Special device for preparing high-temperature heat-conducting oil by synthesizing alkylbenzene

Abstract

The utility model discloses a special device for preparing high-temperature heat-conducting oil by synthesizing alkylbenzene, which comprises an alkylation reaction structure, in a reaction tank, a spring rod is connected with a floating plate, a pressure release valve is arranged on the floating plate, the lower part of the floating plate is connected with a catalyst box, an acid catalyst is stored in the catalyst box, and a stirring rod is also arranged below the floating plate. Steam heats the raw materials to a reaction temperature, the pressure release valve is opened to discharge an alkylation mixture when the raw materials are increased, the floating plate rises and the pressure reaches a threshold value, the floating plate descends under the action of the spring rod after pressure release, and in the up-down moving process of the floating plate, liquid raw materials impact to enable a catalyst to be in full contact with the raw materials, so that blockage is avoided; meanwhile, the blades at the lower end of the stirring rod are impacted to passively rotate to stir the raw materials and promote the reaction, so that the use efficiency of a catalyst is improved, the use of extra power equipment is reduced, the energy consumption is reduced, and the quality and yield of high-temperature heat-conducting oil prepared by synthesizing alkylbenzene are favorably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to high temperature heat conducting oil preparation technical field, concretely is a kind of special device of synthetic alkylbenzene preparation high temperature heat conducting oil. BACKGROUND

[0002] In the process of the vigorous development of modern industry, the dependence of many industries such as petroleum chemical industry, fine chemical industry and plastic processing on high temperature process is deepening, and the equipment such as reaction kettle and heating furnace needs efficient and reliable heat transfer medium when operating at high temperature. However, the traditional heat conducting medium, such as mineral oil based heat conducting oil, has poor thermal stability at high temperature, is easy to volatilize and burn, has greater environmental pollution risk, and is difficult to meet the trend of increasing industrial production scale and improving environmental safety requirements. At the same time, the continuous innovation of organic synthesis technology makes it possible to efficiently and large-scalely prepare synthetic alkylbenzene, and its high selectivity synthesis is also possible. Advanced analysis and detection technology helps to accurately control the performance of synthetic alkylbenzene and its prepared high temperature heat conducting oil. Based on this, synthetic alkylbenzene has become an ideal raw material for preparing high temperature heat conducting oil due to its significant advantages in thermal stability and environmental protection, which provides key support for meeting the needs of modern industrial high temperature process.

[0003] In the process of preparing high temperature heat conducting oil from synthetic alkylbenzene, benzene and ethylene are usually used as reaction raw materials in the alkylation reaction stage, and suitable catalysts such as acidic molecular sieve catalysts are selected. Benzene and ethylene are introduced into the reaction kettle with stirring and temperature control device in a certain proportion, and alkylation reaction is carried out under certain temperature and pressure conditions. However, in the alkylation reaction process, the activity of the acidic molecular sieve catalyst may be reduced and the selectivity may be poor due to carbon deposition and impurity adsorption, which affects the conversion rate of the reaction and the yield of triethylbenzene. Therefore, the catalyst needs to be regenerated or replaced regularly, which increases the production cost and operation complexity.

[0004] Therefore, the utility model provides a special device for preparing high temperature heat conducting oil from synthetic alkylbenzene to solve the above problems. UTILITY MODEL CONTENTS

[0005] In view of the shortcomings of the prior art, the utility model provides a special device for preparing high temperature heat conducting oil from synthetic alkylbenzene, which solves the above problems.

[0006] In order to achieve the above object, the utility model discloses a special device of synthetic alkylbenzene preparation high temperature heat conducting oil through the following technical schemes, a kind of alkylation reaction structure, the alkylation reaction structure includes reaction tank, the upper position of the inside of reaction tank is along the axis and is provided with several strip grooves that open to the reaction space inside reaction tank, and the inside of strip groove is slidably inserted with spring rod, the lower end of spring rod is fixed on the upper surface of the lateral slide block of floating plate, the upper surface of floating plate is provided with several pressure relief valves along the axis annular array, the lower surface of floating plate is integrally provided with several connecting rods, and cooperate connecting rod and be fixed with catalyst tank in the directly below, the inside of catalyst tank is stored with acidic catalyst, the axis position of the lower surface of floating plate is integrally provided with stirring rod.

[0007] Preferably, the reaction tank is provided as a double-layer nested structure, and a cavity with a specified spacing is provided between the inner and outer layers, and the upper side of the outer surface of the reaction tank is symmetrically provided with a steam heating interface communicated with the cavity along the axis.

[0008] Preferably, the upper side of the outer surface of the reaction tank is provided with an output interface communicated with the internal reaction space of the reaction tank, and the central positions of the upper and lower surfaces of the reaction tank are respectively provided with a detection port and a blowdown port communicated with the internal reaction space of the reaction tank, wherein a blowdown valve is arranged on the pipe diameter of the blowdown port, and the lower side of the side surface of the reaction tank is integrally provided with a raw material input interface communicated with the internal reaction space of the reaction tank, and the surface of the raw material input interface has a plurality of independent interfaces.

[0009] Preferably, the spring rod is composed of a plug rod and a spring sleeved on the plug rod, wherein a plug hole corresponding to the strip groove is formed in the upper wall of the reaction tank, the upper end of the spring is fixed to the upper wall of the strip groove, and the lower end of the spring is fixed to the upper surface of the lateral slide block of the floating plate.

[0010] Preferably, the slide block integrally provided on the lateral side of the floating plate corresponding to the spring rod has the same cross section as the strip groove, and is sealed slidingly in the strip groove.

[0011] Preferably, the input end of the pressure relief valve is communicated with the space isolated from the inside of the reaction tank below the floating plate.

[0012] Preferably, the rod body of the stirring rod extends downward through the catalyst tank to the lower side of the reaction tank, and the stirring wheel at the lower end of the stirring rod is in a rotating connection relationship with the rod body.

[0013] Beneficial effects

[0014] The utility model provides a special device of synthetic alkylbenzene preparation high temperature heat conducting oil. Compared with the prior art, the following beneficial effects are achieved:

[0015] The special device for preparing high-temperature heat-conducting oil from synthetic alkylbenzene is characterized in that the linkage structure of the float plate, the pressure relief valve, the spring rod and the catalyst box is arranged, so that the strong impact of the liquid raw material can ensure that the acidic catalyst and the raw material are always in good contact during the reaction process, and the blockage is avoided, compared with the traditional device, the activity of the catalyst is reduced due to carbon deposition and impurity adsorption, and the use efficiency of the catalyst is greatly improved, and the conversion rate of the alkylation reaction and the yield of triethylbenzene are improved, the production cost increase and the operation complexity caused by the catalyst problem are effectively reduced, and in the up-down movement of the float plate, the stirring wheel at the lower end of the stirring rod is passively rotated under the impact of the liquid raw material, and the stirring effect on the raw material is achieved, which is different from the traditional active stirring mode, the use of the additional power equipment is avoided, the equipment cost and the energy consumption are reduced, and in addition, the stirring is realized by using the natural flow of the liquid raw material in the reaction process, the mixing of the raw material and the catalyst is more sufficient, the alkylation reaction is further promoted, and the quality and the yield of the synthetic alkylbenzene for preparing high-temperature heat-conducting oil are improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is a three-dimensional structure of the utility model;

[0017] Fig. 2 is a structure section view of the utility model;

[0018] Fig. 3 is an internal structure schematic view of the utility model.

[0019] In the drawing: 1, alkylation reaction structure; 11, reaction tank; 111, raw material input interface; 112, output interface; 113, steam heating interface; 114, detection port; 115, blowdown port; 12, float plate; 121, pressure relief valve; 122, spring rod; 123, connecting rod; 13, catalyst box; 131, acidic catalyst; 14, stirring rod. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0021] Please refer to Figs. 1-3The utility model provides a special device of synthetic alkyl benzene preparation high temperature heat conducting oil, including alkylating reaction structure 1, alkylating reaction structure 1 includes reaction kettle 11, reaction kettle 11 is arranged as double -deck nested structure, and is arranged with the cavity of specified interval between inside and outside layers, and the upper side of reaction kettle 11 outer surface is along the axial symmetry and is provided with the steam heating interface 113 that communicates with the cavity, and the upper side of reaction kettle 11 outer surface is provided with the output interface 112 that communicates with the inside reaction space of reaction kettle 11, the central position of reaction kettle 11 upper and lower surfaces is provided with the detection port 114 and the blowdown port 115 that communicate with the inside reaction space of reaction kettle 11 respectively, wherein, the pipe diameter of blowdown port 115 is configured with blowdown valve, and the lower side of reaction kettle 11 side is integrally provided with the raw material input interface 111 that communicates with the inside reaction space of reaction kettle 11, and the surface of raw material input interface 111 has multiple independent interfaces of output, the upper position of reaction kettle 11 inside is along the axle and is provided with a plurality of strip grooves that open to the inside reaction space of reaction kettle 11, and spring rod 122 is slidably arranged in the inside of strip groove, and spring rod 122 is composed of plug and spring that is sleeved on plug, wherein, the inside of reaction kettle 11 is provided with the sliding insertion plug hole on the upper wall of strip groove, the upper end of spring is fixed with the upper wall of strip groove, and the lower end of spring is fixed on the upper surface of the sliding block of the peripheral side of floating plate 12, the sliding block that the peripheral side of floating plate 12 is integrally provided with corresponds spring rod 122 and is same with the cross section of strip groove, and is sealed sliding in the inside of strip groove, the upper surface of floating plate 12 is provided with a plurality of pressure relief valves 121 along the axle and annular array, and the input end of pressure relief valve 121 communicates with the space isolated below floating plate 12 in the inside of reaction kettle 11, the lower surface of floating plate 12 is integrally provided with a plurality of connecting rods 123, and is fixed with catalyst tank 13 in the just below with cooperation connecting rod 123, the surface of catalyst tank 13 is evenly provided with through hole, and the inside of catalyst tank 13 stores acidic catalyst 131, the axial position of the lower surface of floating plate 12 is integrally provided with stirring rod 14, and the rod body of stirring rod 14 extends downward through catalyst tank 13 to the below of reaction kettle 11, and the stirring wheel and the rod body between the lower end of stirring rod 14 are rotationally connected.

[0022] When working, raw materials such as benzene and ethylene are continuously input into the reaction tank 11 in proportion from the raw material input interface 111, and steam enters the double-layer cavity of the reaction tank 11 through the steam heating interface 113 to heat the raw materials to the required temperature for alkylation reaction. As the raw materials are injected, the increase in the amount of raw materials in the tank pushes the floating plate 12 to rise. When the floating plate 12 reaches the top end, the pressure in the tank increases as the raw materials continue to be input. When the preset condition of the pressure relief valve 121 is reached, the valve opens to release the alkylation mixture to relieve the pressure. The mixture is discharged through the output interface 112. After pressure relief, the floating plate 12 rapidly descends under the elastic force of the spring rod 122. Since the catalyst tank 13 is connected to the floating plate 12, the two move synchronously, causing the liquid raw materials to impact, allowing the acidic catalyst 131 to maintain good contact with the raw materials and avoid clogging, ensuring efficient reaction. At the same time, the lower end of the stirring rod 14 is passively rotated by the impact of the liquid raw materials, stirring the raw materials and promoting the mixing of the raw materials and the catalyst, thereby improving the reaction rate.

[0023] In summary, by setting the linkage structure of the floating plate 12, the pressure relief valve 121, the spring rod 122, and the catalyst tank 13, the strong impact of the liquid raw materials caused by the up-and-down movement of the floating plate 12 ensures that the acidic catalyst 131 maintains good contact with the raw materials at all times, avoiding clogging. This greatly improves the efficiency of the catalyst compared to the traditional device where the catalyst is easily deactivated due to carbon deposition and impurity adsorption, thereby improving the conversion rate of the alkylation reaction and the yield of triethylbenzene, effectively reducing the increase in production cost and operational complexity caused by catalyst problems. At the same time, the stirring wheel at the lower end of the stirring rod 14 is passively rotated by the impact of the liquid raw materials during the up-and-down movement of the floating plate 12, which plays a stirring role on the raw materials. This design differs from the traditional active stirring method, avoiding the use of additional power equipment, reducing equipment costs and energy consumption. In addition, using the natural flow of the liquid raw materials during the reaction to achieve stirring allows the raw materials and catalyst to mix more thoroughly, further promoting efficient alkylation reaction, which helps to improve the quality and yield of synthetic alkylbenzene for preparing high-temperature heat-conducting oil.

[0024] Meanwhile, the contents not described in detail in this specification are all existing technologies known to those skilled in the art.

[0025] Working principle: when working, first, through the multiple independent interfaces of the raw material input interface 111, the raw materials such as benzene and ethylene are continuously and stably input into the reaction tank 11 in proportion, the steam enters the cavity between the inner and outer layers of the reaction tank 11 from the steam heating interface 113, the raw materials in the reaction tank 11 are heated to reach the required temperature of the alkylation reaction, and as the raw materials are continuously injected, the raw materials in the tank will quickly increase and spread upwards, then the raw materials will push the floating plate 12 to move upwards, when the floating plate 12 moves to the topmost position, the pressure in the tank will increase as the raw materials continue to be input, when the hydraulic pressure reaches the preset pressure relief condition of the pressure relief valve 121, the pressure relief valve 121 is opened, and part of the pressure is released by releasing the alkylation mixture generated after contacting the acidic catalyst 131 upwards, and the discharged alkylation mixture can be output through the output interface 112, after pressure relief, the floating plate 12 will quickly move downwards under the elastic force of the spring rod 122, since the catalyst tank 13 is connected with the floating plate 12 through the connecting rod 123, it will move up and down synchronously with the floating plate 12, in the process of the floating plate 12 moving up and down, the liquid raw materials will produce strong up and down impact, this impact effect can ensure that the acidic catalyst 131 in the catalyst tank 13 and the raw materials always maintain good contact state, avoid the occurrence of blockage, and ensure the efficient reaction, at the same time, the blades at the lower end of the stirring rod 14 will be passively rotated under the impact of the liquid raw materials, the rotation of the stirring rod 14 plays a stirring role on the raw materials, further promotes the full mixing of the raw materials and the catalyst, improves the reaction rate, makes the alkylation reaction more fully and efficiently, and further improves the quality and yield of the synthetic alkylbenzene prepared high-temperature heat conducting oil.

[0026] It should be noted that, in the present text, relational terms such as first and second and the like are used merely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover non-exclusive inclusions, so that a process, method, article, or apparatus that includes a list of elements does not only include those elements, but also includes other elements not explicitly listed, or inherent to such process, method, article, or apparatus.

[0027] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A dedicated apparatus for synthesizing alkylbenzenes to prepare high-temperature heat transfer oil, characterized in that: The alkylation reaction structure (1) includes a reaction vessel (11). Several strip-shaped channels opening into the reaction space inside the reaction vessel (11) are provided along the axis at the upper middle position inside the reaction vessel (11). Spring rods (122) are slidably inserted inside the strip-shaped channels. The lower end of the spring rods (122) is fixed to the upper surface of the slider on the periphery of the float plate (12). Several pressure relief valves (121) are arranged in a ring array along the axis on the upper surface of the float plate (12). Several connecting rods (123) are integrally provided on the lower surface of the float plate (12). The connecting rods (123) are fixed to the catalyst box (13) directly below. The catalyst box (13) stores an acidic catalyst (131) inside. A stirring rod (14) is integrally provided at the axial position of the lower surface of the float plate (12).

2. The specialized apparatus for synthesizing alkylbenzenes to prepare high-temperature heat transfer oil according to claim 1, characterized in that: The reaction vessel (11) is configured as a double-layer nested structure, and a cavity with a specified spacing is provided between the inner and outer layers. A steam heating interface (113) communicating with the cavity is symmetrically arranged along the axis on the upper middle side of the outer surface of the reaction vessel (11).

3. The specialized apparatus for synthesizing alkylbenzenes to prepare high-temperature heat transfer oil according to claim 1, characterized in that: An output interface (112) communicating with the internal reaction space of the reaction vessel (11) is provided on the upper side of the outer surface of the reaction vessel (11). A detection port (114) communicating with the internal reaction space of the reaction vessel (11) is provided at the center of the upper and lower surfaces of the reaction vessel (11), respectively. A drain valve is provided on the pipe diameter of the drain port (115). A raw material input interface (111) communicating with the internal reaction space of the reaction vessel (11) is integrally provided on the lower side of the side of the reaction vessel (11), and the surface of the raw material input interface (111) has multiple independent output interfaces.

4. The specialized apparatus for synthesizing alkylbenzenes to prepare high-temperature heat transfer oil according to claim 1, characterized in that: The spring rod (122) consists of a plug rod and a spring sleeved on the plug rod. The interior of the reaction vessel (11) has a corresponding sliding insertion hole on the upper wall of the strip channel. The upper end of the spring is fixed to the upper wall of the strip channel, and the lower end of the spring is fixed to the upper surface of the slider on the periphery of the float plate (12).

5. The specialized apparatus for synthesizing alkylbenzenes to prepare high-temperature heat transfer oil according to claim 1, characterized in that: The slider integrally formed with the spring rod (122) on the periphery of the float plate (12) has the same cross-section as the strip channel and slides in a sealed manner inside the strip channel.

6. The specialized apparatus for synthesizing alkylbenzenes to prepare high-temperature heat transfer oil according to claim 1, characterized in that: The input end of the pressure relief valve (121) is connected to the space inside the reaction vessel (11) that is isolated below the float plate (12).

7. The specialized apparatus for synthesizing alkylbenzenes to prepare high-temperature heat transfer oil according to claim 1, characterized in that: The stirring rod (14) extends downward through the catalyst box (13) to the lower part of the reaction vessel (11), and the stirring wheel at the lower end of the stirring rod (14) is rotatably connected to the rod.

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