CN211688771U

CN211688771U - Sludge drying treatment device

Info

Publication number: CN211688771U
Application number: CN201922444652.5U
Authority: CN
Inventors: 劳燕雯; 黄舒; 吉世明; 周秀霞; 康兆雨
Original assignee: Guangzhou Zhongke Jianyu Environment Protection Co ltd
Current assignee: Guangzhou Zhongke Jianyu Environment Protection Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-10-16
Anticipated expiration: 2029-12-27

Abstract

A sludge drying treatment device relates to the field of drying devices, in particular to a sludge drying treatment device which comprises a first conditioning tank and a second conditioning tank, wherein the first conditioning tank is communicated with the second conditioning tank, the first conditioning tank is provided with a sludge inlet, the first conditioning tank is communicated with a first aeration pipe for injecting ozone, a second aeration pipe for injecting air is further arranged below the first aeration pipe, the second conditioning tank is provided with a feeding pipe for conveying desulfurization ash and slag generated by a circulating fluidized bed boiler, a stirrer is arranged in the second conditioning tank, the sludge is stirred by the ozone, the air and the desulfurization ash and slag generated by the circulating fluidized bed boiler, no additional iron mud is required to be introduced, the use of raw materials is reduced, and the introduced ozone and the air can play a role in stirring the sludge and are fully mixed; in addition, the first aeration pipe is arranged above the second aeration pipe, so that the oxidation and corrosion of ozone to the first aeration pipe are avoided.

Description

Sludge drying treatment device

Technical Field

The utility model relates to a mummification device field, concretely relates to sludge drying processing apparatus.

Background

Sludge is a general term for precipitates, particles and floating materials generated when wastewater is treated by physical, chemical, physicochemical and biological methods. The sludge contains a large amount of toxic and harmful substances such as organic matters, pathogens, heavy metals and the like, and the sludge occupies huge volume due to the characteristic of extremely high water content. Therefore, sludge reduction is a focus problem in the current environmental engineering community.

The inherent characteristics of sludge cause sludge particles to form a network structure near the filter medium, thus preventing the sludge from settling and compressing, while the increasingly developed water treatment technology causes the sludge to be complicated, so that the sludge dewatering reduction is more difficult. At the same time, governments set more strict local standards in consideration of energy conservation and comprehensive utilization of dewatered sludge, so that various scholars are dedicated to developing more scientific sludge drying methods.

In view of the above, it is urgent to find a sludge drying treatment device which has a wider pH value adaptation range and is suitable for putting in coagulant aids which do not need to be treated. The utility model responds to the increasingly complex sludge dewatering requirement on the basis of the two-point problem.

SUMMERY OF THE UTILITY MODEL

In order to realize the purpose, the utility model discloses a sludge drying treatment device for splendid attire and treatment sludge drying reaction.

The technical scheme adopted by the utility model is as follows: the utility model provides a sludge drying processing apparatus, includes first recuperating pond and second recuperating pond, first recuperating pond intercommunication second recuperating pond, first recuperating pond is provided with into mud mouth, first recuperating pond leads to there is the first aeration pipe that is used for pouring into ozone, the below of first aeration pipe still is equipped with the second aeration pipe that is used for pouring into the air, the second recuperating pond is provided with the dog-house of the desulfurization lime-ash that carries circulating fluidized bed boiler to produce, be provided with the mixer in the second recuperating pond.

As a further improvement of the utility model, the second conditioning pool is still communicated with a high-pressure filter press, and a sludge delivery pump is arranged on the communication path of the second conditioning pool and the high-pressure filter press.

As a further improvement of the utility model, the squeezing pressure of the high-pressure filter press is more than or equal to 1.6 Mpa.

As a further improvement, the lower part of the high-pressure filter press is provided with a crusher used for crushing filter-pressed mud blocks, and the discharge port of the crusher is communicated with the feed port of the low-temperature drier.

As a further improvement, a transfer hopper used for temporarily storing mud blocks is further arranged between the high-pressure filter press and the crusher, and the transfer hopper is funnel-shaped with a large upper part and a small lower part.

As a further improvement of the utility model, a tail gas destruction chamber is arranged above the first conditioning pool.

As a further improvement of the utility model, the first aeration pipe is a titanium aeration pipe.

The utility model has the advantages that: the sludge is stirred by the ozone, the air and the desulfurization ash generated by the circulating fluidized bed boiler, no additional iron mud is required to be introduced, the use of raw materials is reduced, and the introduced ozone and the introduced air can play a role in stirring the sludge and are fully mixed; in addition, the first aeration pipe is arranged above the second aeration pipe, so that the oxidation and corrosion of ozone to the first aeration pipe are avoided.

Drawings

The present invention will be further described with reference to the accompanying drawings and embodiments.

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The sludge drying treatment device shown in fig. 1 comprises a first conditioning tank 1 and a second conditioning tank 2, wherein the first conditioning tank 1 and the second conditioning tank 2 both adopt a sealing structure. The first conditioning pool 1 is communicated with the second conditioning pool 2, and preferably, the communication position of the first conditioning pool 1 and the second conditioning pool 2 is positioned at the upper part of the side wall of the first conditioning pool 1. The first conditioning pool 1 is further provided with a sludge inlet 3, and preferably, the sludge inlet 3 is arranged below the side wall of the first conditioning pool 1. The sludge inlet 3 is used for inputting sludge, and the water content of the sludge is 85-88.5 percent. The first conditioning tank 1 is provided with a first aeration pipe 4, the first aeration pipe 4 is used for injecting ozone, and the ozone reacts with the sludge to complete the oxidation process. And a second aeration pipe 5 is arranged below the first aeration pipe 4, and the second aeration pipe 5 is used for injecting air for accelerating the rolling of the sludge so that the reaction of the sludge with ozone is more thorough. In order to prevent the overflow of the redundant ozone in the ozone process and cause air pollution, the upper end of the first conditioning pool 1 is also provided with a tail gas damage chamber, and the tail gas damage chamber is communicated with the first conditioning pool 1. The tail gas destruction chamber is a tail gas decomposition device commonly used in projects using ozone, and can be purchased as an existing product on the market. The input amount of the ozone is 30-100g per 1kg of absolutely dry sludge. Compared with Fenton oxidation, the action of ozone oxidation can adapt to a wider pH value range, and oxidation can be realized without introducing iron mud. In order to avoid the ozone from corroding the first aeration pipe 4, the first aeration pipe 4 is made of a titanium metal pipe.

Along with the continuous injection of mud into mud of mud inlet 3, mud flows to second conditioning pond 2 from the upper end of first conditioning pond 1. The position where the first conditioning pool 1 is communicated with the second conditioning pool 2 is positioned at the upper end, so that the time of the sludge in the first conditioning pool 1 is prolonged, and the ozone and the sludge can be reacted sufficiently. And a feeding pipe 6 is arranged in the second conditioning pool 2, and the feeding pipe 6 is used for feeding desulfurization ash generated by the circulating fluidized bed boiler. The desulphurisation ash may be fines collected from the flue gas of the circulating fluidized bed boiler and/or ash discharged after combustion. A stirrer 7 is arranged in the second conditioning pool 2 for stirring.

The yield of the desulfurized ash can meet the functional requirement of the modified fly ash without modification. The concrete expression is as follows:

(1) unlike free calcium oxide in coal powder furnace fly ash, the circulating fluidized bed filter desulfurization ash contains active calcium oxide, and can react with water to form calcium hydroxide, which is equal to lime and has coagulation effect;

(2) anhydrite contained in the circulating fluidized bed filtration desulfurization ash slag generates dihydrate gypsum when meeting water and participates in the reconstruction of the skeleton, so that new skeleton form substances are uniformly distributed in the sludge, and the porosity of the sludge is increased;

(3) the circulating fluidized bed boiler desulfurized ash has higher specific surface area and stronger adsorption capacity than pulverized coal furnace fly ash;

(4) calcium hydroxide and dihydrate gypsum formed by desulfurization ash of the circulating fluidized bed boiler in water excite the volcanic ash activity of the desulfurization ash of the circulating sulfur boiler, so that active silicon and aluminum are dissolved out to generate volcanic ash reaction, on one hand, the desulfurization ash participates in reconstructing a new framework, the sewage performance of sludge is improved, and on the other hand, heavy metal substances can be stabilized.

The second conditioning pool 2 is also communicated with a high-pressure filter press 8, and the high-pressure filter press 8 is a high-pressure plate-and-frame filter press. The high-pressure filter press 8 is used for dehydrating the sludge, so that the water content of the sludge is reduced to 30-40%, and the energy consumption of the subsequent drying step is greatly reduced. The pressing pressure of the high-pressure filter press 8 needs to be 1.6Mpa or more. In order to facilitate the transportation of the sludge, a sludge transfer pump 9 is arranged on a communication path between the second conditioning tank 2 and the high-pressure filter press 8. The sludge transfer pump 9 can select a slurry pump.

Further, the utility model discloses still include sewage treatment system 12, sewage treatment system 12 and high pressure filter 8 intercommunication. Due to the characteristics of the structure of the high-pressure filter press 8, the filtrate outflow modes are open flow filtration and dark flow filtration, in the open flow filtration, a water nozzle is arranged on a liquid outlet hole below each filter plate, and the filtrate flows out from the water nozzle directly; in the dark current filtration, a liquid outlet channel hole is arranged below each filter plate, liquid outlet holes of a plurality of filter plates are connected into a liquid outlet channel and are discharged by a pipeline connected with the liquid outlet holes below the thrust plate. The sewage treatment system 12 needs to be communicated with a water nozzle or a pipeline to realize the drainage effect.

The sewage treatment system 12 is also communicated with a low-temperature drying chamber 13, and the low-temperature drying chamber 13 is equipment for performing secondary drying treatment on the mud cakes which are subjected to pressure filtration by the high-pressure filter press 8. Specifically, a crusher 10 is arranged below the high-pressure filter press 8, and the crusher 10 is used for crushing a mud cake after filter pressing by the high-pressure filter press 8, so that the situation that the mud cake is too large in volume and cannot enter the low-temperature drying chamber 13 or the mud cake is not uniformly dried in the low-temperature drying chamber 13 is avoided. A transfer hopper is arranged between the high-pressure filter press 8 and the crusher 10, the transfer shaft is used for temporarily storing mud blocks, and the transfer hopper is funnel-shaped with a large upper part and a small lower part. The low-temperature drying chamber 13 is arranged below the middle rotating hopper, and a discharge hole of the crusher 10 is communicated with a feed hole of the low-temperature drying machine. The sewage treatment system 12 is communicated with the low-temperature drying chamber 13 for collecting polluted condensed water, and a sewage purification structure is arranged at the tail end of the sewage treatment system 12. The sewage purification structure can adopt the existing products. The preferred wastewater treatment system 12 is a water pipe.

The utility model discloses in, because throwing of ozone, desulfurization lime-ash, the mummification effect obtains great promotion, and the mud water content after the filter-pressing falls to 30-40%, and the mud water content that obtains in comparison with conventional filter-pressing has reduced 20-30%, has reduced the mummification power consumption at back, has reduced the mummification time, adopts low temperature mummification room 13 to carry out final mummification moreover, need not conditions such as heat source, has reduced the sludge treatment cost.

The utility model discloses can also add control system 14, empty through the singlechip that has logic storage capacity and logical operational capability, realize full automation and implement.

The above description is only a preferred embodiment of the present invention, and does not limit the scope of the present invention.

Claims

1. A sludge drying treatment device is characterized in that: including first recuperating pond (1) and second recuperating pond (2), first recuperating pond (1) intercommunication second recuperating pond (2), first recuperating pond (1) is provided with into mud mouth (3), first recuperating pond (1) leads to there is first aeration pipe (4) that is used for pouring into ozone, the below of first aeration pipe (4) still is equipped with second aeration pipe (5) that are used for pouring into the air, second recuperating pond (2) are provided with dog-house (6) of the desulfurization lime-ash that carry circulating fluidized bed boiler to produce, be provided with mixer (7) in second recuperating pond (2).

2. The sludge drying treatment device according to claim 1, characterized in that: the second conditioning pool (2) is also communicated with a high-pressure filter press (8), and a sludge delivery pump (9) is arranged on a communication path between the second conditioning pool (2) and the high-pressure filter press (8).

3. The sludge drying treatment device according to claim 2, characterized in that: the pressing pressure of the high-pressure filter press (8) is more than or equal to 1.6 Mpa.

4. The sludge drying treatment device according to claim 2, characterized in that: the device is characterized by further comprising a sewage treatment system (12), wherein the sewage treatment system (12) is communicated with the high-pressure filter press (8), and the sewage treatment system (12) is further communicated with a low-temperature drying chamber (13).

5. The sludge drying treatment device according to claim 4, characterized in that: the lower part of the high-pressure filter press (8) is provided with a crusher (10) for crushing filter-pressed mud blocks, and a discharge hole of the crusher (10) is communicated with a feed inlet of the low-temperature drier.

6. The sludge drying treatment device according to claim 5, characterized in that: a transfer hopper for temporarily storing the mud blocks is further arranged between the high-pressure filter press (8) and the crusher (10), and the transfer hopper is funnel-shaped with a large upper part and a small lower part.

7. The sludge drying treatment device according to claim 1, characterized in that: and a tail gas destruction chamber is arranged above the first conditioning pool (1).

8. The sludge drying treatment device according to claim 1, characterized in that: the first aeration pipe (4) is a titanium aeration pipe.