CN211620325U

CN211620325U - Sludge pyrolysis waste heat recovery device

Info

Publication number: CN211620325U
Application number: CN201921917298.7U
Authority: CN
Inventors: 康勇
Original assignee: Chengdu Energy Engineering Co ltd
Current assignee: Chengdu Energy Engineering Co ltd
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2020-10-02
Anticipated expiration: 2029-11-08

Abstract

The utility model discloses a sludge pyrolysis waste heat recovery device, which comprises a sludge conveying system, a hot air recovery system, a high temperature flue gas recovery system and a control system; the sludge collecting and conveying system comprises a sludge feeding screw conveyor and a first material hopper; the hot air recycling system comprises a sludge low-temperature processor, a first material propeller, a first gas heating tank, a hot air collecting buffer tank, a hot air blower and a valve; high temperature flue gas recovery system includes screw conveyer, second object hopper, second object propeller, the gaseous heating tank of second, the second air heater, organic matter combustor, organic matter steam buffer tank, high temperature flue gas filter, and hot-blast collection buffer tank is connected, ejection of compact screw conveyer, the utility model discloses the flue gas of realizing and the waste heat recovery of tail gas, very big reduction the tail gas emission volume of pyrolysis carbonization in-process, and the exhaust gas pollutant concentration of emission reduces in the volume, can reach the exhaust emission standard.

Description

Sludge pyrolysis waste heat recovery device

Technical Field

The utility model relates to a sludge pyrolysis waste heat recovery device, which is particularly suitable for an energy-saving device for pyrolysis and carbonization treatment of municipal sewage sludge and industrial oily sludge.

Background

In the municipal sewage treatment and industrial sewage treatment processes, a large amount of sludge is generated, the sludge is dried, incinerated, buried and the like, the sludge is only heated, and heat generated in the pyrolysis process is directly discharged into the surrounding environment, so that the environment is polluted. The sludge pyrolysis carbonization technology can effectively treat the sludge and can also prepare the sludge into the activated carbon with high added value, thereby really realizing the resource utilization of the waste. However, in the pyrolysis carbonization treatment, the energy consumption and the operation cost are high, which is a bottleneck restricting the application, so that the necessary measures of realizing the reuse of energy and reducing the cost of sludge drying are realized.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned weak point that exists among the prior art, the utility model aims to provide a mud pyrolysis waste heat recovery device to fundamentally solves the high problem of energy resource consumption who exists in the pyrolysis treatment technology, provides good operation guarantee for mud resourceful treatment.

The utility model discloses a following technical scheme realizes: a sludge pyrolysis waste heat recovery device comprises a sludge conveying system, a hot air recovery system, a high-temperature flue gas recovery system and a control system;

the sludge conveying system comprises a sludge feeding screw conveyor for conveying sludge, and the discharge end of the sludge feeding screw conveyor is connected with a first material hopper;

the hot air recycling and recycling system comprises a first material propeller arranged below a discharge port of a first material hopper, the output end of the first material propeller is connected with the sludge low-temperature processor through a pipeline, the input end of the first material propeller is connected with a first gas heating tank through a pipeline, the input end of the first gas heating tank is connected with a first air heater through a pipeline, the output end of the first material propeller is respectively connected with a hot air collecting and buffering tank through a steam pipe and a hot air pipe, and a one-way valve and a booster fan are arranged on the steam pipe;

high temperature flue gas recovery system is including setting up the screw conveyer in first material propeller discharge end below, the screw conveyer discharge end is equipped with and is connected with the second object hopper, second object hopper below is equipped with second object material propeller, second object material propeller input has the second gas heating jar through the pipe connection, the input of second gas heating jar has the second air heater through the pipe connection, second gas heating jar input has organic matter combustor through the pipe connection, the input of organic matter combustor has organic matter steam buffer tank through the pipe connection, the input of organic matter steam buffer tank has high temperature flue gas filter through the pipe connection, high temperature flue gas filter input is connected with the second object material propeller through the steam pipe, second object material propeller output still collects the buffer tank with hot-blast being connected, second object material propeller discharge gate still is connected with ejection of compact screw conveyer.

And a first regulating valve is arranged on a pipeline between the first air heater and the first gas heating tank.

And a second regulating valve is arranged on a pipeline between the second air heater and the second gas heating tank.

And a third regulating valve is arranged on a pipeline between the organic matter steam buffer tank and the organic matter burner.

Furthermore, the utility model discloses

Compared with the prior art, the utility model, following advantage and beneficial effect have:

1. through the application of the waste heat recovery device, the energy-saving rate of the pyrolysis carbonization process is more than or equal to 30 percent, the energy is effectively saved, and the operating cost of sludge treatment is reduced.

2. The recovery utilization rate of the system waste heat is more than or equal to 80 percent.

3. Due to the realization of the waste heat recovery of the flue gas and the tail gas, the tail gas emission in the pyrolysis carbonization process is greatly reduced, and the concentration of the discharged waste gas pollutants is reduced, so that the tail gas emission standard can reach the secondary control standard of the air pollutant comprehensive emission standard (GB 16297-1996).

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic structural view of the present invention;

wherein: 1-sludge feeding screw conveyer, 2-first material hopper, 3-first material propeller, 4-sludge low-temperature processor, 5-first gas heating tank, 6-first air heater, 7-first regulating valve, 8-hot air collecting buffer tank, 9-one-way valve, 10-booster fan, 11-screw conveyer, 12-second material hopper, 13-second material propeller, 14-second gas heating tank, 15-second air heater, 16-second regulating valve, 17-organic matter combustor, 18-organic matter steam buffer tank, 19-third regulating valve, 20-high-temperature flue gas filter, 21-discharging screw conveyer.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The sludge pyrolysis waste heat recovery device of the embodiment, as shown in fig. 1, includes a sludge conveying system, a hot air recycling system, a high temperature flue gas recycling system and a control system; the sludge conveying system comprises a sludge feeding screw conveyor 1 for conveying sludge, and the discharge end of the sludge feeding screw conveyor 1 is connected with a first material hopper 2.

The hot air recycling system comprises a first material propeller 3 arranged below a discharge port of a first material hopper 2, the output end of the first material propeller 3 is connected with a sludge low-temperature processor 4 through a pipeline, the input end of the first material propeller 3 is connected with a first gas heating tank 5 through a pipeline, the input end of the first gas heating tank 5 is connected with a first air heater 6 through a pipeline, a first adjusting valve 7 is installed on a pipeline between the first air heater 6 and the first gas heating tank 5, the output end of the first material propeller 3 is respectively connected with a hot air collecting buffer tank 8 through a steam pipe, and a check valve 9 and a booster fan 10 are installed on the steam pipe.

The high-temperature flue gas recovery system comprises a screw conveyer 11 arranged below the discharge end of a first material propeller 3, the discharge end of the screw conveyer 11 is connected with a second material hopper 12, a second material propeller 13 is arranged below the second material hopper 12, the input end of the second material propeller 13 is connected with a second gas heating tank 14 through a pipeline, the input end of the second gas heating tank 14 is connected with a second hot air blower 15 through a pipeline, a second regulating valve 16 is arranged on the pipeline between the second hot air blower 15 and the second gas heating tank 14, the input end of the second gas heating tank 14 is connected with an organic matter burner 17 through a pipeline, the input end of the organic matter burner 17 is connected with an organic matter steam buffer tank 18 through a pipeline, a third regulating valve 19 is arranged on the pipeline between the organic matter steam buffer tank 18 and the organic matter burner 17, and the input end of the organic matter steam buffer tank 18 is, the input end of the high-temperature flue gas filter 20 is connected with a second material propeller 13 through a steam pipe, the output end of the second material propeller 13 is also connected with a hot air collecting buffer tank 8, and the discharge hole of the second material propeller 13 is also connected with a discharge screw conveyor 21.

The utility model discloses the theory of operation explains as follows:

1. sludge conveying:

1) sludge from a sewage treatment plant after pre-dehydration is conveyed to a first material propeller (a low-temperature dryer) through a feeding screw conveyer for treatment;

2) the sludge after low-temperature drying treatment enters a first material propeller (pyrolysis carbonization machine) through a screw conveyer for treatment;

3) and (4) recycling the carbide treated by the pyrolysis carbonization machine.

2. Hot-blast recovery system that adds:

1) an external heat supply source heats the gas in the first gas heating tank (150-

2) The hot air entering the heater jacket enters a hot air collecting buffer tank after the hot air circulation in the low-temperature heater is completed.

3) In the pyrolysis carbonization process, hot air entering a jacket of the pyrolysis heater enters a hot air collecting buffer tank after thermal circulation is completed.

4) The hot air entering the hot air collecting buffer tank enters a heater jacket of the low-temperature dryer through the self-blowing fan to heat the sludge in the heater, so that the recycling of the hot air is realized.

5) Under the heating of the recovered waste heat, the supply amount of the external heat source can be adjusted according to the temperature parameter on the heater under the drying condition of the sludge in the low-temperature heater, and even the external heat source can be closed, so that the energy conservation is realized.

6) The main function of the collecting buffer tank is to reduce the impact on the system pipeline in the hot air recovery process, balance and adjust the heat source.

7) The function of the one-way valve on the recovery pipeline is to stop the hot air of the heater jacket from flowing back from the recovery pipeline.

High-temperature flue gas recovery system

1) After the external heat supply source heats the gas in the second gas heating tank (500-.

2) And the hot air entering the jacket of the pyrolysis heater enters a hot air collecting buffer tank after thermal circulation is completed.

3) The oil vapor (or organic steam) generated in the pyrolysis carbonization process enters a high-temperature flue gas filter, a filter element of the high-temperature flue gas filter can bear the impact of the temperature of 800 ℃, meanwhile, the smoke dust is filtered with high precision, and the filtered oil vapor (or organic steam) is introduced, so that the smoke dust has low heat loss and extremely low dust content, and can directly enter an oil (organic) vapor collection buffer tank in a vapor state.

4) After the steam buffer tank is collected to balance and adjust a heat source, the steam buffer tank enters a special burner to heat a heat medium (air or inert gas), and the heated medium enters a heater jacket to pyrolyze and carbonize sludge.

5) Under the heating of the recovered waste heat, the supply amount of the external heat source can be adjusted according to the drying condition and the temperature parameter of the sludge in the pyrolysis carbonization machine, and even the external heat source can be closed, thereby realizing energy conservation.

4. The control system comprises: the valve in the waste heat recovery process is adjusted to be intelligently controlled by adopting a Programmable Logic Controller (PLC) programmable control mode according to the temperature parameters, and the labor intensity of workers is reduced.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides a mud pyrolysis waste heat recovery device which characterized in that: comprises a sludge conveying system, a hot air recycling system, a high-temperature flue gas recycling system and a control system;

2. The sludge pyrolysis waste heat recovery device according to claim 1, characterized in that: and a first regulating valve is arranged on a pipeline between the first air heater and the first gas heating tank.

3. The sludge pyrolysis waste heat recovery device according to claim 1, characterized in that: and a second regulating valve is arranged on a pipeline between the second air heater and the second gas heating tank.

4. The sludge pyrolysis waste heat recovery device according to claim 1, characterized in that: and a third regulating valve is arranged on a pipeline between the organic matter steam buffer tank and the organic matter burner.