CN218653061U - External crystallization auxiliary device of ammonium sulfate - Google Patents
External crystallization auxiliary device of ammonium sulfate Download PDFInfo
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- CN218653061U CN218653061U CN202222775278.9U CN202222775278U CN218653061U CN 218653061 U CN218653061 U CN 218653061U CN 202222775278 U CN202222775278 U CN 202222775278U CN 218653061 U CN218653061 U CN 218653061U
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Abstract
The utility model relates to a coke oven gas ammonia retrieves technical field, especially relates to an external crystallization auxiliary device of ammonium sulfate. The device comprises an external crystallization tank, an external crystallization tank circulating pump, an external crystallization tank liquid level meter, an adjusting valve and a flowmeter; an ammonium sulfate slurry pipeline at the outlet of the ammonium sulfate crystallization tank of the saturator is provided with a first branch pipeline connected with the inlet of the external crystallization tank, and a regulating valve and a flowmeter are arranged on the first branch pipeline; an ammonium sulfate mother liquor pipeline at the inlet of the ammonium sulfate crystallization tank of the saturator is provided with a second branch pipeline connected with the inlet of the external crystallization tank; the external crystallization tank liquid level meter is arranged on the external crystallization tank; an inlet of the external crystallization tank circulating pump is connected with the first pipeline through a pipeline, and an outlet of the external crystallization tank circulating pump is connected with the external crystallization tank through a pipeline. The residual ammonium sulfate crystals which cannot be timely processed by the ammonium sulfate crystallization tank of the saturator are sent into the external crystallization tank, so that space is provided for the continuous growth of the crystals, the crystallization time is prolonged, and the product quality is ensured while the crystallization processing amount is increased.
Description
Technical Field
The utility model relates to a coke oven gas ammonia retrieves technical field, especially relates to an external crystallization auxiliary device of ammonium sulfate.
Background
In the process of gas purification, ammonia in the gas is absorbed by sulfuric acid to prepare ammonium sulfate, which is one of important chemical products produced in large scale in a coking plant.
Most large-scale coking plants in China adopt a saturator method to produce ammonium sulfate. The plant throughput of the saturator is generally determined by the gas throughput. The yield of ammonium sulfate is influenced by the gas treatment amount and also depends on the ammonia content in the gas, and the ammonia content in the gas is greatly influenced by the previous process and the raw material components, so even though the gas treatment amount in the same scale is different, the crystallization time of a crystallization chamber at the lower part of a saturator is insufficient.
Too short a crystallization time may result in crystals of small ammonium sulfate particles not having sufficient time to grow to the desired size, thereby degrading product quality. The degree of crystallization in the mother liquor is generally expressed in terms of the crystal ratio, i.e., the volume of crystals contained in the mother liquor as a percentage of the total volume of the mother liquor and crystals.
The crystal ratio is properly controlled, and when the crystal ratio is too high, the reaction volume of ammonia and sulfuric acid is relatively reduced, the absorption of ammonia is not facilitated, the stirring resistance of mother liquor is increased, the stirring of the mother liquor is poor, and equipment blockage is caused. Generally, when the crystal ratio reaches 30%, the material is extracted, and when the crystal ratio is reduced to 10%, the material is stopped. When the ammonia content in the coal gas is increased sharply due to the problems of the prior production or raw materials, under the same crystallization time, when the size of the crystallized particles is smaller, the crystal ratio of the mother solution is very high, so that the material is forced to be extracted for drying, and the product quality is reduced. The reason for the drastic change of the ammonia content in the gas may be temporary or permanent.
Temporary ammonia content fluctuations are unpredictable at the beginning of the design for a newly built ammonium sulfate unit, and if this is done so, blindly upscaling the plant would result in unnecessary capital and energy waste. For the old ammonium sulfate unit, the permanent ammonium sulfate treatment capacity is larger than the design treatment capacity of equipment due to the process adjustment or raw material change after the ammonium sulfate unit is put into operation, but the traditional treatment method only can stop production and change a saturator, and the transformation cost and difficulty are high.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of prior art, the utility model provides an external crystallization auxiliary device of ammonium sulfate sends into external crystallizer with the unable timely surplus ammonium sulfate crystal of handling of saturator ammonium sulfate crystallizer, for the crystal continues to grow and provides the space, prolongs crystallization time, guarantees product quality when increasing crystallization process volume.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an external ammonium sulfate crystallization auxiliary device comprises an external crystallization tank (1), an external crystallization tank circulating pump (2), an external crystallization tank liquid level meter (3), an adjusting valve (4) and a flowmeter (5); an ammonium sulfate slurry pipeline at the outlet of the ammonium sulfate crystallization tank (6) of the saturator is provided with a first branch pipeline which is connected with the inlet of the external crystallization tank (1), and the regulating valve (4) and the flowmeter (5) are arranged on the first branch pipeline; an ammonium sulfate mother liquor pipeline at the inlet of the ammonium sulfate crystallization tank (6) of the saturator is provided with a second branch pipeline connected with the inlet of the external crystallization tank (1); the external crystallization tank liquid level meter (3) is arranged on the external crystallization tank (1); an inlet of the external crystallization tank circulating pump (2) is connected with the first pipeline through a pipeline, and an outlet of the external crystallization tank circulating pump (2) is connected with the external crystallization tank (1) through a pipeline.
Further, the external crystallization tank (1) and the saturator ammonium sulfate crystallization tank (6) are connected in parallel through a pipeline.
Further, the external crystallization tank (1) and the saturator ammonium sulfate crystallization tank (6) are connected in series through a pipeline.
Furthermore, the upper part and the lower part of the external crystallization tank (1) are connected with an external crystallization tank circulating pump (2) through pipelines.
Further, the regulating valve (4) is interlocked with a flow meter (5), the flow meter (5) regulates and controls the regulating valve (4), and the full flow groove liquid level meter (7) interlocks and controls the regulating valve (4).
Compared with the prior art, the beneficial effects of the utility model are that:
1. the method has the advantages that the method does not influence the original process, is started only when the ammonium sulfate crystallization tank of the original saturator cannot meet the treatment requirement, is in a standby state at the rest time, saves energy, and increases the running stability and the operation flexibility of the device.
2. The capacity expansion transformation of the ammonium sulfate crystallization tank of the saturator without stopping production can be realized, the original ammonium sulfate crystallization tank of the saturator does not need to be transformed, the transformation time is short, the additional equipment investment is low, and the method is easy to realize.
3. Can realize the series or parallel operation with the ammonium sulfate crystallization tank of the original saturator, and is flexible and variable.
4. The matched external crystallization tank circulating pump can realize circulating disturbance on the mother liquor in the crystallization tank when the materials are not lifted, promote crystallization and prevent equipment from being blocked.
5. According to the liquid level condition, the crystallization pump is switched to pump materials and feed positions, and the operation is stable.
6. The regulating valve and the flowmeter are arranged, and the feeding flow can be controlled according to the production condition.
7. The regulating valve and the full-flow liquid level meter are interlocked and cut off, and the safety and stability of production are ensured.
8. The occupied area of the equipment is small, the number of external crystallization tanks can be continuously increased according to production requirements, and the equipment is flexible and variable.
Drawings
Fig. 1 is a schematic structure and a schematic process diagram of the present invention.
In the figure: 1-external crystallization tank 2-external crystallization tank circulating pump 3-external crystallization tank liquid level meter 4-regulating valve 5-flowmeter 6-saturator ammonium sulfate crystallization tank 7-full flow tank liquid level meter 8-crystallization pump 9-saturator
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
[ examples ] A
As shown in figure 1, the external ammonium sulfate crystallization auxiliary device comprises an external crystallization tank (1), an external crystallization tank circulating pump (2), an external crystallization tank liquid level meter (3), an adjusting valve (4) and a flowmeter (5). The ammonium sulfate slurry pipeline at the outlet of the ammonium sulfate crystallization tank (6) of the saturator is provided with a first branch pipeline connected with the inlet of the external crystallization tank (1), and the regulating valve (4) and the flowmeter (5) are arranged on the first branch pipeline. An ammonium sulfate mother liquor pipeline at the inlet of the ammonium sulfate crystallization tank (6) of the saturator is provided with a second branch pipeline connected with the inlet of the external crystallization tank (1). The external crystallization tank liquid level meter (3) is arranged on the external crystallization tank (1). An inlet of the external crystallization tank circulating pump (2) is connected with the first pipeline through a pipeline, and an outlet of the external crystallization tank circulating pump (2) is connected with the external crystallization tank (1) through a pipeline.
Further, the external crystallization tank (1) is connected with the ammonium sulfate crystallization tank (6) of the saturator in parallel through a pipeline. The volume of ammonium sulfate crystallization equipment is increased, so that the ammonium sulfate crystallization time can be flexibly adjusted according to the actual production condition.
Further, the external crystallization tank (1) and the saturator ammonium sulfate crystallization tank (6) are connected in series through a pipeline. Multistage crystallization of the particles can be achieved.
Furthermore, the upper part and the lower part of the external crystallization tank (1) are connected with an external crystallization tank circulating pump (2) through pipelines. And (3) adjusting the feeding mode of the external circulating pump (2) according to the liquid level condition shown by the external crystallization tank liquid level meter (3), and selecting to feed from the upper part or the lower part.
Furthermore, the regulating valve (4) is interlocked with the flowmeter (5), the flowmeter (5) regulates and controls the regulating valve (4), and the full flow groove liquid level meter (7) interlocks and controls the regulating valve (4). The flowmeter (5) interlockingly adjusts the flow of the material entering the external crystallization tank (1) through the adjusting valve (4) according to the actual production condition; the full-flow groove liquid level meter (7) adjusts and controls the regulating valve (4) to prevent the full-flow groove from being incapable of meeting the water seal requirement, and the automatic and stable operation of the system can be realized.
The process and the working process of the utility model are as follows:
when the crystal ratio of the saturator (9) is too high and the crystal particles are less than the material lifting requirement, the crystallization pump starts to supply materials to the external crystallization tank (1), and the external crystallization tank circulating pump (2) does not work; when the crystallization pump stops feeding to the external crystallization tank (1), the external crystallization tank circulating pump (2) starts working at the moment, mother liquor is circularly stirred, crystallization is promoted, and the problem of difficult material lifting caused by excessive accumulation of crystals is prevented.
Meanwhile, when the external crystallization tank liquid level meter (3) displays that the liquid level is higher than the pumping outlet of the external crystallization circulating pump (2) and higher than a set alarm value, the external crystallization circulating pump (2) pumps materials (c) from the upper part of the external crystallization tank (1), and supplies materials (d) from the bottom of the external crystallization tank (1) to effectively circulate and stir the inside of the external crystallization tank (1) so as to prevent bottom stacking.
When the liquid level meter (3) of the external crystallization tank displays that the liquid level is lower than a set value, the material (a) is pumped from the bottom of the external crystallization tank (1) and the material (b) is fed from the top of the external crystallization tank (1). Through external crystallization circulating pump (2) working line of liquid level switching, both can realize effectively stirring to the crystallization, can guarantee again that the system is stable, prevent that the crystallization tank liquid level from crossing when low can't taking out the material.
When the material needs to be extracted from the external crystallization tank (1), an inlet valve from the saturator to the crystallization pump (8) is closed, an inlet valve from the external crystallization tank (1) to the crystallization pump (8) is opened, and the mother liquor is sent to the original crystallization tank through the crystallization pump.
The ammonium sulfate crystallization tank (6) of the saturator and the external crystallization tank (1) can realize series or parallel operation. When the parallel operation is carried out, the full-flow mother liquor of the two crystallization tanks returns to the saturator together; when the serial operation is carried out, the full-flow mother liquor of the ammonium sulfate crystallization tank (6) of the saturator enters the external crystallization tank (1) and then flows back to the saturator (9) fully, so that the crystallization time is prolonged.
The utility model discloses be equipped with governing valve (4), flowmeter (5), can be simultaneously to saturator ammonium sulfate crystallizer (6) and external crystallizer (1) feed to according to production actual conditions artificial settlement and control proportion relation. The regulating valve (4) is controlled in an interlocking way through the full launder liquid level meter (7), and the regulating valve (4) is cut off when the liquid level of the full launder is lower than a set value, so that the water sealing requirement of the full launder is ensured, and the system is ensured to automatically, safely and stably run.
The ammonia content in the coal gas is greatly influenced by the prior process and the raw material components, and when the ammonium sulfate crystallization yield exceeds the designed processing capacity of equipment, the ammonium sulfate crystallization time is shortened, so that ammonium sulfate crystallization particles are too small, and the product quality is reduced. The utility model discloses an external crystallization auxiliary device of ammonium sulfate sends into external crystallizer with the unable timely surplus ammonium sulfate crystal of handling of former device, for the crystal continues to grow and provides the space, prolongs the crystallization time, increases crystallization treatment capacity, guarantees product quality. For a new device, the utility model can be used as an auxiliary device for increasing the operation flexibility; for the existing device, the transformation without stopping production can be realized. The utility model has the advantages of simple, perfect and reasonable process, easy operation, low cost, less investment, energy saving and the like.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (5)
1. An external ammonium sulfate crystallization auxiliary device is characterized by comprising an external crystallization tank (1), an external crystallization tank circulating pump (2), an external crystallization tank liquid level meter (3), an adjusting valve (4) and a flowmeter (5); an ammonium sulfate slurry pipeline at the outlet of the ammonium sulfate crystallization tank (6) of the saturator is provided with a first branch pipeline which is connected with the inlet of the external crystallization tank (1), and the regulating valve (4) and the flowmeter (5) are arranged on the first branch pipeline; an ammonium sulfate mother liquor pipeline at the inlet of the ammonium sulfate crystallization tank (6) of the saturator is provided with a second branch pipeline connected with the inlet of the external crystallization tank (1); the external crystallization tank liquid level meter (3) is arranged on the external crystallization tank (1); an inlet of the external crystallization tank circulating pump (2) is connected with the first pipeline through a pipeline, and an outlet of the external crystallization tank circulating pump (2) is connected with the external crystallization tank (1) through a pipeline.
2. The external ammonium sulfate crystallization auxiliary device as claimed in claim 1, wherein the external crystallization tank (1) is connected with the saturator ammonium sulfate crystallization tank (6) in parallel through a pipeline.
3. The external ammonium sulfate crystallization auxiliary device as claimed in claim 1, wherein the external crystallization tank (1) is connected with the saturator ammonium sulfate crystallization tank (6) in series through a pipeline.
4. The external ammonium sulfate crystallization auxiliary device as claimed in claim 1, wherein the upper part and the lower part of the external crystallization tank (1) are connected with an external crystallization tank circulating pump (2) through pipelines.
5. The external ammonium sulfate crystallization auxiliary device as claimed in claim 1, characterized in that the regulating valve (4) is interlocked with a flow meter (5), the flow meter (5) regulates and controls the regulating valve (4), and the overflow tank level gauge (7) interlocks and controls the regulating valve (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222775278.9U CN218653061U (en) | 2022-10-21 | 2022-10-21 | External crystallization auxiliary device of ammonium sulfate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222775278.9U CN218653061U (en) | 2022-10-21 | 2022-10-21 | External crystallization auxiliary device of ammonium sulfate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218653061U true CN218653061U (en) | 2023-03-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222775278.9U Active CN218653061U (en) | 2022-10-21 | 2022-10-21 | External crystallization auxiliary device of ammonium sulfate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218653061U (en) |
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2022
- 2022-10-21 CN CN202222775278.9U patent/CN218653061U/en active Active
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