CN105776801B - Vehicle-mounted sludge drying device and drying method - Google Patents

Abstract

The invention relates to a vehicle-mounted sludge drying device and a drying method, wherein the drying device comprises a spiral feeder, a heat exchanger, a stirrer, a material box, a cyclone dust collector, a fan, a discharger, a burner and an exhaust pipe, wherein a discharge hole of the spiral feeder is communicated with a feed hole of the stirrer, a discharge hole of the stirrer is communicated with the side surface of the material box, the heat exchanger and the burner are respectively arranged at the bottom side of the stirrer, the burner is positioned above the heat exchanger, the cyclone dust collector is arranged at the top of the material box, the discharger is arranged at the bottom of the material box, an air inlet of the cyclone dust collector is connected with the fan, and an air. The invention not only can reduce the sludge to the greatest extent and reduce the transportation cost, but also can recycle the waste after the sludge is fully dried, thereby fully embodying the environmental protection concept of energy conservation and emission reduction.

Description

Vehicle-mounted sludge drying device and drying method

Technical Field

The invention relates to the field of sludge drying treatment, in particular to a sludge drying device for a sewer and a septic tank.

background

In recent 20 years, with the rapid development of urban construction in China, the length of urban sewers is also rapidly increased, but municipal management still has heavy construction and light maintenance, and particularly has defects in the aspects of pipeline maintenance, maintenance technology and the like. In recent 10 years, sewage suction and dredging machines for urban sewers and septic tanks in China have been developed rapidly.

Municipal sanitation special vehicles for dredging, cleaning and dirt absorbing of sewers and septic tanks in the current market of China mainly comprise three types: a sewage suction truck, a dredging and cleaning truck and a combined dredging (sewage suction and dredging) truck. Because the vehicle-mounted equipment is limited by the external dimension and the weight, the volumes of the sewage tank and the clean water tank are limited, so that the cleaning or sewage suction time is only about 10 minutes, and if the cleaning or sewage suction operation of the sewer is not completed in one operation, the sewage in the sewage tank is firstly returned to the field to be discharged or the clean water tank is filled with clean water to perform the operation again; and secondly, because the sewage in the sewage tank is not subjected to mud-water separation, the reduction of the sewage cannot be realized, so that the transportation cost of the vehicle is high, the treatment load of a sewage treatment plant is increased, and the phenomenon of secondary pollution caused by poor sealing of the vehicle in the transportation process also exists. The existing products generally have the defects of short operation time, single function, low operation efficiency, high operation cost, secondary pollution and the like.

in order to solve the problems, the invention discloses a combined sewage suction truck ultrasonic mud-water separation comprehensive treatment device which is disclosed in Chinese invention patent CN201410242474, and the invention can fully separate sludge and water in sewage through an ultrasonic pretreatment device, and then respectively perform water drainage and sludge discharge.

In addition, the vacuum sewage suction truck sludge-water separation device disclosed in patent CN201120437957.4 and the sewer sewage cleaning truck sludge-water separation device disclosed in patent CN201520071930.6 are both innovative and improved in sludge-water separation in view of the prior art, but there is still a great room for improvement on how to reduce the amount of sludge after separation and effectively utilize the sludge.

disclosure of Invention

the invention aims to provide a vehicle-mounted sludge drying device which can further dry sludge obtained by carrying out sludge-water separation on sewage by a dredging vehicle in the prior art so as to reduce the sludge to the maximum extent.

In order to achieve the purpose, the invention adopts the technical scheme that:

The utility model provides a vehicular sludge drying device, its characterized in that includes spiral feeder, heat exchanger, mixer, workbin, cyclone, fan, tripper, combustor and exhaust pipe, wherein, the discharge gate of spiral feeder communicates with each other with the feed inlet of mixer, the discharge gate of mixer communicates with the workbin side, the mixer bottom side is equipped with heat exchanger and combustor respectively, and the combustor is located the top position of heat exchanger, the top of workbin is equipped with cyclone, the bottom is equipped with the tripper, cyclone's air intake and fan meet, the air outlet connects the exhaust pipe.

Preferably, the mixer include the churn, (mixing) shaft and a plurality of stirring teeth of setting on the (mixing) shaft of setting in the churn, the churn on set up feed inlet and discharge gate, this discharge gate with the churn circumferencial direction is tangent, the feed inlet below of churn is equipped with the air intake, this air intake department is equipped with curved second guide plate, the direction and the (mixing) shaft direction of rotation of second guide plate are unanimous.

preferably, the stirring shaft is a hollow cross shaft, the center of the shaft is a hollow circular tube, and a plurality of connecting plates are uniformly distributed on the outer circumferential surface of the circular tube.

Preferably, the stirring teeth are of a U-shaped structure and are provided with semi-arc ends and parallel free ends, the semi-arc ends are fixed on the connecting plates of the stirring shaft through arc-shaped pressing plates, and the stirring teeth between the connecting plates are arranged in a staggered mode. The U-shaped structure of the stirring teeth can increase the cutting area of mud cakes and is convenient for positioning and installation.

Preferably, an arc-shaped third guide plate is arranged at the discharge port of the mixing drum, and the concave arc of the third guide plate faces downwards.

Preferably, the cyclone dust collector is of a cylindrical structure, the axis direction of the cyclone dust collector is horizontally arranged at the upper part of the feed box, an air inlet is arranged at the tangent position of the rear side part of the feed box and the circumference, a first guide plate which is tangentially connected with the circumference of the cyclone dust collector and is vertically arranged is arranged at the air inlet, and a semicircular arc plate is arranged at the center of the cyclone dust collector close to the air inlet; the side of the cyclone dust collector, which is far away from the air inlet, is provided with a discharge opening tangent to the circumferential direction, and separated dust enters a small material box through the discharge opening.

Preferably, the upper part of the small material box is directly connected with the air inlet of the fan through a small air pipe, so that the small material box generates a pressure difference relative to the cyclone dust collector, and the dust removal effect of large-particle dust is improved.

Preferably, the water inlet and the water outlet of the heat exchanger are respectively connected with the water outlet and the water inlet of the chassis engine. The heat of the engine is fully utilized, and a good energy-saving effect is achieved.

Preferably, the exhaust pipe is provided with a water washing dust remover, the two sides of the water washing dust remover are respectively provided with a spray pipe with small holes, and the direction of the small holes is vertical to the direction of the air flow.

The invention adopts another technical scheme that:

A method of sludge drying comprising:

Step 1, conveying mud cakes generated by a dredging vehicle with a mud-water separation function into a stirrer through a spiral feeder, and cutting the mud cakes into particles with uniform sizes by using stirring teeth of the stirrer;

Step 2, after being heated by the heat exchanger, the outside air is heated by the burner again to generate hot air with the temperature exceeding 150 ℃, the hot air enters the stirrer from a second guide plate of the stirrer, and the hot air and wet sludge particles rotate, mix, exchange heat and dry together under the action of airflow and the stirring shaft and then enter a material box from the tangential direction of the upper part of the stirrer to form dry sludge particles, dust with larger particles and air with dust;

And 3, enabling air with dust to enter the cyclone dust collector from the upper part of the material box, enabling dried sludge particles to enter a sewage collecting bag through a discharger port at the bottom under the action of gravity, enabling the dust with larger particles to enter a small material box through centrifugal sedimentation, and directly connecting the small material box with an air inlet of a fan through a small air pipe, so that the small material box generates a pressure difference relative to the cyclone dust collector, and the dust removal effect of the dust with large particles is improved.

And 4, further removing dust of the air discharged by the fan through a water washing dust remover on the exhaust pipe.

Compared with the background technology, the technical scheme has the following advantages:

1. the amount of dirt is reduced, and the transportation cost is reduced: after mud and water are separated, the separated sludge is concentrated, dehydrated and dried, so that the sewage is reduced by more than 98%;

2. And (3) recycling waste: the sludge subjected to mud-water separation has large water content and cannot be recycled, and the material obtained after the sludge is dried after dehydration can be used as an organic fertilizer for crops and can also be used for incineration power generation.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a right side view of fig. 1.

fig. 3 is a rear view of fig. 1.

fig. 4 is an enlarged view of a portion C of fig. 1.

FIG. 5 is a schematic view of the structure of the stirring shaft.

Figure 6 is a schematic cross-sectional view of the bin and cyclone.

Fig. 7 is a schematic sectional view taken along line B-B of fig. 6.

FIG. 8 is a schematic view of a second baffle structure of the blender of the present invention.

in the figure:

1-screw feeder

2-Heat exchanger

3-stirrer 31-power device 32-coupler 33-stirring teeth 34-arc-shaped pressing plate

35-stirring shaft 36-stirring drum 38-second guide plate 311-power device

312-drive shaft 353-flange 313-smaller tapered roller bearing

314-larger tapered roller bearing 315-Y shaped oil seal

352-hollow round tube 351-connecting plate 4-material box 42-arc third guide plate

5-cyclone dust collector 51-arc plate 52-first guide plate 53-small bin

54-rubber sealing strip 55-small air pipe 57-discharge opening 6-fan

7-discharger 8-washing dust remover 81-spray water pipe

9-burner 10-exhaust pipe

Detailed Description

In order to further explain the technical solution of the present invention, the following detailed description is given by way of specific examples.

A vehicle-mounted sludge drying device comprises a spiral feeder 1, a heat exchanger 2, a stirrer 3, a material box 4, a cyclone dust collector 5, a fan 6, a discharger 7, a water washing dust collector 8, a combustor 9 and an exhaust pipe 10.

The discharge port of the spiral feeder 1 is communicated with the feed port of the stirrer 3, the discharge port of the stirrer 3 is communicated with the side surface of the material box 4, the heat exchanger 2 and the burner 9 are respectively arranged at the bottom side of the stirrer 3, the burner 9 is positioned above the heat exchanger 2, the top of the material box 4 is provided with the cyclone dust collector 5, the bottom of the material box is provided with the discharger 7, the air inlet of the cyclone dust collector 5 is connected with the fan 6, and the air outlet is connected with the exhaust pipe 10.

Specifically, as shown in fig. 1, 4, 5, and 8, the mixer 3 includes a mixing drum 36, a mixing shaft 35 provided in the mixing drum 36, and a plurality of mixing teeth 33 provided on the mixing shaft 35.

The left lower side and the right upper side of the mixing drum 36 are respectively provided with a feeding hole and a discharging hole, the feeding hole is connected with the discharging hole of the spiral feeder 1, the discharging hole is connected with the material box 4, and the direction of the discharging hole is tangent to the circumferential direction of the mixing drum 36. An air inlet is further formed below the feed inlet at the lower left side of the stirring cylinder 36, an arc-shaped second guide plate 38 is arranged at the air inlet, and the direction of the second guide plate 38 is consistent with the rotating direction of the stirring shaft 35. The left side of the heat exchanger 2 is provided with a burner 9 at the lower side of the air inlet of the mixing drum 36.

The stirring cylinder 36 has a stirring shaft 35 at the center, a circular flange 353 is provided on the top of the stirring shaft 35, and a boss is provided on the upper side of the flange 353. The axial center of the stirring shaft 35 coincides with the axial center of the stirring drum 36. The stirring shaft 35 is a hollow cross shaft, the center is a hollow circular tube 352, 4 connecting plates 351 are uniformly distributed on the outer circumferential surface of the circular tube 352, screw holes with equal intervals are formed in the connecting plates 351, and the screw holes in each adjacent connecting plate are staggered up and down.

The rabble teeth 33 are U-shaped. The semi-arc end of the stirring teeth 33 is fixed on the connecting plate 351 of the stirring shaft 35 through an arc-shaped pressing plate 34, and the U-shaped structure of the stirring teeth 33 can increase the cutting area of mud cakes and is convenient for positioning and installation.

The right center of the upper part of the mixing drum 36 is provided with a power device 311, and the power device 311 is connected with the mixing shaft 35 through a coupling 32. The coupler 32 is circular, the upper side surface is a boss, the boss is matched with a transmission shaft 312 of the power device 311, the lower side surface of the coupler 32 is a concave circular groove, the concave circular groove is matched with a circular flange 353 boss at the top of the stirring shaft 35, and a bolt arranged in a ring shape is arranged in the concave circular groove and connected with the transmission shaft 312.

the transmission shaft 312 is a hollow stepped shaft, the lower part of the stepped shaft is provided with a circular groove matched with the boss of the coupler 32, the lower end face of the stepped shaft is provided with screw holes which are annularly arranged for assembling bolts in the groove of the coupler 32, and the connection between the transmission shaft 312 and the stirring shaft 35 is realized, so that power is transmitted. The lower part of the transmission shaft 312 is provided with a larger tapered roller bearing 314, and a Y-shaped oil seal 315 is arranged below the tapered roller bearing 314; the upper part of the transmission shaft 312 is provided with a smaller tapered roller bearing 313, the upper surface of the smaller tapered roller bearing 313 is locked by a washer and a round nut, and the larger bearing 314 and the smaller bearing 313 are arranged back to back; the upper portion of the central hole of the drive shaft 312 is fitted to the shaft of the reduction motor.

As shown in fig. 1 and 2, the water inlet and the water outlet of the heat exchanger 2 are respectively connected with the water inlet and the water outlet of the chassis engine. The heat of the engine is fully utilized, and a good energy-saving effect is achieved.

as shown in fig. 6, an arc-shaped third guide plate 42 is arranged at the air inlet of the material box 4 connected with the mixing drum 36, the concave arc of the third guide plate faces downwards, so that the dust airflow entering the material box 4 moves downwards, large-particle dust is deposited, and the airflow containing small particles enters the cyclone dust collector from the side face in a countercurrent and upward manner along the circumferential tangential direction of the cyclone dust collector 5.

As shown in fig. 6 and 7, the cyclone 5 is a cylindrical structure, the axis direction of the cyclone 5 is horizontally arranged at the upper part of the feed box 4, the air inlet is tangential to the circumference, the first guide plate 52 which is tangentially connected with the circumference of the cyclone and is vertically arranged is arranged at the air inlet, and a semicircular arc plate 51 is arranged at the center of the cyclone and close to the air inlet side. The cyclone dust collector 5 is provided with a discharge opening 57 tangential to the circumferential direction at the side far away from the air inlet, and separated dust enters the small material box 53 through the discharge opening 57. The upper part of the small material box 53 is also directly connected with the small material box 53 and the inlet of the fan 6 through a small air pipe 55, so that the small material box 53 generates a pressure difference relative to the cyclone dust collector 5, and the dust removal effect of large-particle dust is improved. The U-shaped hollow rubber sealing strip 54 is used for sealing between the outlet of the cyclone dust collector 5 and the air inlet of the fan, so that the problem that the cyclone dust collector is influenced by the vibration of the fan due to the flexible connection of the fan and the cyclone dust collector can be solved, the sealing effect can be realized, and the installation space can be saved.

As shown in fig. 3, the exhaust duct 10 is provided with a water scrubber 8, which is provided with spray pipes 81 with small holes on two sides, respectively, and the direction of the small holes is perpendicular to the direction of the air flow.

When the device is used for drying the sludge, the method comprises the following steps:

step 1, conveying mud cakes generated by a dredging vehicle with a mud-water separation function into a stirrer 3 through a spiral feeder 1, and cutting the mud cakes into sludge particles with uniform sizes by using stirring teeth 33 of the stirrer 3;

step 2, after being heated by the heat exchanger 2, the outside air is heated by the burner 9 again to generate hot air with the temperature exceeding 150 ℃, the hot air enters the stirrer 3 from a second guide plate 38 of the stirrer 3, and the hot air and wet sludge particles rotate, mix, exchange heat and dry together under the action of an airflow and a stirring shaft 35 and then enter a material box 4 from the tangential direction of the upper part of the stirrer 3 to form dry sludge particles, dust with larger particles and air with dust;

Step 3, enabling air with dust to enter a cyclone dust collector 5 from the upper part of a material box 4, enabling dried sludge particles to enter a sludge collection bag through an outlet of a discharger 7 at the bottom under the action of gravity, enabling dust with larger particles to enter a small material box 53 through centrifugal sedimentation, and directly connecting the small material box 53 with an inlet of a fan 6 through a small air pipe 55, so that the small material box 53 generates a pressure difference relative to the cyclone dust collector 5, and the dust removal effect of large-particle dust is improved;

And 4, further removing dust of the air discharged by the fan through a water washing dust remover on the exhaust pipe.

The invention not only can reduce the sludge to the greatest extent and reduce the transportation cost, but also can recycle the waste after the sludge is fully dried, thereby fully embodying the environmental protection concept of energy conservation and emission reduction.

The product form of the present invention is not limited to the embodiments and examples shown in the present application, and any suitable changes or modifications of the similar ideas should be made without departing from the patent scope of the present invention.

Claims (8)

1. A vehicle-mounted sludge drying device is characterized by comprising a spiral feeder, a heat exchanger, a stirrer, a material box, a cyclone dust collector, a fan, a discharger, a burner and an exhaust pipe, wherein a discharge hole of the spiral feeder is communicated with a feed hole of the stirrer, a discharge hole of the stirrer is communicated with the side surface of the material box, the heat exchanger and the burner are respectively arranged at the bottom side of the stirrer, the burner is positioned above the heat exchanger, the cyclone dust collector is arranged at the top of the material box, the discharger is arranged at the bottom of the material box, an air inlet of the cyclone dust collector is connected with the fan, and an air outlet of the cyclone; the cyclone dust collector is of a cylindrical structure, the axis direction of the cyclone dust collector is horizontally arranged at the upper part of the material box, the rear side part of the material box is provided with an air inlet at the tangent position with the circumference, the air inlet is provided with a first guide plate which is tangentially connected with the circumference of the cyclone dust collector and is vertically arranged, and the center of the cyclone dust collector is provided with a semicircular arc plate close to the air inlet; the side of the cyclone dust collector, which is far away from the air inlet, is provided with a discharge opening tangential to the circumferential direction, and the discharge opening is connected with a small material box; the upper part of the small feed box is also directly connected with the air inlet of the fan through a small air pipe.

2. The vehicle-mounted sludge drying device of claim 1, wherein the mixer comprises a mixing drum, a mixing shaft arranged in the mixing drum and a plurality of mixing teeth arranged on the mixing shaft, the mixing drum is provided with the feeding hole and the discharging hole, the discharging hole is tangential to the circumferential direction of the mixing drum, an air inlet is arranged below the feeding hole of the mixing drum, an arc-shaped second guide plate is arranged at the air inlet, and the direction of the second guide plate is consistent with the rotation direction of the mixing shaft.

3. The vehicle-mounted sludge drying device as claimed in claim 2, wherein the stirring shaft is a hollow cross shaft, the center of the shaft is a hollow circular tube, and a plurality of connecting plates are uniformly distributed on the outer circumferential surface of the circular tube.

4. the vehicle-mounted sludge drying device as claimed in claim 3, wherein the stirring teeth are of a U-shaped structure and have semi-arc ends and parallel free ends, the semi-arc ends are fixed on the connecting plates of the stirring shaft through arc-shaped pressing plates, and the stirring teeth between the connecting plates are arranged in a staggered manner.

5. The vehicle-mounted sludge drying device as claimed in claim 2, wherein the discharge port of the mixing drum is provided with a third arc-shaped guide plate, and the concave arc of the third guide plate faces downwards.

6. the vehicle-mounted sludge drying device as claimed in claim 1, wherein the water inlet and the water outlet of the heat exchanger are respectively connected with the water outlet and the water inlet of the chassis engine.

7. The vehicle-mounted sludge drying device as claimed in claim 1, wherein the exhaust duct is provided with a water scrubber, the water scrubber is provided with spray pipes with small holes on two sides, and the direction of the small holes is perpendicular to the direction of the air flow.

8. A method of sludge drying comprising:

Step 1, conveying mud cakes generated by a dredging vehicle with a mud-water separation function into a stirrer through a spiral feeder, and cutting the mud cakes into sludge particles with uniform sizes by using stirring teeth of the stirrer;

Step 2, after being heated by the heat exchanger, the outside air is heated by the burner again to generate hot air with the temperature exceeding 150 ℃, the hot air enters the stirrer through the second guide plate, and the hot air and the wet sludge particles rotate, mix, exchange heat and dry together under the action of the airflow and the stirring shaft, and then enter the material box from the tangential direction of the upper part of the stirrer to form dry sludge particles, dust with larger particles and air with dust;

step 3, enabling air with dust to enter the cyclone dust collector from the upper part of the material box, enabling dried sludge particles to enter a sewage collecting bag through a discharger port at the bottom under the action of gravity, enabling larger-particle dust to enter a small material box through centrifugal sedimentation, and directly connecting the small material box with an air inlet of a fan through a small air pipe to enable the small material box to generate a pressure difference relative to the cyclone dust collector, so that the dust removal effect of large-particle dust is improved;

And 4, further removing dust of the air discharged by the fan through a water washing dust remover on the exhaust pipe.