WO2024094138A1 - 一种加热装置 - Google Patents

一种加热装置 Download PDF

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Publication number
WO2024094138A1
WO2024094138A1 PCT/CN2023/129415 CN2023129415W WO2024094138A1 WO 2024094138 A1 WO2024094138 A1 WO 2024094138A1 CN 2023129415 W CN2023129415 W CN 2023129415W WO 2024094138 A1 WO2024094138 A1 WO 2024094138A1
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WO
WIPO (PCT)
Prior art keywords
heating device
shell
baffle
temperature
rod
Prior art date
Application number
PCT/CN2023/129415
Other languages
English (en)
French (fr)
Inventor
童欢
方杰
Original Assignee
阿特拉斯·科普柯(无锡)压缩机有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 阿特拉斯·科普柯(无锡)压缩机有限公司 filed Critical 阿特拉斯·科普柯(无锡)压缩机有限公司
Publication of WO2024094138A1 publication Critical patent/WO2024094138A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/34—Regenerating or reactivating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/128—Preventing overheating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/219—Temperature of the water after heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
    • F24H9/1863—Arrangement or mounting of electric heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices

Definitions

  • the present application relates to the technical field of heating devices, and in particular to a heating device for an adsorption dryer.
  • the heating device is a key component of the adsorption dryer.
  • the adsorption dryer regenerates the adsorbent in the adsorption dryer through the heating device.
  • the regenerated adsorbent can again adsorb the saturated compressed gas delivered by the front-end air compressor. This cyclic regeneration of the adsorbent can reduce the cost of use and obtain compressed gas with a low dew point.
  • the present application aims to provide a heating device, which provides a solution to one or more of the aforementioned problems.
  • a heating device includes a shell, an electric heating tube is arranged inside the shell, an air inlet and an air outlet are respectively arranged at opposite ends of the shell, and at least one baffle is arranged inside the shell in a direction from the air inlet to the air outlet, the area of the baffle is smaller than the cross-sectional area of the shell, and the first baffle among the baffles is arranged opposite to the air inlet.
  • the baffle is in an arcuate shape, and the area of the arcuate shape is larger than the area of 1/2 of a circle with the same radius. Furthermore, air holes are provided on the baffle.
  • a plurality of the baffles are arranged sequentially in the length direction within the shell, and the arcs of adjacent baffles face in opposite directions.
  • At least one pull rod is disposed inside the housing, and the baffle is sleeved on the pull rod.
  • the multiple tie rods are arranged in parallel, corresponding tie rod holes are arranged on the baffle plate, and the baffle plate is sleeved on the multiple tie rods through the tie rod holes.
  • a fixing plate is disposed inside the housing, and the pull rod is disposed inside the housing through the fixing plate.
  • thermocouple temperature rod is horizontally arranged inside the housing, and one end of the thermocouple temperature rod is electrically connected to a mechanical overheat protection switch.
  • thermocouple temperature rod is located in a closed temperature control tube, the temperature control tube passes through the center of the baffle, and the other end of the thermocouple temperature rod extends to between two adjacent baffles in the middle of the shell.
  • a temperature sensor is vertically arranged at the top of the air outlet, and the temperature sensor is connected to a controller that can alarm and shut down when overheating occurs.
  • the present application can effectively control the flow of fluid inside the heating device by reasonably setting the baffle structure and layout and arranging the position of the temperature measuring device.
  • the heat exchange efficiency of the heating device is higher, the temperature detection is more accurate, the energy consumption is greatly reduced, the false alarm is reduced, and the service life of the heating device is extended.
  • the pressure drop of the heating device is lower, the air flow is smooth, and the working efficiency of the heating device is greatly improved.
  • FIG1 is a schematic diagram of a transverse cross-sectional structure of a heating device provided by the present application.
  • FIG2 is a schematic diagram of a longitudinal cross-sectional structure of a heating device provided by the present application.
  • FIG3 is a schematic structural diagram of a baffle in a heating device provided in the present application.
  • FIG4 is a schematic diagram of the structure of a fixing plate in a heating device provided by the present application.
  • Reference numerals 1- Chamber cover; 2- Wiring chamber protective cover; 3- Heat dissipation area; 4- Tube sheet flange; 5- Baffle; 51- Air vent; 52-pull rod hole; 53-temperature measuring hole; 6-electric heating tube; 7-temperature control tube; 71-thermocouple temperature rod; 8-pull rod; 9-fixing plate; 10-power cable inlet; 11-temperature control cable inlet; 12-housing; 121-air inlet; 122-air outlet.
  • the terms “install”, “connect”, “connect”, “weld”, “fix” and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements.
  • install can be a fixed connection, a detachable connection, or an integral one
  • it can be a mechanical connection, an electrical connection, or can communicate with each other
  • it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements.
  • the heating device includes a housing 12, and an air inlet 121 and an air outlet 122 are respectively arranged at opposite ends of the housing, preferably, the air inlet 121 and the air outlet 122 are located on the same side of the housing.
  • An electric heating tube 6 is arranged in the housing 12, and the electric heating tube 6 is extended along the length direction of the housing 12.
  • At least one baffle 5 is disposed inside the housing 12 in a direction from the air inlet 121 to the air outlet 122 .
  • the baffle 5 is made of 304 stainless steel.
  • each baffle 5 is smaller than the cross-sectional area of the shell 12, which is conducive to forming an air flow channel in the shell 12.
  • the air flow entering from the air inlet 121 passes between each baffle 5 and the inner wall of the shell 12 to enhance the heat exchange effect.
  • the first baffle 5 of the plurality of baffles 5 is arranged opposite to the air inlet 121.
  • the high-speed and high-pressure airflow entering through the air inlet 121 impacts the wall surface of the housing 12 and the baffle 5, so that the moving direction of the airflow is changed, the flow speed is also reduced to a certain extent, and there is a tendency to move away from the wall surface after rebounding, and the subsequent baffle 5 can be more effectively controlled and guided to flow, thereby greatly improving the heat exchange efficiency between the fluid and the heating device.
  • the shape of the baffle 5 is an arcuate shape, and the area of the arcuate shape is greater than 1/2 of the area of a circle with the same radius.
  • the area of the arcuate shape is more preferably 3/4 of the area of a circle with the same radius.
  • the arcs of the baffles 5 are staggered and orderly staggered inside the shell 12.
  • the arcs of the adjacent baffles 5 are in opposite directions, that is, if the arc of one baffle 5 faces upward, the arcs of the adjacent 1 or 2 baffles 5 face downward, and the spacing is consistent, so that the multiple baffles 5 can be arranged symmetrically up and down in sequence according to the central axis of the shell 12, which can effectively guide the fluid to flow inside the heating device cavity.
  • the pressure loss is preferably between 15-30mbar.
  • the number and position of the baffles 5 of this embodiment can effectively guide the fluid to flow inside the heating device and efficiently exchange heat with the electric heating tubes 6 in the heating device.
  • the adaptability of the heating device to the working conditions can be improved, and the working efficiency of the heating device can be further improved.
  • the number of the electric heating tubes 6 is 3-40, the length is 1-2 meters, and the number of the baffles 5 is 5-10.
  • the power of the heating device reaches 90kw, 30 electric heating tubes 6 are used, each of the electric heating tubes 6 is 1.5 meters long, and the number of baffles 5 is set to 7.
  • the power of the heating device reaches 115kw, 36 electric heating tubes 6 are used, each of the electric heating tubes 6 is 1.7 meters long, and the number of baffles 5 is set to 8.
  • At least one pull rod 8 is provided inside the shell 12, the pull rod 8 is provided along the length direction of the shell 2, and the baffle 5 is sleeved on the pull rod 8.
  • a fixing plate 9 is also included inside the housing 12, and the fixing plate is arranged At the end of the housing 2, the fixing plate 9 is perpendicular to the length direction of the housing 2, the fixing plate 9 adopts a circular structure, the size of the fixing plate 9 is consistent with the cross section of the housing 12, and the tie rod 8 is connected thereto. Specifically, the fixing plate 9 is connected to the tie rod 8 by spot welding. Thus, the position of the tie rod 8 is fixed by the fixing plate 9, and the tie rod 8 will not rotate in the housing 12.
  • the number of the fixing plates 9 may be one or more, and the fixing plates 9 are arranged at a position where the pressure drop inside the shell is minimal.
  • a temperature measuring hole 53 and a tie rod hole 52 are provided on the baffle plate 5 .
  • the baffle plate 5 is sleeved on the tie rod 8 through the tie rod hole 52 .
  • the temperature measuring hole 52 is used to set a temperature measuring device.
  • the number of the tie rods 8 can be multiple, and the multiple tie rods 8 are arranged in parallel in the housing 12.
  • three tie rods 8 can be used, and for this purpose, three tie rod holes 52 can be arranged at any position on the baffle 5.
  • the three tie rod holes 52 form a stable triangular shape, and the three tie rods 8 respectively pass through the tie rod holes 52 provided on the baffle 5 , so that the position of the baffle 5 is fixed by the tie rods 8 .
  • a plurality of air holes 51 are further provided on the baffle 5, and the air holes 51 can increase the air flow permeability of the baffle 5, eliminate the local turbulence formed behind the baffle 5, solve the problem of heat accumulation in the dead zone, and thus solve the problem of overheating failure of the heating device.
  • the air holes 51 can increase the air flow permeability of the baffle 5, eliminate the local turbulence formed behind the baffle 5, solve the problem of heat accumulation in the dead zone, and thus solve the problem of overheating failure of the heating device.
  • a temperature measuring hole 53 is provided at the center of the circular structure on the baffle 5, three pull rod holes 52 are provided at the left, middle and right positions on the baffle 5 respectively, and a plurality of air holes 51 are evenly distributed on the baffle 5.
  • the air holes 51 on the baffle 5 have a permeability of 80%, where the permeability is the ratio of the area of the air holes 51 to the area of the baffle 5.
  • the velocity in the area formed between each two baffles 5 is equivalent and does not exceed the maximum design flow rate.
  • a hollow temperature control tube 7 is arranged in the middle of the shell 12, which has a built-in thermocouple temperature rod 71, and one end of the thermocouple temperature rod 71 is electrically connected to, for example, a mechanical overheating protection switch.
  • the temperature control tube 7 and the thermocouple temperature rod 71 therein can pass through the temperature measuring hole 53 at the center of the baffle 5.
  • thermocouple temperature rod 71 is extended and arranged between two adjacent baffles 5 located in the middle of the shell 12. This can simultaneously avoid the thermocouple temperature rod 71 from being too close to the baffle 5 and the electric heating tube 6, reduce the thermal radiation effect of the baffle 5 and the electric heating tube 6 on the thermocouple temperature rod 71, and combine with the existing temperature control logic to better monitor the temperature inside the shell 12 of the heating device, thereby accurately controlling the operation of the heating device.
  • the position setting of the thermocouple temperature rod 71 is based on the control logic of the heating device and the calculated temperature field distribution result, so that the heating device can operate in a normal working state, and the temperature of the heating device itself and the temperature of the heated fluid are both within a reasonable range.
  • the critical temperature for example 400°C, the heating device will be shut down due to the protection of the mechanical overheating protection switch electrically connected to the thermocouple temperature rod 71.
  • the temperature distribution on the cross-section of the bottom of the air outlet 122 of the heating device is not uniform, and the temperature difference can reach hundreds of degrees Celsius. If the temperature sensor is placed in a low temperature zone, the measured fluid temperature is too low. Considering the continuous heating of the heating device, there is a risk of burning; if the temperature sensor is placed in a high temperature zone, the measured fluid temperature is too high, so that the air at the air outlet 122 does not meet the heating requirements.
  • the temperature sensor is vertically arranged at the top of the air outlet 122, thereby effectively reducing the influence of the high temperature zone and the low temperature zone on the temperature measurement.
  • the temperature sensor is connected to the controller of the electric control cabinet. In a specific embodiment, when the pressure loss is set to 30mbar, the controller is programmed to set the protection temperature of the air outlet 122 to 240°C for alarm and 250°C for shutdown. Such parameter settings can enable the heating device to obtain the best heat exchange efficiency and the best working safety temperature zone.
  • the temperature sensor is preferably a resistive temperature sensor, model PT1000.
  • the flow of the fluid inside the heating device can be effectively controlled, the heat exchange efficiency of the heating device is higher, the temperature detection is more accurate, the energy consumption is greatly reduced, the false alarm is reduced, and the time is extended.
  • the service life of the heating device is prolonged.
  • the pressure drop of the heating device is lower and the air flow is smooth, which greatly improves the working efficiency of the heating device.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)

Abstract

本公开提供了一种加热装置，包括一壳体，在所述壳体的内部设置电加热管，其特征在于，在所述壳体相对的两端分别设置进风口和出风口，在所述壳体的内部从所述进风口到所述出风口的方向上设置至少一个挡板，所述挡板的面积小于所述壳体的截面面积，所述挡板中的第一个挡板设置在所述进风口的对面。本申请能有效控制流体在加热装置内部流动，加热装置的热交换效率较高，温度探测更加精确，大大降低了能耗，减少了误报警，同时延长了加热装置的使用寿命。

Description

一种加热装置 技术领域
本申请涉及加热装置技术领域，具体而言，涉及一种吸附式干燥机的加热装置。
背景技术
加热装置是吸附式干燥机上的关键组成部件，吸附式干燥机通过加热装置对吸附式干燥机中的吸附剂进行再生，再生后的吸附剂能再次吸附前端空压机输送的饱和压缩气体，如此循环再生吸附剂，能降低使用成本，得到低露点的压缩气体。
现有的加热装置存在诸多问题，例如，气流经过加热腔体时，温度不均匀，容易集中产生死区，温度传感器探测不到加热腔体内的最高温度，烧毁加热装置；或者温度传感器一直探测到气流集聚区的温度，很容易触发温度报警导致机器停机，但实际上加热装置的出口温度还没有达到吸附式干燥机中的吸附剂再生程序设定的温度。
申请内容
有鉴于此，本申请旨在提供一种加热装置，针对前述的问题中的一个或多个提供解决方案。
根据本申请实施例的一种加热装置，其包括一壳体，在所述壳体的内部设置电加热管，在所述壳体相对的两端分别设置进风口和出风口，在所述壳体的内部从所述进风口到所述出风口的方向上设置至少一个挡板，所述挡板的面积小于所述壳体的截面面积，所述挡板中的第一个挡板设置在所述进风口的对面。
在一些实施例中，所述挡板为弓形形状，且弓形面积大于相同半径的1/2圆面积。进一步地，在所述挡板上还设置透气孔。
在一些实施例中，多个所述挡板在所述壳体内沿长度方向上依次布置，相邻的所述挡板的弓形圆弧朝向相反。
在一些实施例中，在所述壳体的内部设置至少一个拉杆，所述挡板套设在所述拉杆上。
在一些实施例中，所述拉杆为多个时，多个所述拉杆平行设置，在所述挡板上设置对应的拉杆孔，所述挡板通过所述拉杆孔套设在多个所述拉杆上。
在一些实施例中，所述拉杆孔为3个，3个所述拉杆孔形成三角形形状。
在一些实施例中，在所述壳体的内部设置固定板，所述拉杆通过所述固定板设置在所述壳体内。
在一些实施例中，在所述壳体的内部水平设置一热电偶温度杆，所述热电偶温度杆的一端电连接到一机械式过热保护开关。
在一些实施例中，所述热电偶温度杆位于一封闭的温控管中，所述温控管穿过所述挡板的圆心，所述热电偶温度杆的另一端伸至所述壳体中部的相邻两个所述挡板之间。
在一些实施例中，所述出风口的顶端竖直设置有温度传感器，所述温度传感器连接至可过热报警和停机的控制器。
本申请通过合理设置挡板结构和布局，合理布置测温装置的位置，能有效控制流体在加热装置内部流动，加热装置的热交换效率较高，温度探测更加精确，大大降低了能耗，减少了误报警，同时延长了加热装置的使用寿命。加热装置的压降更低，气流通畅，大大提高了加热装置的工作效率。
本申请的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
图1是本申请所提供的一加热装置的横向剖面结构示意图；
图2是本申请所提供的一加热装置的纵向剖面结构示意图；
图3是本申请所提供的一加热装置中挡板的结构示意图；
图4是本申请所提供的一加热装置中固定板的结构示意图；
附图标记：
1-腔室盖；2-接线腔防护罩；3-散热区；4-管板法兰；5-挡板；51-
透气孔；52-拉杆孔；53-测温孔；6-电加热管；7-温控管；71-热电偶温度杆；8-拉杆；9-固定板；10-电源电缆入口；11-控温电缆入口；12-壳体；121-进风口；122-出风口。
具体实施方式
下面，结合附图对本申请的具体实施例进行详细的描述，但不作为本申请的限定。
应理解的是，可以对此处公开的实施例做出各种修改。因此，上述说明书不应该视为限制，而仅是作为实施例的范例。还应当理解，尽管已经参照一些具体实例对本申请进行了描述，但本领域技术人员能够确定地实现本申请的很多其它等效形式，它们具有如权利要求所述的特征并因此都位于借此所限定的保护范围内。
包含在说明书中并构成说明书的一部分的附图示出了本申请的实施例，并且与上面给出的对本申请的大致描述以及下面给出的对实施例的详细描述一起用于解释本申请的原理。
需要说明的是，本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
在本申请的描述中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“焊接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接或可以互相通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请的描述中，术语“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、 “水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
此外，在本申请的描述中，术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本申请，而不能理解为对本申请的限制。
参照图1和图2所示，根据本申请实施例的加热装置，其包括壳体12，在所述壳体相对的两端分别设置进风口121和出风口122，优选地，所述进风口121和所述出风口122位于壳体的同一侧。所述壳体12内设置电加热管6，所述电加热管6沿所述壳体12的长度方向延伸设置。
进一步地，在所述壳体12内部从所述进风口121到所述出风口122的方向上设置至少一个挡板5，具体地，所述挡板5的材质采用304不锈钢。
进一步地，每个所述挡板5的面积均小于所述壳体12的截面面积，这样有利于在所述壳体12内形成气流通道，从所述进风口121进入的气流从每个所述挡板5与所述壳体12的内壁之间穿过，以提升换热效果。
在一些可选的实施方式中，当在所述壳体12内具有多个所述挡板5的情况下，多个所述挡板5中的第一个挡板5设置在所述进风口121的对面。通过所述进风口121进入的高速高压气流冲击所述壳体12的壁面以及挡板5，使得所述气流的运动方向被改变，流动速度也有一定的降低，并且在反弹后有远离壁面的运动趋势，可以更有效地被后续的所述挡板5控制引导流动，大大提高了流体与所述加热装置的热交换效率。
在所述壳体12的截面为圆形的情况下，不同的形状挡板的流通面积不同，合理的流通面积得到最优的流速。在一些可选的实施方式中，所述挡板5的形状是弓形，所述弓形的面积大于相同半径的1/2圆形面积。所述弓形的面积更优选为相同半径的3/4圆形面积。
在一些可选的实施方式中，沿着所述电加热管6的水平延伸方向，所述挡板5的弓形圆弧相互错开设置，有序交错分布在所述壳体12内部。优选地，相邻所述挡板5的弓形圆弧的朝向相反，即一个所述挡板5的弧形朝上，则其相邻的1个或2个所述挡板5的弧形朝下，且间距保持一致，这样，多个所述挡板5能够根据所述壳体12的中心轴依次上下对称设置，可以有效引导流体在加热装置腔内部流动。
通过模拟温度场得知：压损过大，气流分布不均，局部温度过高，容易出现死区；压损过低，气流过快，换热效果差，达不到加热装置使用温度和换热效率，压损优选在15-30mbar。
本实施例的所述挡板5的数量及位置可以有效引导流体在所述加热装置内部流动，高效地与所述加热装置中的所述电加热管6进行热交换。通过改变所述电加热管6的数量和长度以及所述挡板5的数量，能够提高加热装置对工况需求的适应性，进一步提高加热装置的工作效率。可选地，所述电加热管6的数量为3-40个，长度1-2米，所述挡板5的数量为5-10块。
根据工况需求，在本申请一具体实施例中，所述加热装置的功率达到90kw，采用30个所述电加热管6，每个所述电加热管6的长度为1.5米，所述挡板5的数量设置为7块。
根据工况需求，在本申请一具体实施例中，所述加热装置的功率达到115kw，采用36个所述电加热管6，每个所述电加热管6的长度为1.7米，所述挡板5的数量设置为8块。
在一些可选的实施方式中，为了在所述壳体12的内部固定所述挡板5，在所述壳体12的内部设置至少一个拉杆8，所述拉杆8沿着所述壳体2的长度方向设置，所述挡板5套设在所述拉杆8上。
进一步地，在所述壳体12的内部还包括固定板9，所述固定板设置在 所述壳体2的端部，所述固定板9与所述壳体2的长度方向相互垂直，所述固定板9采用圆形结构，所述固定板9的尺寸与所述壳体12的截面保持一致，并在其上连接所述拉杆8。具体地，所述固定板9与所述拉杆8通过点焊连接。由此，通过所述固定板9固定所述拉杆8的位置，所述拉杆8不会在所述壳体12内转动。
在一些优选的实施方式中，所述固定板9的数量可以是1个或者多个，所述固定板9设置在壳体内部压降最小的位置。
参照图3所示的一具体实施例，所述挡板5上设置测温孔53和拉杆孔52，所述挡板5通过所述拉杆孔52套设在所述拉杆8上，所述测温孔52用于设置测温装置。
在本实施例中，所述拉杆8的数量可以为多个，多个所述拉杆8在所述壳体12内平行设置。具体地，在本实施例中可以采用3个所述拉杆8，为此可以在所述挡板5上的任意位置设置3个所述拉杆孔52。
在其中一个实施例中，3个所述拉杆孔52形成三角形的稳定形状，3个所述拉杆8分别穿过所述挡板5上设置的所述拉杆孔52，从而通过所述拉杆8固定所述挡板5的位置。
在一些可选的实施方式中，在所述挡板5上还设置多个透气孔51，所述透气孔51能够增加所述挡板5对于气流的通透率，消除所述挡板5后方形成的局部湍流，解决死区积热的问题，从而解决所述加热装置的过热失效的问题。通过计算及实践，没有温度集聚的死区，加热腔内没有达到600℃以上的高温区，不会导致加热装置烧毁，大大提高了加热装置的使用寿命。
具体地，在一个具体的实施方式中，在所述挡板5上的圆形结构正中圆心处设置1个测温孔53，在所述挡板5上的左中右三个位置分别设置3个拉杆孔52，在所述挡板5上均匀分布多个所述透气孔51，所述挡板5上的所述透气孔51的通透率为80％，这里的所述通透率为透气孔51的面积与挡板5的面积之比。这里气流在所述壳体12内从所述进风口121向所述出风口122流动时，通过每两个所述挡板5之间形成的区域内的速率相当，且没有超过最大设计流速。
在一些可选的实施方式中，在位于所述壳体12中部设置中空的温控管7，其内置一热电偶温度杆71，所述热电偶温度杆71的一端电连接到例如机械式过热保护开关，这里的所述温控管7和其中的热电偶温度杆71可以穿过所述挡板5圆心处的测温孔53。
优选地，所述热电偶温度杆71的另一端延伸设置在位于所述壳体12中部的相邻的两个所述挡板5之间，这样能够同时避免所述热电偶温度杆71与所述挡板5以及所述电加热管6距离过近，减少所述挡板5以及所述电加热管6对热电偶温度杆71的热辐射影响，结合现有的温度控制逻辑，更好地监控所述加热装置的所述壳体12内部的温度，从而精确地控制所述加热装置运行。
所述热电偶温度杆71的位置设定是结合加热装置的控制逻辑与计算得到的温度场分布结果，实现了加热装置可以运行在正常的工作状态，且加热装置自身温度与被加热流体温度都在合理的范围内，到临界温度，例如400℃，加热装置会因热电偶温度杆71电连接的机械式过热保护开关保护而停机。
通过分析计算得到的温度场分布结果可知，所述加热装置的所述出风口122底部的横截面上温度分布并不均匀，温差可达上百摄氏度，如果所述温度传感器放置在低温区，则导致测得的流体温度过低，考虑到所述加热装置的持续加热，有烧毁的风险；如果所述温度传感器放置在高温区，则导致测得的流体温度过高，使得所述出风口122的空气不满足加热需求。
在一些可选的实施方式中，将所述温度传感器竖直设置在所述出风口122的顶端，从而有效降低高温区和低温区对测温的影响。所述温度传感器连接至电控柜的控制器，在一具体实施例中，当压损设置为30mbar时，控制器的程序设计所述出风口122的保护温度为240℃报警，250℃停机。这样的参数设置能让加热装置得到最佳换热效率和最佳工作安全温度区。所述温度传感器优选为电阻式温度传感器，型号为PT1000。
在本说明书的描述中，通过合理设置挡板结构和布局，合理布置测温装置的位置，能有效控制流体在加热装置内部流动，加热装置的热交换效率较高，温度探测更加精确，大大降低了能耗，减少了误报警，同时延长 了加热装置的使用寿命。加热装置的压降更低，气流通畅，大大提高了加热装置的工作效率。
除上述以外，还需要说明的是在本说明书中所谈到的“一个实施例”、“另一个实施例”、“实施例”等，指的是结合该实施例描述的具体特征、结构或者特点包括在本申请概括性描述的至少一个实施例中。在说明书中多个地方出现同种表述不是一定指的是同一个实施例。进一步来说，结合任一实施例描述一个具体特征、结构或者特点时，所要主张的是结合其他实施例来实现这种特征、结构或者特点也落在本发明的范围内。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种加热装置，其包括一壳体，在所述壳体的内部设置电加热管，其特征在于，在所述壳体相对的两端分别设置进风口和出风口，在所述壳体的内部从所述进风口到所述出风口的方向上设置至少一个挡板，所述挡板的面积小于所述壳体的截面面积，所述挡板中的第一个挡板设置在所述进风口的对面。
  2. 根据权利要求1所述的加热装置，其特征在于，所述挡板为弓形形状，且弓形面积大于相同半径的1/2圆面积，在所述挡板上还设置透气孔。
  3. 根据权利要求2所述的加热装置，其特征在于，多个所述挡板在所述壳体内沿长度方向上依次布置，相邻的所述挡板的弓形圆弧朝向相反。
  4. 根据权利要求1或2所述的加热装置，其特征在于，在所述壳体的内部设置至少一个拉杆，所述挡板套设在所述拉杆上。
  5. 根据权利要求4所述的加热装置，其特征在于，所述拉杆为多个时，多个所述拉杆平行设置，在所述挡板上设置对应的拉杆孔，所述挡板通过所述拉杆孔套设在多个所述拉杆上。
  6. 根据权利要求4所述的加热装置，其特征在于，所述拉杆孔为3个，3个所述拉杆孔形成三角形形状。
  7. 根据权利要求4所述的加热装置，其特征在于，在所述壳体的内部设置固定板，所述拉杆通过所述固定板设置在所述壳体内。
  8. 根据权利要求1或2所述的加热装置，其特征在于，在所述壳体的内部水平设置一热电偶温度杆，所述热电偶温度杆的一端电连接到一机械式过热保护开关。
  9. 根据权利要求8所述的加热装置，其特征在于，所述热电偶温度杆位于一封闭的温控管中，所述温控管穿过所述挡板的圆心，所述热电偶温度杆的另一端伸至所述壳体中部的相邻两个所述挡板之间。
  10. 根据权利要求1或2所述的加热装置，其特征在于，所述出风口的顶端竖直设置有温度传感器，所述温度传感器连接至可过热报警和停机的控制器。
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