CN219032093U - Spray saturator for producing large-particle ammonium sulfate - Google Patents
Spray saturator for producing large-particle ammonium sulfate Download PDFInfo
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- CN219032093U CN219032093U CN202223442296.1U CN202223442296U CN219032093U CN 219032093 U CN219032093 U CN 219032093U CN 202223442296 U CN202223442296 U CN 202223442296U CN 219032093 U CN219032093 U CN 219032093U
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Abstract
The utility model relates to a spray saturator for producing large-particle ammonium sulfate, which comprises an absorption chamber and a crystallization chamber, wherein the absorption chamber is connected with the crystallization chamber up and down, and a downcomer is arranged at the bottom of the absorption chamber and extends into the crystallization chamber; the downcomer is internally provided with a circulating sleeve, the circulating sleeve is in a cylinder shape with an upper opening and a lower opening, the bottom of the circulating sleeve is longer than the downcomer and extends into the crystallization zone, and the bottom of the circulating sleeve is provided with a forced drainage device. According to the utility model, the circulating sleeve is additionally arranged, so that the flow field in the crystallization chamber is orderly optimized, the flow field disorder and short circuit are avoided, the high saturation region at the bottom of the original equipment is eliminated, the generation and growth of crystals and the discharge of acid tar are more favorably controlled, and the obtained crystals are high in quality, large in particle size and uniform in distribution. By additionally arranging the forced flow device, the blockage of the downcomer of the crystallization chamber is effectively avoided, the external circulation mother liquor can be reduced to 30-80% of the original process, and the operation cost is saved.
Description
Technical Field
The utility model relates to a spray saturator for producing large-particle ammonium sulfate.
Background
Spray saturators are a common device for producing ammonium sulfate. The spray saturator mainly comprises an upper absorption chamber and a lower crystallization chamber, which are communicated by a downcomer. The device integrates absorption, separation and crystallization, and has the characteristics of high integration level, small occupied area and low resistance. Because the whole is made of ultra-low carbon stainless steel, the service cycle is long, the maintenance cost is low, the production management is convenient, the method can be used for continuous and large-scale production of ammonium sulfate, and is particularly suitable for removing ammonia in coke oven gas.
In the production process, coke oven gas at the inlet of the spray saturator is uniformly divided into left and right two flows by an annular channel in an upper absorption chamber to flow to the rear part of the equipment, and the left and right two flows are sprayed once by external circulation mother liquor and are recombined after the equipment. And then, continuing to flow to the top of the device through the ascending channel, and after secondary spraying of full-flow mother liquor, entering the inner cylinder along the horizontal tangential direction. In the inner cylinder, coke oven gas spirals downwards to separate fog drops, leaves the saturator through the central outlet pipe and enters the fog catcher, and enters the next unit after fine fog drops are separated again. The middle part of the spray type saturator is provided with a full flow pipe, which mainly plays the roles of keeping the liquid level and sealing the gas. The lower crystallization chamber is communicated with the upper absorption chamber through a downcomer, the bottom crystals of the chamber are pumped to a crystallization tank by a crystallization pump, centrifugally separated and sent to a vibrating fluidized bed dryer by a screw conveyor, dried by a hot air fan and cooled by a cold air fan, and then enter an ammonium sulfate storage hopper to finally finish weighing and packaging and serve as an outer pin of an ammonium sulfate product. After the coking enterprises in China introduce the process from France from the end of the 80 s of the last century, the process is always used as a main process for deaminizing coke oven gas.
Although spray saturators are widely used, there are still practical problems in equipment design. For example: the downcomer in the lower crystallization chamber of the spray saturator is easily blocked by deposited fine ammonium sulfate crystals. In order to avoid the occurrence of the situation, an external circulation pump (a large mother liquor pump) with large flow rate is usually selected to stir the lower part of the crystallization chamber, which can lead to intense turbulence of a flow field in the crystallization chamber, and the formation of obvious concentration gradient is difficult, thus being unfavorable for the formation of high-quality large-particle ammonium sulfate crystals. The increased external circulation mother liquor flow rate also increases the diameter of the liquid discharge pipe, not only aggravates and damages the flow field distribution in the crystallization chamber, but also causes the short circuit of the mother liquor when serious, influences the discharge of acid tar, increases impurities in ammonium sulfate and reduces the quality. In addition, a large amount of external circulation mother liquor also brings higher operation energy consumption. In summary, ammonium sulfate products produced by conventional saturator processes are often contaminated, small and non-uniform in particles, and of poor quality.
In order to solve the problems, chinese patent No. CN206970552U discloses a spray saturator with a transverse mechanical stirring device at the bottom, and the downcomer is still blocked because the downcomer in the device is not optimized. Chinese patent No. CN2796809Y discloses a spray type saturator with liquid stirring at the bottom, and the apparatus is provided with a circulating mother liquor spray pipe at the bottom, and can utilize the sprayed mother liquor to stir the crystallization at the bottom of the crystallization chamber. However, the injection process cannot be controlled, so that a large disturbance is caused to the flow field at the bottom of the crystallization chamber, and the production of large-particle ammonium sulfate products is not facilitated.
Disclosure of Invention
The utility model provides a spray saturator for producing large-particle ammonium sulfate, which improves and upgrades the original spray saturator equipment. Optimizes the structure of the original spray saturator crystallization chamber inner downcomer, adds a circulating sleeve in the downcomer, and arranges a forced mother liquid flowing device in the sleeve.
In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:
the spray saturator for producing large-particle ammonium sulfate comprises an absorption chamber and a crystallization chamber, wherein the absorption chamber is connected with the crystallization chamber up and down, and a downcomer is arranged at the bottom of the absorption chamber and extends into the crystallization chamber; the downcomer is internally provided with a circulating sleeve, the circulating sleeve is in a cylinder shape with an upper opening and a lower opening, the bottom of the circulating sleeve is longer than the downcomer and extends into the crystallization zone, and the bottom of the circulating sleeve is provided with a forced drainage device.
The central axis of the circulating sleeve is coincident with the central axis of the spray saturator and is positioned in the center of the crystallization chamber, so that the effect of guiding the flowing direction of the mother solution is achieved.
The forced drainage device is a jet device.
The forced drainage device is a stirring device.
The forced drainage device is positioned in the center of the circulation sleeve and is used for forcibly providing flowing power for the mother liquor in the circulation sleeve.
The circulating sleeve is cylindrical so as to facilitate the mother liquor to flow through. The material is the same as that of the spray saturator body, and is made of ultra-low carbon stainless steel, including but not limited to S31603, S31683 and the like, and good acid resistance and wear resistance are required to be met. The circulation sleeve is fixed by adopting a welding fastener connection mode.
The absorption chamber comprises an outer cylinder body and an inner cylinder body, an annular channel is arranged between the inner cylinder body and the outer cylinder body, a central outlet pipe is arranged in the inner cylinder body, the lower end of the central outlet pipe is a gas inlet, the upper end of the central outlet pipe is a gas outlet, and the upper part of the side wall of the central outlet pipe is provided with a gas inlet; the annular channel is internally provided with a mother liquor spraying box, the mother liquor spraying box is provided with a mother liquor spray head, the spraying direction of the mother liquor spray head is countercurrent to the flowing direction of the coal gas, and a full-flow mother liquor inlet is arranged above a channel on one side of the coal gas entering the inner cylinder.
The production process is as follows: the mother liquid in the absorption chamber flows into the crystallization chamber from the downcomer, the forced drainage device flows the mother liquid from the bottom of the circulation sleeve to the top along the axial direction, after the mother liquid reaches the top of the circulation sleeve, the mother liquid returns to the bottom along the annular space between the circulation sleeve and the downcomer, and after the mother liquid reaches the bottom again, the mother liquid continues to flow to the top along the annular space between the downcomer and the inner wall of the crystallization chamber again until the mother liquid flows out of the spray saturator from the circulation mother liquid outlet.
The forced flow device makes the flow rate of mother liquor in the circulation sleeve be 0.5-1.5 m/s, and makes the mother liquor in the crystallization chamber flow along the space between the circulation sleeve, downcomer and crystallization chamber inner wall at the flow rate of 0.5-1.5 m/s.
The granularity of the produced ammonium sulfate product is 400-3000 mu m.
The spray saturator is made of ultra-low carbon stainless steel and mainly comprises an absorption chamber at the upper part and a crystallization chamber at the lower part with forced mother liquor flow.
The upper absorption chamber is connected with the lower crystallization chamber through a down-flow pipe with a conical upper end, and mother liquor absorbing ammonia in the coal gas enters the crystallization chamber through the down-flow pipe.
The upper end of the down-flow pipe forms a certain included angle with the outer wall of the absorption chamber, and the formed conical area is convenient for the generated crystal to flow into the crystallization chamber at the lower part.
The upper part of the crystallization chamber is uniformly provided with a plurality of external circulation mother liquor outlets along the circumference so as to avoid the problems of short circuit, bias flow, disturbance and the like of a flow field.
In the actual production process, due to the drainage effect of the circulating sleeve, the mother liquor can flow to the top vertically along the axial direction from the bottom of the circulating sleeve, after reaching the top, the mother liquor can turn back to the bottom along the annular space between the circulating sleeve and the downcomer, after reaching the bottom again, the mother liquor continues to flow to the top again along the annular space between the downcomer and the inner wall of the crystallization chamber until flowing out of the spray saturator from the circulating mother liquor outlet, and the flow mode can not cause the structural disturbance of the flow field, ensure the orderly flow of the mother liquor in the crystallization chamber, be beneficial to forming obvious concentration gradient and be easier to obtain large-particle ammonium sulfate crystals. Due to the blocking effect of the circulating sleeve and the downcomer, the short circuit of the external circulating mother liquor to the flow field in the crystallization chamber is avoided, the discharge efficiency of acid tar is improved, and the quality of ammonium sulfate products is improved.
The forced flow device not only avoids the blockage of the downcomer, but also reduces the flow rate of the externally circulated mother liquor and the energy consumption for operation. A plurality of external circulation mother liquor outlets are uniformly distributed along the upper circumferential area of the crystallization chamber, under the condition that the flow rate of the external circulation mother liquor is unchanged, the number of outlets is increased, so that the flow rate of each outlet can be reduced, and the problems of flow field short circuit, bias flow, disturbance and the like caused by a single mother liquor outlet are further solved. These factors create sufficient conditions for the production of high quality, large particle ammonium sulfate products.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, the circulating sleeve is additionally arranged, so that the flow field in the crystallization chamber is orderly optimized, the flow field disorder and short circuit are avoided, the high saturation region at the bottom of the original equipment is eliminated, the generation and growth of crystals and the discharge of acid tar are more favorably controlled, and the obtained crystals are high in quality, large in particle size and uniform in distribution. By additionally arranging the forced flow device, the blockage of the downcomer of the crystallization chamber is effectively avoided, the external circulation mother liquor can be reduced to 30-80% of the original process, and the operation cost is saved. The spray saturator can obtain ammonium sulfate product with excellent purity, cylinder shape and large particle size (400-3000 microns), and has excellent economic benefit.
Drawings
FIG. 1 is a schematic diagram of a spray saturator for producing large particle ammonium sulfate using a stirring device according to the present utility model;
in the figure: 1. absorption chamber 2, crystallization chamber 3, gas inlet 4, annular channel 5, mother liquor spray tank 6, inner barrel 7, central outlet pipe 8, gas outlet 9, downcomer 10, circulation sleeve 11, stirring device 12, circulation mother liquor outlet 13, circulation mother liquor inlet 14, mother liquor spray head 15, full flow pipe 16, full flow mother liquor inlet 17, tar outlet 18, crystallization outlet 19, centrifuge mother liquor inlet 20, water inlet 21, manhole.
FIG. 2 is a schematic diagram of a spray saturator for producing large particle ammonium sulfate using a fluidic device according to the present utility model;
in the figure: 1. absorption chamber 2, crystallization chamber 3, gas inlet 4, annular channel 5, mother liquor spray tank 6, inner barrel 7, central outlet pipe 8, gas outlet 9, downcomer 10, circulation sleeve 11, fluidics 12, circulation mother liquor outlet 13, circulation mother liquor inlet 14, mother liquor spray head 15, full flow pipe 16, full flow mother liquor inlet 17, tar outlet 18, crystallization outlet 19, centrifuge mother liquor inlet 20, water inlet 21, manhole.
Detailed Description
The present utility model will be described in further detail with reference to the following specific embodiments, but it should not be construed that the scope of the present utility model is limited to the following examples. Various substitutions and alterations are also within the scope of the present utility model, as will be apparent to those skilled in the art and by ordinary skill in the art, without departing from the spirit and scope of the utility model.
Example 1:
as shown in figure 1, the spray saturator for producing large-particle ammonium sulfate comprises an absorption chamber 1 and a crystallization chamber 2, wherein the absorption chamber 1 is connected with the crystallization chamber 2 up and down, and a downcomer 9 is arranged at the bottom of the absorption chamber 1 and extends into the crystallization chamber 2; the downcomer 9 is internally provided with a circulation sleeve 10, the circulation sleeve 10 is in a cylinder shape with an upper opening and a lower opening, the bottom of the circulation sleeve 10 is longer than the downcomer 9 and extends into the crystallization zone, and the bottom of the circulation sleeve 10 is provided with a forced drainage device.
The central axis of the circulation sleeve 10 coincides with the central axis of the spray saturator.
The forced drainage device is a stirring device 11.
The circulation sleeve 10 is cylindrical.
The process comprises the following steps:
the gas to be deaminated enters the annular channel 4 in the absorption chamber 1 from the gas inlet 3 at the upper part of the spray saturator, an annular mother liquor spraying box 5 filled with external circulation mother liquor is arranged above the annular channel 4, and when coke oven gas flows in the annular channel 4, the gas can be sprayed by a plurality of mother liquor spray heads 14 arranged below the mother liquor spraying box 5. After the gas is recombined and sprayed twice through the full flow mother liquor inlet 16, it continues to flow upwards into the inner cylinder 6. Thereafter, the gas is spiraled downwards along the annular channel between the inner cylinder 6 and the central outlet pipe 7. Finally, the water-spraying saturator flows out from the lower part of the central outlet pipe 7 and the coal gas outlet 8 in turn. The mother liquor that has absorbed ammonia from the gas flows through the downcomer 9 into the crystallization chamber 2 in the lower part of the apparatus. The center of the crystallization chamber 2 is provided with a cylindrical circulation sleeve 10, and a stirring device 11 is arranged in the sleeve. The mother liquor in the crystallization chamber 2 flows along the space among the circulation sleeve 10, the downcomer 9 and the inner wall of the crystallization chamber 2 at the flow speed of 0.5-1.5 m/s under the action of stirring power, is pumped out from a plurality of uniformly distributed circulation mother liquor outlets 12 at the upper part of the crystallization chamber 2, is converged with the mother liquor with fine crystals eliminated by a mother liquor heater, and enters the mother liquor spraying box 5 from a circulation mother liquor inlet 13 to circularly spray coal gas. The middle part of the spray saturator is provided with a full flow pipe 15, a tar outlet 17 and a centrifuge mother liquor inlet 19, and the bottom of the crystallization chamber 2 is provided with a crystallization outlet 18. For periodic flushing of the device, several water inlets 20 are provided. For periodic maintenance of the equipment, several manholes 21 are also provided.
The granularity of the produced ammonium sulfate product is 400-3000 mu m.
Example 2:
as shown in figure 2, the spray saturator for producing large-particle ammonium sulfate comprises an absorption chamber 1 and a crystallization chamber 2, wherein the absorption chamber 1 is connected with the crystallization chamber 2 up and down, and a downcomer 9 is arranged at the bottom of the absorption chamber 1 and extends into the crystallization chamber 2; the downcomer 9 is internally provided with a circulation sleeve 10, the circulation sleeve 10 is in a cylinder shape with an upper opening and a lower opening, the bottom of the circulation sleeve 10 is longer than the downcomer 9 and extends into the crystallization zone, and the bottom of the circulation sleeve 10 is provided with a forced drainage device.
The central axis of the circulation sleeve 10 coincides with the central axis of the spray saturator.
The forced drainage device is a jet device 11.
The circulation sleeve 10 is cylindrical.
The process comprises the following steps:
the gas to be deaminated enters the annular channel 4 in the absorption chamber 1 from the gas inlet 3 at the upper part of the spray saturator, an annular spraying box 5 filled with external circulation mother liquor is arranged above the annular channel 4, and when coke oven gas flows in the annular channel 4, the gas can be sprayed by a plurality of mother liquor spray heads 14 arranged below the annular spraying box 5. After the gas is recombined and sprayed twice through the full flow mother liquor inlet 16, it continues to flow upwards into the inner cylinder 6. Thereafter, the gas is spiraled downwards along the annular channel between the inner cylinder 6 and the central outlet pipe 7. Finally, the gas flows out of the spray saturator from the gas inlet and the gas outlet 8 at the lower part of the central outlet pipe 7 in sequence. The mother liquor that has absorbed ammonia from the gas flows through the downcomer 9 into the crystallization chamber 2 in the lower part of the apparatus. The center of the crystallization chamber 2 is provided with a cylindrical circulation sleeve 10, and a jet device 11 is arranged in the sleeve. Under the action of the sprayed mother liquor, the mother liquor in the crystallization chamber 2 flows along the space among the circulation sleeve 10, the downcomer 9 and the inner wall of the crystallization chamber 2 at the flow rate of 0.5-1.5 m/s, is pumped out from a plurality of uniformly distributed circulation mother liquor outlets 12 at the upper part of the crystallization chamber 2, is converged with the mother liquor with fine crystals eliminated by a mother liquor heater, and enters the mother liquor spraying box 5 from a circulation mother liquor inlet 13 to circularly spray coal gas. The middle part of the spray saturator is provided with a full flow pipe 15, a tar outlet 17 and a centrifuge mother liquor inlet 19, and the bottom of the crystallization chamber 2 is provided with a crystallization outlet 18. For periodic flushing of the device, several water inlets 20 are provided. For periodic maintenance of the equipment, several manholes 21 are also provided.
The granularity of the produced ammonium sulfate product is 400-3000 mu m.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (7)
1. The spray saturator for producing large-particle ammonium sulfate comprises an absorption chamber and a crystallization chamber, wherein the absorption chamber is connected with the crystallization chamber up and down, and a downcomer is arranged at the bottom of the absorption chamber and extends into the crystallization chamber; the device is characterized in that a circulating sleeve is arranged in the downcomer, the circulating sleeve is in a cylinder shape with an upper opening and a lower opening, the bottom of the circulating sleeve is longer than the downcomer and extends into the crystallization zone, and a forced drainage device is arranged at the bottom of the circulating sleeve.
2. A spray saturator for producing large particles of ammonium sulfate according to claim 1 wherein the central axis of the circulation sleeve coincides with the central axis of the spray saturator.
3. The spray saturator for producing large-particle ammonium sulfate according to claim 1, wherein the forced drainage device is a jet device.
4. The spray saturator for producing large-particle ammonium sulfate according to claim 1, wherein the forced drainage device is a stirring device.
5. A spray saturator for producing large particles of ammonium sulfate according to claim 1 wherein the circulation sleeve is cylindrical.
6. A spray saturator for producing large-particle ammonium sulfate according to claim 1, wherein the upper part of the crystallization chamber is provided with a plurality of circulating mother liquor outlets uniformly distributed along the circumference.
7. The spray saturator for producing large-particle ammonium sulfate according to claim 1, wherein the absorption chamber comprises an outer cylinder body and an inner cylinder body, an annular channel is arranged between the inner cylinder body and the outer cylinder body, a central outlet pipe is arranged in the inner cylinder body, the lower end of the central outlet pipe is a gas inlet, the upper end of the central outlet pipe is a gas outlet, and the upper part of the side wall of the central outlet pipe is provided with a gas inlet; the annular channel is internally provided with a mother liquor spraying box, the mother liquor spraying box is provided with a mother liquor spray head, the spraying direction of the mother liquor spray head is countercurrent to the flowing direction of the coal gas, and a full-flow mother liquor inlet is arranged above a channel on one side of the coal gas entering the inner cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223442296.1U CN219032093U (en) | 2022-12-22 | 2022-12-22 | Spray saturator for producing large-particle ammonium sulfate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223442296.1U CN219032093U (en) | 2022-12-22 | 2022-12-22 | Spray saturator for producing large-particle ammonium sulfate |
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| CN219032093U true CN219032093U (en) | 2023-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223442296.1U Active CN219032093U (en) | 2022-12-22 | 2022-12-22 | Spray saturator for producing large-particle ammonium sulfate |
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| CN (1) | CN219032093U (en) |
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