CN214383754U - Device for recycling waste gas waste heat of superheated steam dryer - Google Patents
Device for recycling waste gas waste heat of superheated steam dryer Download PDFInfo
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- CN214383754U CN214383754U CN202022886681.XU CN202022886681U CN214383754U CN 214383754 U CN214383754 U CN 214383754U CN 202022886681 U CN202022886681 U CN 202022886681U CN 214383754 U CN214383754 U CN 214383754U
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Abstract
The utility model relates to an utilize device that superheated steam desiccator waste gas waste heat was recycled belongs to sludge drying technical field, it is proposed to the defect that mud powder humidity influences sludge drying system work efficiency greatly, preheating device sets up between mud crushing system and spiral auger, preheating device is equipped with the hollow casing of open-ended for both ends, crisscross a plurality of heat exchange tubes that are used for realizing the heat exchange to the mud powder that are provided with in preheating device, the both ends of every heat exchange tube respectively with the hollow intermediate layer intercommunication that sets up in the preheating device, one of them hollow intermediate layer and high temperature air inlet intercommunication, another hollow intermediate layer and low temperature gas outlet intercommunication, the high temperature air inlet passes through the branch road and is connected with mud drying system heat transfer return circuit, low temperature gas outlet and innocent treatment equipment intercommunication. The utility model discloses have simple structure, make full use of system waste heat, resources are saved further improves the work efficiency of system.
Description
The technical field is as follows:
the utility model belongs to the technical field of sludge drying, concretely relates to utilize device that superheated steam desiccator waste gas waste heat was recycled.
Background art:
every year, a large amount of sludge is produced in municipal sewage treatment, and the sludge is a solid waste resource containing combustible organic substances. At present, the treatment modes of sludge mainly comprise methods such as landfill, composting and incineration, wherein the sludge incineration has the obvious advantages of reduction, harmlessness and recycling and is widely applied in the world, but the sludge is difficult to be directly ignited or stably combusted due to the characteristics of low calorific value, large moisture content and the like. Therefore, mechanical dehydration treatment is required before incineration of the sludge, but mechanical dehydration can only control the water content of the sludge to about 60%, and in order to further reduce the water content of the sludge, the sludge can only be used as a fuel by a heat drying method. The current commonly used drying process is that mechanically pressed mud cakes are crushed by a crushing system and then sent into a sludge drying system for drying treatment, and the crushed sludge has larger water content, so that the workload of the drying system is increased, and the drying speed is relatively slow.
The utility model has the following contents:
the utility model discloses an overcome the big defect that influences sludge drying system work efficiency of mud powder humidity, provide an utilize device that superheated steam drier waste gas waste heat was recycled, through carrying out dehydration treatment to the mud powder in advance, reduce the moisture content that enters into mud powder in the sludge drying system, and then improve sludge drying system's work efficiency.
The utility model discloses a technical scheme lie in: the utility model provides an utilize superheated steam dryer waste gas waste heat to recycle's device, is including setting up the preheating device between mud crushing system and spiral auger, preheating device is equipped with open-ended hollow casing for both ends, and crisscross a plurality of heat exchange tubes that are used for realizing the heat exchange to the mud powder that are provided with in preheating device, the both ends of every heat exchange tube respectively with set up the hollow intermediate layer intercommunication in preheating device, one of them hollow intermediate layer and high temperature air inlet intercommunication, another hollow intermediate layer and low temperature gas outlet intercommunication, the high temperature air inlet passes through the branch road and is connected with superheated steam dryer waste gas return circuit, low temperature gas outlet and innocent treatment equipment intercommunication.
Preferably, the superheated steam dryer exhaust gas loop comprises: the superheated steam drier, the circulating fan and the heat exchanger are sequentially connected end to end through pipelines, a steam outlet of the superheated steam drier is communicated with an inlet of the heat exchanger through the circulating fan, low-temperature gas after heat exchange is sent back to the superheated steam drier through the pipelines by the heat exchanger again to form a circulating heat exchange loop, and the high-temperature air inlet is connected through a branch arranged between the circulating fan and the heat exchanger.
Preferably, the longitudinal section of the heat exchange tube is rhombic.
Preferably, a steam valve for adjusting the gas flow is further arranged on the branch.
The utility model has the advantages that:
1. the utility model discloses an add preheating device between system and spiral auger is smashed to mud, utilize the high temperature steam in the superheated steam drier waste gas waste heat return circuit through preheating device, heat dehydration to the mud powder of moisture in advance to the moisture content of mud powder in the reduction entering superheated steam drier, and then improve superheated steam drier's drying efficiency.
2. The utility model discloses design into the rhombus with the heat exchange tube in the preheating device, realize the heating dehydration to the mud powder through the contact of rhombus and mud powder and handle, the rhombus heat exchange tube of design also can prevent effectively that the mud powder from producing when the downstream from piling up in increase and mud powder area of contact.
3. The utility model discloses have simple structure, make full use of system waste heat, resources are saved further improves the work efficiency of system.
Description of the drawings:
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the internal structure of the preheating device;
FIG. 3 is a cross-sectional view A-A of FIG. 1;
wherein: the system comprises a preheating device 1, a heat exchange tube 11, a hollow interlayer 12, a high-temperature air inlet 13, a low-temperature air outlet 14, a spiral auger 2, an superheated steam drier 3, a circulating fan 4, a heat exchanger 5 and a branch 6.
The specific implementation mode is as follows:
as shown in fig. 1 to 3, the utility model relates to an utilize device that superheated steam dryer waste gas waste heat recycled, including setting up preheating device 1 between system and spiral auger 2 are smashed to mud, preheating device 1 is equipped with the hollow casing of open-ended for upper and lower both ends, and preheating device 1's upper end opening and the discharge gate intercommunication of system are smashed to mud, and preheating device 1's lower extreme opening and spiral auger 2's feed inlet intercommunication. A plurality of heat exchange tubes 11 are arranged in the preheating device 1 in a staggered mode, and the cross sections of the heat exchange tubes 11 are rhombic and used for achieving heat exchange preheating on sludge powder. The rhombic heat exchange tubes 11 can effectively prevent the sludge powder from accumulating when moving downwards while increasing the contact area with the sludge powder. The two ends of each heat exchange tube 11 are respectively communicated with a hollow interlayer 12 arranged in the preheating device 1, one hollow interlayer 12 is communicated with a high-temperature air inlet 13, the other hollow interlayer 12 is communicated with a low-temperature air outlet 14, the high-temperature air inlet 13 is connected with a waste gas loop of the superheated steam dryer 3 through a branch 6, the low-temperature air outlet 14 is communicated with a harmless treatment device, the harmless treatment device sends condensed water formed by low-temperature steam after heat exchange with sludge powder into a sewage treatment plant through a pipeline, gas in the low-temperature steam is introduced into a furnace to participate in combustion supporting, and the harmless treatment process comprises the steps of but is not limited to the above treatment processes.
The superheated steam dryer exhaust gas loop comprises: the superheated steam dryer comprises a superheated steam dryer 3, a circulating fan 4 and a heat exchanger 5 which are sequentially connected end to end through pipelines, wherein a steam outlet of the superheated steam dryer 3 is communicated with an inlet of the heat exchanger 5 through the circulating fan 4, and the superheated steam dryer can use a steam-cooling system disclosed in the publication No. CN102583945B with the patent name: the fluidized bed incineration treatment device with the sludge multistage dryer and the method thereof disclose a multistage spiral dryer or other drying medium (superheated steam) and sludge direct contact type drying device, the heat exchanger 5 can use the following patent names such as publication No. CN 102583945B: a fluidized bed sludge incinerator disclosed in the fluidized bed incineration treatment device and method with a sludge multistage dryer is characterized in that a heat exchanger 5 sends low-temperature gas after heat exchange back to a superheated steam dryer 3 through a pipeline to form a circulating heat exchange loop, a high-temperature air inlet 13 is connected through a branch 6 arranged between a circulating fan 4 and the heat exchanger 5, a steam valve used for adjusting the air flow is further arranged on the branch 6, and the air flow of high-temperature steam in the branch 6 is adjusted by adjusting the opening of the steam valve.
The working process is as follows:
the sludge cake is crushed into sludge powder in the sludge crushing system and is discharged into the preheating device 1 from the discharge hole, meanwhile, high-temperature steam in the branch 6 of the waste gas loop of the superheated steam drier enters into each heat exchange tube 11 connected in parallel from the high-temperature air inlet 13, the high-temperature steam is changed into low-temperature steam after exchanging heat with the sludge powder and flows out of the preheating device from the low-temperature air outlet 14, formed condensed water enters a sewage treatment plant through a pipeline, and gas enters the furnace through the pipeline to participate in combustion supporting.
The above description is only the preferred embodiments of the present invention, and these embodiments are all based on the present invention, and the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. The utility model provides an utilize superheated steam desiccator waste gas waste heat reuse's device which characterized in that: including preheating device (1) that sets up between sludge pulverizing system and spiral auger (2), preheating device (1) is equipped with open-ended hollow casing for both ends, and crisscross a plurality of heat exchange tubes (11) that are used for realizing the heat exchange to the mud powder that are provided with in preheating device (1), the both ends of every heat exchange tube (11) communicate with hollow intermediate layer (12) that set up in preheating device (1) respectively, and one of them hollow intermediate layer (12) and high temperature air inlet (13) intercommunication, another hollow intermediate layer (12) and low temperature gas outlet (14) intercommunication, high temperature air inlet (13) are connected with superheated steam drier waste gas return circuit through branch road (6), low temperature gas outlet (14) and innocent treatment equipment intercommunication.
2. The apparatus for reusing waste heat of exhaust gas of a superheated steam dryer according to claim 1, wherein: the superheated steam dryer exhaust gas loop comprises: through superheated steam drier (3), circulating fan (4) and heat exchanger (5) that pipeline end to end links to each other in proper order, the steam outlet of superheated steam drier (3) passes through circulating fan (4) and the entry intercommunication of heat exchanger (5), and heat exchanger (5) send the low temperature gas after the heat transfer back to superheated steam drier (3) again through the pipeline in, form the circulation heat transfer return circuit, high temperature air inlet (13) are connected through setting up branch road (6) between circulating fan (4) and heat exchanger (5).
3. The apparatus for reusing waste heat of exhaust gas of a superheated steam dryer according to claim 1 or 2, wherein: the longitudinal section of the heat exchange tube (11) is rhombic.
4. The apparatus for reusing waste heat of exhaust gas of a superheated steam dryer according to claim 3, wherein: a steam valve for adjusting the gas flow is also arranged on the branch (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022886681.XU CN214383754U (en) | 2020-12-06 | 2020-12-06 | Device for recycling waste gas waste heat of superheated steam dryer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022886681.XU CN214383754U (en) | 2020-12-06 | 2020-12-06 | Device for recycling waste gas waste heat of superheated steam dryer |
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| CN214383754U true CN214383754U (en) | 2021-10-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116444124A (en) * | 2023-06-15 | 2023-07-18 | 泰州明锋资源再生科技有限公司 | Automatic circulation drying equipment |
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2020
- 2020-12-06 CN CN202022886681.XU patent/CN214383754U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116444124A (en) * | 2023-06-15 | 2023-07-18 | 泰州明锋资源再生科技有限公司 | Automatic circulation drying equipment |
| CN116444124B (en) * | 2023-06-15 | 2023-09-01 | 泰州明锋资源再生科技有限公司 | Automatic circulation drying equipment |
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