CN105066626A - Tail heat utilization screen hole plate turnover type dryer - Google Patents
Tail heat utilization screen hole plate turnover type dryer Download PDFInfo
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- CN105066626A CN105066626A CN201510497118.4A CN201510497118A CN105066626A CN 105066626 A CN105066626 A CN 105066626A CN 201510497118 A CN201510497118 A CN 201510497118A CN 105066626 A CN105066626 A CN 105066626A
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- 230000007306 turnover Effects 0.000 title claims 7
- 238000001035 drying Methods 0.000 claims abstract description 45
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000000428 dust Substances 0.000 abstract description 16
- 239000000463 material Substances 0.000 abstract description 16
- 238000004140 cleaning Methods 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000009825 accumulation Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 12
- 238000005192 partition Methods 0.000 description 9
- 230000003068 static effect Effects 0.000 description 7
- 239000002918 waste heat Substances 0.000 description 5
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000007791 dehumidification Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007602 hot air drying Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
本发明公开了一种尾热利用筛孔翻板式干燥机，干燥机箱体设有自上而下的筛孔翻板式输送；干燥机箱体分为上、中、下三个干燥区；上干燥区经空气换热器连接引风机后排空，空气换热器的新鲜空气出口连接鼓风机进风口，鼓风机出风口连接中干燥区内的蒸汽翅片加热器；所述引风机叶轮具有叶片为中空楔形的结构；引风机外形轮廓线是渐开线。本发明尾热利用简洁合理，经过热回收的湿热尾气通过引风机排出，对完成干燥的物料进行有效冷却和进一步尾热利用，促进节能减排；叶片为中空楔形的结构实现了灰尘的实时清理并增大了风机的叶轮强度，增强了稳定性并有效杜绝灰尘积累引发的安全事故，应用前景广阔。
The invention discloses a sieve hole flap type dryer for tail heat utilization. The dryer box is provided with a top-down sieve hole flap type conveyance; the dryer box is divided into upper, middle and lower drying areas; the upper drying area After the air heat exchanger is connected to the induced draft fan, the fresh air outlet of the air heat exchanger is connected to the air inlet of the blower, and the air outlet of the blower is connected to the steam fin heater in the drying area; the impeller of the induced draft fan has a hollow wedge-shaped blade The structure; the outline of the induced draft fan is an involute. The tail heat utilization of the present invention is simple and reasonable, and the hot and humid tail gas after heat recovery is discharged through the induced draft fan, which effectively cools the dried materials and further utilizes the tail heat to promote energy saving and emission reduction; the blade is a hollow wedge-shaped structure to realize the real-time cleaning of dust And the strength of the impeller of the fan is increased, the stability is enhanced and safety accidents caused by dust accumulation are effectively prevented, and the application prospect is broad.
Description
技术领域 technical field
本发明涉及一种干燥机，具体指引风机不会积尘的尾热利用筛孔翻板式干燥机。 The invention relates to a drying machine, in particular to a sieve-hole flap-type drying machine in which tail heat from a fan does not accumulate dust.
背景技术 Background technique
热风干燥机由于技术成熟、适应能力强、运行费用低、可靠性强，成为物料干燥的首选设备之一。筛孔翻板式干燥机是热风干燥机的一种，具有结构简单、加工能力特别强的特点，并且在运行过程中由于物料逐层落料翻转，因而干燥的产品质量特别均匀可靠。筛孔翻板式干燥机在干燥过程中需要不断排放湿热尾气来促进干燥进程，由于排放尾气中富含大量尾热，所以需要对尾气进行尾热利用操作，因而进行优化的尾热利用设计具有重要意义。 Due to its mature technology, strong adaptability, low operating cost and high reliability, hot air dryer has become one of the first choice equipment for material drying. The sieve flap dryer is a kind of hot air dryer, which has the characteristics of simple structure and strong processing capacity, and the quality of the dried product is particularly uniform and reliable because the material is turned over layer by layer during operation. During the drying process, the sieve flap dryer needs to continuously discharge hot and humid tail gas to promote the drying process. Since the exhaust gas is rich in a large amount of tail heat, it is necessary to perform tail heat utilization operations on the tail gas. Therefore, it is important to optimize the design of tail heat utilization. significance.
引风机是筛孔翻板式干燥机排湿的关键设备，引风机一般为离心风机，引风机的连续、稳定、可靠工作对干燥机排湿十分关键，由于干燥机使用的场合大多都含有一定的粉尘，引风机工作时，气流通过高速旋转的风机叶轮时由于离心分离作用，灰尘颗粒会脱离气流相而沉积附着在风机叶轮上。 The induced draft fan is the key equipment for dehumidification of the sieve flap dryer. The induced draft fan is generally a centrifugal fan. The continuous, stable and reliable operation of the induced draft fan is very important for the dehumidification of the dryer. Because most of the occasions where the dryer is used contain certain Dust, when the induced draft fan is working, when the air flow passes through the high-speed rotating fan impeller, due to the centrifugal separation, the dust particles will separate from the air flow phase and deposit on the fan impeller.
由于引风机叶轮转速一般都较高，只要气流中有微量灰尘存在，长时间工作后都会积累较多灰尘，从而改变引风机叶轮旋转的平衡，如果引风机叶轮对灰尘没有自净作用也没有及时清理，就会越积越多并逐步改变引风机叶轮的静态和动态平衡，从而产生振动。一旦遇到有部分板结的灰尘被振动脱落，就会立即远离引风机的动态旋转平衡，继而产生强烈振动，这可能会引发严重的人员和设备安全事故。 Since the impeller speed of the induced draft fan is generally high, as long as there is a small amount of dust in the airflow, more dust will accumulate after a long time of work, thereby changing the balance of the impeller rotation of the induced draft fan. , it will accumulate more and gradually change the static and dynamic balance of the induced draft fan impeller, resulting in vibration. Once the partly hardened dust is shaken off, it will immediately leave the dynamic rotation balance of the induced draft fan, and then generate strong vibration, which may cause serious personnel and equipment safety accidents.
因此，如果能设计一种离心式引风机叶轮，使其能进行自动清理就不用担心造成灰尘积累，对于保持引风机的稳定可靠工作和杜绝安全事故都具有特别重要的意义。 Therefore, if a centrifugal induced draft fan impeller can be designed so that it can be cleaned automatically, there is no need to worry about dust accumulation, which is of great significance for maintaining the stable and reliable operation of the induced draft fan and preventing safety accidents.
发明内容 Contents of the invention
本发明要解决的技术问题就是克服现有技术的不足，提供一种结构简单实用，能自动清理引风机叶轮上灰尘的尾热利用筛孔翻板式干燥机。 The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a simple and practical structure, which can automatically clean the tail heat of the dust on the impeller of the induced draft fan and utilize the sieve hole flap type dryer.
为克服现有技术的不足，本发明采取以下技术方案： In order to overcome the deficiencies in the prior art, the present invention takes the following technical solutions:
一种尾热利用筛孔翻板式干燥机，包括干燥机箱体和引风机，其特征在于；干燥机箱体设有主动轮、被动轮和不锈钢筛板组成自上而下的筛孔翻板式输送；干燥机箱体内有中隔板和下隔板将干燥机箱体分为上、中、下三个干燥区；上干燥区经空气换热器连接引风机后排空，空气换热器进气端连通大气，出气端经风管连接鼓风机进风口，鼓风机出风口连接中干燥区内的蒸汽翅片加热器；所述引风机包括风机叶轮和机壳，风机叶轮包括叶轮背板、叶轮面板和叶片，叶片布置成叶轮轴径向、中心对称的中空楔形；中空楔形叶片连接叶轮面板并与叶轮背板焊接组成叶轮主体；叶轮面板设有进风口、叶轮背板通过铆钉固定并连接轴座，轴座通过轴孔与风机轴进行配合连接；机壳设有进风口和出风口，机壳外形轮廓线是渐开线，渐开线圆圆心与风机轴心重合，渐开线从机壳出风口内侧开始，划线半径随渐开线圆逐渐加大，到机壳出风口外侧结束，机壳出风口宽度等于渐开线圆周长；机壳进风口设有盖板，盖板上也有进风口便于连接管道，且轴心和叶轮轴心重合。 A sieve hole flap type dryer for tail heat utilization, including a dryer box and an induced draft fan, characterized in that the dryer box is equipped with a driving wheel, a passive wheel and a stainless steel sieve plate to form a top-down sieve hole flap type conveying; There is a middle partition and a lower partition in the dryer cabinet to divide the dryer cabinet into upper, middle and lower drying areas; the upper drying area is evacuated after being connected to the induced draft fan through the air heat exchanger, and the air inlet end of the air heat exchanger is connected. Atmosphere, the air outlet end is connected to the air inlet of the blower through the air pipe, and the air outlet of the blower is connected to the steam fin heater in the drying area; the induced draft fan includes the fan impeller and the casing, and the fan impeller includes the impeller back plate, impeller panel and blades, The blades are arranged in a hollow wedge shape that is radial to the impeller shaft and symmetrical to the center; the hollow wedge blades are connected to the impeller panel and welded with the impeller back plate to form the main body of the impeller; the impeller panel is provided with an air inlet, and the impeller back plate is fixed by rivets and connected to the shaft seat Cooperate with the fan shaft through the shaft hole; the casing is equipped with an air inlet and an air outlet. At the beginning, the radius of the marking line gradually increases with the involute circle, and ends at the outer side of the air outlet of the casing. The width of the air outlet of the casing is equal to the circumference of the involute line; Connect the pipe, and the axis coincides with the axis of the impeller.
所述下干燥区经风管连回鼓风机，进一步实现尾热利用。 The lower drying area is connected back to the blower through the air pipe to further realize the utilization of tail heat.
所述干燥机箱体设有进料斗和出料斗，实现连续化的进料干燥。 The box body of the dryer is provided with a feed hopper and a discharge hopper to realize continuous feed drying.
所述机壳固定在机座上。机壳起到封闭作用，进风口进气通过叶轮旋转获得动能，并在机壳内进行能量转换，一部分动能转换为气体的静压能，这样使输出气流具有速度动压头还有静压头，两者之和就是风机全压。 The casing is fixed on the base. The casing acts as a seal, and the intake air at the air inlet obtains kinetic energy through the rotation of the impeller, and the energy is converted in the casing, and a part of the kinetic energy is converted into the static pressure energy of the gas, so that the output airflow has a velocity dynamic pressure head and a static pressure head , the sum of the two is the total pressure of the fan.
机壳进风口可以依需要连接风管，进风口盖板可拆卸，通过螺栓固定连接机壳，机壳的蜗壳形渐开廓线满足风机壳密闭、输送气体同时实现能量高效转换的需要，使输出气流可以达到所需流量与全压。 The air inlet of the casing can be connected to the air duct as required, and the cover plate of the air inlet is detachable, and is connected to the casing by bolts. The volute-shaped involute profile of the casing meets the needs of airtight fan casing and efficient energy conversion while transporting gas. , so that the output airflow can reach the required flow rate and full pressure.
所述机壳进风口盖板通过螺栓固定连接机壳，并且可以拆卸。 The casing air inlet cover plate is fixedly connected to the casing by bolts and can be disassembled.
设备工作时，上干燥区内的湿热尾气受引风机吸引，由下而上穿过空气加热器，与由右向左通过的新鲜空气换热后排空；新鲜空气经预热后由鼓风机鼓入中干燥区，由翅片蒸汽加热器进行再加热，达到所需温度。 When the equipment is working, the hot and humid exhaust gas in the upper drying area is attracted by the induced draft fan, passes through the air heater from bottom to top, exchanges heat with the fresh air passing from right to left, and then is emptied; the fresh air is blown by the blower after preheating It enters the middle drying area and is reheated by the finned steam heater to reach the required temperature.
经翅片蒸汽加热器加热后的高温气体对中干燥区进行热风干燥，中干燥区气流由左向右穿过进行物料干燥，由中隔板端头进行气流折返，由右向左穿过上干燥区，因而有足够的时间与路径来进行物料高效干燥。 The high-temperature gas heated by the finned steam heater performs hot air drying on the middle drying area. The air flow in the middle drying area passes from left to right to dry the material, and the air flow turns back from the end of the middle partition, and passes through the upper part from right to left. Drying area, so there is enough time and path for efficient drying of materials.
物料经过干燥后需要降温才能满足加工与储存要求，因此通过冷空气气流由右向左穿过下干燥区对物料进行冷却，也是对物料利用余热再度干燥，下干燥区的余热气体可由风管连回鼓风机，进一步实现余热回收。 After drying, the material needs to be cooled to meet the processing and storage requirements. Therefore, the cold air flow passes through the lower drying area from right to left to cool the material, which is also to re-dry the material with waste heat. The waste heat gas in the lower drying area can be connected by the air duct. Return to the blower to further realize waste heat recovery.
本发明的引风机叶轮使用时，由于叶片设计成中空楔形，且叶片轴径向中心对称，因而高速旋转时，叶片表面在离心力作用下具有离心自净作用，使灰尘受到离心力作用而无法附着，这样就不会影响叶轮的动态、静态平衡，更不会积累灰尘；这种叶片结构的技术方案，特别适合输送气流量大的宽叶轮引风机采用。 When the induced draft fan impeller of the present invention is used, because the blade is designed to be hollow wedge-shaped, and the blade shaft is symmetrical to the center of the radial direction, when rotating at high speed, the surface of the blade has a centrifugal self-cleaning effect under the centrifugal force, so that the dust cannot be attached due to the centrifugal force. It will not affect the dynamic and static balance of the impeller, and will not accumulate dust; this technical scheme of the blade structure is especially suitable for the wide-impeller induced draft fan with a large air flow.
与现有技术相比，本发明的有益效果还在于： Compared with prior art, the beneficial effect of the present invention also lies in:
尾热利用简洁合理，经过热回收的湿热尾气通过引风机排出，对完成干燥的物料进行有效冷却和进一步尾热利用，促进节能减排；筛孔翻板式干燥机适合水分蒸发量较小，但均匀度较高的物料干燥。 The use of tail heat is simple and reasonable. After heat recovery, the hot and humid tail gas is discharged through the induced draft fan, which effectively cools the dried materials and further utilizes the tail heat to promote energy saving and emission reduction; the sieve flap dryer is suitable for small water evaporation, but Materials with higher uniformity are dried.
叶片设计成中空楔形，且叶片轴径向中心对称，使其所连接的风机背板与面板抗相对扭转、挤压刚性极强，可以杜绝长时间使用造成的风机叶片连接背板根部的断裂。 The blades are designed to be hollow wedge-shaped, and the blade axis is radially and center-symmetrical, so that the fan backboard and panel connected to it can resist relative torsion and have strong extrusion rigidity, which can prevent the fan blade from being broken at the root of the fan blade connection backplane caused by long-term use.
叶片设计成中空楔形，且叶片轴径向中心对称，即使是用较薄的板材制作风机叶轮也能获得较高的强度，保证稳定、可靠使用，既能节省材料，便于制作，也有利于设备的轻巧化。 The blade is designed as a hollow wedge, and the blade axis is symmetrical to the radial center. Even if the fan impeller is made of thinner plates, it can obtain higher strength, ensure stable and reliable use, save materials, facilitate production, and benefit equipment. of lightness.
本发明将引风机叶片巧妙设计成中空楔形，且叶片轴径向中心对称的形状，实现了叶片上灰尘的实时清理，延长了设备的使用寿命并能有效杜绝灰尘积累引发的安全事故，应用前景广阔。 The invention cleverly designs the blade of the induced draft fan into a hollow wedge shape, and the radial center of the blade axis is symmetrical, which realizes the real-time cleaning of the dust on the blade, prolongs the service life of the equipment and can effectively prevent safety accidents caused by dust accumulation. The application prospect broad.
附图说明 Description of drawings
图1是本发明的平面结构示意图 Fig. 1 is the plane structure schematic diagram of the present invention
图2是引风机叶轮的平面结构示意图。 Fig. 2 is a schematic plan view of the impeller of the induced draft fan.
图3是引风机叶轮的剖面结构示意图。 Fig. 3 is a schematic cross-sectional structure diagram of an induced draft fan impeller.
图4是引风机的平面结构示意图。 Fig. 4 is a schematic plan view of the induced draft fan.
图中各标号表示： Each label in the figure means:
A、引风机；C、D均为翻板落料位置；1、进料斗；2、筛孔翻板输送；3、干燥机箱体；4、空气换热器；5、鼓风机；6、蒸汽翅片加热器；7、中间隔板；8、下隔板；9、底隔板；10、11均为风管；31、楔形叶片；32、叶轮外圆；33、叶轮进风口；34、轴座；35、铆钉；36、轴孔；37、叶轮背板；38、叶轮面板；41、叶轮；42、机壳进风口；43、渐开线圆；44、机座；45、机壳；46、机壳进风口盖板；47、机壳出风口；B、机壳出风口宽度。 A. Induced fan; C and D are the flap blanking positions; 1. Feeding hopper; 2. Sieve flap conveying; 3. Dryer box; 4. Air heat exchanger; 5. Blower; 6. Steam Finned heater; 7, middle partition; 8, lower partition; 9, bottom partition; 10, 11 are air ducts; 31, wedge-shaped blade; 32, outer circle of impeller; 33, impeller air inlet; 34, Shaft seat; 35, rivet; 36, shaft hole; 37, impeller back plate; 38, impeller panel; 41, impeller; 42, casing air inlet; 43, involute circle; 44, frame; 45, casing ; 46, the air inlet cover of the casing; 47, the air outlet of the casing; B, the width of the air outlet of the casing.
具体实施方式 Detailed ways
现结合附图，对本发明进一步具体说明。 Now in conjunction with accompanying drawing, the present invention is described in further detail.
如图1、图2、图3和图4所示尾热利用筛孔翻板式干燥机，包括干燥机箱体3和引风机A，干燥机箱体3设有主动轮、被动轮和不锈钢筛板组成自上而下的筛孔翻板式输送2；干燥机箱体3内有中隔板7和下隔板8将干燥机箱体3分为上、中、下三个干燥区；上干燥区经空气换热器4连接引风机A后排空，空气换热器4进气端连通大气，出气端经风管11连接鼓风机5进风口，鼓风机5出风口连接中干燥区内的蒸汽翅片加热器6；所述引风机包括风机叶轮41和机壳45，风机叶轮41包括叶轮背板37、叶轮面板38和叶片31，叶片31布置成叶轮轴径向、中心对称的中空楔形；中空楔形叶片31连接叶轮面板38并与叶轮背板37焊接组成叶轮主体；叶轮面板38设有进风口33、叶轮背板37通过铆钉35固定并连接轴座34，轴座34通过轴孔36与风机轴进行配合连接；机壳45设有进风口42和出风口47，机壳外形轮廓线是渐开线，渐开线圆圆心与风机轴心重合，渐开线从机壳出风口47内侧开始，划线半径随渐开线圆逐渐加大，到机壳出风口47外侧结束，机壳出风口宽度B等于渐开线圆43周长；机壳进风口42设有盖板46，盖板上也有进风口便于连接管道，且轴心和叶轮轴心重合。 As shown in Figure 1, Figure 2, Figure 3 and Figure 4, the tail heat utilization sieve hole flap type dryer includes a dryer cabinet 3 and an induced draft fan A, and the dryer cabinet 3 is composed of a driving wheel, a passive wheel and a stainless steel sieve plate The top-down sieve flap conveyor 2; the dryer cabinet 3 has a middle partition 7 and a lower partition 8 to divide the dryer cabinet 3 into upper, middle and lower drying areas; the upper drying area is replaced by air The heater 4 is connected to the induced draft fan A and then evacuated, the air inlet of the air heat exchanger 4 is connected to the atmosphere, the air outlet is connected to the air inlet of the blower 5 through the air pipe 11, and the air outlet of the blower 5 is connected to the steam fin heater 6 in the drying area The induced draft fan includes a fan impeller 41 and a casing 45, and the fan impeller 41 includes an impeller back plate 37, an impeller panel 38 and a blade 31, and the blade 31 is arranged in a hollow wedge shape that is radial to the impeller axis and symmetrical to the center; the hollow wedge blade 31 is connected The impeller panel 38 is welded with the impeller back plate 37 to form the main body of the impeller; the impeller panel 38 is provided with an air inlet 33, the impeller back plate 37 is fixed by rivets 35 and connected to the shaft seat 34, and the shaft seat 34 is connected to the fan shaft through the shaft hole 36 The casing 45 is provided with an air inlet 42 and an air outlet 47, and the contour line of the casing is an involute, and the center of the involute circle coincides with the fan axis, and the involute starts from the inside of the casing air outlet 47, and the radius of the line is As the involute circle gradually increases, it ends outside the air outlet 47 of the casing, and the width B of the air outlet of the casing is equal to the circumference of the involute circle 43; the air inlet 42 of the casing is provided with a cover plate 46, and an air inlet is also arranged on the cover plate It is easy to connect the pipeline, and the axis coincides with the axis of the impeller.
所述下干燥区经风管10连回鼓风机5，进一步实现尾热利用。 The lower drying area is connected back to the air blower 5 through the air duct 10 to further realize tail heat utilization.
所述干燥机箱体设有进料斗1和出料斗，实现连续化的进料干燥。 The box body of the dryer is provided with a feed hopper 1 and a discharge hopper to realize continuous feed drying.
所述机壳45固定在机座44上。机壳45起到封闭作用，进风口42进气通过叶轮41旋转获得动能，并在机壳45内进行能量转换，一部分动能转换为气体的静压能，这样使输出气流具有速度动压头还有静压头，两者之和就是风机全压。 The casing 45 is fixed on the base 44 . The casing 45 acts as a seal, and the air inlet 42 obtains kinetic energy through the rotation of the impeller 41, and the energy is converted in the casing 45, and a part of the kinetic energy is converted into the static pressure energy of the gas, so that the output airflow has a velocity and a dynamic pressure head. There is a static pressure head, and the sum of the two is the total pressure of the fan.
机壳进风口42可以依需要连接风管，进风口盖板46可拆卸，通过螺栓固定连接机壳45，机壳45的蜗壳形渐开廓线满足风机壳密闭、输送气体同时实现能量高效转换的需要，使输出气流可以达到所需流量与全压。 The air inlet 42 of the casing can be connected to the air duct as required. The air inlet cover 46 is detachable and connected to the casing 45 by bolts. The volute-shaped involute profile of the casing 45 satisfies the airtightness of the fan casing and realizes energy delivery at the same time. The need for high-efficiency conversion enables the output airflow to reach the required flow and full pressure.
所述机壳进风口盖板46通过螺栓固定连接机壳15，并且可以拆卸。 The casing air inlet cover plate 46 is fixedly connected to the casing 15 by bolts, and can be disassembled.
设备工作时，上干燥区内的湿热尾气受引风机A吸引，由下而上穿过空气加热器4，与由右向左通过的新鲜空气换热后排空；新鲜空气经预热后由鼓风机5鼓入中干燥区，由翅片蒸汽加热器6进行再加热，达到所需温度。 When the equipment is working, the hot and humid tail gas in the upper drying area is attracted by the induced draft fan A, passes through the air heater 4 from bottom to top, exchanges heat with the fresh air passing from right to left, and then is emptied; The blower 5 blows into the middle drying area, and is reheated by the finned steam heater 6 to reach the required temperature.
经翅片蒸汽加热器6加热后的高温气体对中干燥区进行热风干燥，中干燥区气流由左向右穿过进行物料干燥，由中隔板7端头进行气流折返，由右向左穿过上干燥区，因而有足够的时间与路径来进行物料高效干燥。 The high-temperature gas heated by the finned steam heater 6 performs hot air drying on the middle drying area. The air flow in the middle drying area passes from left to right to dry the material, and the air flow turns back from the end of the middle partition 7 and passes from right to left. Through the upper drying area, there is enough time and path for efficient drying of materials.
物料经过干燥后需要降温才能满足加工与储存要求，因此通过冷空气气流由右向左穿过下干燥区对物料进行冷却，也是对物料利用余热再度干燥，下干燥区的余热气体可由风管10连回鼓风机5，进一步实现余热回收。 After drying, the material needs to be cooled to meet the processing and storage requirements. Therefore, the cold air flow passes through the lower drying area from right to left to cool the material, which is also to re-dry the material with waste heat. Connect back to blower 5 to further realize waste heat recovery.
本发明的引风机叶轮使用时，由于叶片设计成中空楔形，且叶片轴径向中心对称，因而高速旋转时，叶片表面在离心力作用下具有离心自净作用，使灰尘受到离心力作用而无法附着，这样就不会影响叶轮的动态、静态平衡，更不会积累灰尘；这种叶片结构的技术方案，特别适合输送气流量大的宽叶轮引风机采用。 When the induced draft fan impeller of the present invention is used, because the blade is designed to be hollow wedge-shaped, and the blade shaft is symmetrical to the center of the radial direction, when rotating at high speed, the surface of the blade has a centrifugal self-cleaning effect under the centrifugal force, so that the dust cannot be attached due to the centrifugal force. It will not affect the dynamic and static balance of the impeller, and will not accumulate dust; this technical scheme of the blade structure is especially suitable for the wide-impeller induced draft fan with a large air flow.
上述只是本发明的较佳实施例，并非对本发明作任何形式上的限制。任何熟悉本领域的技术人员，在不脱离本发明技术方案范围的情况下，都可利用上述揭示的技术内容对本发明技术方案做出许多可能的变动和修饰，或修改为等同变化的等效实施例。因此，凡是未脱离本发明技术方案的内容，依据本发明技术实质对以上实施例所做的任何简单修改、等同变化及修饰，均应落在本发明技术方案保护的范围内。 The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Any person familiar with the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent implementation of equivalent changes example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.
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| CN107388796A (en) * | 2017-09-12 | 2017-11-24 | 无锡市强力干燥设备厂 | Multilayer conveyor type dryer |
| CN115769039A (en) * | 2020-07-30 | 2023-03-07 | 塞泰克股份公司 | Dryer with cooling function |
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