Incinerator for treating dried sludge

Abstract

The utility model belongs to the technical field of sludge treatment equipment, and particularly relates to an incinerator for treating dried sludge. The incinerator for treating the dried sludge comprises an incinerator body and is characterized in that a fragmentation disc is arranged on the upper portion of the incinerator body, a plurality of through holes are formed in the fragmentation disc, an auger screw is installed between the fragmentation disc and the incinerator body, a plurality of layers of inclined speed reducing plates are arranged below the fragmentation disc, and the side face of the incinerator body is connected with a first-stage washing tower and a second-stage washing tower. A first-stage spraying pipe is arranged in the first-stage washing tower, a second-stage spraying pipe is arranged in the second-stage washing tower, the first-stage washing tower is connected with a dehydration device, and the second-stage washing tower is connected with the first-stage washing tower through a circulating liquid return pipe. The sludge incineration device has the advantages that dried sludge becomes smaller through multi-stage smashing, the incineration efficiency of the dried sludge is higher and more thorough, meanwhile, flue gas waste heat generated by incineration is utilized to the maximum extent, waste water is avoided, and secondary pollution is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sludge treatment equipment technical field, especially related to a kind of incinerator of treatment dry sludge. BACKGROUND

[0002] Sludge incineration is a common sludge disposal method, it can destroy all organic matter, kill all pathogens, and minimize the volume of sludge, and the relative moisture content of incineration residue is about 75% of the original volume of sludge about 10%. Before sludge incineration, it should be dehydrated and dried generally to reduce the load and energy consumption. For dry sludge incineration, incinerator is usually used. Under the current technology, dry sludge is directly put into the incinerator. Due to the accumulation of sludge, the volume is large, the incineration efficiency is low, and the incineration effect is poor, which needs to be incinerated repeatedly for a long time. In addition, a large amount of heat in the flue gas generated by incineration is not effectively utilized, and a large amount of deacidification wastewater needs to be discharged to ensure efficient deacidification. SUMMARY

[0003] The utility model discloses in order to make up for the deficiency of prior art, provide a kind of efficiency, energy-saving, avoid secondary pollution's incinerator of treatment dry sludge.

[0004] The utility model discloses a kind of incinerators of treatment dry sludge, which is achieved by the following technical solutions:

[0005] A kind of incinerator of treatment dry sludge, including furnace body, it is characterized by: the upper portion of the furnace body is equipped with fragmentation disc, a plurality of through holes are formed in the fragmentation disc, auger is installed between fragmentation disc and furnace body, a plurality of layers of inclined speed reduction plate are equipped below fragmentation disc, primary washing tower and secondary washing tower are connected to the side surface of furnace body, a plurality of first spray pipes are arranged in primary washing tower, a plurality of second spray pipes are arranged in secondary washing tower, dehydration device is connected to primary washing tower, and secondary washing tower is connected to primary washing tower by circulating liquid return pipe.

[0006] The upper portion of the first spray pipe and the second spray pipe is respectively equipped with a demister.

[0007] Discharge pump is connected between one end of the primary washing tower and the dehydration device, and filter pump is connected between the other end of the dehydration device and the primary washing tower.

[0008] Secondary washing tower is connected to aeration fan.

[0009] The top of the inclined speed reduction plate is equipped with a triangular pyramid plate.

[0010] The top of the furnace body is equipped with a plurality of feeding pipes.

[0011] The lower portion of the furnace body is equipped with a discharge pipe, and a discharge valve is installed on the discharge pipe.

[0012] The auger screw is installed on the auger shaft, and the auger shaft is connected to the auger motor through the speed reducer.

[0013] The furnace body is provided with supporting legs at the bottom.

[0014] The dry sludge is broken into small pieces through multiple stages, so that the incineration efficiency is higher and more thorough, and the waste water is avoided, and secondary pollution is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model makes further explanation in combination with the drawings.

[0016] ATTACHED Figure 1 It is the structure schematic drawing of the utility model;

[0017] ATTACHED Figure 2 It is the structure schematic drawing of the utility model's inclined speed reduction board;

[0018] In the drawing, 1 is furnace body, 2 is broken disc, 3 is through hole, 4 is auger screw, 5 is inclined speed reduction board, 6 is primary washing tower, 7 is secondary washing tower, 8 is primary spray pipe, 9 is secondary spray pipe, 10 is dehydration device, 11 is circulating liquid return pipe, 12 is mist eliminator, 13 is discharge pump, 14 is filtrate pump, 15 is aeration fan, 16 is triangular taper plate, 17 is feed pipe, 18 is discharge pipe, 19 is discharge valve, 20 is auger shaft, 21 is speed reducer, 22 is auger motor, 23 is supporting leg. DETAILED DESCRIPTION

[0019] The drawings are a specific embodiment of the utility model. The embodiment includes furnace body 1, the upper portion of furnace body 1 is provided with broken disc 2, a plurality of through holes 3 are formed in broken disc 2, auger screw 4 is installed between broken disc 2 and furnace body 1, a plurality of layers of inclined speed reduction board 5 are arranged below broken disc 2, primary washing tower 6 and secondary washing tower 7 are connected to the side surface of furnace body 1, primary spray pipe 8 is arranged in primary washing tower 6, secondary spray pipe 9 is arranged in secondary washing tower 7, dehydration device 10 is connected to primary washing tower 6, and secondary washing tower 7 is connected to primary washing tower 6 through circulating liquid return pipe 11.

[0020] Mist eliminator 12 is arranged above primary spray pipe 8 and secondary spray pipe 9 respectively. Discharge pump 13 is connected between one end of primary washing tower 6 and dehydration device 10, and filtrate pump 14 is connected between the other end of dehydration device 10 and primary washing tower 6. Secondary washing tower 7 is connected to aeration fan 15.

[0021] Triangular taper plate 16 is arranged on the top of inclined speed reduction board 5. A plurality of feed pipes 17 are arranged on the top of furnace body 1. Discharge pipe 18 is arranged below furnace body 1, and discharge valve 19 is arranged on discharge pipe 18. Auger screw 4 is installed on auger shaft 20, and auger shaft 20 is connected to auger motor 22 through speed reducer 21. Supporting leg 23 is arranged at the bottom of furnace body 1.

[0022] The incinerator for treating dried sludge of the utility model, send dried sludge from feed pipe 17 into the upper portion of furnace body 1, start auger motor 22, give auger shaft 20 a big torque through speed reducer 21 and drive it to rotate, thereby drive auger screw 4 to rotate, give sludge a downward thrust, make the through hole 3 of sludge crushing disc 2 discharge, cut sludge into thin strips in this way, sludge discharged from through hole 3 falls down, in the falling process, it can be hit on inclined speed reduction plate 5, the top of inclined speed reduction plate 5 is integrally provided with triangular taper plate 16, cut thin strip sludge again, make it become smaller block, sludge can pass through multiple inclined speed reduction plates 5 in the falling process, make sludge be further cut at the same time, reduce its falling speed, make its incineration more thorough, incineration effect is better. The flue gas generated in the incineration process is introduced into primary washing tower 6, is cooled and is preliminarily deacidified through the spraying of process water in primary spray pipe 8, then the flue gas enters secondary washing tower 7, increases the volume of circulating pool of secondary washing tower 7, and is provided with aeration blower 15, oxidizes sulfite ion in circulating liquid into sulfate ion, and controls the concentration and PH value of circulating liquid, to ensure that the flue gas meets the discharge standard. The circulating liquid of secondary washing tower 7 is sent into the circulating pool of primary washing tower 6 through circulating liquid return pipe 11, is atomized after primary spray layer, and is fully contacted with high-temperature flue gas, and the circulating liquid is evaporated and concentrated using the heat of high-temperature flue gas. With the evaporation of water in circulating liquid, the concentration gradually increases, and crystallization is slowly formed and separated out; Through discharge pump 13, send into dehydration device 10, separate out impure salt, and the filtrate returns to primary washing tower 6 circulating pool through filtrate pump 14 and continues to concentrate. Open discharge valve 19, and the completely incinerated slag can be discharged through discharge pipe 18.

Claims

1. A furnace for incinerating dried sludge, comprising a furnace body (1), characterised in that: The upper portion of the furnace body (1) is provided with a crushing disc (2), a plurality of through holes (3) are formed in the crushing disc (2), a auger screw (4) is installed between the crushing disc (2) and the furnace body (1), a plurality of layers of inclined speed reduction plates (5) are arranged below the crushing disc (2), a first-stage washing tower (6) and a second-stage washing tower (7) are connected to the side surface of the furnace body (1), a first-stage spraying pipe (8) is arranged in the first-stage washing tower (6), a second-stage spraying pipe (9) is arranged in the second-stage washing tower (7), the first-stage washing tower (6) is connected with a dehydration device (10), and the second-stage washing tower (7) is connected with the first-stage washing tower (6) through a circulating liquid return pipe (11).

2. The incinerator for treating dried sludge according to claim 1, characterized by: The upper portions of the first-stage spraying pipe (8) and the second-stage spraying pipe (9) are respectively provided with mist eliminators (12).

3. The incinerator for treating dried sludge according to claim 1, characterized by: A discharge pump (13) is connected between the first-stage washing tower (6) and one end of the dehydration device (10), and a filtrate pump (14) is connected between the other end of the dehydration device (10) and the first-stage washing tower (6).

4. The incinerator for treating dried sludge according to claim 1, characterized by: The second-stage washing tower (7) is connected with an aeration fan (15).

5. The incinerator for treating dried sludge according to claim 1, characterized by: The top portions of the inclined speed reduction plates (5) are provided with triangular pyramid plates (16).

6. The incinerator for treating dried sludge according to claim 1, characterized by: The top portion of the furnace body (1) is provided with a plurality of feeding pipes (17).

7. The incinerator for treating dried sludge according to claim 1, characterized by: A discharge pipe (18) is arranged below the furnace body (1), and a discharge valve (19) is installed on the discharge pipe (18).

8. The incinerator for treating dried sludge according to claim 1, characterized by: The auger screw (4) is installed on an auger shaft (20), and the auger shaft (20) is connected with an auger motor (22) through a speed reducer (21).

9. The incinerator for treating dried sludge according to claim 1, characterized by: The bottom portion of the furnace body (1) is provided with supporting legs (23).

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