CN215929572U - System for refuse incineration deals with low temperature mummification mud in coordination - Google Patents

Abstract

The utility model discloses a system for co-processing low-temperature dried sludge by waste incineration, which comprises a sludge feeding device and the like, wherein the output end of the sludge feeding device is connected with the material inlet end of the low-temperature drying device, the material outlet end of the low-temperature drying device is connected with the inlet of the waste feeding device, the outlet end of the waste feeding device is connected with the material inlet of an incinerator, the flue gas outlet end of the incinerator is connected with the flue gas inlet end of a waste heat boiler, the flue gas outlet end of the waste heat boiler is connected with the inlet end of a flue gas purification device, the outlet end of the flue gas purification device is connected with the inlet of an induced draft fan, the outlet of the induced draft fan is connected with the flue gas inlet of a hot water-flue gas heat exchanger, the flue gas outlet of the hot water-flue gas heat exchanger is connected with a chimney, and the hot water-flue gas heat exchanger is bidirectionally communicated with the low-temperature drying device. The utility model reuses the waste heat in the purified flue gas treated by the flue gas purification device after incineration, fully saves energy and reduces the operation cost.

Description

System for refuse incineration deals with low temperature mummification mud in coordination

Technical Field

The utility model belongs to the technical field of sludge incineration treatment devices, and particularly relates to a system for sludge incineration cooperative treatment by domestic garbage incineration.

Background

Along with the rapid development of social economy and the continuous promotion of urbanization process, the discharge amount of urban sewage and industrial sewage is increased year by year, and the sludge output of sewage treatment plants is increased. The sludge of the sewage treatment plant has high water content and contains a large amount of organic matters, wherein various bacteria, viruses and parasitic organisms are parasitized, and meanwhile, heavy metal compounds such as zinc, copper, lead, cadmium and the like, toxic compounds, pesticides and the like are concentrated in the sludge, and if the sludge is poured randomly without regular treatment, the sludge not only pollutes the land and the river, but also possibly causes toxic and harmful components in the soil to enter a food chain, and seriously harms the health of surrounding residents. For the treatment of sludge in sewage treatment plants, China starts late, and compared with developed countries, the sludge treatment and disposal technology in China has a certain gap. The complex variability of the sludge structure determines that a certain difficulty exists in the efficient treatment of the sludge.

At present, several sludge treatment technologies have certain disadvantages, and in comparison, the incineration technology has the advantages of large treatment capacity, high efficiency, small occupied area, elimination of pathogens, thorough reduction, capability of recovering heat energy and the like, is mature, and gradually becomes a mainstream technology of sludge treatment in domestic various sludge treatment technologies due to the fact that the sludge treatment technologies are more and more large. The incineration of the sludge is divided into independent incineration and cooperative incineration, and the cooperative incineration can utilize the original incineration equipment, a matched flue gas treatment system and the like, and can utilize the steam of the original coal-fired power plant/cement plant/garbage power plant, so that the investment and operation cost are lower and the economy is better compared with the independent incineration, and therefore, the sludge incineration system is more widely applied to two-way and three-way cities.

The water content in the sludge is very high, the water content is usually about 80% after the sludge is dehydrated, the sludge has no calorific value, a large amount of water vapor can be generated when the sludge is heated, if the sludge directly enters an incinerator to be incinerated in cooperation with garbage, the temperature of a hearth can be reduced, certain corrosion is caused to equipment, if the sludge is dried and then enters the incinerator to be incinerated, the combustion efficiency can be improved, and the corrosion to the existing equipment is reduced. The existing waste incineration co-processing sludge mostly adopts low-pressure steam, a disc/blade drier is used for drying the sludge, the drying temperature is high, the generated dried waste gas contains a large amount of water vapor, the condensed waste gas enters an incinerator as secondary air, and in the process, waste water with high COD can be generated and part of heat is lost.

The temperature of the smoke discharged by the chimney in the garbage incineration is higher, most of the smoke is between 120 ℃ and 180 ℃, and the smoke is discharged at higher temperature, so that not only is the waste of heat caused, but also the air pollution is aggravated, and the climate is warmed.

Chinese patent CN 103435244A discloses a parallel sludge low-temperature drying method using flue gas waste heat, which utilizes the flue gas waste heat discharged by incineration, but because the discharged flue gas is directly contacted with sludge for drying, a large amount of waste gas is generated.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, reduce heat energy loss, fully utilize energy and reduce environmental pollution in the sludge drying process, the utility model provides a system for treating dried sludge by cooperating waste incineration with low temperature.

The utility model adopts the following technical scheme:

a system for co-processing low-temperature dried sludge by waste incineration comprises a sludge feeding device (1), a low-temperature drying device (2), a waste feeding device (5), an incinerator (6), a waste heat boiler (7), a flue gas purification device (8), an induced draft fan (9), a hot water-flue gas heat exchanger (4) and a chimney (10); the sludge feeding device (1) comprises a sludge input end and an output end, the output end of the sludge feeding device (1) is connected with the material inlet end of the low-temperature drying device (2), the outlet end of the material of the low-temperature drying device (2) is connected with the inlet of the garbage feeding device (5), the outlet end of the garbage feeding device (5) is connected with the inlet of the incinerator material (6), the flue gas outlet end of the incinerator (6) is connected with the flue gas inlet end of the waste heat boiler (7), the flue gas outlet end of the waste heat boiler (7) is connected with the inlet end of the flue gas purification device (8), the outlet end of the flue gas purification device (8) is connected with the inlet of the draught fan (9), the outlet of the draught fan (9) is connected with the flue gas inlet of the hot water-flue gas heat exchanger (4), and the flue gas outlet of the hot water-flue gas heat exchanger (4) is connected with the chimney (10), and the hot water-smoke heat exchanger (4) is communicated with the low-temperature drying device (2) in a bidirectional way.

Preferably, the low-temperature drying device (2) is communicated with the circulating cooling water device (3) in a two-way mode.

Preferably, the low-temperature drying device (2) comprises a slitter (21), a mesh belt conveyor (22), a cooler (23) and a heater (24), sludge enters the mesh belt conveyor (22) after being cut by the slitter (21), the mesh belt conveyor (22) is communicated with the cooler (23), the cooler (23) is communicated with the heater (24), and the heater (24) is communicated with the mesh belt conveyor (22); the cooler (23) is in bidirectional communication with the circulating cooling water device (3), and the heater (24) is in bidirectional communication with the hot water-smoke heat exchanger (4).

Preferably, the hot water-smoke heat exchanger (4) comprises an air inlet (4-1), an air outlet (4-2), a water inlet (4-3) and a water outlet (4-4), the air inlet (4-1) of the hot water-smoke heat exchanger (4) is connected with an outlet of an induced draft fan (9), the air outlet (4-2) is connected with a chimney (10), the water inlet (4-3) is connected with an outlet of a circulating water pump (11), the water outlet (4-4) is connected with a hot water inlet of the low-temperature drying device (2), and a hot water outlet of the low-temperature drying device (2) is connected with an inlet of the circulating water pump (11).

Preferably, an inlet pipeline of the circulating water pump (11) is connected with an outlet of the water replenishing pump (13), and an inlet of the water replenishing pump (13) is connected with the water replenishing tank (12).

Preferably, a bypass flue is additionally arranged between the induced draft fan (9) and the chimney (10), and a regulating valve is arranged on the flue.

Preferably, the hot water-flue gas heat exchanger (4) adopts a tube type heat exchanger, and the heat exchange tube adopts 2205 fluorine plastic steel composite tubes.

Preferably, the flow speed of the hot water-smoke heat exchanger (4) on the smoke side is 6-10 m/s.

Preferably, the heat exchange tube bundle of the hot water-smoke heat exchanger (4) adopts a vertical arrangement form and is provided with a sound wave soot blower.

Preferably, the incinerator (6) is of the circulating fluidized bed or grate type.

Compared with the prior art, the utility model has the following technical effects:

1. the utility model reuses the waste heat in the purified flue gas treated by the flue gas purification device after incineration, fully saves energy and reduces the operation cost.

2. Compared with other existing waste heat utilization technologies, the utility model utilizes the purified flue gas purified by the flue gas purification device, has little abrasion and corrosion to the heat exchanger, and can prolong the service life of the heat exchanger.

3. The drying device adopted by the system is low-temperature belt type drying, the drying temperature is low, air circulates in the drying system, waste heat is not discharged, and no odor is generated.

4. The system disclosed by the utility model is safer and more environment-friendly by using low-grade heat energy for sludge drying and adopting the medium of hot water at 85-90 ℃ compared with the method of adopting steam as a drying medium.

5. The dried sludge is in a large granular shape, and is not only suitable for a circulating fluidized bed incinerator, but also can be co-fired in a grate furnace.

6. Adopt this utility model system when the cooperative treatment of the existing waste incineration power plant implementation mud, need not to carry out big adjustment to existing equipment, save the investment.

Drawings

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.

FIG. 1 is a block flow diagram of the system of the present invention.

FIG. 2 is a flow chart of waste heat utilization of incineration exhaust flue gas.

Fig. 3 is a schematic diagram of a low-temperature drying device.

The reference numbers in the figures denote: 1. the system comprises a sludge feeding device, a low-temperature drying device, a circulating cooling water device, a hot water-flue gas heat exchanger, a waste heat boiler, a waste heat.

Detailed Description

The present invention is further illustrated by the following examples, which are not intended to limit the utility model to these embodiments. It will be appreciated by those skilled in the art that the present invention encompasses all alternatives, modifications and equivalents as may be included within the scope of the claims. As shown in fig. 1 to 3, the system for co-processing low-temperature dried sludge by waste incineration in this embodiment includes a sludge feeding device 1, a low-temperature drying device 2, a waste feeding device 5, an incinerator 6, a waste heat boiler 7, a flue gas purification device 8, an induced draft fan 9, a hot water-flue gas heat exchanger 4, a circulating water pump 11, a water replenishing tank 12, a water replenishing pump 13, and a chimney 10.

The sludge is discharged into the input end of a sludge feeding device 1, the output end of the sludge feeding device 1 is connected with the material inlet end of a low-temperature drying device 2, the material outlet end of the low-temperature drying device 2 is connected with the inlet of a garbage feeding device 5, the outlet end of the garbage feeding device 5 is connected with the inlet of an incinerator material 6, the flue gas outlet end of the incinerator 6 is connected with the flue gas inlet end of a waste heat boiler 7, the flue gas outlet end of the waste heat boiler 7 is connected with the inlet end of a flue gas purification device 8, the outlet end of the flue gas purification device 8 is connected with the inlet of an induced draft fan 9, the outlet of the induced draft fan 9 is connected with the flue gas inlet of a hot water-flue gas heat exchanger 4, and the flue gas outlet of the hot water-flue gas heat exchanger 4 is connected with a chimney 10.

The sludge feeding device 1 comprises a sludge receiving bin, a sludge storage bin, sludge conveying equipment and the like. The garbage feeding device 5 comprises a garbage grab bucket, a garbage feeding hopper and the like. The sludge feeding device and the garbage feeding device can adopt the existing equipment.

The dotted line in fig. 1 is enclosed by the existing equipment of the refuse incineration power plant of the reconstruction project.

The current incineration treatment process of the household garbage generally comprises the following steps: the household garbage enters the garbage feeding hopper through the grab bucket, then enters the incinerator through the conveying equipment and is fully combusted in the incinerator, the incineration flue gas recovers heat through the waste heat boiler and generates electricity, and the flue gas at the outlet of the waste heat boiler is treated by the flue gas purification device and then is discharged after reaching the standard through the chimney.

The utility model improves the prior conventional incineration treatment process: the domestic garbage is fully combusted in the incinerator 6, after being treated by the flue gas purification device 8, the clean flue gas which should be discharged into the chimney is introduced into the hot water-flue gas heat exchanger 4 through the induced draft fan 9, the heat in the flue gas is recycled for sludge drying, and the flue gas after heat exchange and temperature reduction is discharged into the atmosphere through the chimney 10. And a straight-through flue between the induced draft fan 9 and the chimney 10 is used as a bypass, and when the sludge humidity of the synergistic treatment is low or the sludge amount is low, the amount of flue gas entering the hot water-flue gas heat exchanger 4 is adjusted through a bypass air door.

The dewatered sludge with the water content of 60 percent to 80 percent is unloaded into a receiving bin by a sludge transport vehicle, then is sent into a sludge storage bin by a mechanical conveying device such as a sludge conveying pump or a screw conveyor, and then is sent into a sludge low-temperature drying device 2 by sludge conveying equipment. The water content of the sludge discharged into the sludge feeding device 2 is 60-80%, and the water content after drying by the low-temperature drying device 2 is about 30%.

The water content of the dried sludge is reduced to about 30 percent, and then the sludge is sent into a feed inlet of a garbage incinerator 6 through a belt or a screw conveyor with a weighing device, and is mixed with household garbage according to a certain proportion and incinerated. The mixing ratio of the wet sludge to the household garbage is 5-10%.

The air used for drying circulates in the system, no waste gas is generated, only a small amount of condensed wastewater is generated, and the generated wastewater has low COD content due to low drying temperature and can be discharged into a sewage treatment facility or be brought into a sewage pipe network.

Compared with a common paddle/disc drying device, the low-temperature drying device 2 adopted by the system utilizes the waste heat of low-grade flue gas as a drying heat source, adopts hot water as a drying medium, and adopts steam as a heat source compared with a paddle/disc drying machine, so that the system has the advantages of higher energy utilization rate, lower heat loss, low medium temperature, and better safety and environmental friendliness.

The low-temperature drying device 2 adopted by the system is waste heat type low-temperature drying, and the low-temperature waste heat drying is different from the traditional hot air drying in the air circulation mode and the air dehumidification mode of a drying chamber. When the low-temperature waste heat is dried, the air is in closed circulation between the drying chamber and the waste heat drying machine (no waste heat is discharged). The traditional hot air drying is an open system (discharging waste heat) which heats air by using a heat source and directly discharges the air after moisture absorption, and the energy utilization rate is low (20-50%). The low-temperature waste heat drying heat source is hot water at 85-90 ℃ after being heated by a hot water-smoke heat exchanger. The method comprises the steps that dry air is heated to 65-80 ℃ by hot water at the temperature of 85-90 ℃, the heated dry air enters a mesh belt type conveyor, water in sludge distributed on a mesh belt is taken out to form wet air, the wet air is condensed by a cooler to carry the water and is discharged outside the mesh belt type conveyor to form dry air, the dry air is heated by the hot water in a heater to form hot dry air, and the hot dry air returns to the mesh belt type conveyor to circulate in the manner.

The temperature of the flue gas at the outlet of the flue gas purification device 8 is about 150 ℃, and the temperature of the flue gas discharged into the chimney after heat exchange by the hot water-flue gas heat exchanger 4 is 110-115 ℃.

The implementation steps of the system for co-processing low-temperature dried sludge by waste incineration are as follows:

in the existing (dotted line frame in fig. 1) or newly-built waste incineration power plant, domestic garbage enters an incinerator 6 through a waste feeding device 5, the domestic garbage is combusted in the incinerator 6, incineration flue gas recovers heat through a waste heat boiler 7 and generates power, flue gas at the outlet of the waste heat boiler is treated by a flue gas purification device 8, clean flue gas enters a hot water-flue gas heat exchanger 4 through a draught fan 9 to recover heat for sludge drying, and the flue gas after heat exchange is discharged into the atmosphere through a chimney 10. A bypass flue is additionally arranged between the induced draft fan 9 and the chimney 10, an adjusting valve is arranged on the flue, and when the sludge amount entering the sludge feeding device is less or the sludge moisture content is lower, the heat exchange air quantity is controlled by adjusting the valve on the bypass flue.

Meanwhile, the dewatered sludge with the water content of 60-80 percent is unloaded into a receiving bin through a sludge transport vehicle, then is sent into a sludge storage bin through a mechanical conveying device such as a sludge conveying pump or a screw conveyor and then is sent into the sludge low-temperature drying device 2 through sludge conveying equipment.

As shown in fig. 3, the low-temperature sludge drying device 2 comprises a feed hopper, a sludge slitter 21, a mesh belt conveyor 22, a cooler 23, a heater 24, a dry sludge outlet and the like, wherein the cooler 23 is communicated with the circulating cooling water device 3, and the heater 24 is communicated with the hot water-smoke heat exchanger 4.

The sludge is dried in the low-temperature drying device 2, and the specific process is as follows: the sludge is cut into strips by the slitter 21 and then enters the mesh belt conveyor 22, the sludge is uniformly distributed on the mesh belt conveyor 22, moisture in the sludge is taken out by hot dry air to form 60 ℃ wet air which enters the cooler 23, the moisture in the air is condensed under the action of cooling water in the cooler 23 and discharged out of the machine, the dry air after moisture discharge enters the heater 24, the dry air in the heater 24 is heated into 80 ℃ dry air by 90 ℃ hot water, and the hot dry air enters the mesh belt conveyor 22 again and circulates in the way. In the process, the sludge is dried due to the fact that moisture is brought out, and the sludge becomes dry sludge particles with the moisture content of 20-30%.

The dry sludge particles dried by the low-temperature drying device 2 are uniformly mixed with garbage in a certain proportion in a garbage feeding device 5 and then enter an incinerator 6 for incineration. The wastewater is discharged into a sewage treatment facility for treatment and then is discharged after reaching the standard.

The hot water required by the low-temperature sludge drying realizes the conversion of heat energy in the hot water-flue gas heat exchanger 4 by absorbing the waste heat of flue gas. The hot water-smoke heat exchanger 4 comprises an air inlet 4-1, an air outlet 4-2, a water inlet 4-3 and a water outlet 4-4, the air inlet 4-1 of the hot water-smoke heat exchanger 4 is connected with an outlet of an induced draft fan 9, the air outlet 4-2 is connected with a chimney 10, the water inlet 4-3 is connected with an outlet of a circulating water pump 11, the water outlet 4-4 is connected with a hot water inlet of the low-temperature drying device 2, and a hot water outlet of the low-temperature drying device 2 is connected with an inlet of the circulating water pump 11. The circulating water pump 11 is used for sending the low-temperature hot water utilized by the low-temperature drying device 2 back to the hot water-flue gas heat exchanger 4, and then the low-temperature hot water is changed into high-temperature hot water at 90 ℃ after heat exchange.

The temperature of an air inlet of the hot water-flue gas heat exchanger 4 is about 150 ℃, the temperature of an outlet is 110-115 ℃, the temperature of a water inlet is 65-70 ℃, and the temperature of a water outlet is 85-90 ℃. The water replenishing tank 12 is used for storing demineralized water and replenishing water to the hot water circulation water path through a water replenishing pump 13. The water outlet of the water replenishing tank 12 is connected with the inlet of the water replenishing pump 13, and the outlet of the water replenishing pump 13 is connected with the inlet pipeline of the circulating water pump 11. The water replenishing tank 12 and the water replenishing pump 13 are used for replenishing water to the system.

As a preferred embodiment, the hot water-flue gas heat exchanger 4 is a tube type heat exchanger, and the heat exchange tube is a 2205 fluorine plastic steel composite tube. The side plates, the end plates, the partition plates and the supporting pipes are made of 2205 duplex stainless steel materials.

As a preferred embodiment, the flow speed of the hot water-smoke heat exchanger 4 on the smoke side is 6-10 m/s.

As a preferred embodiment, the heat exchange tube bundle of the hot water-flue gas heat exchanger 4 is in a vertical row arrangement and is provided with a sound wave soot blower to prevent soot deposition.

As a preferred embodiment, the incinerator 6 adopts a circulating fluidized bed type, and the residual heat of the flue gas of two incineration lines is used for drying of a low-temperature drier and is mixed with garbage for combustion. The doping proportion of the dewatered sludge is 5-10%.

The utility model carries out waste heat recovery again on the clean flue gas which is treated by the flue gas purification device after being burnt, utilizes the generated hot water to carry out drying on the sludge in the low-temperature drying device, and then mixes the dried sludge and the household garbage for synergetic burning.

The utility model recycles the residual heat of the flue gas discharged into the atmosphere in the conventional incineration system, fully saves energy, uses the residual heat of the flue gas in the form of hot water for sludge drying by adopting the heat exchanger, reduces the drying temperature, reduces the generation of waste water, waste gas and odor, improves the energy utilization efficiency and saves the operation cost.

In the present invention, unless otherwise expressly stated or limited, the terms "connected" and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Claims (10)

1. The system for co-processing low-temperature dried sludge by waste incineration is characterized by comprising a sludge feeding device (1), a low-temperature drying device (2), a waste feeding device (5), an incinerator (6), a waste heat boiler (7), a flue gas purification device (8), an induced draft fan (9), a hot water-flue gas heat exchanger (4) and a chimney (10); the sludge feeding device (1) comprises a sludge input end and an output end, the output end of the sludge feeding device (1) is connected with the material inlet end of the low-temperature drying device (2), the material outlet end of the low-temperature drying device (2) is connected with the inlet of the garbage feeding device (5), the outlet end of the garbage feeding device (5) is connected with the material inlet of the incinerator (6), the smoke outlet end of the incinerator (6) is connected with the smoke inlet end of the waste heat boiler (7), the smoke outlet end of the waste heat boiler (7) is connected with the inlet end of the smoke purifying device (8), the outlet end of the smoke purifying device (8) is connected with the inlet of the draught fan (9), the outlet of the draught fan (9) is connected with the smoke inlet of the hot water-smoke heat exchanger (4), the smoke outlet of the hot water-smoke heat exchanger (4) is connected with the chimney (10), and the hot water-smoke heat exchanger (4) is communicated with the low-temperature drying device (2) in a bidirectional way.

2. The system for waste incineration cooperative disposal of low-temperature dried sludge according to claim 1, wherein the low-temperature drying device (2) is in bidirectional communication with the circulating cooling water device (3).

3. The system for waste incineration cooperative disposal of low-temperature dried sludge according to claim 2, wherein the low-temperature drying device (2) comprises a slitter (21), a mesh belt conveyor (22), a cooler (23) and a heater (24), the sludge enters the mesh belt conveyor (22) after being cut by the slitter (21), the mesh belt conveyor (22) is communicated with the cooler (23), the cooler (23) is communicated with the heater (24), and the heater (24) is communicated with the mesh belt conveyor (22); the cooler (23) is in bidirectional communication with the circulating cooling water device (3), and the heater (24) is in bidirectional communication with the hot water-smoke heat exchanger (4).

4. The system for waste incineration cooperative disposal of low-temperature dried sludge according to any one of claims 1 to 3, wherein the hot water-gas heat exchanger (4) comprises a gas inlet (4-1), a gas outlet (4-2), a water inlet (4-3) and a water outlet (4-4), the gas inlet (4-1) of the hot water-gas heat exchanger (4) is connected with an outlet of an induced draft fan (9), the gas outlet (4-2) is connected with a chimney (10), the water inlet (4-3) is connected with an outlet of a circulating water pump (11), the water outlet (4-4) is connected with a hot water inlet of the low-temperature drying device (2), and a hot water outlet of the low-temperature drying device (2) is connected with an inlet of the circulating water pump (11).

5. The system for the waste incineration cooperative disposal of the low-temperature dried sludge according to claim 4, wherein an inlet pipeline of the circulating water pump (11) is connected with an outlet of the water replenishing pump (13), and an inlet of the water replenishing pump (13) is connected with the water replenishing tank (12).

6. The system for the waste incineration cooperative disposal of the low-temperature dried sludge as claimed in claim 1, wherein a bypass flue is further arranged from the induced draft fan (9) to the chimney (10), and a regulating valve is arranged on the flue.

7. The system for the waste incineration cooperative disposal of the low-temperature dried sludge according to claim 1 or 3, wherein the hot water-flue gas heat exchanger (4) adopts a tube type heat exchanger, and the heat exchange tube adopts 2205 fluorine plastic steel composite tubes.

8. The system for the waste incineration cooperative disposal of the low-temperature dried sludge as claimed in claim 1 or 3, wherein the flow velocity of the hot water-gas heat exchanger (4) on the gas side is 6-10 m/s.

9. The system for the cooperative incineration disposal of the low-temperature dried sludge according to the claim 1 or 3, wherein the heat exchange tube bundle of the hot water-smoke heat exchanger (4) is arranged in a vertical row and is provided with a sound wave soot blower.

10. The system for waste incineration co-disposal of low temperature dried sludge as claimed in claim 1, wherein the incinerator (6) is of the circulating fluidized bed or grate furnace type.

Images