Device for removing acid tar residues in ammonium sulfate mother liquor

Abstract

The utility model relates to the technical field of coked ammonium sulfate production, in particular to a device for removing acid tar residues in ammonium sulfate mother liquor. The problems that in existing coked ammonium sulfate production, the acid tar residue cleaning operation intensity is large, and the environment is poor are solved. The device comprises a saturator mother liquor overflow pipe, a swirler and a waterwheel type scraper arc screen, a bottom outlet of the saturator mother liquor overflow pipe is connected with a swirler, the bottom outlet of the saturator mother liquor overflow pipe is connected with a middle inlet of the swirler, a bottom outlet of the swirler is provided with a flow regulating valve, and the flow regulating valve is connected with a liquid seal pipe; the top of the liquid seal pipe is communicated into the open full chute through a bent pipe, mother liquor containing acid tar residues overflows from the top of the cyclone and is fed into the waterwheel box body, and the acid tar residues are separated from the mother liquor after passing through the waterwheel type scraper arc sieve. The device can intercept and remove most of acid tar residues in the ammonium sulfate mother liquor, so that the labor intensity of manually fishing out the acid tar residues is reduced, and the operation risk is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coking ammonium sulfate production, and particularly relates to a device for removing acid tar residue impurities in ammonium sulfate mother liquor. Background Art

[0002] The coke oven gas entering the ammonium sulfate saturator still carries a small amount of misty tar. In the saturator, the sprayed ammonium sulfate mother liquor acts on the tar mist in the gas to generate acid tar residue impurities, which then overflow with the mother liquor and finally float and accumulate on the liquid surface of the full-flow tank. If the acid tar residue impurities are not removed in time, they will surely block the overflow outlet of the full-flow tank, and ultimately cause the liquid level of the full-flow tank to rise and the mother liquor to overflow outside the full-flow tank. At present, most enterprises arrange employees to manually remove the acid tar residue impurities with a dipper. This operation has a large labor intensity, a poor working environment, and is difficult to control safety risks. Content of the Utility Model

[0003] In order to solve the problem that in the current coking ammonium sulfate production, there is a lack of corresponding automatic cleaning tools for the generated acid tar residue impurities, resulting in a large labor intensity and a poor working environment for the cleaning operation, the utility model provides a device for removing acid tar residue impurities in ammonium sulfate mother liquor.

[0004] The utility model is realized by adopting the following technical scheme: A device for removing acid tar residue impurities in ammonium sulfate mother liquor includes a saturator mother liquor overflow pipe connected to the saturator for guiding the mother liquor of the saturator and a full-flow tank with an open top for circulating the mother liquor; the bottom outlet of the vertically arranged saturator mother liquor overflow pipe is connected with a cyclone, the bottom outlet of the saturator mother liquor overflow pipe is connected to the middle inlet of the cyclone, a flow regulating valve is installed at the bottom outlet of the cyclone, and the bottom of the flow regulating valve is connected with a vertically arranged liquid seal pipe through a transverse pipeline; the bottom of the liquid seal pipe is communicated with the transverse pipeline, and the top of the liquid seal pipe is communicated to the open top of the full-flow tank through a bent pipeline;

[0005] It also includes a waterwheel located above the open top of the full-flow tank; the waterwheel includes a plurality of waterwheel boxes supported by spokes and capable of rotating along with the central axis and scrapers arranged along the outer circumference, i.e., the outer edge of the waterwheel box; the top outlet of the cyclone is connected with a mother liquor pipe, and the mother liquor pipe drains the mother liquor containing residue impurities into the waterwheel box to drive the waterwheel to rotate;

[0006] Below the waterwheel, an arc sieve concentric with the waterwheel is also installed through a bracket. The arc sieve matches the width of the waterwheel box and the scraper is close to the surface of the arc sieve; one end of the arc sieve is located below the outlet of the mother liquor pipe and this end is the high position, and the other end of the arc sieve is the low position; a collection bucket is arranged below the low position of the arc sieve; the heights of the tops of the liquid seal pipe and the mother liquor pipe match the gas pressure in the saturator, that is, there should be enough water seal water column height to prevent gas from overflowing.

[0007] Further, a manual wheel is installed on one side of the waterwheel.

[0008] Further, the radian value of the sieve surface of the circular arc sieve is 150 ± 10°; taking the waterwheel as the dial, the high position where the circular arc sieve is installed is at the 2 o'clock position of the dial, and the low position is at the 7 o'clock position.

[0009] Further, the other end of the circular arc sieve is connected with a downward-bent drainage section.

[0010] Further, the bottom of the collection bucket is provided with moving wheels and the collection bucket is arranged closely against the full flow chute.

[0011] Further, the collection bucket is located below the drainage section.

[0012] Further, a plurality of scraping plates are evenly arranged on the outer circumference, i.e., the outer edge of the waterwheel box body and form a scraping plate group.

[0013] Advantages of the present utility model: By removing the liquid seal groove originally arranged in the full flow chute, the overflow pipe of the saturator mother liquor, the cyclone and the liquid seal pipe are all changed to be externally arranged, the maintenance is simple, and the hidden danger investigation is visually visible.

[0014] The present utility model utilizes the set of devices of 'waterwheel - scraping plate - circular arc sieve' to intercept and remove most of the acid tar slag impurities in the ammonium sulfate mother liquor, reduces the labor intensity of manually fishing out the acid tar slag impurities, and reduces the operation risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 One of the structural schematic diagrams of the present utility model (the mother liquor is initially separated by the cyclone).

[0016] Figure 2 Two of the structural schematic diagrams of the present utility model (schematic of waterwheel - scraping plate - circular arc sieve).

[0017] 1 - overflow pipe of saturator mother liquor, 2 - cyclone, 3 - flow regulating valve, 4 - liquid seal pipe, 5 - mother liquor pipe, 6 - waterwheel, 61 - waterwheel box body, 62 - scraping plate, 63 - manual wheel, 7 - circular arc sieve, 8 - collection bucket, 9 - full flow chute. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] During the ammonium sulfate production process, acid tar slag impurities will float and accumulate in the ammonium sulfate mother liquor. At present, it is necessary to observe regularly manually and fish out in time. The present utility model improves the process and equipment, initially separates the ammonium sulfate mother liquor containing acid tar slag impurities by using a cyclone, and then utilizes the set of devices of 'waterwheel - scraping plate - circular arc sieve' to intercept and remove most of the acid tar slag impurities in the ammonium sulfate mother liquor, reduces the labor intensity of manually fishing out the acid tar slag impurities, reduces the operation risk, and solves the problem that the acid tar slag impurities block the overflow outlet of the full flow chute and cause the mother liquor in the full flow chute to overflow.

[0019] The following are some embodiments of the present utility model in the specific implementation process, but the present utility model is not limited to the following embodiments.

[0020] Embodiment 1. A device for removing acid tar residue impurities in ammonium sulfate mother liquor, comprising a saturator mother liquor overflow pipe 1 connected to a saturator for guiding the mother liquor of the saturator and an open-top full-flow tank 9 for the turnover of the overflowing mother liquor; the top inlet of the vertically arranged saturator mother liquor overflow pipe 1 is connected to the saturator, and the bottom outlet of the saturator mother liquor overflow pipe 1 is connected to a cyclone 2. The bottom outlet of the saturator mother liquor overflow pipe 1 is connected to the middle inlet of the cyclone 2. A flow regulating valve 3 is installed at the bottom outlet of the cyclone 2, and the bottom of the flow regulating valve 3 is connected to a vertically arranged liquid seal pipe 4 through a horizontal pipeline; the bottom of the liquid seal pipe 4 is communicated with the horizontal pipeline, and the top of the liquid seal pipe 4 is communicated to the top of the open-top full-flow tank 9 through an inverted U-shaped bent pipeline;

[0021] It further includes a waterwheel 6 located above the open-top full-flow tank 9; the waterwheel 6 includes a plurality of waterwheel boxes 61 supported by spokes and capable of rotating with the central axis (the central axis is rotatably supported on a bearing seat and bearings, the spokes are connected to the central axis, and the bearing seat is supported by a corresponding bracket) and scraping plates 62 uniformly arranged along the outer circumference of the waterwheel box 61; the top outlet of the cyclone 2 is connected to a mother liquor pipe 5, and the mother liquor pipe 5 leads the mother liquor containing slag impurities to the waterwheel box 61 to drive the waterwheel 6 to rotate;

[0022] Below the waterwheel 6, an arc screen 7 concentric with the waterwheel 6 is also installed through a bracket. The arc screen 7 matches the width of the waterwheel box 61 and the scraping plate 62 is close to the surface of the arc screen 7; one end of the arc screen 7 is located below the outlet of the mother liquor pipe 5 and this end is the high position, and the other end of the arc screen 7 is the low position; a collection bucket 8 is arranged below the other end of the arc screen 7; the top of the saturator mother liquor overflow pipe 1 is higher than the tops of the liquid seal pipe 4 and the mother liquor pipe 5, which can ensure that there is enough water seal water column height to prevent the gas from overflowing. A manual wheel 63 is installed on one side of the waterwheel 6. The manual wheel 63 can be installed on the rotating shaft of the waterwheel or directly on the spoke of the waterwheel 6 to facilitate manually rotating the waterwheel 6.

[0023] The waterwheel 6 adopts a general waterwheel structure, and the material used is required to have acid-proof performance. The waterwheel boxes 61 (also called water buckets) are uniformly arranged around it. The mother liquor flows into the waterwheel boxes to drive the waterwheel boxes 61 to rotate; the scraping plate 62 is arranged on the outer edge of the outer circumference of the waterwheel box, parallel to the axis of the waterwheel, and the same width as the waterwheel box, and is used to scrape the slag impurities on the screen surface of the arc screen 7. The scraping plate 62 is as close as possible to the arc screen 7, but does not affect the normal rotation of the waterwheel box 61.

[0024] Example 2 The curvature of the screen surface of the arc screen 7 is 150±10°; the high position of the arc screen 7 is installed at the 2 o'clock position of the dial. This arrangement can maximize the utilization rate of the arc screen surface. After the waterwheel rotates, the mother liquor will flow back from the waterwheel box 61 to the arc screen surface from the 2 o'clock position, while the screening point of the ordinary arc screen is low and the fluid is uncontrolled. In addition, during the rotation of the waterwheel, the waterwheel box 61 can maintain the vertical impact force of the fluid on the screen surface, which can further improve the screening efficiency.

[0025] Example 3 The lower end of the arc screen 7 is connected with a downwardly bent drainage section to facilitate the flow of slag and debris into the collecting bucket 8; the collecting bucket 8 is provided with moving wheels at the bottom and the collecting bucket 8 is arranged close to the full chute 9 for easy movement and to avoid slag and debris or mother liquor from flowing out of the full chute or the collecting bucket as much as possible.

[0026] The following is combined with Figure 1-2 The utility model is further described. The utility model is a device for removing acid tar slag impurities from ammonium sulfate mother liquor, specifically: optimizing the existing process and equipment, changing the overflow pipe 1 of the saturator mother liquor from directly entering the liquid seal tank in the full chute 9 to entering the newly installed cyclone 2 (the cyclone commonly used in this field can achieve the following functions), the mother liquor containing acid tar impurities from the saturator enters the cyclone 2 and is initially separated, and the pure mother liquor with a larger specific gravity is discharged from the lower part of the cyclone 2, and a flow regulating valve 3 is arranged at the lower part. The pure mother liquor with a larger specific gravity is sent horizontally to the vertical liquid seal pipe 4 after passing through the flow regulating valve 3, and finally sent to the full chute 9; the mixed suspended mother liquor containing acid tar slag impurities has a relatively light specific gravity, and after separation in the cyclone 2, it surges upward through the mother liquor pipe 5 containing slag impurities and is sent to the set of "waterwheel-scraper-arc screen" devices, so that most of the acid tar slag impurities in the mixed suspended mother liquor containing acid tar foam slag impurities are intercepted and removed. Specifically: the waterwheel-scraper-arc screen device is arranged on the top of the full chute 9, and the mixed mother liquor containing acid tar slag and impurities overflows from the cyclone 2 into the waterwheel box 61 on one side of the waterwheel 6. The width of the waterwheel box 61 matches the flow rate of the mother liquor pipe 5 containing slag and impurities, that is, it should match the production capacity of the ammonium sulfate saturator. The deflection force formed drives the waterwheel to rotate, and the scrapers 62 are evenly arranged along the outer edge of the waterwheel box 61. The arc screen 7 is arranged at the bottom of the waterwheel. The arc screen 7 and the waterwheel should be concentric. The gap between the arc screen surface and the scraper set on the outer edge of the waterwheel box can be adjusted. While ensuring that the waterwheel can rotate smoothly, the scraper should be as close to the arc screen surface as possible to facilitate scraping and cleaning of the slag and impurities. The arc value of the arc screen surface is 150°, and the screen surface width matches the width of the waterwheel box. The high position of the arc screen is the 2 o'clock position on the dial, and the low position is the 7 o'clock position ( Figure 2As shown in the figure, after the mother liquor containing slag and impurities is fed into the waterwheel box, the waterwheel starts to rotate clockwise, and the mixed mother liquor starts to flow back from the waterwheel box to the screen surface from the 3 o'clock position on the dial, and the pure mother liquor is separated through the arc screen surface and merged into the full chute. The remaining slag and impurities slide along the screen surface to the lowest position 6 o'clock with the scraper. After the scraper rotates to the 6 o'clock position, the slag and impurities on the screen surface are scraped upward, and the mother liquor in the slag and impurities can be further leached while ascending. After reaching the end of the arc screen surface at the 7 o'clock position, the slag and impurities are scraped off the arc screen surface and fall into the collection bucket 8 set close to the outer wall of the full chute. A manual wheel 63 is set on the side of the waterwheel close to the platform. When there are more acid tar slag and impurities and the resistance of the waterwheel scraper is larger, or when the production device is ready to stop, the waterwheel can be manually assisted to rotate to scrape off the acid tar slag and impurities on the arc screen surface.

[0027] The height of the liquid seal pipe 4 and the height of the slag-containing mother liquor pipe 5 that is discharged upward from the cyclone to the waterwheel are determined according to the saturator gas pressure. The saturator mother liquor overflow pipe, the cyclone and the liquid seal pipe are equivalent to forming a group of communicating vessel-type water seals, which can ensure that the gas in the saturator will not leak. The potential energy of the slag-containing ammonium sulfate mother liquor continuously fed into the waterwheel housing 61 is used to drive the waterwheel to rotate, thereby overcoming the resistance generated when the scraper 62 scrapes off the acid tar slag on the surface of the arc screen 7. Therefore, the flow rate of the mother liquor fed into the waterwheel housing should be as large as possible, but the waterwheel housing 61 has a certain limit. If the flow rate is too large, it will overflow everywhere. At this time, the flow rate regulating valve 3 at the bottom of the cyclone can be relied on to control the flow rate of the ammonium sulfate mother liquor fed into the waterwheel to ensure a relative balance. When the water wheel fails, the flow regulating valve 3 is fully opened, and the mother liquid will be completely discharged from the lower part of the cyclone, flowing through the liquid seal pipe to the full chute 9. In this case, the liquid level at the top of the cyclone is flush with the liquid seal pipe, which can still ensure that the saturator gas will not leak.

[0028] The technical features of the utility model are as follows: the saturator mother liquid overflow pipe and liquid seal pipe are changed to external devices;

[0029] A new set of cyclones is added to the process to carry out preliminary separation of the ammonium sulfate saturator mother liquor containing acid tar residue.

[0030] The addition of a set of 'waterwheel-scraper-arc screen' equipment can intercept and remove most of the acid tar residue in the ammonium sulfate mother liquor.

[0031] The mother liquor in the waterwheel box flows back to the screen surface, which improves the screening efficiency of the arc screen. The mixed mother liquor starts to flow back to the arc screen surface from the 2 o'clock position, and the screen surface utilization rate is high.

[0032] The water truck is equipped with a scraper, which can scrape away debris and clean the screen surface without power, ensuring that pure mother liquor can pass through the screen smoothly.

[0033] The flow regulating valve at the bottom of the cyclone can control the flow of mother liquid entering the water wheel box to ensure smooth and stable production.

Claims

1. A device for removing acid tar residue impurities from ammonium sulfate mother liquor, comprising a saturator mother liquor overflow pipe (1) connected to a saturator for diverting the saturator mother liquor and a top-open full chute (9) for circulating the mother liquor; characterized in that: The bottom outlet of a vertically arranged saturator mother liquor overflow pipe (1) is connected to a cyclone (2), the bottom outlet of the saturator mother liquor overflow pipe (1) is connected to a middle inlet of the cyclone (2), a flow regulating valve (3) is installed at the bottom outlet of the cyclone (2), and the bottom of the flow regulating valve (3) is connected to a vertically arranged liquid sealing pipe (4) through a transverse pipeline; the bottom of the liquid sealing pipe (4) is connected to the transverse pipeline, and the top of the liquid sealing pipe (4) is connected to the top opening of the full chute (9) through a bent pipeline; It also includes a waterwheel (6) located above the top opening of the full chute (9); the waterwheel (6) includes a plurality of waterwheel boxes (61) supported by spokes and capable of rotating with a central axis, and a scraper (62) arranged along the outer circumference, i.e., the outer edge, of the waterwheel boxes (61); the top outlet of the cyclone (2) is connected to a mother liquor pipe (5), and the mother liquor pipe (5) drains the mother liquor containing slag and impurities into the waterwheel boxes (61) to drive the waterwheel (6) to rotate; A circular arc screen (7) concentric with the water wheel (6) is also installed below the water wheel (6) through a bracket. The circular arc screen (7) matches the width of the water wheel housing (61) and the scraper (62) is close to the surface of the circular arc screen (7). One end of the circular arc screen (7) is located below the outlet of the mother liquid pipe (5) and this end is used as the high position, and the other end of the circular arc screen (7) is the low position. A collecting bucket (8) is provided below the low position of the circular arc screen (7). The heights of the top of the liquid seal pipe (4) and the mother liquid pipe (5) match the gas pressure in the saturator.

2. A device for removing acid tar residue from ammonium sulfate mother liquor as claimed in claim 1, characterized in that: A manual wheel disc (63) is installed on one side of the waterwheel (6).

3. A device for removing acid tar residue from ammonium sulfate mother liquor as claimed in claim 1 or 2, characterized in that: The arc value of the screen surface of the arc screen (7) is 150±10°; with the side of the waterwheel (6) as the dial, the high position of the arc screen (7) is the 2 o'clock position of the dial, and the low position is the 7 o'clock position.

4. A device for removing acid tar residue from ammonium sulfate mother liquor as claimed in claim 3, characterized in that: The other end of the circular arc screen (7) is connected to a downwardly bent drainage section.

5. A device for removing acid tar residue from ammonium sulfate mother liquor as claimed in claim 4, characterized in that: The bottom of the collecting bucket (8) is provided with moving wheels and the collecting bucket (8) is arranged closely to the full chute (9); the collecting bucket (8) is located below the drainage section.

6. A device for removing acid tar residue from ammonium sulfate mother liquor as claimed in claim 1 or 2, characterized in that: A plurality of scrapers (62) are evenly arranged on the outer circumference, i.e., the outer edge, of the waterwheel housing (61) to form a scraper group.

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