CN113432111B - Automatic change heat recovery unit in propylene oxidation legal system acrylic acid production line - Google Patents
Automatic change heat recovery unit in propylene oxidation legal system acrylic acid production line Download PDFInfo
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- CN113432111B CN113432111B CN202110977877.6A CN202110977877A CN113432111B CN 113432111 B CN113432111 B CN 113432111B CN 202110977877 A CN202110977877 A CN 202110977877A CN 113432111 B CN113432111 B CN 113432111B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G1/00—Steam superheating characterised by heating method
- F22G1/16—Steam superheating characterised by heating method by using a separate heat source independent from heat supply of the steam boiler, e.g. by electricity, by auxiliary combustion of fuel oil
- F22G1/165—Steam superheating characterised by heating method by using a separate heat source independent from heat supply of the steam boiler, e.g. by electricity, by auxiliary combustion of fuel oil by electricity
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Abstract
The invention relates to a heat energy recovery device in an automatic acrylic acid production line by a propylene oxidation method, which relates to the technical field of chemical equipment and comprises a tank body, ring frames, infrared heating pipes, a control box and a connecting table, wherein a plurality of ring frames are embedded in the tank body at intervals; the invention has the advantages of improved steam recovery efficiency and low secondary resource consumption.
Description
Technical Field
The invention relates to the technical field of chemical equipment, in particular to a heat energy recovery device in an acrylic acid production line by an automatic propylene oxidation method.
Background
The production of acrylic acid or methacrylic acid by the two-step oxidation of (meth) propylene is a mature process, and the key to the mature process for improving the economic efficiency of a plant is to reduce the energy consumption of the plant and reduce the human capital investment. The full utilization of the oxidation reaction heat of the propylene and the incineration waste heat of the oxidation tail gas is the consensus of energy conservation and consumption reduction in the production of acrylic acid or methacrylic acid by the two-step oxidation of the propylene. The heat of the propylene oxidation reaction is taken by molten salt in the reactor, cooling water is heated by a cooler to generate steam for cooling the molten salt so as to maintain the reaction temperature of the reactor, and the steam generated by heat exchange drives a steam turbine to do work to realize the aim of recycling reaction heat energy. In order to ensure the stability of the steam, the steam is generally superheated by an apparatus waste liquid incinerator. In practical application, the waste liquid incinerator can meet the requirement of waste liquid treatment of the device due to intermittent operation, the overheating of steam is stable, the overheating device is required to be continuously operated, the incinerator cannot be stopped, the waste of fuel of the incinerator is caused, the overall economic benefit of system heat energy recycling is reduced, meanwhile, the investment of the overheating device of the incinerator is large, the device needs to be replaced periodically, the device investment is increased, the automation degree of the operation of the previous device is low, the labor intensity of workers is high, and the current policy requirements of environmental protection and safety on the working environment of the workers and the higher and higher labor protection requirements are not met.
Therefore, in order to solve the problems of the steam stabilization and overheating energy waste of the propylene oxidation reaction heat recycling system, low automation operation degree of the system and high labor intensity, a heat energy recovery device in an automatic production line for preparing acrylic acid by a propylene oxidation method needs to be provided.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the technical problem of low recovery efficiency of the conventional steam heat energy recovery device.
(II) technical scheme
In order to solve the technical problem, the invention provides a heat energy recovery device in an acrylic acid production line by an automatic propylene oxidation method, which comprises a tank body, a ring frame, an infrared heating pipe, a control box and a connecting table, wherein the bottom of the tank body is provided with a main air inlet pipe orifice and an auxiliary air inlet pipe orifice so that steam enters the tank body; the top of the tank body is provided with a steam outlet, and a pressure reducing valve is connected outside the steam outlet; the infrared heating pipes are distributed in the middle of the ring frame at intervals, the length direction of the infrared heating pipes is the same as that of the tank body, the control box is fixedly connected to one end of each infrared heating pipe, and the connecting table is fixedly connected to one side of the control box; wherein, infrared heating pipe use quantity satisfies:
the distribution distance of the infrared heating pipes meets the following requirements:
in the formula (I), the compound is shown in the specification,
mtaking an integer before decimal point for the number of the infrared heating pipes;
pi is 3.14;
r is the radius of the inner cavity of the tank body and is m;
k is the distribution distance of the infrared heating pipes, and the unit is m;
As a further illustration of the invention, it is preferable that the radius of the inner cavity of the tank body is not less than 1m, and the length of the infrared heating tube is less than half of the length of the tank body.
As a further explanation of the present invention, preferably, the middle part of the ring frame is fixedly connected with a pillar, two sides of the pillar are fixedly connected with semi-annular support rings, and the infrared heating pipes penetrate into the support rings at intervals so as to be distributed at intervals in an annular shape; a plurality of support rings with different radiuses are fixedly connected to one support column, and the axes of the support rings with different radiuses are overlapped.
As a further explanation of the present invention, it is preferable that the support ring is a horn-shaped half ring made of stainless steel, an included angle between a generatrix of the support ring and a cross section perpendicular to an axis of the tank body is less than 20 °, and a horn mouth of the support ring faces away from the control box.
As a further explanation of the present invention, preferably, the bottom of the ring frame is bent towards the axis of the ring frame to form a n-shaped protruding frame, the pillar is fixedly connected between the protruding frame and the top of the ring frame, and the axis of the support ring is located above the axis of the tank body.
As a further explanation of the present invention, it is preferable that the inner cavity wall of the tank body is filled with a heat insulating layer, the heat insulating layer is made by splicing heat insulating plates, and the heat insulating layer is attached to the inner wall of the tank body.
As a further description of the present invention, preferably, the inner wall cavity of the thermal insulation layer is adhered with a scattering layer, the scattering layer is made of a stainless steel thin plate, and the inner surface of the scattering layer forms a rough surface by knocking.
As a further explanation of the present invention, it is preferable that a connecting rod is fixedly connected between the ring frames, the control box is fixedly connected to the connecting rod, the control box is a disk-shaped housing made of a heat insulating material, a circuit board is installed in the control box, and a power line of the infrared heating pipe is electrically connected with the circuit board in the control box.
As a further explanation of the present invention, it is preferable that the connector is a tubular structure, and an electrode plug is provided in the connector; the top of the connector is fixedly connected with a connecting table through a bolt, and the top of the connecting table is provided with an insertion hole; one side of the top of the tank body is provided with a cable interface, a transformer joint is inserted in the cable interface, the transformer joint is provided with a conduit, the conduit penetrates through the jack and extends into the connector, and the caliber of the jack is larger than that of the cable interface.
As a further explanation of the present invention, preferably, the top of the connecting platform is provided with a boss, the top of the boss is provided with an arc surface, the radius of the arc surface at the top of the boss is the same as the radius of the inner cavity of the tank body, and the top of the boss abuts against the end surface of the inner cavity of the tank body.
(III) advantageous effects
The technical scheme of the invention has the following advantages:
according to the invention, the infrared heating pipe is arranged in the flash tank, heating is started when the temperature of steam is reduced to some extent, the steam liquefaction amount is reduced, the steam output by the flash tank is ensured to keep a low-pressure high-temperature state, the normal operation of the steam turbine can be further promoted, the steam is not required to be introduced into the superheater for additional heating, and the heat efficiency is improved. In addition, through reasonable arrangement mode and automatic control of the infrared heating pipes, the material cost can be reduced, the heating efficiency can be maximized, the energy utilization rate is increased while the electric energy consumption is reduced, the secondary temperature rise is carried out through the superheater in the prior art, the heat energy utilization rate can be increased by 44 percent, and the electric energy consumption is reduced by about 30 percent.
Drawings
FIG. 1 is an internal structural view of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is an enlarged view of A in FIG. 2;
FIG. 4 is an enlarged view of B in FIG. 2;
FIG. 5 is a bottom view of the present invention;
FIG. 6 is a top view of the present invention;
fig. 7 is a view of the support ring structure of the present invention.
In the figure: 1. a tank body; 11. a main air inlet pipe orifice; 12. an auxiliary air inlet pipe orifice; 13. monitoring the pipe orifice; 14. a cable interface; 15. a steam outlet; 16. a heat-insulating layer; 17. a scattering layer; 18. annular chamfering; 2. a ring frame; 21. a connecting rod; 22. a pillar; 23. a support ring; 24. a convex frame; 25. supporting a tube; 3. an infrared heating pipe; 31. heating the pipe joint; 4. a control box; 41. a support leg; 42. a connecting portion; 5. a connector; 51. a connecting table; 52. a jack; 53. a boss; 6. a transformer terminal; 61. a conduit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The utility model provides an automatic change heat recovery unit in propylene oxidation legal system acrylic acid production line, combines figure 1, figure 2, including a jar body 1, ring frame 2, infrared heating pipe 3, control box 4 and connection platform 5, a plurality of ring frame 2 interval embedding is at jar internal 1, and 3 interval distributions of a plurality of infrared heating pipe are in ring frame 2 middle parts, and 3 length direction of infrared heating pipe are the same with jar body 1 length direction, and control box 4 links firmly in 3 one end of infrared heating pipe, and connection platform 4 links firmly in control box 4 one side.
With reference to fig. 5 and 6, the tank body 1 is a stainless steel cylindrical tank, and can be made into a vertical tank or a horizontal tank according to actual requirements. The bottom of the tank body 1 is provided with a main air inlet pipe orifice 11 and an auxiliary air inlet pipe orifice 12, and the main air inlet pipe orifice 11 is connected with a cooler water outlet pipeline of the main reactor through a flange and a bolt. The secondary air inlet pipe orifice 12 is connected with a cooler water outlet pipeline of the secondary reactor through a flange and a bolt. The main air inlet pipe orifice 11 and the auxiliary air inlet pipe orifice 12 are arranged so that steam which is subjected to cooling work can enter the tank body 1. The middle part of the top end of the tank body 1 is provided with a monitoring pipe orifice 13, and the monitoring pipe orifice 13 is connected with electronic instruments such as an electronic pressure gauge, a temperature measurer, a hygrometer and the like through flanges and bolts and is used for monitoring the change condition of each index in the tank body 1. One side of the top of the tank body 1 is provided with a cable interface 14, a transformer joint 6 is inserted in the cable interface 14, the transformer joint 6 is provided with a conduit 61, a power line and a signal line are arranged in the conduit 61, and the conduit 61 penetrates through the cable interface 14 and extends into the connector 5 so as to supply power to the electronic facility and the infrared heating pipe 3 in the control box 4 through the connector 5. One side of the top of the tank body 1 is provided with a steam outlet 15, and the steam outlet 15 is externally connected with a pressure reducing valve, so that pressure difference is formed inside and outside the tank body 1, and the flash evaporation effect is realized.
The two-step oxidation reaction of propylene is respectively carried out in the main reactor and the auxiliary reactor, wherein the reaction temperature in the main reactor reaches 310-340 ℃, the temperature in the auxiliary reactor reaches 275-310 ℃, and therefore the temperature of cooling water after the main reactor and the auxiliary reactor are cooled by the cooler is not lower than 100 ℃. After steam enters the tank body 1 through the pipeline, the air pressure at the end of the steam outlet 15 is reduced under the action of the pressure reducing valve, the air pressure in the tank body 1 is higher, liquefied steam in the tank body 1 is evaporated into a gaseous state again and flows to a steam turbine through the pipeline, and the steam turbine can adopt a back pressure type reaction steam turbine and has the properties of low air inlet pressure and high rotating speed. The steam inlet pressure is only 1.8-2.0 MPa (a), the temperature is 300 ℃, the flow is 24-26 t/h, the steam exhaust pressure is 0.25-0.28 MPa (a), and the rated rotating speed of the unit is 12500-13500 r/min.
With reference to fig. 2 and 4, the inner cavity wall of the tank body 1 is filled with an insulating layer 16, and the insulating layer 16 is made by splicing insulating plates, preferably aluminum silicate soft plates, which have excellent high temperature resistance and heat insulation effects. The heat preservation layer 16 is attached to the inner wall of the tank body 1 and used for avoiding the heat dissipation of steam in the tank body 1 and ensuring that the energy consumption is less when the subsequent secondary heating is carried out to the target temperature than when the subsequent secondary heating is carried out to the target temperature. The scattering layer 17 is adhered to the inner wall cavity of the heat-insulating layer 16, the scattering layer 17 is made of a stainless steel thin plate, the inner surface of the scattering layer 17 forms a rough surface through knocking, the scattering layer 17 can block water for the heat-insulating layer 16, the structural strength of the tank body 1 can be further improved by matching with the heat-insulating layer 16, and the structural damage of the tank body 1 caused by excessive internal and external pressure difference is avoided; can also be through the infrared ray of unevenness rough surface scattering infrared heating pipe 3 production, make each part can the thermally equivalent in the jar body 1, solve the problem that steam self heat-conduction efficiency is low, the steam temperature that the guarantee got into in the steam turbine keeps balanced, makes the steam turbine can the steady operation.
Referring to fig. 1 and 2, the ring frame 2 is made of a ring-shaped metal rod, and the outer diameter of the ring frame 2 is equal to the inner diameter of the tank body 1, so that the ring frame 2 can support various components in the tank body 1. The number of the ring frames 2 used in the tank body 1 is determined according to the length of the tank body 1, at least two ring frames 2 are generally placed in the tank body 1, and connecting rods 21 are fixedly connected between the ring frames 2 through bolts or welding, so that the ring frames 2 form a whole body and are convenient to be installed in the tank body 1 together. The middle part of the ring frame 2 is fixedly connected with a strut 22, the strut 22 is a cylindrical rod, the length direction of the strut 22 is vertical, two sides of the strut 22 are fixedly connected with a semi-annular support ring 23, and the infrared heating pipes 3 penetrate into the support ring 23 at intervals so that the infrared heating pipes 3 are distributed at intervals in an annular shape; a plurality of support rings 23 with different radiuses are fixedly connected to one support column 22, and the axes of the support rings 23 with different radiuses are overlapped, so that the infrared heating pipes 3 can be uniformly distributed. Referring to fig. 3, a support tube 25 is disposed at the joint of the support ring 23 and the infrared heater 3, and the length of the support tube 25 is greater than the thickness of the support ring 23, so as to increase the contact area between the support ring 23 and the infrared heater 3, and enable the support ring 23 to stably support the infrared heater 3.
Referring to fig. 1 and 2, the infrared heating tube 3 is an HRTD-M type infrared heating tube, the maximum working temperature of which can reach 800 ℃, the general tube diameter of which is 18mm, and which is resistant to high pressure. In order to reduce the use cost of the infrared heating pipe 3 and to maximize the utilization of the heat generated by the infrared heating pipe 3, the infrared heating pipe 3 needs to be arranged reasonably. Wherein, the using amount of the infrared heating pipes 3 satisfies:
the distribution distance of the infrared heating pipes 3 meets the following requirements:
in the formula (I), the compound is shown in the specification,
mthe number of the infrared heating pipes 3 is counted before decimal pointAn integer number;
pi is 3.14;
r is the radius of the inner cavity of the tank body 1, the unit is m, and the radius of the inner cavity of the tank body 1 is not less than 1 m;
k is the distribution distance of the infrared heating pipes 3, and the unit is m;
And the length of the infrared heating pipe 3 is less than half of the length of the tank body 1, so that the customization cost of the infrared heating pipe 3 and the use number of the ring frames 2 are reduced.
Through the above calculation mode, the distribution quantity and the distribution position of the infrared heating pipes 3 can be quickly calculated by using a simple formula, and then the heat energy recovery device can exert the maximum energy utilization rate while using the least infrared heating pipes 3. Taking the tank body 1 with the radius of 3m as an example, 8 needed infrared heating pipes 3 can be calculated by substituting a formula, and the distance between every two infrared heating pipes 3 is 0.7 m. Meanwhile, the output quantity of the steam in the tank body 1 is kept at 24-26 t/h, the output temperature reaches 300 ℃ and above, so that the normal operation of the steam turbine is ensured, compared with the effect of adding a superheater to secondarily heat the steam outside a flash evaporation tank in the prior art, the electric energy consumption of the invention is reduced by about 30% after the steam turbine stably operates for 1 hour, the heat energy utilization rate of the invention is 44% higher than that of the superheater, the electric energy consumption can be reduced by about 10% compared with the tank body 1 without the heat preservation layer 16, and the loss of the original heat energy is avoided, so that the heat energy recovery of the steam can be realized by using less electric quantity.
In addition, in order to further improve the heat dissipation range of the shorter infrared heating tube 3, in combination with fig. 7, the support ring 23 may adopt a horn-shaped semi-ring structure made of stainless steel, the included angle between the generatrix of the support ring 23 and the cross section perpendicular to the axis of the tank body 1 is less than 20 °, and the bell mouth of the support ring 23 faces away from the control box 4. Through the support ring 23 that sets up the horn shape, when being located the infrared ray that infrared heating pipe 3 in the horn mouth distributes and shine support ring 23 surface, concentrate the infrared ray as far as possible by support ring 23 surface and reflect to the jar body 1 other end for the steam of keeping away from 3 one sides of infrared heating pipe also can obtain the heating better, compares the heat-conduction of steam self, adopts this kind of mode heat transfer speed faster. And the infrared ray that is located the infrared heating pipe 3 outside the bell mouth and distributes shines the support ring 23 surface, then reflects to jar body 1 internal wall, and at this moment under the effect of scattering layer 17, further makes the infrared ray distribute to infrared heating pipe 3 outside, improves heat transfer efficiency, avoids directly increasing the heating temperature of infrared heating pipe 3 in order to improve heat transfer efficiency, plays certain energy saving's effect.
With reference to fig. 1 and 2, the bottom of the ring frame 2 is bent towards the axis of the ring frame 2 to form a n-shaped convex frame 24, the pillar 22 is fixedly connected between the convex frame 24 and the top of the ring frame 2, the axis of the support ring 23 is positioned above the axis of the tank body 1, the convex frame 24 is arranged to play a role of supporting the pillar 22, and the ring frame 2 can not block impurities in the tank body 1 when the tank body 1 is cleaned in the future, so that the impurities in the tank body 1 can be flushed away and taken out of the tank body 1 by the cleaning water. And the convex frame 24 also lifts electronic devices such as the infrared heating tube 3 and the control box 4, and the electronic devices are prevented from being corroded by being contacted with clean water, so that the double purposes are achieved. Combine fig. 6, jar body 1 is located main air inlet pipe 11 and vice air inlet pipe 12 inner chamber mouth department and sets up annular chamfer 18 to avoid producing deckle edge when welding main air inlet pipe 11 and vice air inlet pipe 12, lead to later stage deckle edge to block impurity, make the problem that the cleaning water that mixes impurity can not be totally washed out impurity appear, guarantee cleaning efficiency.
Referring to fig. 1 and 3, the control box 4 is a disk-shaped casing made of heat insulating material, and the bottom of the control box 4 is fixedly connected with a leg 41, and the leg 41 is fixedly connected to the connecting rod 21 to support the control box 4. Be equipped with circuit board spare in the control box 4, circuit board spare electric connection in 3 power cords of infrared heating pipe and the control box 4 sets up control box 4 and is used for controlling infrared heating pipe 3 and opens and close and heating temperature, and through the data feedback of each detecting instrument of monitoring mouth of pipe 13 department, the work that enables the industrial computer through data line remote control infrared heating pipe 3 realizes automated control. And control box 4 separates the temperature and resists high pressure, ensures that electronic instrument can normally work. .
With reference to fig. 4 and 6, a connection portion 42 is fixedly connected to one side of the control box 4, and the connection portion 42 is fixedly connected to the connector 5 to fix the connector 5. The connector 5 is of a tubular structure, and an electrode plug is arranged in the connector 5 and is used for being connected with the conduit 61; the top of the connector 5 is fixedly connected with a connecting table 51 through bolts, the top of the connecting table 51 is provided with a jack 52, and the caliber of the jack 52 is larger than that of the cable interface 14. The top of the connecting table 51 is provided with a boss 53, the top of the boss 53 is provided with an arc surface, the radius of the arc surface at the top of the boss 53 is the same as that of the inner cavity of the tank body 1, and the top of the boss 53 is abutted against the end surface of the inner cavity of the tank body 1. When the installation is carried out, firstly, the ring frame 2 and the like extend into the tank body 1, then, the jack 52 of the connecting platform 51 faces the cable interface 14, the aperture of the jack 52 is larger than the aperture of the cable interface 14, so that the installation accuracy of the ring frame 2 and the like is reduced, the assembly difficulty is reduced, and then, the ring frame 2 and the lug boss 53 are welded on the scattering layer 17 to realize permanent fixation. The boss 53 is used for assisting in fixing the connector 5, plays a role in installation and positioning, and is provided with the connecting table 51 to reduce the manufacturing difficulty of the connector 5 and save the manufacturing cost. After the ring frame 2 and the like are installed, the cambered surfaces on the two sides of the tank body 1 are welded to complete the production of the heat energy recovery device, the assembling process is very simple and convenient, and the working difficulty is low.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. The utility model provides an automatic change heat recovery unit in propylene oxidation legal system acrylic acid production line which characterized in that: the steam heating tank comprises a tank body (1), a ring frame (2), an infrared heating pipe (3), a control box (4) and a connecting table (5), wherein a main air inlet pipe orifice (11) and an auxiliary air inlet pipe orifice (12) are arranged at the bottom of the tank body (1) so that steam enters the tank body (1); a steam outlet (15) is formed in the top of the tank body (1), and a pressure reducing valve and a steam turbine are connected outside the steam outlet (15); a plurality of ring frames (2) are embedded in the tank body (1) at intervals, a plurality of infrared heating pipes (3) are distributed in the middle of the ring frames (2) at intervals, the length direction of the infrared heating pipes (3) is the same as that of the tank body (1), a control box (4) is fixedly connected to one end of each infrared heating pipe (3), and a connecting table (5) is fixedly connected to one side of the control box (4); wherein, the length of the infrared heating pipe (3) is less than half of the length of the tank body (1); and the using number of the infrared heating pipes (3) meets the following requirements:
the distribution distance of the infrared heating pipes (3) meets the following requirements:
in the formula (I), the compound is shown in the specification,
mthe number of the infrared heating pipes (3) is selected from an integer before decimal point;
r is the radius of the inner cavity of the tank body (1) and the unit is m; the radius of the inner cavity of the tank body (1) is not less than 1 m;
k is the distribution distance of the infrared heating pipes (3) and the unit is m;
2. The heat energy recovery device in the production line for preparing acrylic acid by the automatic propylene oxidation method according to claim 1, wherein: the middle part of the ring frame (2) is fixedly connected with a strut (22), two sides of the strut (22) are fixedly connected with a semi-annular support ring (23), and the infrared heating pipes (23) penetrate into the support ring (23) at intervals so as to enable the infrared heating pipes (23) to be distributed at intervals in an annular shape; a plurality of support rings (23) with different radiuses are fixedly connected on one strut (22), and the axes of the support rings (23) with different radiuses are overlapped.
3. The automatic heat energy recovery device in the production line for preparing acrylic acid by the propylene oxidation method according to claim 2, wherein: the support ring (23) adopts a horn-shaped semi-ring made of stainless steel, the included angle between the generatrix of the support ring (23) and the cross section vertical to the axis of the tank body (1) is less than 20 degrees, and the horn mouth of the support ring (23) faces away from the control box (4).
4. The automatic heat energy recovery device in the production line for preparing acrylic acid by the propylene oxidation method according to claim 3, wherein: the bottom of the ring frame (2) is bent towards the axis of the ring frame (2) to form a n-shaped convex frame (24), the support column (22) is fixedly connected between the convex frame (24) and the top of the ring frame (2), and the axis of the support ring (23) is positioned above the axis of the tank body (1).
5. The automatic heat energy recovery device in the production line for preparing acrylic acid by the propylene oxidation method as claimed in claim 4, wherein: the inner cavity wall of the tank body (1) is filled with a heat insulation layer (16), the heat insulation layer (16) is spliced by adopting heat insulation plates, and the heat insulation layer (16) is attached to the inner wall of the tank body (1).
6. The automatic heat energy recovery device in the production line for preparing acrylic acid by the propylene oxidation method as claimed in claim 5, wherein: a scattering layer (17) is attached to an inner wall cavity of the heat-insulating layer (16), the scattering layer (17) is made of a stainless steel thin plate, and a rough surface is formed on the inner surface of the scattering layer (17) through knocking.
7. The automatic heat energy recovery device in the production line for preparing acrylic acid by the propylene oxidation method as claimed in claim 6, wherein: the connecting rods (21) are fixedly connected between the ring frames (2), the control box (4) is fixedly connected onto the connecting rods (21), the control box (4) is a disc-shaped shell made of heat insulation materials, a circuit board piece is arranged in the control box (4), and a power line of the infrared heating pipe (3) is electrically connected with the circuit board piece in the control box (4).
8. The automatic heat energy recovery device in the production line for preparing acrylic acid by the propylene oxidation method according to claim 7, wherein: the connector (5) is of a tubular structure, and an electrode plug is arranged in the connector (5); the top of the connector (5) is fixedly connected with a connecting table (51) through a bolt, and the top of the connecting table (51) is provided with a jack (52); one side of the top of the tank body (1) is provided with a cable interface (14), a transformer joint (6) is inserted into the cable interface (14), the transformer joint (6) is provided with a conduit (61), the conduit (61) penetrates through the jack (52) and extends into the connector (5), and the caliber of the jack (52) is larger than that of the cable interface (14).
9. The automatic heat energy recovery device in the production line for preparing acrylic acid by the propylene oxidation method according to claim 8, wherein: the top of the connecting table (51) is provided with a boss (53), the top of the boss (53) is provided with an arc surface, the radius of the arc surface at the top of the boss (53) is the same as that of the inner cavity of the tank body (1), and the top of the boss (53) is abutted to the end surface of the inner cavity of the tank body (1).
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788338A (en) * | 2012-03-09 | 2012-11-21 | 威海市锅炉制造厂 | Electrically-heating high-temperature high-pressure steam generator |
| CN203540518U (en) * | 2013-10-30 | 2014-04-16 | 天津市化工设计院 | Device for removing reaction heat generated in acrolein oxidation |
| CN204294210U (en) * | 2014-11-14 | 2015-04-29 | 中国石油集团东北炼化工程有限公司吉林设计院 | Vinylformic acid reactive system |
| CN208193034U (en) * | 2017-12-18 | 2018-12-07 | 冯君仰 | A kind of steam heater |
| CN212157114U (en) * | 2019-12-16 | 2020-12-15 | 联合瑞升（北京）科技有限公司 | Electrode overheating system in industrial steam supply |
-
2021
- 2021-08-25 CN CN202110977877.6A patent/CN113432111B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788338A (en) * | 2012-03-09 | 2012-11-21 | 威海市锅炉制造厂 | Electrically-heating high-temperature high-pressure steam generator |
| CN203540518U (en) * | 2013-10-30 | 2014-04-16 | 天津市化工设计院 | Device for removing reaction heat generated in acrolein oxidation |
| CN204294210U (en) * | 2014-11-14 | 2015-04-29 | 中国石油集团东北炼化工程有限公司吉林设计院 | Vinylformic acid reactive system |
| CN208193034U (en) * | 2017-12-18 | 2018-12-07 | 冯君仰 | A kind of steam heater |
| CN212157114U (en) * | 2019-12-16 | 2020-12-15 | 联合瑞升（北京）科技有限公司 | Electrode overheating system in industrial steam supply |
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