CN212901527U - Novel modularization sludge drying incineration device - Google Patents

Abstract

The utility model relates to the technical field of sludge treatment, in particular to a novel modularized sludge drying and burning treatment device, which comprises a dryer with a feed inlet, a burning furnace, a circulating fan, a waste heat recovery module and a flue gas purification module; the upper end part of the dryer is provided with an air inlet and an air outlet, and the lower end part of the dryer is provided with a discharge hole; the high-temperature gas generating port of the incinerator is communicated with the gas inlet of the dryer, and a feeding mechanism is arranged between the discharge port of the dryer and the feed inlet of the incinerator; a flue gas generating port of the incinerator is communicated with a first air return port of the waste heat recovery module, and an exhaust port of the dryer is communicated with a second air return port of the waste heat recovery module through a circulating fan; the waste gas port of the waste heat recovery module is communicated with the flue gas purification module; compared with the prior art, the device has the advantages of low cost, small occupied area, convenience in installation and low treatment cost, is suitable for independently constructing sludge treatment devices in small and medium-sized sewage plants, and can be copied in multiple sets in large-sized sewage plants.

Description

Novel modularization sludge drying incineration device

Technical Field

The utility model relates to a sludge treatment technical field, concretely relates to novel modularization sludge drying incineration disposal device.

Background

According to statistics, the amount of sludge generated in China every year exceeds 5000 million tons, which is an important aspect of solid waste treatment and environmental management and a difficulty faced by various sewage treatment plants. At present, the sludge treatment modes mainly comprise: aerobic composting, anaerobic fermentation, landfill, drying incineration and the like. Composting and landfill methods are rarely used today because of their inherent disadvantages. The domestic predominant treatment process is anaerobic fermentation and drying incineration. The anaerobic fermentation process is suitable for large-scale treatment, the project investment is large, the occupied area is large, the residue after fermentation is difficult to dispose, and the reduction is inferior to that of the incineration process. Relatively speaking, the drying incineration process has obvious advantages, the reduction and the resource harmlessness are the most thorough, and the application is the most.

Generally, sludge drying requires an external heat source, so that domestic projects for cooperatively treating sludge are more, such as power plant boilers, cement kilns, garbage incinerators and the like for cooperatively treating sludge by using incineration. The separately constructed sludge drying and incinerating projects are few, because auxiliary fuel needs to be added, the operation cost is high, the project investment amount is large, the designed treatment scale is large, and the method is not suitable for single small and medium-sized sewage treatment plants.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to present not enough, provide a novel modularization sludge drying incineration disposal device, the device has synthesized sludge drying and the function of burning, realizes the modularized design, sled dress structure, and is miniaturized.

The purpose of the utility model is realized through the following technical scheme: the application provides a novel modularized sludge drying and incinerating treatment device which comprises a dryer with a feed inlet, an incinerator, a circulating fan, a waste heat recovery module and a flue gas purification module; the upper end part of the dryer is provided with an air inlet and an air outlet, and the lower end part of the dryer is provided with a discharge hole; the incinerator is provided with a high-temperature gas generating port and a flue gas generating port, the high-temperature gas generating port of the incinerator is communicated with the gas inlet of the dryer, and a feeding mechanism is arranged between the discharge port of the dryer and the feed inlet of the incinerator; the waste heat recovery module is provided with a first air return port, a second air return port and a waste gas port, a flue gas generation port of the incinerator is communicated with the first air return port of the waste heat recovery module, and an exhaust port of the dryer is communicated with the second air return port of the waste heat recovery module through a circulating fan; and the waste gas port of the waste heat recovery module is communicated with the flue gas purification module.

Wherein, a feed hopper is arranged above the feed inlet of the dryer, and a rotary feeder is arranged between the feed hopper and the feed inlet of the dryer.

Wherein, the top in the desiccator is provided with a plurality of cigarette folding plates of interval arrangement.

Wherein, the inner wall of the dryer is coated with a refractory material for heat preservation.

Wherein, feeding mechanism includes the scraper blade machine that the slope set up and the screw feeder of level setting, scrapes the discharge gate intercommunication of the one end of scraper blade machine and desiccator, scrapes the other end of scraper blade machine and screw feeder's top intercommunication, screw feeder's end and burn burning furnace intercommunication.

Wherein, the waste heat recovery module is including the air heater pipe case that is used for the heat transfer.

Wherein, the flue gas purification module comprises a semi-dry deacidification tower, a bag-type dust remover, an air compressor, an induced draft fan and a chimney which are sequentially communicated.

The utility model has the advantages that: according to the working process of the novel modularized sludge drying and incinerating treatment device, sludge is conveyed into the drier, the drier slowly rotates and stirs materials, the sludge discharged from the discharge port is conveyed to a hearth of the incinerator through the feeding mechanism for incineration, and then dry sludge is discharged; the circulating fan pumps out a part of high-temperature flue gas produced by the incinerator and conveys the high-temperature flue gas to the dryer to be used as a drying heat source, the high-temperature flue gas exchanges heat with sludge and then is discharged to the waste heat recovery module, other flue gas produced by the incinerator is directly discharged to the waste heat recovery module, the waste heat recovery module recovers the waste heat of the flue gas, and finally the flue gas is purified by the flue gas purification module and then is discharged to the atmosphere;

compared with the prior art, the drying and incineration treatment device has the advantages that the functions of sludge drying and incineration are integrated, the modularized design is realized, the skid-mounted structure is realized, the structure is simple, the optimization, the improvement and the innovation are performed on the aspects of equipment design, system integration and the like, the cost is low, the occupied area is small, the installation is convenient and fast, the treatment cost is low, the sludge treatment device is suitable for independently constructing sludge treatment devices in small and medium-sized sewage plants, and multiple sets of replication can be performed in large-sized sewage plants.

Drawings

FIG. 1 is a schematic structural diagram of a novel modularized sludge drying and incinerating treatment device.

Reference numerals: the system comprises a dryer 1, an incinerator 2, a circulating fan 3, a waste heat recovery module 4, a flue gas purification module 5, a feed hopper 6, a rotary feeder 7, a scraper conveyor 8 and a screw feeder 9.

Detailed Description

The invention will be further described with reference to the following examples.

The utility model discloses a novel modularization sludge drying incineration disposal device's embodiment, please see FIG. 1, this embodiment explains with one set of drying incineration disposal device as an example, and its handling capacity is 60t/d (the moisture content is about 80%), and assay sludge's high order calorific capacity (dry basis) is about 3200 kcal/kg.

Referring to fig. 1, the processing device comprises a dryer 1 with a feeding hole, an incinerator 2, a circulating fan 3, a waste heat recovery module 4, a flue gas purification module 5, a feeding hopper 6, a rotary feeder 7, a scraper conveyor 8 and a screw feeder 9.

In the present embodiment, the upper end of the dryer 1 is provided with an air inlet and an air outlet, and the lower end of the dryer 1 is provided with a discharge port. In order to add materials conveniently and realize closed feeding, a feed hopper 6 is arranged above the feed inlet of the dryer 1, a rotary feeder 7 is arranged between the feed hopper 6 and the feed inlet of the dryer 1, and the rotary feeder 7 is provided with a hydraulic gate valve. The top in the desiccator 1 is provided with the cigarette board of a plurality of intervals arrangements, can prolong the dwell time of flue gas. A double-helix blade is arranged in the dryer 1, and a material cutting blade with a stirring function is welded on the helix blade.

In this embodiment, to avoid excessive heat loss, the inner wall of the dryer 1 is coated with a refractory material for heat insulation.

Referring to fig. 1, the incinerator 2 is provided with a high-temperature gas generating port and a flue gas generating port, the high-temperature gas generating port of the incinerator 2 is communicated with a gas inlet of the dryer 1, and a feeding mechanism is arranged between a discharge port of the dryer 1 and a feed inlet of the incinerator 2. The waste heat recovery module 4 is provided with a first return air port, a second return air port and a waste gas port, the flue gas generating port of the incinerator 2 is communicated with the first return air port of the waste heat recovery module 4, and the exhaust port of the dryer 1 is communicated with the second return air port of the waste heat recovery module 4 through the circulating fan 3. The specific path of circulating flue gas is as follows: the circulating fan 3 pumps out a part of high-temperature flue gas at the upper part of the incinerator 2, the high-temperature flue gas is fed from the tail end of the dryer 1, exchanges heat with sludge and is discharged from the front end. The temperature of the flue gas at the air inlet of the dryer 1 is about 1000 ℃, and the temperature of the flue gas at the air outlet of the dryer 1 is about 500 ℃. The exhausted flue gas is returned to the waste heat recovery module 4 for waste heat utilization. The flue gas quantity can be adjusted by adjusting a flue air door and a fan frequency converter. When the spiral rotating speed is constant, the circulating smoke gas amount is adjusted, and the moisture content of sludge at the outlet of the dryer can be flexibly adjusted by adjusting the frequency of the circulating fan.

In this embodiment, the feeding mechanism includes the scraper 8 that sets up in an inclined manner and the screw feeder 9 that sets up horizontally, and the one end of scraper 8 communicates with the discharge gate of desiccator 1, and the other end of scraper 8 communicates with the top of screw feeder 9, and the end of screw feeder 9 communicates with incinerator 2. After the sludge is dried, the water content is reduced to 40-50%, and the sludge is discharged from the dryer 1. Sent into the fluidized bed incinerator 2 through a scraper conveyor 8 and a screw feeder 9. The incinerator 2 is a fully heat-insulated hearth, the inner diameter phi of the dilute phase region is 1800mm, and the height of the hearth is about 6 m. The dense-phase area is designed with a water-cooling air distribution plate, and the ignition is carried out under the bed. The combustion temperature of the furnace is generally controlled at 950 ℃ and 1100 ℃. The sludge can be self-sustained in the furnace without adding auxiliary fuel. An emergency spray cooling and denitration nozzle and an emergency explosion door are designed on the upper part of the hearth.

In the present embodiment, the waste gas outlet of the waste heat recovery module 4 is communicated with the flue gas purification module 5. The waste heat recovery module 4 comprises four groups of air preheater pipe boxes, a primary air fan, a secondary air fan and the like, is vertically arranged and is integrated on a base. The heat energy of the high-temperature flue gas is recovered through the heat exchange of the air preheater, and primary hot air and secondary hot air required by combustion are provided for the incinerator 2. The temperature of the hot air reaches 350 ℃, and the temperature of the outlet smoke is about 250 ℃. The flue gas purification module 5 comprises main equipment such as a semi-dry deacidification tower, a bag-type dust remover, an air compressor, an induced draft fan and the like, and auxiliary equipment such as a desulfurizer storage bin, a spray water pump, a water tank and the like, and is in centralized horizontal layout. The pollutant emission of the flue gas after desulfurization and dust removal treatment reaches the standard.

In the working process of the novel modularized sludge drying and incinerating treatment device, sludge is conveyed into the dryer 1, the dryer 1 slowly rotates and stirs materials, the sludge discharged from the discharge port is conveyed to the hearth of the incinerator 2 through the feeding mechanism for incineration, and then the dry sludge is discharged; and circulating fan 3 takes out and carries to desiccator 1 as the mummified heat source with partly high temperature flue gas that burns burning furnace 2 output, discharges waste heat recovery module 4 behind high temperature flue gas and the mud heat transfer, burns other flue gases of burning furnace 2 output and directly discharges waste heat recovery module 4, and waste heat recovery module 4 retrieves the waste heat of flue gas, and the flue gas is discharged to the atmosphere after purifying through gas cleaning module 5 at last. Compared with the prior art, the drying and incineration treatment device of the embodiment integrates the functions of sludge drying and incineration, realizes modular design, has a skid-mounted structure, has a simple structure, is optimized, improved and innovated in the aspects of equipment design, system integration and the like, has the advantages of low cost, small occupied area, convenience in installation and low treatment cost, is suitable for independently constructing sludge treatment devices in small and medium-sized sewage plants, and can be copied in multiple sets in large-sized sewage plants.

The above embodiments are only used for the explanation of the technical solution of the present invention, and can not be taken as the limitation of the structure of the present invention. Through this embodiment, the technical mode that also can obtain equal result of use through simple modification or equivalent replacement can be seen by ordinary skilled person and falls into the utility model discloses the right protection scope of technique.

Claims (7)

1. The utility model provides a novel modularization sludge drying incineration processing device which characterized in that: comprises a dryer with a feed inlet, an incinerator, a circulating fan, a waste heat recovery module and a flue gas purification module; the upper end part of the dryer is provided with an air inlet and an air outlet, and the lower end part of the dryer is provided with a discharge hole;

the incinerator is provided with a high-temperature gas generating port and a flue gas generating port, the high-temperature gas generating port of the incinerator is communicated with a gas inlet of the dryer, and a feeding mechanism is arranged between a discharge port of the dryer and a feed inlet of the incinerator;

the waste heat recovery module is provided with a first air return port, a second air return port and a waste gas port, the flue gas generation port of the incinerator is communicated with the first air return port of the waste heat recovery module, and the exhaust port of the dryer is communicated with the second air return port of the waste heat recovery module through a circulating fan; and the waste gas port of the waste heat recovery module is communicated with the flue gas purification module.

2. The novel modularized sludge drying and incinerating treatment device according to claim 1, is characterized in that: the top of the feed inlet of desiccator is provided with the feeder hopper, be provided with rotary feeder between the feed inlet of feeder hopper and desiccator.

3. The novel modularized sludge drying and incinerating treatment device according to claim 1, is characterized in that: the top in the desiccator is provided with a plurality of cigarette folding plates of interval arrangement.

4. The novel modularized sludge drying and incinerating treatment device according to claim 1, is characterized in that: the inner wall of the dryer is coated with a refractory material for heat preservation.

5. The novel modularized sludge drying and incinerating treatment device according to claim 1, is characterized in that: the feeding mechanism comprises a scraper machine and a screw feeder, wherein the scraper machine is obliquely arranged, the screw feeder is horizontally arranged, one end of the scraper machine is communicated with a discharge hole of the dryer, the other end of the scraper machine is communicated with the initial end of the screw feeder, and the tail end of the screw feeder is communicated with the incinerator.

6. The novel modularized sludge drying and incinerating treatment device according to claim 1, is characterized in that: the waste heat recovery module comprises an air preheater channel for heat exchange.

7. The novel modularized sludge drying and incinerating treatment device according to claim 1, is characterized in that: the flue gas purification module comprises a semi-dry deacidification tower, a bag-type dust remover, an air compressor, an induced draft fan and a chimney which are sequentially communicated.

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