CN102358678B - A sludge drying system - Google Patents

Abstract

The main purpose of the present invention is to provide a sludge drying system. The technical solution is: a sludge drying system, the drying system includes a drying chamber, the drying chamber communicates with the hot air pipeline and the auxiliary heat source pipeline, and the drying chamber includes a wet sludge inlet, a dry sewage mud outlet, moisture outlet, the drying chamber also includes a sludge conveyor belt located inside, the hot air pipeline communicates with the solar heat collector, and the solar heat collector communicates with the fan through the air duct, the A temperature control valve is installed on the auxiliary heat source pipeline. The drying system not only makes effective use of solar energy and hot tail gas or steam discharged from the factory, improves drying efficiency and drying effect, but also increases the stability of the drying system operation.

Description

A sludge drying system

technical field

The invention relates to the field of solid waste treatment, in particular to a sludge drying system.

Background technique

At present, the drying of cyanobacteria mud/sludge uses solar energy, a new green energy source, but the application of solar drying technology has the problem of unstable use of solar energy, such as the intensity of solar energy and the change of seasons, the alternation of daylight, the weather, etc. The condition is directly related, so it directly affects the stable operation of the cyanobacteria mud/sludge drying system. At present, the main method to solve this problem is to use auxiliary energy, that is, when the heat provided by solar energy is not enough to realize the drying of cyanobacteria mud/sludge, the auxiliary energy is provided to the drying room. At present, most of this auxiliary energy is discharged from the factory hot exhaust or steam. However, there are certain problems in practical application, such as when the temperature in the drying room drops due to insufficient solar energy supply, the auxiliary energy cannot be activated in time, which has a direct impact on the drying efficiency, drying effect and the stable operation of the entire drying system.

Contents of the invention

The purpose of the present invention is to provide a sludge drying system with stable operation.

In order to achieve the purpose of the above invention, the technical solution adopted in the present invention is: a sludge drying system, characterized in that: the drying system includes a drying chamber, the drying chamber is connected with a hot air pipeline, an auxiliary heat source pipe The drying chamber includes a wet sludge inlet, a dry sludge outlet, and a moisture discharge port. The drying chamber also includes a sludge conveyor belt located inside it. The hot air pipeline communicates with the solar collector. The solar heat collector communicates with the fan through an air duct, and a temperature control valve is arranged on the auxiliary heat source pipeline.

According to the technical scheme of the present invention, the wet sludge enters the drying chamber through the wet sludge inlet, and runs on the conveyor belt, and is dried by hot air at the same time, until it is dried and discharged from the dry sludge outlet, and the evaporated water vapor passes through When the gas temperature in the hot air pipeline is lower than a certain value, the temperature control valve on the auxiliary heat source pipeline will open the auxiliary heat source to realize the adjustment of the overall temperature in the drying room. The drying system not only makes effective use of solar energy and hot tail gas or steam discharged from the factory, improves drying efficiency and drying effect, but also increases the stability of the drying system operation.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a top structural view of the drying chamber of the present invention.

Detailed ways

A sludge drying system, as shown in Figures 1 and 2: the drying system includes a drying chamber 1, which communicates with a hot air pipeline 6 and an auxiliary heat source pipeline 10, and the drying chamber 1 includes a wet sludge inlet 3, a dry sludge outlet 4, and a moisture discharge port 11. The drying chamber 1 also includes a sludge conveyor belt 2 located inside it, and the hot air pipeline 6 communicates with a solar collector 5 , the solar heat collector 5 communicates with the fan 12 through the air duct 17 , and the auxiliary heat source pipeline 10 is provided with a first temperature control valve 7 . The specific working state is: the wet sludge enters the drying chamber 1 through the wet sludge inlet 3, and runs on the conveyor belt 2, and is dried by hot air at the same time, until it is dried and discharged from the dry sludge outlet 4, and the evaporated water The air is discharged through the dehumidification outlet 11. When the temperature of the gas in the hot air pipeline is lower than a certain value, the first temperature control valve 7 on the auxiliary heat source pipeline 10 opens the auxiliary heat source to realize the control of the overall temperature in the drying chamber 1. adjust. The drying system not only makes effective use of solar energy and hot tail gas or steam discharged from the factory, improves drying efficiency and drying effect, but also increases the stability of the drying system operation.

The first humidity control valve 9 is provided at the dehumidification outlet 11, and the dehumidification outlet 11 is connected with the fan 12 via a dehumidification pipe, and a condenser is installed on the dehumidification pipe. A condenser is installed on the dehumidification pipe, which can remove excess moisture carried in the hot tail gas discharged through the dehumidification pipe, and greatly reduce the humidity of the hot tail gas. In addition, the dehumidification port 11 is connected to the fan 12 through the dehumidification pipe, and by connecting the other end of the fan 12 to the solar heat collector 5, the recycling of hot exhaust gas is realized, the heat collection time of solar energy is shortened, and the efficiency of solar energy is improved. heat collection efficiency.

The hot air pipeline 6 is provided with a second temperature control valve 8 . In this way, when the solar energy supply is insufficient, the second temperature control valve 8 can adjust the flow rate of the hot air, so as to achieve the purpose of adjusting the stability of the drying temperature in the drying system.

The air duct 17 is provided with a third temperature control valve 15 and an exhaust port 13 , and the exhaust port 13 is provided with a second humidity control valve 16 . When the humidity in the drying chamber 1 is too high, the hot air in the drying chamber can be discharged from the exhaust port 13 by opening the second humidity control valve 16 until the humidity reaches the required range; When the drying rate of the mud surface is too fast and the inside is not fully dried, the third temperature control valve 15 can be closed to allow the air to directly enter the drying chamber 1 for cooling treatment.

The drying chamber 1 is a glass structure, and an insulating wall is arranged on the periphery of the base layer of the drying chamber 1, and the insulating wall is made of insulating bricks. The drying chamber 1 is of glass structure, which can directly dry the sludge in the drying chamber 1 by utilizing the solar heat source. When the solar energy is insufficient, the thermal insulation wall can also play the role of thermal insulation to prevent the temperature in the drying room from dropping.

A sludge shaping machine 14 is arranged above the conveyor belt at the wet sludge inlet 3 . The sludge shaping machine 14 makes the blue-green algae mud/sludge into a thin layer, thereby increasing the specific surface area of the blue-green algae mud/sludge, thereby increasing the drying rate of the blue-green algae mud/sludge.

The wet sludge inlet 3 and the dry sludge outlet 4 are located at the lower part of the drying chamber 1. The conveyor belt 2 includes a conveyor belt 21 and a drying belt 22. 3 extends to the upper position of the drying chamber 1, the conveying surface of the drying belt 22 is located in the horizontal direction, and is arranged stepwise from the end of the conveyor belt 21 located at the upper position of the drying chamber 1 along the periphery of the drying chamber 1 to the dry dirt The mud outlet 4 is vertically arranged adjacent to the drying belt 22 . The specific operation state is: the sludge enters from the wet sludge inlet 3 and reaches the conveyor belt 21, and the thinning belt 21 transports it to the drying belt 22 at the highest point of the drying chamber, so that the wet sludge runs on the drying belt , one side is dried by hot air, and falls from the high drying belt 22 to the low drying belt 22 until it is run to the dry sludge outlet 4, which is considered as drying. This setting can make full use of the space of the drying chamber 1, on the one hand, it increases the drying amount of the sludge, on the other hand, it also prolongs the residence time of the sludge in the drying chamber, and strengthens the drying effect of the sludge.

The conveyor belt 2 has a mesh structure, and the conveying surface of the conveyor belt 2 is provided with guide rails arranged in a staggered manner. In this way, the cyanobacteria mud/sludge can advance in waves on the conveyor belt. On the one hand, it is beneficial to the loss of water in the cyanobacteria mud/sludge, and on the other hand, it also prevents the phenomenon of compaction during the transmission of the cyanobacteria mud/sludge.

Claims (5)

1. sludge drying system, it is characterized in that: described anhydration system comprises kiln (1), described kiln (1) and warm air pipeline (6), auxiliary thermal source pipeline (10) is communicated with, described kiln (1) comprises wet mud import (3), dewatered sludge outlet (4), moisture exhausting port (11), described kiln (1) also comprises and is positioned at its inner mud travelling belt (2), described warm air pipeline (6) is communicated with solar energy collector (5), described solar energy collector (5) is communicated with blower fan (12) by air channel (17), described auxiliary thermal source pipeline (10) is provided with first temperature control valve (7), and auxiliary thermal source pipeline (10) is connected with factory's hot exhaust gas or steam outlet; Described moisture exhausting port (11) locates to be provided with the first humidity control valve (9), and described moisture exhausting port (11) links to each other with blower fan (12) via the hydrofuge pipeline, on the described hydrofuge pipeline condenser is housed; Described air channel (17) is provided with the 3rd temperature control valve (15) and venting port (13), and described venting port (13) locates to be provided with the second humidity control valve (16);

Described wet mud import (3), dewatered sludge outlet (4) are positioned at the bottom of kiln (1), described travelling belt (2) comprises material-conveying belt (21) and arid zones (22), described material-conveying belt (21) is in tilted layout, and extend to kiln (1) upper position from wet mud import (3), the conveyor surface of described arid zones (22) is positioned at horizontal direction, and begin to be disposed to dewatered sludge outlet (4) along the peripheral sequential steps of kiln (1) formula from material-conveying belt (21) end that is positioned at kiln (1) upper position, adjacent arid zones (22) is vertical to be arranged.

2. a kind of sludge drying system according to claim 1, it is characterized in that: described warm air pipeline (6) is provided with second temperature control valve (8).

3. a kind of sludge drying system according to claim 1, it is characterized in that: described kiln (1) is glass structure, is positioned at kiln (1) basic unit periphery to be provided with insulated wall, and described insulated wall is made of insulating brick.

4. a kind of sludge drying system according to claim 1 is characterized in that: be furnished with mud shaping machine (14) above the conveying belt that described wet mud import (3) is located.

5. a kind of sludge drying system according to claim 1, it is characterized in that: described travelling belt (2) is reticulated structure, has the guide rail of staggered arrangement on the conveyor surface of described travelling belt (2).

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