Anaerobic pyrolysis and drying equipment for treating sludge in full quantitative manner through leachate

Abstract

The utility model provides sludge anaerobic pyrolysis drying equipment for full-quantitative treatment of leachate. Sludge generated by a traditional leachate treatment method is dewatered in advance through the sludge pretreatment device, then the sludge is subjected to pyrolysis treatment under the anaerobic or low-oxygen condition through the anaerobic pyrolysis reactor in the anaerobic pyrolysis treatment device, and finally, the sludge is subjected to pyrolysis treatment through the anaerobic pyrolysis reactor in the anaerobic pyrolysis treatment device. A product collecting device is used for collecting pyrolysis gas, pyrolysis oil and solid residues generated in the anaerobic pyrolysis reactor in the pyrolysis process; therefore, before sludge generated by a traditional leachate treatment method is discharged, organic matters in the sludge can be converted into pyrolysis gas, pyrolysis oil and solid residues, and reduction, harmlessness and resource utilization of the sludge are realized; the utility model belongs to the technical field of leachate treatment.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of leachate treatment, especially relates to a leachate full -scale treatment sludge anaerobic pyrolysis drying equipment. BACKGROUND

[0002] Leachate is a kind of high-concentration organic wastewater generated in the process of garbage filling or transfer, and it contains heavy metals, high-concentration toxic organic matter, high COD, high ammonia nitrogen and other components, so it can cause serious pollution to the environment. The traditional leachate treatment method includes biochemical treatment, membrane treatment and evaporation treatment, but these methods often produce a large amount of sludge in the treatment process, and the sludge contains a large amount of undegraded organic matter and harmful substances, which is difficult to discharge or reuse directly.

[0003] At present, the treatment methods of sludge mainly include landfill, incineration and composting, but these methods have problems such as large land occupation, high treatment cost and easy secondary pollution. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a leachate full -scale treatment sludge anaerobic pyrolysis drying equipment to further treat sludge, reduce environmental pollution and realize the reduction, harmlessness and resource utilization of sludge.

[0005] The leachate full -scale treatment sludge anaerobic pyrolysis drying equipment includes:

[0006] The sludge pretreatment device is used for dewatering the sludge generated in the leachate full -scale treatment process to reduce the moisture content of the sludge;

[0007] The anaerobic pyrolysis treatment device is provided with an anaerobic pyrolysis reactor, and the anaerobic pyrolysis reactor is provided with a heating module, the input end of the anaerobic pyrolysis treatment device is connected with the output end of the sludge pretreatment device, so that the sludge pretreatment device can send the pretreated sludge into the anaerobic pyrolysis reactor, and the anaerobic pyrolysis reactor is used to give the sludge an anaerobic or low-oxygen environment, and the heating module is used to pyrolyze the sludge under anaerobic or low-oxygen conditions;

[0008] The product collecting device is used to collect the pyrolysis gas, pyrolysis oil and solid residue generated in the pyrolysis process in the anaerobic pyrolysis reactor respectively.

[0009] Based on the above technical scheme, the present application has the following advantages:

[0010] The sludge generated by the traditional leachate treatment method is subjected to dewatering treatment by a sludge pretreatment device in advance, and then subjected to pyrolysis treatment under anaerobic or low-oxygen conditions by using an anaerobic pyrolysis reactor in an anaerobic pyrolysis treatment device, and finally, pyrolysis gas, pyrolysis oil and solid residues generated in the pyrolysis process in the anaerobic pyrolysis reactor are collected by using a product collection device; therefore, the organic matter in the sludge generated by the traditional leachate treatment method can be converted into pyrolysis gas, pyrolysis oil and solid residues before the sludge is discharged, so that the sludge is reduced, harmless and resourcefully utilized.

[0011] In order to further optimize the above technical solutions, one or more of the following embodiments can be combined without conflict.

[0012] In some embodiments, the heating module is a heating module capable of controlling the pyrolysis temperature to be between 300°C and 500°C, and the heating module is provided with a temperature monitoring unit;

[0013] According to the technical solution, the heating module can more stably and efficiently pyrolyze the sludge under anaerobic or low-oxygen conditions.

[0014] In some embodiments, the heating module is provided with a timer for controlling the pyrolysis time;

[0015] According to the technical solution, the corresponding pyrolysis time can be set according to the type and water content of the sludge.

[0016] In some embodiments, the product collection and treatment device is provided with a purifier for purifying the pyrolysis gas to be used as fuel or chemical raw material;

[0017] In some embodiments, the product collection and treatment device is provided with a pyrolysis oil regulator for converting the pyrolysis oil into biodiesel;

[0018] In some embodiments, the product collection and treatment device is provided with a residue processor for harmless treatment of the solid residues to be used as building materials or landfill covering materials;

[0019] According to the above technical solution, the pyrolysis gas and pyrolysis oil generated by the pyrolyzed sludge can be used as fuel or chemical raw material, and the solid residues can be used as building materials or landfill covering materials, so as to further resourcefully utilize the sludge.

[0020] In some embodiments, the leachate full-scale sludge anaerobic pyrolysis drying device further comprises a waste gas processor, the input end of the waste gas processor is connected with the waste gas output end of the anaerobic pyrolysis treatment device, and the waste gas processor is used for dust removal, desulfurization and denitration treatment of the waste gas output by the anaerobic pyrolysis treatment device.

[0021] According to the technical scheme, waste gas generated in the oxygen-free pyrolysis process is purified to meet the emission standard, so that environmental pollution can be effectively avoided when the waste gas is discharged. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the specific embodiment in the utility model, the following will be described in the specific embodiment of the need to use the drawing and the label make a simple explanation.

[0023] Figure 1 It is the working procedure schematic diagram of the utility model;

[0024] Figure 2 It is the structure layout drawing of the utility model.

[0025] Reference signs:

[0026] 1, sludge pretreatment device; 2, oxygen-free pyrolysis treatment device; 21, oxygen-free pyrolysis reactor; 22, heating module; 221, temperature monitoring unit; 222, timer; 3, product collection device; 31, purifier; 32, pyrolysis oil regulator; 33, residue processor; 4, waste gas processor. DETAILED DESCRIPTION

[0027] INTRODUCTION

[0028] Leachate is a kind of high-concentration organic wastewater generated in the process of landfill or transfer, which contains heavy metals, high-concentration toxic organic matter, high COD, high ammonia nitrogen and other components, so it can cause serious pollution to the environment. The traditional leachate treatment methods include biochemical treatment, membrane treatment and evaporation treatment, etc., but these methods often produce a large amount of sludge in the treatment process, and the sludge contains a large amount of undegraded organic matter and harmful substances, which is difficult to be directly discharged or reused.

[0029] At present, the main methods for sludge treatment include landfill, incineration and composting, etc., but these methods have problems such as large land occupation, high treatment cost, easy to cause secondary pollution, etc.

[0030] As a new sludge treatment method, oxygen-free pyrolysis drying technology has the advantages of high treatment efficiency, significant reduction effect, high product utilization value, etc., so it has gradually attracted attention.

[0031] Based on the above, the technical scheme of the specific embodiment relates to the field of environmental protection technology, especially an equipment and method for oxygen-free pyrolysis drying of sludge generated in the full-quantitative treatment process of leachate, aiming to improve the sludge treatment efficiency, reduce environmental pollution, and realize the reduction, harmlessness and resource utilization of sludge.

[0032] CONTENT

[0033] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the following will be illustrated with reference to the drawings.

[0034] As Figure 1 and 2 The present embodiment provides a leachate full-quantitative treatment sludge anaerobic pyrolysis drying equipment, which comprises a sludge pretreatment device 1, an anaerobic pyrolysis treatment device 2, a product collection device 3 and a waste gas processor 4.

[0035] The sludge pretreatment device 1 is used for dewatering the sludge generated in the leachate full-quantitative treatment process to reduce the water content of the sludge and facilitate subsequent pyrolysis treatment. The sludge pretreatment device 1 can be a centrifugal dewatering machine or a water evaporation machine.

[0036] The anaerobic pyrolysis treatment device 2 is provided with an anaerobic pyrolysis reactor 21, and the anaerobic pyrolysis reactor 21 is provided with a heating module 22. The input end of the anaerobic pyrolysis treatment device 2 is connected with the output end of the sludge pretreatment device 1, so that the sludge pretreatment device 1 can send the pretreated sludge into the anaerobic pyrolysis reactor 21. The anaerobic pyrolysis reactor 21 is used for creating an anaerobic or low-oxygen environment for the sludge, and the heating module 22 is used for pyrolyzing the sludge under the anaerobic or low-oxygen condition. The heating module 22 is capable of controlling the pyrolysis temperature between 300℃ and 500℃, and is provided with a temperature monitoring unit 221. The heating module 22 is provided with a timer 222 for controlling the pyrolysis time, so that the corresponding pyrolysis time can be set according to the type and water content of the sludge. Further, the anaerobic pyrolysis treatment device 2 is provided with a container for placing the sludge, and the anaerobic pyrolysis reactor 21 is used for processing the sludge in the container, i.e. the anaerobic pyrolysis reactor 21 can be used for extracting or reducing the oxygen in the container. The heating module 22 is used for heating the sludge in the container, and the heating module 22 can be a conventional electric heater or gas stove.

[0037] The product collecting device 3 is connected with the output end of the anaerobic pyrolysis treatment device 2, and is used for collecting the pyrolysis gas, pyrolysis oil and solid residue generated in the pyrolysis process in the anaerobic pyrolysis reactor 21. The product collecting device 3 can be provided with a plurality of air compressors and material compressors, the input ends of the air compressors and the material compressors are connected with the output end of the anaerobic pyrolysis treatment device 2, so as to compress, pack and input the pyrolysis gas, pyrolysis oil and solid residue generated in the anaerobic pyrolysis treatment device 2 into corresponding storage containers. Further, the product collecting and processing device is provided with a purifier 31 used for purifying the pyrolysis gas to be used as fuel or chemical raw material, the purifier 31 can be a filter screen purification structure or a gas washing tower; the product collecting and processing device is provided with a pyrolysis oil regulator 32 used for converting the pyrolysis oil into bio-diesel, the pyrolysis oil regulator 32 can include a conveying device used for conveying the pyrolysis oil into a temporary storage container, and a regulating device used for adding chemical agents or biological agents to the pyrolysis oil in the temporary storage container, so as to convert the pyrolysis oil into bio-diesel; the product collecting and processing device is provided with a residue processor 33 used for harmless treatment of the solid residue to be used as building material or landfill covering material, the residue processor 33 can be a mechanism used for drying and disinfecting the solid residue, so that the solid residue can be used as building material or landfill covering material after treatment; thus, the pyrolysis gas and pyrolysis oil generated in the pyrolysis of the sludge can be used as fuel or chemical raw material, and the solid residue can be used as building material or landfill covering material, so as to further utilize the sludge resources.

[0038] The waste gas processor 4 is connected with the waste gas output end of the anaerobic pyrolysis treatment device 2, and is used for dust removal, desulfurization and denitration treatment of the waste gas output by the anaerobic pyrolysis treatment device 2, and can be a gas washing tower or a filter screen structure. Thus, the waste gas generated in the anaerobic pyrolysis process can be purified and treated to reach the emission standard, so that the environmental pollution can be effectively avoided when the waste gas is discharged. The purifier 31 can be an exchanger of a filter screen purification structure or a purifier 31 outputting chemical substances. The waste gas processor 4 is specifically used for dust removal, desulfurization, denitration and the like of the waste gas to be discharged, so as to ensure that the waste gas meets the emission standard.

[0039] Based on the above technical scheme, the following specific embodiments describe the working principle of the leachate full-quantitative treatment sludge anaerobic pyrolysis drying equipment.

[0040] The sludge generated by the conventional leachate treatment method is subjected to dewatering treatment by the sludge pretreatment device 1 in advance, and then subjected to pyrolysis treatment under anaerobic or low-oxygen conditions by the anaerobic pyrolysis reactor 21 in the anaerobic pyrolysis treatment device 2, and finally the pyrolysis gas, pyrolysis oil and solid residue generated in the pyrolysis process in the anaerobic pyrolysis reactor 21 are collected by the product collection device 3; therefore, the organic matter in the sludge generated by the conventional leachate treatment method can be converted into pyrolysis gas, pyrolysis oil and solid residue before the sludge is discharged, realizing the reduction, harmless treatment and resource utilization of the sludge.

[0041] Based on the above technical solution, the following specific embodiments of the present application have the following beneficial effects.

[0042] 1. Significant sludge reduction effect, through anaerobic pyrolysis technology, the volume of sludge can be reduced by more than 80%, greatly reducing the difficulty and cost of sludge disposal;

[0043] 2. Harmless treatment, during the anaerobic pyrolysis process, the organic matter in the sludge is converted into pyrolysis gas, pyrolysis oil and solid residue, harmful substances are effectively decomposed and fixed, realizing the harmless treatment of the sludge;

[0044] 3. Resource utilization, pyrolysis gas and pyrolysis oil can be used as fuel or chemical raw material, and solid residue can be used as building material or landfill covering material, realizing the resource utilization of the sludge.

[0045] 4. Environmentally friendly, the exhaust gas generated during the anaerobic pyrolysis process is treated and meets the emission standard, avoiding secondary pollution to the environment.

[0046] In summary, the anaerobic pyrolysis drying device for leachate full-scale sludge treatment realizes the reduction, harmless treatment and resource utilization of the sludge through anaerobic pyrolysis technology, which has the advantages of high treatment efficiency, significant reduction effect and high value of products, and has important significance for solving the problem of sludge generated in the leachate treatment process.

Claims

1. A leachate total quantification treatment sludge anaerobic pyrolysis drying equipment, characterized in that, The application relates to a sludge pretreatment device (1) for dewatering sludge generated in a leachate full-scale treatment process to reduce the water content of the sludge, an anaerobic pyrolysis treatment device (2) provided with an anaerobic pyrolysis reactor (21) and a heating module (22) installed in the anaerobic pyrolysis reactor (21), wherein the input end of the anaerobic pyrolysis treatment device (2) is connected with the output end of the sludge pretreatment device (1) so that the sludge pretreated by the sludge pretreatment device (1) can be sent into the anaerobic pyrolysis reactor (21), the anaerobic pyrolysis reactor (21) is used for providing an anaerobic or low-oxygen environment for the sludge, and the heating module (22) is used for pyrolyzing the sludge under the anaerobic or low-oxygen condition, a product collecting device (3) provided with an input end connected with the output end of the anaerobic pyrolysis treatment device (2) and used for collecting pyrolysis gas, pyrolysis oil and solid residues generated in the pyrolysis process in the anaerobic pyrolysis reactor (21). The heating module (22) is a heating module (22) capable of controlling the pyrolysis temperature to be between 300 DEG C and 500 DEG C, and is provided with a temperature monitoring unit (221). The heating module (22) is provided with a timer (222) for controlling the pyrolysis time. The product collecting device is provided with a purifier (31) for purifying the pyrolysis gas to be used as fuel or chemical raw material.

2. The leachate total quantification treatment sludge anaerobic pyrolysis drying device according to claim 1, characterized in that: The product collecting device is provided with a pyrolysis oil regulator (32) for converting the pyrolysis oil into biodiesel.

3. The leachate total quantification treatment sludge anaerobic pyrolysis drying device according to claim 2, characterized in that: The product collecting device is provided with a residue processor (33) for harmless treatment of the solid residues to be used as building materials or landfill covering materials.

4. The leachate total quantification treatment sludge anaerobic pyrolysis drying device according to claim 1, characterized in that: The application further relates to a waste gas processor (4) provided with an input end connected with the waste gas output end of the anaerobic pyrolysis treatment device (2) and used for dust removal, desulfurization and denitration treatment of the waste gas output by the anaerobic pyrolysis treatment device (2).

5. The leachate total quantification treatment sludge anaerobic pyrolysis drying device according to claim 4, characterized in that: ​ 6. The leachate total quantification treatment sludge anaerobic pyrolysis drying device according to claim 5, characterized in that: ​ 7. The leachate total quantization treatment sludge anaerobic pyrolysis drying device according to claim 1, characterized in that, ​ ​

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