CN213930895U - Re-flow economizer device - Google Patents
Re-flow economizer device Download PDFInfo
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- CN213930895U CN213930895U CN202022807326.9U CN202022807326U CN213930895U CN 213930895 U CN213930895 U CN 213930895U CN 202022807326 U CN202022807326 U CN 202022807326U CN 213930895 U CN213930895 U CN 213930895U
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Abstract
The utility model relates to an incineration boiler field. The technical scheme is as follows: a kind of multiple process coal economizer apparatus, including frame guard plate, ash bucket, coal economizer and steam pocket; a flue gas inlet and a flue gas outlet are respectively arranged on two sides of the frame guard plate; the ash bucket is arranged at the lower end of the frame guard plate; the top end of the frame guard plate is provided with a top sealing layer for sealing, so that a smoke gas circulation channel is formed; the frame guard plate is internally provided with an economizer, and the top of the economizer upwards passes through the top sealing layer; the method is characterized in that: the economizer comprises at least one economizer piping; the economizer pipe in each economizer piping system is divided into a pipe group I and a pipe group II, and the two pipe groups are communicated in series through the economizer header to control the flow direction of feed water; the steam drum is communicated with the economizer header through a connecting pipe; the feed water is uniformly distributed into the economizer piping through the economizer header. The device can improve the flow velocity in the pipe of the economizer, improve the heat exchange efficiency and reduce the temperature of the discharged smoke.
Description
Technical Field
The utility model relates to an incineration boiler field, more specifically the utility model relates to a compound process economizer device that says so.
Background
Along with the rapid development of the economy of China, the living standard of people is continuously improved, the quantity of domestic garbage is increased, the accompanying environmental problems are more and more prominent, and at present, the domestic garbage is mainly directly incinerated, so that the domestic garbage is recycled and reduced.
In a waste incineration waste heat boiler, the economical efficiency of a boiler unit and the working safety of a heating surface at the tail part of the boiler unit are directly influenced by the temperature of exhaust gas. The lower exhaust gas temperature is achieved in practice, the exhaust gas heat loss of the boiler can be obviously reduced, the thermal efficiency of the boiler is favorably improved, the energy is saved, and the operating cost of the boiler is reduced. Research shows that when the excess air coefficient of the boiler is constant, the heat loss of the exhaust smoke can be increased or reduced by about 1% when the temperature of the exhaust smoke is increased or reduced by about 15 ℃.
During the operation of the boiler, the longer the operation time of the boiler is, the more serious the ash deposition of the heating surface tube is, the smaller the heat exchange coefficient is caused by the ash deposition, the worse the heat transfer effect is, and the higher the exhaust gas temperature is. In order to reduce the influence of the accumulated dust on heat transfer, a soot blower is arranged on the windward side of the heating surface pipe, and the heating surface is cleaned to blow soot after the heating surface pipe runs for a period of time every day according to the dust accumulation condition. However, since the fly ash from incineration of garbage contains relatively high content of alkali metal compounds and has a low melting point, it is easy to sinter on the surface of the heated surface tube, and it is difficult to completely remove the ash deposited on the surface of the tube by using a soot blower. Therefore, after soot blowing by using the soot blower, although the heat transfer of the heating surface is improved and the smoke discharge temperature is reduced, the soot blowing is still not ideal.
Therefore, how to provide a device capable of maintaining a low exhaust gas temperature after ash deposition is an urgent problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the background technology and provide a multiple process economizer device; the device can improve the flow velocity in the pipe of the economizer, improve the heat exchange efficiency and reduce the temperature of the discharged smoke.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a kind of multiple process coal economizer apparatus, including frame guard plate, ash bucket, coal economizer and steam pocket; a flue gas inlet and a flue gas outlet are respectively arranged on two sides of the frame guard plate; the ash bucket is arranged at the lower end of the frame guard plate; the top end of the frame guard plate is provided with a top sealing layer for sealing, so that a smoke gas circulation channel is formed; the frame guard plate is internally provided with an economizer, and the top of the economizer upwards passes through the top sealing layer; the method is characterized in that:
the economizer comprises at least one economizer piping; the economizer pipe in each economizer piping system is divided into a pipe group I and a pipe group II, and the two pipe groups are communicated in series through the economizer header to control the flow direction of feed water; the steam drum is communicated with the economizer header through a connecting pipe; the feed water is uniformly distributed into the economizer piping through the economizer header.
Preferably, the economizer comprises a first economizer piping, a second economizer piping and a third economizer piping which are communicated in series; so as to promote the economizer to better absorb the heat in the high-temperature flue gas and achieve better heat exchange effect.
Preferably, in each economizer piping system, the economizer pipes of the pipe groups I and II are alternately communicated with the economizer header and are arranged in a straight line along the axial direction of the economizer header, so that the pipe groups I and II are connected in series, the uniform distribution of flue gas temperature is ensured, and the temperature deviation of the left side and the right side is prevented from being large to generate temperature pressure.
According to the above technical scheme, compare with prior art, the utility model provides a pair of compound procedure economizer device has improved the pipe wall temperature with two nest of tubes series connection backs of economizer piping, and the flow sectional area of feedwater diminishes, and the feed water velocity of flow becomes big in the piping, and the lateral heat transfer coefficient grow of feedwater, the heat exchange efficiency of whole piping obtains obviously improving.
Preferably, the economizer header comprises an economizer inlet header, an economizer pipe group I outlet header, an economizer pipe group II inlet header, an economizer pipe group II outlet header, a economizer pipe group I outlet header, a second economizer pipe group II inlet header, a second economizer pipe group II outlet header, a third economizer pipe group I outlet header, a third economizer pipe group II pipe group inlet header, a third economizer pipe group II outlet header and an economizer outlet header which are sequentially communicated according to the water flow direction; wherein the outlet header of the second pipe group of the first economizer pipe system is also the inlet header of the first pipe group of the second economizer pipe system, and the outlet header of the second pipe group of the second economizer pipe system is also the inlet header of the first pipe group of the third economizer pipe system; so as to ensure that the water supply at the inlet of the economizer is uniformly distributed in the first economizer piping system, and the water supply at the outlet of the economizer is uniformly led to the boiler barrel, thereby avoiding the bias flow of the water supply; and each economizer piping system is provided with an inlet and an outlet header to ensure that water temperature is uniformly mixed and then enters the next-stage economizer piping system.
Preferably, in the above mentioned multiple process economizer apparatus, two ends of each economizer pipe in the first economizer piping system i pipe group are respectively communicated with the first economizer piping system i pipe group inlet header and the first economizer piping system i pipe group outlet header, two ends of each economizer pipe in the first economizer piping system ii pipe group are respectively communicated with the first economizer piping system ii pipe group inlet header and the first economizer piping system ii outlet header, and the first economizer piping system i pipe group outlet header is communicated with the first economizer piping system ii pipe group inlet header through a connecting pipe;
two ends of each economizer pipe in the first pipe group of the second economizer pipe system are respectively communicated with an inlet header of the first pipe group of the second economizer pipe system and an outlet header of the first pipe group of the second economizer pipe system, two ends of each economizer pipe in the second pipe group of the second economizer pipe system are respectively communicated with an inlet header of the second pipe group of the second economizer pipe system and an outlet header of the second pipe group of the second economizer pipe system, and the outlet header of the first pipe group of the second economizer pipe system and the inlet header of the second pipe group of the second economizer pipe system are communicated through connecting pipes;
two ends of each coal economizer in the third coal economizer piping system I pipe group are respectively communicated with a third coal economizer piping system I pipe group inlet header and a third coal economizer piping system I pipe group outlet header, and two ends of each coal economizer in the third coal economizer piping system II pipe group are respectively communicated with a third coal economizer piping system II pipe group inlet header and a third coal economizer piping system II pipe group outlet header; the outlet header of the pipe group I of the third coal-saving device pipe system is communicated with the inlet header of the pipe group II of the third coal-saving device pipe system through a connecting pipe.
Preferably, in the above-described multiple-pass economizer apparatus, the frame guard is a frame composed of a steel section and a steel plate.
Preferably, in the above-mentioned multiple-flow economizer device, the first economizer piping system comprises an i pipe group and an ii pipe group, the second economizer piping system comprises an i pipe group and an ii pipe group, and the third economizer piping system comprises an i pipe group and an ii pipe group which are serpentine pipes and are provided with a plurality of rows of serpentine pipes, so as to improve the heat exchange effect.
Preferably, in the above-mentioned multiple-flow economizer device, the ash hopper is V-shaped, and the top of the ash hopper is fixed at the lower end of the frame guard plate; the top flat plate interconnect of adjacent ash bucket and seal the lower extreme of frame backplate, prevent that the flue gas from deviating.
Preferably, in the above-mentioned multiple-flow economizer device, the ash hopper is made of a steel plate, so as to ensure the service life of the flue ash hopper.
Preferably, in the above-mentioned multiple-pass economizer apparatus, the top seal is of a comb-plate structure. So as to effectively ensure the sealing of the top of the frame penetrating through the economizer pipe.
The utility model has the advantages that: compared with the prior art, the utility model provides a multiple process economizer device; by dividing each stage of economizer piping into two pipe groups, the water supply direction and the flue gas direction are in counter current; the water flow passes through one part of the pipe system, returns to the flue gas outlet through the header after being subjected to flue gas scouring heat exchange, and then passes through the other part of the pipe system to perform countercurrent flow again to perform flue gas scouring heat exchange; the flow cross-sectional area of the feed water becomes small, the feed water flow rate in the piping system becomes large, the heat exchange coefficient of the feed water side becomes large, and the heat exchange efficiency of the whole piping system is improved.
Drawings
Fig. 1 is a schematic view of the structure of the present invention;
fig. 2 is a schematic diagram of the arrangement structure of the pipe group i and the pipe group ii in all the economizer piping systems of the present invention.
Fig. 3 is an enlarged view of a portion a of fig. 1 (a perspective view of a part of the piping).
Detailed Description
The technical solution in the embodiment of the present invention is further explained below with reference to the drawings in the embodiment of the present invention.
The utility model provides a pair of compound process economizer device (refer to attached figure 1-3), include: the device comprises a frame guard plate 1, an ash bucket 2, an economizer and a steam drum 5;
two sides (the left side and the right side in the figure 1) of the frame guard plate are respectively provided with a flue inlet and a flue outlet; the ash bucket 2 is arranged at the lower end of the frame protection plate 1 and seals the lower end of the frame protection plate, and a top sealing layer 6 for sealing is arranged at the top end of the frame protection plate to form a smoke circulation channel; an economizer is arranged in the frame guard plate 1, the top of the economizer upwards passes through the top sealing layer, and the passing part is kept sealed. The structure is similar to that of the existing economizer.
The utility model discloses an improvement is: the economizer comprises at least one economizer piping; the economizer pipe in each economizer piping system is divided into a pipe group I and a pipe group II; the economizer header connects the economizer pipes of the two pipe groups in series, the steam pocket is communicated with the economizer header through a connecting pipe, and feed water is uniformly distributed into the economizer pipe system through the economizer header.
Further, the economizer comprises a first economizer piping system 31, a second economizer piping system 32 and a third economizer piping system 33, and the three economizer piping systems are communicated in series. So as to promote the economizer to better absorb the heat in the high-temperature flue gas and achieve better heat exchange effect.
See fig. 2; the two pipe groups of each economizer piping system respectively comprise a plurality of economizer pipes, all the economizer pipes of each pipe group are connected with the economizer header in parallel and are sequentially arranged along the axial direction of the economizer header. The economizer pipes in the two pipe groups are communicated with the economizer header in a mutually staggered mode and are arranged in a straight line along the axis direction of the economizer header, so that the two pipe groups of economizers are connected in series, the uniform distribution of the flue gas temperature is ensured, and the temperature deviation of the left side and the right side is avoided being large to generate temperature pressure.
Further, the first economizer piping line 31 is divided into an I-pipe group 31-1 and an II-pipe group 31-2, the second economizer piping line 32 is divided into an I-pipe group 32-1 and an II-pipe group 32-2, and the third economizer piping line 33 is divided into an I-pipe group 33-1 and an II-pipe group 33-2.
Further, the economizer header comprises an economizer inlet header 401, a first economizer piping I pipe group inlet header 402, a first economizer piping I pipe group outlet header 403, a first economizer piping II pipe group inlet header 404, a first economizer piping II pipe group outlet header 405, a second economizer piping I pipe group outlet header 406, a second economizer piping II pipe group inlet header 407, a second economizer piping II pipe group outlet header 408, a third economizer piping I pipe group outlet header 409, a third economizer piping II pipe group inlet header 410, a third economizer piping II pipe group outlet header 411 and an economizer outlet header 412 which are sequentially communicated according to the water flow direction, wherein the outlet header 405 of the second tube set of the first economizer tube system is also the inlet header of the first tube set of the second economizer tube system, and the outlet header 408 of the second tube set of the second economizer tube system is also the inlet header of the first tube set of the third economizer tube system.
Furthermore, one end of each economizer pipe in the first economizer pipe system I pipe group is communicated with the first economizer pipe system I pipe group inlet header, and the other end of each economizer pipe is communicated with the first economizer pipe system I pipe group outlet header; one end of each economizer pipe in the second economizer pipe system is communicated with the inlet header of the second economizer pipe system, and the other end of each economizer pipe is communicated with the outlet header of the second economizer pipe system; an outlet header of a pipe group I of the first economizer piping system is communicated with an inlet header of a pipe group II of the first economizer piping system through a connecting pipe;
one end of each economizer pipe in the first economizer pipe system is communicated with the inlet header of the first economizer pipe system, and the other end of each economizer pipe in the first economizer pipe system is communicated with the outlet header of the first economizer pipe system; one end of each economizer pipe in the second economizer pipe system II pipe group is communicated with the inlet header of the second economizer pipe system II pipe group, and the other end of each economizer pipe is communicated with the outlet header of the second economizer pipe system II pipe group; an outlet header of a pipe group I of the second economizer piping system is communicated with an inlet header of a pipe group II of the second economizer piping system through a connecting pipe;
one end of each coal economizer in the third coal economizer piping system I pipe group is communicated with the third coal economizer piping system I pipe group inlet header, and the other end of each coal economizer is communicated with the third coal economizer piping system I pipe group outlet header; one end of each coal economizer in the second coal economizer piping system pipe group is communicated with the inlet header of the second coal economizer piping system pipe group, and the other end of each coal economizer is communicated with the outlet header of the second coal economizer piping system pipe group; an outlet header of the pipe group I of the third coal economizer pipe system is communicated with an inlet header of the pipe group II of the third coal economizer pipe system through a connecting pipe.
FIG. 3 shows the structure of the overlapping portion of the economizer pipe of FIG. 1 (the rest of the overlapping portions are similar); as can be seen from the figure: a plurality of I-tube group coal saving tubes 31-11 led out from an I-tube group outlet header 403 of the first coal saving device tube system are downwards communicated with the I-tube group of the first coal saving device tube system; a plurality of coal saving pipes 31-21 of the second group led out from the outlet header 405 of the second group of the first coal saving pipe system are communicated with the second group of the first coal saving pipe system. In FIG. 1, the vertical portions of the economizer pipes 31-11 of the I-tube group and the economizer pipes 31-21 of the II-tube group are overlapped to form a straight line.
Further, the frame panel 1 is a frame (existing structure) composed of section steel and steel plate.
Furthermore, all the economizer pipes in the economizer (including the first economizer pipe system I pipe group and the first economizer pipe system II pipe group, the second economizer pipe system I pipe group and the second economizer pipe system II pipe group, and the third economizer pipe system I pipe group and the third economizer pipe system II pipe group) are serpentine pipes (prior art).
Further, the ash bucket 2 is V-shaped, and the top of the ash bucket is fixed at the lower end of the frame guard plate 1; the top flat plates of the adjacent ash buckets are mutually connected and seal the lower ends of the frame guard plates, so that the flue gas in the flue gas corridor is prevented from flowing bias.
Furthermore, the ash bucket 2 is made of steel plates so as to ensure the service life of the flue ash bucket.
Further, the top seal 6 is of a comb-shaped plate structure (conventional structure) so as to effectively ensure the sealing of the coal economizer pipe penetrating part at the top of the frame.
The embodiment of the utility model discloses a double-process economizer device; the feed water runs in a reverse flow (opposite to the movement direction of the flue gas), and after passing through one half of the piping system of each stage of the economizer, the feed water flows in a reverse flow through the other half of the piping system, so that the flow velocity in the economizer pipe is improved, the heat exchange efficiency is improved, and the exhaust gas temperature is reduced.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
Claims (10)
1. A kind of coal economizer device of the compound process, including the frame guard plate (1), the ash bucket (2), coal economizer and steam pocket (5); a flue gas inlet and a flue gas outlet are respectively arranged on two sides of the frame guard plate; the ash bucket is arranged at the lower end of the frame protection plate and seals the lower end of the frame protection plate, and a top sealing layer (6) for sealing is arranged at the top end of the frame protection plate, so that a smoke gas circulation channel is formed; the frame guard plate is internally provided with an economizer, and the top of the economizer upwards passes through the top sealing layer; the method is characterized in that:
the economizer comprises at least one economizer piping; the economizer pipe in each economizer piping system is divided into a pipe group I and a pipe group II, and the two pipe groups are communicated in series through the economizer header to control the flow direction of feed water; the steam drum is communicated with the economizer header through a connecting pipe; the feed water is uniformly distributed into the economizer piping through the economizer header.
2. The multiple-pass economizer device of claim 1 wherein: the economizer comprises a first economizer piping system (31), a second economizer piping system (32) and a third economizer piping system (33) which are communicated in series; so as to promote the economizer to better absorb the heat in the high-temperature flue gas and achieve better heat exchange effect.
3. The multiple-pass economizer device of claim 2, wherein: in each economizer piping system, the economizer pipes of the pipe groups I and II are alternately communicated with the economizer header and are arranged in a straight line along the axial direction of the economizer header, so that the pipe groups I and II are connected in series, the uniform distribution of flue gas temperature is ensured, and the temperature deviation of the left side and the right side is prevented from being large to generate temperature pressure.
4. The multiple-pass economizer device of claim 3 wherein: the economizer header comprises an economizer inlet header (401), a first economizer piping I pipe group inlet header (402), a first economizer piping I pipe group outlet header (403), a first economizer piping II pipe group inlet header (404), a first economizer piping II pipe group outlet header (405), a second economizer piping I pipe group outlet header (406), a second economizer piping II pipe group inlet header (407), a second economizer piping II pipe group outlet header (408), a third economizer piping I pipe group outlet header (409), a third economizer piping II pipe group inlet header (410), a third economizer piping II pipe group outlet header (411) and an economizer outlet header (412) which are sequentially communicated according to the water flow direction; wherein the outlet header of the second pipe group of the first economizer pipe system is also the inlet header of the first pipe group of the second economizer pipe system, and the outlet header of the second pipe group of the second economizer pipe system is also the inlet header of the first pipe group of the third economizer pipe system; so as to ensure that the water supply at the inlet of the economizer is uniformly distributed in the first economizer piping system, and the water supply at the outlet of the economizer is uniformly led to the boiler barrel, thereby avoiding the bias flow of the water supply; and each economizer piping system is provided with an inlet and an outlet header to ensure that water temperature is uniformly mixed and then enters the next-stage economizer piping system.
5. The multiple-pass economizer device of claim 4 wherein:
two ends of each coal economizer in the first coal economizer piping system I pipe group are respectively communicated with a first coal economizer piping system I pipe group inlet header and a first coal economizer piping system I pipe group outlet header, two ends of each coal economizer in the first coal economizer piping system II pipe group are respectively communicated with a first coal economizer piping system II pipe group inlet header and a first coal economizer piping system II pipe group outlet header, and the first coal economizer piping system I pipe group outlet header and the first coal economizer piping system II pipe group inlet header are communicated through a connecting pipe;
two ends of each economizer pipe in the first pipe group of the second economizer pipe system are respectively communicated with an inlet header of the first pipe group of the second economizer pipe system and an outlet header of the first pipe group of the second economizer pipe system, two ends of each economizer pipe in the second pipe group of the second economizer pipe system are respectively communicated with an inlet header of the second pipe group of the second economizer pipe system and an outlet header of the second pipe group of the second economizer pipe system, and the outlet header of the first pipe group of the second economizer pipe system and the inlet header of the second pipe group of the second economizer pipe system are communicated through connecting pipes;
two ends of each coal economizer in the third coal economizer piping system I pipe group are respectively communicated with a third coal economizer piping system I pipe group inlet header and a third coal economizer piping system I pipe group outlet header, and two ends of each coal economizer in the third coal economizer piping system II pipe group are respectively communicated with a third coal economizer piping system II pipe group inlet header and a third coal economizer piping system II pipe group outlet header; the outlet header of the pipe group I of the third coal-saving device pipe system is communicated with the inlet header of the pipe group II of the third coal-saving device pipe system through a connecting pipe.
6. The multiple-pass economizer device of claim 5 wherein: the frame guard plate is a frame consisting of section steel and steel plates.
7. The multiple-pass economizer device of claim 6 wherein: i nest of tubes of first economizer piping and II nest of tubes, I nest of tubes of second economizer piping and II nest of tubes, I nest of tubes of third economizer piping and II nest of tubes are the coiled tubing, are equipped with the multirow coiled tubing to improve the heat transfer effect.
8. The multiple-pass economizer device of claim 7 wherein: the ash bucket is V-shaped, and the top of the ash bucket is fixed at the lower end of the frame guard plate; the top flat plate interconnect of adjacent ash bucket and seal the lower extreme of frame backplate, prevent that the flue gas from deviating.
9. The multiple-pass economizer device of claim 8 wherein: the ash bucket is made of steel plates so as to ensure the service life of the flue ash bucket.
10. The multiple-pass economizer device of claim 9, wherein: the top sealing layer is of a comb-shaped plate structure; so as to effectively ensure the sealing of the coal economizer pipe penetrating part at the top of the frame.
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| CN202022807326.9U CN213930895U (en) | 2020-11-27 | 2020-11-27 | Re-flow economizer device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112344316A (en) * | 2020-11-27 | 2021-02-09 | 杭州新世纪能源环保工程股份有限公司 | Re-flow economizer device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112344316A (en) * | 2020-11-27 | 2021-02-09 | 杭州新世纪能源环保工程股份有限公司 | Re-flow economizer device |
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