CN218795808U - Urea converter with waveform tower tray - Google Patents
Urea converter with waveform tower tray Download PDFInfo
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- CN218795808U CN218795808U CN202223188968.0U CN202223188968U CN218795808U CN 218795808 U CN218795808 U CN 218795808U CN 202223188968 U CN202223188968 U CN 202223188968U CN 218795808 U CN218795808 U CN 218795808U
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- disc plate
- tray
- air chamber
- disc
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
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Abstract
The utility model provides a urea converter with wave form tower tray, relate to urea converter technical field, the technical scheme who adopts includes the barrel and sets up the multilayer tower tray in the barrel, multilayer tower tray sets gradually along the direction of height of barrel, the border and the barrel inner wall clearance fit of tower tray, the tower tray is formed by a plurality of plate splices, the plate includes the convex air chamber that makes progress, the baffle of setting in the air chamber both sides, a plurality of material holes of setting on the baffle and a plurality of gas pockets of setting on the air chamber, one side that the air chamber was kept away from to the baffle is provided with the connecting plate, the connecting plate releasable connection of two adjacent plate. The utility model discloses between border and the barrel inner wall of tower trayThe clearance fit is realized, and the annular clearance is cancelled to avoid back mixing; the gas chamber structure is adopted, the specific surface area of bubbles is increased, the gas dispersion is promoted, the contact and mass transfer of gas-liquid two phases are enhanced, and the reaction efficiency and CO are increased 2 The conversion rate reduces the steam consumption and the cost; the tower tray is formed by splicing a plurality of tray plates, and the connecting plate is detachably connected, so that the tower tray is convenient to install.
Description
Technical Field
The utility model relates to a urea converter technical field especially relates to a urea converter with wave form tower tray.
Background
The synthesis tower is the key equipment in the urea preparation plant, and the tower tray is the equipment part for distributing the reaction materials in the urea synthesis process. The tower tray used at present is a porous sieve tray, the main function is to prevent the material from back mixing, the diameter of the tower tray is smaller than the inner diameter of the cylinder, an annular gap (for short, an annular gap) is formed between the tower tray and the cylinder, so that liquid can circulate, and a plurality of air holes are arranged on the sieve plate. After the synthesis tower is used for many years, the inner diameter of the synthesis tower is irregular due to uneven lining, the annular space of a tower tray is irregular, liquid flows form turbulence, back mixing is easy to cause, the carbon dioxide conversion rate is low and is maintained at about 58% throughout the year, meanwhile, the steam consumption is high, and improvement is needed.
SUMMERY OF THE UTILITY MODEL
To the problem that among the prior art scheme perforated plate tray carbon dioxide conversion rate is lower, steam consumption is big, the utility model provides a urea converter with wave form tower tray.
The utility model provides a following technical scheme: the utility model provides a urea converter with wave form tower tray, includes barrel and the multilayer tower tray of setting in the barrel, and the multilayer tower tray sets gradually along the direction of height of barrel, the border and the barrel inner wall clearance fit of tower tray, the tower tray is formed by a plurality of plate splices, the plate includes upwards convex air chamber, sets up baffle, a plurality of material holes of setting on the baffle and a plurality of gas pockets of setting on the air chamber in air chamber both sides, one side that the air chamber was kept away from to the baffle is provided with the connecting plate, the connecting plate releasable connection of two adjacent plate.
Preferably, the barrel is cylindrical, the plate is formed by splicing a first plate, a second plate, a third plate, a fourth plate and a fifth plate, air chambers of the first plate, the second plate and the third plate are communicated, one sides of the first plate and the second plate, which face each other, of the second plate and the third plate, which face each other, are respectively provided with a connecting plate, the connecting plates of the two adjacent plates are detachably connected, the fourth plate is detachably connected to both sides of the first plate, the fourth plate, the second plate and the third plate are detachably connected, and the fifth plate is detachably connected to one side of the fourth plate, which is far away from the first plate.
Preferably, the second plate and the third plate are provided with semicircular grooves towards each other, the two semicircular grooves form a cylindrical material channel, and the bottom of the material channel extends to be flush with the baffle.
Preferably, the inner wall of the cylinder body is provided with a plurality of supporting plates, bolt holes are formed in the supporting plates and the disc plates, and the supporting plates are connected with the disc plates through bolts.
Preferably, the bolt holes of the plate are strip-shaped holes.
Preferably, the total number of gas holes of the tray with the higher height on any two adjacent trays is less than or equal to the total number of gas holes of the tray with the lower height.
Preferably, a plurality of the air holes are distributed in a diamond shape on the surface of the air chamber.
Preferably, the air chamber is an inverted V-shaped groove.
The beneficial effects of the utility model are that: the edge of the tower tray is in clearance fit with the inner wall of the cylinder, and the annular gap is eliminated to avoid back mixing; the gas chamber structure is adopted, the specific surface area of bubbles is increased, the gas dispersion is promoted, the contact and mass transfer of gas-liquid two phases are enhanced, and the reaction efficiency and CO are increased 2 The conversion rate of the process reduces the steam consumption and the cost; tower with a tower bodyThe disc is formed by splicing a plurality of disc plates, and the connecting plates are detachably connected, so that the disc is convenient to install.
Drawings
Fig. 1 is a top view of an embodiment of a tray in the present invention.
Fig. 2 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 1.
Fig. 3 is a side view of an embodiment of the mid-tray plate of the present invention.
Fig. 4 is a top view of an embodiment of a third tray panel of the present invention.
Reference numerals: 10-cylinder, 11-supporting plate, 20-disc plate, 21-air chamber, 22-baffle, 23-material hole, 24-air hole, 25-connecting plate, 26-material channel, 201-first disc plate, 202-second disc plate, 203-third disc plate, 204-fourth disc plate, 205-fifth disc plate.
Detailed Description
The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings and reference numerals, so that those skilled in the art can implement the embodiments after studying the specification. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The utility model provides a urea synthesizing tower with a wave-shaped tower tray, which comprises a cylinder body 10 and a plurality of layers of tower trays arranged in the cylinder body 10, and is shown in figures 1 to 4. The main function of the urea synthesis tower is to remove NH 3 And CO 2 The ammonium carbamate reacts at high temperature and high pressure to generate ammonium carbamate, the ammonium carbamate is dehydrated to generate urea, the cylinder body 10 can be made of ultra-low carbon, nickel, chromium and molybdenum alloys which bear high temperature and high pressure and are corrosion-resistant, a gas-liquid two-phase mixed material flows from bottom to top along the axial direction of the cylinder body 10, and the gas phase and the liquid phase coexist all the time in the reaction process. The multiple trays are arranged in order in the height direction of the cylinder 10 and divide the synthesis column into a plurality of small reaction chambers connected in series. The tray can be made of 00Cr25Ni22Mo2 alloy.
The edge of the tray is in clearance fit with the inner wall of the cylinder 10, and the annular gap in the prior art is eliminated. The tray is formed by splicing a plurality of tray plates 20, each tray plate 20 comprises an upward convex air chamber 21, baffle plates 22 arranged on two sides of the air chamber 21, a plurality of material holes 23 arranged on the baffle plates 22 and a plurality of air holes 24 arranged on the air chamber 21, one side of each baffle plate 22 far away from the air chamber 21 is provided with a connecting plate 25, and the connecting plates 25 of the two adjacent tray plates 20 are detachably connected.
The chamber 21 is of a trough-like configuration, opening towards the bottom of the synthesis column. The aperture of the air hole 24 is generally smaller than that of the material hole 23, the aperture of the material hole 23 can be 8 mm, and the aperture of the air hole 24 can be 5 mm. In the reaction chamber at the lower part of a certain tower tray, the liquid phase in the material flows to the reaction chamber at the upper part of the tower tray from the material hole 23 on the baffle plate 22; the gas phase is dispersed in the liquid phase in the form of bubbles, the bubbles are gradually gathered in the gas chamber 21 in the flowing process, then the gas is ejected out of the gas holes 24 on the gas chamber 21 to the liquid phase of the reaction chamber on the upper part of the tray at high speed under the action of pressure, the formed bubbles are smaller, the specific surface area is increased, the gas dispersion is promoted, the contact and mass transfer of the gas phase and the liquid phase are enhanced, the reaction efficiency is increased, meanwhile, the annular gap is cancelled, and the back mixing caused by the backflow of materials from the reaction chamber on the upper part of the tray to the reaction chamber on the lower part is avoided. Compared with the prior art, CO 2 The conversion rate of the catalyst is improved from 58 percent to over 60 percent, and CO 2 The conversion rate is improved by 1 percentage point, about 40kg of medium-high pressure steam can be saved in each ton of urea, the steam saving amount is about 20800 tons/year according to the current annual output of the urea of 520000 tons/year, the steam cost is calculated according to 180 yuan/ton, the cost of the urea can be saved by 374.4 ten thousand yuan per year, and the benefit is considerable. Furthermore, the tower tray is installed in a mode that a plurality of tray plates are detachably connected with a connecting plate, so that the installation is more convenient.
Preferably, the cylinder 10 is cylindrical, the disc plate 20 is formed by splicing a first disc plate 201, a second disc plate 202, a third disc plate 203, a fourth disc plate 204 and a fifth disc plate 205, the air chambers of the first disc plate 201, the second disc plate 202 and the third disc plate 203 are communicated, one side of the first disc plate 201 and one side of the second disc plate 202 facing each other, one side of the second disc plate 202 and one side of the third disc plate 203 facing each other are provided with connecting plates 25, the connecting plates 25 of two adjacent disc plates 20 are detachably connected, the fourth disc plate 204 is detachably connected to both sides of the first disc plate 201, the fourth disc plate 204 is detachably connected to the second disc plate 202 and the third disc plate 203, and one side of the fourth disc plate 204 facing away from the first disc plate 201 is detachably connected to the fifth disc plate 205.
Preferably, this embodiment is provided with 15 layers of trays, and in the top-down 1-10 layers of trays, the sides of the second tray plate 202 and the third tray plate 203 facing each other are provided with semicircular grooves, two semicircular grooves form a cylindrical material channel 26, and the bottom of the material channel 26 extends to be flush with the baffle plate 22, so that the liquid phase can flow more easily without affecting the dispersion of the gas phase. In 11 to 15 layers of tower trays, the material channel 26 is not arranged.
Preferably, a plurality of supporting plates 11 are arranged on the inner wall of the cylinder 10, bolt holes are arranged on both the supporting plates 11 and the disc plates 20, and the supporting plates 11 are connected with the disc plates 20 through bolts. The bolt holes of the plate 20 are strip-shaped holes, so that the plate is convenient to adjust when being installed.
Preferably, on any two adjacent trays, the total number of the pores 24 of the tray with the higher height is less than or equal to the total number of the pores 24 of the tray with the lower height, the gas-phase flow at the bottom of the synthesis tower is larger, and the gas-phase flow gradually decreases along with the reaction, and the number of the pores in the trays of 1 st to 5 th, 6 th to 7 th, 8 th to 10 th, 11 th to 12 th, 13 th to 14 th and 15 th layers is 1523, 1722, 2213, 2584, 2792 and 3465 in sequence from top to bottom in the embodiment.
Preferably, a plurality of the air holes 24 are distributed in a diamond shape on the surface of the air chamber 21, and the density of the air holes 24 can be changed by adjusting the distance a between two adjacent rows of the air holes 24.
Preferably, the air chamber 21 is an inverted V-shaped groove.
The foregoing is directed to one or more embodiments of the present invention, which are described in some detail and detail, but are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (8)
1. A urea synthesis tower with a waveform tray comprises a cylinder (10) and a plurality of layers of trays arranged in the cylinder (10), wherein the layers of trays are sequentially arranged along the height direction of the cylinder (10), and the urea synthesis tower is characterized in that: the border and barrel (10) inner wall clearance fit of tray, the tray is formed by a plurality of dish boards (20) concatenation, dish board (20) are including upwards convex air chamber (21), set up baffle (22) in air chamber (21) both sides, set up a plurality of material holes (23) on baffle (22) and set up a plurality of gas pockets (24) on air chamber (21), one side that air chamber (21) were kept away from in baffle (22) is provided with connecting plate (25), connecting plate (25) releasable connection of two adjacent dish boards (20).
2. A urea synthesis column with corrugated trays according to claim 1, characterized in that: the cylinder (10) is cylindrical, the disc plate (20) is formed by splicing a first disc plate (201), a second disc plate (202), a third disc plate (203), a fourth disc plate (204) and a fifth disc plate (205), air chambers of the first disc plate (201), the second disc plate (202) and the third disc plate (203) are communicated, one sides of the first disc plate (201) and the second disc plate (202) facing each other, and one sides of the second disc plate (202) and the third disc plate (203) facing each other are provided with connecting plates (25), the connecting plates (25) of two adjacent disc plates (20) are detachably connected, the two sides of the first disc plate (201) are respectively detachably connected with a fourth disc plate (204), the second disc plate (202) and the third disc plate (203) are detachably connected, and one side, away from the first disc plate (201), of the fourth disc plate (204) is detachably connected with a fifth disc plate (205).
3. A urea synthesis column with corrugated trays according to claim 2, characterized in that: one sides of the second plate (202) and the third plate (203) facing each other are respectively provided with a semicircular groove, the two semicircular grooves form a cylindrical material channel (26), and the bottom of the material channel (26) extends to be flush with the baffle (22).
4. A urea synthesis column with wave trays according to claim 1, characterized in that: the inner wall of the barrel body (10) is provided with a plurality of supporting plates (11), bolt holes are formed in the supporting plates (11) and the plate plates (20), and the supporting plates (11) are connected with the plate plates (20) through bolts.
5. A urea synthesis column with corrugated trays according to claim 4, characterized in that: the bolt holes of the plate (20) are strip-shaped holes.
6. A urea synthesis column with corrugated trays according to claim 1, characterized in that: the total number of the gas holes (24) of the tray with the higher height on any two adjacent trays is less than or equal to the total number of the gas holes (24) of the tray with the lower height.
7. A urea synthesis column with wave trays according to claim 1, characterized in that: the air holes (24) are distributed on the surface of the air chamber (21) in a diamond shape.
8. A urea synthesis column with wave trays according to claim 1, characterized in that: the air chamber (21) is an inverted V-shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223188968.0U CN218795808U (en) | 2022-11-30 | 2022-11-30 | Urea converter with waveform tower tray |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223188968.0U CN218795808U (en) | 2022-11-30 | 2022-11-30 | Urea converter with waveform tower tray |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218795808U true CN218795808U (en) | 2023-04-07 |
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ID=87270244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223188968.0U Active CN218795808U (en) | 2022-11-30 | 2022-11-30 | Urea converter with waveform tower tray |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218795808U (en) |
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2022
- 2022-11-30 CN CN202223188968.0U patent/CN218795808U/en active Active
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