Tubular reactor
By designing a tubular reactor and employing multi-stage reaction tubes and independent heat transfer fluid pathways, the problems of insufficient heat transfer efficiency and reaction rate were solved, enabling precise control of the reaction temperature and improving the reaction conversion rate and product purity.
Patent Information
- Application Number
- CN202520069931.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-01-13
AI Technical Summary
Existing fixed-bed catalytic reactors have shortcomings in terms of heat transfer efficiency and reaction rate, making it difficult to achieve precise control of reaction temperature, which affects reaction conversion and selectivity.
A tubular reactor was designed, comprising an upper tube box, a lower tube box, and multi-stage reaction tubes. Each stage of the reaction tube consists of a tube cylinder and a parallel reaction tube bundle. It is equipped with independent sealed heat transfer fluid passages and reaction passages. The reaction temperature is precisely controlled by controlling the feed temperature, coolant temperature, and flow rate.
It improves reaction rate and heat transfer efficiency, increases production capacity per unit volume, improves reactant conversion rate and product purity, and achieves precise temperature control of the reaction process.
Smart Images
Figure CN223717085U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a reactor in general, especially to a catalytic reactor. BACKGROUND
[0002] Fixed bed catalytic reactor is a reaction equipment which is widely used in chemical industry and petrochemical industry, and can be divided into adiabatic and non-adiabatic (tube type) according to its heat exchange mode. For the reaction with great reaction heat effect, yield sensitive to temperature and high conversion rate and selectivity, in order to maintain the appropriate temperature, the heat exchange medium must be used to remove or supply heat. However, the existing reactor needs to be improved in heat transfer efficiency and reaction rate. SUMMARY
[0003] The utility model discloses a tubular reactor which can at least realize the accurate control of the temperature in the reaction process.
[0004] The tubular reactor provided by the utility model comprises:
[0005] An upper tube box has a reaction passage inlet;
[0006] A lower tube box has a reaction passage outlet; and
[0007] An upper reaction tube, an intermediate reaction tube and a lower reaction tube, wherein the upper reaction tube and the upper tube box are detachably fixed together, the lower reaction tube and the lower tube box are detachably fixed together, and the upper reaction tube and the lower reaction tube are detachably fixed together through the intermediate reaction tube, each reaction tube is composed of a tube cylinder and a parallel reaction tube bundle located in the tube cylinder, wherein the upper tube box, the reaction tube bundle of the upper reaction tube, the reaction tube bundle of the intermediate reaction tube, the reaction tube bundle of the lower reaction tube and the lower tube box jointly form a sealed reaction passage, and the tube cylinder of each reaction tube independently forms a sealed heat transfer fluid passage with an upper inlet and a lower outlet.
[0008] According to one preferred embodiment of the tubular reactor of the utility model, a reaction catalyst can be arranged in the reaction tube bundle of each reaction tube.
[0009] According to another preferred embodiment of the tubular reactor of the utility model, a filter screen can be arranged at both ends of the reaction tube bundle of each reaction tube.
[0010] According to still another preferred embodiment of the tubular reactor of the utility model, a cavity part for forming the sealed reaction passage can be formed at the upper end of each reaction tube, and an independent observation window and / or a pressure gauge can be arranged in the cavity part.
[0011] According to another preferred embodiment of the tubular reactor of the present application, each stage of reaction tubes can be provided with a perforated plate to allow the reaction tube bundle to pass through while being sealed to achieve the mutual isolation of the sealed reaction passage and the sealed heat transfer fluid passage.
[0012] According to the tubular reactor of the present application, the reactants flow from top to bottom with back mixing, thus achieving high production capacity per unit volume. In addition, since the reactants react in multiple elongated tubes, a greater contact area can be obtained, i.e. a larger surface area and high heat transfer efficiency, thus significantly improving the reaction rate and heat transfer efficiency. This has an important influence on the conversion rate of the reactants and the purity of the product. Furthermore, during the flow of the reactants in the tubes, precise control of the reaction process temperature can be achieved by controlling the temperature, coolant temperature and flow rate of the feed. This temperature control performance helps to maintain the selectivity of the reactants and the quality of the product. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 is a specific structure diagram of the reaction tube of the tube bundle reactor of the present application.
[0014] Figure 2 is a specific structure diagram of the reaction tube of the tube bundle reactor of the present application. DETAILED DESCRIPTION
[0015] The present application will be further described below with reference to the accompanying drawings.
[0016] Figure 2 is a specific structure diagram of the reaction tube of the tube bundle reactor of the present application. Figure 2 As shown in the drawings, the tubular reactor of the present application generally comprises a lower tube box 1, a plurality of (three in the drawings) reaction tubes 2 and an upper tube box 3. The lower tube box 1 forms a reaction passage outlet at the bottom, and the upper tube box 3 forms a reaction passage inlet at the top. The reactants enter from the reaction passage inlet of the upper tube box 3, pass through the tube bundle of each stage of reaction tubes from top to bottom to react, and finally flow out from the reaction passage outlet of the lower tube box 1.
[0017] The upper stage reaction tube and the upper tube box 3 are detachably fixed together by a connecting flange, for example, the connecting flange 2-8 shown in the drawings. Figure 1 The lower stage reaction tube and the lower tube box 1 are detachably fixed together by a connecting flange, for example, the connecting flange 2-2 shown in the drawings. Figure 1 The upper stage reaction tube 2, the lower stage reaction tube and the intermediate reaction tube are also detachably fixed together by the corresponding connecting flanges.
[0018] Figure 1 shows an enlarged structure of one of the reaction tubes 2. As shown in the drawings, Figure 1As shown, the reaction tube 2 comprises a tube cylinder 2-3 and a parallel reaction column tube bundle 2-10 located therein. The tube cylinder 2-3 of the reaction tube 2 independently forms a sealed heat transfer fluid passage with an upper inlet 2-12 and a lower outlet 2-13. With such independently formed heat transfer fluid passages, different temperature and pressure materials can be used to control the state of the reaction product, thereby achieving precise control of the reaction product.
[0019] Referring to Figure 2 The upper tube box 3, the reaction column tube bundle of the upper stage reaction tube, the reaction column tube bundle of the intermediate reaction tube, the reaction column tube bundle of the lower stage reaction tube and the lower tube box 1 jointly form a sealed reaction passage. In addition, as shown Figure 1 As shown, the upper end of the reaction tube 2 is formed with a cavity part for forming a sealed reaction passage, and an independent observation window 2-7 and a pressure gauge 2-9 are arranged therein to facilitate timely inspection and observation of the state of the reactant; according to the observation result, the temperature and / or pressure of the heat carrier in the next stage column tube bundle can be adjusted, and different circulation modes can be adopted, so as to regulate the reaction state in the tube, thereby accurately controlling the final product.
[0020] The reaction column tube bundle 2-10 of the reaction tube 2 is provided with a reaction catalyst. The reaction column tube bundle 2-10 of the reaction tube 2 is provided with a filter screen 2-11 at both ends.
[0021] The reaction tube 2 is provided with a lower perforated plate 2-1 and an upper perforated plate 2-6 through which the reaction column tube bundle 2-10 is sealed to realize the mutual isolation of the sealed reaction passage and the sealed heat transfer fluid passage.
[0022] The outer side of the tube cylinder 2-3 of the reaction tube 2 is further provided with an ear seat 2-4 and a lifting lug 2-5 to facilitate installation or maintenance operation and the like.
[0023] The tubular reactor of the utility model has large heat exchange area corresponding to unit volume of catalyst, and is suitable for strong exothermic reaction, has high pressure bearing capacity and high reaction efficiency.
[0024] In addition, the structure of the utility model has mature manufacturing process, is convenient to maintain, can be repaired or plugged for the leakage of the reaction tube welding joint, the catalyst loading and unloading process is simple, the wearing parts are convenient to replace, and therefore the utility model is widely applied. Compared with the traditional reaction kettle, the tubular reactor of the utility model has stronger pressure bearing capacity, has no stirring shaft, can complete the stirring work through the structural advantages, not only reduces the cost, but also improves the mixing rate and the reaction rate.
Claims
1. A tubular reactor, characterized in that, include: The upper tube box has a reaction passage inlet; The lower tube box has a reaction passage outlet; The system comprises an upper-stage reaction tube, an intermediate-stage reaction tube, and a lower-stage reaction tube. The upper-stage reaction tube is detachably fixed to the upper tube box, and the lower-stage reaction tube is detachably fixed to the lower tube box. The upper-stage and lower-stage reaction tubes are detachably fixed together via the intermediate-stage reaction tube. Each stage of the reaction tube consists of a tube shell and a parallel reaction tube bundle located within the tube shell. The upper tube box, the reaction tube bundles of the upper-stage reaction tube, the reaction tube bundles of the intermediate-stage reaction tube, the reaction tube bundles of the lower-stage reaction tube, and the lower tube box together form a sealed reaction passage. The tube shell of each stage of the reaction tube independently forms a sealed heat transfer fluid passage with an upper inlet and a lower outlet.
2. The tubular reactor according to claim 1, characterized in that, Each stage of the reaction tube bundle contains a reaction catalyst.
3. The tubular reactor according to claim 1, characterized in that, Each stage of the reaction tube bundle is equipped with a filter screen at both ends.
4. The tubular reactor according to claim 1, characterized in that, Each stage of the reaction tube has a cavity at its upper end to form a sealed reaction passage, where an independent observation window and / or pressure gauge are installed.
5. The tubular reactor according to claim 1, characterized in that, Each stage of the reaction tube is equipped with an orifice plate through which the reaction tube bundle passes in a sealed manner, thereby achieving mutual isolation between the sealed reaction passage and the sealed heat transfer fluid passage.