Carbonization tower comprising mushroom-shaped caps and sieve plates

Abstract

A carbonization tower comprising mushroom-shaped caps (3) and sieve plates (2), relating to the technical field of sodium carbonate production. The carbonization tower comprises a tower body (1), wherein a tower plate is arranged in the tower body (1) in the axial direction thereof, and the tower plate comprises the sieve plates (2) and the mushroom-shaped caps (3) which are arranged in the tower body; the number of the sieve plates is 5-12, sieve holes are arranged in each sieve plate (2), the aperture ratio range of the sieve holes is 0.15%-5%, the aperture ratio is increased from top to bottom in the axial direction of the tower body, and the aperture of the sieve holes is 8 mm-60 mm; the sieve plates (2) are provided with downcomers (4), the number of the downcomers (4) is 1-5, and the downcomers (4) of every two adjacent sieve plates (2) are not on a same vertical line; and the number of the mushroom-shaped caps (3) is 3-20. By employing the sieve plates (2) having a low aperture ratio and provided with the downcomers (4), the gas-liquid contact area is increased, and the absorption efficiency of the tower is improved; and the blockage of the tower plate is effectively avoided by the mushroom-shaped caps.

Description

Carbonation tower with caps and sieve plates TECHNICAL FIELD

[0001] The utility model belongs to soda production technical field, especially relates to a carbonation tower with caps and sieve plates. BACKGROUND

[0002] Soda is one of important chemical raw materials, is widely used in glass, daily chemical, chemical industry, enamel, papermaking, medicine, weaving, printing and dyeing, tanning and other industrial departments and people's daily life, and occupies an important position in national economy.

[0003] Carbonation tower is the main equipment of soda production. In the tower, mass transfer, crystallization and heat transfer processes are carried out simultaneously, and there are gas-liquid-solid three phases, many factors affect the working quality and production capacity. Due to the existence of gas-liquid-solid three phases in the carbonation process, the structure requires good contact between gas-liquid two phases, and the generated solid does not sink to block the gas-liquid channel and take away a large amount of reaction heat in time.

[0004] The prior art tower body above water tank only uses sieve plate or cap, if only sieve plate is used, the crystallization section is easy to block, and if only cap is used, the absorption efficiency is low. Therefore, a device needs to be developed to solve the above problems. Utility model content

[0005] The utility model aims at meeting the actual demand, provides a carbonation tower with caps and sieve plates, puts forward reasonable parameter setting and structural features of cap and sieve plate, and guarantees that the carbonation process is carried out efficiently and stably.

[0006] In order to realize the above-mentioned utility model purposes, the utility model aims at providing a carbonation tower with caps and sieve plates, comprising a tower body, a tower plate is arranged in the tower body along the axial direction, the tower plate comprises a sieve plate and a cap arranged in the tower body; the number of sieve plates is 5-12, sieve holes are arranged on the sieve plate, the opening rate of the sieve hole ranges from 0.15% to 5%, the opening rate gradually increases from top to bottom along the axial direction of the tower body, and the aperture of the sieve hole ranges from 8mm to 60mm; a downcomer is arranged on the sieve plate, the number of downcomers ranges from 1 to 5, and the downcomers of adjacent sieve plates are not on the same vertical line; the number of caps ranges from 3 to 20.

[0007] In the above-mentioned scheme of the carbonation tower with caps and sieve plates, the sieve plate and the cap are arranged in the tower body.

[0008] In the above-mentioned scheme of the carbonation tower with caps and sieve plates, the sieve plate is located in the upper section of the tower body, and the cap is located in the middle and lower section of the tower body.

[0009] In the above-mentioned scheme of the carbonation tower with caps and sieve plates, the sieve holes on the sieve plate are uniformly distributed.

[0010] In the carbonization tower with the cap and the sieve plate, the liquid downcomer arranged on the sieve plate is not on the same vertical line.

[0011] In the carbonization tower with the cap and the sieve plate, the cap comprises an upper disc and a lower disc arranged at the lower part of the upper disc, the lower disc is fixed on the tower body, a plurality of through holes are arranged on the lower disc, and the upper disc and the lower disc are connected through a rib plate.

[0012] The application has the advantages and positive effects that: (1) the combination of the sieve plate with different opening rates and the liquid downcomer and the cap improves the absorption efficiency of the tower, reduces the consumption of the gas raw material carbon dioxide, and saves the cost; (2) the opening rate of the sieve plate in the tower body increases from top to bottom, the residence time of the reactants on the sieve plate is reduced, and the generation of the crystals is reduced; (3) the cap is adopted, the design of the cap provides a longer gas-liquid phase channel, is beneficial to the uniform distribution of the liquid, avoids the flow deviation, and effectively avoids the blockage of the tower plate, thereby improving the generation efficiency of the sodium bicarbonate and the crystallization quality, and ensuring the high efficiency and stability of the production; (4) the application is used in actual production, greatly improves the CO2 absorption rate, and does not occur the crystallization blockage, the production is stably operated, and the production demand is met. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0014] Fig. 1 shows a structure schematic diagram of a carbonization tower with a cap and a sieve plate according to an embodiment of the application.

[0015] In the figure, 1 is a tower body, 2 is a sieve plate, 3 is a cap, 4 is a liquid downcomer, 5 is an upper disc, and 6 is a lower disc. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the application will be described clearly and completely in the following with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only some embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.

[0017] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict.

[0018] All numerical identifiers, such as temperatures, lengths, flow rates, including ranges, are approximate values, although it is not always expressly stated that all numerical identifiers are preceded by the term "about."

[0019] For ease of description, spatially relative terms, such as "upper", "lower", "left", "right", and the like, are used in the description to illustrate the relationships between one element or feature and another element or feature in the drawings. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation, in addition to the orientations depicted in the drawings. For example, if the device is inverted, elements described as being "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or located in any other orientation) and the spatially relative descriptors used herein interpreted accordingly. Unless otherwise noted, the meaning of "a" or "an" includes two or more.

[0020] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be internal communication of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0021] Please refer to figure 1, the first embodiment

[0022] The carbonization tower with the cap and the sieve plate comprises a tower body 1, a tower plate is arranged in the axial direction of the tower body 1, the tower plate comprises a sieve plate 2 and a cap 3 arranged on the tower body, the two kinds of tower plates are combined for use, which is beneficial to guarantee the absorption rate of gas, it needs to be explained that the utility model does not specifically limit the combination mode of the cap and the sieve plate, the sieve plate and the cap can be arranged in the tower body with intervals, or the sieve plate can be arranged in the upper section of the tower body, and the cap can be arranged in the middle and lower section of the tower body, or the sieve plate and the cap can be distributed randomly as required, and the purpose of the application can be achieved.

[0023] The opening rate and the aperture of the sieve plate are specifically set according to the number of generated crystals, the absorption rate of gas can be guaranteed, and the crystals can be effectively prevented from being blocked.

[0024] The number of sieve plates 2 is 5-12, such as 5 or 8 or 12, and the sieve plates can disperse the liquid phase into bubbles, increase the gas-liquid contact area, and improve the absorption efficiency; the number of sieve plates cannot be too large, otherwise the distance between the sieve plates will be too close, and a small amount of liquid will be directly taken to the upper layer of the sieve plate by the gas, causing back mixing of the liquid phase, reducing the reaction rate, increasing energy consumption, and reducing the utilization rate of the equipment; the sieve plate 2 is provided with sieve holes, and the opening rate of the sieve holes is 0.15%-5%, such as 0.5% or 2.5% or 4%; the opening rate gradually increases from top to bottom along the axial direction of the tower, and the diameter of the sieve holes is 8-60 mm, such as 8 mm or 34 mm or 60 mm; the opening rate and the diameter of the sieve holes are set according to the amount of crystal generated, which can effectively prevent the crystal from being blocked while ensuring the gas absorption rate; in practice, different settings need to be made according to the actual situation, among which the opening rate gradually increases from top to bottom along the axial direction of the tower, that is, in order to reduce the possibility of crystallization; it should be noted that the opening rate of the upper section of the tower does not necessarily have to be 0.15% or other values near it, as long as it is within the range and meets the principle of increasing from top to bottom; similarly, the maximum opening rate does not necessarily have to be 5% or other values near it; different opening rates and diameters improve the strength and stability of the sieve plate, making the structure more compact to withstand greater pressure and improve the stability and life of the sieve plate; reasonable setting of the diameter and opening rate of the sieve holes can better bubble the liquid phase, increase the gas-liquid contact area, and ensure the efficiency of gas absorption; the sieve plate is provided with a downcomer 4, and the number of downcomers 4 is 1-5, such as 1 or 3 or 5, and setting multiple downcomers 4 can increase the load and flow rate of the sieve plate; the downcomers 4 of adjacent sieve plates 2 are not on the same vertical line, that is, the downcomers are distributed staggered, which can reduce the effect of gas phase back mixing between the plates, while maintaining a certain residence time of the liquid on the sieve plate; the number of caps 3 is 3-20, such as 3 or 11 or 20, and the caps have a large specific surface area, which can provide more gas-liquid contact area, improve the mass transfer efficiency, and the caps can achieve uniform liquid distribution, avoiding the phenomenon of uneven flow, the caps have a large porosity, reducing the occurrence of hole blocking, and can improve the generation efficiency of sodium bicarbonate and the quality of the crystal; the number of caps is set in combination with the size of the tower diameter, the temperature and pressure during operation, etc., to ensure the normal operation of the carbonation tower while improving the production capacity of the carbonation tower.

[0025] Based on the device of the first embodiment, the sieve holes on the sieve plate 2 are uniformly distributed, which ensures that the material is uniformly dispersed on the sieve plate, reduces the accumulation and blocking of the material, and thus improves the processing capacity and processing speed of the gas phase and the liquid phase.

[0026] The downcomers 4 provided on the interphase sieve plate 2 are not on the same vertical line, which can fully achieve the purpose of changing the flow direction and speed of the liquid phase, thereby improving the separation efficiency of the sieve plate.

[0027] The cap includes an upper disc 5 and a lower disc 6 arranged at the lower part of the upper disc 5, the lower disc 6 is fixed on the tower body 1, a plurality of through holes are arranged on the lower disc 6, and the upper disc 5 and the lower disc 6 are connected through a web plate; the cap creates a tortuous path for gas-liquid two-phase, provides a maximum contact area and a long channel, the gas phase passes through the through holes of the lower disc 6, and the crystallization does not accumulate on the lower disc, so that the cap is not easy to be blocked.

[0028] Based on the foregoing embodiment, the liquid phase is from top to bottom, the gas phase is from bottom to top, the tower body section where the sieve plate is arranged, the gas is contacted with the liquid in the rising process, the two-phase mixing is formed, the carbon dioxide raw material in the gas is absorbed, and the sodium bicarbonate crystallization is formed; when the liquid falls to the lower part of the carbonation tower, the temperature of the taken liquid is controlled by controlling the cooling water flow, temperature and the like, and the sodium bicarbonate crystallization is precipitated.

[0029] Based on the foregoing embodiment, the carbonation tower with the cap and the sieve plate is applied to produce soda ash in actual production, 5 sieve plates and 20 caps are arranged, the CO2 tail gas content is reduced from 8% of the traditional carbonation to below 3%, the average particle size of the crystallization is in the range of 120-140 um, the stable operation of the device for 8000 hours is realized, and the product demand is met.

[0030] Based on the foregoing device, the reasonable parameter setting and the structural features of the cap and the sieve plate ensure that the carbonation process is efficiently and stably carried out.

[0031] The above only describes preferred embodiments of the present application, and it should be pointed out that, for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A carbonization tower comprising a cap and a sieve plate, characterized in that: The tower body (1) comprises a tower plate arranged in the tower body (1) along its axial direction, wherein the tower plate comprises a sieve plate (2) and a mushroom cap (3) arranged in the tower body; the number of the sieve plates (2) is 5 to 12, the sieve plates (2) are provided with sieve holes, the opening rate of the sieve holes ranges from 0.15% to 5%, the opening rate gradually increases from top to bottom along the axial direction of the tower body, and the aperture of the sieve holes ranges from 8 mm to 60 mm; the sieve plates are provided with downcomers (4), the number of the downcomers (4) is 1 to 5, and the downcomers (4) of adjacent sieve plates (2) are not on the same vertical line; the number of the mushroom caps (3) is 3 to 20.

2. The carbonization tower comprising a cap and a sieve plate according to claim 1, characterized in that: The sieve plate (2) and the mushroom cap (3) are arranged in the tower body at intervals.

3. The carbonization tower comprising a cap and a sieve plate according to claim 1, characterized in that: The sieve plate (2) is located at the upper section of the tower body (1), and the mushroom cap (3) is located at the middle and lower section of the tower body (1).

4. The carbonization tower comprising a cap and a sieve plate according to claim 1, characterized in that: The sieve holes on the sieve plate (2) are evenly distributed.

5. The carbonization tower comprising a cap and a sieve plate according to claim 1, characterized in that: The downcomers (4) provided on the interlaced sieve plates (2) are not on the same vertical line.

6. The carbonization tower comprising a cap and a sieve plate according to claim 1, characterized in that: The mushroom cap comprises an upper plate (5) and a lower plate (6) arranged at the lower part of the upper plate (5); the lower plate (6) is fixed on the tower body (1); a plurality of through holes are opened on the lower plate (6); the upper plate (5) and the lower plate (6) are connected by a rib plate.

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