CN215887036U - Horizontal dry-type anaerobic reactor heat preservation heating system - Google Patents
Horizontal dry-type anaerobic reactor heat preservation heating system Download PDFInfo
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- CN215887036U CN215887036U CN202122316816.3U CN202122316816U CN215887036U CN 215887036 U CN215887036 U CN 215887036U CN 202122316816 U CN202122316816 U CN 202122316816U CN 215887036 U CN215887036 U CN 215887036U
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Abstract
The utility model discloses a heat preservation heating system of a horizontal dry-type anaerobic reactor, which comprises: the system comprises at least three zone heating subsystems, wherein each zone heating subsystem is sequentially covered and arranged on the side wall and the bin bottom of the horizontal dry anaerobic reactor from front to back; each zone heating subsystem includes: the two side wall heat tracing units and the two bin bottom heat tracing units are respectively covered on the two side walls of the horizontal dry-type anaerobic reactor in the area where the two side wall heat tracing units are arranged, and the two bin bottom heat tracing units are arranged on the bin bottom of the horizontal dry-type anaerobic reactor in the area where the two bin bottom heat tracing units are arranged in parallel; each side wall heat tracing unit and each bin bottom heat tracing unit of each regional heating subsystem are respectively connected with a hot water supply main pipe and a hot water return main pipe, and each side wall heat tracing unit and each bin bottom heat tracing unit form an independent hot water circulation passage.
Description
Technical Field
The utility model relates to the field of dry anaerobic reactors, in particular to a heat preservation heating system of a horizontal dry anaerobic reactor.
Background
Anaerobic digestion is a very effective treatment process for decomposing organic substances by utilizing facultative bacteria and anaerobic bacteria to carry out anaerobic biochemical reaction and realizing stabilization and recycling. Anaerobic fermentation is classified into wet, semi-dry and dry fermentation according to the solid content of the anaerobic substrate. It is generally believed that: the dry matter content is lower than 15 percent and is wet fermentation, the dry matter content is 25 percent to 40 percent and is semi-dry between the wet fermentation and the dry fermentation. According to the anaerobic reaction temperature, medium-temperature and high-temperature fermentation can be carried out; wherein the medium temperature anaerobic digestion temperature is maintained at 35 +/-2 ℃, the solid retention time is more than 20 days, the organic matter volume load is generally 2.0-4.0 kg/m3 d, the organic matter decomposition rate can reach 35-45 percent, and the gas production rate is generally 0.75-1.10 Nm3(iv)/kgVSS (removed); the high-temperature anaerobic digestion temperature is controlled to 55 +/-2 ℃, and the method is suitable for the growth of methanogen thermophile. The high-temperature anaerobic digestion organic matter has high decomposition speed, and can effectively kill various pathogenic bacteria and parasitic ova. Generally, the decomposition rate of organic matters can reach 35 to 45 percent.
Temperature is a key parameter affecting anaerobic digestion. Fluctuations in temperature beyond 2 ℃ will affect the digestion and the gas production rate. Therefore, the stable operation temperature needs to be controlled during the operation process, and the variation range is preferably controlled within +/-1 ℃.
Because the horizontal reactor for carrying out dry anaerobic reaction is not very high, the occupied area is larger, and aiming at the heat preservation heating technology of the existing horizontal reactor, a heating coil is placed in the reactor and is in direct contact with materials through a heating pipeline for heat exchange.
However, the heat exchange method of the heating pipeline in direct contact with the material has at least the following disadvantages: (1) if the problems of pipeline damage and the like occur in the anaerobic reactor, the maintenance can be realized at very high cost; (2) because the temperature of hot water in the heating pipeline is generally 60-80 ℃, the heat exchange efficiency is really increased by the direct contact of materials and the heating pipeline, but most of the horizontal anaerobic reactors are dry anaerobic reactors, the rotating speed of a stirrer is very low, generally 2-5 r/min, the local temperature is easily overhigh, and the sensitive anaerobic microorganisms are greatly influenced.
In view of the above, the present invention is particularly proposed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a heat preservation heating system of a horizontal dry-type anaerobic reactor, which not only has low maintenance cost, but also can uniformly preserve heat in the reactor, and avoid overhigh local temperature, thereby solving the technical problems in the prior art.
The purpose of the utility model is realized by the following technical scheme:
the embodiment of the utility model provides a heat preservation and heating system of a horizontal dry-type anaerobic reactor, which comprises:
the system comprises at least three zone heating subsystems, wherein each zone heating subsystem is sequentially covered and arranged on the side wall and the bin bottom of the horizontal dry anaerobic reactor from front to back;
each zone heating subsystem includes: the two side wall heat tracing units and the two bin bottom heat tracing units are respectively covered on the two side walls of the horizontal dry-type anaerobic reactor in the area where the two side wall heat tracing units are arranged, and the two bin bottom heat tracing units are arranged on the bin bottom of the horizontal dry-type anaerobic reactor in the area where the two bin bottom heat tracing units are arranged in parallel;
each side wall heat tracing unit and each bin bottom heat tracing unit of each regional heating subsystem are respectively connected with a hot water supply main pipe and a hot water return main pipe, and each side wall heat tracing unit and each bin bottom heat tracing unit form an independent hot water circulation passage.
Compared with the prior art, the heat preservation heating system of the horizontal dry-type anaerobic reactor provided by the utility model has the beneficial effects that:
by adopting a plurality of regional heating subsystems, the heating system is sequentially arranged on the side wall and the bin bottom of the horizontal dry-type anaerobic reactor in a covering manner from front to back, each regional heating subsystem is formed by two side wall heat tracing units and two bin bottom heat tracing units, each side wall heat tracing unit and each bin bottom heat tracing unit are respectively connected with a hot water supply main pipe and a hot water return main pipe, each side wall heat tracing unit and each bin bottom heat tracing unit form an independent hot water circulation passage, the side wall and the bin bottom of the horizontal dry-type anaerobic reactor can be uniformly and controllably heated in a heat preservation manner, and the heating system is divided into a plurality of units, so that the heating system is uniform in heat preservation and uniform and is convenient for subsequent maintenance.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic view of a thermal insulation heating system of a horizontal dry anaerobic reactor according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a heat supply pipeline of the heat preservation heating system of the horizontal dry anaerobic reactor provided by the embodiment of the utility model;
FIG. 3 is a schematic structural diagram of a side wall heat tracing unit and a bin bottom heat tracing unit of the horizontal dry anaerobic reactor heat preservation heating system provided by the embodiment of the utility model;
FIG. 4 is a schematic view of a self-controlled exhaust valve and an exhaust valve of the thermal insulation heating system of the horizontal dry anaerobic reactor provided by the embodiment of the utility model;
in the figure: 1-a zone heating subsystem; 11-side wall heat tracing unit; 111-sidewall heating module; 112-a water inlet valve; 113-a water return valve; 114-a cross-over line valve; 12-a cabin bottom heat tracing unit; 121-bin bottom heating module; 122-self-controlled exhaust valve; 123-an evacuation valve; 2-a horizontal dry anaerobic reactor; 3-a hot water supply main; 4-hot water return header pipe.
Detailed Description
The technical scheme in the embodiment of the utility model is clearly and completely described below by combining the attached drawings in the embodiment of the utility model; it is to be understood that the described embodiments are merely exemplary of the utility model, and are not intended to limit the utility model to the particular forms disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The terms that may be used herein are first described as follows:
the term "and/or" means that either or both can be achieved, for example, X and/or Y means that both cases include "X" or "Y" as well as three cases including "X and Y".
The terms "comprising," "including," "containing," "having," or other similar terms of meaning should be construed as non-exclusive inclusions. For example: including a feature (e.g., material, component, ingredient, carrier, formulation, material, dimension, part, component, mechanism, device, process, procedure, method, reaction condition, processing condition, parameter, algorithm, signal, data, product, or article of manufacture), is to be construed as including not only the particular feature explicitly listed but also other features not explicitly listed as such which are known in the art.
The term "consisting of … …" is meant to exclude any technical feature elements not explicitly listed. If used in a claim, the term shall render the claim closed except for the inclusion of the technical features that are expressly listed except for the conventional impurities associated therewith. If the term occurs in only one clause of the claims, it is defined only to the elements explicitly recited in that clause, and elements recited in other clauses are not excluded from the overall claims.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured," etc., are to be construed broadly, as for example: can be fixedly connected, can also be detachably connected or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms herein can be understood by those of ordinary skill in the art as appropriate.
The terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in an orientation or positional relationship that is indicated based on the orientation or positional relationship shown in the drawings for ease of description and simplicity of description only, and are not intended to imply or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting herein.
The horizontal dry anaerobic reactor heat preservation heating system provided by the utility model is described in detail below. Details which are not described in detail in the embodiments of the utility model belong to the prior art which is known to the person skilled in the art. Those not specifically mentioned in the examples of the present invention were carried out according to the conventional conditions in the art or conditions suggested by the manufacturer. The reagents or instruments used in the examples of the present invention are not specified by manufacturers, and are all conventional products available by commercial purchase.
As shown in fig. 1 and 2, an embodiment of the present invention provides a horizontal dry anaerobic reactor thermal insulation heating system, including:
the system comprises at least three zone heating subsystems, wherein each zone heating subsystem is sequentially covered and arranged on the side wall and the bin bottom of the horizontal dry anaerobic reactor from front to back;
each zone heating subsystem includes: the two side wall heat tracing units and the two bin bottom heat tracing units are respectively covered on the two side walls of the horizontal dry-type anaerobic reactor in the area where the two side wall heat tracing units are arranged, and the two bin bottom heat tracing units are arranged on the bin bottom of the horizontal dry-type anaerobic reactor in the area where the two bin bottom heat tracing units are arranged in parallel;
each side wall heat tracing unit and each bin bottom heat tracing unit of each regional heating subsystem are respectively connected with a hot water supply main pipe and a hot water return main pipe, and each side wall heat tracing unit and each bin bottom heat tracing unit form an independent hot water circulation passage.
In the heat-preservation heating system, each side wall heat tracing unit consists of at least three side wall heating modules, each side wall heating module is connected to the hot water supply main pipe in parallel through a heat supply branch pipe provided with a valve, and the tail end of the hot water supply main pipe is connected with the hot water return main pipe;
each bin bottom heating module is connected in series between the hot water main supply pipe and the hot water return main pipe, a water inlet control valve is arranged on the hot water main supply pipe connected with the first bin bottom heating module, and a return water control valve is arranged on the hot water return main pipe connected with the last bin bottom heating module.
In the heat-preservation heating system, each side wall heating module is connected to the hot water main supply pipe through a water inlet pipe provided with a water inlet valve and a water return pipe provided with a water return valve, and a pipeline crossing valve is arranged on the hot water main supply pipe between the connection positions of the water inlet pipe and the water return pipe.
In the heat-preservation heating system, the water inlet valve, the water return valve and the crossover pipeline valve are all electric regulating valves. The electric regulating valve is adopted to facilitate the heat supply control and regulation of each module.
In the heat-preservation heating system, each side wall heating module consists of a zigzag steel pipe;
the upper part of the side wall heating module is provided with a self-control exhaust valve, and the lower part of the side wall heating module is provided with an exhaust valve.
In the heat-preservation heating system, each bin bottom heating module consists of a zigzag steel pipe;
the upper part of the bin bottom heating module is provided with a self-control exhaust valve, and the lower part of the bin bottom heating module is provided with an exhaust valve.
In the heat preservation heating system, each side wall heating module is buckled on the side wall of the horizontal dry-type anaerobic reactor through a C-shaped steel plate;
each bin bottom heating module is buckled on the bin bottom of the horizontal dry-type anaerobic reactor through a C-shaped steel plate.
In the heat-insulating heating system, each side wall heating module of the side wall heat tracing unit is wrapped in the heat-insulating material on the side wall of the horizontal dry anaerobic reactor. Because every lateral wall heating module all is connected through the inlet tube that is equipped with inlet valve and the wet return that is equipped with the wet return valve on the hot water main that supplies water to, be equipped with the pipeline valve of strideing across on the hot water main that is equipped with between inlet tube and the wet return junction, when single module broke down like this, be convenient for through the water inlet of this trouble module of each valve control, go out water, can not influence the heat supply of other modules, also be convenient for carry out follow-up maintenance to this trouble module.
In summary, according to the heat preservation heating system of the horizontal dry-type anaerobic reactor provided by the embodiment of the utility model, the heat supply system is divided into a plurality of regional heating subsystems, each regional heating subsystem is composed of two side wall heat tracing units and two bin bottom heat tracing units, each side wall heat tracing unit and each bin bottom heat tracing unit are composed of at least three heating modules, so that the whole heat preservation heating system is composed of a plurality of heating modules, each heating module is connected to a hot water supply main pipe and a hot water return main pipe, and each side wall heat tracing unit and each bin bottom heat tracing unit form an independent hot water circulation passage, so that the heat preservation heating is easier to control, the uniformity is better, and the subsequent maintenance is more convenient.
In order to more clearly show the technical scheme and the technical effects provided by the present invention, the heat preservation and heating system of the horizontal dry anaerobic reactor provided by the embodiment of the present invention is described in detail with specific embodiments below.
Examples
The embodiment of the utility model provides a heat preservation heating system of a large horizontal anaerobic reactor, which can achieve better heat exchange efficiency and accurately control the flow of hot water, thereby ensuring that the temperature of materials in the reactor is relatively stable; meanwhile, when the heating system is damaged, online maintenance can be performed in modes of local disconnection and the like, and normal operation of other heating units is not affected.
As shown in figure 1, the horizontal dry anaerobic reactor has the total length of 35 meters, the height of 10 meters and the bottom of a semicircle with the diameter of 5 meters, and in order to achieve precise control and safe isolation of the zones, the heating system is divided into a front zone heating subsystem, a middle zone heating subsystem and a rear zone heating subsystem, and each zone heating subsystem comprises: the heating device comprises two side wall heat tracing units and two bin bottom heat tracing units, wherein each side wall heat tracing unit and each bin bottom heat tracing unit are composed of 3-4 small heating modules (namely a side wall heating module and a bin bottom heating module). As shown in fig. 2, 3 hot water supply main pipes and 4 hot water return main pipes are used for controlling the hot water flow rate to accurately control the temperatures of the front, middle and rear three zone heating subsystems through electric regulating valves.
Because each of the side wall heat tracing units needs to be wrapped inside the heat insulation material, the heat insulation material cannot be subjected to fault maintenance, and each heating module is provided with an inlet and outlet valve and a crossover pipeline valve, and is isolated and discarded when a single heating module breaks down. The bottom tracing can be isolated by a single unit to perform maintenance work on each module.
The structural form of a single heating module (a side wall heating module or a bin bottom heating module) is shown in figure 3, heating is respectively buckled on the side wall and the bin bottom of the reactor through a C-shaped steel plate, and the pipeline of each heating module is in a Z shape, so that the heat exchange time is prolonged, and the heat exchange efficiency is improved.
Meanwhile, a self-control exhaust valve is arranged at the high position of each heating module, so that the influence of heating effect caused by gas entering is prevented; and the emptying valves are arranged at the lower positions, so that the modules are convenient to overhaul.
In summary, in the heat-preservation heating system of the embodiment of the utility model, the heat-preservation heating system covering the side wall and the bin bottom of the whole reactor is formed by adopting the plurality of heating modules covering the smaller area, and the heat-preservation heating system can more accurately control each heat-preservation heating area by matching with the specific connection mode of each heating module with the hot water supply main pipe and the hot water return main pipe, so that the heat-preservation heating effect in the reactor is ensured, the subsequent maintenance of each heating module is facilitated, and the maintenance cost is reduced.
The above description is only for the preferred embodiment of the present invention, but the 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 are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Claims (8)
1. A heat preservation and heating system of a horizontal dry anaerobic reactor is characterized by comprising:
the system comprises at least three zone heating subsystems, wherein each zone heating subsystem is sequentially covered and arranged on the side wall and the bin bottom of the horizontal dry anaerobic reactor from front to back;
each zone heating subsystem includes: the two side wall heat tracing units and the two bin bottom heat tracing units are respectively covered on the two side walls of the horizontal dry-type anaerobic reactor in the area where the two side wall heat tracing units are arranged, and the two bin bottom heat tracing units are arranged on the bin bottom of the horizontal dry-type anaerobic reactor in the area where the two bin bottom heat tracing units are arranged in parallel;
each side wall heat tracing unit and each bin bottom heat tracing unit of each regional heating subsystem are respectively connected with a hot water supply main pipe and a hot water return main pipe, and each side wall heat tracing unit and each bin bottom heat tracing unit form an independent hot water circulation passage.
2. The horizontal dry-type anaerobic reactor heat-preservation heating system according to claim 1, wherein each side wall heat tracing unit is composed of at least three side wall heating modules, each side wall heating module is connected in parallel to the hot water supply main pipe through a heat supply branch pipe provided with a valve, and the tail end of the hot water supply main pipe is connected with the hot water return main pipe;
each bin bottom heat tracing unit is composed of at least three bin bottom heating modules, and each bin bottom heating module is connected in series between the hot water main supply pipe and the hot water return main pipe.
3. The horizontal dry anaerobic reactor thermal insulation heating system according to claim 2, wherein each side wall heating module is connected to the hot water supply main pipe through a water inlet pipe provided with a water inlet valve and a water return pipe provided with a water return valve, and a crossover line valve is arranged on the hot water supply main pipe between the connection positions of the water inlet pipe and the water return pipe.
4. The horizontal dry anaerobic reactor heat preservation and heating system according to claim 3, wherein the water inlet valve, the water return valve and the crossover line valve are all electric control valves.
5. The horizontal dry anaerobic reactor thermal insulation heating system according to claim 2, wherein each side wall heating module is composed of a zigzag steel pipe;
the upper part of the side wall heating module is provided with a self-control exhaust valve, and the lower part of the side wall heating module is provided with an exhaust valve.
6. The horizontal dry anaerobic reactor heat preservation heating system according to claim 2, wherein each silo bottom heating module is composed of a zigzag steel pipe;
the upper part of the bin bottom heating module is provided with a self-control exhaust valve, and the lower part of the bin bottom heating module is provided with an exhaust valve.
7. The horizontal dry anaerobic reactor heat preservation heating system according to claim 2, wherein each side wall heating module is buckled on the side wall of the horizontal dry anaerobic reactor through a C-shaped steel plate;
each bin bottom heating module is buckled on the bin bottom of the horizontal dry-type anaerobic reactor through a C-shaped steel plate.
8. The horizontal dry anaerobic reactor heat preservation heating system according to any one of claims 2 to 7, wherein each side wall heating module of the side wall heat tracing unit is wrapped in the heat preservation material of the side wall of the horizontal dry anaerobic reactor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122316816.3U CN215887036U (en) | 2021-09-24 | 2021-09-24 | Horizontal dry-type anaerobic reactor heat preservation heating system |
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| CN202122316816.3U CN215887036U (en) | 2021-09-24 | 2021-09-24 | Horizontal dry-type anaerobic reactor heat preservation heating system |
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| CN215887036U true CN215887036U (en) | 2022-02-22 |
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