Sludge vacuum drying device

Abstract

The utility model discloses a sludge vacuum drying device which comprises a sludge vacuum tank, a vacuum transfer cooling box and a sewage pool, the sludge vacuum tank is connected with the upper end of the vacuum transfer cooling box through a vacuumizing pipe, and the vacuum transfer cooling box is connected with a vacuum pump; a water pipe arranged at the bottom end of the vacuum transfer cooling box is connected with a spraying device arranged at the upper part of the vacuum transfer cooling box through a water pump. The sludge drying device has the advantages that sludge is dried by the aid of vacuum and boiler waste heat, energy consumption is effectively reduced, and the sludge drying device is safe and reliable in operation, easy to maintain, low in operation cost and the like.

Description

Technical Field

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

[0002] The composition of municipal solid waste is affected by seasonality and regionality, and fluctuates greatly, but the overall composition is relatively stable, mainly rubber, paper, plastic, food waste and biomass waste. Its average water content is low and its calorific value is high. Therefore, it is more appropriate to use incineration to treat municipal solid waste.

[0003] In addition to municipal solid waste, sludge treatment is also an important task facing urban development. At present, urban sewage treatment plants produce a large amount of sludge in sewage treatment. Sludge is a very complex heterogeneous body composed of organic sediments, bacteria, inorganic matter and colloids. Its byproduct is usually called urban sewage sludge, with a water content of 80%, an organic content of 40-60%, and sufficient combustion calorific value. Incineration, as a safe and reliable sludge treatment method, can fully recover the energy of sludge, kill pathogens, reduce land occupation, effectively reduce environmental pollution, and reduce environmental protection costs. Therefore, incineration is the most common sludge treatment method. Due to the high water content and low calorific value of sludge, it is suitable for mixed incineration with municipal solid waste. Due to the characteristics of low calorific value, high water content and small air circulation area of ​​sludge, the structure of the existing sludge and municipal solid waste mixed incinerator cannot meet the application requirements, and optimization and improvement design are carried out.

[0004] Therefore, it is of great significance to develop efficient sludge drying technology and equipment. Utility Model Content

[0005] The purpose of the utility model is to provide a sludge vacuum drying device to address the deficiencies in the prior art described above, which dries the sludge by vacuum means and has the advantages of compact equipment layout, safe and reliable operation, easy maintenance, low energy consumption, and low operating costs.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a sludge vacuum drying device, which includes a sludge vacuum tank 3, a vacuum transfer cooling box 5 and a sewage pool 10, the sludge vacuum tank 3 is connected to the upper end of the vacuum transfer cooling box 5 through a vacuum pipe 4, and the vacuum transfer cooling box 5 is connected to a vacuum pump 7.

[0007] A heating jacket 2 is arranged outside the sludge vacuum tank 3 , and the heating jacket 2 is filled with hot water with a temperature of 80-90° C. from a water vapor pipe in the furnace arch area, so as to heat the sludge vacuum tank 3 .

[0008] The sludge inlet of the sludge vacuum tank 3 is connected to the sludge conveyor belt 1 for inputting wet sludge to be dried.

[0009] A water pipe is arranged at the bottom of the vacuum transfer cooling box 5 and connected to a spray device 6 arranged at the upper part of the vacuum transfer cooling box 5 through a water pump 9 to form a spray cooling cycle, and the hot and humid steam drawn into the vacuum pipe 4 is cooled by the spray coolant to form water.

[0010] The water pipe connected to the bottom end of the vacuum transfer cooling box 5 is connected to the heat exchanger 8, and the heat exchanger 8 is connected to the spray device 6 through a water pump. The other inlet of the heat exchanger 8 is connected to the cold water pipe, and the other outlet of the heat exchanger 8 is connected to the boiler, and the hot water that absorbs heat is input into the boiler as make-up water.

[0011] The outlet of the water pump 9 is provided with a second branch pipe connected to the sewage pool 10 . When the cooling water in the vacuum transfer cooling box 5 reaches the warning water level, the valve of the second branch pipe will be opened to discharge part of the sewage formed by cooling into the sewage pool 10 .

[0012] In general, compared with the prior art, the utility model has the following beneficial effects: utilizing vacuum and boiler waste heat to dry sludge, effectively reducing energy consumption, and also having the advantages of safe and reliable operation, easy maintenance, and low operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 The utility model is a structural schematic diagram of a sludge vacuum drying device. DETAILED DESCRIPTION

[0015] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the utility model. In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the utility model.

[0016] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0017] A sludge vacuum drying device, such as Figure 1As shown, it includes a sludge vacuum tank 3, a vacuum transfer cooling box 5 and a sewage pool 10. A heating jacket 2 is arranged outside the sludge vacuum tank 3. The heating jacket 2 is filled with hot water with a temperature of 80-90°C from the water vapor pipe in the furnace arch area, which is used to heat the sludge vacuum tank 3. The sludge inlet of the sludge vacuum tank 3 is connected to the sludge conveyor belt 1, which is used to input the wet sludge to be dried. The sludge in the sludge vacuum tank 3 is dried in batches, and new wet sludge to be dried is added after drying a batch. The sludge vacuum tank 3 is connected to the upper end of the vacuum transfer cooling box 5 through a vacuum pipe 4, and the vacuum transfer cooling box 5 is connected to a vacuum pump 7. The vacuum pump 7 works to evacuate the vacuum transfer cooling box 5, and the vacuum transfer cooling box 5 sucks the sludge vacuum tank 3 through the vacuum pipe 4, so that a vacuum state is formed inside it. Under the suction of the vacuum pipe 4 and the heating of the sludge vacuum tank 3, the moisture in the sludge is extracted and enters the vacuum transfer cooling box 5 to cool and form water.

[0018] The water pipe at the bottom of the vacuum transfer cooling box 5 is connected to the spray device 6 at the top of the vacuum transfer cooling box 5 through a water pump 9 to form a spray cooling cycle, and the hot and wet steam drawn into the vacuum pipe 4 is cooled by the spray coolant to form water. The water pipe connected to the bottom of the vacuum transfer cooling box 5 is connected to the heat exchanger 8, and the heat exchanger 8 is connected to the spray device 6 through a water pump. Another inlet of the heat exchanger 8 is connected to the cold water pipe, and another outlet of the heat exchanger 8 is connected to the boiler, and the hot water that absorbs heat is input into the boiler as make-up water.

[0019] The outlet of the water pump 9 is provided with a second branch pipe connected to the sewage pool 10 . When the cooling water in the vacuum transfer cooling box 5 reaches the warning water level, the valve of the second branch pipe will be opened to discharge part of the sewage formed by cooling into the sewage pool 10 .

[0020] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sludge vacuum drying device, characterized in that: It includes a sludge vacuum tank, a vacuum transfer cooling box and a sewage pool. The sludge vacuum tank is connected to the upper end of the vacuum transfer cooling box through a vacuum pipe, and the vacuum transfer cooling box is connected to a vacuum pump. A water pipe is arranged at the bottom of the vacuum transfer cooling box and is connected to a spray device arranged on the upper part of the vacuum transfer cooling box through a water pump.

2. A sludge vacuum drying device according to claim 1, characterized in that: A heating jacket is arranged outside the sludge vacuum tank, and the heating jacket is filled with hot water with a temperature of 80-90° C. from a water vapor pipe in the furnace arch area.

3. A sludge vacuum drying device according to claim 2, characterized in that: The sludge inlet of the sludge vacuum tank is connected to the sludge conveyor belt.

4. A sludge vacuum drying device according to claim 1, characterized in that: The water pipe connected to the bottom end of the vacuum transfer cooling box is connected to the heat exchanger, the heat exchanger is connected to the spray device through a water pump, another inlet of the heat exchanger is connected to the cold water pipe, and another outlet of the heat exchanger is connected to the boiler.

5. A sludge vacuum drying device according to claim 4, characterized in that: The water pump outlet is provided with a second branch pipe connected to the sewage pool.

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