CN103256799B - indirect heating type drying device - Google Patents

Abstract

Even if the invention provides a kind of dried object to subtract appearanceization along with the progress of drying process and the filling rate of the dried object in housing also can be made high and the indirect heating type drying device of homogenising.Described indirect heating type drying device carrys out dried object in heated shell indirectly to carry out drying process by making heat medium at the internal circulation of rotating shaft (4) and agitator (20), wherein, agitator (20) is formed as wedge type, have towards the toe lateral of housing (S1) and along with direction of rotation (M) front side from rotating shaft (4) leading section (20c) towards direction of rotation (M) rear side rearward end (20d) and gradually to the first aerofoil (20a) that the toe lateral (S1) of housing tilts, towards the rear portion side (S3) of housing and second aerofoil (20b) orthogonal with the axis (O1) of rotating shaft (4).

Description

Indirect heating type drying device

Technical field

The present invention relates to the indirect heating type drying device processed for carrying out drying (minimizing moisture) to the dried object of various biological substance or the saturation state such as sewage sludge, castoff.

Background technology

In the past, carry out resource effectively being utilized to the various biological substances processed as discarded object, such as directly burn biological substance utilize its heat energy to carry out generating electricity or carry out gasification also thermal decomposition and manufacture biomass fuel, the carbide etc. such as methyl alcohol to biological substance.When such as above-mentioned direct burning biological substance or gasification is carried out to it and thermal decomposition and resource time, need to use drying device to carry out biological substance drying to be treated to the pre-treatment of below regulation moisture content.Further, the dry sewage sludge of drying device, plant chimney stalk mud, castoff/garbage, fecaluria mud, livestock waste, plant expressed juice residue the like waste (dried object of saturation state) also will be utilized to carry out subtracting appearanceization, resource.

And as this drying device many uses indirect heating type drying device.This indirect heating type drying device A is such as shown in Fig. 9 and Figure 10, comprise housing 1, outer cover (jacket) 2, rotating shaft 4, multiple agitator (agitating plate) 5, its middle shell 1 has the container that cross section is the bottom of roughly U-shaped, outer cover 2 is arranged in the mode of the outer surface of the bottom side of covering shell 1, and by making steam, thermal medium oil, the heat mediums such as warm water circulate and heated shell 1 (and then heating dried object), the mode that rotating shaft 4 arranges along the fore-and-aft direction T of housing 1 with axes O 1 direction is from the toe lateral S1 (upstream side of the flow direction W of dried object of housing 1, end side) run through and be set to rear portion side S3 (downstream, another side) inside, rotate around axes O 1 under the driving of the rotating driving devices such as engine 3, inner circumferential end is connected to rotating shaft 4 by multiple agitator (agitating plate) 5, with the radial direction at axes O 1 center to rotating shaft 4, outstanding and central angle θ 1 is about 100 ~ 140 ° mode is circumferentially formed as roughly fan-shaped (first quarter moon shape) (such as with reference to patent document 1, patent document 2, patent document 3).

Housing 1 has the outlet 7 of the input port 6 of input dried object and the dried object after rear portion side S3 has the dried process of discharge at toe lateral S1, and housing 1 is configured in the position above rear portion side S3 mode with toe lateral S1 is obliquely installed with the tilt angle theta 2 specified together with rotating shaft 4.In addition, in indirect heating type drying device A, usually such as at 2 rotating shafts (multiple rotating shaft) 4 that the oriented direction opposite each other (direction of rotation M) of the inner transverse spread configuration of housing 1 rotates.In the same position in axes O 1 direction of each rotating shaft 4, circumference sky along axes O 1 center is equipped with 2 fan-shaped agitators 5 with opening specified gap (stream opening 10), a pair agitator 5 these being configured in the same position in axes O 1 direction is set to one-level, at each rotating shaft 4, a pair agitator 5 of multistage (n1, n2...n10) is set from the toe lateral S1 of housing 1 to rear portion side S3 along axes O 1 direction with separating predetermined distance.In addition, rotating shaft 4 and agitator 5 are formed as hollow form, make to add hot fluid at internal circulation to heat the dried object contacted.

In addition, as agitator 5, have employed the shape of straight type (ス ト レ mono-ト type), apsacline, wedge type these three kinds representative.The agitator of straight type is formed as flat fan-shaped, projecting along the direction orthogonal with the axes O 1 of rotating shaft 4.That is, the agitator of this straight type arranges with the first aerofoil 5a of the upstream side towards toe lateral S1 with towards the mode that the second aerofoil 5b in the downstream of rear portion side S3 is orthogonal with the axes O 1 of rotating shaft 4 respectively.The agitator of apsacline is formed as flat fan-shaped in the same manner as the agitator of straight type, and is arranged to the first aerofoil 5a and the second aerofoil 5b and tilts to intersect with the axes O 1 of rotating shaft 4.

The agitator 5 of wedge type is usually as Fig. 9 and Figure 11 (Figure 11 (a): the front view observed from the radial outside of rotating shaft, Figure 11 (b): the expanded view of rotating shaft and agitator) shown in, first aerofoil 5a tilts to the toe lateral S1 on axes O 1 direction of rotating shaft 4 towards rearward rearward end 5d gradually along with the leading section 5c in the direction of rotation M front from rotating shaft 4, second aerofoil 5b tilts to the rear portion side S3 on axes O 1 direction of rotating shaft 4 towards rearward rearward end 5d gradually along with the leading section 5c in the direction of rotation M front from rotating shaft 4, be formed as described leading section 5c thus tapering and along with width dimensions becomes the wedge type of large isosceles triangle gradually from leading section 5c towards rearward end 5d.

In the indirect heating type drying device A formed as described above, heat medium is circulated with heated shell 1 in outer cover 2, in addition, make heat medium at the internal circulation of rotating shaft 4, agitator 5 to heat rotating shaft 4, agitator 5, and make rotating shaft 4 rotate and make multiple agitator 5 at the internal rotating of housing 1.Further, when the dried object of saturation state is internally dropped in the input port 6 of the toe lateral S1 from housing 1, agitator 5 utilizes the rotation of rotating shaft 4 and cuts in dried object, dried object is repeatedly uniformly mixed.In addition, because housing 1 tilts, therefore dried object to be moved from the downstream of the upstream side of toe lateral S1 posteriorly side S3 by heating on one side successively by the stream opening 10 of the circular gap of a pair agitator 5 of (n1...n10) at different levels.Like this, by from toe lateral S1 successively posteriorly side S3 move and be stirred the wing 5 and be uniformly mixed, dried object along with towards rear portion side S3 by dry (minimizing moisture) process successively, and to discharge from outlet 7 with the state of drying process to desired moisture content.

In addition, when possess isosceles triangle wedge type agitator 5, because the leading section 5c of the direction of rotation M front side of agitator 5 is tapering, therefore the incision to dried object is good, resistance when entering in dried object is low, effectively dried object is uniformly mixed and reduces the attachment of dried object to agitator 5.Thereby, it is possible to effectively carry out drying process to dried object.

[at first technical literature]

[patent document]

[patent document 1] Japanese Unexamined Patent Publication 3-137998 publication

[patent document 2] Japanese Patent Publication 1-88800 publication

[patent document 3] Japanese Patent Publication 48-44432 publication

But, in above-mentioned existing indirect heating type drying device A, such as shown in Figure 12, along with from the toe lateral S1 in housing 1 posteriorly side S3 move, the moisture of dried object P evaporates and the volume of dried object P reduces, therefore relative to toe lateral S1, the pars intermedia S2 of dried object P in housing 1 or the filling rate step-down of rear portion side S3.

In addition, when possess isosceles triangle wedge type agitator 5, first aerofoil 5a along with from leading section 5c towards rearward end 5d gradually anteriorly side S1 tilt, therefore as shown in figure 11, when this agitator 5 is cut in dried object P, by the first aerofoil 5a effect by the dried object P anteriorly power F1 that oppositely carries of side S1.But, in the agitator 5 of the wedge type of isosceles triangle, second aerofoil 5b along with from leading section 5c towards rearward end 5d gradually posteriorly side S3 tilt, and by the power F2 of this second aerofoil 5b effect by dried object P posteriorly side S3 conveying, the carrying capacity F2 that the second aerofoil 5b of the agitator 5 of the reverse conveying propulsive force F1 that the first aerofoil 5a of the agitator 5 of therefore adjacent on axes O 1 direction of rotating shaft 4 side produces and the opposing party produces offsets.Thus, though when possess isosceles triangle wedge type agitator 5, relative to toe lateral S1, the filling rate of the pars intermedia S2 of dried object P in housing 1 or rear portion side S3 still can step-down.

And, as shown in figure 12, due to the filling rate step-down of the pars intermedia S2 in housing 1 or rear portion side S3 dried object P, therefore more from toe lateral S1 posteriorly side S3 carry, the thermal conductive surface in agitator 5, rotating shaft 4 and housing 1 more can not contact with dried object P and significantly expose.Namely, in above-mentioned existing indirect heating type drying device A, along with the drying process of dried object P, wasted space is produced in housing 1, and then, produce useless heat radiation (empty burn) from the thermal conductive surface in the agitator 5 exposed, rotating shaft 4 and housing 1, exist thermal losses greatly, even drying efficiency reduce such problem.

In other words, in above-mentioned existing indirect heating type drying device A, owing to possessing necessary above large heat-conducting area (heat-conducting area of housing 1 and agitator 5), device A therefore can be caused to maximize such unfavorable condition.

On the other hand, as shown in figure 13, indirect heating type drying device A: the rear portion side S3 in housing 1 also with following structure is provided with baffle plate (ejection door) 11, the dried object P ' (P) utilizing this baffle plate 11 temporarily to block to have carried out dry process, the dried object P ' crossing baffle plate 11 discharges (with reference to patent document 1, patent document 2) from outlet 7.Further, in this indirect heating type drying device A, block owing to utilizing baffle plate 11 and carried out the dried object P ' of dry process, therefore, it is possible to improve the filling rate of rear portion side S3.

But, even if when possessing baffle plate 11 like this, also cannot maintain high fill-ratio from toe lateral S1 equably to rear portion side S3, the filling rate of the pars intermedia S2 of housing 1 can step-down, and the thermal conductive surface of the housing 1 of this pars intermedia S2 or rotating shaft 4, agitator 5 can expose.Therefore, along with the drying process of dried object P, still can produce wasted space by the pars intermedia S2 in housing 1, produce useless heat radiation from the thermal conductive surface in the agitator 5 exposed, rotating shaft 4 and housing 1, thus produce large thermal losses, and then produce drying efficiency reduction.

Summary of the invention

The present invention proposes in view of the foregoing, even if its object is to provide a kind of dried object to subtract appearanceization along with the progress of drying process, the filling rate of the dried object in housing also can be made high and the indirect heating type drying device of homogenising.

The indirect heating type drying device that the present invention relates to possesses: housing, it is formed with the input port of dropping into dried object in toe lateral, be formed with the outlet of the dried object after discharging dried process in rear portion side, the mode that this housing is configured in the position higher than rear portion side with toe lateral is obliquely installed, rotating shaft, it runs through the inside being set to rear portion side from the toe lateral of described housing, and axis direction is towards the fore-and-aft direction of described housing, and described rotating shaft can rotate about the axis, multiple first agitator, it is also circumferentially formed as roughly fan-shaped from the outer peripheral face of described rotating shaft to radial outside is outstanding, described multiple first agitator arranges multistage along the axis direction sky of described rotating shaft with opening predetermined distance, described indirect heating type drying device carries out drying process by making heat medium carry out the dried object in housing described in indirect at the internal circulation of described rotating shaft and described first agitator, it is characterized in that, possesses the second agitator of wedge type, this second agitator has: the first aerofoil, it is towards the toe lateral of described housing, and along with the direction of rotation front side from described rotating shaft leading section towards direction of rotation rear side rearward end and tilt to the toe lateral of described housing gradually, second aerofoil, it is towards the rear portion side of described housing, and with the axis vertical take-off of described rotating shaft.

In the present invention, under the state making heat medium circulation come heated shell, rotating shaft, agitator, rotating shaft is made to rotate and in the inside of housing, multiple agitator be rotated, the dried object of saturation state is dropped into from input port, now dried object is uniformly mixed by agitator at different levels, and carry out heat exchange between heat medium, thus the evaporation of the moisture of dried object can be made to carry out drying process.

And, now, first aerofoil along with the direction of rotation front side from rotating shaft leading section towards direction of rotation rear side rearward end and tilt to the toe lateral of housing gradually, the axis vertical take-off of the second aerofoil and rotating shaft, thus agitator is formed as the wedge type of right angled triangle.Therefore, different from the agitator of the wedge type of existing isosceles triangle, when the agitator of the wedge type of this right angled triangle rotates and to enter from tapering leading section (incision) dried object and to be uniformly mixed, dried object is made to return toe lateral (side, input port, return to side) and the reverse conveying propulsive force of oppositely carrying by the first aerofoil effect, relative to this, due to the plane that the second aerofoil is rectangular with axis, therefore can not act on will by dried object posteriorly side (outlet side, conveyor side) carrying capacity of carrying.Thus, by possessing the agitator of the wedge type of right angled triangle, thus compared with existing indirect heating type drying device, even if the angle of inclination of housing is identical, dried object also can be slack-off by the speed of withering movement simultaneously at the input port lateral row outlet side from housing, and the filling rate of the dried object from the toe lateral in housing to rear portion side can be made thus to be high fill-ratio and homogenising.

In addition, even if agitator to be formed as the wedge type of right angled triangle, the tapering degree of leading section is also maintained same degree with the tapering degree of the leading section of the agitator of the wedge type of existing isosceles triangle, therefore the mixing effect of the incision effect to dried object, dried object can not be lost, the low dynamics same with the agitator of the wedge type of existing isosceles triangle can be maintained, and the reverse conveying effect of dried object can be obtained.

In addition, preferably in indirect heating type drying device of the present invention, when the rear portion side of described housing be provided with temporarily block from toe lateral carried out dry process and meanwhile the baffle plate of dried object of movement, second agitator with the wedge type of described first aerofoil and described second aerofoil is disposed in the pars intermedia between the toe lateral of described housing and rear portion side, when not arranging described baffle plate, second agitator with the wedge type of described first aerofoil and described second aerofoil is disposed in pars intermedia and the rear portion side of described housing.

Here, in the present invention, " toe lateral of housing, pars intermedia, rear portion side " represents the region of the toe lateral length of interval trisection of the fore-and-aft direction of the input port from housing to outlet formed, the region of mid portion of toe lateral and rear portion side, the region of rear portion side respectively.

Or, when all agitators adopt the agitator of the wedge type of straight type, apsacline, isosceles triangle and arrange baffle plate to form indirect heating type drying device, the region of the mid portion of the filling rate (setting of pre-set filling rate) lower than regulation is set to " pars intermedia ", being set to than this " pars intermedia " region by side, input port " toe lateral ", being set to from " pars intermedia " region to baffle plate (when not arranging baffle plate from " pars intermedia " region to outlet) " rear portion side ".

In the present invention, the pars intermedia of the housing that the filling rate by the presence or absence according to baffle plate optionally in dried object easily reduces along with the progress of the drying process of dried object or rear portion side configuration have described first aerofoil and described second aerofoil and are formed as the agitator of the wedge type of right angled triangle, can reliably and effectively make the filling rate of dried object be high fill-ratio and homogenising thus.

And then, preferably in indirect heating type drying device of the present invention, to be formed by described first agitator at different levels and for making described dried object form stream opening from the toe lateral of the described housing opening that posteriorly effluent is logical, when the rear portion side of described housing be provided with temporarily block from toe lateral carried out dry process and meanwhile the baffle plate of dried object of movement, the mode being less than the area of the described stream opening at different levels of described toe lateral and rear portion side with the area of the described stream opening at different levels of the pars intermedia between the toe lateral of described housing and rear portion side forms described first agitator at different levels, when not arranging described baffle plate, the mode being less than the area of the described stream opening at different levels of described toe lateral with the area of the described stream opening at different levels of the pars intermedia of described housing and rear portion side forms described first agitator at different levels.

In the present invention, by configuration, there is described first aerofoil and described second aerofoil and be formed as the agitator of the wedge type of right angled triangle, the filling rate of dried object is made to be high fill-ratio and homogenising thus, in addition, by the pars intermedia or rear portion side that carry out the housing optionally easily reduced along with the progress of the drying process of dried object at the filling rate of dried object according to the presence or absence of baffle plate, the modes such as large agitator (agitator that central angle is large) are set, thus make the area of stream opening little, the translational speed of the pars intermedia of housing or the dried object of rear portion side can be postponed thus, the filling rate of dried object can more reliably and be effectively made to be high fill-ratio and homogenising.

In addition, by arranging large agitator at the pars intermedia of housing or rear portion side like this, the heat-conducting area of per unit volume becomes large thus, therefore, it is possible to improve the efficiency of the drying process of dried object.Thus, can also the miniaturization of implement device.

In addition, preferably in indirect heating type drying device of the present invention, the scraping plate for scraping dried object while rotating is provided integrally with at the rearward end 20d of described second agitator, described scraping plate possesses oppositely carries inclined plane, this oppositely conveying inclined plane tilt to the toe lateral of described housing gradually along with from the rearward end of described second agitator towards the direction of rotation rear of described rotating shaft, and with the inclined at inclination angles of intersecting with the first aerofoil of described second agitator, and more outstanding than the toe lateral of described first aerofoil also to described housing.

In the present invention, scraping plate possesses to tilt and the reverse conveying inclined plane also more outstanding to the toe lateral of housing than the first aerofoil towards the toe lateral of housing, therefore the wedge type of right angled triangle agitator rotate and from tapering leading section incision dried object and when being uniformly mixed, except the reverse conveying propulsive force of oppositely carrying except making it return toe lateral by the first aerofoil to dried object effect, dried object is applied the toe lateral returning housing further and the power of oppositely carrying because touching with the reverse conveying inclined plane of scraping plate, can obtain larger and effectively oppositely carry effect.Thus, more reliably and effectively make the filling rate of the dried object from the toe lateral in housing to rear portion side be high fill-ratio and homogenising.

And then, preferably in indirect heating type drying device of the present invention, be provided integrally with the scraping plate for scraping dried object while rotating in the rearward end of described second agitator, described second agitator of described housing rear portion side is provided with the scraping plate that the scraping area of the described scraping plate on described second agitator of housing toe lateral described in scraping area ratio is large.

Here, when such as dry sewage sludge etc., the dried object dropped into from input port posteriorly moves while carried out drying process in side from the toe lateral of housing on one side successively, dried object after the drying process of rear portion side thus becomes loose bulk material shape, and the stirring and mixing effect that the agitator of wedge type plays diminishes.

In contrast, in the present invention, owing to the agitator 20 of the rear portion side S3 at housing being equipped with the large scraping plate 25 of scraping area, therefore, under the scraping effect that this scraping plate plays, even if the dried object for loose bulk material shape, also can reliably and be effectively uniformly mixed.Thereby, it is possible to improve the efficiency of the drying process of dried object.

In addition, preferably in indirect heating type drying device of the present invention, possess: the torque detection means that the rotating torques of the rotating driving device that described rotating shaft is rotated is detected and/or the height level testing agency that the upper level of the dried object in described housing is detected; According to the controlling organization that the driving of testing result to described rotating driving device of described torque detection means and/or described height level testing agency controls.

In the present invention, due to the rotating torques step-down (uprising) of the rotating driving device that makes rotating shaft rotate when being less than (being greater than) setting when the filling rate of the dried object in housing, therefore torque detection means is utilized to detect the rotating torques of this rotating driving device, when rotating torques step-down (uprising), control rotating driving device by controlling organization and reduce (rising) to make rotating speed, the filling rate of dried object can be made thus to turn back to setting.Thereby, it is possible to make the filling rate of dried object be high fill-ratio and homogenising.

In addition, height level testing agency is utilized to detect the filling rate of upper level, the even dried object of dried object, when the filling rate (upper level) of the dried object in housing is lower than setting, control rotating driving device by controlling organization to reduce to make rotating speed, the filling rate of dried object can be made thus to turn back to setting.Thereby, it is possible to make the filling rate of dried object be high fill-ratio and homogenising.

And then, in indirect heating type drying device of the present invention, can possess: the torque detection means that the rotating torques of the rotating driving device that described rotating shaft is rotated is detected and/or the height level testing agency that the upper level of the dried object in described housing is detected; Be arranged through baffle plate lowering or hoisting gear in the rear portion side of described housing and can be elevated and the baffle plate of the height level that blocks can be regulated, this baffle plate according to described in the height level that blocks temporarily block from toe lateral and carried out dry process while the dried object of movement; The driving of testing result to described baffle plate lowering or hoisting gear according to described torque detection means and/or described height level testing agency controls, thus regulates the controlling organization of the height level that blocks of described baffle plate.

In the present invention, due to when the filling rate of the dried object in housing is lower than the rotating torques step-down of the rotating driving device making rotating shaft rotate during setting, therefore torque detection means is utilized to detect the rotating torques of this rotating driving device, when rotating torques step-down, control baffle plate lowering or hoisting gear by controlling organization to rise to make baffle plate, the filling rate of dried object can be made thus to turn back to setting.Thereby, it is possible to make the filling rate of dried object be high fill-ratio and homogenising.

In addition, height level testing agency is utilized to detect the filling rate of upper level, the even dried object of dried object, when the filling rate (upper level) of the dried object in housing is lower than setting, control baffle plate lowering or hoisting gear by controlling organization to rise to make baffle plate, the filling rate of dried object can be made thus to turn back to setting.Thereby, it is possible to make the filling rate of dried object be high fill-ratio and homogenising.

In addition, in indirect heating type drying device of the present invention, can possess: the torque detection means that the rotating torques of the rotating driving device that described rotating shaft is rotated is detected and/or the height level testing agency that the upper level of the dried object in described housing is detected; The housing lowering or hoisting gear that the mode be elevated with the toe lateral or rear portion side that enable described housing supports the toe lateral of described housing or rear portion side; The driving of testing result to described housing lowering or hoisting gear according to described torque detection means and/or described height level testing agency controls, thus regulates the controlling organization at the angle of inclination of described housing.

In the present invention, because the filling rate of the dried object in housing is lower than the rotating torques step-down of the rotating driving device making rotating shaft rotate during setting, therefore torque detection means is utilized to detect the rotating torques of this rotating driving device, when rotating torques step-down, control housing lowering or hoisting gear to reduce the angle of inclination of housing by controlling organization, the filling rate of dried object can be made thus to turn back to setting.Thereby, it is possible to make the filling rate of dried object be high fill-ratio and homogenising.

In addition, height level testing agency is utilized to detect the filling rate of upper level, the even dried object of dried object, when the filling rate (upper level) of the dried object in housing is lower than setting, control housing lowering or hoisting gear to reduce the angle of inclination of housing by controlling organization, the filling rate of dried object can be made thus to turn back to setting.Thereby, it is possible to make the filling rate of dried object be high fill-ratio and homogenising.

[invention effect]

In indirect heating type drying device of the present invention, by arranging the agitator of the wedge type of right angled triangle, thus compared with existing indirect heating type drying device, even if the angle of inclination of housing is identical, dried object also can be slack-off by the speed of withering movement simultaneously at the input port lateral row outlet side from housing, the filling rate of the dried object from the toe lateral in housing to rear portion side can be made high and homogenising.

Thus, according to indirect heating type drying device of the present invention, the thermal conductive surface in agitator, rotating shaft and housing can be avoided not contact with dried object and situation about significantly exposing, the generation of the wasted space in housing can be suppressed, can suppress from the useless heat radiation of the thermal conductive surface exposed, i.e. empty generation of burning, and efficiency, the thermal efficiency of dry process can be improved significantly.

In addition, owing to the filling rate of dry thing can be made high and homogenising, therefore without the need to possessing necessary above large heat-conducting area (heat-conducting area of housing and agitator) as existing indirect heating type drying device, can the miniaturization of implement device.

Accompanying drawing explanation

Fig. 1 is the figure representing the indirect heating type drying device that the first embodiment of the present invention relates to.

Fig. 2 is the X1-X1 alignment view of Fig. 1.

Fig. 3 (a) is the rotating shaft of indirect heating type drying device and the enlarged drawing of agitator that represent that the first embodiment of the present invention relates to, and (b) is the expanded view of (a).

Fig. 4 is the figure representing the indirect heating type drying device that the first embodiment of the present invention relates to, and is the figure representing the indirect heating type drying device possessing baffle plate.

Fig. 5 represents that the indirect heating type drying device utilizing the first embodiment of the present invention to relate to is to the figure of the withering state of dried object.

Fig. 6 (a) is the rotating shaft of indirect heating type drying device and the enlarged drawing of agitator that represent that the second embodiment of the present invention relates to, and (b) is the expanded view of (a).

Fig. 7 is the figure of the action effect representing the scraping plate that the agitator of the indirect heating type drying device that the second embodiment of the present invention relates to is arranged.

Fig. 8 is the figure representing the indirect heating type drying device that the 3rd embodiment of the present invention relates to.

Fig. 9 is the figure representing existing indirect heating type drying device.

Figure 10 is the X1-X1 alignment view along Fig. 9.

Figure 11 (a) represents the existing rotating shaft of indirect heating type drying device and the enlarged drawing of agitator, and (b) is the expanded view of (a).

Figure 12 represents to utilize existing indirect heating type drying device to the figure of the withering state of dried object.

Figure 13 represents to utilize existing indirect heating type drying device to the figure of the withering state of dried object.

[symbol description]

1 housing

2 outer covers

3 rotating driving devices

4 rotating shafts

5 agitators (the first agitator)

5a first aerofoil

5b second aerofoil

5c leading section

5d rearward end

6 input ports

7 outlets

10 stream openings

11 baffle plates

20 agitators (the second agitator)

20a first aerofoil

20b second aerofoil

20c leading section

20d rearward end

24 existing scraping plates

25 scraping plates

25a flat part

The reverse delivery section of 25b

25c oppositely carries inclined plane

26 torque detection means

27 height level testing agencies

28 baffle plate lowering or hoisting gears

29 housing lowering or hoisting gears

30 controlling organizations

The existing indirect heating type drying device of A

B indirect heating type drying device

C indirect heating type drying device

D indirect heating type drying device

F1 oppositely carries propulsive force

F2 carrying capacity

H setting

The axis of O1 rotating shaft

P dried object

P ' is by withering dried object (dry thing)

R height of baffle plate level

S1 toe lateral

S2 pars intermedia

S3 rear portion side

The fore-and-aft direction of T housing

The flow direction of W dried object

The central angle of θ 1 agitator

The angle of inclination of θ 2 housing and rotating shaft

N1 ~ n10 level

Detailed description of the invention

Below, referring to figs. 1 through Fig. 5, the indirect heating type drying device that the first embodiment of the present invention relates to is described.Here, present embodiment relates to the indirect heating type drying device processed for carrying out drying (minimizing moisture) to dried object such as various biological substance, sewage sludge, plant drainage mud, castoff/garbage, fecaluria mud, livestock waste, plant expressed juice residue the like waste.

The indirect heating type drying device B of present embodiment as shown in Figure 1 and Figure 2, same with existing indirect heating type drying device A, possesses housing 1, outer cover 2, rotating shaft 4 and multiple agitator 5, 20, its middle shell 1 has the container that cross section is the bottom of roughly U-shaped, outer cover 2 heated shell 1 (and then heating dried object P), rotating shaft 4 is from the toe lateral S1 (upstream side of the flow direction W of dried object P of the fore-and-aft direction T of housing 1, end side) run through and be set to rear portion side S3 (downstream, another side) inside, rotate around axes O 1 under the driving of the rotating driving devices such as engine 3, multiple agitator 5, inner circumferential end is connected to rotating shaft 4 by 20, radial direction to axes O 1 center of rotating shaft 4 is outstanding is also circumferentially formed as roughly fan-shaped.

In addition, housing 1 possesses input port 6 at toe lateral S1, and possesses outlet 7 at rear portion side S3, and the toe lateral S1 of housing 1 is configured in the position higher than rear portion side S3, and housing 1 tilts with the tilt angle theta 2 of regulation together with rotating shaft 4.In addition, in indirect heating type drying device B, be provided with 2 rotating shafts 4 rotated to direction opposite each other side by side in the inside of housing 1.In the same position in axes O 1 direction of each rotating shaft 4, circumference sky along axes O 1 center is equipped with 2 fan-shaped agitators 5,20 with opening specified gap (stream opening 10), a pair agitator 5,20 these being configured in the same position in axes O 1 direction is set to one-level, arranges multistage (n1, n2 with separating predetermined distance from toe lateral S1 to rear portion side S3 along axes O 1 direction ... n10) a pair agitator (5,5,20,20).Now, formed by (n1, n2n10) at different levels agitator 5,20 and make dried object P be set as stream opening 10 from the toe lateral S1 opening that posteriorly side S3 circulates of housing 1.In addition, rotating shaft 4 and agitator 5,20 are formed as hollow form, make to add hot fluid at internal circulation to heat the dried object P contacted.

On the other hand, in the indirect heating type drying device B of present embodiment, as Fig. 1 to Fig. 3 (Fig. 3 (a): the master observed from the radial outside of rotating shaft looks observation figure, Fig. 3 (b): the expanded view of rotating shaft and agitator) shown in, possesses the agitator 20 of wedge type, this agitator 20 has: towards the toe lateral S1 of housing 1, and along with the direction of rotation M front side from rotating shaft 4 leading section 20c towards direction of rotation M rear side rearward end 20d and gradually towards the first aerofoil 20a that the toe lateral S1 of housing 1 tilts; Towards the rear portion side S3 of housing 1, and the second aerofoil 20b orthogonal with the axes O 1 of rotating shaft 4.Namely, the agitator 20 of this wedge type is formed as along with from the direction of rotation M rear side of the rotating shaft 4 around axes O 1 central rotation is toward the front side, width dimensions diminishes gradually, is formed as with the right angled triangle on the leading section 20c in the direction of rotation M front of rotating shaft 4 summit that is acute angle.

In addition, in the present embodiment, as shown in Figure 1, when not arranging baffle plate 11, the agitator 20 of the wedge type of right angled triangle is disposed in pars intermedia S2 and the rear portion side S3 of housing 1.On the other hand, as shown in Figure 4, when the rear portion side S3 of housing 1 be provided with for temporarily blocking from toe lateral S1 carried out dry process and meanwhile movement dried object P baffle plate 11, the agitator 20 of the wedge type of right angled triangle is disposed in the pars intermedia S2 between the toe lateral S1 of housing 1 and rear portion side S3.It should be noted that, the agitator 5 beyond the agitator 20 of the wedge type of this right angled triangle can suitably select the agitator of the wedge type of existing straight type, apsacline, isosceles triangle to use.

Here, in the present embodiment, existing straight type is all have employed at all agitators, apsacline, the agitator of wedge type, when possessing baffle plate 11 and form indirect heating type drying device A (state shown in Figure 12), the region of the mid portion being less than the filling rate (the setting H of pre-set filling rate) of regulation is set to " pars intermedia S2 ", be set to than this " pars intermedia S2 " " toe lateral S1 " by the region of side, input port 6, be set to from " pars intermedia S2 " region to baffle plate 11 (when not possessing baffle plate 11 for from " pars intermedia S2 " region to outlet 7) " rear portion side S3 ".It should be noted that, can by the length of interval trisection of the fore-and-aft direction T till input port 6 to the outlet 7 from housing 1, simply the region of toe lateral is set to " toe lateral S1 ", the region of rear portion side is set to " rear portion side S3 ", the region of the mid portion between " toe lateral S1 " and " rear portion side S3 " is set to " pars intermedia S2 ".

And, in the indirect heating type drying device B of the present embodiment formed as described above, heat medium is circulated with heated shell 1 in outer cover 2, in addition, makes heat medium at the internal circulation of rotating shaft 4, agitator 5,20 to heat rotating shaft 4, agitator 5,20.In this condition, rotating driving device 3 driven and rotating shaft 4 is rotated, making in the inside of housing 1 multiple agitator 5,20 rotate, and dropping into the dried object P of saturation state to the inside of the toe lateral S1 of housing 1 from input port 6.That is, agitator 5,20 rotates and is cut in dried object P, is repeatedly uniformly mixed by this dried object P.In addition, because housing 1 tilts, therefore dried object P is by (n1 at different levels ... n10) the stream opening 10 between agitator 5,20 and while by heating on one side successively from toe lateral S1 posteriorly side S3 move.Like this, by from toe lateral S1 successively posteriorly side S3 move and be stirred the wing 5,20 and be uniformly mixed, dried object P is carried out drying process along with the downstream towards rear portion side S3, dried process is discharged to the dried object P (dry thing P ') of desired moisture content from outlet 7.

Here (with reference to Figure 12, Figure 13), when such as dry sewage sludge, the sewage sludge dropped into from input port 6 the upstream side moisture content of toe lateral S1 be about 80%, viscosity is large and be softening bar, in contrast, the moisture content moving to the sewage sludge as dried object P of the pars intermedia S2 of housing 1 from toe lateral S1 is about 50 ~ 65% and is large bulk.In addition, the moisture content further moving to the sewage sludge of rear portion side S3 is less than 40 ~ 50%, reduced viscosity becomes granular, and discharges from outlet 7.Now, when the downstream of rear portion side S3 has baffle plate 11, the dried object P ' crossing baffle plate 11 after temporarily being blocked by this baffle plate 11 successively discharges from outlet 7.

When agitators all as in the past is all agitator 5 of the wedge type being formed as isosceles triangle, as shown in figure 11, first aerofoil 5a and the inclination angle of the second aerofoil 5b are line symmetry (equal), therefore when agitator 5 stirs from leading section 5c incision dried object P, although the reverse conveying propulsive force F1 making dried object P return to side, input port 6 (returning to side) by the first aerofoil 5a effect and oppositely carry, but by the second aerofoil 5b effect the carrying capacity F2 that will carry to outlet 7 side (conveyor side) with oppositely carry propulsive force F1 to offset.Therefore, along with from the toe lateral S1 in housing 1 posteriorly side S3 move, the moisture of dried object P evaporates and the volume of dried object P reduces, and relative to toe lateral S1, pars intermedia S2 in housing 1 of the filling rate of dried object P or rear portion side S3 step-down, in addition, when having baffle plate 11, the filling rate of dried object P can at pars intermedia S2 step-down.

Relative to this, in the indirect heating type drying device B of present embodiment, the agitator 20 of the wedge type of the following right angled triangle formed is arranged from the pars intermedia S2 to rear portion side S3 of housing 1 when baffle plate 11 (have at pars intermedia S2), namely, first aerofoil 20a along with from leading section 20c towards rearward end 20d gradually anteriorly side S1 tilt, the second aerofoil 20b is orthogonal with the axes O 1 of rotating shaft 4.

And, as shown in Fig. 3 (b), when the agitator 20 of the wedge type of this right angled triangle rotates and to cut dried object P from tapering leading section 20c and to be uniformly mixed, although make dried object P return toe lateral S1 (side, input port 6, return to side) and the reverse conveying propulsive force F1 oppositely carried by the first aerofoil 20a effect, but due to the plane that the second aerofoil 20b is rectangular with axes O 1, therefore can not act on will by the dried object P posteriorly carrying capacity F2 that carries of side S3 (outlet 7 side, conveyor side).

Therefore, by arranging the agitator 20 of the wedge type of this right angled triangle at the pars intermedia S2 of housing 1 or rear portion side S3, thus as shown in Figure 5, dried object P exports 7 sides slowing by withering movement simultaneously in input port 6 lateral row from housing 1, and the filling rate of the dried object P from the toe lateral S1 in housing 1 to rear portion side S3 is meet the high fill-ratio of setting H and homogenising.

In addition, now, even if agitator 20 to be formed as the wedge type of right angled triangle, the tapering degree of leading section 20c is also maintained same degree with the tapering degree of the leading section of the agitator 5 of the wedge type of existing isosceles triangle.Therefore, the mixing effect of the incision effect to dried object P, dried object P can not be lost.

Thus, in the indirect heating type drying device B of present embodiment, tilt by possessing the first aerofoil 20a along with the toe lateral S1 from leading section 20c towards rearward end 20d gradually to housing 1, and the agitator 20 of the wedge type of the second aerofoil 20b right angled triangle orthogonal with the axes O 1 of rotating shaft 4, thus compared with existing indirect heating type drying device A, even if the tilt angle theta 2 of housing 1 is identical, dried object P export 7 sides from input port 6 lateral row of housing 1 also can be slack-off by the speed of withering movement simultaneously, the filling rate of the dried object P from the toe lateral S1 in housing 1 to rear portion side S3 can be made to be high fill-ratio and homogenising.

In addition, even if agitator 20 to be formed as the wedge type of right angled triangle, the tapering degree of leading section 20c is also maintained same degree with the tapering degree of the leading section of the agitator 5 of the wedge type of existing isosceles triangle, therefore the mixing effect of the incision effect to dried object P, dried object P can not be lost, the low dynamics same with the agitator 5 of the wedge type of existing isosceles triangle can be maintained, and the reverse conveying effect of dried object P can be obtained.

Thus, indirect heating type drying device B according to the present embodiment, there will not be agitator 5,20, thermal conductive surface in rotating shaft 4 and housing 1 do not contact with dried object P and situation about significantly exposing, the generation of the wasted space in housing 1 can be suppressed, can suppress from the useless heat radiation of the thermal conductive surface exposed, i.e. empty generation of burning, and significantly can improve efficiency, the thermal efficiency of dry process.

And then, owing to the filling rate of dried object P can be made high and homogenising, therefore without the need to possessing necessary above large heat-conducting area (heat-conducting area of housing 1 and agitator 5,20) as existing indirect heating type drying device A, can the miniaturization of implement device B.

Further, due to like this can the miniaturization of implement device B, therefore, it is possible to reduce the prime cost of fee of material/installation cost etc.In addition, by the miniaturization of implement device B, area of dissipation diminishes thus, thus can reduce thermal losses (heat loss), improves the thermal efficiency and cut down consume energy (operating cost) and maintain administration fee.Thereby, it is possible to cut down life-span of goods cost.

In addition, in the indirect heating type drying device B of present embodiment, when the rear portion side S3 of housing 1 be provided with temporarily block from toe lateral S1 carried out dry process and meanwhile movement dried object P baffle plate 11, the agitator 20 of the wedge type of right angled triangle is disposed in the pars intermedia S2 of housing 1, when not arranging baffle plate 11, the agitator 20 of the wedge type of right angled triangle is disposed in pars intermedia S2 and the rear portion side S3 of housing 1, like this, the pars intermedia S2 of the housing 1 optionally easily reduced along with the carrying out of the drying process of dried object P at the filling rate of dried object P according to the presence or absence of baffle plate 11 or rear portion side S3 configuration are formed as the agitator 20 of the wedge type of right angled triangle, the filling rate of dried object P can reliably and be effectively made to be high fill-ratio and homogenising thus.

Above, the first embodiment of the indirect heating type drying device that the present invention relates to is illustrated, but the present invention is not limited to above-mentioned first embodiment, suitably can changes in the scope not departing from its purport.

Such as, when the rear portion side S3 of housing is provided with baffle plate 11, agitator 5,20 at different levels can be formed in the mode that the stream opening 10 at different levels of the pars intermedia S2 between the toe lateral S1 of housing 1 and rear portion side S3 is less than the area of the stream opening 10 at different levels of toe lateral S1 and rear portion side S3, when not arranging baffle plate 11, agitator 5,20 at different levels can be formed in the mode that the stream opening 10 at different levels of the pars intermedia S2 of housing 1 and rear portion side S3 is less than the area of the stream opening 10 described at different levels of toe lateral S1.That is, the stream opening 10 at different levels of the pars intermedia S2 as the filling rate of dried object P easily reduces by inferior mode or rear portion side S3 such as can be adopted at present to be formed little: to be that the agitator 5,20 of the pars intermedia S2 of about 135 ° or the roughly fan-shaped of rear portion side S3 is formed as the large agitator 5,20 that central angle θ 1 is about 150 ° by central angle θ 1; The pars intermedia S2 or the rear portion side S3 that carry out the housing 1 optionally easily reduced along with the carrying out of the drying process of dried object P at the filling rate of dried object P according to the presence or absence of baffle plate 11 arrange large agitator 5,20.

And, in this case, by arranging the agitator 20 being formed as the wedge type of right angled triangle, the filling rate of dried object P can be made thus to be high fill-ratio and homogenising, in addition by making stream opening 10 area of the pars intermedia S2 of housing 1 or the at different levels of rear portion side S3 little, the translational speed of the dried object P of pars intermedia S2 or rear portion side S3 can be delayed thus further, can more effectively and reliably make the filling rate of dried object P be high fill-ratio and homogenising.

In addition, arrange large agitator 5,20 by the pars intermedia S2 at housing 1 like this or rear portion side S3, the heat-conducting area of per unit volume becomes large thus, therefore, it is possible to improve the efficiency of the drying process of dried object P.Therefore, can also the miniaturization of implement device B.

Next, with reference to Fig. 6, Fig. 7 (and Fig. 1 to Fig. 5), the indirect heating type drying device that the second embodiment of the present invention relates to is described.Present embodiment is same with the first embodiment to be related to for the withering indirect heating type drying device of dried object to various biological substance, sewage sludge, plant drainage mud, castoff/garbage, fecaluria mud, livestock waste, plant expressed juice residue the like waste etc.Thus, mark same symbol to the structure same with the first embodiment, description is omitted.

The indirect heating type drying device C of present embodiment is as shown in Fig. 1 (Fig. 2, Fig. 4, Fig. 5), and same with the first embodiment possess housing 1, outer cover 2, rotating shaft 4, multiple agitator 5,20 and forming.

In addition, possesses the agitator 20 of the wedge type of right angled triangle, this agitator 20 has: towards the toe lateral S1 of housing 1, and along with the direction of rotation M front side from rotating shaft 4 leading section 20c towards direction of rotation M rear side rearward end 20d and gradually to the first aerofoil 20a that the toe lateral S1 of housing 1 tilts; Towards the rear portion side S3 of housing 1, and the second aerofoil 20b orthogonal with the axes O 1 of rotating shaft 4.

And then the agitator 20 of the wedge type of this right angled triangle is same with the first embodiment, be optionally disposed in pars intermedia S2, the rear portion side S3 of housing 1 according to the presence or absence of baffle plate 11.

On the other hand, as Fig. 6 (Fig. 6 (a): observe from the radial outside of rotating shaft and the front view that obtains, Fig. 6 (b): the expanded view of rotating shaft and agitator) shown in, in the present embodiment, scraping plate (scraping blade) 25 is provided with integratedly at the rearward end 20d (end of the direction of rotation M rear side of rotating shaft 4) of agitator 20, this scraping plate 25 is for the dried object P in scraping housing 1 while the rotation of agitator 20, thus raising is uniformly mixed efficiency, even drying efficiency.In addition, this scraping plate 25 such as possesses the flat part 25a with the area larger than the rear end face of agitator 20 and is formed, and the one side of flat part 25a is installed with the rear end plane-plane contact of agitator 20.

And then this scraping plate 25 possesses the direction of rotation M rear side that has from a side end of the first aerofoil 20a side of flat part 25a towards rotating shaft 4 and forwards rolls the reverse delivery section 25b of the tabular of oblique reverse conveying inclined plane 25c gradually and formed.In addition, this reverse delivery section 25b is formed as oppositely carrying inclined plane 25c forwards than the first aerofoil 20a of agitator 20 and the intersection point of rear end face to give prominence to and have the angle of inclination intersected with the first aerofoil 20a in side.Namely, the scraping plate 25 of present embodiment possesses following reverse conveying inclined plane 25c and is formed, this oppositely conveying inclined plane 25c to tilt and with the inclined at inclination angles of intersecting with the first aerofoil 20a of agitator 20 along with the toe lateral S1 from the rearward end 20d of agitator 20 towards the direction of rotation M rear of rotating shaft 4 gradually to housing 1, thus more outstanding than the first toe lateral S1 of aerofoil 20a also to housing 1.

And, in the indirect heating type drying device C of the present embodiment so formed, agitator 5,20 is cut dried object P from its tapering leading section 5c, 20c along with rotation and is also repeatedly uniformly mixed, in addition, carry out scraping dried object P repeatedly by the scraping plate 25 being arranged on the rearward end 20d of agitator 20, thus be effectively uniformly mixed.

In addition, now, as shown in Fig. 6 (b), tilt and the reverse conveying inclined plane 25c also more outstanding to the toe lateral S1 of housing 1 than the first aerofoil 20a towards the toe lateral S1 of housing 1 because scraping plate 25 possesses, therefore when the agitator 20 of the wedge type of right angled triangle rotates and to cut dried object P from tapering leading section 20c and to be uniformly mixed, except the reverse conveying propulsive force F1 oppositely carried except making it return toe lateral S1 by the first aerofoil 20a to dried object P effect, dried object P is applied the toe lateral S1 returning housing 1 further and the power F1 oppositely carried because touching with the reverse conveying inclined plane 25c of scraping plate 25.

Here, as shown in Fig. 7 (a), when the existing rearward end 5d being formed as the agitator 5 of the wedge type of isosceles triangle arrange existing do not possess the flat scraping plate 24 of reverse delivery section 25b, by agitator 5 being formed as the wedge type of isosceles triangle, the reverse conveying propulsive force F1 of dried object P offsets with the carrying capacity F2 of the dried object P transported by the second aerofoil 5b of the inclination of adjacent agitator 5 thus, thus oppositely conveying propulsive force F1 can not be produced by agitating plate 5, the effect of oppositely being carried by dried object P cannot be obtained.

In addition, as shown in Fig. 7 (b), when the rearward end 20d of the agitator 20 being formed as the wedge type of right angled triangle that the present invention relates to is provided with existing flat scraping plate 24, can not be produced by scraping plate 24 and make dried object P return toe lateral S1 and the reverse conveying propulsive force F1 that oppositely carries.Therefore, in the structure shown here, as shown in the first embodiment, the first being played by the dried object P reverse conveying propulsive force F1 that anteriorly side S1 oppositely carries of aerofoil 20a generation by means of only the agitator 20 of the wedge type by right angled triangle oppositely carries effect.

On the other hand, as shown in Fig. 7 (c), when the existing rearward end 5d being formed as the agitator 5 of the wedge type of isosceles triangle arrange present embodiment possess the scraping plate 25 of reverse delivery section 25b, by the reverse conveying inclined plane 25c effect of reverse delivery section 25b by the dried object P anteriorly reverse conveying propulsive force F1 that oppositely carries of side S1.But the reverse conveying propulsive force F1 of the dried object P that the reverse delivery section 25b of this scraping plate 25 the acts on carrying capacity F2 of dried object P that is little or that transported by the second aerofoil 5b of the inclination by adjacent agitator 5 offsets.Therefore, in the structure shown here, still the effect of oppositely being carried by dried object P cannot be obtained fully.

Relative to this, as shown in Fig. 7 (d), when agitator 20 is formed as the wedge type of right angled triangle, due to carrying capacity F2 can not be produced by the second aerofoil 20b, the reverse conveying propulsive force F1 of the dried object P therefore oppositely carried by the reverse delivery section 25b of scraping plate 25 can not be cancelled, act on complementing each other with the reverse conveying effect played by possessing reverse delivery section 25b and forming scraping plate 25 by agitator 20 being formed as the wedge type of right angled triangle and the reverse conveying effect that plays, thus large reverse conveying propulsive force F1 is acted on to dried object P.Thereby, it is possible to more reliably and effectively make the filling rate of dried object P high and homogenising.

Thus, indirect heating type drying device C according to the present embodiment, the action effect of the first embodiment can be obtained, and tilt and the reverse conveying inclined plane 25c also more outstanding to the toe lateral S1 of housing 1 than the first aerofoil 20a towards the toe lateral S1 of housing 1 because scraping plate 25 possesses, therefore when the agitator 20 of the wedge type of right angled triangle rotates and to cut dried object P from tapering leading section 20c and to be uniformly mixed, except the reverse conveying propulsive force F1 oppositely carried except making it return toe lateral S1 by the first aerofoil 20a to dried object P effect, dried object P can be applied the toe lateral S1 returning housing 1 further and the power of oppositely carrying because touching with the reverse conveying inclined plane 25c of scraping plate 25, thus can obtain larger and effectively oppositely carry effect.Thus, more reliably and effectively make the filling rate of the dried object P from the toe lateral S1 in housing 1 to rear portion side S3 be high fill-ratio and homogenising.

Thus, indirect heating type drying device C according to the present embodiment, can avoid more reliably agitator 5,20, thermal conductive surface in rotating shaft 4 and housing 1 do not contact with dried object P and situation about significantly exposing, the generation of the wasted space in housing 1 can be suppressed, and can suppress from the useless heat radiation of the thermal conductive surface exposed, i.e. empty generation of burning.

Above, second embodiment of the indirect heating type drying device that the present invention relates to is illustrated, but the present invention is not limited to the second above-mentioned embodiment, comprises the structure of the first embodiment, modification, suitably can change in the scope not departing from purport.

Such as, in the indirect heating type drying device C of present embodiment, can be configured to, the position that filling rate at dried object P same with the first embodiment can reduce is suitable for the agitator 20 of the wedge type of right angled triangle and then is suitable for the agitator 20 possessing the scraping plate 25 with reverse delivery section 25b, and other parts are suitable for existing agitator 5.

Here, in the situations such as such as dry sewage sludge, the dried object P dropped into from input port 6 on one side successively from the toe lateral S1 of housing 1 posteriorly side S3 move while carried out drying and process, thus rear portion side S3 drying process progress after dried object P ' (P) become loose bulk material shape, the stirring and mixing effect that the agitator 5,20 of wedge type plays diminishes.In contrast, the large scraping plate 25 of the scraping area of the scraping plate 25 of the agitator 5 of the toe lateral S1 of scraping area ratio housing can be arranged at the agitator 5,20 of the rear portion side S3 of housing 1.Like this, when the rear portion side S3 of housing 1 is equipped with the large scraping plate 25 of scraping area, under the scraping effect that this scraping plate 25 plays, even if the dried object P ' for loose bulk material shape, also can reliably and be effectively uniformly mixed.Thereby, it is possible to improve the efficiency of the drying process of dried object P.

Next, with reference to Fig. 8 (and Fig. 1 to Fig. 5), the indirect heating type drying device that the 3rd embodiment of the present invention relates to is described.Present embodiment is same with first, second embodiment, relates to for the withering indirect heating type drying device of dried object to various biological substance, sewage sludge, plant drainage mud, castoff/garbage, fecaluria mud, livestock waste, plant expressed juice residue the like waste etc.Thus, same symbol is marked to the structure same with first, second embodiment, omit detailed description.

The indirect heating type drying device D of present embodiment is same with first, second embodiment, possesses housing 1, outer cover 2, rotating shaft 4, multiple agitator 5,20 and forming as shown in Figure 8.In addition, agitator 20 be the agitator 5,20 (or with second embodiment same agitator 5,20 of being provided with scraping plate 25) same with the first embodiment at least partially, and be formed as the wedge type of right angled triangle.

On the other hand, in the indirect heating type drying device D of present embodiment, first, the torque detection means 26 that the rotating torques of rotating driving device 3 driving rotating shaft 4 (and agitator 5,20) to rotate is detected and/or the height level testing agency 27 that the upper level of the dried object P in housing 1, even filling rate are detected is possessed.In addition, height level testing agency 27 is provided with multiple between the toe lateral S1 to rear portion side S3 of housing 1, can detect the upper level (filling rate) of the dried object P at multiple position such as toe lateral S1, pars intermedia S2, rear portion side S3.

In addition, baffle plate 11 can be set at the rear portion side S3 of housing 1, and this baffle plate 11 is arranged to be elevated along the vertical direction by the driving of baffle plate lowering or hoisting gear 28 and can be regulated the height level R that blocks.That is, can be configured to, be carried out dry process while the dried object P of movement correspondingly temporarily can be blocked with the height level R that blocks of baffle plate 1 from the toe lateral S1 of housing 1, freely can change this height level R that blocks.

And then the housing lowering or hoisting gears 29 such as can to arrange the toe lateral S1 of housing 1 or rear portion side S3 supporting be the ground jack that can be elevated, can the tilt angle theta 2 of adjustment housings 1 by the driving of this housing lowering or hoisting gear 29.

Further, in the indirect heating type drying device D of present embodiment, the controlling organization 30 controlling the driving of rotating driving device 3 according to the testing result of torque detection means 26 and/or height level testing agency 27 is possessed.

In addition, when arranging can be elevated along the vertical direction by baffle plate lowering or hoisting gear 28 baffle plate 11, controlling organization 30 controls the driving of baffle plate lowering or hoisting gear 28 according to the testing result of torque detection means 26 and/or height level testing agency 27, and the height level R that blocks of controllable register 11.

And then, when being configured to be come tilt angle theta 2 of adjustment housings 1 by housing lowering or hoisting gear 29, controlling organization 30 controls the driving of housing lowering or hoisting gear 29 according to the testing result of torque detection means 26 and/or height level testing agency 27, and the tilt angle theta 2 of adjustment housings 1.

And, in the indirect heating type drying device D of the present embodiment be made up of said structure, due to when the filling rate of the dried object P in housing 1 is lower than the rotating torques step-down of the rotating driving device 3 making rotating shaft 4 rotate during setting H, therefore torque detection means 26 is utilized to detect the rotating torques of this rotating driving device 3, when rotating torques reduces, control rotating driving device 3 to reduce rotating speed by controlling organization 30.Thereby, it is possible to make the filling rate of dried object P turn back to setting H, the filling rate of dried object P can be made to be high fill-ratio and homogenising.

In addition, height level testing agency 27 is utilized to detect the filling rate of upper level, even the dried object P of dried object P, when the filling rate (upper level) of the dried object P in housing 1 is lower than setting H, control rotating driving device 3 to reduce rotating speed by controlling organization 30, the filling rate of dried object P can be made thus to turn back to setting H.Thereby, it is possible to make the filling rate of dried object P be high fill-ratio and homogenising.

In addition, when being provided with can be elevated along the vertical direction by baffle plate lowering or hoisting gear 28 baffle plate 11, the rotating torques step-down of the rotating driving device 3 rotated owing to making rotating shaft 4 when the filling rate of the dried object P in housing 1 is less than setting H, therefore torque detection means 26 is utilized to detect the rotating torques of this rotating driving device 3, when rotating torques step-down, control baffle plate lowering or hoisting gear 28 by controlling organization 30 and rise to make baffle plate 11.Thereby, it is possible to make the filling rate of dried object P turn back to setting H, the filling rate of dried object P can be made to be high fill-ratio and homogenising.

In addition, height level testing agency 27 is utilized to detect the filling rate of upper level, even the dried object P of dried object P, when the filling rate of the dried object P in housing 1 is lower than setting H, control baffle plate lowering or hoisting gear 28 by controlling organization 30 to rise to make baffle plate 11, the filling rate of dried object P can be made thus to turn back to setting H.Thereby, it is possible to make the filling rate of dried object P be high fill-ratio and homogenising.

And then, when being configured to be come tilt angle theta 2 of adjustment housings 1 by housing lowering or hoisting gear 29, the rotating torques step-down of the rotating driving device 3 rotated owing to making rotating shaft 4 when the filling rate of the dried object P in housing 1 is less than setting H, therefore torque detection means 26 is utilized to detect the rotating torques of this rotating driving device 3, when rotating torques step-down, control housing lowering or hoisting gear 29 to reduce the tilt angle theta 2 of housing 1 by controlling organization 30.Thereby, it is possible to make the filling rate of dried object P turn back to setting H, the filling rate of dried object P can be made to be high fill-ratio and homogenising.

In addition, height level testing agency 27 is utilized to detect the filling rate of upper level, even the dried object P of dried object P, when the filling rate of the dried object P in housing 1 is lower than setting H, control housing lowering or hoisting gear 29 to reduce the tilt angle theta 2 of housing 1 by controlling organization 30, the filling rate of dried object P can be made thus to turn back to setting H.Thereby, it is possible to make the filling rate of dried object P be high fill-ratio and homogenising.

Thus, in the indirect heating type drying device D of present embodiment, also the action effect of first, second embodiment can be obtained, and can also reliably avoid agitator 5,20, thermal conductive surface in rotating shaft 4 and housing 1 do not contact with dried object P and situation about significantly exposing, the generation of the wasted space in housing 1 can be suppressed, and can suppress from the useless heat radiation of the thermal conductive surface exposed, i.e. empty generation of burning.

Above, 3rd embodiment of the indirect heating type drying device that the present invention relates to is described, but the present invention is not limited to the 3rd above-mentioned embodiment, can comprise the structure of first, second embodiment, modification, suitably change in the scope not departing from purport.

Claims (8)

1. an indirect heating type drying device, it possesses:

Housing, it is formed with the input port of dropping into dried object in toe lateral, be formed with the outlet of the dried object after discharging dried process in rear portion side, the mode that this housing is configured in the position higher than rear portion side with toe lateral is obliquely installed;

Rotating shaft, it runs through the inside being set to rear portion side from the toe lateral of described housing, and axis direction is towards the fore-and-aft direction of described housing, and described rotating shaft can rotate about the axis;

Multiple first agitator, it is also circumferentially formed as roughly fan-shaped from the outer peripheral face of described rotating shaft to radial outside is outstanding, and described multiple first agitator arranges multistage along the axis direction sky of described rotating shaft with opening predetermined distance,

Described indirect heating type drying device carries out drying process by making heat medium carry out the dried object in housing described in indirect at the internal circulation of described rotating shaft and described first agitator, it is characterized in that,

Possesses the second agitator of wedge type, this second agitator has: the first aerofoil, it is towards the toe lateral of described housing, and along with the direction of rotation front side from described rotating shaft leading section towards direction of rotation rear side rearward end and tilt to the toe lateral of described housing gradually; Second aerofoil, it is towards the rear portion side of described housing, and with the axis vertical take-off of described rotating shaft,

Described second agitator is configured in pars intermedia or the rear portion side of described housing.

2. indirect heating type drying device according to claim 1, is characterized in that,

When the rear portion side of described housing be provided with temporarily block from toe lateral carried out dry process and meanwhile the baffle plate of dried object of movement, second agitator with the wedge type of described first aerofoil and described second aerofoil is disposed in the pars intermedia between the toe lateral of described housing and rear portion side

When not arranging described baffle plate, second agitator with the wedge type of described first aerofoil and described second aerofoil is disposed in pars intermedia and the rear portion side of described housing.

3. indirect heating type drying device according to claim 1, is characterized in that,

To be formed by described first agitator at different levels and for making described dried object form stream opening from the toe lateral of the described housing opening that posteriorly effluent is logical,

When the rear portion side of described housing be provided with temporarily block from toe lateral carried out dry process and meanwhile the baffle plate of dried object of movement, the mode being less than the area of the described stream opening at different levels of described toe lateral and rear portion side with the area of the described stream opening at different levels of the pars intermedia between the toe lateral of described housing and rear portion side forms described first agitator at different levels

When not arranging described baffle plate, the mode being less than the area of the described stream opening at different levels of described toe lateral with the area of the described stream opening at different levels of the pars intermedia of described housing and rear portion side forms described first agitator at different levels.

4. indirect heating type drying device according to claim 1, is characterized in that,

The scraping plate for scraping dried object while rotating is provided integrally with in the rearward end of described second agitator,

Described scraping plate possesses oppositely carries inclined plane, this oppositely conveying inclined plane tilt to the toe lateral of described housing gradually along with from the rearward end of described second agitator towards the direction of rotation rear of described rotating shaft, and with the inclined at inclination angles of intersecting with the first aerofoil of described second agitator, and more outstanding than the toe lateral of described first aerofoil also to described housing.

5. indirect heating type drying device according to claim 1, is characterized in that,

The scraping plate for scraping dried object while rotating is provided integrally with in the rearward end of described second agitator,

Described second agitator of described housing rear portion side is provided with the scraping plate that the scraping area of the described scraping plate on described second agitator of housing toe lateral described in scraping area ratio is large.

6. indirect heating type drying device according to claim 1, is characterized in that,

Possess:

The torque detection means that the rotating torques of the rotating driving device that described rotating shaft is rotated is detected and/or the height level testing agency that the upper level of the dried object in described housing is detected;

According to the controlling organization that the driving of testing result to described rotating driving device of described torque detection means and/or described height level testing agency controls.

7. indirect heating type drying device according to claim 1, is characterized in that,

Possess:

The torque detection means that the rotating torques of the rotating driving device that described rotating shaft is rotated is detected and/or the height level testing agency that the upper level of the dried object in described housing is detected;

Be arranged through baffle plate lowering or hoisting gear in the rear portion side of described housing and can be elevated and the baffle plate of the height level that blocks can be regulated, this baffle plate according to described in the height level that blocks temporarily block from toe lateral and carried out dry process while the dried object of movement;

The driving of testing result to described baffle plate lowering or hoisting gear according to described torque detection means and/or described height level testing agency controls, thus regulates the controlling organization of the height level that blocks of described baffle plate.

8. indirect heating type drying device according to claim 1, is characterized in that,

Possess:

The torque detection means that the rotating torques of the rotating driving device that described rotating shaft is rotated is detected and/or the height level testing agency that the upper level of the dried object in described housing is detected;

The housing lowering or hoisting gear that the mode be elevated with the toe lateral or rear portion side that enable described housing supports the toe lateral of described housing or rear portion side;

The driving of testing result to described housing lowering or hoisting gear according to described torque detection means and/or described height level testing agency controls, thus regulates the controlling organization at the angle of inclination of described housing.