CN215373577U - Cement kiln waste heat recycling system - Google Patents
Cement kiln waste heat recycling system Download PDFInfo
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- CN215373577U CN215373577U CN202121726710.4U CN202121726710U CN215373577U CN 215373577 U CN215373577 U CN 215373577U CN 202121726710 U CN202121726710 U CN 202121726710U CN 215373577 U CN215373577 U CN 215373577U
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Abstract
The utility model discloses a cement kiln waste heat recycling system, which belongs to the technical field of sludge treatment and comprises a low-temperature drying device and a cement kiln, wherein the low-temperature drying device is provided with a drying chamber, a feed inlet of the cement kiln is connected with a discharge outlet of the drying chamber, and the system also comprises a dehumidifying device which is connected with the drying chamber; the first heat exchanger is connected with the dehumidification heat device through a circulating heat exchange pipe; the dust remover is connected with the heat exchange outlet of the first heat exchanger; and the smoke outlet of the cement kiln is connected with the heat exchange inlet of the first heat exchanger. The utility model provides a waste heat recycling system of a cement kiln, waste heat flue gas generated by the cement kiln is subjected to heat exchange through a first heat exchanger to realize waste heat recycling, and the first heat exchanger is subjected to heat exchange with a dehumidifying and heating device to indirectly supply heat to low-temperature drying equipment, so that waste heat recycling of the waste heat flue gas in the cement kiln is realized, energy consumption and cost are saved, and the maximum utilization of energy is realized.
Description
Technical Field
The utility model relates to the technical field of sludge treatment, in particular to a waste heat recycling system of a cement kiln.
Background
With the increase of sewage treatment facilities, the improvement of treatment rate and the deepening of treatment degree in China, the sludge yield of a sewage treatment plant is increased sharply. The annual output of sludge of the current urban sewage treatment plant in China exceeds 3000 ten thousand tons. The sludge contains a large amount of organic matters, rich nutrients such as nitrogen and phosphorus, heavy metals, germs, pathogenic bacteria and the like, and if the sludge is not treated and discharged, the environment is seriously polluted.
Because the main chemical component of the sludge is SiO2、Fe2O3And Al2O3It is similar to siliceous materials in cement raw materials, and therefore can be used in cement raw materials instead of clay. Meanwhile, organic matter components in the sludge can generate heat, and the burned sludge can replace part of coal to be used for burning clinker, so that the sludge can be used as a substitute raw material for cement production to perform harmless and recycling treatment. Therefore, the method is an economic and feasible resource utilization mode by using the cement kiln and the low-temperature sludge drying equipment to cooperatively treat the sludge of the urban sewage plant.
The low-temperature sludge drying equipment sends hot air into a drying chamber through a heat supply source, and transfers heat to sludge materials to vaporize moisture in the sludge to obtain drying. When the cement kiln is produced, a large amount of waste heat smoke can be generated and directly discharged into the atmosphere to cause energy waste, so that the waste heat smoke can be reused for drying sludge, and the energy cost is saved. However, the existing recycling system directly heats sludge by using flue gas, the temperature is too high, harmful gas is excessively removed, and the pressure for treating the flue gas and the tail gas is increased.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model provides the waste heat recycling system of the cement kiln, which can reasonably utilize waste heat flue gas generated in the cement kiln to carry out sludge drying, carries out heat exchange through a heat exchanger, indirectly supplies heat to low-temperature drying equipment, and saves energy consumption and cost.
The technical scheme adopted by the utility model is as follows:
the utility model provides a cement kiln waste heat recovery utilizes system, includes low temperature mummification equipment, cement kiln, low temperature mummification equipment has the drying chamber, the feed inlet of cement kiln with the discharge gate of drying chamber links to each other, the system still includes:
the dehumidifying device is connected with the drying chamber;
the first heat exchanger is connected with the dehumidification heat device through a circulating heat exchange pipe;
the dust remover is connected with the heat exchange outlet of the first heat exchanger;
and the smoke outlet of the cement kiln is connected with the heat exchange inlet of the first heat exchanger.
Waste heat flue gas generated by the cement kiln is subjected to heat exchange through the first heat exchanger to realize waste heat recovery, and the first heat exchanger is subjected to heat exchange with the dehumidifying and heating device to indirectly supply heat to the low-temperature drying equipment, so that waste heat recovery of the waste heat flue gas in the cement kiln is realized, energy consumption and cost are saved, and the maximum utilization of energy is realized.
In the waste heat recycling system for the cement kiln, a plurality of first air inlets, a plurality of second air inlets and a plurality of air return inlets are formed in the drying chamber, the first air inlets are communicated with the lower portion of the drying chamber, the second air inlets are communicated with the middle portion of the drying chamber, the air return inlets are communicated with the upper portion of the drying chamber, and the dehumidifying device is respectively connected with the first air inlets, the second air inlets and the air return inlets.
In the waste heat recycling system for the cement kiln disclosed by the application, the system further comprises a cooling tower which is connected with the dehumidifying device through a circulating water pipe.
In the waste heat recycling system for the cement kiln, a filter, a heat regenerator, a water-cooling evaporator, a second heat exchanger and a third heat exchanger are arranged in the dehumidifying and heating device.
In the waste heat recycling system for the cement kiln, the first heat exchanger is connected with the second heat exchanger and the third heat exchanger through circulating heat exchange tubes; and the circulating heat exchange tube is provided with a circulating pump.
In the waste heat recycling system of the cement kiln, the cooling tower is connected with the water-cooling evaporator through a circulating water pipe; and a circulating water pump is arranged on the circulating water pipe.
In the waste heat recycling system of the cement kiln, the cement kiln is provided with a decomposing furnace, a smoke chamber, a rotary kiln and a circulating fan; the feed inlet of the decomposing furnace is connected with the discharge outlet of the drying chamber; the upper end of the smoke chamber is communicated with the decomposing furnace, and the lower end of the smoke chamber is communicated with the rotary kiln; a smoke outlet of the smoke chamber is connected with a heat exchange inlet of the first heat exchanger; and an air inlet of the circulating fan is communicated with the atmosphere, and an air outlet of the circulating fan is communicated with the kiln head of the rotary kiln.
In the cement kiln waste heat recovery and utilization system disclosed in the application, the air inlet of the circulating fan is connected with the exhaust port of the dust remover.
In the cement kiln waste heat recovery and utilization system disclosed in the application, the feed inlet of the decomposing furnace is connected with the dust exhaust port of the dust remover.
In the cement kiln waste heat recovery utilizes system that this application discloses, the gas vent of dust remover still links to each other with the draught fan, the draught fan links to each other with the chimney.
The utility model has the beneficial effects that:
the waste heat flue gas generated by the cement kiln is subjected to heat exchange through the first heat exchanger to realize waste heat recovery, and the first heat exchanger is subjected to heat exchange with the second heat exchanger and the third heat exchanger of the dehumidification heat device to indirectly supply heat to the low-temperature drying equipment, so that the waste heat recovery of the waste heat flue gas in the cement kiln is realized, and the energy consumption and the cost are saved. The dehumidifying device can control the drying temperature, the precipitation amount of harmful gas is greatly reduced, the hot air in the drying chamber is recycled, the gas generated in the drying process is prevented from being mixed into the smoke of a cement plant to increase the tail gas treatment amount, and the gas generated in the drying process is also prevented from escaping into the atmosphere to pollute the environment. And after dust removal, gas discharged by the first heat exchanger is supplemented with air by a circulating fan and then is sent into the cement kiln, the maximum utilization of energy is realized, the obtained particles are returned to the decomposing furnace, and the recovery of materials is realized.
Drawings
In order to more clearly illustrate the embodiments of the present application 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, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a cement kiln waste heat recovery system;
FIG. 2 is a schematic view of the heat removal and dehumidification apparatus;
fig. 3 is a schematic structural view of the drying chamber.
Reference numerals: the system comprises a low-temperature drying device 1, a dehumidification heat device 2, a cement kiln 3, a first heat exchanger 4, a cooling tower 5, a dust remover 6, an induced draft fan 7, a chimney 8, a drying chamber 11, a first air inlet 12, a second air inlet 13, an air return inlet 14, a filter 21, a heat regenerator 22, a water-cooling evaporator 23, a second heat exchanger 24, a third heat exchanger 25, a decomposing furnace 31, a smoke chamber 32, a rotary kiln 33, a circulating fan 34, a circulating heat exchange pipe 41, a circulating pump 42, a circulating water pipe 51 and a circulating water pump 52.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The following disclosure provides many different embodiments or examples for implementing different features of the utility model. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In order to solve the problems in the prior art, an embodiment of the present invention provides a system for recycling waste heat of a cement kiln, which has a structure as shown in fig. 1 to 3, and includes:
the low-temperature drying device 1 is provided with a drying chamber 11. The drying chamber 11 is used for drying the sludge.
And the dehumidifying and heating device 2 is connected with the drying chamber 11. The dehumidifying device 2 is used for heating and dehumidifying the sludge in the drying chamber 11, thereby drying the sludge. The hot air generated by the dehumidifying device 2 enters the drying chamber 6 to dry the sludge, the moisture evaporated by the sludge is taken away by the hot air and then returns to the dehumidifying device 2, and the dehumidifying device 2 cools and dehumidifies the return air to discharge the moisture and re-sends the heat in the return air to the drying chamber 11 to dry the sludge through heat exchange, so that the maximum utilization of energy is realized.
And a feed inlet of the cement kiln 3 is connected with a discharge outlet of the drying chamber 11. The cement kiln 3 is used for burning the sludge dried in the drying chamber 11 to be absolutely dry to obtain cement clinker.
And a first heat exchanger 4 connected to the heat removal and dehumidification device 2 through a circulating heat exchange pipe 41. The first heat exchanger 4 provides a heat source for the dehumidifying heat device 2. The first heat exchanger 4 can adopt any heat exchanger in the prior art, such as a gas-liquid heat exchanger and a gas-gas heat exchanger, as long as the heat exchange of the flue gas can be realized.
And the dust remover 6 is connected with the heat exchange outlet of the first heat exchanger 4. The flue gas discharged from the first heat exchanger 4 is dedusted by a deduster 6.
Wherein, the flue gas outlet of the cement kiln 3 is connected with the heat exchange inlet of the first heat exchanger 4. The cement kiln 3 can generate a large amount of waste heat flue gas, and a heat source can be provided for the dehumidifying and heating device 2 through the first heat exchanger 4. Waste heat flue gas generated in the cement kiln 3 enters the first heat exchanger 4 for heat exchange, the first heat exchanger 4 and the dehumidifying heat device 2 perform heat exchange to provide a heat source, the drying chamber 11 is indirectly provided with the heat source, and the waste heat of the cement kiln is recycled.
In one embodiment, a plurality of first air inlets 12, second air inlets 13 and return air inlets 14 are disposed in the drying chamber 11. As shown in fig. 3, the first air inlet 12 is communicated with the lower portion of the drying chamber 11, the second air inlet 13 is communicated with the middle portion of the drying chamber 11, and the return air inlet 14 is communicated with the upper portion of the drying chamber 11. The dehumidifying and heating device 2 is connected to the first air inlet 12, the second air inlet 13 and the air return inlet 14. The hot air generated by the dehumidification device 2 enters the drying chamber 11 through the first air inlet 12 and the second air inlet 13 to dry the sludge, and the hot air takes away the moisture evaporated by the sludge and returns to the dehumidification device 2 through the air return inlet 14.
In one embodiment, the recycling system further comprises a cooling tower 5. The cooling tower 5 is connected to the dehumidifying and heating apparatus 2 through a circulating water pipe 51. The cooling tower 5 provides a cooling source for the dehumidifying and heating apparatus 2.
In one embodiment, a filter 21, a regenerator 22, a water-cooled evaporator 23, a second heat exchanger 24, and a third heat exchanger 25 are disposed in the heat removal and removal device 2. The filter 21 is located in the return air path of the heat removal and removal device 2. The filter 21 is a bag filter, and the hot and humid air in the dehumidification heat apparatus 2 is filtered by the bag filter. And a part of the damp and hot air filtered by the filter 21 directly exchanges heat through the third heat exchanger 25, and then enters the drying chamber 11 through the second air inlet 13 for recycling. The other part of the damp and hot air filtered by the filter 21 is cooled by the water-cooled evaporator 23 after being subjected to heat exchange by the heat regenerator 22, moisture in the damp and hot air after being cooled is condensed into condensed water to be discharged out of the dehumidifying device 2, and formed dry and cold air enters the second heat exchanger 24 for heat exchange after being heated and warmed by the heat regenerator 22, is subjected to secondary heating, and then enters the drying chamber 11 from the first air inlet 12 for cyclic utilization. Traditional low temperature mummification equipment 1 usually provides the heat source for drying chamber 11 by the heat pump principle of dehumidification heat pump, and in this embodiment, the waste heat flue gas in the rational utilization cement kiln realizes waste heat recovery with the heat transfer of first heat exchanger 4, provides the heat source for dehumidification heat facility 2, indirectly provides the heat source for drying chamber 11, has practiced thrift energy consumption and cost when realizing the recycle of cement kiln waste heat.
In one embodiment, the first heat exchanger 4 is connected to the second and third heat exchangers 24, 25 by circulating heat exchange tubes 41. The circulating heat exchange pipe 41 is provided with a circulating pump 42. The first heat exchanger 4 provides a heat source for the second heat exchanger 24 and the third heat exchanger 25. The second heat exchanger 24 and the third heat exchanger 25 may be any heat exchanger in the prior art, such as an air-liquid heat exchanger, an air-air heat exchanger, as long as heat exchange of air in the dehumidification heat apparatus 2 can be achieved.
In one embodiment, the cooling tower 5 is connected to the water-cooled evaporator 23 by a circulating water pipe 51. The circulating water pipe 51 is provided with a circulating water pump 52. The cooling tower 5 provides a cold source for the water-cooled evaporator 23.
In one embodiment, the cement kiln 3 has a decomposing furnace 31, a smoke chamber 32, a rotary kiln 33, and a circulating fan 34. The feed inlet of the decomposing furnace 31 is connected with the discharge outlet of the drying chamber 11. The upper end of the smoke chamber 32 is communicated with the decomposing furnace 31, and the lower end is communicated with the rotary kiln 33. The smoke outlet of the smoke chamber 32 is connected with the heat exchange inlet of the first heat exchanger 4. The air inlet of the circulating fan 34 is communicated with the atmosphere, and the air outlet is communicated with the kiln head of the rotary kiln 33. Air in the atmosphere enters the kiln head of the rotary kiln 33 through the circulating fan 34, heat is absorbed in the rotary kiln 33, waste heat flue gas is discharged from the smoke chamber 32 at the tail of the kiln and then enters the first heat exchanger 4 for heat exchange, the first heat exchanger 4 provides a heat source for the dehumidification device 2, and the flue gas after heat exchange enters the dust remover 6 for dust removal.
In one embodiment, the inlet of the circulation fan 34 is also connected to the outlet of the dust separator 6. The flue gas enters the kiln head of the rotary kiln 33 after being dedusted by the deduster 6 and supplemented with air by the circulating fan 34, and the circulation is repeated, so that the maximum utilization of energy can be realized.
In one embodiment, the feed port of the decomposing furnace 31 is also connected to the dust discharge port of the dust collector 6. The particles obtained in the dust remover 6 return to the decomposing furnace 31, and the recovery of the materials is realized.
In one embodiment, the exhaust of the dust separator 6 is also connected to an induced draft fan 7. The induced draft fan 7 is connected with the chimney 8. After production is finished, the dedusted flue gas is sent into a chimney 8 through an induced draft fan 7 and is discharged into the atmosphere through the chimney 8.
The working mode of the waste heat recycling system of the cement kiln comprises the following steps:
wet sludge enters the low-temperature drying device 1 and is dried in the drying chamber 11. The dehumidifying and heating device 2 provides a heat source for the drying chamber 11. The hot air generated by the dehumidifying and heating device 2 enters the drying chamber 6 to dry the sludge, the hot air takes away the moisture evaporated by the sludge and then returns to the dehumidifying and heating device 2, the hot air is firstly filtered by the filter 21, one part of damp and hot air directly exchanges heat by the third heat exchanger 25 and then enters the drying chamber 11 through the second air inlet 13 to be recycled, the other part of damp and hot air exchanges heat by the heat regenerator 22 and then is cooled by the water-cooling evaporator 23, the moisture in the damp and hot air after being cooled is condensed into condensed water to be discharged out of the dehumidifying and heating device 2, the formed dry and cold air is firstly heated by the heat regenerator 22 and then enters the second heat exchanger 24 to be subjected to heat exchange, secondary heating is carried out, and then the dry and cold air enters the drying chamber 11 from the first air inlet 12 to be recycled. The cooling tower 5 provides a cooling source for the dehumidifying and heating apparatus 2. And the sludge dried in the drying chamber 11 enters a cement kiln to be incinerated to obtain cement clinker. Meanwhile, air in the atmosphere enters the kiln head of the rotary kiln 33 through the circulating fan 34, heat is absorbed in the rotary kiln 33, waste heat flue gas is discharged from the smoke chamber 32 at the tail of the kiln and then enters the first heat exchanger 4 for heat exchange, the first heat exchanger 4 provides a heat source for the dehumidification heat device 2, the flue gas after heat exchange enters the dust remover 6 for dust removal, and then enters the kiln head of the rotary kiln 33 after air supplement through the circulating fan 34 after dust removal, and the circulation is repeated. The particles obtained in the dust collector 6 are returned to the decomposing furnace 31, and the material is recovered. After production is finished, the dedusted flue gas is sent into a chimney 8 through an induced draft fan 7 and is discharged into the atmosphere through the chimney 8.
Based on the above embodiments, the cement kiln waste heat recycling system of the embodiment of the utility model has the following advantages: the system reasonably utilizes the waste heat flue gas in the cement kiln to carry out sludge drying, and saves energy consumption and cost. Waste heat flue gas generated by the cement kiln 3 is subjected to heat exchange through the first heat exchanger 4 to realize waste heat recovery, and the first heat exchanger 4 exchanges heat with the second heat exchanger 24 and the third heat exchanger 25 to indirectly supply heat for the low-temperature drying equipment 1, so that waste heat recovery of the waste heat flue gas in the cement kiln is realized, and energy consumption and cost are saved. The dehumidifying and heating device 2 can control the drying temperature, the precipitation amount of harmful gas is greatly reduced, hot air in the drying chamber 11 is recycled, the gas generated in the drying process is prevented from being mixed into the flue gas of a cement plant to increase the tail gas treatment amount, and the gas generated in the drying process is also prevented from escaping into the atmosphere to pollute the environment. The gas discharged from the first heat exchanger 4 is dedusted, supplemented with air by a circulating fan 34, and then sent to the cement kiln 3, so that the maximum utilization of energy is realized, the obtained particles are returned to the decomposing furnace 31, and the recovery of materials is realized.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a cement kiln waste heat recovery utilizes system, includes low temperature mummification equipment (1), cement kiln (3), low temperature mummification equipment (1) has drying chamber (11), the feed inlet of cement kiln (3) with the discharge gate of drying chamber (11) links to each other, its characterized in that, the system still includes:
the dehumidifying device (2) is connected with the drying chamber (11);
a first heat exchanger (4) connected to the dehumidification thermal device (2) by a circulating heat exchange tube (41);
the dust remover (6) is connected with a heat exchange outlet of the first heat exchanger (4);
wherein, the smoke outlet of the cement kiln (3) is connected with the heat exchange inlet of the first heat exchanger (4).
2. The cement kiln waste heat recycling system according to claim 1, wherein a plurality of first air inlets (12), second air inlets (13) and air return inlets (14) are arranged in the drying chamber (11), the first air inlets (12) are communicated with the lower portion of the drying chamber (11), the second air inlets (13) are communicated with the middle portion of the drying chamber (11), the air return inlets (14) are communicated with the upper portion of the drying chamber (11), and the dehumidifying heat device (2) is respectively connected with the first air inlets (12), the second air inlets (13) and the air return inlets (14).
3. The cement kiln waste heat recovery system according to claim 1, further comprising a cooling tower (5) connected to the dehumidification heat apparatus (2) through a circulation water pipe (51).
4. The cement kiln waste heat recycling system according to claim 3, wherein a filter (21), a heat regenerator (22), a water-cooled evaporator (23), a second heat exchanger (24) and a third heat exchanger (25) are arranged in the dehumidifying and heating device (2).
5. The cement kiln waste heat recycling system according to claim 4, wherein the first heat exchanger (4) is connected with the second heat exchanger (24) and the third heat exchanger (25) through circulating heat exchange pipes (41); and a circulating pump (42) is arranged on the circulating heat exchange pipe (41).
6. The cement kiln waste heat recycling system according to claim 4, wherein the cooling tower (5) is connected with the water-cooled evaporator (23) through a circulating water pipe (51); and a circulating water pump (52) is arranged on the circulating water pipe (51).
7. The cement kiln waste heat recovery system according to claim 1, wherein the cement kiln (3) has a decomposing furnace (31), a smoke chamber (32), a rotary kiln (33) and a circulating fan (34); a feed inlet of the decomposing furnace (31) is connected with a discharge outlet of the drying chamber (11); the upper end of the smoke chamber (32) is communicated with the decomposing furnace (31), and the lower end of the smoke chamber is communicated with the rotary kiln (33); the smoke outlet of the smoke chamber (32) is connected with the heat exchange inlet of the first heat exchanger (4); and an air inlet of the circulating fan (34) is communicated with the atmosphere, and an air outlet is communicated with the kiln head of the rotary kiln (33).
8. The cement kiln waste heat recycling system according to claim 7, wherein the air inlet of the circulating fan (34) is further connected with the air outlet of the dust remover (6).
9. The cement kiln waste heat recycling system according to claim 7, characterized in that the feed inlet of the decomposing furnace (31) is further connected with a dust exhaust port of the dust remover (6).
10. The cement kiln waste heat recycling system according to claim 1, wherein the exhaust port of the dust remover (6) is further connected with an induced draft fan (7), and the induced draft fan (7) is connected with a chimney (8).
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| CN202121726710.4U CN215373577U (en) | 2021-07-28 | 2021-07-28 | Cement kiln waste heat recycling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114656124A (en) * | 2022-04-01 | 2022-06-24 | 北京金隅红树林环保技术有限责任公司 | Sludge drying process by using cement pit waste heat |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114656124A (en) * | 2022-04-01 | 2022-06-24 | 北京金隅红树林环保技术有限责任公司 | Sludge drying process by using cement pit waste heat |
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