Sludge drying system

Abstract

The utility model discloses a sludge drying system which comprises a filter press and a sludge bin connected with an outlet of the filter press, the drying assembly is connected with the sludge bin, the circulating fan is connected with the drying assembly through a pipeline, the drying assembly comprises a heating area and a cooling area, the heating area comprises a compressor, the compressor is connected with the circulating fan, and circulating air is heated by the circulating fan through the compressor and then convects in sludge; the condenser is connected between the circulating fan and the tail gas treatment device and is used for condensing and discharging water vapor in the tail gas discharged by the circulating fan; according to the sludge drying system provided by the utility model, the moisture content of the sludge is reduced, and the heat consumption required by drying is reduced by selecting an economical low-temperature belt type drying technology, so that the sludge can be fully or thoroughly reduced, and the generation amount of hazardous wastes is effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of sludge drying, and in particular relates to a sludge drying system. Background Art

[0002] The description in this section merely provides background information related to the disclosure of the present utility model and does not constitute prior art.

[0003] Sludge contains a high amount of water. The disposal and development and utilization of sludge are increasingly being concerned by people. At present, the main methods of sludge disposal at home and abroad are: ocean dumping, sanitary landfill, sludge composting, sludge incineration, etc. The sludge has a high water content and high viscosity. It is easy to agglomerate and clog the equipment. If it is directly incinerated in the furnace, it will absorb a lot of heat, causing unstable furnace temperature. It will also produce a lot of water vapor to corrode the boiler and affect the safe operation of the boiler. Sludge drying is one of the conventional treatment methods for sludge reduction today. The purpose of sludge drying and reduction is achieved by evaporating the water in the sludge through heat. In the prior art, there is no low-temperature drying process for sludge. After the filter press squeezes out the mud cake with a moisture content of 80%, it is loaded into the iron barrel hazardous waste warehouse for transportation and treatment, and the transportation volume is large.

[0004] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the utility model and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because these solutions are described in the background technology section of the utility model. Utility Model Content

[0005] In order to overcome the defects in the prior art, the utility model provides a sludge drying system to reduce the water content of the sludge and effectively reduce the transportation volume of hazardous wastes.

[0006] The utility model discloses a sludge drying system, comprising:

[0007] a feed assembly, the feed assembly comprising a filter press;

[0008] A sludge bin connected to the outlet of the filter press;

[0009] A drying component and a circulating fan, wherein the drying component is connected to the sludge bin, and the circulating fan is connected to the drying component through a pipeline. The drying component includes a heating area and a cooling area, and the heating area includes a compressor, and the compressor is connected to the circulating fan. The circulating fan heats the circulating air through the compressor and then convects it in the sludge; the condenser is connected between the circulating fan and the tail gas treatment, and is used to condense and discharge the water vapor in the tail gas discharged by the circulating fan;

[0010] A discharging assembly is installed in the next process of the drying assembly, and the discharging assembly includes a discharging mud hopper, and the discharging mud hopper is provided with a vibrator fixedly connected thereto.

[0011] Furthermore, in the above-mentioned sludge drying system, the drying temperature of the drying component is 40°C to 70°C.

[0012] Furthermore, in the above-mentioned sludge drying system, the drying component adopts a Noah's Ark drying machine.

[0013] Furthermore, in the above-mentioned sludge drying system, the sludge dehydrated by the filter press is transported from the bottom of the sludge bin to the drying belt of the dryer.

[0014] Furthermore, in the above-mentioned sludge drying system, the condenser uses cooling water as the cooling medium.

[0015] Furthermore, in the above-mentioned sludge drying system, the discharge sludge hopper packs the sludge particles into bags for transportation.

[0016] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0017] The sludge drying system described in the utility model reduces the water content of the sludge and reduces the heat consumption required for drying by selecting an economical low-temperature belt drying technology, so that the sludge can be fully or completely reduced, and the amount of hazardous waste generated can be effectively reduced.

[0018] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a sludge drying system in an embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of the connection between the drying component and the circulating fan in the embodiment of the utility model.

[0022] The figure numbers of the above drawings are: 1. filter press; 2. sludge bin; 3. drying component; 31. compressor; 32. condenser; 4. circulating fan; 5. discharge component. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] It should be noted that in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, and they cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0025] The utility model is described in detail below with reference to the accompanying drawings and embodiments.

[0026] Reference Figure 1 and Figure 2 , this embodiment provides a sludge drying system, including:

[0027] A feed assembly, the feed assembly comprising a filter press 1;

[0028] A sludge bin 2, wherein the sludge bin 2 is connected to the outlet of the filter press 1;

[0029] A drying component 3 and a circulating fan 4, wherein the drying component 3 is connected to the sludge bin 2, and the circulating fan 4 is connected to the drying component 3 through a pipeline. The drying component 3 includes a heating area and a cooling area, and the heating area includes a compressor 31, and the compressor 31 is connected to the circulating fan 4. The circulating fan 4 heats the circulating air through the compressor 31 and then convects it in the sludge; the condenser 32 is connected between the circulating fan 4 and the tail gas treatment, and is used to condense and discharge the water vapor in the tail gas discharged by the circulating fan 4;

[0030] A discharge assembly 5 is installed in the next process of the drying assembly 3. The discharge assembly 5 includes a discharge mud hopper, and the discharge mud hopper is provided with a vibrator fixedly connected thereto.

[0031] Specifically, in this embodiment, the drying temperature of the drying component 3 is 40°C to 70°C.

[0032] Specifically, in this embodiment, the drying component 3 adopts a Noah's Ark drying machine.

[0033] Specifically, in this embodiment, the sludge dehydrated by the filter press 1 is transported from the bottom of the sludge bin 2 to the drying belt of the dryer.

[0034] Specifically, in this embodiment, the condenser 32 uses cooling water as the cooling medium.

[0035] Specifically, in this embodiment, the discharge hopper bags the sludge particles for transportation. Due to the stickiness of the sludge, the silo of the discharge hopper cannot discharge the sludge normally. If the sludge is retained for a long time, it is easy to ferment in the silo to form a hardened structure, which has a great impact on the normal production of the sludge drying system. When the vibrator is running, the motor of the vibrator rotates at a high speed to generate high-frequency and slight vibrations, which facilitates the discharge of the silo and makes the discharge smooth.

[0036] By means of the above structure, the sludge dehydrated by the filter press 1 is transported from the bottom of the sludge bin 2 to the drying belt of the dryer. The circulating fan 4 heats the circulating air through the compressor 31 and then convects in the sludge, taking away the moisture in the sludge. After condensation by the condenser 32, it returns to the compressor 31 for heating again, and circulates to take away the moisture; the condenser 32 is connected between the circulating fan 4 and the tail gas treatment, and is used to condense the water vapor in the tail gas discharged by the circulating fan 4 and discharge the equipment. The sludge drying system of this embodiment is highly efficient and energy-saving. The wet mud with a moisture content of 80% is dried to dry mud with a moisture content of 10% per ton, and the comprehensive power consumption is as low as 50kW·h. The energy comprehensive application technology is adopted, and the cold and heat are balanced and utilized without heat loss; it is different from the open drying equipment with continuous dehumidification and heat dissipation and continuous high-temperature heating, and the system has better working energy efficiency. The waste heat is fully enclosed and low-temperature drying operation is safe and environmentally friendly, without dust and explosion hazards, and no secondary cooling is required.

[0037] The sludge filter press is a machine that applies mechanical force on one side of the filter medium to achieve filtration. It is mainly used for solid-liquid separation of sludge. The filter plate is pressed tightly by a pressing device, and the suspension is pumped into the filter chamber to separate the solid particles from the liquid particles through the filter cloth.

[0038] In the prior art, there is no low-temperature drying process for sludge. After the filter press presses out a mud cake with a moisture content of 80%, it is loaded into a metal barrel hazardous waste bin for transportation and treatment. Now, after the filter press presses out a mud cake with a moisture content of 80%, it is dried at low temperature to remove most of the moisture and then loaded into a metal barrel hazardous waste bin for transportation and treatment, thereby reducing the amount of hazardous waste transportation. In this embodiment, a Noah's Ark dryer is used for low-temperature drying. The equipment operates in a low-temperature zone, and the COP of the whole machine is above 2. The overall energy-saving effect is obvious. Electricity is used to complete the drying, and no high-temperature heat source is required, which reduces heat source generating devices such as natural gas combustion furnaces and steam boilers; the air circulates internally, and there is no need to equip subsequent complex dust removal, VOC removal and other process equipment; the single-machine equipment has a modular assembly mode and does not require complex engineering equipment; the internal application conditions of the equipment are mild, the service life of the components is long, the equipment is easy to start and stop, and the operation is flexible.

[0039] The utility model uses specific embodiments to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the utility model. At the same time, for ordinary technicians in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A sludge drying system, characterized in that: include: a feed assembly, the feed assembly comprising a filter press; A sludge bin connected to the outlet of the filter press; A drying component, a circulating fan and a condenser, wherein the drying component is connected to the sludge bin, the circulating fan is connected to the drying component through a pipeline, the drying component includes a heating area and a cooling area, the heating area includes a compressor, the compressor is connected to the circulating fan, and the circulating fan heats the circulating air through the compressor and then convects in the sludge; The condenser is connected between the circulating fan and the tail gas treatment, and is used to condense and discharge the water vapor in the tail gas discharged by the circulating fan; A discharging assembly is installed in the next process of the drying assembly, and the discharging assembly includes a discharging mud hopper, and the discharging mud hopper is provided with a vibrator fixedly connected thereto.

2. The sludge drying system according to claim 1, characterized in that: The drying temperature of the drying component is 40°C to 70°C.

3. The sludge drying system according to claim 1, characterized in that: The drying component adopts Noah's Ark drying machine.

4. The sludge drying system according to claim 1, characterized in that: The sludge dehydrated by the filter press is transported from the bottom of the sludge bin to the drying belt of the dryer.

5. The sludge drying system according to claim 1, characterized in that: The condenser uses cooling water as a cooling medium.

6. The sludge drying system according to claim 1, characterized in that: The discharge sludge hopper bags the sludge particles for transportation.

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