CN215057619U - System of sludge drying and incineration coupled gas and steam combined cycle unit - Google Patents
System of sludge drying and incineration coupled gas and steam combined cycle unit Download PDFInfo
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- CN215057619U CN215057619U CN202120553469.3U CN202120553469U CN215057619U CN 215057619 U CN215057619 U CN 215057619U CN 202120553469 U CN202120553469 U CN 202120553469U CN 215057619 U CN215057619 U CN 215057619U
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Abstract
The utility model belongs to the technical field of solid waste handles, concretely relates to system of coupling gas steam combined cycle unit is burned in sludge drying, including air feed unit, sludge drying unit and gas collection unit, the air feed unit supplies sludge incinerator and gas steam combined cycle unit with the natural gas respectively, sludge drying unit utilizes sludge incinerator steam and gas steam combined cycle unit's heat supply steam to carry out the mummification to mud, sends the condensate water after the sludge drying to the condensate water system and the sludge incineration water supply system of gas steam combined cycle unit respectively simultaneously, the gas collection unit collects the gas of sludge drying unit to the combustion chamber of gas steam combined cycle unit is sent into to the gas of will collecting. The utility model discloses can save the area that the sludge drying burned, reduce investment and the running cost that the sludge drying burned, reduce the consumption of the primary energy, realize the cyclic utilization of working medium, reduce the repeated construction, have good economic benefits.
Description
Technical Field
The utility model belongs to the technical field of solid waste handles, concretely relates to sludge drying burns coupling gas steam combined cycle unit's system.
Background
According to technical policies (trial implementation) of sludge treatment and disposal and pollution prevention and control in urban sewage treatment plants, the sludge treatment and disposal realizes reduction, stabilization and harmlessness of sludge on the premise of safety, environmental protection and economy, achieves the purposes of energy conservation, emission reduction and development of recycling economy, and encourages recovery and utilization of energy and resources in the sludge in the process. The sludge treatment is sequentially carried out by various treatment methods such as marine abandonment, land landfill, composting, drying, incineration and the like, the sludge drying incineration technology has great progress along with the continuous optimization of the drying technology and the incineration technology and the maturity of the technology, and the technology has typical engineering application at home and abroad. Technical policy (trial) of sludge treatment and disposal and pollution prevention and control in urban sewage treatment plants suggests that in large and medium-sized cities with developed economy, a sludge incineration process can be adopted, and a combined drying and incineration mode is encouraged to be adopted, so that the heat energy utilization efficiency of sludge is improved. The sludge drying incineration technology can treat a large amount of sludge in a short time and can recover incineration heat, is an efficient technical means for sludge disposal at present, but the independent sludge drying incineration faces the problem of higher construction and operation cost due to lower sludge heat value.
When the sludge is independently incinerated, the water content of the sludge after mechanical dehydration from a sewage treatment plant is as high as about 80%, the sludge does not have a heat value and can not be combusted, the sludge can be combusted after being dried, and the sludge is mostly incinerated and dried by adopting a heat drying mode, namely the sludge is heated and dried by using steam generated when the sludge is incinerated to recover waste heat. When the self calorific value of the sludge is lower, the steam generated by sludge incineration can not meet the requirement of drying steam of the sludge, and at the moment, the steam needs to be supplemented, and two modes can be generally adopted: (1) a natural gas combustion-supporting boiler is added, and insufficient steam is supplemented by the natural gas combustion-supporting boiler; (2) and when the condition is met, the supplementary steam is supplemented through the heat supply steam of the plant area.
The sludge incineration requires that the combustion temperature in the hearth is above 850 ℃ and the retention time of high-temperature flue gas in the hearth is not less than 2s, natural gas needs to be combusted for starting and combustion supporting in the starting stage and the low-load stage, the external natural gas in the plant needs to be subjected to module processing such as metering analysis, cyclone dust removal, filtration, pressure regulation and the like after entering the plant, a special pressure regulating station area is arranged, and the module is high in investment and operation cost.
The odor generated by sludge drying and incineration is divided into three types according to different sources and odor concentration: high concentration odor, medium concentration odor, and low concentration odor. The gas carried by the drier and the odor of the scraper for conveying the dried sludge belong to high-concentration odor, and the gas is collected in a centralized manner and then conveyed to a sludge incinerator for incineration; the odor collected by a sludge receiving bin, a sludge storage bin and a drying chamber channel of a material system is medium-concentration odor, and the calculated amount of the medium-concentration odor in the part is about 25000m3/h according to the arrangement condition of a certain project and the designed ventilation times when the sludge with 80% of water enters the plant is 800 t/d; the material system sludge drying room, the unloading hall, the receiving room and other rooms need to keep micro negative pressure, mechanical air exhaust is adopted, the collected odor is low-concentration odor, and the amount of the low-concentration odor is about 95000m3/h according to the arrangement condition of a certain project and the designed air exchange times when the sludge with 80% of water enters the plant is 800 t/d. The total air volume of the middle-concentration odor and the low-concentration odor is larger, the occupied area of the device for treating the part of odor is larger, and the cost is higher.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a system of sludge drying incineration coupling gas steam combined cycle unit in order to solve the problem that the prior art crowning energy consumption, high cost, not considered energy recovery.
In order to achieve the above object, the utility model adopts the following technical scheme: a system of a sludge drying and incineration coupled gas and steam combined cycle unit comprises:
the gas supply unit supplies natural gas to the sludge incinerator and the gas-steam combined cycle unit respectively;
the sludge drying unit is used for drying sludge by using steam of the sludge incinerator and heat supply steam of the gas-steam combined cycle unit, and simultaneously delivering condensed water obtained after sludge drying to a condensed water system of the gas-steam combined cycle unit and a sludge incineration water supply system respectively;
and the gas collecting unit is used for collecting the gas of the sludge drying unit and sending the collected gas into a combustion chamber of the gas-steam combined cycle unit.
Preferably, the natural gas of the gas supply unit sequentially passes through the inlet module, the metering chromatographic analysis module, the cyclone separation module and the fine filtering module and then respectively enters the sludge incinerator and the gas-steam combined cycle unit through the pressure regulating module.
Preferably, the sludge drying unit comprises a sludge drying machine, the sludge drying machine receives wet sludge from a wet sludge bin through a sludge pump, the wet sludge is dried by using heating steam of the sludge incinerator steam and the gas-steam combined cycle unit, dried dry sludge enters the sludge incinerator through a dry sludge bin, and dried condensed water is respectively sent to a gas turbine area condensed water system and a sludge incineration water supply system through a condensed water tank.
Preferably, the gas-steam combined cycle unit comprises a gas turbine and a steam turbine which are connected with the generator, and further comprises a gas compressor connected with air, a combustion chamber connected with natural gas and a waste heat boiler arranged between the gas turbine and the steam turbine.
Preferably, the gas collection unit is connected with a sludge discharge room, a sludge receiving bin, a sludge receiving room, a sludge storage room and an exhaust system of the drying machine room of the sludge drying unit, and the gas collection unit sends the collected gas into the combustion chamber through the gas compressor.
Preferably, the system further comprises an auxiliary unit, wherein the auxiliary unit comprises an electricity, rainwater, fire protection and circulating water system which are arranged in a coupling mode.
A method for coupling sludge drying and incineration with a fuel gas and steam combined cycle unit comprises the following steps:
(1) coupling the heating steam of the sludge drying unit and the dried condensed water with a gas-steam combined cycle unit;
(2) coupling natural gas for sludge drying and incineration and natural gas for a gas-steam combined cycle unit;
(3) the medium-concentration odor and the low-concentration odor of the sludge drying unit are coupled with the air for combustion of the gas-steam combined cycle unit.
Preferably, in the step (1), insufficient steam of the sludge drying unit is provided by heating steam of the combustion engine area, and redundant condensed water of the sludge drying unit is sent to a condensed water system of the gas-steam combined cycle unit.
Preferably, the natural gas in the step (2) is uniformly metered and filtered, and then enters the sludge incinerator and the gas-steam combined cycle unit corresponding to the natural gas respectively through the two pressure regulating modules.
Preferably, the medium-concentration odor and the low-concentration odor of the sludge drying unit in the step (3) enter a compressor of the gas-steam combined cycle unit together with air, and are sent to a combustion chamber through the compressor for combustion.
After the technical scheme is adopted, the utility model provides a pair of system and method of sludge drying burns coupling gas steam combined cycle unit has following beneficial effect:
1) the utility model has good economic benefit, when the steam supplied outside the sludge drying is calculated according to 13t/h, about 10.4 ten thousand tons of condensed water are correspondingly recovered per year, the part is converted into the cost of the desalted water, and the annual operating cost can be saved by about 50 ten thousand yuan; the natural gas for sludge incineration is coupled with the natural gas for the gas-steam combined cycle unit and is led out from a pressure regulating station of the gas-steam combined cycle unit, the price of the natural gas can be directly settled according to the gas price for the gas-steam combined cycle unit, and the natural gas treatment part module is shared, when the natural gas consumption of the sludge incinerator is calculated according to 2000Nm3/h, the investment cost can be saved by about 50 ten thousand, and in addition, the annual operating cost can be saved by 10 ten thousand yuan; the medium-concentration odor and the low-concentration odor in the sludge drying and incinerating area are directly introduced to a gas compressor of the gas turbine steam combined cycle unit without treatment, and the air volume is calculated according to 120000m3/h, so that the investment cost can be saved by about 400 ten thousand, and the annual operating cost can be saved by about 70 ten thousand yuan;
2) the utility model reduces the occupied area, and saves the occupied area of facilities such as a starting boiler, a pressure regulating station, an odor treatment device and the like after adopting the coupling scheme;
3) the utility model can save primary energy, and after the coupling scheme is adopted, insufficient sludge drying steam is provided by the heating steam of the gas-steam combined cycle unit, thereby reducing the consumption of primary energy natural gas;
4) the utility model discloses a coupling setting of other auxiliary unit (if systems such as power consumption, rainwater, fire control, circulating water) can save investment and working costs.
Therefore, the utility model discloses can reduce the investment and the running cost that the sludge drying burned, save area, improve energy utilization and rate, have good economic benefits.
Drawings
FIG. 1 is a flow chart of a sludge drying and incinerating system;
FIG. 2 is a flow diagram of a gas steam combined cycle plant;
FIG. 3 is a flow chart of the coupling of the steam trap system according to the present invention;
fig. 4 is a flow chart of a natural gas system coupling using the present invention;
fig. 5 is a flow chart of the coupling of the odor system according to the present invention.
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.
The utility model provides a pair of system of sludge drying incineration coupling gas steam combined cycle unit, make full use of as shown in figure 1 sludge drying incineration system and as shown in figure 2 these two relevant parts of system of gas steam combined cycle unit couple, as shown in figures 3-5, including air feed unit, sludge drying unit and gas collection unit.
The gas supply unit supplies natural gas to sludge incinerator and gas steam combined cycle unit respectively, and is concrete, the natural gas of gas supply unit gets into sludge incinerator and gas steam combined cycle unit through the pressure regulating module respectively after entrance module, measurement chromatographic analysis module, whirlwind separation module and smart filtration module in proper order, and sludge incinerator and gas steam combined cycle unit sharing natural gas pressure regulating system promptly, sludge drying burns the system and also can enjoy gas steam combined cycle unit with natural gas and use the gas price, adopts the natural gas centralized processing scheme, can reduce area, reduce investment cost and operation maintenance cost.
The sludge drying unit dries sludge by using heat supply steam of a sludge incinerator steam and a gas steam combined cycle unit, and simultaneously sends the dried sludge condensate to a condensate system and a sludge incineration water supply system of the gas steam combined cycle unit respectively, specifically, the sludge drying unit comprises a sludge drying machine, the sludge drying machine receives wet sludge from a wet sludge bin through a sludge pump and dries the wet sludge by using the heat supply steam of the sludge incinerator steam and the gas steam combined cycle unit, dried dry sludge enters a sludge incinerator through a dry sludge bin, the dried condensate is sent to the condensate system and the sludge incineration water supply system of a condensation area through a condensate water tank respectively, and further, a steam drying interface for a decontamination sludge drying machine is reserved in a heat supply steam main pipe of a gas turbine by the gas steam combined cycle unit, in addition, steam is led from a gas turbine project, appropriate parameters (back pressure) can be set, and a back pressure machine can be set to improve the efficiency; the heat recovered by sludge drying and dewatering can heat desalted water of a fuel machine project, and energy loss is reduced.
The gas of sludge drying unit is collected to the gas collection unit to the combustion chamber of gas steam combined cycle unit is sent into to the gas that will collect, and is specific, the gas collection unit is unloaded with the mud of sludge drying unit between, mud receives storehouse, mud and is received between, mud is stored between and the exhaust system between the desiccator and is connected, the gas that the gas collection unit will collect sends into the combustion chamber through the compressor, and the production of sludge drying incineration system promptly and the middle concentration foul smell that can't absorb and low concentration foul smell concentrate and collect the back and send to gas steam combined cycle unit compressor entry through sealed tuber pipe, send the gas turbine combustion chamber burning through the compressor, and the sludge drying burns then need not to handle this a large amount of foul smell.
Further, the gas steam combined cycle unit includes gas turbine and the steam turbine who is connected with the generator, still includes the compressor of access air, inserts the combustion chamber of natural gas and sets up the exhaust-heat boiler between gas turbine and steam turbine, the utility model discloses the system still includes auxiliary unit, auxiliary unit includes power consumption, rainwater, fire control and the circulating water system that the coupling set up.
The utility model also provides a method of sludge drying and incineration coupling gas and steam combined cycle unit, including following steps:
(1) coupling heating steam of a sludge drying unit and dried condensed water with a gas-steam combined cycle unit, wherein insufficient steam of the sludge drying unit is provided by heating steam of a gas turbine area, and redundant condensed water of the sludge drying unit is sent to the condensed water system of the gas-steam combined cycle unit;
(2) coupling natural gas for sludge drying and incineration with a natural gas system for a gas-steam combined cycle unit, wherein the natural gas is uniformly metered and filtered and then enters the sludge incinerator and the gas-steam combined cycle unit which respectively correspond to the natural gas through two pressure regulating modules;
(3) the medium-concentration odor and the low-concentration odor of the sludge drying unit are coupled with air for combustion of the gas-steam combined cycle unit, and the medium-concentration odor and the low-concentration odor of the sludge drying unit and the air enter a gas compressor of the gas-steam combined cycle unit together and are sent into a combustion chamber through the gas compressor for combustion.
The high-quality steam of the middle gas-steam combined cycle unit is used for power generation, and low-quality steam extraction is used for heat supply and sludge drying, so that the step utilization of energy is realized; the working medium to external heating portion is not retrieved generally, and the gas steam combined cycle unit need supply this partial heat supply steam's demineralized water quantity and get into the condensate system after heating it, the utility model discloses send the condensate water behind the sludge drying back gas steam combined cycle unit and retrieve, both retrieved the working medium and retrieved the heat, had better economic benefits.
Sludge drying burns and all comes from the outer natural gas pipe network of factory with natural gas and gas steam combined cycle, if independent setting pressure regulating station respectively, then increase investment cost and operation maintenance cost, again because the natural gas belongs to easily fire explosive article, the pressure regulating station is great with the distance requirement of peripheral building and equipment, independent setting needs more area, adopts the utility model discloses after the coupling is handled, can correspondingly save area, sludge drying burns the system and can enjoy the gas price of gas steam combined cycle unit moreover.
The medium concentration foul smell and the low concentration foul smell that the sludge drying system of burning produced concentrate collect after need handle up to standard after just can discharge, centralized processing device area is big, the expense is high, and the utility model discloses directly lead this foul smell to gas steam combined cycle unit compressor, then get into the combustion chamber and carry out high temperature combustion, need not to handle, consequently have better economic benefits and social.
To sum up, the utility model discloses can save the area that the sludge drying burns, reduce investment and the running cost that the sludge drying burns, reduce the consumption of the primary energy, realize the cyclic utilization of working medium, reduce the repeated construction, have good economic benefits.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. The utility model provides a system of sludge drying burns coupling gas steam combined cycle unit which characterized in that: the method comprises the following steps:
the gas supply unit supplies natural gas to the sludge incinerator and the gas-steam combined cycle unit respectively;
the sludge drying unit is used for drying sludge by using steam of the sludge incinerator and heat supply steam of the gas-steam combined cycle unit, and simultaneously delivering condensed water obtained after sludge drying to a condensed water system of the gas-steam combined cycle unit and a sludge incineration water supply system respectively;
and the gas collecting unit is used for collecting the gas of the sludge drying unit and sending the collected gas into a combustion chamber of the gas-steam combined cycle unit.
2. The system of the sludge drying and incineration coupled gas-steam combined cycle unit as claimed in claim 1, wherein: and the natural gas of the gas supply unit sequentially passes through the inlet module, the metering chromatographic analysis module, the cyclone separation module and the fine filtering module and then respectively enters the sludge incinerator and the gas-steam combined cycle unit through the pressure regulating module.
3. The system of the sludge drying and incineration coupled gas-steam combined cycle unit as claimed in claim 1, wherein: the sludge drying unit comprises a sludge drying machine, the sludge drying machine receives wet sludge from a wet sludge bin through a sludge pump, the wet sludge is dried by utilizing heating steam of a sludge incinerator steam and a gas-steam combined cycle unit, dried dry sludge enters the sludge incinerator through a dry sludge bin, and dried condensed water is respectively sent to a gas turbine area condensed water system and a sludge incineration water supply system through a condensed water tank.
4. The system of the sludge drying and incineration coupled gas-steam combined cycle unit as claimed in claim 1, wherein: the gas-steam combined cycle unit comprises a gas turbine and a steam turbine which are connected with a generator, a gas compressor connected with air, a combustion chamber connected with natural gas and a waste heat boiler arranged between the gas turbine and the steam turbine.
5. The system of the sludge drying and incineration coupled gas-steam combined cycle unit as claimed in claim 1, wherein: the gas collection unit is connected with a sludge discharge room, a sludge receiving bin, a sludge receiving room, a sludge storage room and an exhaust system of the drier room of the sludge drying unit, and the gas collection unit sends collected gas into the combustion chamber through the gas compressor.
6. The system of the sludge drying and incineration coupled gas-steam combined cycle unit as claimed in claim 1, wherein: still include auxiliary unit, auxiliary unit is including the power consumption, rainwater, fire control and the circulating water system that the coupling set up.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120553469.3U CN215057619U (en) | 2021-03-18 | 2021-03-18 | System of sludge drying and incineration coupled gas and steam combined cycle unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120553469.3U CN215057619U (en) | 2021-03-18 | 2021-03-18 | System of sludge drying and incineration coupled gas and steam combined cycle unit |
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| CN215057619U true CN215057619U (en) | 2021-12-07 |
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