CN-121993803-A - Sludge incineration treatment system

Abstract

The invention relates to a sludge incineration treatment system, and belongs to the field of sludge treatment. The invention can improve the air supply quality through the double-sleeve type ash conveying pipeline, solves the problem that the pressure of the rear section in the traditional air supply system is small and is easy to block, and ensures the stability of the sludge feeding system by matching with high-pressure purging. By adding the wear-resistant protective sleeve at the elbow of the ash conveying pipeline, the normal operation of the equipment is ensured. Through the valve design structure, the flashboard is ensured not to be blocked because ash is accumulated in the supporting plate or the gap. Through designing the cooler cooling water line, the steam thermal efficiency of the circulating fluidized bed boiler is ensured. And an ash circulating system is added to send the carbon particles which are not completely combusted in the ash back to the hearth, so that the fuel utilization rate is improved.

Inventors

• Liang Xueshui
• CHEN ZEMING
• AN YAO
• WANG XIAODONG
• HU ANLONG
• ZHANG CHENGMING
• PENG BIN
• ZHAI JIAN
• WANG HAITAO
• XING HONGBO

Assignees

• 鲁泰纺织股份有限公司

Dates

Publication Date

20260508

Application Date

20260409

Claims (7)

1. 1. A sludge incineration treatment system is characterized by comprising a sludge feeding system (1), an incineration system (2) and an ash slag delivery system (3), wherein the sludge feeding system (1) adopts a continuous conveyor (11) to convey sludge in a sludge bin to the incineration system (2) through an ash conveying pipeline, the ash conveying pipeline adopts a sleeve pipe, one end of an ash conveying outer sleeve pipe (12) is connected with the continuous conveyor (11), the other end of the ash conveying outer sleeve pipe is connected with the incineration system (2), one end of an ash conveying inner sleeve pipe (13) is connected with a fan, the other end of the ash conveying inner sleeve pipe penetrates into the ash conveying outer sleeve pipe (12) from the rear end of an elbow of the ash conveying outer sleeve pipe (12) to the front end of the next elbow, an air conveying head (121) is arranged at the inner section of the ash conveying outer sleeve pipe (12), and a wear-resistant protective sleeve (14) is wrapped at each elbow of the ash conveying outer sleeve pipe (12); The ash discharging system (3) comprises a high-temperature protection pipe (31), a high Wen Jieduan valve (32), a sleeve cooler (33), an expansion joint (34), an emergency ash discharging valve (35), an expansion sealing device (36), a rotary ash cooler (37), a conveying belt conveyor (38) and an ash warehouse (39), wherein the high-temperature protection pipe (31) is a sleeve type protection pipe, an inner pipe of the high-temperature protection pipe is connected with the incineration system (2), an outer pipe of the high-temperature protection pipe is connected with the high Wen Jieduan valve (32), a vertically downward ash falling pipeline (5) is arranged behind the high-temperature protection valve (32), the sleeve cooler (33) is wound on the upper portion of the ash falling pipeline (5), the expansion joint (34) is arranged in the middle of the ash falling pipeline (5), the emergency ash discharging valve (35) is arranged at the lower end of the ash falling pipeline (5), the front of the emergency ash discharging valve (35) is connected with the rotary ash cooler (37) through the conveying pipeline, the expansion sealing device (36) is arranged on the ash conveying pipeline, and the ash conveyer (37) conveys ash to the ash warehouse (39) through the rotary ash cooler (38).
2. 2. A sludge incineration disposal system according to claim 1, characterised in that the ash-conveying outer sleeve (12) is provided with high-pressure blowing lines (15) every three to five meters and before the elbow.
3. 3. The sludge incineration treatment system according to claim 1, wherein the high-temperature cut-off valve (32) adopts a gate valve structure, the cavity is a bucket cavity with a wide upper part and a narrow lower part, the gate plate is arranged at the upper part of the cavity, and the support rod is arranged below the gate plate.
4. 4. A sludge incineration disposal system according to claim 1, characterised in that a wear-resistant filler is filled between the wear-resistant protective sleeve (14) and the elbow, the wear-resistant filler being a special additive of refractory material.
5. 5. A sludge incineration disposal system according to claim 1, characterised in that the incineration system (2) is a circulating fluidized bed boiler in which a steam generating system (4) is arranged, and the cooling water outlet of the jacket cooler (33) is connected to the steam generating system (4).
6. 6. The sludge incineration treatment system according to claim 1, wherein an ash circulation system (6) is connected behind the rotary ash cooler (37), the ash circulation system (6) comprises a screening device (61) and a slag crusher (62), the rotary ash cooler (37) is connected with the screening device (61), the screening device (61) conveys screened fine ash to the sludge feeding system (1), coarse ash to the slag crusher (62) and crushed coarse ash is input into the screening device (61).
7. 7. The sludge incineration treatment system according to claim 6, wherein the ash recycling system (6) controls the recycling ash amount by means of the furnace pressure difference and the recycling ash amount, wherein the recycling ash amount=boiler ash amount-sludge amount, and wherein the relationship between the boiler ash amount and the furnace pressure difference is that the boiler ash amount=ash amount fixed constant+0.01 furnace pressure difference.

Description

Sludge incineration treatment system Technical Field The invention relates to a sludge incineration treatment system, and belongs to the field of sludge treatment. Background The incineration treatment in the sludge treatment is a common treatment mode, incineration equipment is various, and the sludge is introduced into a circulating fluidized bed boiler as ash to be incinerated, so that the sludge can be treated, the ash use cost can be reduced, and the sludge treatment system is a mature and advanced sludge treatment system in recent years. However, the system has the following defects that in the sludge feeding process, pipelines are easy to block, and abrasion is easy to cause material leakage, so that the normal operation of the circulating fluidized bed boiler is seriously influenced. After the sludge is used as ash, the ash circulation flow in the boiler is changed, and the continuous sludge is replenished, so that the ash is not required to circulate in the boiler, the high Wen Huifen discharged out of the boiler enables the subsequent pipeline and the valve to be in a high-temperature environment with the temperature of more than 400 ℃ for a long time, and the valve is often damaged, and the pipeline is broken and leaks. Disclosure of Invention In light of the background, the problems to be solved by the present invention are: The pipeline is easy to be blocked or worn in the sludge conveying process to cause material leakage, and the pipeline and the valve are damaged by Wen Huifen. In order to achieve the above purpose, the present invention provides the following technical solutions: The sludge incineration treatment system comprises a sludge feeding system, an incineration system and an ash slag delivery system, wherein the sludge feeding system adopts a continuous conveyor to convey sludge in a sludge bin to the incineration system through an ash conveying pipeline, the ash conveying pipeline adopts a sleeve pipe, one end of an ash conveying outer sleeve pipe is connected with the continuous conveyor, and the other end of the ash conveying outer sleeve pipe is connected with the incineration system; The ash slag discharging system comprises a high-temperature protection pipe, a high Wen Jieduan valve, a sleeve cooler, an expansion joint, an emergency ash discharging valve, an expansion sealing device, a rotary ash cooler, a conveying belt conveyor and an ash slag warehouse, wherein the high-temperature protection pipe is a sleeve protection pipe, an inner pipe of the high-temperature protection pipe is connected with the incineration system, an outer pipe of the high-temperature protection pipe is connected with the high Wen Jieduan valve, a vertical downward ash falling pipeline is arranged behind the high-temperature cut-off valve, the sleeve cooler is wound on the upper part of the ash falling pipeline, the expansion joint is arranged in the middle of the ash falling pipeline, the emergency ash discharging valve is arranged at the lower end of the ash falling pipeline, the front of the emergency ash discharging valve is connected with the rotary ash cooler through the ash conveying pipeline, the expansion sealing device is arranged on the ash conveying pipeline, and the rotary ash cooler conveys ash slag to the ash slag warehouse through the conveying belt conveyor. Preferably, the ash-conveying outer sleeve is provided with high-pressure blowing lines at intervals of three to five meters and in front of the elbow. Preferably, the high-temperature cut-off valve adopts a gate valve structure, the valve body is a bucket cavity with a wide upper part and a narrow lower part, the gate plate is arranged on the upper part of the cavity, and the support rod is arranged below the gate plate. Preferably, a wear-resistant filler is filled between the wear-resistant protective sleeve and the elbow, and the wear-resistant filler adopts a special additive of a refractory material. The special additive for the refractory material is produced by Shandong Kaixin refractory material limited company, and the main components of the special additive are aggregate, micropowder, coagulant, bonding agent and other additive assistants. Preferably, the incineration system is a circulating fluidized bed boiler, a steam generation system is arranged in the circulating fluidized bed boiler, and a cooling water outlet of the sleeve cooler is connected with the steam generation system. Preferably, the rotary ash cooler is connected with an ash circulating system, the ash circulating system comprises a screening device and a slag crusher, the rotary ash cooler is connected with the screening device, the screening device conveys screened fine ash to a sludge feeding system, coarse ash to the slag crusher, and the coarse ash is crushed and then is input into the screening device. Preferably, the ash circulating system controls the recovered ash amount through the hearth pressure difference and the circulating ash amount,