CN201293534Y

CN201293534Y - Triaxial and three-box hollow blade sludge drier

Info

Publication number: CN201293534Y
Application number: CNU200820185181XU
Authority: CN
Inventors: 王福才
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-08-26
Filing date: 2008-08-26
Publication date: 2009-08-19
Anticipated expiration: 2018-08-26

Abstract

The utility model relates to a three-shaft three-box hollow blade sludge dryer. According to the sludge characteristic and the variation feature of sludge in the drying process, the sludge dryer includes parallel three-shaft three-box hollow blade sludge drying boxes, heat-insulating layers are provided both on the outer layer and bottom layer of the drying cabinets; the box body is provided with sludge ingress and egress, heat conducting oil ingress and egress, hot air ingress and aqueous vapor egress; the dry sludge egress is designed into a cylinder shape, and a spiral propulsion discharging device is provided in the dry sludge egress; additionally a heating stove is provided for heating. The utility model has the advantage of: 1. the sludge volume is gradual reduced in the drying process and the sludge moisture percentage is dropped from 80% to 20%, the general reduction is more than two thirds of its former volume, so the volume of the three drying boxes, shaft diameter, and the blade size, and the heating surface in the boxes are also gradual reduced, so that the sludge is always contact with the heating surface in the drying process, and the heat use ratio is improved; 2. the heat-insulating layers are provided on the outer layer of the drying boxes and the heating stove; 3. the heating surface and hot air in the drying box simultaneously heat the sludge and prompt the convection of air and aqueous vapor in the box to improve the drying velocity; 4. three-shaft three boxes allow the sludge to have sufficient residence time in the boxes, combined with checks and sludge export device, the drying quality of the sludge can be ensured, and has high thermal efficiency and low drying cost. The sludge dryer has compact, reasonable and novel design, small floor area and comparative practicality.

Description

Three three casees hollow blade sludge driers

Technical field

The utility model relates to a kind of three three casees hollow blade sludge driers.

Background technology

The mud about 9,000,000 tons (about moisture content 80%) of the existing sewage treatment plant in China cities and towns generation at present, estimate that will produce about 2,700 ten thousand tons of new mud every year in the coming five years, following 10 years be wastewater treatment in China factory build golden age, will produce more mud every year; How mud is handled, disposed, now become a big environmental protection difficult problem of China.In order to make sewage sludge harmlessness, resource better, turn harm into good, turn waste into wealth, developed country is just requiring the moisture content of mud is dropped to about (20-30) % at present, that is to say that the mud that sewage treatment plant comes out must at first carry out mummification; And the hollow blade drying machine is one of capital equipment of drying sludge, but present hollow blade drying machine does not use when therefore really being used for drying sludge owing to not having characteristic and the variation characteristic and the actual needs of mud in dry run at mud to design.Characteristic at mud: complicated component, viscosity is big, moisture content is high, and moisture content is difficult for evaporation; Volume Changes is big in dry run, along with the evaporation of moisture content, will reduce more than 2/3rds from being fed to the general volume of discharging; Through our practice, in esse problem in the present drying sludge process, we designed economical, efficiently, three three casees hollow blade sludge driers relatively using.

The utility model content

The utility model purpose be to provide a kind of at sludge characteristics and mud the variation characteristic in drying process, thermal efficiency height, drying cost is low, guarantee the drying sludge quality, compact to design, reasonable, novel, floor space is little, relatively three three casees hollow blade sludge driers of Shi Yonging.

The utility model is a kind of three three casees hollow blade sludge driers, it is characterized in that:

A) three three the casees be arranged side by side, and the size of the volume of casing, the diameter of axle, blade and the case inner heating surface is long-pending reduces gradually;

B) drying box (1) is provided with mud import, heat conductive oil inlet, steam outlet; Drying box also can be established double-shaft paddle in (1); Drying box (2) one ends are provided with the hot blast import; Drying box (3) is provided with dewatered sludge outlet, conduction oil outlet.

The purpose of this utility model realizes by following measure: 1, at sludge characteristics, mud its volume in dry run reduces gradually, generally will reduce more than 2/3rds, so three three casees dryings are set; The size of the volume of drying box, the diameter of axle, blade, case inner heating surface amass and also reduce gradually, and purpose is to make mud to contact with heating surface all the time in dry run comprehensively and closely, improve the utilization rate of heat.2, three casees whole skins (containing bottom) are equipped with heat-insulation layer.3, adopt conduction oil or steam and hot blast simultaneously mud to be heated, and impel interior air of drying box and steam to quicken convection current to improve rate of drying.4, three can make mud that enough time of staying are arranged in case three the casees, in addition the dewatered sludge outlet be designed to cylindric, in establish the dry mass that the screw propulsion drawing mechanism is guaranteed mud.

Advantage of the present utility model is: thermal efficiency height after having taked above-mentioned measure, guarantee drying effect, and drying cost reduces; The utility model is compact to design, reasonable, novel, and floor space is little, relatively uses.

Description of drawings

Fig. 1 is the internal structure schematic diagram of three three casees hollow blade sludge driers of the utility model

1, first drying box, 2, second drying box, the 3, the 3rd drying box, 4, heat-insulation layer, 6, the dewatered sludge outlet, 7, heat conductive oil inlet, 8, the conduction oil outlet, 9, conduction oil, 10, the hot blast import.

Fig. 2 is the first drying box vertical cut-away schematic view

5, mud import, 11, steam outlet.

Fig. 3 is three three casees hollow blade sludge drier lateral vertical generalized sections

12, hollow blade, 13, paddle shaft, 14, the interlayer between drying machine bottom and the drying box.

Fig. 4 is the heating furnace of drying machine

15, oil-out, 16, oil return opening, 17, hot-blast outlet, 18, heating furnace.

The specific embodiment

The utility model embodiment in conjunction with the accompanying drawings is described in further detail.

Referring to Fig. 1 embodiment, wet mud is entered in the drying box 1 by mud import 5, rolls along direction of arrow limit among the figure, broken limit advances, and drying case 2 enters drying box 3 then, after dewatered sludge exports 6 dischargings.9 oil-outs 15 from heating furnace 18 of conduction oil come out, through heat conductive oil inlet 7 enter respectively drying machine the axle 13 in, in the blade 12 and in the interlayer 14, constitute the case inner heating surface jointly mud heated; Return heating furnace by conduction oil outlet 8 through oil return opening 16.Hot blast comes out to enter drying box 2 through hot blast import 10 from the hot-blast outlet 17 of heating furnace 18 and enters drying box 1 and case inner heating surface then and jointly mud is heated and improves that the convection current of air and steam improves rate of drying in the temperature inside the box, the accelerating chamber, is discharged by steam outlet 11 at last.

The utility model no matter whole outer still heating furnace body of three drying boxes of sludge drier is equipped with heat-insulation layer 4, to reduce the loss of heat, improves the utilization rate of heat.Cylindric its interior employing spiral pushing device discharging is arranged in dewatered sludge outlet 6 as seen from Figure 1 in addition, controls the particle diameter and the drying effect of dewatered sludge with this.

Drying box

2 and 3 volume, the diameter of axle, paddle size and heating surface (area) (HS all reduce than drying box 1 as seen from Figure 3, so that mud contacts with heating surface in whole dry run all the time comprehensively and closely, improve the thermal efficiency with this.

Present embodiment Fig. 4 is for providing the heating furnace of thermal source to drying machine.Heating furnace 18 usefulness fuel gas or coal are made fuel and all can; Also available electrical heating conduction oil 9, only during electricity consumption, drying machine hot blast import 10 will be closed.The also available steam of the utility model directly heats drying machine, and hot blast import meanwhile 10 will be closed.

Claims

1, a kind of three three casees hollow blade sludge driers is characterized in that:

2, three three casees hollow blade sludge driers according to claim 1, it is characterized in that: three casing skins, bottoms are equipped with heat-insulation layer.

3, three three casees hollow blade sludge driers according to claim 1 is characterized in that: dewatered sludge outlet is designed to cylindric, in establish the screw propulsion drawing mechanism.