Sulfur foam filtering device

Abstract

The sulfur foam filtering device comprises a filtering tank, the interior of the filtering tank is hollow to form a filtering cavity, and a liquid distributor, a filtering pipe and a clear liquid main pipe are sequentially arranged in the filtering cavity from top to bottom; a discharge valve is arranged at the bottom of the filtering tank and is connected with a concentration tank; the clear liquid mother pipe is communicated with an air pulse backwashing system, and a liquid outlet valve is arranged at the end part of the clear liquid mother pipe. The filter has the beneficial effects that the 316L metal fiber filter pipe is adopted, so that the filter has a good filtering effect and also has excellent characteristics of acid resistance, alkali resistance and pressure bearing; the device can be repeatedly cleaned and used, consumables are saved, a quick connection structure is adopted, and the maintenance time is shortened; the foam filter is static equipment, has no moving component, is automatically controlled, saves electric energy, is low in energy consumption and fault rate, and effectively reduces material cost and maintenance cost; an air pulse cleaning mode is adopted, and the situation that the foam concentration is low due to traditional clear liquid flushing is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical equipment technical field, concretely relates to a sulfur foam filtering device. BACKGROUND

[0002] At present, in the process of coal gas desulfurization treatment in domestic coking enterprises, the elemental sulfur concentration in the sulfur foam produced is generally low, and the mass ratio of elemental sulfur in the desulfurization foam is currently 2%-5%. In the further treatment process of sulfur foam, whether entering the sulfur melting kettle to melt sulfur or entering the incinerator to burn for acid production, a large amount of energy medium such as steam or coal gas will be consumed.

[0003] The main methods of traditional sulfur foam concentration are super centrifuge method and membrane filtration method. The super centrifuge method uses the centrifugal force generated by the super centrifuge to separate and concentrate the sulfur foam. The main problem of this method is that the super centrifuge equipment mainly uses German or Danish imported brands, which are high in price and difficult to maintain, and the failure rate is high because it is a dynamic device. The membrane filtration method uses ceramic or fiber membrane to concentrate partially by cross-flow filtration. The main problems of this method are membrane clogging and breakage during backwashing of the separation membrane. SUMMARY

[0004] In view of the deficiencies in the prior art, the utility model adopts a metal fiber filter tube and sets a thick slurry area below the filter to design a sulfur foam filtering device.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] A sulfur foam filtering device, comprising a filter tank, the filter tank is hollow inside to form a filter cavity, a liquid distributor, a filter tube and a clear liquid main pipe are sequentially arranged in the filter cavity from top to bottom; a discharge valve is arranged at the bottom of the filter tank, and the discharge valve is connected with a thickening tank; the clear liquid main pipe is connected with an air pulse backwashing system, and an outlet valve is arranged at the end of the air pulse backwashing system.

[0007] Further, an inlet, a scope, a manhole and a pressure measuring point are arranged at the top of the filter tank.

[0008] Further, the filter tube is a 316 metal fiber filter tube, which has multiple groups distributed in the filter cavity and is connected with the clear liquid main pipe through a quick connector.

[0009] Further, the discharge valve, the outlet valve, the inlet and the air pulse backwashing system are connected through a control cabinet.

[0010] Further, the air pulse backwashing system comprises a compressed air storage tank and a pulse valve.

[0011] Further, the bottom of the filter tank is formed with a thick slurry area below the clear liquid mother pipe.

[0012] The utility model has the advantages of:

[0013] 1. The 316L metal fiber filter pipe has good filtering effect and excellent acid and alkali resistance and pressure resistance. It can be repeatedly cleaned and used, saving materials and time for inspection and maintenance.

[0014] 2. The foam filter is a static device without moving components, saving energy, reducing material and maintenance costs, and having low energy consumption and failure rate.

[0015] 3. The foam filter is equipped with a computer for automatic control, which can accurately control the foam concentration.

[0016] 4. The air pulse cleaning method reduces the low foam concentration caused by traditional clear liquid flushing. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The utility model discloses a sulfur foam filtering device.

[0018] In the drawing: 1, filter tank; 2, liquid distributor; 3, filter pipe; 4, clear liquid mother pipe; 5, discharge valve; 6, thickening tank; 7, liquid outlet valve; 8, feed inlet; 9, sight glass; 10, manhole; 11, pressure measuring point; 12, quick coupling; 13, control cabinet; 14, compressed air storage tank; 15, pulse valve; 1a, filter cavity; 1b, thick slurry area. DETAILED DESCRIPTION

[0019] The utility model will be further described in detail in combination with examples, so that those skilled in the art can implement it according to the description. EXAMPLE

[0020] As Figure 1 shown, the utility model provides a sulfur foam filtering device, which comprises a filter tank 1, the filter tank 1 is hollow to form a filter cavity 1a, the filter cavity 1a is sequentially provided with a liquid distributor 2, a filter pipe 3 and a clear liquid mother pipe 4 from top to bottom; the bottom of the filter tank 1 is provided with a discharge valve 5, and the discharge valve 5 is connected with a thickening tank 6; the clear liquid mother pipe 4 is communicated with an air pulse backflushing system, and the end of the air pulse backflushing system is provided with a liquid outlet valve 7.

[0021] In the above embodiment, the top of the filter tank 1 is provided with a feed inlet 8, a sight glass 9, a manhole 10 and a pressure measuring point 11. The sulfur foam feed enters the filter tank 1 through the feed inlet 8 for filtration, the sight glass 9 facilitates observation of the foam filtration condition, the manhole 10 facilitates fault handling and maintenance by maintenance personnel, and the pressure measuring point 11 facilitates monitoring of the internal pressure of the filter tank 1 at any time to prevent overpressure operation of the filter tank.

[0022] In the above embodiment, the filter tube 3 is provided in the filter cavity 1a, and the filter tube 3 is a 316 metal fiber filter tube connected with the clear liquid main pipe 4 through a quick connector 12. The metal material can be repeatedly cleaned and used, reducing the use of consumables, and having good filtering effect while having excellent characteristics of acid and alkali resistance and pressure resistance. The filtered clear liquid is discharged out of the sulfur foam filter device through the clear liquid main pipe 4, and the quick connection mode greatly simplifies the time and cost of maintenance and repair.

[0023] In the above embodiment, the discharge valve 5, the liquid outlet valve 7, the feed inlet 8 and the air pulse backwashing system are connected through a control cabinet 13. The degree of automation is high, labor consumption is saved, the time of feeding and discharging is controlled by computer, and the purpose of accurately controlling the foam concentration is achieved.

[0024] In the above embodiment, the air pulse backwashing system includes a compressed air storage tank 14 and a pulse valve 15. The air pulse cleaning method is adopted to reduce the low foam concentration caused by traditional clear liquid flushing.

[0025] In the above embodiment, the bottom of the filter tank 1 is formed with a thick slurry area 1b below the clear liquid main pipe 4. The device of the present application adopts a static filtration method, and fully utilizes the physical characteristics that sulfur foam will slowly settle under static conditions in design. The thick slurry area 1b is arranged below the filter tank 1, and the discharge time is automatically controlled to further enrich the concentration. The clear liquid in the sulfur foam enters the clear liquid main pipe 4 after passing through the metal fiber filter tube 3, and the clear liquid is discharged by opening the liquid outlet valve 7 to return to the desulfurization system. The sulfur foam is deposited into the thick slurry area 1b at the bottom of the filter under the action of gravity, reaches a certain concentration after reaching the discharge time set by the computer, the discharge valve 5 is opened to discharge part of the thick foam, and the discharge valve 5 is closed to enter the next cycle.

[0026] The specific operation process of the sulfur foam filter device is as follows:

[0027] Material circulation process: close the discharge valve 5, open the inlet 8, the sulfur foam into the filter tank 1, the clear liquid in the sulfur foam, after the metal fiber filter tube 3, into the clear liquid main pipe 4, open the liquid valve 7 discharge clear liquid return desulfurization system; sulfur foam with gravity, sedimentation into the filter bottom thick slurry area 1b, reach the computer settings discharge time, reach a certain concentration, open the discharge valve 5 valve, part of the thick foam discharge outlet, close the discharge valve 5 valve, into the next cycle.

[0028] Overpressure protection process: the computer sets the overpressure discharge system, when the pressure measuring point 11 overpressure, directly open the discharge valve 5, ensure the safety of the equipment.

[0029] Air pulse backwashing process: when the overpressure protection is triggered or the air pulse backwashing is manually operated, the discharge valve 5, the liquid valve 7 and the inlet 8 are closed, the pulse valve 15 is opened, compressed air is quickly introduced into the clear liquid main pipe 4, and then is quickly released through the filter tube 3, so that the filter cake is removed. After the shock, the sulfur foam inlet valve 8 is opened, and the sulfur foam is used to flush the filter tank 1 again through the liquid distributor 2. All concentrated liquid is introduced into the sulfur foam thickening tank 6 through the discharge valve 5. After the cleaning is completed, the discharge valve 5 is closed, and the material circulation process is entered.

[0030] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and can be fully applied to various fields suitable for the present application. For those skilled in the art, other modifications can be easily realized, and therefore the present application is not limited to specific details, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A sulfur foam filtration apparatus, characterized by, The filter tank (1) is internally hollow to form a filter cavity (1a), which is sequentially provided from top to bottom with a liquid distributor (2), a filter tube (3) and a clear liquid main pipe (4); a discharge valve (5) is arranged at the bottom of the filter tank (1), and the discharge valve (5) is connected with a concentration tank (6); the clear liquid main pipe (4) is communicated with an air pulse backwashing system, and an end portion of the air pulse backwashing system is provided with a liquid outlet valve (7).

2. The sulfur foam filtration device of claim 1, wherein, The top of the filter tank (1) is provided with a feed inlet (8), a sight glass (9), a manhole (10) and a pressure measuring point (11). The filter tube (3) is a 316 metal fiber filter tube, which has multiple groups of distribution in the filter cavity and is connected with the clear liquid main pipe (4) through a quick connector (12).

3. The sulfur foam filtration apparatus of claim 1, wherein, The discharge valve (5), the liquid outlet valve (7), the feed inlet (8) and the air pulse backwashing system are connected through a control cabinet (13).

4. The sulfur foam filtration apparatus of claim 2, wherein, The air pulse backwashing system comprises a compressed air storage tank (14) and a pulse valve (15).

5. The sulfur foam filtration apparatus of claim 1, wherein, The bottom of the filter tank (1) is formed with a thick slurry area (1b) below the clear liquid main pipe (4).

6. The sulfur foam filtration apparatus of claim 1, wherein, ​

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