According to the feedback data of the negative pressure sensor 10, the opening size of the first electrically controlled gate valve 6 is adjusted, so that the main tower 1 always maintains the required negative pressure, greatly reducing the dust discharge. In addition, the second dust collector 18 and the first dust hood 15 work synchronously, and the first flue gas pipeline 14 and the third induced draft pipeline connected by the trolley layer 11 and the first dust hood 15 are used to introduce the dust and flue gas into the dust collector and the flue gas purification environmental protection equipment respectively. For the disposal of overflow, a mechanical overflow bin 13 is matched in front of the main tower 1, and the overflow will fall into the bin through the top interface 12 of the bin. The second dust collector 18 is used to remove dust from the overflow bin during the falling process of the overflow, and the overflow in the bin is unloaded through the bottom discharge hopper of the bin to the trolley or the loader for reuse.

[0061] Compared with the existing asphalt mixing station with a single air suction pipe, the first induced draft pipeline 4 and the second induced draft pipeline 5 are derived from the original air suction pipe of the equipment. The negative pressure sensor 10 matched with the induced draft pipeline can more efficiently prevent the dust and flue gas in the key parts of the main tower 1 from leaking, and maintain the negative pressure in the tower. For the mixing station matched with the asphalt hot recycling equipment, it can also stabilize the pressure fluctuation of the metering scale caused by the evaporation of water vapor when the recycled material is unloaded to the metering layer 2 and the mixing cylinder 3, ensure the metering stability, improve the metering accuracy, make the mix proportion more accurate, and ensure the product quality.

[0062] During production, the aggregate 23 will also produce a large amount of dust during the conveying process. For the currently widely used underground bin structure, the underground tunnel 29 will be full of dust, which on the one hand causes dust on the ground, and on the other hand, if the belt conveyor system fails, the visibility in the tunnel is low during emergency maintenance, and a long dust settling time is required.

[0063] Compared with the existing underground bunker structure, there are few underground dust removal systems. The arrangement of the air suction pipe 24 and the second dust hood 26 in the underground bunker structure can greatly reduce the dust in the underground tunnel during production by dust removal through the second dust collector 18. The collected dust is also a usable raw material, stone powder, which can be directly put into the conveying belt for production through the discharge port 28, thereby saving resources to a certain extent.

[0064] Example two;

[0065] The asphalt mixing station of the embodiment includes an asphalt tank area and a boiler device. The asphalt tank area includes an asphalt tank 32, asphalt pumps, and an asphalt unloading pool 39. The number of asphalt pumps is three. Two asphalt pumps are connected to the inlet of the asphalt tank 32 and are both connected to the asphalt unloading pool 39. The remaining asphalt pump is connected to the asphalt tank 32. The asphalt tank 32 is also connected to a pipeline interface 38 for external connection of an asphalt spraying vehicle pump. The boiler device heats the conductive oil to cyclically heat the asphalt in the asphalt tank 32. A stirrer 35 is installed in the asphalt tank 32 to uniformly stir the asphalt to prevent solidification. The three asphalt pumps are divided into a first asphalt pump 36 and two second asphalt pumps 37. The first asphalt pump 36 is mainly used for expansion and extension, such as being used for connecting the asphalt tank 32 and an expanded asphalt tank or being used as a matrix asphalt supply interface for connecting a rubber asphalt device. The remaining asphalt in the asphalt tank 32 is pumped into the tank through the asphalt unloading pool 39 and the second asphalt pump 37. The second asphalt pump 37 pumps the asphalt into or out of the asphalt tank 32, one of which is used as a backup for failure. Taking the example of six asphalt tanks 32 connected in parallel, six electric gate valves 33 are arranged in the pipelines between the six asphalt tanks 32 for automatically controlling the on-off of the conductive oil circulation pipeline. A pneumatic butterfly valve 31 is mainly used for controlling the on-off of the asphalt pipeline. A manual gate valve 34 is mainly used for circuit interruption during maintenance.

[0066] The boiler device includes an oil tank 40, a natural gas supply source 41, a boiler burner 42, a circulating pump 45, a boiler high-level oil tank 47, and a conductive oil circulation pipeline. The oil or natural gas in the oil tank 40 is ignited and heated in the boiler burner 42 to heat the circulating conductive oil. A flame sensor is installed in the boiler device to control the flame indication 43 of the system. The circulating pump 45 is connected to the conductive oil circulation pipeline. The conductive oil circulation pipeline is connected to the asphalt tank 32. The boiler burner heats the conductive oil circulation pipeline. The boiler high-level oil tank is connected to the circulating conductive oil return pipeline. The connection point is located before the circulating pump. The circulating conductive oil for heating asphalt flows and heats among the boiler burner 42, the asphalt tank 32, and the asphalt unloading pool 39 through the circulating pump 45. The conductive oil is stored in the boiler high-level oil tank 47 and can be automatically compensated. The oil tank has a liquid level display. The control system can monitor the condition of the boiler high-level oil tank 47.

[0067] The embodiment does not mention the part same as example one.

[0068] Example three;

[0069] The intelligent environment-friendly asphalt mixing station of the embodiment comprises a fuel supply system and a drying drum 9 for drying the aggregate 23 conveyed from the aggregate bin 20 to the main tower 1. The fuel supply system comprises a fuel tank 48, a first oil pump 49, a second oil pump 53, a relay tank 51, a low-position fuel supply pipe 54, a high-position fuel supply pipe 57, a low-position fuel return pipe 55, a high-position fuel return pipe 58, and a fuel return main pipe 59. Fuel is pumped out from the fuel tank 48 by the first oil pump 49, reaches the relay tank 51, and is then pumped to the low-position burner 60 and the high-position burner 61 by the second oil pump 53 through the low-position fuel supply pipe 54 and the high-position fuel supply pipe 57, respectively. The fuel return is returned to the fuel return main pipe 59 through the low-position fuel return pipe 55 and the high-position fuel return pipe 58, respectively. The relay tank 51 has a liquid level display, is installed with a variable frequency feedback negative pressure sensor 52 and an overflow valve 50, and ensures the safety and real-time adjustment of the tank oil pressure during long-term conveying, prevents the tank pressure from being too large, and prevents the high-position fuel supply pipe 57 from being installed on the ground and being prone to maintenance short circuits. The overflow valve 50 is connected with the fuel return main pipe, and the high-position fuel supply pipe is installed with a check valve 56. It should be noted that the first oil pump 49 is stabilized at the pumping pressure required for long-distance transportation of fuel for the low-position burner 60 or the high-position burner 61, and the second oil pump 53 is adjusted in frequency according to the actual production temperature required to directly supply fuel to the corresponding burner.

[0070] For the fuel supply, the single-pump conveying currently used in the mixing station is replaced by the relay tank 51 cooperating with the double-pump constant-pressure fuel supply. The fuel tank 48 is pumped to the relay tank 51 by the first oil pump 49, and then pumped to the low-position burner 60 and the high-position burner 61 by the second oil pump 53. When the oil pressure required by the burner changes, especially when the required fuel pressure decreases, the power at both ends of the single-pump conveying pump remains unchanged, the first oil pump 49 always maintains the pumping pressure required for long-distance transportation, the required oil pressure of the corresponding burner and the pumping pressure of the second oil pump 53 are dynamically stabilized by frequency control, the fuel supply system of the production process is efficient, safe and stable, and the service life of the oil pump can be prolonged. The pump groups cooperate with the corresponding electrical elements, and automatic and remote control can be realized through the total control system.

[0071] The part not mentioned in the embodiment is the same as that in example two.

[0072] Example four;

[0073] The asphalt mixing station of the embodiment further comprises a control system, and the control system comprises a controller.

[0074] The first air duct 4 and the second air duct 5 are each provided with a first electrically controlled gate valve 6, and the controller controls the first electrically controlled gate valve 6 to control the communication or closing of the first air duct 4 and the second air duct 5.

[0075] The stirring cylinder 3 and the drying roller 9 are provided with negative pressure sensors 10, and the controller receives the signals of the negative pressure sensors 10; the controller controls the opening size of the first electric control gate valve 6 through the feedback value of the negative pressure sensor 10.

[0076] The air suction pipe 24, the branch air pipe 25 and the discharge port of the second dust collector 18 are provided with pneumatic flap doors, the controller controls the on-off of the air flow in the air suction pipe and the branch air pipe by controlling the pneumatic flap doors, and the controller controls the on-off of the discharge port of the second dust collector by controlling the pneumatic flap doors;

[0077] The heat conducting oil inlet of the asphalt tank 32 is provided with an electric gate valve 33, and the heat conducting oil outlet of the asphalt tank 32 is provided with a manual gate valve 34 which plays a role of cutting off during maintenance. The electric gate valve 33 is electrically connected with the controller to remotely control the on-off;

[0078] The inlet and the outlet of the asphalt tank 32 are provided with pneumatic butterfly valves 31 which are connected with the controller to control the on-off of the asphalt pipeline of the asphalt tank 32;

[0079] The asphalt tank 32 is provided with a pressure liquid level sensor and a first temperature sensor 44, and the pressure liquid level sensor and the temperature sensor are electrically connected with the controller;

[0080] The operation cabinet of the boiler equipment is connected with the controller;

[0081] The boiler burner 42 is provided with a flame sensor, and the flame sensor is connected with the controller;

[0082] The inlet and the outlet of the boiler burner 42 are provided with pressure sensors and a second temperature sensor, and the pressure sensors and the second temperature sensor are electrically connected with the controller;

[0083] The circulating pump 45 is provided with an alarm 46, and the alarm 46 is electrically connected with the controller.

[0084] The controller controls the operation of the boiler equipment as follows: after the valve of the circulating pump 45 is opened to the position and closed to the position and the display is selected, the “start button” is clicked to start, and then the “stop button” is clicked to stop; the “start button” of the boiler burner 42 is clicked to start ignition, and then the “stop button” is clicked, and the boiler burner 42 is reset to return to the controller; the “automatic” of the boiler burner 42 is clicked, and then the “cancel” is clicked; the big fire / small fire conversion is adopted by clicking.

[0085] The parts not mentioned in the embodiment are the same as those in the third embodiment.

[0086] For the management of asphalt tank area and boiler equipment, compared with the existing two independent operation, that is, the operating system of the mixing station equipment controls the asphalt tank area, and the boiler equipment is operated by its control cabinet, through a certain number of pneumatic butterfly valves 31, manual gate valves 34, electric gate valves 33 connected with asphalt unloading pool 39, boiler equipment respectively, to realize the automatic control of pipeline on-off. The operation cabinet of the boiler equipment is connected to the controller, and a flame sensor is installed in the boiler equipment for the flame indication 43 of the control system, and an import and export pressure, temperature sensor is also installed for monitoring the pressure and temperature indication of the system, and the circulating pump 45 is provided with an alarm 46 for indicating the abnormal operation of the circulating oil, realizing the automatic control of the asphalt-conductive oil part of the production process. For safety supervision, the main problems of boiler operation such as outlet over-temperature, exhaust smoke over-temperature, outlet low pressure, low flow, liquid level and combustion failure are realized through various sensors connected to the system for remote monitoring, which is effective and reliable, with fast real-time monitoring feedback speed, and the monitoring is installed near the boiler furnace, near the pump group of the asphalt tank area, at the unloading pool position, near the fuel tank and oil pump, etc. Key areas and key positions, which can realize efficient and intelligent supervision of the asphalt tank area, fuel supply system and boiler equipment.

[0087] In the embodiment, the control of temperature, pressure and other numerical values is adjusted according to actual production.

[0088] The above embodiment is the preferred embodiment of the present application, but the embodiment of the present application is not limited by the above embodiment, and any change, modification, substitution, combination, simplification made without departing from the spirit and principles of the present application should be an equivalent replacement method, which is included in the protection scope of the present application.

Claims

1. An intelligent environment-friendly asphalt mixing station, characterized in that, The application relates to a mechanical type asphalt mixing tower, which comprises the following parts: a main tower, which has a metering layer, a stirring cylinder, a trolley layer and a discharge port; a mechanical type overflow bin, which is arranged at the front side of the main tower; a aggregate bin, which is arranged at one side of the main tower and is used for supplying aggregate to the main tower; a dust recovery system, which is connected to the metering layer, the stirring cylinder, the mechanical type overflow bin, the aggregate bin and the discharge port respectively and is used for recovering dust; a flue gas recovery system, which is connected to the trolley layer and the discharge port respectively and is used for recovering flue gas; the dust recovery system comprises a first dust removal module and a second dust removal module, the first dust removal module is arranged at the metering layer and the stirring cylinder respectively, and the second dust removal module is arranged at the mechanical type overflow bin, the discharge port and the bottom of the aggregate bin respectively; the application further comprises a fuel supply system, a high-position drying roller and a low-position drying roller, the high-position drying roller is used for drying asphalt regeneration material, the low-position drying roller is used for drying aggregate supplied to the main tower from the aggregate bin, the fuel supply system comprises a fuel tank, a first oil pump, a second oil pump, a relay tank, a low-position oil supply pipe, a high-position oil supply pipe, a low-position oil return pipe, a high-position oil return pipe and an oil return main pipe, the first oil pump is connected to the fuel tank through a pipeline, the relay tank is connected to the first oil pump through a pipeline, the second oil pump is connected to the relay tank through a pipeline, and the second oil pump is connected to the low-position oil supply pipe and the high-position oil supply pipe respectively; the low-position drying roller and the high-position drying roller are respectively provided with a low-position burner and a high-position burner, the low-position oil supply pipe and the high-position oil supply pipe are connected to the low-position burner and the high-position burner respectively, the low-position oil return pipe and the high-position oil return pipe are connected to the low-position burner and the high-position burner respectively, the low-position oil return pipe and the high-position oil return pipe are connected to the oil return main pipe, and the oil return main pipe is connected to the fuel tank.

2. The intelligent environment-friendly asphalt mixing station according to claim 1, characterized in that: The first dust removal module comprises a first dust remover, a first air induction pipeline, a second air induction pipeline and a dust collection air pipe, the first air induction pipeline and the second air induction pipeline are connected to the metering layer and the stirring cylinder respectively, and the first air induction pipeline and the second air induction pipeline are connected to the dust collection air pipe, and the dust collection air pipe is connected to the first dust remover.

3. The intelligent environment-friendly asphalt mixing station according to claim 2, characterized in that: The second dust removal module comprises a second dust remover, a third air induction pipeline, a suction air pipe, a branch air pipe and a second dust collection cover, two ends of the third air induction pipeline are connected to the second dust remover, the mechanical type overflow bin and a dust suction-flue gas pipeline branch joint respectively, the dust suction-flue gas pipeline branch joint is connected to a first dust collection cover, and the first dust collection cover is arranged at the discharge port; one end of the second dust remover is connected to the suction air pipe, the suction air pipe is connected to the second dust collection cover through the branch air pipe, and the second dust collection cover is arranged above a sinking type hopper belt conveyor discharge port of the aggregate bin.

4. The intelligent environment-friendly asphalt mixing station according to claim 3, characterized in that: The flue gas recovery system comprises a flue gas purification device, a first flue gas pipeline and a second flue gas pipeline, two ends of the first flue gas pipeline are connected to the trolley layer and the dust suction-flue gas pipeline branch joint respectively, and the second flue gas pipeline is connected to the discharge port and the flue gas purification device through the dust suction-flue gas pipeline branch joint.

5. The intelligent environment-friendly asphalt mixing station according to claim 4, characterized in that, The application further comprises: a boiler device, which is used for heating heat-conducting oil; an asphalt tank area, which is connected to the boiler device and is used for heating asphalt, and is connected to the main tower and is used for supplying asphalt to the main tower and aggregate mixing.

6. The intelligent environment-friendly asphalt mixing station according to claim 5, characterized in that: The asphalt tank area includes an asphalt tank, three asphalt pumps, and an asphalt unloading pool. Two asphalt pumps are connected with the inlet of the asphalt tank and are connected with the asphalt unloading pool. The remaining asphalt pump is connected with the outlet of the asphalt tank, serving as an interface for supplying base asphalt when the asphalt tank is connected with an expanded asphalt tank or rubber asphalt equipment. The asphalt tank is also connected with a pipeline interface for supplying an asphalt spraying vehicle. The boiler equipment heats the asphalt in the asphalt tank through the circulation of heat conducting oil.

7. The intelligent environment-friendly asphalt mixing station according to claim 6, characterized in that: The boiler equipment includes an oil tank, a natural gas supply source, a boiler burner, a circulating pump, a circulating heat conducting oil return pipe, a boiler high oil tank, and a heat conducting oil circulation pipeline. The oil tank and the natural gas supply source are connected with the boiler burner. The circulating pump is connected with the heat conducting oil circulation pipeline, which is connected with the asphalt tank. The boiler burner heats the heat conducting oil circulation pipeline. The boiler high oil tank is connected with the circulating heat conducting oil return pipe, and the connection point is located before the circulating pump.

8. The intelligent environment-friendly asphalt mixing station according to claim 7, characterized in that: The control system includes a controller. The first air duct and the second air duct are both provided with a first electric control gate valve. The controller controls the first electric control gate valve to control the communication or closing of the first air duct and the second air duct. The air suction pipe, the branch air pipe, and the discharge port of the second dust collector are all provided with a pneumatic flap door. The controller controls the pneumatic flap door to control the on-off of the airflow in the air suction pipe and the branch air pipe, and controls the pneumatic flap door to control the on-off of the discharge port of the second dust collector. The stirring cylinder and the drying drum are both provided with a negative pressure sensor. The controller receives the signal of the negative pressure sensor. The heat conducting oil inlet of the asphalt tank is provided with an electric gate valve, and the heat conducting oil outlet of the asphalt tank is provided with a manual gate valve. The electric gate valve is electrically connected with the controller to remotely control the on-off. The inlet and the outlet of the asphalt tank are both provided with a pneumatic butterfly valve, which is connected with the controller to remotely control the on-off of the inlet and the outlet of the asphalt tank. The asphalt tank is provided with a pressure liquid level sensor and a first temperature sensor, both of which are electrically connected with the controller. The boiler burner is provided with a flame sensor, which is connected with the controller. The inlet and the outlet of the boiler burner are provided with a pressure sensor and a second temperature sensor, both of which are electrically connected with the controller. The circulating pump is provided with an alarm, which is electrically connected with the controller.

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