Electromagnetic wave conduction oil heater

[0015] Figure 1 ~ Figure 3 Shows an electromagnetic waveguide hot oil heater, which is characterized in that it is provided with a cylindrical shell 3, which is coaxially fixed with the cylindrical wall 32 and connected to the upper cover 31 of the shell, and has a number of overcurrents on the top circumference. The cylindrical middle partition 5 of the notch 52 and the cylindrical inner partition 6 hermetically connected with the upper cover of the casing. The above-mentioned middle partition 5 and the inner partition 6 extend to the bottom of the cylindrical wall to separate the space inside the cylindrical wall Into an outer cavity 321, a middle cavity 51 and an inner cavity 61. In this example, there are 8 over-current gaps around the top of the middle partition plate 5. The outer cavity 321 and the middle cavity 51 are circular, and the inner cavity 61 is cylindrical; in the outer cavity, the middle cavity, and the inner cavity, more than one layer of continuously and vertically arranged electromagnetic wave heating tubes 4 are respectively fixedly arranged around the respective cavities. In this example, a layer of electromagnetic wave heating tubes are respectively arranged in the outer cavity and the middle cavity, and two layers of electromagnetic wave heating tubes are arranged in the inner cavity; the lower end of the electromagnetic wave heating tube 4 extends to the bottom of the cylindrical wall, and the upper terminal extends out of the shell The upper cover 31 is connected to the power supply terminal board 2 provided on the upper part of the upper cover; a shunt cover 8 covering the bottom edge of the cylindrical middle partition 5 is provided at the bottom of the inner side of the housing, and the shell bottom 33 and shunt cover 8 are both arc-shaped The space at the bottom of the housing is divided by the shunt cover 8 into an inner shunt cavity 81 communicating with the middle cavity 51 and the inner cavity 61 and an outer shunt cavity 82 communicating with the outer cavity 321; the bottom of the housing is connected with the heat transfer oil inlet 9 and the upper part of the inner cavity The heat transfer oil outlet 1 is connected through the upper cover 31 of the housing.

[0016] An insulation layer 11 is arranged on the outside of the shell, and the insulation layer 11 is made of rock wool insulation material.

[0017] The bottom of the shunt cover 8 is provided with a discharge port 10 extending out of the housing for discharging the heat transfer oil in the middle cavity, the inner cavity and the inner shunt cavity 81 during maintenance.

[0018] In actual production, a bracket 7 for fixing the electromagnetic wave heating tube is provided in the housing 3. The bracket 7 is composed of a central pillar 73 and upper and lower horizontal fixing frames 71 and 72 fixedly connected to the upper and lower ends thereof. The upper and lower horizontal fixing frames 71, 72 are respectively fixed to the upper and bottom of the inner partition 6 by welding. The upper edges of the middle partition 5 and the inner partition 6 are fixed to the upper cover 31 of the housing by welding, and the middle partition 5 A number of over-flow gaps 52 are circumferentially opened at the connection point between the top of the A and the housing 31. The upper part of the electromagnetic wave heating tube 4 is fixed to the upper cover 31 by welding, and the upper terminal extends out of the shell upper cover 31 and is connected to the power terminal board 2 provided on the upper cover. The lower end of the electromagnetic wave heating tube 4 is welded and fixed to the central partition 5 on. The shunt cover 8 is fixed on the central partition 5 by welding.

[0019] In this embodiment, the above-mentioned electromagnetic wave heating tube adopts the HGR series infrared electromagnetic wave heating tube model HGR-M-50 produced by Baoding Sanai Energy Technology Development Co., Ltd. The surface material of the heating element is SiO 2 It is the main carrier and adds a variety of trace elements, as well as materials such as metals, non-metal oxides, fluorides, nitrides, carbides or borides, to form a new type of high emissivity ceramic body after high temperature sintering. The heating form is heating by radiation heat transfer, with high emissivity, uniform radiation and strong penetration, so that the heated material can achieve the effect of simultaneous heating of the surface and the interior. Part of the energy of the heating wire of the infrared electromagnetic heating tube is emitted in the form of infrared electromagnetic waves, and the other part is emitted in the form of visible light. The ceramic heating tube has the characteristics of directional radiation and can convert visible light components into infrared electromagnetic wave thermal energy, reducing internal energy The heat conversion efficiency of electric energy can reach about 90%, especially the melting points of the contained components are between 1700℃~2500℃, the chemical properties are stable and the service life is long.

[0020] Such as image 3 As shown, the arrow in the figure indicates the flow direction of the heat transfer oil. During operation, the heat-conducting oil enters the housing from the heat-conducting oil inlet 9 at the bottom of the housing 3, enters the outer cavity 321 through the outer shunt cavity 82 under the action of the shunt cover 8, and heats from the inner cavity 41 of the electromagnetic wave heating tube and the outside of the pipe. ; Flowing into the middle cavity 51 at the over-flow gap 52 between the middle partition 5 and the upper cover 31, as the inner partition 6 and the upper cover 31 are hermetically connected, the heat-conducting oil flows down the middle cavity and continues from the The electromagnetic wave heating tube in the middle cavity 51 passes through the inner cavity 41 and the outside of the tube for heating; after descending to the bottom of the middle cavity 51, it enters the inner shunt cavity 81, and returns upwards and flows into the inner cavity 61 under the action of the shunt cover 8. During the upward process, the two-layer electromagnetic heating tube 4 passes through the inner cavity 41 and the outside of the tube, continues to be heated to a set temperature, and flows out from the upper part of the inner cavity 61 through the upper cover 31 of the housing through the heat transfer oil outlet 1.

[0021] It can be seen that during the entire heating process, the heat transfer oil has to repeatedly pass through a wave-shaped tortuous three-dimensional circulating flow path from bottom to bottom and top to bottom, and fully contacts the electromagnetic wave heating tube 4 for heat exchange, and the heating efficiency is high. , Energy saving.

[0022] When the present invention is used in a heat-conducting oil heating system, the required power can be determined according to the flow rate of the heat-conducting oil (kg/min) and the heating requirement (°C/min), thereby determining the specifications and quantity of the infrared electromagnetic heating tube, and heating During the working process of the heater, the operator in the operating room can monitor the heater's pressure and temperature in real time through the monitoring screen, and can adjust various parameters at any time to accurately control the heating temperature, control the power consumption, and ensure the heat transfer oil Heating demand. The operation practice shows that the heating system can be configured according to the actual application by using the electromagnetic waveguide hot oil heater. Compared with the traditional device with the same capacity, its scale is 5-6 times smaller than the original device, and the heating temperature can be controlled accurately to ±1 ℃, the degree of automation is high, which greatly reduces energy consumption and production costs of enterprises. Based on the current market price in Tianjin: coal 800 yuan/ton, diesel 7800 yuan/ton, industrial electricity 0.6 yuan/kWh, heating per ton of heat transfer oil from room temperature to 220°C consumes energy as follows: coal-fired heating 70-80 kg/ Tons, oil heating 12-13 kg/ton, electric heating 40-50Kw/ton; converted into RMB: coal heating 56-64 yuan/ton, oil heating 93.6-101.4 yuan/ton, electric heating 24-30 yuan/ton .

[0023] At present, the conditions for industrialization of this technology are mature. If it can be promoted in the asphalt industry and even more heating fields, it will bring huge economic and social benefits.