Coking desulfurization filter-pressing salt extraction system

Abstract

The utility model discloses a coking desulfurization filter-pressing salt extraction system which comprises a desulfurization regeneration tower, a desulfurization liquid externally tangent pipeline, a thermal crystallization thickening device, a feeding automatic control valve, a filter press and a vibrating crystal slurry discharge promoting device, the thermal crystallization thickening device is connected with the desulfurization regeneration tower through a desulfurization liquid externally tangent pipeline, and the desulfurization regeneration tower, the thermal crystallization thickening device, the automatic feeding control valve and the filter press are connected in sequence; the vibration type crystal mush discharge promoting device is in butt joint between the discharge hole of the thickener and the feeding automatic control valve, and the vibration of the vibration type crystal mush discharge promoting device promotes the discharge of crystal mush materials accumulated at the inner bottom of the thickener. According to the utility model, the filter press is introduced for filter pressing, and the vibrating crystal mush discharge promoting device and the automatic feeding control valve are arranged at the front part of the filter press for smooth conveying, so that efficient automatic feeding and discharging can be realized, and the content of two salts in a desulfurization solution can be effectively controlled.

Description

TECHNICAL FIELD

[0001] The utility model belongs to coking desulfurization hydraulic filter salt technology field especially relates to a coking desulfurization filter press salt system. BACKGROUND

[0002] The desulfurization system adopts KXTT process, ammonia water is used as alkali source, hydrogen sulfide in coal gas is absorbed, and then through the action of catalyst, oxygen is used as oxidant, and after oxidation regeneration, thiosulfate and thiocyanate (hereinafter referred to as "two salts") are generated, dehydration is carried out by adopting three-foot horizontal centrifuge, and the final product is output, since the two salt dehydration process is intermittent manual feeding and discharging, the efficiency is low, the manual labor intensity is large, under the condition that the concentration of two salts in the solution is high, the two salts in the solution cannot be separated out in time, the salt concentration in the circulating solution is high, and the desulfurization efficiency is affected. SUMMARY

[0003] The utility model discloses a coking desulfurization filter press salt system, and through the introduction of filter press, vibration type crystal slurry promotes the discharger and the automatic control valve of feeding are set in the front part to carry out smooth material feeding, can realize efficient automatic feeding and discharging, and effectively control the two salt content in the desulfurization solution.

[0004] Technical scheme: in order to realize the above-mentioned purpose, a coking desulfurization filter press salt system of the utility model, including desulfurization regeneration tower, desulfurization liquid external cutting pipeline, hot crystallization thickening device, automatic control valve of feeding and filter press, the hot crystallization thickening device is connected with desulfurization regeneration tower through desulfurization liquid external cutting pipeline, and desulfurization regeneration tower, hot crystallization thickening device, automatic control valve of feeding and filter press are connected in proper order.

[0005] Further, the desulfurization liquid external cutting pipeline is arranged on the circulating liquid pipeline connected with the desulfurization regeneration tower and the absorption tower.

[0006] Further, the hot crystallization thickening device includes evaporation heater, crystallizer and thickener connected in sequence, the evaporation heater is connected with the desulfurization regeneration tower through the desulfurization liquid external cutting pipeline, and the thickener is connected with the filter press through the automatic control valve of feeding.

[0007] Further, it includes a discharge hopper, the discharge hopper is arranged below the filter press, and is used for receiving the filter cake product after filter pressing of the filter press.

[0008] Further, it includes a PLC control system, and the filter press and the automatic control valve of feeding are electrically connected and controlled by the PLC control system.

[0009] Further, the thickener is connected with the pressure filter, and the pressure filter is connected with the thickener through a vibrating type crystal slurry promoting discharge device and a feeding automatic control valve.

[0010] Further, the vibrating type crystal slurry promoting discharge device comprises a vibrating rod installed in a feeding pipe through a vibrating base, wherein the vibrating base is composed of an elastic base and a vibrator for driving the vibrating rod to vibrate, the feeding end of the feeding pipe is connected with the discharging opening of the thickener, the vibrating rod is arranged to extend into the bottom of the thickener from the discharging opening, and the discharging end of the feeding pipe, the elastic base and the feeding end of the feeding automatic control valve are fixedly connected.

[0011] Further, the elastic base is an elastic metal plate provided with mounting holes at edges, and uniformly distributed holes are arranged in the elastic metal plate to form a hollow structure.

[0012] Further, the pressure filter is a plate-frame pressure filter.

[0013] Further, the feeding automatic control valve is an electromagnetic valve.

[0014] Beneficial effects: the vibrating type crystal slurry promoting discharge device and the feeding automatic control valve are arranged in front of the pressure filter to realize smooth feeding, efficient automatic feeding and discharging, improve the feeding, salt extraction and discharging efficiency, effectively control the two salt content in the desulfurization solution, realize the two salt content in the circulating liquid within the qualified range, promote the absorption reaction of the absorption unit to proceed in the positive direction, improve the absorption efficiency, and ensure the qualified index of hydrogen sulfide in the coal gas after the desulfurization regeneration tower. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a flow structure diagram of the coking desulfurization pressure filter salt extraction system.

[0016] Figure 2 It is a structure schematic view of the vibrating type crystal slurry promoting discharge device arranged between the thickener and the feeding automatic control valve.

[0017] Figure 3 It is a whole structure schematic view of the vibrating type crystal slurry promoting discharge device. DETAILED DESCRIPTION

[0018] The utility model will be further described in connection with the drawings.

[0019] As Figure 1 and Figure 2As shown, a coking desulfurization filter pressing salt system, including desulfurization regeneration tower 1, desulfurization liquid outside pipe 2, hot crystallization thickening device 3, automatic control valve 4 and filter press 5, the hot crystallization thickening device 3 is connected with desulfurization regeneration tower 1 through desulfurization liquid outside pipe 2, the desulfurization regeneration tower 1, hot crystallization thickening device 3, automatic control valve 4 and filter press 5 are sequentially connected. The automatic control valve 4 and the filter press 5 are added to realize automatic feeding, in order to make the feeding process more smooth, prevent the existence of automatic control valve 4 from causing blockage, the utility model includes vibration type crystal slurry promoting device 9, the vibration type crystal slurry promoting device 9 is docked between the discharge port 33a of thickener 33 and automatic control valve 4, under the open state of automatic control valve 4, the crystal slurry material accumulated in the bottom of thickener 33 is discharged by the vibration of vibration type crystal slurry promoting device 9. Therefore, the utility model introduces filter press 5 to carry out filter pressing and sets vibration type crystal slurry promoting device 9 and automatic control valve 4 in front of filter press 5 to carry out smooth feeding, can realize efficient automatic feeding, unloading, improve feeding, salt extraction and unloading efficiency, can effectively control the two salt content in desulfurization solution, realize the two salt content in circulating liquid within the qualified range, promote the absorption unit absorption reaction to proceed in the positive direction, improve the absorption efficiency, ensure that the hydrogen sulfide index of coal gas after desulfurization regeneration tower 1 is qualified.

[0020] More specifically, as shown in the drawings, Figure 1 As shown, the desulfurization liquid outside pipe 2 is arranged on the circulating liquid pipe 6 connected with the absorption tower from the desulfurization regeneration tower 1, and the circulating liquid of the circulating liquid pipe 6 is sent to the absorption tower.

[0021] The hot crystallization thickening device 3 includes evaporation heater 31, crystallizer 32 and thickener 33 connected in sequence; the evaporation heater 31 is connected with the desulfurization regeneration tower 1 through the desulfurization liquid outside pipe 2; the thickener 33 is connected with the filter press 5 through the automatic control valve 4. When the desulfurization liquid passes through the hot crystallization thickening device 3, three operation stages of evaporation, crystallization and thickening are carried out at one time, and the formed crystal slurry material is then sequentially sent to the filter press 5 through the vibration type crystal slurry promoting device 9 and the automatic control valve 4 for filter pressing operation.

[0022] As shown in the drawings, Figure 1 The utility model includes unloading hopper 7, the unloading hopper 7 is set in the below of filter press 5, is used for receiving the filter cake product after filter pressing of filter press 5. The utility model includes PLC control system 8, and the filter press 5 and automatic control valve 4 are electrically connected and controlled by the PLC control system 8.

[0023] As shown in the drawings, Figure 2 And Figure 3As shown, the vibration type crystal slurry promoting discharging device 9 comprises a vibrating rod 93 installed in a conveying pipe 92 through a vibrating seat 91, the vibrating seat 91 is composed of an elastic base 91a and a vibrator 91b for driving the vibrating rod 93 to vibrate, the feeding end of the conveying pipe 92 is connected with the discharging port 33a of the thickener 33, the vibrating rod 93 extends into the inner bottom of the thickener 33 from the discharging port 33a, and the discharging end of the conveying pipe 92, the elastic base 91a and the feeding end of the automatic feeding control valve 4 are fixedly connected. The elastic base 91a is an elastic metal plate with mounting holes arranged at the edges, and a plurality of uniformly distributed holes 90 are arranged in the elastic metal plate to form a hollow structure type elastic base 91a. After the automatic feeding control valve 4 is opened, the vibrator 91b is started under the control of the PLC control system 8, and then drives the vibrating rod 93 to vibrate, promotes the crystal slurry material in the inner bottom of the thickener 33 to be discharged, avoids the unsmooth or blocked discharging, and the crystal slurry material enters the automatic feeding control valve 4 through the holes 90 when being conveyed through the conveying pipe 92.

[0024] Preferably, the filter press 5 is a plate and frame filter press, and the feeding process is closed without gas escaping, thereby reducing the odor in the room. After the plate and frame filter press is used, the salt extraction discharge is increased by 3-5 tons per day, and the content of two salts in the circulating liquid can be effectively controlled.

[0025] Preferably, the automatic feeding control valve 4 is an electromagnetic valve, which is easy to control.

[0026] The utility model improves the salt extraction plant discharging operation site environment, greatly reduces personnel labor intensity, and reduces the safety risk of discharging operation.

[0027] The above is only the preferred embodiment of the utility model, and it should be pointed out that: for ordinary skilled person in the art, without departing from the principle of the utility model, a number of improvements and refinements can be made, and these improvements and refinements should be regarded as the protection scope of the utility model.

Claims

1. A coking desulfurization filter pressing salt extraction system, characterized by: It comprises a desulfurization regeneration tower (1), a desulfurization liquid outer sheath pipeline (2), a hot crystallization thickening device (3), a feeding automatic control valve (4) and a filter press (5); the hot crystallization thickening device (3) is connected with the desulfurization regeneration tower (1) through the desulfurization liquid outer sheath pipeline (2), and the desulfurization regeneration tower (1), the hot crystallization thickening device (3), the feeding automatic control valve (4) and the filter press (5) are sequentially connected.

2. The coking desulfurization filter pressing salt extraction system according to claim 1, characterized in that: The desulfurization liquid outer sheath pipeline (2) is arranged on the circulating liquid pipeline (6) connected with the absorption tower from the desulfurization regeneration tower (1).

3. The coking desulfurization filter pressing salt extraction system according to claim 1, characterized in that: The hot crystallization thickening device (3) comprises an evaporation heater (31), a crystallizer (32) and a thickener (33) which are sequentially connected; the evaporation heater (31) is connected with the desulfurization regeneration tower (1) through the desulfurization liquid outer sheath pipeline (2); and the thickener (33) is connected with the filter press (5) through the feeding automatic control valve (4).

4. The coking desulfurization filter pressing salt extraction system according to claim 1, characterized in that: It comprises a discharge hopper (7) arranged below the filter press (5) and used for receiving the filter cake product filtered by the filter press (5).

5. The coking desulfurization filter pressing salt extraction system according to claim 1, characterized in that: It comprises a PLC control system (8), and the filter press (5) and the feeding automatic control valve (4) are electrically connected and controlled by the PLC control system (8).

6. The coking desulfurization filter pressing salt extraction system according to claim 1, characterized in that: It comprises a vibrating crystal slurry promoting device (9) which is connected between the discharge port (33a) of the thickener (33) and the feeding automatic control valve (4); under the open state of the feeding automatic control valve (4), the crystal slurry material accumulated in the bottom of the thickener (33) is discharged through the vibration of the vibrating crystal slurry promoting device (9).

7. The coking desulfurization filter pressing salt extraction system according to claim 6, characterized in that: The vibrating crystal slurry promoting device (9) comprises a vibrating rod (93) installed in a feeding pipe (92) through a vibrating seat (91); the vibrating seat (91) comprises an elastic base (91a) and a vibrator (91b) for driving the vibrating rod (93) to vibrate; the feeding end of the feeding pipe (92) is connected with the discharge port (33a) of the thickener (33), so that the vibrating rod (93) extends into the bottom of the thickener (33) from the discharge port (33a); and the discharge end of the feeding pipe (92), the elastic base (91a) and the feeding end of the feeding automatic control valve (4) are relatively fixedly connected.

8. The coking desulfurization filter pressing salt extraction system according to claim 7, characterized in that: The elastic base (91a) is an elastic metal plate provided with mounting holes in the edges, and a plurality of holes (90) are arranged in the elastic metal plate to form a hollow structure.

9. The coking desulfurization filter pressing salt extraction system according to any one of claims 1-8, characterized in that: The filter press (5) is a plate-and-frame filter press.

10. The coking desulfurization filter pressing salt extraction system according to any one of claims 1-8, characterized in that: The feeding automatic control valve (4) is an electromagnetic valve.

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