CN215799116U - Sludge drying assembly line - Google Patents

Abstract

The utility model discloses a sludge drying assembly line, which comprises a spiral feeder, a primary dryer, a secondary drying tower and a solid-state separation device, wherein sludge enters the primary dryer, the secondary drying tower and the solid-state separation device which are sequentially communicated end to end through pipelines through the spiral feeder to carry out drying operation; aiming at the characteristic that the water content of the sludge entering the primary dryer is high, under the condition that the total air pressure of the system is not changed, the local air speed of the primary dryer is increased, the sludge is enabled to be gradually dried in a floating mode and smoothly enters the secondary drying tower, and aiming at the problem that the solid-state separator is easy to block in the original design, the improved cyclone separator is adopted to replace the solid-state separator, so that the problem that the separation effect is poor and the blocking is easy to occur is solved.

Description

Sludge drying assembly line

Technical Field

The utility model relates to the field of papermaking sewage treatment, in particular to a sludge drying production line.

Background

With the increasing importance of industrial production on environmental protection, the sludge produced by sewage treatment cannot be treated by a solid stacking or landfill method. The existing sludge treatment method comprises the following steps: the papermaking sewage sludge with the dryness of 30 percent is further dried by sludge drying system equipment and then directly sent into a boiler for combustion to solve the problem of stacking or landfill. The drying system is characterized in that the technical design process of the drying system is that sludge with water content of about 70% is rapidly and continuously dried, crushed and separated by using boiler tail gas, flue gas enters a bag-type dust collector, solid particles are discharged through the separator, the dried solid particles have water content of 10% -15% and heat value of 1000-1500 cal and are fed into a boiler for combustion. A specific process; the method comprises the steps of (1) papermaking sewage sludge containing 30% of water (water), feeding screw (feeding screw), primary drier crushing and primary drying (secondary drying tower), solid separator (dry mud hopper dryness 85% dry mud particles), and burning in a boiler. After passing through the solid-state separator, the flue gas enters a bag-type dust collector and is discharged into the atmosphere after being subjected to subsequent desulfurization and denitrification treatment with the boiler flue gas.

The existing sludge drying system equipment runs for a period of time, and the system has certain technical defects, mainly including 1, the sludge entering the primary drying sludge has higher water content and larger specific gravity, the sludge feeding amount is not well controlled, the sludge is easy to float and slow down along with flue gas due to larger specific gravity, and the sludge sinks to cause the blockage of the stacking of the primary dryer. 2. The solid-state separator design defect, for the design of multitube separation, the separator tube diameter is less, and the separation hole diameter is also little, causes the flue gas velocity of flow to slow down, and the separation effect reduces, causes the dry mud hopper to block up.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: overcome the not enough of prior art, through installing the axial impeller additional in the mud inlet pipe at current primary dryer, when can break up kibbling to mud, increase the wind speed, accelerate mud along with the flue gas floating speed, prevent that mud from sinking and leading to the emergence of primary dryer windrow jam condition, adopt the solid state separator among the cyclone replacement prior art simultaneously, and improve the air-out structure in the cyclone, make mud granule and flue gas reach better separation state, solve the not good easy stifled problem of separation effect.

The utility model has a technical scheme that: the utility model provides a sludge drying assembly line, includes screw feeder, drying tower and solid-state separation device, the drying tower includes primary dryer and second grade drying tower, and mud passes through screw feeder gets into and carries out end to end intercommunication in proper order primary dryer, second grade drying tower and solid-state separation device carry out drying operation, characterized by through the pipeline: the device comprises a primary dryer, a sludge inlet pipe, a solid-state separation device, a secondary drying tower, a hopper, a main flue, a cloth bag, a fan, a main flue, a fan, a booster impeller, a transmission mechanism, a transmission motor, a solid-state separation device, a cyclone separator, an air inlet pipe, a discharge hole of the secondary drying tower, a distance between the bottom plane of the air outlet pipe bottom extending into the hopper and the bottom plane of the air inlet pipe, a distance between the bottom plane of the air outlet pipe bottom extending into the hopper and the bottom plane of the air inlet pipe bottom, a distance between the bottom plane of the air outlet pipe bottom and the bottom plane of the air inlet pipe, a draught fan, and a main flue for collecting extracted flue gas, wherein the flue is discharged after dust removal through the cloth bag.

Further, the impeller includes at least three blade, and the blade encircles the fixed block and evenly fixes on it, and the fixed block can be dismantled fixedly and set up drive mechanism is last, and the blade is the plane shape and not traditional arc, and it is that inclination is 30.

Furthermore, the windward front edge of the blade is in a sawtooth shape, and a wear-resistant layer is sprayed on the surface of the blade.

Furthermore, drive mechanism includes pivot and support frame, and the pivot is fixed on one-level desicator through the support frame.

Further, the bottom of hopper is provided with the airlock.

The utility model has the beneficial effects that:

1. the axial impeller is additionally arranged in the sludge inlet pipe of the existing primary dryer, so that the air speed is increased while sludge is scattered and crushed, the floating speed of the sludge along with flue gas is accelerated, the phenomenon that the sludge sinks to cause the blockage of stockpiling of the primary dryer is prevented, meanwhile, the cyclone separator is adopted to replace a solid separator in the prior art, and an air outlet structure in the cyclone separator is improved, so that sludge particles and the flue gas are in a better separation state, and the problem that the separation effect is poor and the blockage is easy to occur is solved;

2. the blades are uniformly fixed on the fixing block in a surrounding manner, the fixing block is detachably and fixedly arranged on the transmission mechanism, the rotating mechanism drives the blades to rotate, the blades are convenient to maintain and replace due to the detachable structure, the inclination angle of the blades is 30 degrees, the blades are planar instead of traditional arc shapes, the wind speed is improved, meanwhile, the windward front edges of the blades are intensively contacted with sludge, and the sludge can be quickly smashed;

3. the windward front edge of the blade is in a sawtooth shape, so that the crushing and scattering functions of the blade are enhanced, and meanwhile, the surface of the blade is sprayed with a wear-resistant layer, so that the wear resistance is enhanced, and the service life is prolonged;

4. the rotating shaft is fixed on the primary dryer through a support frame, and the rotating shaft is rotatably connected with the support frame through a bearing, so that the stability of the rotating shaft during high-speed rotation is ensured;

5. the bottom of the hopper is provided with the air lock, so that waste gas is prevented from overflowing from the bottom, sludge particles can be discharged intermittently, and the stability of separating the sludge particles from flue gas is ensured.

Drawings

FIG. 1 is a schematic view of a sludge drying line.

FIG. 2 is a schematic diagram of the cyclone separator.

Fig. 3 is a schematic diagram of the impeller configuration in the primary dryer.

Fig. 4 is a circuit diagram of the impeller, the transmission mechanism, and the transmission motor.

Detailed Description

Example (b): see fig. 1, 2, 3 and 4; in the figure, 1-a screw feeder, 2-a pipeline, 3-a primary dryer, 4-a secondary drying tower, 5-a solid separation device, 6-an impeller, 7-a transmission mechanism and 8-a transmission motor; 31-a sludge inlet pipeline, 51-an air inlet pipeline, 52-a hopper, 53-an air outlet pipeline, 54-an induced draft fan and 55-an air locker; 61-blade, 62-fixed block; 71-rotating shaft, 72-supporting frame; a-a sludge inlet and B-a high-temperature flue gas inlet.

A sludge drying production line comprises a spiral feeder, a primary drying tower, a secondary drying tower and a solid-state separation device, wherein sludge enters a primary dryer, the secondary drying tower and the solid-state separation device which are sequentially communicated end to end through pipelines through the spiral feeder to carry out drying operation; aiming at the characteristic that the water content of the sludge entering the primary dryer is high, under the condition that the total air pressure of a system is not changed, the local air speed of the primary dryer is increased, the sludge is enabled to be gradually dried in a floating mode, the sludge smoothly enters the secondary drying tower, the original solid-state separator is omitted, and the cyclone separator is newly designed and manufactured aiming at the problem that the separation effect is poor and the blockage is easy to occur.

The present application will be described in detail below with reference to the drawings and examples.

The first embodiment is as follows:

sludge enters a primary dryer 3, a secondary drying tower 4 and a solid-state separation device 5 which are sequentially communicated end to end through a pipeline 2 through a screw feeder 1 for drying operation, a supercharging and crushing impeller 6 is axially arranged in a sludge inlet pipeline 31 of the primary dryer 3, the impeller 6 is linked with a transmission motor 8 arranged outside the primary dryer 3 through a transmission mechanism 7, the solid-state separation device 5 is a cyclone separator, an air inlet pipeline 51 of the cyclone separator is communicated with a discharge port of the secondary drying tower 3, the distance between the bottom plane of the bottom of an air outlet pipeline 53 extending into a hopper 52 and the bottom plane of the air inlet pipeline 51 is increased to 2300mm-2500mm (preferably 2400mm, the length of the air outlet pipeline 53 in the hopper 52 is increased and is more than one time longer than that of the air outlet pipeline in the hopper of a common cyclone separator, so that sludge particles and smoke gas are well separated), the top of the air outlet pipeline 53 is communicated with a draught fan 54, the extracted flue gas is converged into the main flue and is discharged after being subjected to cloth bag dust removal.

Install axial impeller 6 additional in the mud inlet pipe of current primary dryer 3, when can break up kibbling to mud, increase the wind speed, accelerate mud along with the velocity of floating of flue gas, prevent that mud from sinking and leading to the emergence of the 3 windrow jam circumstances of primary dryer, adopt the solid state separation ware among the cyclone replacement prior art simultaneously, and improve the air-out structure in the cyclone, make mud granule and flue gas reach better separation state, solve the not good easy stifled problem of separation effect.

The transmission mechanism 7 comprises a rotating shaft 71 and a support frame 72, and the rotating shaft 71 is fixed on the primary dryer 3 through the support frame 72; and the rotating shaft 71 is rotatably connected with the support frame 72 through a bearing, so that the stability of the rotating shaft 71 in high-speed rotation is ensured.

Wherein, the bottom of the hopper 52 is provided with an air lock 55; the waste gas is prevented from overflowing from the position, the sludge particles can be discharged intermittently, and the stability of separating the sludge particles from the flue gas is ensured.

Example two:

the present embodiment is obtained by further describing technical features of the impeller 6 and the like on the basis of the first embodiment, and the remaining technical features are the same as the first embodiment, and the same points are not described herein, wherein the detailed description of the added technical features is as follows: impeller 6 includes at least three blade 61, and blade 61 surrounds fixed block 62 and evenly fixes on it, and fixed block 62 can dismantle fixed the setting on drive mechanism 7, and the blade is the plane shape rather than traditional arc, and it is that inclination is 30.

At least three (preferably 6) of blade 61, blade 61 encircles fixed block 62 and evenly fixes on it, fixed block 62 can be dismantled fixedly and set up on drive mechanism 7, it rotates to realize slewing mechanism drive blade 61, detachable construction, be convenient for maintain the change operation to blade 61, blade 61 inclination is 30, and blade 61 is the plane shape and non-traditional arc, when having guaranteed to improve the wind speed, still make blade 61's windward leading edge concentrate and contact with mud, can smash the operation to mud fast.

Example three:

the embodiment is obtained by adding technical features such as sawteeth and a wear-resistant layer on the basis of the second embodiment, and the rest technical features are the same as the second embodiment and are not described here, wherein the detailed description of adding the technical features is as follows: the windward front edge of the blade 61 is in a sawtooth shape, and a wear-resistant layer is sprayed on the surface of the blade 61.

The windward front edge of the blade 61 is in a sawtooth shape, so that the crushing and scattering functions of the blade are enhanced, and meanwhile, the surface of the blade 61 is coated with a wear-resistant layer, so that the wear resistance is enhanced, and the service life is prolonged.

When the device is used, sludge enters the primary dryer 3, the secondary drying tower 4 and the solid separation device 5 which are sequentially communicated end to end through the pipeline 2 through the spiral feeder 1 to be dried.

When sludge enters the sludge inlet pipeline 31 of the primary dryer 3, under the action of the impeller 6, the sludge is crushed and mixed with pressurized air to form a flue gas particle mixture, then the flue gas particle mixture sequentially enters the primary dryer 3 and the secondary drying tower 4, under a certain state of air pressure of the induced draft fan 54, the dried flue gas particle mixture enters the air inlet pipeline 51 of the cyclone separator from the discharge port of the secondary drying tower 4 at a certain flow rate and then enters the hopper 52 of the cyclone separator from the air inlet pipeline 51, and the volume of the hopper 52 of the cyclone separator is suddenly increased to generate diffusion effect, so that sludge particles are rapidly settled and fall into the bottom of the hopper 52, and the air locker 55 is arranged at the bottom of the separator to intermittently discharge sludge particles. The flue gas is pumped out by a draught fan 54 through a low-pressure air outlet pipeline 53 and flows into a main flue, and is discharged after being dedusted by a cloth bag.

The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention.

Claims (5)

1. The utility model provides a sludge drying assembly line, includes spiral feeder, drying tower and solid-state separation device, the drying tower includes primary dryer and second grade drying tower, the discharge gate of spiral feeder pass through the pipeline with the feed inlet of primary dryer is connected, primary dryer, second grade drying tower and solid-state separation device connect gradually characterized by through the pipeline: the axial is provided with pressure boost and broken impeller in the mud inlet pipe of one-level desicator, the impeller pass through drive mechanism and arrange in the outer transmission motor linkage of one-level desicator, solid-state separation device is cyclone, and its intake stack communicates with the discharge gate of second grade drying tower, and stretches into the base plane distance of the play air conduit bottom in the hopper and intake stack and increase to 2300mm-2500mm, stretches into play air conduit top and draught fan intercommunication in the hopper.

2. The sludge drying line of claim 1, wherein: the impeller includes at least three blade, and the blade encircles the fixed block and evenly fixes on it, and the fixed block can be dismantled fixedly and set up drive mechanism is last, and the blade is the plane shape and not traditional arc, and it is inclination and is 30.

3. The sludge drying line of claim 2, wherein: the windward front edge of the blade is in a sawtooth shape, and a wear-resistant layer is sprayed on the surface of the blade.

4. The sludge drying line of claim 3, wherein: the transmission mechanism comprises a rotating shaft and a supporting frame, and the rotating shaft is fixed on the primary dryer through the supporting frame.

5. The sludge drying line of claim 1, wherein: and an air lock is arranged at the bottom of the hopper.

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