Large reaction kettle top structure
By designing a negative pressure chamber and sealing plate system on the top of the large reactor, the problem of pressure relief valve blockage under high pressure was solved, achieving rapid pressure balance and safe pressure relief inside the reactor, thus avoiding material loss and the occurrence of danger.
Patent Information
- Application Number
- CN202422069094.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2034-08-23
AI Technical Summary
Existing large reactors are prone to clogging of pressure relief valves under high pressure due to foam and material expansion, resulting in material loss and untimely pressure control.
A negative pressure chamber and sealing plate system are designed in the top structure of the reactor. The negative pressure chamber is connected to the inside of the reactor. The negative pressure environment is used to balance the pressure. Combined with a backup pressure relief valve, the pressure relief capacity is enhanced to prevent material loss and blockage.
It achieves rapid pressure balance inside the vessel, avoids the dangers of high pressure, ensures unobstructed pressure relief channels, and reduces the risk of material loss.
Smart Images
Figure CN223901806U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of chemical reactor, specifically is a large -scale reaction kettle top structure. BACKGROUND
[0002] In the chemical workshop, often need to use large -scale reaction kettle to carry out material reaction. Because reaction process is usually more complex, so for the control of reaction is very crucial. Even in the modern DCS control case, dangerous situation of pressure is too high often occurs. When the pressure exceeds threshold value, usually through the pressure table installed on the top of the reaction kettle carries out acquisition feedback, and opens the pressure relief valve automatically through the control system and carries out pressure relief. But based on the reaction can produce a large amount of foam, and the reactant expands along with pressure rise etc. situation, cause the start of pressure relief valve can bring out material or foam, cause material loss, and block the pressure relief valve, cause the danger of pressure control not in time. SUMMARY
[0003] The utility model discloses a large -scale reaction kettle top structure, it can quickly balance the high pressure problem in reaction, reduce and auxiliary control high pressure danger.
[0004] The utility model discloses a large -scale reaction kettle top structure, it can quickly balance the high pressure problem in reaction, reduce and auxiliary control high pressure danger.
[0005] A large -scale reaction kettle top structure, including kettle cover, the bottom side of kettle cover is equipped with the connecting mouth of circular, the annular negative pressure chamber is fixed in kettle cover, the negative pressure chamber is passed through annular bottom plate, outer ring board, inner ring board composition, the annular bottom plate coaxial setting is below kettle cover, the top side of outer ring board is fixed on connecting mouth, the bottom side of outer ring board is fixedly connected with the outer ring of annular bottom plate, the bottom side of inner ring board is fixedly connected with the inner ring of annular bottom plate, the top side of inner ring board is fixedly connected in the upper portion of kettle cover inner wall, be equipped with a plurality of window of with negative pressure chamber intercommunication on inner ring board, rotationally connected with the ring-shaped sealing plate that window is closed on inner ring board, be equipped with with the mouth of overlapping of window on sealing plate.
[0006] One side of kettle cover is equipped with the negative pressure pipe of being connected with negative pressure chamber, the outer end of negative pressure pipe is connected with negative pressure gas source.
[0007] The window is covered with a metal mesh.
[0008] Kettle cover is equipped with the pressure relief pipe of being connected with negative pressure chamber, and the backup pressure relief valve is installed on pressure relief pipe.
[0009] The negative pressure chamber is a coaxial annular cavity with the kettle cover, the inner ring board includes a tapered portion on the upper portion and a straight cylinder portion on the lower portion, the tapered portion is a horn mouth structure with a large upper portion and a small lower portion, the top side of the tapered portion is fixedly connected with the inner wall of the kettle cover, and the window is arranged in the straight cylinder portion region.
[0010] The upper side and the lower side of the straight cylinder part are respectively provided with an annular boss protruding inward, the top side and the bottom side of the sealing plate are respectively connected with the annular boss in a sealing mode through bearing members, the circumferential side of the window is fixed with a sealing strip, and the outer ring surface of the sealing plate is matched with the sealing strip.
[0011] The windows are arranged on the inner ring plate in an annular equidistant mode, the number of the through openings corresponds to the number of the windows, and the minimum distance between the adjacent through openings is greater than the width of the through opening.
[0012] The bottom surface of the annular bottom plate is fixedly provided with a motor, a gear is arranged on the output shaft of the motor, and the bottom side of the sealing plate is fixedly provided with an annular gear ring which is engaged with the gear.
[0013] Compared with the prior art, the utility model has the beneficial effects that:
[0014] By reserving an annular cavity with a closed and negative pressure inner environment, namely a negative pressure cavity, in the covering part, once the pressure in the reaction kettle cannot be timely reduced through the original conventional pressure relief device in a special case, the window can be exposed by rotating the sealing plate, so that the negative pressure cavity is communicated with the reaction kettle, the pressure in the kettle is rapidly balanced, the high pressure on the kettle top is relieved, and a more dangerous situation is avoided. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a side view of the utility model.
[0016] Figure 2 It is a top view of the utility model.
[0017] Figure 3 It is a schematic view of the internal structure of the utility model (the through opening of the sealing plate is overlapped with the window).
[0018] Figure 4 It is a schematic view of the internal structure of the utility model Figure 2 It is a schematic view of the cross-sectional structure of the BB part (the through opening of the sealing plate is overlapped with the window).
[0019] Figure 5 It is a schematic view of the internal structure of the utility model (the through opening of the sealing plate is overlapped with the window).
[0020] Reference signs shown in the drawings:
[0021] 1, kettle cover; 2, connecting flange; 3, negative pressure cavity; 4, annular bottom plate; 5, outer ring plate; 6, inner ring plate; 7, conical part; 8, straight cylinder part; 9, window; 10, annular boss; 11, sealing plate; 12, gear; 13, gear ring; 14, negative pressure pipe; 15, through opening. DETAILED DESCRIPTION
[0022] The utility model discloses below further illustrates the utility model with specific embodiments. It should be understood that these embodiments are only used for illustrating the utility model and are not used for limiting the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the present application.
[0023] The kettle top structure mainly includes kettle cover 1, the kettle cover 1 is used to install at the top of kettle body, the top of kettle cover 1 is arched, the bottom end of kettle cover 1 is equipped with the connecting mouth of circle, the rim of connecting mouth is fixed with the connecting flange 2, the connecting flange 2 is equipped with round hole, is used to realize the fixation with kettle body through bolt.
[0024] The top end of kettle cover 1 is equipped with the mounting seat of fixed communication, the mounting seat is cylindrical, the mounting seat is installed fixedly connected frame, the connecting frame is used to install stirring device and motor etc., the mounting seat is equipped with the isolating sleeve, the isolating sleeve is equipped with rotating shaft seat, and the rotating shaft seat realizes the sealed rotatable installation of stirring shaft. Realize the mixing demand required in reaction.
[0025] The kettle cover 1 is provided with feed inlet, manhole and other structures as required, and is provided with temperature sensor, pressure sensor, pressure relief valve, sampling tube and the like through pipeline.
[0026] The annular negative pressure cavity 3 is fixed to the inner wall of the kettle cover 1, the negative pressure cavity 3 is an annular cavity, the negative pressure cavity 3 is composed of an annular bottom plate 4, an outer ring plate 5 and an inner ring plate 6, the annular bottom plate 4 is coaxially arranged below the kettle cover 1, the top side of the outer ring plate 5 is fixed to the rim of the kettle cover 1, the bottom side of the outer ring plate 5 is fixedly connected to the outer ring of the annular bottom plate 4, the bottom side of the inner ring plate 6 is fixedly connected to the inner ring of the annular bottom plate 4, and the top side of the inner ring plate 6 is fixedly connected to the upper part of the inner wall of the kettle cover 1. Through the above structure, a closed annular cavity is obtained on the cover, which can provide a passage for material feeding and the central position of the stirring shaft, and facilitate the installation of other components without affecting the normal operation.
[0027] The inner ring plate 6 includes a tapered portion 7 extending outwardly from the upper part and a straight cylinder portion 8 at the lower part, and the upper part of the inner ring plate 6 is in a flared structure to provide space for other interfaces on the cover. The straight cylinder portion 8 penetrates a plurality of windows 9, the windows 9 are covered with a metal mesh, and the metal mesh is used to intercept materials and break foams to prevent a large amount of materials from flowing into the windows 9.
[0028] The upper side and the lower side of the straight cylinder part 8 are respectively provided with an annular boss 10 protruding inwardly, and an annular sealing plate 11 is arranged between the annular bosses 10, the top side and the bottom side of the sealing plate 11 are respectively sealedly connected with the annular bosses 10 through bearing members, a sealing strip is fixed on the periphery of the window 9, the outer ring curved surface of the sealing plate 11 is tightly attached to the sealing strip, and the sealing plate 11 is provided with a plurality of through openings 15 corresponding in number and size to the window 9, and the minimum distance between adjacent through openings 15 is greater than the width of the through opening 15,
[0029] When the adjacent through openings 15 of the sealing plate 11 are located at the position of the window 9, the sealing plate 11 seals the window 9, and the negative pressure cavity 3 is a closed cavity.
[0030] When the through opening 15 of the sealing plate 11 overlaps the position of the window 9, the negative pressure cavity 3 is in communication with the inside of the reaction kettle.
[0031] A motor is fixedly installed on the bottom surface of the annular bottom plate 4, a gear 12 is arranged on the output shaft of the motor, an annular gear ring 13 is fixedly arranged on the bottom side of the sealing plate 11, the gear ring 13 is engaged with the gear 12, thereby realizing the control of the rotation of the sealing plate 11, and further realizing the closing or opening of the negative pressure cavity 3 by the sealing plate 11.
[0032] One side of the kettle cover 1 is provided with a negative pressure pipe 14 connected with the negative pressure cavity 3, and the outer end of the negative pressure pipe 14 is connected with a negative pressure gas source for air extraction to form a negative pressure environment in the negative pressure cavity 3, thereby preparing for pressure balance.
[0033] A relief pipe connected with the negative pressure cavity 3 can also be arranged on the kettle cover 1, and a standby relief valve is arranged on the relief pipe, thereby increasing the number of relief valves, and when the main relief valve has a problem or the relief capacity is limited and cannot timely relieve pressure, the standby relief valve is started to supplement the relief.
[0034] Based on the above structure, a closed annular space, i.e. the negative pressure cavity 3, is reserved in advance inside the kettle top, and the negative pressure environment is obtained by air extraction in the closed annular space, when the reaction is normally carried out and the pressure in the reaction kettle can be controlled within a normal range, the space remains closed and does not affect the normal feeding, stirring and reaction, and when a special situation occurs and the pressure in the reaction kettle cannot be timely reduced through the original conventional relief device, the sealing plate 11 is started to rotate to make the through opening 15 overlap the window 9, so that the closing of the negative pressure cavity 3 is changed to opening, thereby instantaneously relieving the high pressure on the kettle top through the reserved negative pressure environment and the expanded space, and thus more dangerous situations can be avoided.
[0035] If the pressure cannot be balanced to the safe range through the expansion space and the supplementary negative pressure environment, the standby pressure relief valve is started to relieve pressure, enhancing the pressure relief capacity. At the same time, based on the setting of the metal mesh at the window 9, the solid material and defoaming can be prevented, so as to ensure that the standby pressure relief valve can operate normally and the pressure relief channel is not blocked.
Claims
1. A large reactor top structure comprising a reactor cover, the bottom side of which is provided with a circular connection opening, characterized in that The annular negative pressure cavity is fixed in the kettle cover, and is composed of an annular bottom plate, an outer ring plate and an inner ring plate.
2. A top structure for a large scale reactor vessel according to claim 1, wherein One side of the kettle cover is provided with a negative pressure pipe connected with the negative pressure cavity.
3. The top structure of a large scale reactor as claimed in claim 1, wherein The window is covered with a metal mesh.
4. The top structure of a large scale reactor as claimed in claim 1, wherein The kettle cover is provided with a pressure relief pipe connected with the negative pressure cavity.
5. The top structure of a large scale reactor as claimed in claim 1, wherein The negative pressure cavity is an annular cavity coaxial with the kettle cover.
6. A top structure for a large scale reactor vessel according to claim 5, wherein The inner ring plate includes a conical portion at the upper part and a straight cylinder portion at the lower part.
7. A top structure for a large scale reactor vessel according to claim 6, wherein The upper side and the lower side of the straight cylinder portion are respectively provided with an inwardly protruding annular boss.
8. A top structure for a large scale reactor vessel as defined in claim 1, wherein The outer ring surface of the outer ring plate is in contact with the inner wall of the kettle cover. The outer ring surface of the outer ring plate is in contact with the inner wall of the kettle cover. The bottom surface of the annular bottom plate is fixedly provided with a motor. The output shaft of the motor is provided with a gear. The bottom side of the sealing plate is fixedly provided with an annular gear ring. The gear ring is engaged with the gear.