CN112876016A - Drying treatment system and method for high-viscosity sludge - Google Patents
Drying treatment system and method for high-viscosity sludge Download PDFInfo
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- CN112876016A CN112876016A CN202110108150.4A CN202110108150A CN112876016A CN 112876016 A CN112876016 A CN 112876016A CN 202110108150 A CN202110108150 A CN 202110108150A CN 112876016 A CN112876016 A CN 112876016A
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- 239000010802 sludge Substances 0.000 title claims abstract description 139
- 238000001035 drying Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000007599 discharging Methods 0.000 claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000009826 distribution Methods 0.000 claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 7
- 239000010865 sewage Substances 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 17
- 239000000498 cooling water Substances 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 9
- 239000012535 impurity Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 239000008236 heating water Substances 0.000 claims description 5
- 239000002918 waste heat Substances 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 230000014759 maintenance of location Effects 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 239000008187 granular material Substances 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 abstract description 3
- 230000008020 evaporation Effects 0.000 abstract description 3
- 239000003570 air Substances 0.000 description 72
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
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- 238000004519 manufacturing process Methods 0.000 description 2
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- 241000282414 Homo sapiens Species 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
Abstract
The invention discloses a drying treatment system and method for high-viscosity sludge, wherein the system comprises a feeding conveyor, a forming machine, a dryer, a discharging conveyor, a circulating fan, a condenser, a heater and a filter, wherein the input end of the feeding conveyor is provided with a wet sludge inlet, the other end of the feeding conveyor is provided with a wet sludge outlet, and the wet sludge outlet is communicated with a first feeding hole at the input end of the forming machine. The invention carries out forming treatment on the sludge through the forming machine, and carries out drying treatment on the formed wet sludge through the spiral mesh belt conveyor in the drying machine, in the drying treatment process, the wet sludge is fully contacted with the drying hot air flow introduced into the air distribution holes on the surface of the air distribution pipe, the contact area of the dispersed and formed wet sludge is increased, and the drying speed and the drying efficiency for the high-viscosity sludge are high, the drying efficiency is high, the evaporation speed of the water in the sludge is high, and the drying speed and the drying efficiency are increased.
Description
Technical Field
The invention belongs to the technical field of energy conservation and environmental protection, and particularly relates to a drying treatment system and method for high-viscosity sludge.
Background
Along with the development of modern industry and the acceleration of urbanization process, the awareness of human beings on environmental protection is continuously strengthened. In recent years, the amount of sludge produced by industrial production and municipal sewage treatment has increased year by year, and the sludge may contain heavy metals or pathogens, which poses a great safety hazard to the environment. The sludge drying has profound significance as an important way for sludge reduction and resource treatment. Due to the complex and various sewage components from different sources and different sewage treatment processes, the properties of the generated sludge have very large differences. Compared with municipal sludge, the problems of high industrial sludge viscosity, large heat transfer resistance, difficult dehydration and the like are a technical difficulty of the sludge drying process. The traditional sludge drying system has high energy consumption, low thermal efficiency and high production and operation cost, and is not beneficial to energy conservation, emission reduction and large-scale popularization.
Therefore, it is necessary to develop a drying treatment system and method for high viscosity sludge to solve the above problems.
Disclosure of Invention
In view of the above problems, the present invention provides a system and a method for drying and treating high viscosity sludge, so as to solve the problems mentioned in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a high-viscosity sludge drying treatment system comprises a feeding conveyor, a forming machine, a drying machine, a discharging conveyor, a circulating fan, a condenser, a heater and a filter, wherein the input end of the feeding conveyor is provided with a wet sludge inlet, the other end of the feeding conveyor is provided with a wet sludge outlet, and the wet sludge outlet is communicated with a first feeding hole at the input end of the forming machine;
a first discharge hole at the output end of the forming machine is connected with a second feed hole at the input end of the dryer, and the first discharge hole of the forming machine is communicated with the inside of the dryer;
the second feed port of the input end of the dryer is communicated with the first feed port of the output end of the forming machine, the second feed port of the output end of the dryer is connected with the third feed port of the input end of the discharging conveyor, a spiral mesh belt conveyor is arranged inside the dryer, a first air inlet is arranged at the bottom of the dryer, an air distribution pipe is further arranged inside the dryer, a plurality of air distribution holes are formed in the surface of the air distribution pipe, the first air inlet is connected with the air distribution pipe, a first air outlet is formed in the top of the dryer, and the first air outlet is communicated with the second air inlet of the input end of the circulating fan;
the output end of the discharging conveyor is provided with a third discharging hole;
a second air outlet at the output end of the circulating fan is communicated with a third air inlet at the input end of the condenser;
a third air outlet of the condenser is communicated with a fourth air inlet at the input end of the heater, the condenser is connected with an outer pipe through circulating cooling water upper water and circulating cooling water return water, a first sewage discharge outlet at one side of the bottom of the condenser is communicated with a second sewage discharge outlet at one side of the filter and is communicated with a sewage pipe network of a whole plant, and a condensate liquid outlet at the bottom of the condenser is connected with a water inlet at the top of the filter;
a fourth air outlet at the output end of the heater is communicated with a first air inlet at the input end of the bottom of the dryer, and the heater is also communicated with a steam condensate inlet at the bottom of the feeding conveyor;
and a water outlet at the bottom of the filter is communicated with a heating water inlet at the bottom of the feeding conveyor.
Furthermore, the surface of the feeding conveyor is sleeved with two sections of heating jackets for preheating and heating wet sludge pieces inside the feeding conveyor, the feeding conveyor conveys wet sludge through a tube side, and the shell side of the feeding conveyor is respectively communicated with the heater and the filter through a steam condensate inlet and a heating water inlet through pipelines.
Furthermore, the surface of the discharging conveyor is sleeved with a cooling jacket for cooling the dried sludge in the discharging conveyor, and a liquid inlet at the bottom of the discharging conveyor is communicated with a steam condensate outlet at the top of the feeding conveyor.
Further, the heater adopts one of steam heating, electric heating or other heat source heating.
The invention also provides a drying treatment method for the high-viscosity sludge, which adopts the drying treatment system for the high-viscosity sludge and comprises the following steps:
s1: the outer pipe utilizes the circulating cooling water to introduce circulating cooling water for cooling into the condenser;
s2: starting a circulating fan, and stabilizing the internal pressure of each part of the whole sludge drying treatment system through the circulating fan;
s3: a third air outlet of the condenser introduces steam into the heater through a fourth air inlet, the heater heats the steam inside, and steam condensate is input into the feeding conveyor through a steam condensate inlet;
s4: starting the discharging conveyor until the discharging spiral in the discharging conveyor works stably;
s5: starting a spiral mesh belt conveyor inside the dryer after a discharging spiral inside the discharging conveyor is started for a period of time;
s6: starting the forming machine after the spiral mesh belt conveyor is started for a period of time;
s7: starting the feeding conveyor after the system forming machine is started for a period of time;
s8: wet sludge is conveyed to the interior of a feeding conveyor through a wet sludge inlet, the feeding conveyor discharges the wet sludge through a wet sludge outlet and inputs the wet sludge into a forming machine through a first feeding hole, the forming machine extrudes the wet sludge into granules or strips and discharges the wet sludge through a first discharging hole and enters the interior of the surface of a mesh belt conveyor of a drying machine through a second feeding hole, the sludge spirally rises on the mesh belt conveyor to move, a heater introduces hot air to the bottom of an air distribution pipe through a fourth air outlet and a first air inlet and is scattered in the whole drying machine through a plurality of air distribution holes, so that the wet sludge is in contact with and dried;
s9: adjusting the rotating speed of a mesh belt conveyor in the dryer, and controlling the retention time of wet sludge in the dryer;
s10: the water content of wet sludge in the dryer is detected through sampling, and the rotating speed of the mesh belt conveyor is controlled and stabilized after the water content meets the requirement.
S11: wet air dried by sludge in the dryer enters the condenser through the third air inlet under the power action of the circulating fan, and the wet air is cooled by the condenser to separate out condensate; the condensate enters the filter through the water outlet; the condenser and the filter are respectively discharged to a factory building pipe ditch through a first sewage discharge outlet and a second sewage discharge outlet, and the sewage discharge valve controls intermittent sewage discharge; the condensate carries part of solid impurities, and the solid impurities are removed through a filter, so that the heat transfer efficiency in the process of recycling the waste heat of downstream equipment is ensured;
s12: the condensate filtered by the filter is used for heating wet sludge at the front section of the feeding conveyor; the steam condensate discharged by the heater is used for heating wet sludge at the rear section of the feeding conveyor, the feeding conveyor enters the steam condensate into the discharging conveyor through the liquid inlet through the steam condensate outlet, the dried sludge in the discharging conveyor is cooled, the subsequent temporary storage or transportation is facilitated, and the steam condensate is recycled by the outer pipe.
The invention has the technical effects and advantages that:
1. the invention carries out forming treatment on the sludge through the forming machine, and carries out drying treatment on the formed wet sludge through the spiral mesh belt conveyor in the drying machine, in the drying treatment process, the wet sludge is fully contacted with the drying hot air flow introduced into the air distribution holes on the surface of the air distribution pipe, the contact area of the dispersed and formed wet sludge is increased, and the drying speed and the drying efficiency for the high-viscosity sludge are high, the drying efficiency is high, the evaporation speed of the water in the sludge is high, and the drying speed and the drying efficiency are increased.
2. According to the invention, the wet and hot air dried in the dryer is introduced into the condenser for cooling treatment by the power of the circulating fan, and the precipitated condensate is filtered by the filter and used for preheating the wet sludge in the feeding conveyor; the dry air is heated by the heater and then circularly used for drying the sludge in the dryer, the non-condensed steam in the system is periodically discharged, the discharged gas is safely discharged after being treated and reaches the standard, the waste heat after the heat exchange in the system is fully recycled, and the remarkable energy saving effect is achieved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 shows a flow diagram of a drying treatment system for highly viscous sludge according to an embodiment of the present invention;
fig. 2 is a schematic view showing an internal structure of a dryer according to an embodiment of the present invention;
in the figure: 1. a feed conveyor; 101. a wet sludge inlet; 102. a wet sludge outlet; 103. a vapor condensate inlet; 104. a vapor condensate outlet; 105. heating the water inlet; 2. a forming machine; 201. a first feed port; 202. a first discharge port; 3. a dryer; 301. a second feed port; 302. a mesh belt conveyor; 303. a second discharge port; 304. a first air outlet; 305. a first air inlet; 306. distributing an air pipe; 4. a discharge conveyor; 401. a third feed inlet; 402. a third discharge port; 403. a liquid inlet; 5. a circulating fan; 501. a second air inlet; 502. a second air outlet; 6. a condenser; 601. a third air inlet; 602. a third air outlet; 603. a first drain outlet; 604. a condensate outlet; 7. a heater; 701. a fourth air inlet; 702. a fourth air outlet; 8. a filter; 801. a water inlet; 802. a water outlet; 803. a second blowdown outlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
The invention provides a high-viscosity sludge drying treatment system, as shown in figure 1, the high-viscosity sludge drying treatment system comprises a feeding conveyor 1, a forming machine 2, a dryer 3, a discharging conveyor 4, a circulating fan 5, a condenser 6, a heater 7 and a filter 8, and the sludge drying device in the embodiment of the invention further comprises a plurality of valves, wherein the valves are gradually controlled to be opened and closed in a manual adjustment mode, so that the flow of sludge, water and air in each period can be controlled. The input end of the feeding conveyor 1 is provided with a wet sludge inlet 101, the other end of the feeding conveyor 1 is provided with a wet sludge outlet 102, the wet sludge inlet 101 is positioned at the top of the feeding conveyor 1, the wet sludge outlet 102 is positioned at one side of the bottom of the feeding conveyor 1, and the wet sludge outlet 102 is communicated with a first feeding hole 201 at the input end of the forming machine 2; and the feed conveyor 1 is a shaftless conveyor.
The first discharge hole 202 of the output end of the forming machine 2 is connected with the second feed hole 301 of the input end of the dryer 3, and the first discharge hole 202 of the feeding conveyor 1 of the forming machine 2 is communicated with the inside of the dryer 3;
the drier 3 is set to be closed, so that the moisture evaporated in the sludge is prevented from floating in the outside air, the environmental pollution is avoided, the economic development is promoted, and the ecological environment is protected. A second feeding hole 301 at the input end of the dryer 3 is communicated with a first discharging hole 202 at the output end of the forming machine 2, a second discharging hole 303 at the output end of the dryer 3 is connected with a third feeding hole 401 at the input end of the discharging conveyor 4, a spiral mesh belt conveyor 302 is arranged in the dryer 3, the dryer 3 drives sludge to ascend in a spiral mode through the mesh belt conveyor 302, so that the retention time of the sludge on the surface of the mesh belt conveyor 302 is increased, the heat exchange efficiency of the mesh belt conveyor 302 is increased, a first air inlet 305 is arranged at the bottom of the dryer 3, an air distribution pipe 306 is further arranged in the dryer 3, a plurality of air distribution holes are formed in the surface of the air distribution pipe 306, the first air inlet 305 is connected with the air distribution pipe 306, a first air outlet 304 is formed in the top of the dryer 3, and the first air outlet 304 is communicated with a second air inlet 501;
the output end of the discharging conveyor 4 is provided with a third discharging hole 402;
a second air outlet 502 at the output end of the circulating fan 5 is communicated with a third air inlet 601 at the input end of the condenser 6;
a third air outlet 602 of the condenser 6 is communicated with a fourth air inlet 701 at the input end of the heater 7, the condenser 6 is connected with an outer pipe through circulating cooling water upper water and circulating cooling water return water, a first sewage discharge outlet 603 on one side of the bottom of the condenser 6 is communicated with a second sewage discharge outlet 803 on one side of the filter 8 and communicated with a whole plant sewage pipe network, and a condensate water outlet 604 at the bottom of the condenser 6 is connected with a water inlet 801 at the top of the filter 8;
a fourth air outlet 702 at the output end of the heater 7 is communicated with a first air inlet 305 at the bottom input end of the dryer 3, and the heater 7 is also communicated with a steam condensate inlet 103 at the bottom of the feeding conveyor 1;
the water outlet 802 at the bottom of the filter 8 is in communication with the heated water inlet 105 at the bottom of the feed conveyor 1.
Furthermore, the surface of the feeding conveyor 1 is sleeved with two sections of heating jackets for preheating and heating wet sludge pieces inside the feeding conveyor 1, the feeding conveyor 1 conveys wet sludge through a tube side, and the shell side of the feeding conveyor 1 is respectively communicated with the heater 7 and the filter 8 through a steam condensate inlet 103 and a heating water inlet 105 through pipelines.
Further, a cooling jacket is sleeved on the surface of the discharging conveyor 4 and used for cooling the dried sludge inside the discharging conveyor 4, and a liquid inlet 403 at the bottom of the discharging conveyor 4 is communicated with the steam condensate outlet 104 at the top of the feeding conveyor 1. The discharging conveyor 4 conveys the dried sludge through a tube pass, and the shell pass of the feeding conveyor 1 is respectively communicated with the feeding conveyor 1 and the dryer 3 through a liquid inlet 403 and a third feeding port 401 through pipelines.
Further, the heater 7 is heated by one of steam, electricity or other heat sources.
The invention also provides a drying treatment method for high-viscosity sludge, which adopts the drying treatment system for high-viscosity sludge, and is shown in figure 2: taking industrial sludge drying treatment as an example; the method comprises the following steps of (1) moisture content of wet sludge being 75-85%, sludge treatment capacity being 1t/h dry basis, sludge temperature being normal temperature, air temperature being 70-110 ℃ after being heated by a heater 7, circulating cooling water upper water temperature being 32 ℃, circulating cooling water return water temperature being 42 ℃, heating steam pressure being 0.5MPa, and temperature being 159 ℃, and comprises the following steps:
s1: the outer pipe utilizes the circulating cooling water to introduce circulating cooling water for cooling into the condenser 6, the water supply pressure is 0.45MPa, and the water return pressure is 0.25 MPa;
s2: starting a circulating fan 5, stabilizing the internal pressure of each part of the whole sludge drying treatment system through the circulating fan 5, wherein the time for starting the circulating fan 5 is about 30s, and the internal pressure of the whole system is stable;
s3: a third air outlet 602 of the condenser 6 introduces steam into the heater 7 through a fourth air inlet 701, the heater 7 heats the internal steam, the temperature of the internal steam is controlled to be 70-110 ℃, and steam condensate is input into the feeding conveyor 1 through a steam condensate inlet 103;
s4: starting the discharging conveyor 4 until the discharging spiral in the discharging conveyor 4 works stably;
s5: starting the spiral mesh belt conveyor 302 in the dryer 3 after the spiral discharging in the discharging conveyor 4 is started for a period of about 30 s;
s6: starting the forming machine 2 after the spiral mesh belt conveyor 302 is started for a period of about 30 s;
s7: starting the system forming machine 2 for 1min, and then starting the feeding conveyor 1;
s8: wet sludge is conveyed to the interior of a feeding conveyor 1 through a wet sludge inlet 101, the feeding conveyor 1 discharges the wet sludge through a wet sludge outlet 102 and inputs the wet sludge into a forming machine 2 through a first feeding hole 201, the forming machine 2 extrudes the wet sludge into granules or strips and discharges the wet sludge through a first discharging hole 202 and enters the surface of a mesh belt conveyor 302 of a dryer 3 through a second feeding hole 301, the sludge spirally rises on the mesh belt conveyor 302 and moves, a heater 7 introduces hot air to the bottom of an air distribution pipe 306 through a fourth air outlet 702 and a first air inlet 305 and is scattered in the whole dryer 3 through a plurality of air distribution holes, so that the wet sludge is in contact drying;
s9: adjusting the rotating speed of a mesh belt conveyor 302 in the dryer 3, and controlling the retention time of wet sludge in the dryer 3;
s10: the water content of wet sludge in the dryer 3 is detected by sampling, and the rotating speed of the mesh belt conveyor 302 is controlled and stabilized after the water content meets the requirement.
S11: wet air dried by sludge in the dryer 3 enters the condenser 6 through the third air inlet 601 under the power action of the circulating fan 5, and the wet air is cooled by the condenser 6 to separate out condensate; the condensate enters the filter 8 through the condensate outlet 604; the condenser 6 and the filter 8 are respectively discharged to a factory building pipe ditch through a first sewage discharge outlet 603 and a second sewage discharge outlet 803, and the sewage discharge valve controls intermittent sewage discharge; the condensate carries part of solid impurities, and the solid impurities are removed through the filter 8, so that the heat transfer efficiency in the process of recycling the waste heat of downstream equipment is ensured;
s12: the condensate filtered by the filter 8 is used for heating wet sludge at the front section of the feeding conveyor 1, and the temperature of the condensate filtered by the filter 8 is about 70 ℃; the steam condensate discharged by the heater 7 is used for heating wet sludge at the rear section of the feeding conveyor 1, the temperature of the steam condensate discharged by the heater 7 is 90-98 ℃, so that the wet sludge in the feeding conveyor 1 is heated to 70 ℃, the feeding conveyor 1 enters the steam condensate into the discharging conveyor 4 through the steam condensate outlet 104 through the liquid inlet 403, the temperature of the steam condensate outlet 104 is about 40 ℃, the temperature of the dried sludge in the discharging conveyor 4 is reduced, the temperature of the dried sludge in the discharging conveyor 4 is about 50 ℃, subsequent temporary storage or transportation is facilitated, and the steam condensate is recycled to the outer pipe.
The sludge is formed by the forming machine 2, and the formed wet sludge is dried by the spiral mesh belt conveyor 302 in the dryer 3, in the drying process, the wet sludge is fully contacted with the drying hot air introduced from the air distribution holes on the surface of the air distribution pipe 306, the contact area of the formed wet sludge is increased by dispersion, the drying efficiency is high, the evaporation speed of the sludge moisture is high, and compared with the indirect drying speed and the drying efficiency, the drying speed and the drying efficiency can be improved by about 10-30%. The wet and hot air after the sludge drying enters the condenser 6 for cooling treatment under the power action of the circulating fan 5, and the separated condensate is filtered by the filter 8 and used for preheating the wet sludge in the feeding conveyor 1; the dry air is heated by the heater 7 and then circularly used for drying sludge in the dryer 3, the non-condensed steam in the system is periodically discharged, and the discharged gas is safely discharged after being treated and reaches the standard. The sludge drying treatment equipment provided by the embodiment of the invention has the advantages of high integration level, small occupied area, flexible sludge inlet and outlet positions, convenience in operation, low manufacturing cost and wide applicability, and the sludge drying treatment equipment also can fully recycle waste heat after heat exchange in the system, so that the energy is obviously saved.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. The utility model provides a high viscous sludge drying process system which characterized in that: the system comprises a feeding conveyor (1), a forming machine (2), a drying machine (3), a discharging conveyor (4), a circulating fan (5), a condenser (6), a heater (7) and a filter (8), wherein the input end of the feeding conveyor (1) is provided with a wet sludge inlet (101), the other end of the feeding conveyor is provided with a wet sludge outlet (102), and the wet sludge outlet (102) is communicated with a first feeding hole (201) at the input end of the forming machine (2);
a first discharge hole (202) at the output end of the forming machine (2) is connected with a second feed hole (301) at the input end of the drying machine (3), and the first discharge hole (202) of the forming machine (2) is communicated with the inside of the drying machine (3);
a second feeding hole (301) at the input end of the dryer (3) is communicated with a first discharging hole (202) at the output end of the forming machine (2), a second discharging hole (303) at the output end of the dryer (3) is connected with a third feeding hole (401) at the input end of the discharging conveyor (4), a spiral mesh belt conveyor (302) is arranged inside the dryer (3), a first air inlet (305) is arranged at the bottom of the dryer (3), an air distribution pipe (306) is also arranged inside the dryer (3), a plurality of air distribution holes are formed in the surface of the air distribution pipe (306), the first air inlet (305) is connected with the air distribution pipe (306), a first air outlet (304) is formed in the top of the dryer (3), and the first air outlet (304) is communicated with a second air inlet (501) at the input end of the circulating fan (5);
the output end of the discharging conveyor (4) is provided with a third discharging hole (402);
a second air outlet (502) at the output end of the circulating fan (5) is communicated with a third air inlet (601) at the input end of the condenser (6);
a third air outlet (602) of the condenser (6) is communicated with a fourth air inlet (701) at the input end of the heater (7), the condenser (6) is connected with an outer pipe through circulating cooling water upper water and circulating cooling water return water, a first sewage discharge outlet (603) on one side of the bottom of the condenser (6) is communicated with a second sewage discharge outlet (803) on one side of the filter (8) and communicated with a whole plant sewage pipe network, and a condensate water outlet (604) on the bottom of the condenser (6) is connected with a water inlet (801) on the top of the filter (8);
a fourth air outlet (702) at the output end of the heater (7) is communicated with a first air inlet (305) at the bottom input end of the dryer (3), and the heater (7) is also communicated with a steam condensate inlet (103) at the bottom of the feeding conveyor (1);
a water outlet (802) at the bottom of the filter (8) is communicated with a heating water inlet (105) at the bottom of the feeding conveyor (1).
2. The high viscosity sludge drying treatment system according to claim 1, wherein:
the surface of the feeding conveyor (1) is sleeved with two sections of heating jackets and used for preheating and heating wet sludge pieces inside the feeding conveyor (1), the feeding conveyor (1) conveys wet sludge through a tube side, and a shell side of the feeding conveyor (1) is respectively communicated with the heater (7) and the filter (8) through a steam condensate inlet (103) and a heating water inlet (105) through pipelines.
3. The high viscosity sludge drying treatment system according to claim 2, wherein:
the surface of the discharging conveyor (4) is sleeved with a cooling jacket and used for cooling dry sludge in the discharging conveyor (4), and a liquid inlet (403) at the bottom of the discharging conveyor (4) is communicated with a steam condensate outlet (104) at the top of the feeding conveyor (1).
4. The high viscosity sludge drying treatment system according to claim 1, wherein:
the heater (7) adopts one of steam heating, electric heating or other heat sources.
5. A drying treatment method for high-viscosity sludge is characterized by comprising the following steps: the method adopts the drying treatment system for the high-viscosity sludge according to any one of claims 1 to 4, and comprises the following steps:
s1: the outer pipe utilizes the circulating cooling water to introduce circulating cooling water for cooling into the condenser (6);
s2: starting a circulating fan (5), and stabilizing the internal pressure of each part of the whole sludge drying treatment system through the circulating fan (5);
s3: a third air outlet (602) of the condenser (6) introduces steam into the heater (7) through a fourth air inlet (701), the heater (7) heats the steam inside, and steam condensate is input into the feeding conveyor (1) through a steam condensate inlet (103);
s4: starting the discharging conveyor (4) until a discharging spiral in the discharging conveyor (4) stably works;
s5: starting a spiral mesh belt conveyor (302) in the dryer (3) after a discharge spiral in the discharge conveyor (4) is started for a period of time;
s6: starting the forming machine (2) after the spiral mesh belt conveyor (302) is started for a period of time;
s7: starting the feeding conveyor (1) after the system forming machine (2) is started for a period of time;
s8: wet sludge is conveyed to the interior of a feeding conveyor (1) through a wet sludge inlet (101), the feeding conveyor (1) discharges the wet sludge through a wet sludge outlet (102) and inputs the wet sludge into a forming machine (2) through a first feeding hole (201), the forming machine (2) extrudes the wet sludge into granules or strips, the wet sludge is discharged through a first discharging hole (202) and enters the interior of the surface of a mesh belt conveyor (302) of a dryer (3) through a second feeding hole (301), the sludge spirally ascends on the mesh belt conveyor (302), a heater (7) introduces hot air to the bottom of an air distribution pipe (306) through a fourth air outlet (702) and a first air inlet (305), and a plurality of air distribution holes are scattered in the whole dryer (3) so that the wet sludge is in contact with and dried;
s9: adjusting the rotating speed of a mesh belt conveyor (302) in the dryer (3) and controlling the retention time of wet sludge in the dryer (3);
s10: the water content of wet sludge in the dryer (3) is detected by sampling, and the rotating speed of the stable mesh belt conveyor (302) is controlled after the water content meets the requirement;
s11: wet air dried by sludge in the dryer (3) enters the condenser (6) through a third air inlet (601) under the power action of a circulating fan (5), and the wet air is cooled by the condenser (6) to separate out condensate; the condensate enters the filter (8) through the water outlet 604; the condenser (6) and the filter (8) are respectively discharged to a factory building pipe ditch through a first blowdown outlet (603) and a second blowdown outlet (803), and a blowdown valve controls intermittent blowdown; the condensate carries part of solid impurities, and the solid impurities are removed through a filter (8), so that the heat transfer efficiency in the process of recycling the waste heat of downstream equipment is ensured;
s12: the condensate filtered by the filter (8) is used for heating wet sludge at the front section of the feeding conveyor (1); steam condensate discharged by the heater (7) is used for heating wet sludge at the rear section of the feeding conveyor (1), the feeding conveyor (1) enters the steam condensate into the discharging conveyor (4) through the liquid inlet (403) through the steam condensate outlet (104), dried sludge in the discharging conveyor (4) is cooled, subsequent temporary storage or transportation is facilitated, and the steam condensate is recycled to the outer pipe.
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