CN219526467U

CN219526467U - Integrated sludge drier

Info

Publication number: CN219526467U
Application number: CN202320171517.1U
Authority: CN
Inventors: 蒋涛; 张辉; 吴可; 范信生
Original assignee: Cecep Guozhen Environmental Protection Technology Co ltd
Current assignee: Cecep Guozhen Environmental Protection Technology Co ltd
Priority date: 2023-01-17
Filing date: 2023-01-17
Publication date: 2023-08-15
Anticipated expiration: 2033-01-17

Abstract

The utility model discloses an integrated sludge dryer which comprises a thin-layer sludge dryer, wherein a heat-conducting interlayer is arranged in the thin-layer sludge dryer and is connected with a hot oil circulation system, and the hot oil circulation system is connected with a sewage source heat pump system; the utility model utilizes the sewage source heat pump to introduce low-grade heat energy sewage into the system at low temperature in winter, gradually increases the temperature of heat conduction oil circulation through physical means such as evaporation, compression, condensation heat exchange and the like, finally pumps the hot oil into the heat conduction interlayer of the thin layer drier, provides heating energy for sludge drying and reduces energy consumption.

Description

Integrated sludge drier

Technical Field

The utility model relates to the technical field of sludge treatment equipment, in particular to an integrated sludge dryer.

Background

Along with the increment of sewage treatment scale in recent years, the corresponding sludge treatment scale is also increasing day by day, how to effectively carry out reasonable treatment and disposal on the sludge, and the reduction, harmlessness and recycling of the treatment process are realized in the current technical key development direction. The drying of the sludge can effectively reduce the volume and provide a precondition for the subsequent recycling.

At present, a sludge heat drying technology is mainly adopted and mainly comprises high-temperature drying, medium-temperature drying and low-temperature drying, the principle of the sludge heat drying technology is to exert drying potential by reducing air humidity, and high-temperature drying is realized by high-temperature hot air or steam in most cases, however, a large amount of energy is consumed in the sludge drying process in the prior art, and the sealing requirements of the high-temperature hot air or the high-temperature steam are higher.

Disclosure of Invention

The utility model aims to provide an integrated sludge dryer to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the integrated sludge drier comprises a thin-layer sludge drier, wherein a sludge feed inlet and a sludge discharge outlet are formed in the thin-layer sludge drier, and the integrated sludge drier is characterized in that a cyclone condensing device is connected to the tail end of the thin-layer sludge drier, the bottom of the cyclone condensing device is connected with a sewage tank through a pipeline, a heat conduction interlayer is arranged in the thin-layer sludge drier, the heat conduction interlayer is connected with a hot oil circulation system, and the hot oil circulation system is connected with a sewage source heat pump system;

the hot oil circulation system comprises a hot oil circulation pipeline communicated with the heat conduction interlayer, a heat exchanger is arranged in the sewage source heat pump system, the hot oil circulation pipeline penetrates through the heat exchanger, an evaporator, a compressor and a condenser which are sequentially connected are arranged in the sewage source heat pump system, the sewage tank is connected with a first hot water circulation pipeline, the first hot water circulation pipeline is sequentially connected with a shell of the evaporator, the compressor and the condenser, the heat exchanger is connected with a second hot water circulation pipeline, and the first hot water circulation pipeline is in heat exchange connection with the second hot water circulation pipeline through partial contact.

As a further scheme of the utility model: the evaporator, the compressor and the condenser are sequentially communicated through a cooling liquid pipe, an expansion valve is arranged between the evaporator and the condenser, and refrigerant circularly flows in the cooling liquid pipe.

As a further scheme of the utility model: the thin-layer sludge drying machine is connected with a driving motor through a bracket, a drying chamber is arranged in the thin-layer sludge drying machine, a rotor is arranged in the drying chamber, one end of the rotor is in power connection with the driving motor through a shaft connector, a mud scraping plate is arranged in the thin-layer sludge drying machine, and the mud scraping plate is connected to the rotor.

As a further scheme of the utility model: and the heat conducting interlayer is provided with a hot oil inlet and a hot oil outlet, and the hot oil inlet and the hot oil outlet are connected with a hot oil circulation pipeline.

As a further scheme of the utility model: and the hot oil circulating pipeline is provided with a hot oil lifting pump and a hot oil heater.

As a further scheme of the utility model: the tail end of the thin-layer sludge drying machine is connected with a smoke pump, the rear end of the smoke pump is connected with a cyclone condensing device, a sewage pump is arranged at the bottom of the cyclone condensing device, a condensed water discharge port is formed in the bottom of the cyclone condensing device, and the condensed water discharge port is communicated with a sewage tank through a pipeline.

As a further scheme of the utility model: and an intermediate water pump is arranged on the second hot water circulating pipeline.

As a further scheme of the utility model: the compressor, the condenser, the evaporator and the heat exchanger are connected with a controller through wires.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model utilizes the sewage source heat pump to introduce low-grade heat energy sewage into the system at low temperature in winter, gradually increases the temperature of heat conduction oil circulation by physical means such as evaporation, compression, condensation, heat exchange and the like, finally pumps the heat oil into the heat conduction interlayer of the thin layer drier, provides heating energy for sludge drying, and reduces energy consumption;

2. according to the utility model, the heat conduction oil is used as a heat conduction medium of the thin-layer dryer, so that the problems of' running off, dripping and the like of steam heating can be completely eradicated from the source, and compared with steam, the density of the heat oil is higher, so that the indirect heat conduction effect can be better realized;

3. the steam produced by the sludge heat drying is subjected to cyclone adsorption and condensation, and condensed water is returned to the sewage tank body, so that the recycling of the sludge drying hot flue gas is realized.

Drawings

FIG. 1 is a schematic diagram of the structure of the present embodiment;

in the figure: the device comprises a 1-shaft connector, a 2-driving motor, a 3-bracket, a 4-sludge feed inlet, a 5-hot oil inlet, a 6-thin layer sludge drier, a 7-heat conducting interlayer, an 8-scraping plate, a 9-rotor, a 10-sludge discharge outlet, an 11-hot oil outlet, a 12-smoke pump, a 13-cyclone condensing device, a 14-blow-down pump, a 15-hot oil lifting pump, a 16-hot oil heater, a 17-intermediate water pump, a 18-heat exchanger, a 19-controller, a 20-evaporator, a 21-compressor, a 22-condensing machine, a 23-sewage tank, a 24-wire, a 25-condensed water discharge outlet, a 26-drying chamber, a 27-sewage heat pump system, a 28-expansion valve and a 29-cooling liquid pipe.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1, in the embodiment of the utility model, an integrated sludge dryer comprises a thin-layer sludge dryer 6, wherein a sludge feed port 4 and a sludge discharge port 10 are arranged on the thin-layer sludge dryer 6, a driving motor 2 is connected to the thin-layer sludge dryer 6 through a bracket 3, a drying chamber 26 is arranged in the thin-layer sludge dryer 6, a rotor 9 is arranged in the drying chamber 26, one end of the rotor 9 is in power connection with the driving motor 2 through a shaft connector 1, a mud scraper 8 is arranged in the thin-layer sludge dryer 6, the mud scraper 8 is connected to the rotor 9, a cyclone condensing device 13 is connected to the tail end of the thin-layer sludge dryer 6, a sewage tank 23 is connected to the bottom of the cyclone condensing device 13 through a pipeline, a flue gas pump 12 is connected to the tail end of the thin-layer sludge dryer 6, a sewage pump 14 is arranged at the bottom of the cyclone condensing device 13, a condensate water discharge port 25 is arranged at the bottom of the cyclone condensing device 13, and the condensate water discharge port 25 is communicated with the sewage tank 23 through the pipeline.

The thin sludge drier 6 is internally provided with a heat conduction interlayer 7, the heat conduction interlayer 7 is connected with a hot oil circulation system, the hot oil circulation system comprises a hot oil circulation pipeline communicated with the heat conduction interlayer 7, the heat conduction interlayer 7 is provided with a hot oil inlet 5 and a hot oil outlet 11, the hot oil inlet 5 and the hot oil outlet 11 are connected with the hot oil circulation pipeline, the hot oil circulation pipeline is provided with a hot oil lifting pump 15 and a hot oil heater 16, the circulating oil in the hot oil circulation pipeline is supplemented with drying heat energy through the hot oil heater 16, the application range of the whole system and the sludge drying efficiency are improved,

the hot oil circulation system is connected with a sewage source heat pump system 27, a heat exchanger 18 is arranged in the sewage source heat pump system 27, a hot oil circulation pipeline penetrates through the heat exchanger 18, an evaporator 20, a compressor 21, a condenser 22 and an expansion valve 28 which are sequentially connected are arranged in the sewage source heat pump system 27, the expansion valve 28 is positioned between the evaporator 20 and the condenser 22, liquid refrigerants circularly flow in the compressor 21, the condenser 22, the evaporator 20 and the expansion valve 28 to form a compression circulation heating system, a sewage tank 23 is connected with a first hot water circulation pipeline, the first hot water circulation pipeline is sequentially connected with shells of the evaporator 20, the compressor 21 and the condenser 22, the heat exchanger 18 is connected with a second hot water circulation pipeline, the first hot water circulation pipeline is in local contact with the second hot water circulation pipeline for heat exchange connection, an intermediate water pump 17 is arranged on the second hot water circulation pipeline, and the compressor 21, the condenser 22, the evaporator 20 and the heat exchanger 18 are connected with a controller 19 through wires 24.

When in use, the utility model comprises the following steps:

the first step: a first hot water cycle is formed between the sewage tank 23, the evaporator 20, the compressor 21, the condenser 22 and the pipes connected to them, and a set of compression cycle heating systems is formed between the evaporator 20, the compressor 21, the condenser 22 and the expansion valve 28 through the coolant pipe 29, the medium in the compression heating systems is liquid refrigerant, the liquid refrigerant is first compressed into high-temperature high-pressure refrigerant gas by the compressor 21 and enters the condenser 22, in the process, the refrigerant emits heat into the first hot water cycle to cool itself into high-pressure liquid, and the temperature of hot water in the pipes is raised. The refrigerant is then expanded to a low temperature and low pressure liquid through the expansion valve 28, and then enters the evaporator 20 to absorb heat from the low temperature water source, evaporate into low pressure steam, and reduce the water temperature of the low temperature heat source water. Finally, the low-pressure refrigerant steam enters the compressor 21 again to be compressed into high-temperature high-pressure gas, so that heated hot water can be obtained at the outlet of the condenser 22, and the water temperature in the whole closed-circuit water circulation is finally increased after the circulation is performed for a plurality of times.

And a second step of: a second hot water circulation system is formed among the heat exchanger 18, the evaporator 20, the compressor 21 and the pipelines connected with the heat exchanger, circulating heat conducting medium of the circulation system is middle circulating water, the second hot water circulation pipeline is in partial contact with the first hot water circulation pipeline and carries out heat exchange, so that circulating water in the second hot water circulation pipeline is heated, hot water in the second hot water circulation pipeline is introduced into the heat exchanger 18, meanwhile, a separation chamber is additionally arranged in the heat exchanger 18, the middle circulating water after heating is introduced into a right half chamber, heat conducting oil of the left half chamber is prepared for heat exchange, and the actual temperature of heat conducting interlayer hot oil is increased through multiple times of circulation.

And a third step of: a hot oil circulation system is formed among a heat exchanger 18, a hot oil heater 16, a hot oil lifting pump 15, a hot oil inlet 5 at the upper part of a heat conducting interlayer 7 and a hot oil outlet 11 at the lower part, circulating heat conducting medium of the circulation system is heat conducting oil, after heat exchange is carried out between the heat exchanger 18 and intermediate water in a second group of circulation, heat obtained in the first two steps is introduced into the hot oil circulation system, a hot oil heater 16 is further arranged in a hot oil circulation pipeline, and the purpose of supplementing drying heat is to improve the application range and sludge drying efficiency of the whole system, the heat conducting oil is pumped into the heat conducting interlayer 7 of a thin-layer sludge drying machine 6 through the power lifting effect of the hot oil lifting pump 15, the hot oil of the whole interlayer flows continuously in the heat conducting interlayer in a full pipe state, and the heat exchange contact area with a sludge drying cavity is increased to the greatest extent, and therefore the whole heat drying efficiency is improved. Finally, through the three steps and the control and regulation functions of the controller 19, the low-grade heat energy in the sewage tank is converted into high-grade heat energy required by the thin-layer sludge drying machine.

The sludge drying part mainly comprises a drying chamber 26, a rotor 9, a mud scraping plate 8, a shaft connector 1 and a driving motor 2, sludge to be dried is sent into the drying chamber 26 through a sludge feeding port 4, the rotor connected with the shaft connector is rotationally distributed on the surface of a hot wall, the mud scraping plate on the rotor repeatedly turns and mixes the sludge on the inner wall surface of the drying chamber and is forwards conveyed to a sludge outlet, in the process, moisture in wet sludge is continuously evaporated, finally dried sludge is discharged out of the thin-layer sludge drying machine through a sludge discharging port 10 and can be further treated and recycled, meanwhile, a cyclone condensing device 13 is arranged at the rear end of the thin-layer sludge drying machine, hot flue gas generated in the drying process enters from the side of the cyclone condensing device 13, the flue gas is gradually cooled by condensed water in the cyclone condensing device 13 in the downward excessive process, the final hot flue gas is gradually liquefied into liquid and solid impurities, the condensed liquid is guided into a sewage tank 23 through a condensed water discharging port 25, and the solid impurities are discharged out of a sewage pump 14 from the bottom of the cyclone condensing device 13.

Example 1

The water content of the sludge to be treated is 60%, and after the integrated sludge is dried, the water content of the sludge can be reduced to about 20%.

Firstly, a water source heat pump system, a hot oil lifting pump and a hot oil heater should be started, and proper preheating is needed for the thin-layer sludge drier. The sewage (water temperature 20 c) in the sewage tank 23 is extracted and introduced into the evaporator 20, and gradually flows through the compressor 21, the condenser 22, and finally flows back into the sewage tank 23, while at the same time, a refrigerant cycle is started, the liquid refrigerant is first compressed into a high-temperature high-pressure refrigerant gas by the compressor 21 and enters the condenser 22, in which process the refrigerant gives off heat into the first hot water cycle to cool itself into a high-pressure liquid, and the hot water temperature in the pipe is raised by 8 c. The refrigerant is then expanded to a low temperature and low pressure liquid through the expansion valve 28, and then enters the evaporator 20 to absorb heat from the low temperature water source, evaporate to low pressure steam, and reduce the temperature of the low temperature water temperature source by 3 ℃. Finally, low-pressure refrigerant steam enters the compressor 21 again to be compressed into high-temperature high-pressure gas, heated hot water can be obtained at the outlet of the condenser 22, the temperature of the whole circulating water can be increased by 5 ℃ through one-time circulation, the temperature increment can be realized after multiple circulation, and the temperature is finally controlled to be 55-60 ℃.

Then, the intermediate water pump 17 is started to introduce the heat in the first circulating water system into the second circulating water system, the intermediate water in the second circulating water system is introduced into the right half chamber of the heat exchanger, the heat conduction oil in the third circulating system circulates in the system for a plurality of times, the heat conduction oil enters the left half chamber of the heat exchanger to exchange heat with the intermediate water in the warmed right half chamber, the temperature of the heat conduction oil is increased, because of the difference of specific heat capacities of the oil and the water, the oil temperature can be increased to 75-80 ℃, the heat conduction oil is pumped into the heat conduction interlayer of the thin sludge drier by the heat conduction oil lifting pump, and the heat conduction oil of the heat conduction interlayer is returned to the heat exchanger through the heat oil outlet to form a heat oil circulating system, and for wet sludge with the water content of 60% in this example, the heat oil heater is further required to be started to increase the temperature of the heat conduction oil, and the temperature is required to be adjusted to 130-150 ℃ according to the actual heat calculation of the sludge.

Finally, pumping sludge to be treated into a sludge feed inlet, starting a shaft connector and a driving motor at the same time, driving a rotor to continuously rotate in a sludge chamber, continuously pushing sludge into the rear end of a thin-layer sludge drier while repeatedly stirring and mixing the sludge on the inner wall surface of a drying chamber by a mud scraping plate on the rotor, forming a layer of thin sheet on the inner wall of the drying chamber in the secondary process, continuously conducting heat with heat oil of a heat conducting interlayer, finally discharging the dried sludge through a sludge discharge port, absorbing hot flue gas in the drying process by a cyclone condenser at the rear end, and supplementing the heat into a sewage tank after condensation, wherein insoluble impurity solids in the hot flue gas are discharged through a sewage pump at the bottom of the cyclone condenser.

The water content of the dried sludge is about 15% -23% through the water content test, the system has operability, the use times of the hot oil heater are effectively reduced through adopting the sewage source heat pump, and the energy consumption of the system can be saved by more than 40% through measuring and calculating, so that the system is an energy-saving and friendly sludge drying system device.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The integrated sludge drying machine comprises a thin-layer sludge drying machine (6), wherein a sludge feed inlet (4) and a sludge discharge outlet (10) are formed in the thin-layer sludge drying machine (6), and the integrated sludge drying machine is characterized in that a cyclone condensing device (13) is connected to the tail end of the thin-layer sludge drying machine (6), a sewage tank (23) is connected to the bottom of the cyclone condensing device (13) through a pipeline, a heat conduction interlayer (7) is arranged in the thin-layer sludge drying machine (6), the heat conduction interlayer (7) is connected with a hot oil circulation system, and the hot oil circulation system is connected with a sewage source heat pump system (27);

the hot oil circulation system comprises a hot oil circulation pipeline communicated with the heat conduction interlayer (7), a heat exchanger (18) is arranged in the sewage source heat pump system (27), the hot oil circulation pipeline penetrates through the heat exchanger (18), an evaporator (20), a compressor (21) and a condenser (22) which are sequentially connected are arranged in the sewage source heat pump system (27), a sewage tank (23) is connected with a first hot water circulation pipeline, the first hot water circulation pipeline is sequentially connected with a shell of the evaporator (20), the compressor (21) and the condenser (22), the heat exchanger (18) is connected with a second hot water circulation pipeline, and the first hot water circulation pipeline is in heat exchange connection with the local contact of the second hot water circulation pipeline.

2. An integrated sludge drier according to claim 1, wherein the evaporator (20), the compressor (21) and the condenser (22) are sequentially communicated through a coolant pipe (29), an expansion valve (28) is arranged between the evaporator (20) and the condenser (22), and a refrigerant circularly flows in the coolant pipe (29).

3. The integrated sludge drying machine according to claim 1, characterized in that the thin-layer sludge drying machine (6) is connected with a driving motor (2) through a bracket (3), a drying chamber (26) is arranged in the thin-layer sludge drying machine (6), a rotor (9) is arranged in the drying chamber (26), one end of the rotor (9) is in power connection with the driving motor (2) through a shaft connector (1), a mud scraping plate (8) is arranged in the thin-layer sludge drying machine (6), and the mud scraping plate (8) is connected to the rotor (9).

4. An integrated sludge drier according to claim 1, characterised in that the heat conducting interlayer (7) is provided with a hot oil inlet (5) and a hot oil outlet (11), and the hot oil inlet (5) and the hot oil outlet (11) are connected with a hot oil circulation pipeline.

5. An integrated sludge drier according to claim 1, characterised in that the hot oil circulation pipe is provided with a hot oil lift pump (15) and a hot oil heater (16).

6. An integrated sludge drying machine according to claim 1, characterized in that the tail end of the thin-layer sludge drying machine (6) is connected with a flue gas pump (12), the rear end of the flue gas pump (12) is connected with a cyclone condensing device (13), a sewage pump (14) is arranged at the bottom of the cyclone condensing device (13), a condensed water discharge port (25) is formed at the bottom of the cyclone condensing device (13), and the condensed water discharge port (25) is communicated with a sewage tank (23) through a pipeline.

7. An integrated sludge drier according to claim 1, characterised in that the second hot water circulation pipe is provided with an intermediate water pump (17).

8. An integrated sludge drier according to claim 1, characterised in that the compressor (21), condenser (22), evaporator (20), heat exchanger (18) are connected to a controller (19) by means of wires (24).