Biochemical sludge recycling treatment device

Abstract

The utility model relates to the technical field of sludge treatment, in particular to a biochemical sludge recycling treatment device which comprises a secondary sedimentation tank, a stacked screw machine, a sludge drying device and a boiler, an inlet of the secondary sedimentation tank is fixedly communicated with a biochemical sludge feeding pipeline, and a first treatment pipeline is fixedly communicated between a lower outlet of the secondary sedimentation tank and an inlet of the stacked screw machine; and a second treatment pipeline is fixedly communicated between the lower outlet of the stacked screw machine and the inlet of the sludge drying device. The device is reasonable and compact in structure and convenient to use, the biochemical sludge is dried by utilizing flue gas waste heat, the effective heat value of the dried sludge is utilized, the treatment cost is reduced, sludge ash generated after combustion of a boiler can also be used as raw materials of cement and building blocks, the purpose of resource utilization of wastes is achieved, and the device has the characteristics of safety and economy.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge treatment, and is a biochemical sludge recycling and treatment device. Background Technique

[0002] With the increasing environmental protection requirements, the treatment of the three wastes is becoming more and more standardized, and the treatment of biochemical sludge is also a technical problem that needs to be solved urgently. Due to its own characteristics, biochemical sludge is relatively difficult to treat, and the treatment cost is relatively high. Biochemical sludge is the remains of microorganisms and has a certain calorific value, but it cannot be fully utilized, resulting in waste of resources.

[0003] The current mainstream processes for treating biochemical sludge are solid landfill and incineration. Both of these methods have relatively large disadvantages and deficiencies. First of all, landfill not only has high costs and large land occupation areas, but also increases the risk of secondary pollution and requires long-term maintenance. Although the incineration technology is relatively mature, it has disadvantages such as high costs and the need for further treatment of the flue gas dust after incineration.

[0004] There is an urgent need for an economical and efficient treatment method. Summary of the Invention

[0005] The utility model provides a biochemical sludge recycling and treatment device, which overcomes the above-mentioned deficiencies of the prior art and can effectively solve the problems of high treatment costs and increased secondary pollution existing in the existing biochemical sludge treatment methods.

[0006] The technical solution of the utility model is realized by the following measures: a biochemical sludge recycling and treatment device, including a secondary sedimentation tank, a spiral press, a sludge drying device and a boiler. The inlet of the secondary sedimentation tank is fixedly connected with a biochemical sludge feed pipeline. A first treatment pipeline is fixedly connected between the lower outlet of the secondary sedimentation tank and the inlet of the spiral press. A second treatment pipeline is fixedly connected between the lower outlet of the spiral press and the inlet of the sludge drying device. The lower part of the boiler is provided with a coal feeding port. A conveyor belt is arranged between the lower outlet of the sludge drying device and the coal feeding port. The top of the boiler is fixedly connected with a flue gas pipeline. A flue gas inlet pipeline is fixedly connected between the flue gas pipeline and the upper inlet of the sludge drying device. A flue gas outlet pipeline is fixedly connected between the flue gas pipeline corresponding to the upper side of the flue gas inlet pipeline and the upper outlet of the sludge drying device.

[0007] The following is a further optimization and / or improvement of the above-mentioned technical solution of the utility model:

[0008] The inner side of the upper part of the above-mentioned sludge drying device is provided with a heat exchange tube. The heat exchange tube is an S-shaped elbow. A flue gas inlet pipeline is fixedly connected between the flue gas pipeline and the heat exchange tube inlet of the sludge drying device. A flue gas outlet pipeline is fixedly connected between the flue gas pipeline corresponding to the upper side of the flue gas inlet pipeline and the heat exchange tube outlet of the sludge drying device.

[0009] The above S-shaped elbow is composed of at least two straight pipes and a U-shaped elbow connected end to end.

[0010] The above straight pipe is a spiral aluminum finned pipe.

[0011] The above also includes a thermal insulation layer. A thermal insulation layer is provided on the flue gas inlet pipeline, and the thermal insulation layer material is glass wool or composite silicate or rock wool or aluminum silicate wool.

[0012] The upper outlet of the above secondary sedimentation tank is fixedly connected to an upper clear liquid discharge pipeline, and the bottom outlet of the screw press is fixedly connected to a drainage pipeline.

[0013] Sludge pumps are provided on both the above first treatment pipeline and the second treatment pipeline.

[0014] The structure of the present utility model is reasonable and compact, and it is convenient to use. It utilizes the waste heat of the flue gas to dry the biochemical sludge, and utilizes the effective calorific value of the dried sludge, reducing the treatment cost. The sludge ash residue after boiler combustion can also be used as raw materials for cement and blocks, achieving the purpose of waste resource utilization, and having the characteristics of safety and economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 is a schematic process flow diagram of the present utility model.

[0016] Attached Figure 2 is for attached Figure 1 is a top view structural schematic diagram of the sludge drying device in

[0017] Attached Figure 1 The codes in are respectively: 1 is the secondary sedimentation tank, 2 is the screw press, 3 is the sludge drying device, 4 is the boiler, 5 is the biochemical sludge feed pipeline, 6 is the first treatment pipeline, 7 is the second treatment pipeline, 8 is the coal feeding port, 9 is the conveyor belt, 10 is the flue gas pipeline, 11 is the flue gas inlet pipeline, 12 is the flue gas outlet pipeline, 13 is the straight pipe, 14 is the U-shaped elbow, 15 is the upper clear liquid discharge pipeline, 16 is the drainage pipeline, 17 is the sludge pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The present utility model is not limited by the following embodiments, and the specific implementation manners can be determined according to the technical solutions of the present utility model and the actual situation.

[0019] In the present utility model, unless otherwise specified, the equipment and devices used are all existing well-known and commonly used equipment and devices in the art. For example, the screw press can be an existing well-known and commonly used equipment.

[0020] In the present utility model, for the convenience of description, the description of the relative position relationship of each component is carried out according to the layout mode of the attached Figure 1 of the specification. For example, the position relationships such as front, back, up, down, left, and right are based on the attachedFigure 1 It is determined by the layout direction.

[0021] The following further describes the present utility model in conjunction with embodiments and the accompanying drawings:

[0022] Embodiment 1: As shown in the attached Figure 1 figure, the biochemical sludge recycling and reuse treatment device includes a secondary sedimentation tank 1, a spiral press 2, a sludge drying device 3, and a boiler 4. A biochemical sludge feed pipeline 5 is fixedly connected to the inlet of the secondary sedimentation tank 1. A first treatment pipeline 6 is fixedly connected between the lower outlet of the secondary sedimentation tank 1 and the inlet of the spiral press 2. A second treatment pipeline 7 is fixedly connected between the lower outlet of the spiral press 2 and the inlet of the sludge drying device 3. A coal feeding port 8 is provided at the lower part of the boiler 4. A conveyor belt 9 is provided between the lower outlet of the sludge drying device 3 and the coal feeding port 8. A flue gas pipeline 10 is fixedly connected to the top of the boiler 4. A flue gas inlet pipeline 11 is fixedly connected between the flue gas pipeline 10 and the upper inlet of the sludge drying device 3. A flue gas outlet pipeline 12 is fixedly connected between the flue gas pipeline 10 corresponding to the upper side of the flue gas inlet pipeline 11 and the upper outlet of the sludge drying device 3.

[0023] In the present utility model, the biochemical sludge is sent to the secondary sedimentation tank 1 for sedimentation, and then sent to the spiral press 2 for dehydration. Then, the dehydrated biochemical sludge is sent to the sludge drying device 3, and the flue gas waste heat sent by the flue gas pipeline 10 is used to dry the biochemical sludge. The dried biochemical sludge is sent to the boiler 4 for co-firing. The present utility model utilizes the flue gas waste heat to dry the biochemical sludge, and utilizes the effective calorific value of the dried sludge, reducing the treatment cost. The sludge ash residue after the combustion of the boiler 4 can also be used as raw materials for cement and blocks, achieving the purpose of waste resource utilization, and having the characteristics of safety and economy. It effectively solves the problems of high treatment cost and increased secondary pollution existing in the existing biochemical sludge treatment methods.

[0024] According to actual needs, the above-mentioned biochemical sludge recycling and reuse treatment device can be further optimized and / or improved:

[0025] Embodiment 2: The difference from Embodiment 1 is that: as shown in the attached Figure 1 , 2 figure, a heat exchange tube is provided inside the upper part of the sludge drying device 3. The heat exchange tube is an S-shaped elbow. A flue gas inlet pipeline 11 is fixedly connected between the flue gas pipeline 10 and the heat exchange tube inlet of the sludge drying device 3. A flue gas outlet pipeline 12 is fixedly connected between the flue gas pipeline 10 corresponding to the upper side of the flue gas inlet pipeline 11 and the heat exchange tube outlet of the sludge drying device 3. During use, the flue gas waste heat is sent to the heat exchange tube in the upper part of the sludge drying device 3 to dry the dehydrated biochemical sludge.

[0026] Embodiment 3: The difference from Embodiment 2 is that: as shown in the attached Figure 2As shown, the S-shaped elbow is composed of at least two straight pipes 13 and a U-shaped elbow 14 connected end to end.

[0027] Example 4: The difference from Example 3 is that, as shown in the appendix Figure 2 As shown, according to requirements, the straight pipe 13 is a spiral aluminum finned tube. Through such a setting, the heat dissipation effect is better, and the drying speed of the dewatered biochemical sludge is faster.

[0028] Example 5: The difference from Examples 1 to 4 is that, according to requirements, it further includes a heat preservation layer. A heat preservation layer is provided on the flue gas inlet pipeline 11, and the heat preservation layer material is glass wool or composite silicate or rock wool or aluminum silicate wool. Through such a setting, the waste heat of the flue gas is effectively insulated.

[0029] Example 6: The difference from Examples 1 to 5 is that an upper clear liquid discharge pipeline 15 is fixedly connected to the upper outlet of the secondary sedimentation tank 1, and a drainage pipeline 16 is fixedly connected to the bottom outlet of the spiral press 2.

[0030] Example 7: The difference from Examples 1 to 6 is that, as shown in the appendix Figure 1 As shown, sludge pumps 17 are provided on both the first treatment pipeline 6 and the second treatment pipeline 7.

[0031] According to requirements, on each pipeline and equipment of the biochemical sludge recycling treatment device, conventional valves, thermometers, pressure gauges, etc. well-known and commonly used in the art can also be provided according to production needs.

[0032] The above technical features constitute the embodiments of the present utility model, which have strong adaptability and implementation effects. Non-essential technical features can be increased or decreased according to actual needs to meet the requirements of different situations.

[0033] The using process of the embodiments of the present utility model: First, the biochemical sludge is sent to the secondary sedimentation tank 1 through the biochemical sludge feed pipeline 5 for sedimentation, and then sent to the spiral press 2 through the first treatment pipeline 6 for dehydration. Then, the dehydrated biochemical sludge is sent to the sludge drying device 3 through the second treatment pipeline 7. At the same time, the flue gas sent by the flue gas pipeline 10 of the boiler 4 is sent into the heat exchange tube in the sludge drying device 3 through the flue gas inlet pipeline 11, and the biochemical sludge is dried by the waste heat of the flue gas. The dried biochemical sludge is sent to the coal feeding port 8 of the boiler 4 through the conveyor belt 9 for co-combustion, and the burned sludge ash can also be used as raw materials for cement and blocks.

Claims

1. A biochemical sludge recycling and treatment device, characterized in that It includes a secondary sedimentation tank, a spiral press, a sludge drying device and a boiler. The inlet of the secondary sedimentation tank is fixedly connected to a biochemical sludge feeding pipeline. There is a fixedly connected first treatment pipeline between the lower outlet of the secondary sedimentation tank and the inlet of the spiral press. There is a fixedly connected second treatment pipeline between the lower outlet of the spiral press and the inlet of the sludge drying device. A coal feeding port is provided at the lower part of the boiler. A conveyor belt is provided between the lower outlet of the sludge drying device and the coal feeding port. A flue gas pipeline is fixedly connected to the top of the boiler. There is a fixedly connected flue gas inlet pipeline between the flue gas pipeline and the upper inlet of the sludge drying device. There is a fixedly connected flue gas outlet pipeline between the flue gas pipeline corresponding to the upper side of the flue gas inlet pipeline and the upper outlet of the sludge drying device.

2. The biochemical sludge recycling treatment device according to claim 1, wherein Heat exchange tubes are provided inside the upper part of the sludge drying device. The heat exchange tubes are S-shaped bent tubes. There is a fixedly connected flue gas inlet pipeline between the flue gas pipeline and the heat exchange tube inlet of the sludge drying device. There is a fixedly connected flue gas outlet pipeline between the flue gas pipeline corresponding to the upper side of the flue gas inlet pipeline and the heat exchange tube outlet of the sludge drying device.

3. The biochemical sludge recycling and reuse treatment device according to claim 2, characterized in that The S-shaped bent tube is formed by connecting at least two straight tubes and a U-shaped bent tube end to end.

4. The biochemical sludge recycling treatment device according to claim 3, characterized in that The straight tube is a spiral aluminum finned tube.

5. The biochemical sludge recycling treatment device according to claim 1 or 2 or 3 or 4, characterized in that It also includes a thermal insulation layer. The thermal insulation layer is provided on the flue gas inlet pipeline. The thermal insulation layer material is glass wool or composite silicate or rock wool or aluminum silicate wool.

6. The biochemical sludge recycling treatment device according to claim 1 or 2 or 3 or 4, characterized in that The upper outlet of the secondary sedimentation tank is fixedly connected to an upper clear liquid discharge pipeline. The bottom outlet of the spiral press is fixedly connected to a drainage pipeline.

7. The biochemical sludge recycling treatment device according to claim 5, characterized in that The upper outlet of the secondary sedimentation tank is fixedly connected to an upper clear liquid discharge pipeline. The bottom outlet of the spiral press is fixedly connected to a drainage pipeline.

8. The biochemical sludge recycling treatment device according to claim 1 or 2 or 3 or 4 or 7, characterized in that Sludge pumps are provided on both the first treatment pipeline and the second treatment pipeline.

9. The biochemical sludge recycling treatment device according to claim 5, characterized in that Sludge pumps are provided on both the first treatment pipeline and the second treatment pipeline.

10. The biochemical sludge recycling treatment device according to claim 6, characterized in that Sludge pumps are provided on both the first treatment pipeline and the second treatment pipeline.

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