Sludge drying system utilizing waste gas

Abstract

The utility model discloses a sludge drying system utilizing waste gas, which comprises a sludge bin (1), the sludge bin (1) is connected with a mixing machine (2) through a pipeline, a cement raw material bin (3) for supplying cement is arranged above the mixing machine (2), the mixing machine (2) is connected with a flowing layer drying machine (4) through a pipeline, the flowing layer drying machine (4) is connected with a bucket elevator (5), and the bucket elevator (5) is connected with the sludge bin (1). The bucket elevator (5) is connected with a dried cement bin (6), and the dried cement bin (6) is connected with a decomposing furnace (7); wet sludge and cement raw material powder are mixed (used for increasing the fluidity of the sludge) to the mixing machine (2), transportation is convenient, meanwhile, low-temperature waste gas of the AQC is fed into the flowing layer drying machine (4) through a permanent induced draft fan to dry the sludge, boiler steam does not need to be used for drying the sludge, the generating capacity is improved, meanwhile, waste gas can be recycled, and the waste utilization rate is effectively increased.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sludge treatment technical field, specifically, the utility model relates to a kind of sludge drying system using waste gas. BACKGROUND

[0002] The key link in sewage treatment is the treatment of sludge, which contains a large amount of organic nutrients, heavy metals and bacteria, etc., and cannot be directly discharged. Multiple treatments are required for the sludge. The sludge is usually dried and then treated by landfill incineration or other methods to make it harmless.

[0003] A system for co-processing sludge by grate furnace and waste incineration is disclosed in a public specification with patent application number 201720563046.3 and publication date December 29, 2017. It belongs to the field of sludge treatment and includes a grate furnace, a waste heat boiler, and a steam turbine connected in sequence. It also includes a sludge dryer with a wet sludge inlet, a dried sludge outlet, a waste gas discharge port, a steam inlet, and a steam outlet. The wet sludge inlet is used to introduce wet sludge. The dried sludge outlet is connected to the grate furnace waste inlet. The waste gas discharge port is connected to the grate furnace air inlet pipe through a water washing device. The steam inlet is connected to the steam extraction port of the steam turbine. The steam outlet is connected to the feedwater inlet of the waste heat boiler through a condenser. This utility model utilizes existing and mature grate furnace and waste incineration technology to effectively dry and co-incinerate sludge, significantly reducing the construction and operation costs of sludge drying and incineration projects, and achieving harmless, reduction, and resource utilization of sludge treatment.

[0004] In the existing technology, the market currently uses boiler steam to dry sludge, which wastes steam and reduces the power generation capacity of the boiler unit. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a sludge drying system using waste gas that can effectively utilize low-temperature waste gas.

[0006] To achieve the above purpose, the utility model adopts the technical scheme of a sludge drying system using waste gas, which includes a sludge bin connected to a mixer through a pipeline. The mixer is provided with a cement raw material bin above it to supply cement. The mixer is connected to a flowing layer dryer through a pipeline. The flowing layer dryer is connected to a bucket elevator. The bucket elevator is connected to a dried cement bin. The dried cement bin is connected to a decomposition furnace.

[0007] The flowing layer dryer is connected to a bag dust collector through an air pipe. The bag dust collector is connected to the bucket elevator through a pipeline.

[0008] The bag dust collector is connected with a cement AQC boiler through a gas pipe, the cement AQC boiler is connected with a chimney, and the cement AQC boiler is also connected with a fluidized bed dryer.

[0009] The exhaust gas discharged from the cement AQC boiler is exhausted to the chimney, and the low-temperature exhaust gas discharged from the cement AQC boiler is exhausted to the fluidized bed dryer.

[0010] The wet sludge in the sludge bin is discharged into the mixing machine, and the cement in the cement raw material bin is discharged into the mixing machine.

[0011] The dust collected in the bag dust collector is transported to the bucket elevator.

[0012] The exhaust gas discharged from the bag dust collector is exhausted into the cement AQC boiler.

[0013] The low-temperature exhaust gas is 400 DEG C, and the exhaustable exhaust gas is 100 DEG C.

[0014] The technical effect of the utility model is that the wet sludge is mixed with the cement raw material powder (the purpose is to increase the flowability of the sludge) into the mixing machine, which is convenient for transportation, and the low-temperature exhaust gas of the AQC is sent into the fluidized bed dryer by the induced draft fan to dry the sludge, so that the boiler steam is not needed to dry the sludge, the power generation capacity is improved, the exhaust gas can be recycled and utilized, and the waste utilization rate is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present specification includes the following drawings, and the shown contents are respectively:

[0016] Figure 1 It is a flow diagram of the sludge drying system utilizing exhaust gas.

[0017] In the figure, the marks are: 1, sludge bin; 2, mixing machine; 3, cement raw material bin; 4, fluidized bed dryer; 5, bucket elevator; 6, drying bin; 7, decomposition furnace; 8, bag dust collector; 9, cement AQC boiler; 10, chimney. DETAILED DESCRIPTION

[0018] The specific embodiments of the utility model are further explained in detail by comparing the drawings and describing the embodiments, the purpose is to help the technical personnel in the art to have more complete, accurate and deep understanding of the utility model concept and technical scheme of the utility model, and to help the implementation.

[0019] Please refer to Figure 1The utility model relates to a sludge drying system with waste gas, which comprises a sludge bin 1, a mixer 2 connected to the sludge bin 1 through a pipeline, a cement raw material bin 3 provided above the mixer 2 for supplying cement, a flow layer dryer 4 connected to the mixer 2 through a pipeline, a bucket elevator 5 connected to the flow layer dryer 4, a dried cement bin 6 connected to the bucket elevator 5, and a decomposition furnace 7 connected to the dried cement bin 6.

[0020] The flow layer dryer is connected to a bag dust collector 8 through an air pipe, and the bag dust collector 8 is connected to the bucket elevator 5 through a pipeline.

[0021] The bag dust collector 8 is connected to a cement AQC boiler 9 through an air pipe, the cement AQC boiler 9 is connected to a chimney 10, and the cement AQC boiler 9 is also connected to the flow layer dryer 4.

[0022] The exhaust gas discharged from the cement AQC boiler 9 is discharged to the chimney 10, and the low-temperature exhaust gas discharged from the cement AQC boiler 9 is sent to the flow layer dryer 4.

[0023] The wet sludge in the sludge bin 1 is discharged into the mixer 2, and the cement in the cement raw material bin 3 is discharged into the mixer 2.

[0024] The dust collected in the bag dust collector 8 is transported to the bucket elevator 5.

[0025] The exhaust gas discharged from the bag dust collector 8 is sent into the cement AQC boiler 9.

[0026] The low-temperature exhaust gas is 400 DEG C, and the exhaustable exhaust gas is 100 DEG C.

[0027] The technical effect of the utility model is that the wet sludge is mixed with cement raw material powder to increase the flowability of the sludge to the mixer 2, facilitating transportation, and the low-temperature exhaust gas of the AQC is sent into the flow layer dryer 4 by a permanent draft fan to dry the sludge, without using boiler steam to dry the sludge, improving power generation capacity, recycling the exhaust gas, and effectively improving the waste utilization rate.

[0028] The utility model has been described exemplarily above in combination with the drawings. Apparently, the utility model is not limited by the above-mentioned mode in the specific implementation. As long as various non-essential improvements are made by adopting the method concept and technical scheme of the utility model; or the above-mentioned concept and technical scheme of the utility model are directly applied to other occasions without improvement, all are within the protection scope of the utility model.

Claims

1. A sludge drying system utilizing exhaust gas, characterized by: Including sludge bin (1), the sludge bin (1) is connected with mixing machine (2) by pipeline, the mixing machine (2) is equipped with cement raw material bin (3) for supplying cement above, the mixing machine (2) is connected with flow layer drying machine (4) by pipeline, the flow layer drying machine (4) is connected with bucket lift (5), the bucket lift (5) is connected with dry cement bin (6), the dry cement bin (6) is connected with decomposition furnace (7).

2. The sludge drying system using exhaust gas according to claim 1, characterized by: The flow layer drying machine is connected with bag dust collector (8) through air pipe, the bag dust collector (8) is connected with bucket lift (5) by pipeline.

3. The sludge drying system using exhaust gas according to claim 2, characterized by: The bag dust collector (8) is connected with cement AQC boiler (9) through air pipe, the cement AQC boiler (9) is connected with chimney (10), and the cement AQC boiler (9) is also connected with flow layer drying machine (4).

4. The sludge drying system using exhaust gas according to claim 3, characterized by: The exhaustible exhaust gas of the cement AQC boiler (9) is discharged to chimney (10), and the low-temperature exhaust gas of the cement AQC boiler (9) is discharged to flow layer drying machine (4).

5. The sludge drying system using exhaust gas according to claim 1, characterized by: The wet sludge in the sludge bin (1) is discharged into the mixing machine (2), and the cement in the cement raw material bin (3) is discharged into the mixing machine (2).

6. The sludge drying system using exhaust gas according to claim 2, characterized by: The dust collected in the bag dust collector (8) is transported to the bucket lift (5).

7. The sludge drying system using exhaust gas according to claim 3, characterized by: The exhaust gas discharged in the bag dust collector (8) is sent into the cement AQC boiler (9).

8. The sludge drying system using exhaust gas according to claim 4, characterized by: The low-temperature exhaust gas is 400 DEG C, and the exhaustible exhaust gas is 100 DEG C.

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