A device for removing water vapor inside a sludge biological drying reactor

Abstract

The present invention discloses a device for removing water vapor from an internal sludge biological drying reactor, comprising a reactor, an air inlet pipe and an air outlet pipe provided at one end of the reactor, the air inlet pipe being connected to a Roots blower, an aeration pipe provided within the reactor, the air inlet pipe being connected to and in communication with the end of the aeration pipe, the Roots blower conveying external air into the aeration pipe to generate aeration, and a water vapor removal device provided on the reactor. Compared to methods for removing water vapor such as forced ventilation and increasing the aeration volume, the device for removing water vapor from an internal sludge drying reactor provided by the present invention significantly reduces heat loss within the reactor, removes water vapor while avoiding a reduction in the duration of the high-temperature period, and shortens the sludge biological drying cycle.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge resource utilization, and in particular to a device for removing water vapor inside a sludge biological drying reactor. Background Art

[0002] Sludge biological drying is a process in which aerobic microorganisms release heat from the metabolism of organic matter under aerobic conditions to maintain a high temperature in the system, and remove moisture from the material through ventilation and stirring. It is a technology that relies on biodegradation to achieve sludge reduction.

[0003] The high temperature period is the most important part of sludge biological drying. Water evaporates in large quantities during the high temperature period. Maintaining the temperature and duration of the high temperature period can better remove water, and can also provide a good growth environment for thermophilic microorganisms and maintain their activity. Usually, in order to prevent the condensation and reflux of water vapor, the high temperature stage needs to be combined with forced ventilation or increased aeration volume to accelerate the flow of high-humidity gas or water vapor to the external environment of the reactor, thereby achieving the purpose of water removal. However, forced ventilation during the high temperature period will take away a large amount of heat from the internal reactor, lower the temperature of the high temperature system and shorten the duration of the high temperature period, thereby slowing down the evaporation rate of water in the sludge and reducing the evaporation amount, resulting in a longer sludge biological drying cycle, affecting its market application. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a device for removing water vapor inside a sludge biological drying reactor, which can remove internal water vapor while greatly reducing heat loss inside the reactor and improve the sludge biological drying efficiency.

[0005] To achieve the above-mentioned object, the present invention provides a device for removing water vapor inside a sludge biological drying reactor, comprising a reactor, an air inlet pipe and an air outlet pipe being provided at the end of the reactor, the air inlet pipe being connected to a Roots blower, an aeration pipe being provided inside the reactor, the air inlet pipe being connected to the end of the aeration pipe and being in communication therewith, the Roots blower conveying external air into the aeration pipe to generate aeration, and the water vapor removal device being provided on the reactor;

[0006] The water vapor removal device includes a water vapor circulation pipe, which is fixedly arranged on the reactor, one end of which extends into the reactor to connect to the water absorption plate, and the other end extends out of the reactor;

[0007] The main body of the water absorption disc is made of a composite water-absorbing material prepared by aqueous solution polymerization of sodium polyacrylate and carbon nanotubes. It has a thin arc-shaped space inside and is distributed with micro water vapor channels. The water absorption disc is tightly connected to the inner wall of the reactor, and the back is integrally connected to the water vapor circulation pipe.

[0008] The other end of the water vapor circulation pipe is connected to and communicates with the negative pressure pipe. The negative pressure pipe wraps the outer opening of the water vapor circulation pipe. The bottom of the pipe is fixed to the outer wall of the reactor and is tightly sealed. A wind wheel is provided at the pipe opening of the negative pressure pipe, and an energy supply device is provided on the reactor to provide energy for the rotation of the wind wheel.

[0009] Further technology of the present invention:

[0010] Preferably, a gear-type ring gear is fixedly provided on the reactor, which is engaged with the driving gear. The air inlet pipe extends into the reactor to connect to a movable adapter. The movable adapter is provided with an annular groove, and an air hole is provided in the annular groove. A ring is provided on the annular groove, and an air channel is provided on the ring to communicate with the air hole. The ring is provided with a connecting pipe to communicate with the end of the aeration pipe.

[0011] Preferably, the energy supply device is composed of a solar power generation panel and a photovoltaic cell, and relies on solar energy to generate electricity, stores the electrical energy in the photovoltaic cell, and supplies power to the micro motor, which drives the wind wheel to rotate.

[0012] Preferably, the method of use is that the water absorption disk comes into contact with the high-humidity gas inside the reactor to absorb water vapor in the water absorption disk, and at the same time, the wind wheel is driven by the energy of the rotation of the reactor. When the wind wheel rotates, a slight negative pressure is formed in the negative pressure pipe and the water vapor circulation pipe. Tiny water droplets formed by the liquefaction of water vapor in the water absorption disk are gathered in the water vapor circulation pipe under the action of negative pressure and are drawn out of the reactor through the negative pressure pipe.

[0013] Compared with the prior art, the present invention has the following technical effects:

[0014] 1. The device for removing water vapor from the internal part of the sludge drying reactor provided by the present invention discharges the internal water vapor into the environment by the combined effect of the water absorption of the hydrophilic material and the slight negative pressure. The entire device is simple to construct and reliable in operation.

[0015] 2. The internal water vapor removal device of the sludge drying reactor provided by the present invention greatly reduces the heat loss inside the reactor compared with methods of discharging water vapor such as forced ventilation and increasing the aeration volume. While removing water vapor, it avoids the reduction of the duration of the high temperature period and shortens the sludge biological drying cycle.

[0016] 3. The internal water vapor removal device of the sludge drying reactor provided by the present invention mainly relies on the energy of the reactor rotation to drive the operation of the device; when the reactor stops rotating, solar energy is used as an auxiliary energy source to maintain the operation of the device. The energy consumption of the sludge biological drying system will not be increased during the operation of the entire device, which is energy-saving and environmentally friendly, and conforms to the low energy consumption advantage of biological drying.

[0017] 4. The internal water vapor removal device of the sludge drying reactor provided by the present invention has a small size and a simple structure. The number and installation position of the device can be adjusted according to the size of the reactor to meet the use requirements of different reactors. It is flexible and convenient in actual application.

[0018] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute part of this application, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a front view of the device of the present invention;

[0021] Figure 2 is a top view of the device of the present invention;

[0022] Figure 3 It is an enlarged structural schematic diagram of the device of the present invention;

[0023] Figure 4 Schematic cross-sectional view of the movable adapter of the present invention;

[0024] Among them: 1-Roots blower, 2-inlet pipe, 3-drive gear, 4-reactor, 5-aeration pipe, 6-outlet pipe, 7-water vapor removal device, 8-water vapor circulation pipe, 9-water absorption disc, 10-micro water vapor channel, 11-gear type gear ring, 12-fixing nut, 13-negative pressure pipe, 14-wind wheel, 15-micro motor, 16-solar power generation panel, 17-photovoltaic cell, 18-movable adapter, 19-annular groove, 20-air hole, 21-ring, 22-air channel, 23-connecting pipe. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0026] Example 1:

[0027] A device for removing water vapor inside a sludge biological drying reactor 7,

[0028] It includes a reactor 4, an air inlet pipe 2 and an air outlet pipe 6 are provided at the end of the reactor 4, the air inlet pipe 2 is connected to the Roots blower 1, an aeration pipe 5 is provided in the reactor 4, the air inlet pipe 2 is connected to the end of the aeration pipe 5 and is communicated, the Roots blower 1 transports external gas into the aeration pipe 5 to generate aeration, and a water vapor removal device 7 is provided on the reactor 4.

[0029] The reactor 4 is fixed with a gear ring 11, which is engaged with the drive gear 3. It should be noted that the drive gear 3 in the present invention is driven by an external power, such as a motor. This driving method is a conventional driving method and will not be described in detail in the present invention.

[0030] The air inlet pipe 2 extends into the reactor 4 and is connected to the movable adapter 18. The movable adapter is provided with an annular groove 19, and an air hole 20 is provided in the annular groove. A collar 21 is sleeved on the annular groove, and an air channel 22 is provided in the collar to communicate with the air hole. A connecting pipe 23 is provided on the collar to communicate with the end of the aeration pipe 5, thereby realizing the connection between the air inlet pipe 2 and the aeration pipe 5 without affecting the rotation of the aeration pipe 5 when the reactor rotates.

[0031] The water vapor removal device 7 includes a water vapor circulation pipe 8, which is fixed to the reactor 4 through a fixing nut 12. One end of the water vapor circulation pipe 8 extends into the reactor 4 to connect to the water absorption disk 9, and the other end extends out of the reactor 4.

[0032] The main body of the water absorption disk 9 is made of a composite water-absorbing material prepared by aqueous solution polymerization of sodium polyacrylate and carbon nanotubes. It is highly absorbent and has a thin arc-shaped space inside and is distributed with micro water vapor channels 10. The water absorption disk 9 is tightly connected to the inner wall of the reactor, and the back is integrally connected to the water vapor circulation pipe 8.

[0033] The other end of the water vapor circulation pipe 8 is connected to and communicates with the negative pressure pipe 13. The negative pressure pipe 13 wraps the outer opening of the water vapor circulation pipe 8. The bottom of the pipe is fixed to the outer wall of the reactor and is tightly sealed. A wind wheel 14 is provided at the pipe opening of the negative pressure pipe 13.

[0034] The reactor 4 is provided with an energy supply device to provide energy for the rotation of the wind wheel 14.

[0035] When in use, the water absorption disk 9 comes into contact with the high-humidity gas inside the reactor 4 (the high-humidity gas inside the reactor 4 means that materials, including sludge, bacterial agents and sawdust, are added to the reactor 4. After these materials are mixed, a biochemical reaction will occur. As the reaction proceeds, the temperature of the material pile will continue to rise. As the temperature rises, the moisture in the mixed material evaporates due to heat, and high-humidity gas is generated inside the reactor 4). The water vapor is adsorbed in the water absorption disk 9, and at the same time, the energy of the rotation of the reactor 4 drives the wind wheel 14. When the wind wheel 14 rotates, a slight negative pressure is formed in the negative pressure pipe 13 and the water vapor circulation pipe 8. The tiny water droplets formed by the liquefaction of water vapor in the water absorption disk 9 are gathered in the water vapor circulation pipe 8 under the action of the negative pressure, and are drawn out of the reactor 4 through the negative pressure pipe 13.

[0036] Furthermore, the aforementioned moisture removal device is suitable for use in a sludge biological drying reactor. Gas enters through the aeration pipe at the bottom of the reactor 4 and flows out through the exhaust pipe directly behind it. A water vapor removal device 7 is installed within the reactor 4. When in use, the water absorption disc 9, through contact with the high-humidity gas inside the reactor 4, utilizes its hydrophilic properties to absorb water vapor in the internal water vapor ducts. The rotation of the impeller 14 generates a slight negative pressure within the negative pressure pipe 13 and the water vapor circulation pipe 8. Under the action of the negative pressure, the water vapor absorbed by the water absorption disc 9 is collected in the water vapor circulation pipe 8 and then drawn out of the reactor 4 through the negative pressure pipe 13.

[0037] Example 2: Based on Example 1, the reactor 4 is provided with an energy supply device to provide energy for the rotation of the wind wheel 14.

[0038] The energy supply device is composed of a solar panel 16 and a photovoltaic cell 17 , which generates electricity by solar energy and stores the electricity in the photovoltaic cell 17 to supply power to the micro motor 15 , which drives the wind wheel 14 to rotate.

[0039] When the reactor 4 stops rotating, the energy supply device composed of the solar panel 16 and the photovoltaic cell 17 acts as an auxiliary energy source to drive the micro motor 15 to rotate the wind wheel 14, thereby maintaining a slightly negative pressure state in the negative pressure pipe 13.

[0040] The sludge treated in the experiment was municipal sludge with a moisture content of about 80%. The auxiliary material was sawdust. The bacterial agent used was a homemade bacterial agent made in our laboratory. The following three experimental groups were set up:

[0041] (1) CK control group: 75 kg of fresh dehydrated sludge (water content of about 80%) was taken and mixed evenly with 25 kg of sawdust. 1 kg of homemade bacterial agent was added and added to the reactor after mixing. The initial material moisture content was controlled at 60%-65%. Intermittent aeration (open 10 min / close 20 min) was used for aeration (air volume was set to 40 L / min).

[0042] (2) T-1: Reference Figure 2 15 sets of water vapor removal devices were installed on the reactor, and the other control parameters were set the same as those of the CK control group;

[0043] (3) T-2: During the high temperature period of the sludge biological drying process, the aeration volume was increased by two times, and the other control parameters were set the same as the CK control group.

[0044] Compared with the CK control group which did not install the water vapor removal device, the T-1 group installed the water vapor removal device. Although the temperature during the high temperature period (60-75℃) remained basically unchanged, the duration was extended by about 12 hours compared with the CK group (3 days). After the sludge was biologically dried, the sludge moisture content of the CK group decreased to 52.3%, while the sludge moisture content of the T-1 group decreased to 39.1%; compared with the CK group, the temperature during the high temperature period of the T-2 group dropped to 60-65℃, the duration could only reach 1.5 days, and the sludge moisture content decreased to 46.8%.

[0045] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for removing moisture from a sludge biological drying reactor, comprising a reactor, an air inlet pipe and an air outlet pipe provided at the end of the reactor, the air inlet pipe being connected to a Roots blower, an aeration pipe provided within the reactor, the air inlet pipe being connected to the end of the aeration pipe and being in communication therewith, the Roots blower conveying external air into the aeration pipe to generate aeration, and characterized by: The reactor is provided with a water vapor removal device; The water vapor removal device includes a water vapor circulation pipe, which is fixedly arranged on the reactor, one end of which extends into the reactor to connect to the water absorption plate, and the other end extends out of the reactor; The interior of the water absorption tray has a thin arc-shaped space and is distributed with micro water vapor channels. The water absorption tray is tightly connected to the inner wall of the reactor, and the back is integrally connected to the water vapor circulation pipe. The other end of the water vapor circulation pipe is connected to and communicates with the negative pressure pipe. The negative pressure pipe wraps the outer opening of the water vapor circulation pipe. The bottom of the pipe is fixed to the outer wall of the reactor and is tightly sealed. A wind wheel is provided at the pipe opening of the negative pressure pipe, and an energy supply device is provided on the reactor to provide energy for the rotation of the wind wheel.

2. The device for removing water vapor from a sludge biological drying reactor according to claim 1, characterized in that: The reactor is fixed with a gear-type ring gear, which is engaged with the driving gear. The air inlet pipe extends into the reactor and is connected to a movable adapter. The movable adapter is provided with an annular groove, and an air hole is provided in the annular groove. A collar is sleeved on the annular groove, and an air channel is provided in the collar to communicate with the air hole. The collar is provided with a connecting pipe to communicate with the end of the aeration pipe.

3. The device for removing water vapor from a sludge biological drying reactor according to claim 1, characterized in that: The energy supply device is composed of a solar power generation panel and a photovoltaic cell. It generates electricity by relying on solar energy, stores the electricity in the photovoltaic cell, supplies power to the micro motor, and the micro motor drives the wind wheel to rotate.

4. The device for removing water vapor inside a sludge biological drying reactor according to any one of claims 1 to 3, characterized in that: The method of use is that the water absorption disc comes into contact with the high-humidity gas inside the cylinder to absorb water vapor in the water absorption disc, and at the same time uses the energy of the rotation of the cylinder to drive the wind wheel. When the wind wheel rotates, it will form a slight negative pressure in the negative pressure pipe and the water vapor circulation pipe. The tiny water droplets formed by the liquefaction of water vapor in the water absorption disc are gathered in the water vapor circulation pipe under the action of negative pressure and are drawn out of the cylinder through the negative pressure pipe.

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