CN204933135U - A kind of ammonium sulfate tail gas purifier - Google Patents

Abstract

The utility model relates to an ammonium sulfate tail gas purifier, which comprises a purifier, wherein the purifier consists of an upper cylindrical section and a lower conical section to form a closed cylinder, the top of the purifier is provided with a flared tube which extends inwards and is enlarged, and the small-mouth end of the flared tube is connected with a cyclone dust collector through a tail gas inlet tube; an annular spraying pipe and an annular baffle are arranged between the horn pipe and the wall of the purifier barrel, the annular baffle is positioned below the annular spraying pipe, and the annular spraying pipe is connected with an outlet of a mother liquor circulating pump in an ammonium sulfate production working section through a mother liquor inlet pipe; the top of the purifier is provided with a discharge pipe, the bottom of the purifier is provided with an emptying pipe, the middle barrel is provided with an overflow pipe, the emptying pipe and the overflow pipe are respectively connected with a reflux tank, and the cone section barrel is provided with a cleaning water pipe. The utility model can remove the ammonium sulfate dust contained in the tail gas after the cyclone dust collector in the ammonium sulfate production section, purify the tail gas and protect the environment; the cost of equipment and pipeline modification is reduced, the investment is low, the effect is fast, and the energy consumption is low; and simple structure, reasonable design and convenient operation.

Description

A kind of ammonium sulfate tail gas purifier

technical field

The utility model relates to the tail gas purification treatment technology of the ammonium sulfate workshop section in coking production, in particular to an ammonium sulfate tail gas purifier.

Background technique

Most of the coking production in our country adopts the saturator method to produce ammonium sulfate to recover the ammonia in the gas. In this section, the tail gas produced after ammonium sulfate is dried is discharged to the atmosphere by the exhaust fan after the ammonium sulfate dust is removed by the cyclone dust collector. With the intensification of production and the lack of capacity of the cyclone dust collector, the separation effect of the cyclone dust collector is getting worse and worse. The tail gas entrains a large amount of ammonium sulfate dust into the atmosphere and pollutes the environment, and the cost of equipment and pipeline transformation is too high. Ammonium tail gas dust pollution has become one of the problems to be solved urgently in coking production.

Utility model content

The utility model provides an ammonium sulfate tail gas purifier, which is used to remove the ammonium sulfate dust contained in the tail gas after the cyclone dust collector in the ammonium sulfate production section, purify the tail gas, and protect the environment; and reduce the transformation cost of equipment and pipelines, with less investment and Quick effect, low energy consumption; simple structure, reasonable design, convenient operation.

In order to achieve the above object, the utility model adopts the following technical solutions to realize:

An ammonium sulfate tail gas purifier, including a purifier, the purifier is composed of an upper cylinder section and a lower cone section to form a closed cylinder body, the top of which is provided with an inwardly extending and enlarged horn tube, and the small mouth end of the horn tube passes through the tail gas inlet The pipe is connected to the cyclone dust collector; an annular spray pipe and an annular baffle are arranged between the trumpet pipe and the wall of the purifier, the annular baffle is located under the annular spray pipe, and the annular spray pipe is connected to the mother liquor in the ammonium sulfate production section through the mother liquor inlet pipe The outlet of the circulating pump; the top of the purifier is equipped with a discharge pipe, the bottom is equipped with an empty pipe, and the middle cylinder is equipped with an overflow pipe.

The annular baffle is arranged obliquely to the bottom of the purifier, and the included angle with the horizontal line is 5-15°, and the bottom end of the annular baffle is 100-200 mm higher than the bottom surface of the trumpet tube.

There are at least two annular spray pipes, and two rows of spray holes are evenly arranged at the bottom of each annular spray pipe along the circumferential direction, and the two rows of spray holes are arranged in a staggered manner.

Compared with the prior art, the beneficial effects of the utility model are:

1) Further purification of the tail gas after the cyclone dust collector can effectively remove the ammonium sulfate and dust contained in the tail gas of ammonium sulfate, purify the tail gas and protect the environment;

2) Reduce the cost of equipment and pipeline transformation, less investment, quick results, and low energy consumption;

3) Ammonium sulfate tail gas purifier has simple structure, reasonable design and convenient operation

4) The annular baffle in the purifier is arranged obliquely to increase the gas flow resistance, which not only prolongs the contact time between the tail gas and the bottom solution, but also ensures that the mother liquor sprayed by the annular spray pipe can fully absorb the remaining ammonium sulfate and dust;

5) The bottom of the purifier is equipped with a cone section, and an emptying pipe and a cleaning water pipe are installed to ensure the smooth discharge of blockages.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a bottom view of the annular spray pipe of the present invention.

Fig. 3 is a cross-sectional view of A-A in Fig. 2 .

Fig. 4 is the layout diagram of the utility model in the process of producing ammonium sulfate by the saturator method.

In the figure: 1. Cylinder section 2. Cone section 3. Trumpet pipe 4. Exhaust gas inlet pipe 5/6. Ring spray pipe 7. Ring baffle 8. Rib plate 9. Discharge pipe 10. Mother liquor inlet pipe 11. Valve 1 12. Vent pipe 13. Valve two 14. Overflow pipe 15. Valve three 16. Valve four 17. Return tank 18. Cleaning water pipe 19. Valve five 20. Blower 21. Hot air blower 22. Boiling dryer 23. Cyclone dust removal 24. Ammonium sulfate tail gas purifier 25. Exhaust fan 26. Screw conveyor

detailed description

The specific embodiment of the utility model will be further described below in conjunction with accompanying drawing:

See Fig. 1, is the structural representation of the utility model. The utility model is an ammonium sulfate tail gas purifier 24, comprising a purifier, the purifier is composed of an upper cylinder section 1 and a lower cone section 2 to form a closed cylinder body, the top is provided with an inwardly extending and enlarged horn tube 3, the horn The small mouth end of the pipe 3 is connected to the cyclone dust collector 23 through the tail gas inlet pipe 4; the annular spray pipes 5, 6 and the annular baffle 7 are arranged between the trumpet pipe 3 and the wall of the purifier, and the annular baffle 7 is located at the annular spray pipe 5, Below 6, the annular spray pipes 5 and 6 are connected to the outlet of the mother liquor circulating pump in the ammonium sulfate production section through the mother liquor inlet pipe 10; the top of the purifier is provided with a discharge pipe 9, the bottom is provided with a vent pipe 12, and the middle cylinder is provided with an overflow pipe 14. The emptying pipe 12 and the overflow pipe 14 are respectively connected to the backflow tank 17, and the cleaning water pipe 18 is arranged on the cylinder body of the cone section 2.

The annular baffle 7 is arranged inclined to the bottom of the purifier, and the angle with the horizontal line is 5-15°, and the bottom end of the annular baffle 7 is 100-200 mm higher than the bottom surface of the trumpet tube 3 .

There are at least two annular spray pipes 5 and 6, and two rows of spray holes are evenly arranged at the bottom of each annular spray pipe 5/6 along the circumferential direction, and the two rows of spray holes are arranged in a staggered manner. (As shown in Figure 2-Figure 3)

An ammonium sulfate tail gas device of the utility model is used to purify the ammonium sulfate tail gas produced by the process of producing ammonium sulfate using a saturator method; its working principle is as follows:

The tail gas discharged from the cyclone dust collector 23 with a large amount of ammonium sulfate dust is transported to the top of the purifier through the tail gas inlet pipe 4, and enters the inner cavity of the purifier through the horn tube 3. Suspended solids such as ammonium sulfate particles and dust are mostly washed into the ammonium sulfate mother liquor at the bottom of the purifier and dissolved under the action of inertia;

The upper part of the purifier is equipped with annular spray pipes 5 and 6, and the spray mother liquor drawn from the outlet of the circulation pump in the ammonium sulfate production section enters the annular spray pipes 5 and 6 through the mother liquor inlet pipe 10 and sprays downward; the bottom of the annular spray pipes 5 and 6 An annular baffle 7 is provided, and the exhaust gas flows upward through the annular channel formed between the annular baffle 7 and the trumpet tube 3 and contacts with the spray mother liquor countercurrently. The remaining ammonium sulfate dust in the tail gas is absorbed and dissolved by the mother liquor and enters the bottom of the purifier. solution; the tail gas sprayed by the mother liquor is drawn out through the discharge pipe 9 at the top of the purifier and discharged into the atmosphere.

A part of the suction force is provided by adjusting the height of the discharge pipe 9 to compensate for the resistance loss caused by the purifier to the exhaust gas flow.

The gas flow velocity of the exhaust gas passing through the outlet of the horn tube 9 is less than 1.5m/s, and the diameter of the horn tube 9 is determined accordingly.

The ammonium sulfate mother liquor at the bottom of the purifier is regularly emptied and cleaned with clean water.

In the utility model, the start and stop of the spraying of the annular spray pipes 5 and 6 are controlled by the valve one 11, and the spraying mother liquor drawn out will not destroy the water balance in the saturator, so as not to destroy the crystallization of ammonium sulfate and affect the process production; The hole opening at the bottom of the annular spray pipes 5 and 6 can ensure the complete spraying of the mother liquor; the annular baffle 7 can be fixed on the cylinder wall through the rib plate 8 and can be set at an inclination, and the annular baffle 7 can increase the resistance of the gas flow, which not only increases The contact time between the tail gas and the solution in the purifier can make the mother liquor sprayed by the annular spray pipes 5 and 6 fully absorb the remaining ammonium sulfate and dust in the tail gas.

During normal operation, valve three 15 and valve four 16 are opened, and the ammonium sulfate mother liquor at the bottom of the purifier rises to a certain liquid level and then is discharged through the overflow pipe 14 and enters the reflux tank 17; The rise of concentration and the increase of dust, solid particles gradually increase, easily cause pipeline blockage, open valve two 13 at this moment, the ammonium sulfate mother liquor in the purifier is discharged in the reflux tank 17 by vent pipe 12; Then open valve 5.19, clear water enters the interior of the purifier through the cleaning water pipe 18 for cleaning, and the slope of the cone section 2 at the bottom of the purifier can quickly discharge the blockage from the purifier, and discharge it into the return tank 17 through the vent pipe 12.

Fig. 4 is the layout diagram of the utility model in the process of producing ammonium sulfate by the saturator method. The main equipment of adopting the saturator method to produce ammonium sulfate technology comprises blower fan 20, hot air blower 21, boiling drier 22 and cyclone dust collector 23 connected successively, and boiling drier 22 links to each other with screw conveyer 26 in addition; The sulfur described in the utility model The ammonium tail gas purifier 24 is arranged behind the cyclone dust collector 23 , and its discharge pipe 9 is additionally connected to an exhaust fan 25 .

Claims (3)

1. a sulphur ammonium exhaust purifier, it is characterized in that, comprise clarifier, described clarifier bores section forming closed cylindrical shell by top cylinder section and bottom, top is established and is extended internally and the oviduct expanded, and the osculum end of oviduct connects cyclone dust collectors by gas inlet pipe; Establish circular spray tube and ring baffle between oviduct and clarifier barrel, ring baffle is positioned at below circular spray tube, and circular spray tube connects the Recycling Mother Solution pump discharge in sulphur ammonium production workshop section by mother liquor inlet tube; Discharge pipe is established at clarifier top, and blow-down pipe is established in bottom, and middle cylinder establishes overflow pipe, and blow-down pipe is connected backflash respectively with overflow pipe, and cone section cylindrical shell establishes cleaning water pipe.

2. a kind of sulphur ammonium exhaust purifier according to claim 1, is characterized in that, described ring baffle is arranged to inclined downward in clarifier, and be 5 ~ 15 ° with horizontal line angle, ring baffle lowermost end is higher than oviduct bottom surface 100 ~ 200mm.

3. a kind of sulphur ammonium exhaust purifier according to claim 1, it is characterized in that, described annular spray line is at least 2 roads, along the circumferential direction evenly arranges 2 row's spray holes bottom per pass annular spray line, and 2 row's spray holes are staggered.