Fixed heating jacket for product gas delivery pipe of methanol-to-olefin catalyst micro-reaction activity evaluation device

Abstract

The utility model discloses a fixed heating jacket for a product gas delivery pipe of a methanol-to-olefin catalyst micro-reaction activity evaluation device, and belongs to the technical field of methanol-to-olefin. The heating jacket is composed of a heating jacket body, a temperature controller and a temperature sensor, an annular insulation heat conduction plate, a heating belt, an annular heat insulation plate and an annular protection pad are sequentially arranged in the heating jacket body around a product gas conveying pipe from inside to outside, and the heating belt is of a strip structure and is arranged on the outer surface of the annular insulation heat conduction plate in a single-layer spiral winding mode; the zipper consistent with the product gas conveying pipe in direction is embedded in the outer surface of the heating jacket body, the temperature sensor is embedded in the inner side of the top end of the heating jacket body, and the temperature controller is installed on the outer side of the bottom end of the heating jacket body. The fixed heating sleeve device with the temperature controller is flexible and adjustable in temperature, easy to disassemble and replace and high in operability; local hot spots can be effectively avoided, and uniform heating of the product gas conveying pipe is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to methanol to olefins technical field, concretely relates to a kind of fixed heating jacket of product gas conveying pipe for methanol to olefins catalyst micro-reaction activity evaluation device. BACKGROUND

[0002] Methanol to olefins catalyst micro-reaction activity evaluation device is the key experimental device for evaluating catalyst activity, after methanol enters fixed fluidized bed reactor and reacts with catalyst, the product gas generated is analyzed by gas chromatography through pipeline, the outlet of fixed fluidized bed reactor is connected with gas chromatograph instrument through φ3 stainless steel pipe, the outer wall of φ3 stainless steel pipe is wrapped with heating tape, and then wrapped with aluminum foil for heat preservation. In the process of running reaction test, it is found that the heat preservation mode of heating tape wrapped with aluminum foil through winding φ3 stainless steel pipe can easily cause uneven heating of product gas conveying pipe, local hot spot is generated, the product gas component distribution entering gas chromatograph is affected, and inaccurate measurement results are caused. At the same time, conventional industrial heating jacket cannot be applied to φ3 stainless steel pipe, and the heating tape wrapped with aluminum foil often breaks down in the later stage of use, and the aluminum foil paper needs to be replaced frequently. In order to solve the problems of uneven heating of product gas conveying pipe, heating tape and frequent replacement of aluminum foil paper, a fixed heating jacket for product gas conveying pipe of methanol to olefins catalyst micro-reaction activity evaluation device is proposed. SUMMARY

[0003] The utility model discloses a kind of fixed heating jackets for product gas conveying pipe of methanol to olefins catalyst micro-reaction activity evaluation device, which is important heat preservation device of product gas conveying pipe, and is important component of micro-reaction activity evaluation device, methanol to olefins catalyst micro-reaction activity evaluation device is composed of methanol conveying system, reaction system, product gas conveying and analysis system. Methanol conveying system is composed of methanol / water raw material tank, plunger pump and methanol vaporization chamber, reaction system is composed of fixed fluidized bed temperature control device and reaction furnace, product gas conveying and analysis system is composed of product gas conveying pipe and gas chromatograph analyzer. The fixed heating jacket of the utility model is arranged on the outside of product gas conveying pipe, which effectively solves the problems of uneven heating of product gas conveying pipe in product gas conveying and analysis system, easy breakage of electric heating wire in heating tape and frequent replacement of aluminum foil paper of heating tape, and is conducive to online collection and analysis of subsequent product gas.

[0004] The utility model discloses a kind of for methanol to olefin catalyst micro-reaction activity evaluation device product gas conveying pipe's fixed heating jacket, heating jacket body 2, temperature controller 5 and temperature sensor 7 are formed, heating jacket body 2 is by annular heat preservation material with certain thickness Composition, annular heat insulation plate 9, heating band 4, annular heat insulation plate 6 and annular protective pad 10 are sequentially arranged from inside to outside in the inside of heating jacket body 2 around product gas conveying pipe 1 (for φ3 stainless steel pipe), heating band 4 is strip structure, single-layer spiral winding is arranged on the outer surface of annular heat insulation plate 9, (there is no gap between adjacent heating band 4, so as to ensure that heating jacket is heated evenly, heating band is left with gap in the diagram to intuitively show the winding mode of heating band);Zipper 8 identical with the direction of product gas conveying pipe 1 is embedded and installed on the outer surface of heating jacket body 2, opening identical with the direction of zipper 8 is formed on annular heat insulation plate 9, annular heat insulation plate 6 and annular protective pad 10, so as to facilitate the replacement of product gas conveying pipe 1.Temperature sensor 7 is embedded and installed in the inside of the top end of heating jacket body 2 (close to product gas inlet), temperature controller 5 is installed on the outside of the bottom end of heating jacket body 2, temperature controller 5 is integrated with temperature control and temperature display, heating band 4, temperature sensor 7 and temperature controller 5 are connected, and temperature controller 5 is electrically connected with external power supply through power on / off.

[0005] Further, the surface of the heating jacket body 2 is fixedly provided with a P-shaped clamp 3, the P-shaped clamp 3 is made of stainless steel, and the number is 2-4.

[0006] Further, the model of the temperature controller 5 is MTC-5060C.

[0007] Specifically, the length of the heating jacket body 2 is 95 cm, the thickness of the heating jacket body is 0.5 mm, and the outer diameter of the heating jacket body is 24 mm; the length of the product gas conveying pipe 1 is 90 cm, and the outer diameter is 4 mm; the thicknesses of the annular heat insulation plate 9, the annular heat insulation plate 6 and the annular protective pad 10 are 1.5 mm, 5 mm and 2 mm respectively. The lengths of the annular heat insulation plate 9, the annular heat insulation plate 6 and the annular protective pad 10 are all 95 cm; the thickness of the heating band 4 is 1 mm, the length is 150 cm, and the width of the heating band is 3 cm.

[0008] Specifically, the temperature controller 5 adjusts the internal temperature of the heating jacket body 2 to 150-200°C through the heating band 4.

[0009] Specifically, the material of the heating jacket body 2 can be thermal insulation materials such as silica cloth, rock wool, aluminum silicate, glass wool and aerogel, the heating band 4 is mainly composed of electric heating material and insulating material, the electric heating material is a nickel-chromium alloy band, has the characteristics of fast heating, high thermal efficiency and long service life, the insulating material is a plurality of layers of alkali-free glass fiber, has good temperature resistance and reliable insulation performance, the heating band 4 involved in the utility model can be directly purchased in Zibo Yunjing Electrical Technology Co., Ltd.

[0010] The material of the heat insulation plate 6 is polyurethane, the material of the insulating heat conduction plate 9 is silica gel, and the material of the protective pad 10 is high-temperature-resistant non-asbestos.

[0011] Compared with the prior art, the utility model has the advantages as follows:

[0012] (1) The product gas conveying pipe is wrapped with the fixed heating jacket device, the heating band 4 is fixed in the inside of the heating jacket, and the stainless steel pipe of φ3 does not need to be wound, so that local hot spots are avoided, and the product gas conveying pipe is uniformly heated;

[0013] (2) The fixed heating jacket device is provided with a temperature controller, the temperature is flexible and adjustable, and the temperature controller is easy to disassemble and replace, has strong operability, the temperature detected by the temperature sensor is displayed in real time through the display screen, and the internal temperature of the heating jacket is conveniently understood and recorded by an operator;

[0014] (3) The traditional industrial heating jacket cannot match the size of the stainless steel pipe of φ3, and can be widely applied in a laboratory range. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Figure 1 It is a schematic view of a methanol-to-olefin catalyst micro-reaction activity evaluation device;

[0017] Figure 2 It is a schematic view of a sectional view of the structure of the utility model;

[0018] Figure 3 It is a local enlarged view of the utility model.

[0019] The names of the parts are: product gas conveying pipe 1, heating sleeve body 2, P-shaped clamp 3, heating belt 4, temperature controller 5, heat insulation plate 6, temperature sensor 7, zipper 8, insulating heat-conducting plate 9, protective pad 10.

[0020] The function of the product gas conveying pipe 1 is to transport product gas into the chromatograph; the function of the heating sleeve body 2 is to keep the product gas warm and prevent condensation caused by too low temperature from entering the chromatograph, resulting in inaccurate analysis results; the function of the P-shaped clamp 3 is to prevent the heating sleeve body 2 from moving and fix it around the product gas conveying pipe 1; the function of the heating belt 4 is to heat the heating sleeve body 2; the function of the temperature controller 5 is to control the temperature fluctuation of the heating belt 4, which can set the temperature within the heating range and display the corresponding temperature; the function of the heat insulation plate 6 is to prevent the heating belt 4 from being damaged due to too high temperature; the function of the temperature sensor 7 is to monitor the temperature of the heating belt 4 controlled by the temperature controller 5 and convert it into an output signal; the function of the zipper 8 is to facilitate the installation and removal of the product gas conveying pipe 1; the function of the insulating heat-conducting plate 9 is to help the heat distribution of the heating sleeve body 2 to be uniform, prevent local overheating, and protect the heating sleeve body 2 from being damaged by heat; the protective pad 10 is set to protect the inside of the heating sleeve body 2. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] Embodiment 1

[0023] As shown in figure 1, a fixed heating jacket of a methanol to olefin catalyst micro-reactor activity evaluation device includes a product gas delivery pipe 1, the outside of which is provided with a heating jacket body 2 of annular structure and silica cloth material, the length of the heating jacket body 2 is 95 cm, the outer diameter is 24 mm, and the inner diameter is 4 mm. The outside of the heating jacket body 2 is fixed with a P-shaped clamp 3, which is fixedly arranged at the top end, the middle end and the end of the fixed heating jacket body 2. A zipper 8 is arranged on the heating jacket body 2 in the same direction as the product gas delivery pipe 1, and openings are formed in the annular insulating heat-conducting plate 9, the annular heat-insulating plate 6 and the annular protective pad 10 in the same direction as the zipper 8, so that the product gas delivery pipe 1 can be replaced conveniently. A temperature sensor 7 connected with a heating belt 4 is embedded in the inside of the top end of the heating jacket body 2 (close to the product gas inlet), and a temperature controller 5 is arranged on the outside of the bottom end of the heating jacket body 2, the temperature controller 5 is an intelligent instrument integrating temperature control and temperature display, and the heating belt 4, the temperature sensor 7 and the temperature controller 5 are connected. The heating belt 4 forms a uniform heat-conducting layer in the inside of the fixed heating jacket 2, the model of the temperature controller 5 is MTC-5060C, and the model of the temperature sensor 7 is WRNK-161. The fixed heating jacket controls the temperature in the inside of the heating jacket in the range of 150-200 DEG C through the cooperation of the heating belt 4 and the temperature controller 5, and displays the specific value on the temperature controller 5, so that the quality of the product gas is not affected by excessively high or low temperature.

[0024] When the methanol to olefin catalyst evaluation reaction is carried out, there are three stages of catalyst activation, formal reaction and product gas analysis, nitrogen is introduced in the catalyst activation stage; meanwhile, in the formal reaction stage, the methanol solution in the methanol / water raw material tank enters a methanol vaporization chamber (the temperature of the methanol vaporization chamber is 300 DEG C) through a plunger pump, the liquid-phase methanol is converted into gas-phase in the methanol vaporization chamber, the gas-phase methanol heated and vaporized by the methanol vaporization chamber enters a reaction furnace, the reaction furnace is filled with a methanol to olefin reaction catalyst, the gas-phase methanol enters the reaction furnace to generate product gas under the action of the catalyst, and the product gas generated in the reaction furnace is sent to a gas chromatograph through a product gas delivery pipe after the oil wax substances in the product gas are intercepted by a filter. The product gas delivery pipe is a φ3 stainless steel pipe, the outer wall of the product gas delivery pipe is wrapped with the heating jacket body 2 provided with the heating belt 4, so that the product gas does not condense in the flowing process.

[0025] The above-mentioned only is the preferred embodiment of the present application, and does not limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A fixed heating jacket for a product gas transfer line of a methanol to olefins catalyst microactivity test unit, characterized by: The utility model relates to a heating sleeve body (2), temperature controller (5) and temperature sensor (7) are composed, heating sleeve body (2) is by annular heat preservation material with certain thickness, annular insulating heat conduction plate (9), heating band (4), annular heat insulation plate (6) and annular protective pad (10) are sequentially arranged from inside to outside in the inside of heating sleeve body (2) around product gas conveying pipe (1), heating band (4) is the strip structure, and single layer spiral winding is arranged on the outer surface of annular insulating heat conduction plate (9), zipper (8) consistent with the direction of product gas conveying pipe (1) is embedded and installed on the outer surface of heating sleeve body (2), and the opening consistent with the direction of zipper (8) is opened on annular insulating heat conduction plate (9), annular heat insulation plate (6) and annular protective pad (10), temperature sensor (7) is embedded and installed in the inside of the top end of heating sleeve body (2), temperature controller (5) is installed on the outside of the bottom end of heating sleeve body (2), and heating band (4), temperature sensor (7) and temperature controller (5) are connected, and temperature controller (5) is electrically connected with external power supply through power switch.

2. A fixed heating jacket for product gas delivery pipe of a micro-activity evaluation device for methanol to olefins catalyst according to claim 1, characterized in that: P-shaped clamps (3) are fixedly arranged on the surface of the heating sleeve body (2), the P-shaped clamps (3) are made of stainless steel, and the number of the P-shaped clamps (3) is 2 to 4.

3. A fixed heating jacket for product gas delivery line of a micro-activity evaluation apparatus for a methanol to olefins catalyst according to claim 1, characterized in that: The temperature controller (5) adjusts the internal temperature of the heating sleeve body (2) to be 150 to 200 DEG C through the heating band (4).

4. A fixed heating jacket for product gas delivery line of a micro-activity evaluation apparatus for a methanol to olefins catalyst according to claim 1, characterized in that: The material of the heating sleeve body (2) is one of silica cloth, rock wool, aluminum silicate, glass wool or aerogel, the material of the heat insulation plate (6) is polyurethane, the material of the insulating heat conduction plate (9) is silica gel, and the material of the protective pad (10) is high-temperature-resistant non-asbestos.

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