CN211936852U - Chemical production equipment - Google Patents
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- CN211936852U CN211936852U CN202020404589.2U CN202020404589U CN211936852U CN 211936852 U CN211936852 U CN 211936852U CN 202020404589 U CN202020404589 U CN 202020404589U CN 211936852 U CN211936852 U CN 211936852U
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Abstract
The utility model discloses a chemical production device, which comprises a fixed bed reaction device and a dehydration device, wherein the fixed bed reaction device and the dehydration device are connected through a conduit; the fixed bed reaction device comprises at least two input pipelines, a reaction furnace, a first condenser and a collector, wherein the input pipelines are connected with an inlet of the reaction furnace, an outlet of the reaction furnace is connected with the collector through the first condenser, and an outlet of the collector is connected with an inlet of the dehydration device; the outlet of the fixed bed reaction device is connected with a raw material tank, the raw material tank is connected with a membrane module through an inlet pipe and an outlet pipe, the raw material tank and the membrane module are arranged in the heating cavity, the membrane module is of a cylindrical structure with a pervaporation membrane arranged inside, and the membrane module is connected with a vacuum module and a second condenser; the utility model discloses a pervaporation membrane carries out going on of dehydration technology, can realize going on from the reaction process to the continuation of dehydration process, very big improvement chemical production efficiency, avoid pollution or loss in the raw materials transfer process simultaneously.
Description
Technical Field
The utility model relates to a chemical production technical field, concretely relates to chemical production equipment.
Background
Fixed beds, also known as packed bed reactors, are reactors packed with solid catalysts or solid reactants to achieve a heterogeneous reaction process. The solid is usually granular, the particle size is about 2-15 mm, and the solid is stacked into a bed layer with a certain height (or thickness). The bed is stationary and the fluid is passed through the bed for reaction. It differs from fluidized bed reactors and moving bed reactors in that the solid particles are in a quiescent state. The fixed bed reactor is mainly used for realizing gas-solid phase catalytic reaction, such as an ammonia synthesis tower, a sulfur dioxide contact oxidizer, a hydrocarbon steam converter and the like. When the catalyst is used for gas-solid phase or liquid-solid phase non-catalytic reaction, the bed layer is filled with solid reactants. Trickle bed reactors can also be classified as fixed bed reactors, in which gas and liquid phases flow downward through the bed layer in parallel and are in gas-liquid-solid phase contact.
Dehydration is a chemical unit process, which is the reverse process of hydration. The water molecules are liberated from the substance molecules, so that for simple hydrates, the water is easily liberated and evaporated by heating, and if the sodium carbonate hydrate crystals are heated, the water is dehydrated into sodium carbonate powder. However, for the new substance only partially combined with water molecules, the dehydration must be carried out by means of a catalyst or by controlling other conditions, such as the dehydration of ethanol to ethylene or diethyl ether.
Generally, in a chemical plant having both a reaction step and a dehydration step, in order to facilitate the addition of materials such as a catalyst during the dehydration step, the reaction step and the dehydration step are generally performed by two separate devices, and in the dehydration step, raw materials produced in the reaction step are added by a manual method or the like in combination with the catalyst, so that continuous production cannot be realized, and the volatilization of the raw materials is likely to occur during the transfer of the raw materials between the two devices.
In view of the above-mentioned drawbacks, the authors of the present invention have finally obtained the present invention through long-term research and practice.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical defects, the technical scheme adopted by the utility model is to provide a chemical production device, which comprises a fixed bed reaction device and a dehydration device, wherein the fixed bed reaction device and the dehydration device are connected through a conduit;
the fixed bed reaction device comprises at least two input pipelines, a reaction furnace, a first condenser and a collector, wherein the input pipelines are connected with an inlet of the reaction furnace, an outlet of the reaction furnace is connected with the collector through the first condenser, and an outlet of the collector is connected with an inlet of the dehydration device;
the dehydration device comprises a raw material tank, a heating cavity, a membrane assembly, a vacuum assembly and a second condenser, wherein an outlet of the fixed bed reaction device is connected with the raw material tank, the raw material tank is connected with the membrane assembly through an inlet pipe and an outlet pipe, the raw material tank is arranged in the heating cavity, the membrane assembly is of a cylindrical structure, a pervaporation membrane is arranged in the cylindrical structure, the membrane assembly is connected with the vacuum assembly, and the membrane assembly is connected with the second condenser.
Preferably, the input pipeline is sequentially provided with a filter, a pressure reducing valve, a flowmeter and a one-way valve, the filter filters the conveyed reaction substances, the input pipeline is further provided with a first switch valve and a second switch valve, the first switch valve is used for controlling the on-off of the whole input pipeline, the second switch valve and the flowmeter are arranged in parallel, the one-way valve is used for avoiding the backflow of the reaction substances in the input pipeline, and the pressure reducing valve is used for adjusting the pressure in the input pipeline.
Preferably, pressure gauges are arranged at two ends of the pressure reducing valve.
Preferably, a three-way valve is arranged between the first condenser and the collector, and the three-way valve is respectively connected with the first condenser, the collector and the inlet of the reaction furnace.
Preferably, the first condenser and the collector are both communicated with cooling liquid, the cooling liquid between the first condenser and the collector is communicated through a guide pipe, and the cooling liquid in the first condenser is transported to the collector through the guide pipe.
Preferably, the inlet pipe and the outlet pipe are provided with thermometers at the ends close to the membrane module.
Preferably, the inlet pipe is connected with the raw material tank through a return pipe, and the return pipe is provided with a return valve.
Preferably, the return pipe is also provided with an exhaust valve; the reflux pipe, the outlet pipe and the connecting port of the raw material tank are arranged at the top of the raw material tank, and the inlet pipe and the connecting port of the raw material tank are arranged at the bottom of the raw material tank.
Preferably, the reaction furnace comprises a first connection section, a second connection section, a reaction section and a pre-cooling section which are sequentially arranged from top to bottom, the first connection section and the second connection section, the second connection section and the reaction section, the reaction section and the pre-cooling section are detachably connected through a sealing sleeve, the first connection section, the second connection section, the reaction section and the pre-cooling section are all arranged in a hollow mode, the first connection section, the second connection section, the reaction section and the pre-cooling section are all communicated internally, a vent pipe is arranged on the axis of the reaction furnace, the first connection section and the second connection section are all provided with feeding interfaces, the feeding interfaces are connected with the input pipeline, the pre-cooling section is provided with a discharge port, and the discharge port is connected with the first condenser.
Preferably, the reaction section comprises an inner cylinder and an outer cylinder, the inner cylinder is arranged in the outer cylinder and is in sealed connection with the outer cylinder, an annular sealed cavity is formed between the inner cylinder and the outer cylinder, and the cavity in the inner cylinder is communicated with the second connecting section and the pre-cooling section; the cavity in the inner cylinder is provided with a solid catalyst, the first connecting joint and the second connecting joint are provided with preheating parts, the outer cylinder is provided with a heat conduction interface, and the heat conduction interface is used for introducing heat conduction liquid into an annular sealing cavity between the inner cylinder and the outer cylinder.
Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model discloses a pervaporation membrane carries out going on of dehydration technology, need not to fill other materials such as catalyst, makes fixed bed reaction unit with dehydrating unit is whole to be in sealing connection's enclosed state, can realize going on from the reaction process to the continuation of dehydration process, very big improvement chemical production efficiency, avoid pollution or loss in the raw materials transfer process simultaneously.
Drawings
FIG. 1 is a view showing the structure of the chemical production apparatus;
FIG. 2 is a structural view of the fixed-bed reaction apparatus;
FIG. 3 is a structural view of the dehydration apparatus;
fig. 4 is a structural view of the reaction furnace.
The figures in the drawings represent:
1-an input pipeline; 2-a reaction furnace; 3-a first condenser; 4-a collector; 5-a raw material tank; 6, heating the cavity; 7-a membrane module; 8-a vacuum assembly; 9-a second condenser; 10-pipe feeding; 11-an outlet pipe; 12-a filter; 13-a pressure relief valve; 14-a flow meter; 15-a one-way valve; 16-a first on-off valve; 17-a second on-off valve; 18-three-way valve; 19-back pressure valve; 20-needle type valves; 21-blowdown/inlet detector; 22-a cooling pump; 23-a return pipe; 24-a reflux valve; 25-an exhaust valve; 26-a first connection; 27-a second connecting joint; 28-reaction section; 29-pre-cooling section; 30-sealing the sleeve; 31-a feed interface; 32-a thermally conductive interface; 33-a blow-down pipe; 34-a discharge hole; 35-sampling port.
Detailed Description
The above and further features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.
Example one
As shown in fig. 1, fig. 1 is a structural view of the chemical production apparatus; chemical production equipment includes fixed bed reaction unit and dewatering device, fixed bed reaction unit with dewatering device passes through pipe lug connection.
Specifically, fixed bed reaction unit includes two at least input pipeline 1, reacting furnace 2, first condenser 3 and collector 4, input pipeline 1 with reacting furnace 2's access connection, reacting furnace 2's export is passed through first condenser 3 with collector 4 is connected, and the reaction mass passes through input pipeline 1 inputs carry out the reaction in reacting furnace 2, through the condensation effect liquefaction of first condenser 3 and collect in the collector 4, the export of collector 4 with dewatering device's access connection.
The dehydration device comprises a raw material tank 5, a heating cavity 6, a membrane component 7, a vacuum component 8 and a second condenser 9, the outlet of the fixed bed reaction device is connected with the raw material tank 5, the feed tank 5 and the membrane module 7 are connected by an inlet pipe 10 and an outlet pipe 11, which are, in general, the raw material tank 5 feeds the raw material into the membrane module 7 through the inlet pipe 10, the raw material dehydrated in the membrane module 7 returns to the raw material tank 5 through the outlet pipe 11, the raw material tank 5 and the membrane module 7 are arranged in the heating cavity 6, the membrane module 7 is a cylindrical structure with a pervaporation membrane arranged inside, the membrane component 7 is connected with the vacuum component 8, raw materials are dehydrated through the pervaporation membrane in a vacuum pumping state, the membrane module 7 is connected with the second condenser 9 and is used for condensing the permeated gas after the permeation of the membrane.
The water-containing raw material obtained by the reaction of the fixed bed reaction device is added into the raw material tank 5, the heating cavity 6 is used for heating the whole raw material tank 5 and the membrane component 7, so that the water in the water-containing raw material is in a gasification state, the membrane component 7 is connected with the vacuum component 8 to enable the gasified water to be subjected to membrane permeation, the permeation gas passes through the second condenser 9 and is condensed and collected in a permeation liquid bottle, the raw material passes through the membrane component 7 and is dehydrated and then returned to the raw material tank 5, the continuous circulation is carried out, and the raw material and the permeation liquid are sampled at regular time until the material liquid in the raw material tank 5 reaches the water content which is less than 1.0 percent.
The utility model discloses a pervaporation membrane carries out going on of dehydration technology, need not to fill other materials such as catalyst, makes fixed bed reaction unit with dehydrating unit is whole to be in sealing connection's enclosed state, can realize going on from the reaction process to the continuation of dehydration process, very big improvement chemical production efficiency, avoid pollution or loss in the raw materials transfer process simultaneously.
Example two
As shown in fig. 2, fig. 2 is a structural view of the fixed-bed reaction apparatus; the input pipeline 1 is provided with a filter 12, a switch valve, a pressure reducing valve 13, a flowmeter 14 and a one-way valve 15, the filter 12 is used for filtering the delivered reaction substance, the switch valve is provided with a plurality of, wherein a first switch valve 16 is used for controlling the opening or closing of the single input pipeline 1, a second switch valve 17 is arranged in parallel with the flow meter 14, by closing the second on-off valve 17, the reaction substance is passed only from the pipe section provided with the flow meter 14, so that the flow rate of the reaction substance in the input pipeline 1 can be accurately measured, the second switch valve 17 is opened to realize the rapid passing of the reaction substance, the check valve 15 is used for preventing the reaction materials in the input pipeline 1 from flowing back, and the pressure reducing valve 13 is used for adjusting the pressure in the input pipeline 1 to ensure the safety of the input pipeline 1.
Preferably, pressure gauges are arranged at two ends of the pressure reducing valve 13, so that the specific state of pressure reduction can be observed conveniently.
Preferably, an emptying pipe is arranged in the reaction furnace 2, and the emptying of the generated gas in the reaction furnace 2 is realized through the emptying pipe.
The first condenser 3 with be provided with three-way valve 18 between the collector 4, three-way valve 18 respectively with first condenser 3 the collector 4 with the access connection of reacting furnace 2, reactant is in under the condition that the reaction did not reach the expectancy state in the reacting furnace 2 the accessible with the condenser with reacting furnace 2 access connection makes reactant return react in the reacting furnace 2 again in order finally to reach the expectancy state.
The collector 4 is also provided with a detection pipeline which is provided with a filter, a back pressure valve 19, a needle valve 20 and an emptying/feeding detector 21 for realizing emptying detection.
Generally, first condenser 3 with all lead to in the collector 4 has the coolant liquid to realize the cooling effect to the raw materials, just first condenser 3 with coolant liquid between the collector 4 communicates with each other, realizes through setting up cooling pump 22 first condenser 3 with the transportation of coolant liquid between the collector 4, outside low-temperature coolant liquid passes through reentrant behind the first condenser 3 in the collector 4, with the reasonable utilization of coolant liquid for fully absorbing the heat, simultaneously because the collector 4 with the lug connection of head tank 5 avoids heating cavity 6 is right the heating of head tank 5 and right the indirect influence of collector 4.
EXAMPLE III
As shown in fig. 3, fig. 3 is a structural view of the dehydration apparatus; the inlet pipe 10 and the outlet pipe 11 are provided with thermometers at the ends close to the membrane module 7, and are used for detecting the temperature of the raw material entering and exiting from the membrane module 7 in real time.
The inlet pipe 10 is provided with a pressure gauge for detecting the pressure state of the inlet pipe 10.
The inlet pipe 10 is connected with the raw material tank 5 through a return pipe 23, the return pipe 23 is provided with a return valve 24, and the return valve 24 is started under the condition that the pressure of the inlet pipe 10 is overlarge to realize the quick pressure relief of the inlet pipe 10. Preferably, the return pipe 23 is further provided with an exhaust valve 25, and the gas is rapidly exhausted through the exhaust valve 25 due to an excessive pressure caused by a vaporization phenomenon during the heating process.
Generally, the connection ports of the return pipe 23, the outlet pipe 11 and the raw material tank 5 are disposed at the top of the raw material tank 5, and the connection ports of the inlet pipe 10 and the raw material tank 5 are disposed at the bottom of the raw material tank 5, thereby facilitating the transportation of raw materials and the discharge of gas.
The bottom of head tank 5 still is provided with the discharging pipe for discharge after the raw materials dehydration is accomplished and to the sampling of raw materials in the head tank 5, second condenser 9 is provided with gets the material pipe, is used for the sampling to the permeate.
Example four
As shown in fig. 4, fig. 4 is a structural view of the reaction furnace; the reaction furnace 2 comprises a first connecting joint 26, a second connecting joint 27, a reaction joint 28 and a pre-cooling joint 29 which are sequentially arranged from top to bottom, wherein the first connecting joint 26 is detachably connected with the second connecting joint 27, the second connecting joint 27 is detachably connected with the reaction joint 28, and the reaction joint 28 is detachably connected with the pre-cooling joint 29 through a sealing sleeve 30, so that the sealing performance of the connecting position is ensured.
The reaction furnace 2 is provided with a plurality of sections, which is convenient for dismounting and replacing each section and is also convenient for filling solid catalyst.
The first connecting joint 26, the second connecting joint 27, the reaction joint 28 and the pre-cooling joint 29 are all arranged in a hollow manner, the first connecting joint 26, the second connecting joint 27, the reaction joint 28 and the pre-cooling joint 29 are all communicated internally, and the vent pipe 33 is arranged on the axis of the reaction furnace 2.
The reaction section 28 is provided with a double-layer structure, specifically, the reaction section 28 includes an inner cylinder and an outer cylinder, the inner cylinder is provided in the outer cylinder, and the inner cylinder and the outer cylinder are hermetically connected, so that an annular sealed cavity is formed between the inner cylinder and the outer cylinder, and the cavity in the inner cylinder is communicated with the second connection section 27 and the pre-cooling section 29.
The cavity in the inner cylinder is provided with a solid catalyst, and the two ends of the inner cylinder are provided with plug plates, so that the solid catalyst is limited in the inner cylinder.
The first connecting joint 26 and the second connecting joint 27 are provided with a feeding interface 31, and the feeding interface 31 is used for connecting the input pipeline 1, so that reaction substances are transported to the first connecting joint 26 and the second connecting joint 27 respectively and are mixed in the first connecting joint 26 and the second connecting joint 27. Generally, a preheating part is provided corresponding to the first connecting joint 26 and the second connecting joint 27, the preheating part may be a heating wire, a heating sleeve, or other reasonable structures, and after the reaction materials are sufficiently preheated by mixing in the first connecting joint 26 and the second connecting joint 27, the reaction materials enter the inner cylinder with the solid catalyst, and the corresponding reaction is realized by the catalytic action of the solid catalyst to generate raw materials.
Preferably, the outer cylinder is provided with a heat conducting interface 32, and the heat conducting interface 32 is used for introducing heat conducting liquid into an annular sealing cavity between the inner cylinder and the outer cylinder, so as to realize a temperature control effect on the reaction section 28 and ensure that the reaction in the reaction section 28 is in a better temperature environment.
The material produced by the reaction in the reaction section 28 is fed into the pre-cooling section 29 to be pre-cooled. The pre-cooling section 29 is provided with a discharge port 34 and a sampling port 35, the discharge port 34 is connected with the first condenser 3, the pre-cooled raw material enters the first condenser 3 through the discharge port 34, and the sampling of a reaction product is realized through the sampling port 35 to see whether the product is the raw material or whether the reaction is complete.
Meanwhile, the first connecting joint 26, the second connecting joint 27, the reaction joint 28 and the pre-cooling joint 29 may be all configured as a cylindrical structure, and under the sealing effect of the sealing sleeve 30, the position movement of each interface may also be realized through the relative rotation of the adjacent joints, so as to adapt to the connection relationship according to the actual situation.
EXAMPLE five
The use method of the chemical production equipment specifically comprises the following steps:
s1, inputting reaction materials into the reaction furnace 2 through the input pipeline 1 for reaction, liquefying by the condensation effect of the first condenser 3, and collecting the raw materials generated by the reaction in the collector 4;
s2, flowing the raw material generated by the reaction in the collector 4 into the raw material tank 5 through a conduit;
s3, starting heating the raw material through the heating cavity 6, and setting the heating temperature to 110 ℃;
s4, when the temperature rises to 70 ℃, starting the vacuum assembly 8, and setting the vacuum degree to be 300 mbar;
s5, setting a vacuum degree of 10mbar when the temperature rises to 110 ℃, further adjusting the heating temperature to 120 ℃, starting dehydration, and sampling and analyzing at regular time;
and S6, adjusting the heating temperature to 130 ℃ again after half an hour according to the situation.
In this example, ethylene glycol monomethyl ether was produced by the above-described method, the water content in the feed was 15.04% as measured by sampling in the collector 4, the pervaporation membrane was a ceramic inorganic membrane, and the data obtained during step S6 are shown in the following table;
as can be seen from the table, the raw material was reduced from 11.27% water to 0.70% after 330min, and the average treatment amount was about 18.02kg/m2H; the accumulated water content of the penetrating fluid is 98.47 percent, and the accumulated raw material loss rate is 0.24 percent.
Through the utility model provides a use method is guaranteeing to go on in succession from reaction process to dehydration process, under very big improvement chemical production efficiency's the prerequisite, can realize high dehydration rate and low loss rate, has very big practical value.
The foregoing is only a preferred embodiment of the present invention, which is illustrative, not limiting. Those skilled in the art will appreciate that many variations, modifications, and equivalents may be made thereto without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The chemical production equipment is characterized by comprising a fixed bed reaction device and a dehydration device, wherein the fixed bed reaction device is connected with the dehydration device through a conduit;
the fixed bed reaction device comprises at least two input pipelines, a reaction furnace, a first condenser and a collector, wherein the input pipelines are connected with an inlet of the reaction furnace, an outlet of the reaction furnace is connected with the collector through the first condenser, and an outlet of the collector is connected with an inlet of the dehydration device;
the dehydration device comprises a raw material tank, a heating cavity, a membrane assembly, a vacuum assembly and a second condenser, wherein an outlet of the fixed bed reaction device is connected with the raw material tank, the raw material tank is connected with the membrane assembly through an inlet pipe and an outlet pipe, the raw material tank is arranged in the heating cavity, the membrane assembly is of a cylindrical structure, a pervaporation membrane is arranged in the cylindrical structure, the membrane assembly is connected with the vacuum assembly, and the membrane assembly is connected with the second condenser.
2. The chemical production equipment as claimed in claim 1, wherein the input pipeline is sequentially provided with a filter, a pressure reducing valve, a flowmeter and a one-way valve, the filter filters the transported reactant, the input pipeline is further provided with a first switch valve and a second switch valve, the first switch valve is used for controlling the on and off of the whole single input pipeline, the second switch valve and the flowmeter are arranged in parallel, the one-way valve is used for avoiding the reflux of the reactant in the input pipeline, and the pressure reducing valve is used for adjusting the pressure in the input pipeline.
3. The chemical production apparatus according to claim 2, wherein pressure gauges are provided at both ends of the pressure reducing valve.
4. The chemical production apparatus according to claim 1, wherein a three-way valve is provided between the first condenser and the collector, and the three-way valve is connected to the first condenser, the collector, and an inlet of the reaction furnace, respectively.
5. The chemical production apparatus according to claim 1, wherein the first condenser and the collector are both filled with a coolant, and the coolant between the first condenser and the collector is communicated through a flow guide pipe, and the coolant in the first condenser is transported to the collector through the flow guide pipe.
6. The chemical production apparatus of claim 1, wherein the inlet pipe and the outlet pipe are each provided with a thermometer at an end portion near the membrane module.
7. Chemical production plant according to claim 6, wherein the inlet pipe is connected to the feed tank via a return pipe, which return pipe is provided with a return valve.
8. The chemical production apparatus as claimed in claim 7, wherein the return pipe is further provided with an exhaust valve; the reflux pipe, the outlet pipe and the connecting port of the raw material tank are arranged at the top of the raw material tank, and the inlet pipe and the connecting port of the raw material tank are arranged at the bottom of the raw material tank.
9. The chemical production equipment as claimed in claim 1, wherein the reaction furnace comprises a first connection section, a second connection section, a reaction section and a pre-cooling section which are arranged from top to bottom in sequence, the first connection section and the second connection section, the second connection section and the reaction section and the pre-cooling section are detachably connected through sealing sleeves, the first connection section, the second connection section, the reaction section and the pre-cooling section are all arranged in a hollow manner, the first connection section, the second connection section, the reaction section and the pre-cooling section are all communicated internally, a vent pipe is arranged on the axis of the reaction furnace, the first connection section and the second connection section are all provided with a feeding interface, the feeding interface is connected with the input pipeline, the pre-cooling section is provided with a discharge hole, the discharge port is connected with the first condenser.
10. The chemical production equipment of claim 9, wherein the reaction section comprises an inner cylinder and an outer cylinder, the inner cylinder is arranged in the outer cylinder, the inner cylinder and the outer cylinder are in sealed connection, an annular sealed cavity is formed between the inner cylinder and the outer cylinder, and the cavity in the inner cylinder is communicated with the second connecting section and the pre-cooling section; the cavity in the inner cylinder is provided with a solid catalyst, the first connecting joint and the second connecting joint are provided with preheating parts, the outer cylinder is provided with a heat conduction interface, and the heat conduction interface is used for introducing heat conduction liquid into an annular sealing cavity between the inner cylinder and the outer cylinder.
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| CN111229134A (en) * | 2020-03-24 | 2020-06-05 | 安徽立兴化工有限公司 | Chemical production equipment and use method |
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| CN111229134A (en) * | 2020-03-24 | 2020-06-05 | 安徽立兴化工有限公司 | Chemical production equipment and use method |
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Address after: 245399 No. 10, Zhongwang Road, Huayang Town, Jixi County, Xuancheng City, Anhui Province Patentee after: Anhui Lixing New Material Co.,Ltd. Address before: 230000 No. 10, Zhongwang Road, Huayang Town, Jixi County, Xuancheng City, Anhui Province Patentee before: ANHUI LIXING CHEMICAL Co.,Ltd. |