Low-temperature efficient sludge drying process and device
阅读说明：本技术 一种低温高效污泥烘干工艺及装置 (Low-temperature efficient sludge drying process and device ) 是由 汤水根 于 2019-09-09 设计创作，主要内容包括：本发明公开了一种低温高效污泥烘干工艺及装置,涉及污泥烘干技术领域,包括以下步骤,送入污泥；低温烘干；热风循环；成品处理,包括热风机,所述热风机的出风口连通有混合箱,所述混合箱的出风口连通有烘干箱,该低温高效污泥烘干工艺及装置,能够提高污泥的烘干程度,避免现有的污泥处理工艺处理后的污泥含水量高不方便后续污泥的处理的问题,降低了工艺的能源损耗,能够避免污泥烘干过程中产生的有毒有害气体扩散到外部的问题,解决了现有的烘干工艺的适应性较差,只能适用于成分较为简单的污泥的问题,同时接近自然干燥,更符合环保卫生要求,更适应河道淤泥清理等环境治理工作,能够产生有益微生物调高河道水质。(The invention discloses a low-temperature high-efficiency sludge drying process and a device, which relate to the technical field of sludge drying and comprise the following steps of feeding sludge; drying at low temperature; circulating hot air; finished product processing, including the air heater, the air outlet intercommunication of air heater has the mixing box, the air outlet intercommunication of mixing box has the stoving case, this high-efficient mud stoving technology of low temperature and device, can improve the stoving degree of mud, avoid the problem of the processing of the high inconvenient follow-up mud of water content behind the current sludge treatment technology processing, the energy resource loss of technology has been reduced, can avoid the poisonous and harmful gas diffusion outside problem that produces among the mud stoving process, it is relatively poor to have solved the adaptability of current stoving technology, can only be applicable to the problem of the comparatively simple mud of composition, be close natural drying simultaneously, more accord with environmental protection health requirement, more adapt to environmental management work such as river silt clearance, can produce beneficial microorganism and increase river course quality of water.)
1. A low-temperature high-efficiency sludge drying process is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
(1) feeding sludge, pumping the sludge into a drying box through a sludge pump, and carrying out primary solid-liquid separation on the sludge in the drying box by using a plate frame machine;
(2) low-temperature drying, wherein external air is extracted and heated by a hot air blower and then is sent into a mixing box, the external air and the fed circulating gas are mixed and heated in the mixing box and then are sent into a drying box, and sludge in the drying box is dried and then enters a circulating pipe;
(3) hot air in the circulating pipe is shunted by an internal shunting device and then respectively enters an air inlet of the air heater and the mixing box, the part entering the air inlet of the air heater is reheated and then is sent into the mixing box, and is mixed with the part in the circulating pipe which is directly sent into the mixing box for heating and then is sent into the drying box again;
(4) and (4) treating a finished product, discharging sewage in the drying box from a drain pipe at the bottom, opening a material taking door on the side surface of the drying box, and taking the dried sludge out of the material taking door.
2. The low-temperature high-efficiency sludge drying process according to claim 1, characterized in that: the air temperature after the air heater is heated is 60 ℃, and the air temperature after the air heater is heated in the mixing box and then sent into the drying box is 30-50 ℃.
3. The low-temperature high-efficiency sludge drying process according to claim 1, characterized in that: 60-80% of the gas in the circulating pipe enters the hot air blower to be reheated after being shunted by the shunting device, and the rest part of the gas enters the mixing box.
4. The low-temperature high-efficiency sludge drying process according to claim 1, characterized in that: and pumping sludge into the drying box, then closing the drying box, and introducing inert gas into the drying box until the pressure inside the drying box is 2-5 times of atmospheric pressure.
5. The low-temperature high-efficiency sludge drying process according to claim 1, characterized in that: and weighing the sludge before and after drying, and when the weight of the dried sludge is more than 25% of the weight of the dried sludge, sending the sludge into a drying box for secondary drying.
6. The low-temperature high-efficiency sludge drying device comprises a hot air blower (1) and is characterized in that: the air outlet intercommunication of air heater (1) has mixing box (2), the air outlet intercommunication of mixing box (2) has stoving case (3), the internally mounted of stoving case (3) has sheet frame machine (4) and sludge pump (5), the one side intercommunication that mixing box (2) were kept away from in stoving case (3) has circulating pipe (6), direct current pipe (7) and mixing box intercommunication are passed through to the bottom of circulating pipe (6), the air intake intercommunication of one side through secondary pipe (8) and air heater (1) of circulating pipe (6), diverging device (9) are installed to the inside one end that is close to direct current pipe (7) and secondary pipe (8) of circulating pipe (6).
7. The low-temperature high-efficiency sludge drying device according to claim 6, characterized in that: diverging device (9) are including hang plate (10), hang plate (10) fixed mounting is located the position between direct current pipe (7) and secondary pipe (8) at the inner wall of circulating pipe (6), the one end rotation that circulating pipe (6) inner wall was kept away from in hang plate (10) is connected with rotor plate (11), one side that inclined plate (10) were kept away from in rotor plate (11) and the inner wall sliding connection of circulating pipe (6).
8. The low-temperature high-efficiency sludge drying device according to claim 6, characterized in that: the drying oven is characterized in that a motor (12) is installed at one end, far away from the drying oven (3), of the circulating pipe (6), and the output end of the motor (12) penetrates into the circulating pipe (6) and is in transmission connection with a rotating shaft of the rotating plate (11).
9. The low-temperature high-efficiency sludge drying device according to claim 6, characterized in that: the bottom intercommunication of stoving case (3) has drain pipe (13), valve (14) are installed to the one end that drain pipe (13) are close to stoving case (3).
10. The low-temperature high-efficiency sludge drying device according to claim 6, characterized in that: a discharge port (15) is formed in one side of the drying box (3), and a bin door (16) is rotatably connected to one side of the inner wall of the discharge port (15).
Technical Field
The invention relates to the technical field of sludge drying, in particular to a low-temperature efficient sludge drying process and device.
Background
Sludge drying is an intermediate process necessary for sludge treatment, from direct application to direct incineration, from application after drying, to incineration after drying, until recent drying and gasification, and basically confirms the importance of drying as a necessary intermediate process, and the reasons are mainly two: economy, whether transportation and disposal are reduced or energy consumption is reduced; sanitation and agricultural necessary conditions, at present, sludge dewatering in most industries only adopts mechanical extrusion type sludge dewatering, such as a belt filter press, a plate and frame filter press, a screw stacking machine and a centrifugal dehydrator, and the water content of the dewatered sludge is about 70-90%. However, the water content of the sludge treated by the existing sludge treatment process is high, so that the subsequent sludge treatment is inconvenient, the problem that toxic and harmful gases generated in the sludge drying process are diffused to the outside cannot be effectively solved, the environment is not protected, the drying process has poor adaptability, the sludge treatment process can only be suitable for sludge with simple components, and the energy consumption is high by adopting the drying process.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a low-temperature high-efficiency sludge drying process and a device, which solve the problems that the water content of sludge treated by the existing sludge treatment process is high, the subsequent sludge treatment is inconvenient, the toxic and harmful gas generated in the sludge drying process cannot be effectively diffused to the outside, the environment is not protected, the drying process has poor adaptability, the process can only be suitable for sludge with simple components, and the energy consumption of the drying process is high.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a low-temperature high-efficiency sludge drying process, which comprises the following steps,
(1) feeding sludge, pumping the sludge into a drying box through a sludge pump, and carrying out primary solid-liquid separation on the sludge in the drying box by using a plate frame machine;
(2) low-temperature drying, wherein external air is extracted and heated by a hot air blower and then is sent into a mixing box, the external air and the fed circulating gas are mixed and heated in the mixing box and then are sent into a drying box, and sludge in the drying box is dried and then enters a circulating pipe;
(3) hot air in the circulating pipe is shunted by an internal shunting device and then respectively enters an air inlet of the air heater and the mixing box, the part entering the air inlet of the air heater is reheated and then is sent into the mixing box, and is mixed with the part in the circulating pipe which is directly sent into the mixing box for heating and then is sent into the drying box again;
(4) and (4) treating a finished product, discharging sewage in the drying box from a drain pipe at the bottom, opening a material taking door on the side surface of the drying box, and taking the dried sludge out of the material taking door.
Preferably, the air temperature heated by the air heater is 60 ℃, and the air temperature fed into the drying box after being mixed and heated by the mixing box is 30-50 ℃.
Preferably, 60-80% of the gas in the circulating pipe enters the hot air blower for reheating after being divided by the dividing device, and the rest part of the gas enters the mixing box.
Preferably, the drying box is closed after sludge is pumped into the drying box, and then inert gas is introduced into the drying box until the pressure inside the drying box is 2-5 times of atmospheric pressure.
Preferably, the sludge is weighed before and after being dried, and when the weight of the dried sludge is more than 25% of the weight of the dried sludge, the sludge is sent into a drying box for secondary drying.
Preferably, a high-efficient sludge drying device of low temperature, including the air heater, the air outlet intercommunication of air heater has the mixing box, the air outlet intercommunication of mixing box has the stoving case, the internally mounted of stoving case has sheet frame machine and sludge pump, the one side intercommunication that the mixing box was kept away from to the stoving case has the circulating pipe, direct current pipe and mixing box intercommunication are passed through to the bottom of circulating pipe, the air intake intercommunication of secondary pipe and air heater is passed through to one side of circulating pipe, diverging device is installed to the one end that the inside of circulating pipe is close to direct current pipe and secondary pipe.
Preferably, the flow dividing device comprises an inclined plate, the inclined plate is fixedly installed on the inner wall of the circulating pipe at a position between the direct current pipe and the secondary pipe, one end, far away from the inner wall of the circulating pipe, of the inclined plate is rotatably connected with a rotating plate, and one side, far away from the inclined plate, of the rotating plate is connected with the inner wall of the circulating pipe in a sliding mode.
Preferably, a motor is installed at one end of the circulating pipe, which is far away from the drying box, and the output end of the motor penetrates into the circulating pipe and is in transmission connection with the rotating shaft of the rotating plate.
Preferably, the bottom of the drying box is communicated with a drain pipe, and a valve is installed at one end, close to the drying box, of the drain pipe.
Preferably, a discharge port is formed in one side of the drying box, and a bin door is rotatably connected to one side of the inner wall of the discharge port.
(III) advantageous effects
The invention provides a low-temperature high-efficiency sludge drying process and a device. The method has the following beneficial effects:
(1) this high-efficient mud stoving technology of low temperature and device, in sending into the drying oven through passing through the mud pump with mud, use the sheet frame machine to carry out preliminary solid-liquid separation with the mud of stoving incasement, outside air is sent into the mixing box after being extracted and heated by the air heater, in the mixing box with the circulating gas who sends into mix the heat after being sent into the stoving case, the mud to the stoving incasement is dried, pass through mechanical extrusion and the dual means of low temperature drying with mud, can improve the stoving degree of mud, the problem of the processing of the inconvenient follow-up mud of mud moisture content height after avoiding current sludge treatment process to handle.
(2) The low-temperature high-efficiency sludge drying process and the device thereof, the external air is pumped and heated by the air heater and then is sent into the mixing box, the air is mixed with the sent circulating gas in the mixing box and then is sent into the drying box, the sludge in the drying box is dried and then enters the circulating pipe, the hot air in the circulating pipe is shunted by the internal shunting device and then respectively enters the air inlet of the air heater and the mixing box, the part entering the air inlet of the air heater is reheated and then is sent into the mixing box, the hot air is mixed with the part directly sent into the mixing box in the circulating pipe and then is sent into the drying box again, the hot air dries the sludge and then is recycled through the circulating pipe, the loss of heat energy in the air can be avoided, the energy loss of the process is reduced, meanwhile, the waste gas is recycled, the problem that toxic and harmful gas generated in the sludge drying process is diffused to the outside can be avoided, and, the sludge drying device can only be suitable for the problem of sludge with simpler components, the drying temperature of the air heater is 30-50 ℃, the drying is close to natural drying, the sludge is thoroughly dried, the moisture content is low, the pollution is avoided, the environment-friendly and sanitary requirements are better met, the sludge drying device is more suitable for environment treatment work such as river sludge cleaning, and beneficial microorganisms can be generated to improve the river water quality.
Drawings
FIG. 1 is a schematic view of the apparatus of the present invention;
FIG. 2 is a schematic view of the internal structure of the drying box according to the present invention;
fig. 3 is a schematic structural diagram of the shunt device of the present invention.
In the figure: 1-hot air blower, 2-mixing box, 3-drying box, 4-plate frame machine, 5-sludge pump, 6-circulating pipe, 7-straight flow pipe, 8-secondary pipe, 9-shunt device, 10-inclined plate, 11-rotating plate, 12-motor, 13-drain pipe, 14-valve, 15-discharge hole and 16-bin gate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: a low-temperature high-efficiency sludge drying process, which comprises the following steps,
(1) feeding sludge, pumping the sludge into a drying box through a sludge pump, and carrying out primary solid-liquid separation on the sludge in the drying box by using a plate frame machine;
(2) low-temperature drying, wherein external air is extracted and heated by a hot air blower and then is sent into a mixing box, the external air and the fed circulating gas are mixed and heated in the mixing box and then are sent into a drying box, and sludge in the drying box is dried and then enters a circulating pipe;
the sludge is subjected to mechanical extrusion and low-temperature drying, so that the drying degree of the sludge can be improved, and the problem that the sludge treated by the conventional sludge treatment process has high water content and is inconvenient for subsequent sludge treatment is solved.
(3) Hot air in the circulating pipe is shunted by an internal shunting device and then respectively enters an air inlet of the air heater and the mixing box, the part entering the air inlet of the air heater is reheated and then is sent into the mixing box, and is mixed with the part in the circulating pipe which is directly sent into the mixing box for heating and then is sent into the drying box again;
the hot air is recycled through the circulating pipe after drying the sludge, so that the loss of heat energy in the air can be avoided, the energy loss of the process is reduced, meanwhile, the waste gas is recycled, the problem that toxic and harmful gas generated in the sludge drying process is diffused to the outside can be avoided, and the problem that the existing drying process is poor in adaptability and only can be applied to sludge with simpler components is solved.
(4) And (4) treating a finished product, discharging sewage in the drying box from a drain pipe at the bottom, opening a material taking door on the side surface of the drying box, and taking the dried sludge out of the material taking door.
The air temperature after the heating of the air heater is 60 ℃, and the air temperature after the air is mixed and heated by the mixing box and then sent into the drying box is 50 ℃.
80% of the gas in the circulating pipe enters the hot air blower to be reheated after being shunted by the shunting device, and the rest part of the gas enters the mixing box.
And (3) pumping sludge into the drying box, then closing the drying box, and introducing inert gas into the drying box until the pressure inside the drying box is 2 times of atmospheric pressure.
And weighing the sludge before and after drying, and when the weight of the sludge after drying treatment is more than 25% of the weight of the sludge before drying, sending the sludge into a drying box for secondary drying.
The utility model provides a high-efficient sludge drying device of low temperature, including air heater 1, the air outlet intercommunication of air heater 1 has mixing box 2, the air outlet intercommunication of mixing box 2 has stoving
The flow dividing device 9 comprises an inclined plate 10, the inclined plate 10 is fixedly installed on the inner wall of the circulating
And a motor 12 is arranged at one end of the circulating
The bottom of the
A
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.