Two thermal source multiscrew material drying device
Technical field
The present invention relates to the spiral transmission dry materials mode of a kind of pair of thermal source multiscrew, be mainly used in sludge of sewage treatment plants and handle the drying of solid materialss such as some farm crop.
Background technology
What present sewage work more than 80% adopted all is activated sludge process, and its maximum drawback is exactly to produce a large amount of excess sludges when disposing of sewage.Even also more than 80%, also need further drying and other treatment through its water ratio after the processed, therefore press for a kind of energy-efficient drying sludge treatment facility.
The initial calorific value that the existing drying plant that is used for solid materials, single source cause is low, and primary drying is insufficient, and HU is low, and energy consumption is high, and heat exchanger time is wayward, and automation degree of equipment is not high.Owing to heat exchange system space reason, surperficial boil-off rate is low with inner wet part rate of diffusion, and accurate inadequately to the water ratio control degree of handling the back material, the quality of discharging is not high.
Thermal source is mainly derived from residual heat from boiler fume perhaps directly with fuel or electric energy heating in the existing dry technology, and boiler smoke needs follow-up flue gas to handle, and direct heating consumes a large amount of energy again, and is all undesirable aspect cost and environment protection.
Summary of the invention
The purpose of the present invention's invention is the weak point to above-mentioned prior art existence, and a kind of spiral transmission dehumidification system efficient, control easily is provided.
The object of the invention can be realized through following measure: a kind of pair of thermal source multiscrew material drying device is characterized in that: comprise shell 20, screw device 1,3,23, housing 20, driving screw 3 and sub-screw (1; 23) in shell 20, be arranged in parallel, driving screw drives through main motor 9, and sub-screw (1,23) is through auxiliary-motor (8; 21) drive, main motor 9 and auxiliary-motor (8,21) are located at shell 20 right ends respectively, and shell 20 tops are provided with gas pipe line 7; 22, gas pipe line (7,22) connects inlet mouth 15, arranges hot oil pipeline 4 in the chuck 14 of shell 20; Said oil pipeline adopts and lays around mode, and hot oil pipeline 4 one ends connect oil-in 17, one ends and connect oil outlet 16; Be distributed in around the screw rod, shell 20 1 end tops are provided with opening for feed 6, and the other end bottom is provided with discharge port 5.
Be provided with accumulation storehouse 30 in opening for feed 6 bottoms, the other end is provided with near feed opening 5 places piles up storehouse 29.
Dual power supply multiscrew material drying device is provided with pressure transmitter 26 at accumulation Cang29Chu.
Blade 2 on the screw rod adopts arc and has sawtooth.
The material drying device of two thermal source multiscrews; Air chest 13, fuel tank 12, sun power 18; Two thermal source multiscrew material drying device; Be provided with oil-in 17 and be connected with fuel tank 12, be provided with hot air inlet 15 and be connected with air chest 13, fuel tank 12 all is connected to sun power 18 with air chest 13 and forms two thermal source multiscrew material drying systems.
Compared with prior art, the present invention has following advantage and effect:
(1) two thermals source of being made up of hot gas and deep fat have improved the drying efficiency of system.
(2) this system cooperates auxiliary electric power heating unit to remedy the thermal source problem under the insufficient condition of illumination condition.
(3) adopt major-minor spiral to transmit material, and material can transmit by positive and negative both direction under the control of major-minor motor, the time that material stops in heat exchanger increases, and has improved the utilization ratio of heat.
The damp-heat air of (4) discharging is heated as thermal source backflow oil dropping apparatus, has improved utilization efficiency of energy.
(5) blade on the screw rod adopts camber line shape and has sawtooth and can effectively cut mud.
(6) housing is provided with for two sections and piles up the storehouse, and through pressure transmitter control accumulating amount, thereby the transmission of regulating major-minor motor makes the mud thorough drying.
Description of drawings
Fig. 1 is the process flow sheet of system.
Fig. 2 is the diagrammatic cross-section of spiral dehumidification system.
Fig. 3 is the layout n. of screw rod and blade.
Fig. 4 is the left view of spiral system.
Among the figure: 1,23-sub-screw; The 2-blade; The 3-driving screw; The 4-hot oil pipeline; The 5-discharge port; The 6-opening for feed; 7,22-gas pipe line; 8,21-auxiliary-motor; 9-master's motor; The 10-transfer pump; 11-electric power heating unit; The 12-fuel tank; The 13-air chest; The 14-chuck; The 15-hot air intake; The 16-oil outlet; 17 oil-ins; 18-sun power; 19 airs; The 20-housing; 24-drum-type blower fan; The 26-transmitter; 29,30-piles up the storehouse.
Embodiment
The invention provides the material drying system of a kind of pair of thermal source multiscrew, its structure is as shown in Figure 1.
As shown in Figure 1; It is the synoptic diagram of the two thermal source multiscrew material drying device of the present invention; He comprises screw device 1,3,23, housing 20, chuck 14, main motor 9 and auxiliary-motor (8,21); Said screw device is through the major-minor electric machine control, and it comprises forward driving motor, reversing drive motor, shaft coupling, step-down gear, head bearings device, tail bearing device, transfer lime, support tube, helical member and opening for feed 6, discharge port 5.Wherein three screw rods are arranged in parallel, main helical feed screw rod forward transmits material, two sub-screw reversing drive, control material reverse transfer.
Material is by in the opening for feed access to plant near main motor side; Because action of gravity is fallen, slowly to the left transmission, the solid accumulation that falls when transmitting beginning is in the accumulation storehouse 30 of opening for feed bottom by main motor screw 3 for partial material; Be sent to the accumulation storehouse 29 of the other end when material; And pressure transmitter 26 regulation and control auxiliary-motors (1,23) started after the accumulation of a certain amount of a was arranged, and this moment, speed was higher than driving screw 3, after the mud in piling up storehouse 29 is reduced to a certain amount of b; Main motor 9 speed-raisings of pressure transmitter 26 regulation and control; Make the transfer rate of driving screw 3 be higher than sub-screw (8,21), the material in piling up storehouse 29 once more behind the amount of the reaching a discharge port 5 open blowing once, thereby get into next samsara.Regulate the residence time of material in heat exchange system.When reaching the ridity that needs, material discharges through discharge port 5.Filler when piling up mud remaining in the storehouse and can be used as next drying sludge.
Lay two hot gas ducts (7,22) on the top of housing, the high temperature air after solar heating gets into the heat exchangers from the inlet mouth 15 of one section of housing, and discharge equally distributed air outlet from the pipeline again, and material is carried out drying.Damp and hot air can be discharged from system under the drive of rolling circle cylinder 24 from hull outside with material.
Arrange hot oil pipeline 4 in the chuck 14 of housing 20, said oil pipeline adopts and lays around mode, is distributed in around the screw rod, thereby realizes the even heating of material dry.The deep fat that process sun power 18 heated from inlet 17 accesss to plant of interlayer one end, is realized recycle by the oil outlet 16 of the other end by hot oil pipeline 4 again in the drive refluxed oil-feed tank 12 of transfer pump (10).
Feed a solar energy water circulating line in the fuel tank; Utilize the oil in the water indirect heating fuel tank of solar heating; Simultaneously also have electric power heating unit 11, under the not abundant condition of sunlight, when the energy that sun power provides can not satisfy the demand of dehumidification system in the bottom of fuel tank; Can heat oil through electric power, guarantee the normal operation of oil drying.