Hot air circulating system
By using the condensation and heating components of the hot air circulation system, the problems of hot air corrosion and energy waste in the sludge drying device are solved, achieving a highly efficient and energy-saving sludge drying effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-04-07
AI Technical Summary
In existing sludge drying equipment, the contact between hot air and the inner wall of the drying chamber causes corrosion, and excess heat energy is not recovered and utilized, resulting in energy waste.
A hot air circulation system is adopted, including a drying chamber, circulation components, a condenser section and a heating section. The condenser removes moisture from the hot air and returns it to the drying chamber, while the heating section keeps the hot air dry and recycles the heat energy.
It effectively prevents rust on the inner wall of the drying chamber, saves energy, and improves the efficiency and effectiveness of sludge drying.
Smart Images
Figure CN224091769U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a sludge treatment equipment field especially relates to a hot air circulation system. BACKGROUND
[0002] The general sludge treatment step is after the primary dewatering of sludge, sends into the drying device and dries, to remove water further and reduce the volume of sludge and facilitate subsequent transportation and processing. The general sludge drying is all with hot air drying. That is, sludge is sent to the drying box and dried, and the drying box is full of hot air. The hot air retained in the interior is stored with water vapor, so if it is in contact with the inner wall of the drying box for a long time, it is easy to accelerate the corrosion of the drying box, and the heat energy of the excess hot air is not recycled, causing waste. SUMMARY
[0003] In order to overcome the deficiencies of the prior art, the utility model provides a hot air circulation system.
[0004] The utility model discloses the following technical scheme is realized: a hot air circulation system, including drying box and circulating assembly, the drying box is opened and is drawn into the feed port, the sidewall of drying box is opened and is drawn into the air inlet, the end of drying box is opened and is drawn into the air outlet, the import of circulating assembly is drawn into the air outlet with first air pipe intercommunication, the export of circulating assembly is drawn into the air inlet with second air pipe intercommunication,
[0005] The circulating assembly includes a condensing portion and a warming portion, and the air flow drawn out of the air outlet flows through the condensing portion and the warming portion in sequence.
[0006] The condensing portion includes a plurality of condensing tubes and a cooling member, air passages are provided between the plurality of condensing tubes for air to pass through, the air passages are arranged along the flow direction of the air flow, a plurality of guide grooves are formed in the inner wall of the air passages, guide holes are formed in the groove bottoms of the guide grooves, the guide holes are in communication with the cooling member, and the cooling member is in communication with the condensing tubes to pump cooling water into the condensing tubes.
[0007] The cooling member includes a water tank, a water pump is arranged in the water tank, one end of the condensing tube is in communication with the water tank, and the other end of the condensing tube is in communication with the water pump, and the guide holes are in communication with the water tank through a hose.
[0008] The warming portion includes a plurality of heating tubes and a box body, the heating tubes are arranged in the box body, and air passages are formed between the plurality of heating tubes for the air flow to flow through, and the air flow is heated by the heating tubes when flowing through the air passages.
[0009] The first air pipe is provided with a dust removal part between the first air pipe and the condensing part, the dust removal part comprises a shell, a dust removal box is arranged in the shell, the first air pipe is inserted into the shell and extends into the dust removal box below the water surface, and the shell is communicated with the condensing part.
[0010] The side wall of the air inlet is fixed with a heating part, the air inlet of the heating part is towards the second air pipe, the air outlet of the heating part is towards the drying box, the inner wall of the air inlet is provided with a pair of gratings, the gratings are fixed on the inner wall of the drying box, and the heating part is arranged between the pair of gratings.
[0011] The heating part comprises a heating pipe, the heating pipe is evenly distributed on the inner wall of the air inlet in an S shape and covers the air outlet, and the pair of gratings are arranged on the two sides of the heating pipe.
[0012] Compared with the prior art, the air in the drying box is heated by the heating part, and the sludge can be transported for dehydration and drying after the temperature in the drying box reaches the required temperature. With the continuous drying process, the high-temperature air in the drying box carries the dust formed by the moisture and a small amount of sludge particles, and at this time, the circulating assembly can be purified and the air in the drying box can be dehydrated to keep the air blowing in the drying box dry. The hot air with moisture in the drying box is sucked back into the circulating assembly to remove the moisture therein and is sent back to the drying box. Since the hot air is sucked from the drying box, the temperature difference is small, the reheating time is short, and energy is saved. At the same time, the moisture is removed in the circulating assembly, so that the hot air in the drying box is always dry, the drying effect of the drying box for drying sludge is good, and the efficiency is high. BRIEF DESCRIPTION OF DRAWINGS
[0013] Fig. 1 is a structural schematic view of the hot air circulation system in the utility model;
[0014] Fig. 2 is a schematic view of the internal structure of the dust removal part of the hot air circulation system;
[0015] Fig. 3 is a schematic view of the internal structure of the condensing part of the hot air circulation system;
[0016] Fig. 4 is a schematic view of the internal structure of the heating part of the hot air circulation system;
[0017] Fig. 5 is a schematic view of the internal structure of the heating part of the hot air circulation system;
[0018] In the figure: 1, drying box; 11, feeding port; 12, air inlet; 13, air outlet; 14, first air pipe; 15, second air pipe; 2, circulating assembly; 21, condensing part; 211, condensing pipe; 212, water tank; 213, water pump; 214, flow guide hole; 22, warming part; 221, heating pipe; 222, box body; 223, air duct; 23, dust removal part; 231, shell; 232, dust removal box; 24, heating part; 241, grid; 242, warming pipe. DETAILED DESCRIPTION
[0019] The utility model will be described further, combining the drawings and specific implementation, it is to be explained that, under the premise of not conflicting, the following described each embodiment or each technical feature between can be combined to form new embodiment.
[0020] Referring to figures 1-5, a hot air circulation system, including drying box 1 and circulating assembly 2, drying box 1 is set up feeding port 11, the side wall of drying box 1 is set up air inlet 12, the end of drying box 1 is set up air outlet 13, the inlet of circulating assembly 2 is communicated with air outlet 13 by first air pipe 14, the outlet of circulating assembly 2 is communicated with air inlet 12 by second air pipe 15. When the hot air circulation system is applied in drying box 1 for drying sludge, the hot air with moisture in drying box 1 is extracted back to circulating assembly 2 to remove moisture therein and is sent back to drying box 1, because the hot air sent back is extracted from drying box 1, therefore the temperature difference with drying box 1 is small, re-heating time is short, energy is saved. At the same time, moisture is removed in circulating assembly 2, therefore the hot air in drying form is always dry, the drying effect for drying sludge is good, and the efficiency is high.
[0021] In the embodiment, circulating assembly 2 includes condensing part 21 and warming part 22. Warming part 22 is used to make up the temperature drop of hot air, or to heat the hot air once, so that the hot air is sent back to drying box 1 close to the temperature in drying box 1. The air flow extracted by air outlet 13 flows through condensing part 21 and warming part 22 in turn. Even if there is a temperature difference between the hot air extracted back to circulating assembly 2 and the air in drying box 1, warming part 22 can heat the air in circulating assembly 2 flowing to drying box 1, so that the hot air sent back can be the same as the temperature in drying box 1, to maintain the temperature in drying box 1 and ensure the drying effect.
[0022] The preferred embodiment of the condensing part 21 and the warming part 22 is provided in the present embodiment. Specifically, the condensing part 21 comprises a plurality of condensing pipes 211 and a cooling member, air passages are arranged between the plurality of condensing pipes 211 for air to pass through, the air passages are arranged along the air flow direction, a plurality of guide grooves are arranged on the inner wall of the air passages, the bottom of the guide grooves is provided with guide holes 214, the guide holes 214 are communicated with the cooling member, the cooling member is communicated with the condensing pipes 211 to pump cooling water into the condensing pipes 211. The preferred embodiment of the cooling member in the present embodiment is that the cooling member comprises a water tank 212, the water tank 212 is provided with a water pump 213, the end of the condensing pipe 211 is communicated with the water tank 212 and one end of the condensing pipe 211 is communicated with the water pump 213, and the guide holes 214 are communicated with the water tank 212 through a hose. The warming part 22 in the present embodiment comprises a plurality of heating pipes 221 and a box body 222, the heating pipes 221 are arranged in the box body 222, air passages 223 are formed between the plurality of heating pipes 221 for air to flow through, and the air is heated by the heating pipes 221 when flowing through the air passages 223. The condensing water can flow back into the water tank 212.
[0023] On the basis of the above-mentioned embodiment, a dust removal part 23 can be arranged between the first air pipe 14 and the condensing part 21, the dust removal part 23 comprises a shell 231, the shell 231 is provided with a dust removal tank 232, the first air pipe 14 is inserted into the shell 231 and extends into the dust removal tank 232 below the water surface, and the shell 231 is communicated with the condensing part 21. The heating part 24 is fixed on the side wall of the air inlet 12, the air inlet direction of the heating part 24 faces the second air pipe 15, the air outlet direction of the heating part 24 faces the drying box 1, and a pair of gratings 241 are arranged on the inner wall of the air inlet 12 and fixed on the inner wall of the air inlet 12 to make the air inlet more uniform. The heating part 24 is fixed on the inner wall of the air inlet 12 and arranged between the pair of gratings 241, so that the air entering the heating part 24 is more uniform and the hot air entering the drying box 1 is more uniform.
[0024] The heating part 24 in the present embodiment comprises a warming pipe 242, the warming pipe 242 is arranged in an S shape on the inner wall of the air inlet 12 and covers the air outlet, and the pair of gratings 241 are arranged on the two sides of the warming pipe 242. The heating part 24 and the warming part 22 are used together to heat the returned hot air, so that the temperature in the box body 222 is always maintained within a reasonable range, thereby ensuring the efficiency of sludge drying.
[0025] Compared with the prior art, the utility model discloses in using first, through heating unit 24 heating the air in drying -out cabinet 1, can start conveying sludge to carry out dehydration and drying after the temperature in drying -out cabinet 1 reaches the required temperature, with the continuation of drying process, the dust of the moisture and the small amount of sludge particle that high -temperature air in drying -out cabinet 1 has formed, the circulating assembly 2 can carry out purification and the dehydration of the air in drying -out cabinet 1 at this time, to keep the blowing of drying -out cabinet 1 always dry, the hot air with moisture in drying -out cabinet 1 is extracted back to circulating assembly 2 to remove the moisture in it and is sent back to drying -out cabinet 1, because the hot air of sending back is extracted from drying -out cabinet 1, thus with the temperature difference of drying -out cabinet 1 is small, re -heating time -saving and energy -conserving. Simultaneously by the moisture in circulating assembly 2 is removed, thus make the hot air in drying -out shape always dry, and the drying effect is good for drying sludge, and the efficiency is high.
[0026] The above embodiment is only the preferred embodiment of the utility model, and cannot be used to limit the range of the utility model protection, and any non -substantial change and replacement of the person skilled in the art on the basis of the utility model all belong to the range of the utility model claimed protection.
Claims
1. A hot air circulation system, comprising a drying chamber and a circulation assembly, characterized in that: The drying box has a feed inlet, an air inlet on the side wall of the drying box, and an exhaust port at the end of the drying box. The inlet of the circulation component is connected to the exhaust port through a first air duct, and the outlet of the circulation component is connected to the air inlet through a second air duct. The circulation component includes a condenser section and a heating section, and the airflow drawn out by the exhaust port flows sequentially through the condenser section and the heating section.
2. The hot air circulation system according to claim 1, characterized in that: The condensation section includes several condenser tubes and cooling components. Air ducts are provided between the several condenser tubes for air to pass through. The air ducts are arranged along the airflow direction. Several guide grooves are opened on the inner wall of the air ducts. Guide holes are opened at the bottom of the guide grooves. The guide holes are connected to the cooling components. The cooling components are connected to the condenser tubes and pump cooling water into the condenser tubes.
3. A hot air circulation system according to claim 2, characterized in that: The cooling component includes a water tank, a water pump is installed inside the water tank, one end of the condenser tube is connected to the water tank and one end of the condenser tube is connected to the water pump, and the guide hole is connected to the water tank through a flexible hose.
4. A hot air circulation system according to claim 1, characterized in that: The heating section includes several heating tubes and a housing. The heating tubes are disposed in the housing, and an air passage is formed between the heating tubes for airflow. When the air flows through the air passage, it is heated by the heating tubes.
5. A hot air circulation system according to claim 1, characterized in that: A dust removal section is provided between the first air duct and the condenser section. The dust removal section includes a housing and a dust removal box inside the housing. The first air duct is inserted into the housing and extends into the dust removal box, which is placed below the water surface. The housing is connected to the condenser section.
6. A hot air circulation system according to claim 1, characterized in that: A heating element is fixed on the side wall of the air inlet. The air inlet of the heating element faces the second air duct, and the air outlet of the heating element faces the drying box. A pair of grilles are provided on the inner wall of the air inlet. The grilles are fixed on the inner wall of the drying box, and the heating element is located between the pair of grilles.
7. A hot air circulation system according to claim 6, characterized in that: The heating element includes heating pipes, which are S-shaped and evenly distributed on the inner wall of the air inlet and cover the air outlet. A pair of grilles are placed on both sides of the heating pipes.