CN113669712B - Steam boiler with ascending pipe and temperature equalizing plate spacing control function - Google Patents
Steam boiler with ascending pipe and temperature equalizing plate spacing control function Download PDFInfo
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- CN113669712B CN113669712B CN202111059786.0A CN202111059786A CN113669712B CN 113669712 B CN113669712 B CN 113669712B CN 202111059786 A CN202111059786 A CN 202111059786A CN 113669712 B CN113669712 B CN 113669712B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
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Abstract
The invention provides a steam boiler with a temperature-equalizing plate interval controlled by a rising pipe, wherein an acute angle formed by a first straight line wall and an inner wall is smaller than an acute angle formed by a second straight line wall and the inner wall, the first straight line wall and the second straight line wall extend towards the flow direction of fluid, and the intersection point of the first straight line wall and the second straight line wall is positioned at the upper part of the connection part of the first straight line wall and the inner wall and is positioned at the upper part of the connection part of the second straight line wall and the inner wall. The shape of the temperature equalizing plate is formed by rotating the first straight wall, the second straight wall and the inner wall along the axis of the ascending pipe. Through the arrangement of the temperature equalizing plate in the ascending pipe, one part of fluid flows along the temperature equalizing plate and is guided to the opposite direction, and the fluid is fully mixed with the fluid entering from the opposite direction, so that the temperature of the fluid is uniform, the further temperature uniformity is realized, and the service life of a product is prolonged.
Description
Technical Field
The invention relates to a project which entrusts colleges and universities to research and develop. The invention belongs to the field of steam generation, and particularly relates to a steam boiler, belonging to the field of IPC classification number F22.
Background
The circuit that receives heat from the furnace and moves the fluid from the low level to the high level is called the "uptake circuit", while the circuit that receives heat and moves the fluid from the high level to the low level is called the "descent circuit". A circuit consists of a pipe or a set of pipes leading from a common point, such as a header or a steam drum, terminating at a common point, also such as a header or a drum.
In most natural circulation boiler designs, the heated tubes that make up the evaporator section are typically supplied with fluid flowing upward, but in multi-boiler boilers, the falling tubes of the evaporator tube bundle are not. In this type of boiler, the descending heated tubes provide the entire circulation flow of the riser in the furnace and in the evaporator tube bundle section.
On the one hand, the fluid in the ascending pipe is generally in a vapor-liquid two-phase flow in an upward process, so that the fluid in the ascending pipe is a vapor-liquid mixture, and the existence of the vapor-liquid two-phase flow influences the heat absorption efficiency of the ascending pipe.
The riser is because each part is heated unevenly, for example the side that is close to the furnace is high temperature, and the side that back to the furnace is low temperature, for the temperature of the fluid of different positions in the riser is different, because the temperature difference can lead to the temperature in the riser inhomogeneous and lead to appearing the condition of either overheat or subcooling, causes the influence to the operation.
The invention is improved based on the previous invention, and provides a new steam boiler, thereby solving the problem of uneven riser fluid temperature.
Disclosure of Invention
The present invention provides a new steam boiler, thereby solving the technical problems occurring in the prior art.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a steam boiler comprises an upper drum, a lower drum, and an ascending pipe and a descending pipe which are connected between the upper drum and the lower drum, and is characterized in that a temperature equalizing plate extending from the inner wall of the ascending pipe to the center of the ascending pipe is arranged in the ascending pipe, the temperature equalizing plate comprises a first linear wall and a second linear wall which extend from the inner wall, wherein the acute angle formed by the first linear wall and the inner wall is smaller than the acute angle formed by the second linear wall and the inner wall, the first linear wall and the second linear wall extend towards the flowing direction of fluid, the intersection point of the first linear wall and the second linear wall is positioned at the upper part of the joint of the first linear wall and the inner wall, and is positioned at the upper part of the joint of the second linear wall and the inner wall. The shape of the temperature equalizing plate is formed by rotating the first straight wall, the second straight wall and the inner wall along the axis of the ascending pipe.
Preferably, the first rectilinear wall forms an angle of 30-60 with the axis of the riser pipe at the point of intersection.
Preferably, the total radian of the circular arc connecting the uniform temperature plate and the inner wall in the same layer is 150-180 degrees.
A steam boiler comprises an upper drum, a lower drum, and an ascending pipe and a descending pipe which are connected between the upper drum and the lower drum, wherein a temperature equalizing plate extending from the inner wall of the ascending pipe to the center of the ascending pipe is arranged in the ascending pipe, the temperature equalizing plate comprises a first straight line wall and a second straight line wall which extend from the inner wall, the first straight line wall and the second straight line wall extend towards the flowing direction of fluid, a plurality of temperature equalizing plates are arranged on the inner wall of the ascending pipe along the height direction, the intersection point is a vertical point on the inner wall, the line formed by the intersection point and the vertical point is a third line, the distance between the connection point of the first straight line wall and the inner wall and the vertical point is H, the inner diameter of the ascending pipe is R, and the distance S is designed in the following mode:
S>=a*H+b*((H)2+R2)(1/2)；
therein 2.38<a<3.18,
，1.432<c<1.443。
Preferably, a =2.78 and c = 1.437.
The first straight line wall and the inner wall form an acute angle smaller than that of the second straight line wall, the first straight line wall and the second straight line wall extend towards the flowing direction of the fluid, and the intersection point of the first wall straight line and the second straight line wall is positioned at the upper part of the connection part of the first straight line wall and the inner wall and is positioned at the upper part of the connection part of the second straight line wall and the inner wall. The shape of the temperature equalizing plate is formed by rotating the first straight wall, the second straight wall and the inner wall along the axis of the ascending pipe.
Preferably, the first rectilinear wall forms an angle of 30-60 with the axis of the riser pipe at the point of intersection.
Preferably, the total radian of the circular arc connecting the uniform temperature plate and the inner wall in the same layer is 150-180 degrees.
Compared with the prior art, the invention has the following advantages:
1) the invention provides a novel steam boiler, wherein a linear temperature-equalizing plate is arranged in a rising pipe, so that a part of fluid flows along the temperature-equalizing plate and is guided to the opposite direction, and the fluid entering the rising pipe in the opposite direction is fully mixed with the fluid entering the rising pipe in the opposite direction, so that the temperature of the fluid is uniform, the further temperature uniformity is realized, and the service life of a product is prolonged.
2) According to the invention, the distance of the temperature-equalizing plate is widely researched, a formula of the minimum distance is designed, the temperature-equalizing mixing requirement is fully met, the problems of uneven mixing and increased flow resistance are avoided, and the optimal outlet fluid temperature-equalizing effect is achieved.
3) According to the invention, through carrying out extensive research on the heat exchange rule caused by the change of each parameter of the temperature equalizing plate, the temperature equalizing plate structure of the heat exchanger is optimized under the condition of meeting the flow resistance, so that the optimal outlet fluid temperature equalizing effect is achieved.
4) According to the invention, through reasonable layout, the temperature equalizing plates of adjacent rows are arranged in a staggered manner, so that fluid is further fully mixed, and the temperature is uniform.
5) The invention further promotes the full mixing by setting the distribution change of parameters such as the size, the number angle and the like of the temperature equalizing plate along the flowing direction of the fluid.
Drawings
FIG. 1 is a schematic view of the construction of a steam boiler according to the present invention.
FIG. 2 is a schematic view of another embodiment of the steam boiler structure of the present invention.
FIG. 3 is an axial sectional view of the temperature equalization plate installed on the rising pipe according to the present invention.
FIG. 4 is a schematic size view of a riser pipe with temperature equalization plates according to the present invention.
Fig. 5 is a schematic perspective view of 1 temperature equalization plate per layer.
Fig. 6 is a schematic perspective view of 3 temperature equalization plates disposed in each layer.
Fig. 7 is a schematic perspective view of 1 vapor chamber per layer.
Fig. 8 is an exploded perspective view of the riser of fig. 7.
In the figure: 1. the device comprises an upper boiler barrel, a lower boiler barrel, a riser, a temperature equalizing plate 5, a downcomer 6, a lower boiler barrel 7, a riser 8, a riser 9, a hearth combustion chamber 10, an outlet header 11 and a flue 12, wherein the upper boiler barrel is arranged in the upper boiler barrel; 41 first rectilinear wall, 42 second rectilinear wall, 43.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
In this document, "/" denotes division and "×", "denotes multiplication, referring to formulas, if not specifically stated.
A steam boiler as described in fig. 1, comprising an upper drum 1 and a lower drum 2, said upcomers 3 and downcomers 5 connecting the upper drum 1 and the lower drum 2. Water enters the downcomer 5 from the upper drum 1. The water flows down in the downcomer and is collected in the lower drum 2. The rising pipes 3 of the boiler are heated by the combustion of fuel in the furnace combustion chamber 10. The heat absorbed by the rising pipe 3 boils the liquid inside the pipe, thereby creating a two-phase mixture of water and steam. The two-phase mixture in the riser 3 reaches the upper drum 1. Subcooled liquid discharged from a water supply pipe (not shown) in the upper drum 1 and saturated liquid discharged from the separation device are mixed together to form subcooled liquid, and the subcooled liquid flows out of the upper drum 1 into the downcomer 5, and a flow cycle is completed according to such a flow.
A steam boiler according to another embodiment, further illustrated in fig. 2, comprises an upper drum 1 and a lower drum 2, said upcomers 3 and downcomers 5 connecting the upper drum 1 and the lower drum 2. From the upper drum 1, the water enters the downcomer 5 of the heated evaporator tube bundle in the furnace inner flue 12. The water flows down in the downcomer and is collected in the lower drum 2. The temperature of the water entering the lower drum 2 increases as the downcomer 5 absorbs heat. Depending on how much heat is absorbed, the water in the lower drum 2 may be subcooled or saturated. A portion of the fluid (typically steam-water mixture) leaving the lower drum 2 flows upwards into the riser tubes 3 of the evaporator tube bundle. The liquid flowing upwards into the riser 3 absorbs heat and enters the upper drum 1.
A portion of the fluid leaving the lower drum 2 reaches the lower drum 7 of the furnace through the downcomer 6. The liquid entering a lower drum 7 is distributed to the furnace tubes 8 connected to the lower drum 7. The furnace tubes are heated by the combustion of fuel in the furnace firebox 10. The heat absorbed by the furnace tubes 8 causes the liquid in the furnace tubes 8 to boil, thereby producing a two-phase mixture of water and steam. The two-phase mixture in the furnace tube 8 reaches the upper drum 1 through the furnace tube 8 directly connected with the upper drum 1, the furnace tube 8 at the moment is also an ascending tube, or an outlet header 11 is arranged between the lower drum 7 and the upper drum 1, and the two-phase mixture is conveyed to the upper drum 1 from the outlet header 11 of the hearth loop through the middle ascending tube 9. An internal separation device in the upper drum 1 separates the two-phase mixture into steam and water. Subcooled liquid is formed by mixing subcooled liquid discharged from a water supply pipe (not shown) in the upper drum 1 with saturated liquid discharged from the separation device, and the subcooled liquid flows out of the upper drum 1 into the downcomer 5, completing a flow cycle according to this flow.
For the boiler steam boiler evaporator tube bundle, the furnace wall of the furnace and the furnace wall of the furnace selected to be subjected to the scouring of the combustion gas stream, it is desirable to ensure a critical heat input so that the fluid flows sufficiently upwardly in all the tubes in the tube bundle and furnace wall circuit without flow instabilities.
As a modification, as shown in FIG. 3, a temperature-equalizing plate 4 extending from an inner wall 51 of the rising pipe to the center of the rising pipe is arranged in the rising pipe 3 and/or the rising pipe 8 and/or the rising pipe 9, the temperature-equalizing plate 4 comprises a first straight wall 41 and a second straight wall 42 extending from the inner wall, wherein the acute angle formed by the first straight wall 41 and the inner wall is smaller than the acute angle formed by the second straight wall 42 and the inner wall, the first straight wall 41 and the second straight wall 42 extend in the fluid flow direction, and the intersection point 43 of the first straight wall 41 and the second straight wall 42 is located downstream of the junction of the first straight wall 41 and the inner wall 51 and downstream of the junction of the second straight wall 42 and the inner wall. The shape of the temperature equalization plate 4 is a shape formed by rotating the first and second linear walls 41 and 42 and the inner wall along the riser axis.
The invention provides a method for realizing uniform temperature of fluid by arranging the temperature equalizing plate in the ascending pipe, so that a part of fluid flows along the temperature equalizing plate and is guided to the opposite direction, and the fluid is fully mixed with the fluid entering in the opposite direction, thereby realizing the requirement of further heat exchange and prolonging the service life of a product. And through setting up the second straight line wall, the gradient of second straight line wall is little moreover for fluid that the opposite direction water conservancy diversion came over also can be along the rotatory motion of second straight line wall direction, increases the buffering, reduces flow resistance.
The temperature-equalizing plate is provided with the first linear wall and the second linear wall respectively, the two linear walls are arranged, so that the fluid disturbance effect is better, the area of the temperature-equalizing plate contacting the inner wall is increased, and the stability is improved.
The later-mentioned rising pipes are all at least one of the rising pipe 3, the rising pipe 8, and the rising pipe 9.
Preferably, the first rectilinear wall 41 at the location of the intersection point 43 forms an angle of 30-60, preferably 45, with the axis of the riser pipe. By providing this angle, fluid can be quickly directed to the opposite downstream location, and flow resistance can be further reduced.
Preferably, as shown in fig. 3, a plurality of temperature-equalizing plates 4 are provided on the inner wall of the riser in the height direction, and the temperature-equalizing plates of adjacent layers are staggered. Through the staggered distribution of the temperature equalizing plates in the adjacent rows, the fluids can fully move to opposite positions mutually in the ascending pipe, and the full and uniform mixing is ensured. For example, fig. 3, 5, and 7 show one block per layer of vapor chamber, which has a total arc of 150 and 180 degrees. Of course, multiple temperature equalization plates can be arranged on each layer, for example, three plates are arranged on each layer in the figure 6, and the total arc is 150 and 180 degrees.
Preferably, the distance between the intersection point and the inner wall of the riser is 0.3 to 0.5 times, preferably 0.4 times the diameter of the riser. With this arrangement, the air has less flow resistance on thorough mixing.
Preferably, the length of the first rectilinear wall is greater than the length of the second rectilinear wall.
Preferably, the total radian of the circular arc connecting the uniform temperature plate and the inner wall in the same layer is 150-180 degrees. This parameter set ensures thorough mixing while meeting the resistance requirements. For example, fig. 2 shows that one is provided for each layer of the vapor chamber, and the total arc of the one is 150 and 180 degrees. Of course, each layer of the temperature-uniforming plate can be provided with a plurality of blocks, for example, 3 blocks with a total arc of 150 and 180 degrees are provided.
Preferably, the temperature-equalizing plates on the layer A are arranged in a plurality of blocks, intervals are arranged among the temperature-equalizing plates on the layer A, the temperature-equalizing plates on the layer A are arranged at equal intervals, the layer B is an adjacent layer of the layer A, and the temperature-equalizing plates on the layer B are arranged at the intervals of the layer A when viewed from the flowing direction. Through the complementation of the positions of the temperature equalizing plates of the adjacent layers, the fluids can fully move to the opposite positions mutually in the ascending pipe, and the full and uniform mixing is ensured. It should be noted that, here, the layer a and the layer B are not specifically specified, A, B is only used as a distinction and is used as an adjacent layer.
Preferably, a plurality of temperature equalization plates are provided on the inner wall of the rising pipe along the height direction, and the distribution density of the temperature equalization plates becomes smaller along the height direction. Because the mixing degree of the fluid is better and better along with the continuous movement of the fluid, the distribution density is required to be smaller and smaller so as to reduce the flow resistance, and the temperature equalizing effect achieves the basically same effect on the aspects of reduced resistance and material cost saving.
Preferably, the distribution density of the temperature equalization plates is increased in a smaller and smaller range along the height direction. The effect is obtained through a large number of numerical simulation and experimental research results, and the research finds that the rule accords with the rule of fluid motion, and the temperature equalizing effect achieves the basically same effect on the aspects of further reduction of resistance and saving of material cost.
Preferably, a plurality of temperature equalizing plates are provided on the inner wall of the rising pipe along the height direction, and the size of the temperature equalizing plates becomes smaller along the height direction. Because the mixing degree of the fluid is better and better along with the continuous movement of the fluid, the size is required to be smaller and smaller to reduce the flow resistance, and the temperature equalizing effect achieves the same effect in the aspects of reducing the resistance and saving the material cost.
Preferably, a plurality of temperature equalization plates are provided on the inner wall of the rising pipe along the height direction, and the size of the temperature equalization plates is gradually reduced along the height direction. The effect is obtained through a large number of numerical simulation and experimental research results, and the research finds that the rule accords with the rule of fluid motion, and the temperature equalizing effect achieves the basically same effect on the aspects of further reduction of resistance and saving of material cost.
Through a large amount of numerical simulation and experimental research discovery, the angle and the size of samming board have very big influence to heat transfer and misce bene, samming board and inner wall contained angle are littleer, can lead to the mixed effect variation, and lead to the samming board oversize, influence the flow resistance, the contained angle is bigger than normal, it is not good to lead to stirring the fluid effect, the resistance grow, the mixed effect variation, the interval of samming board is too big, can lead to the vortex effect not good, the interval undersize can lead to increasing the movement resistance, therefore this application has obtained nearest samming board structure size optimization relation through a large amount of data simulation and experiments.
Preferably, the length L2 of the first straight wall and the length L1 of the second straight wall, the acute angle between the first line and the inner wall is a2, the acute angle between the second line and the inner wall is a1, the distance S between the centers of the adjacent temperature-uniforming plates in the fluid flowing direction is the distance between the centers of the adjacent temperature-uniforming plates, and the center is the midpoint of the connecting line of the connecting points of the first straight wall, the second straight wall and the inner wall, and the following requirements are met:
n = a-b × ln (M), wherein N = (L1+ L2)/S, M = sin (a2)/sin (a 1); ln is a function of the logarithm of the number,
0.3218<a<0.3230，0.1284<b<0.1286；
preferably, 0.25< M <0.75,0.34< N <0.44,45< a1<75 °, 15< a2<65 °,350< S <500mm, 70< L2<130mm, 30< L1<90 mm.
The optimal design requirements of the structure of the temperature equalization plate can be met by the above formulas. The structural optimization formula is a main improvement point of the invention, is the most optimized formula which is researched by a large number of numerical simulations and experiments, and is not common knowledge in the field.
Further preferably, a =0.3219 and b = 0.1285.
Preferably, in the case that the included angle formed by the ascending pipe and the horizontal plane is A, the data can be corrected by increasing a correction coefficient c, that is, the data can be corrected by increasing the correction coefficient c
c* N=a-b*Ln(M)；c=1/sin(A)mWherein 0.09<m<0.11, preferably m = 0.10.
20 < a <80, preferably 40-60.
In data simulation and experiments, the fact that the distance between the temperature equalizing plates must be larger than a certain distance, otherwise, fluid can be guided to the opposite direction through the previous temperature equalizing plate, if the distance between the temperature equalizing plates is too small, the fluid can flow in the opposite direction, the whole pipeline is not fully filled, the temperature equalizing plates are arranged at the moment, the mixing effect cannot be achieved, the temperature equalizing plates only play a role of a baffle plate, the mixing is not guided, and only the flow resistance can be increased. Therefore, the design scheme of the minimum distance of the temperature-equalizing plate is provided through a large amount of research, and the design of the temperature-equalizing plate has certain guiding significance.
The vertical point of the intersection point 43 on the inner wall, the line formed by the intersection point and the vertical point is a third line, the distance between the connecting point of the first straight line wall and the inner wall and the vertical point is H, the inner pipe diameter of the ascending pipe is R, and the distance S is designed in the following mode:
S>=a*H+b*((H)2+R2)(1/2)；
therein 2.38<a<3.18,
，1.432<c<1.443，
Preferably, a =2.78, c = 1.437;
according to the invention, through a large number of experiments and numerical simulation, the minimum design distance of the temperature-uniforming plate is obtained, and the resistance is reduced through the design distance, and meanwhile, the full mixing can be realized.
Preferably, in the case that the included angle formed by the ascending pipe and the horizontal plane is A, the data can be corrected by increasing a correction coefficient d, that is, the data can be corrected by
S/d>=a*H+b*((H)2+R2)(1/2)；d=sin(A)nWherein 0.093<n<0.105, preferably n = 0.099.
Preferably, the pipe diameter of the rising pipe 3 is continuously increased in the direction of fluid flow. The main reasons are as follows: 1) by increasing the pipe diameter of the ascending pipe, the flowing resistance can be reduced, so that the vapor evaporated in the ascending pipe continuously moves towards the direction of increasing the pipe diameter, and the circulating flow of the loop heat pipe is further promoted. 2) Because the liquid is continuously evaporated in the ascending pipe along with the continuous flowing of the fluid, the volume of the steam is larger and larger, and the pressure is also larger and larger, the change of the volume and the pressure of the steam which are continuously increased is met by increasing the pipe diameter, and the pressure is uniformly distributed on the whole. 3) By increasing the pipe diameter of the ascending pipe, the impact phenomenon caused by the increase of the volume of the steam outlet can be reduced.
Preferably, the pipe diameter of the rising pipe 3 is continuously increased with an increasing magnitude along the direction of fluid flow. The amplitude change of the pipe diameter is a result obtained by a large number of experiments and numerical simulation by the applicant, and through the arrangement, the circulating flow of the loop heat pipe can be further promoted, the pressure is integrally uniform, and the impact phenomenon is reduced.
Preferably, the pipe diameter of the ascending pipe is larger than that of the descending pipe. The resistance of the descending pipe is mainly increased, and the resistance of the ascending pipe is reduced, so that steam flows from the evaporation part more easily, and the loop heat pipe forms circulation better.
Preferably, the diameter of the downcomer decreases continuously in the direction of fluid flow. The main reasons are as follows: 1) because steam is continuously condensed in the descending pipe along with the continuous flowing of the fluid, the volume of the fluid is smaller and smaller, and the pressure is also smaller and smaller, the continuously increased volume and pressure changes of the fluid are met by reducing the pipe diameter, so that the pressure distribution is uniform on the whole, and the heat exchange is uniform. 2) Through the reduction of the pipe diameter of the heat absorption pipe, materials can be saved, and the cost is reduced.
Preferably, the pipe diameter of the downcomer is continuously reduced to a greater and greater extent in the direction of fluid flow. The amplitude change of the pipe diameter is a result obtained by a large number of experiments and numerical simulation, and by means of the arrangement, the circulating flow of the loop heat pipe can be further promoted, and the pressure is integrally uniform.
Although the present invention has been described with reference to the preferred embodiments, it is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (3)
1. A steam boiler with density control of a temperature-equalizing plate of a rising pipe comprises an upper drum, a lower drum, and a rising pipe and a descending pipe which are connected between the upper drum and the lower drum, and is characterized in that the temperature-equalizing plate extending from the inner wall of the rising pipe to the center of the rising pipe is arranged in the rising pipe, the temperature-equalizing plate comprises a first straight wall and a second straight wall which extend from the inner wall, wherein the acute angle formed by the first straight wall and the inner wall is smaller than the acute angle formed by the second straight wall and the inner wall, the first straight wall and the second straight wall extend towards the flowing direction of fluid, the intersection point of the first straight wall and the second straight wall is positioned at the upper part of the joint of the first straight wall and the inner wall and is positioned at the upper part of the joint of the second straight wall and the inner wall, and the shape of the temperature-equalizing plate is the shape formed by the first straight wall, the second straight wall and the inner wall rotating along the axis of the rising pipe; along the direction of height, the riser inner wall sets up a plurality of temperature-uniforming plates, and along the direction of height, the distribution density of temperature-uniforming plate is littleer and more.
2. A steam boiler according to claim 1, characterized in that the first rectilinear wall forms an angle of 30-60 ° with the axis of the riser at the point of intersection.
3. A steam boiler according to claim 1, characterized in that the total arc of the arcs connecting the temperature-uniforming plates and the inner wall of the same layer is 150-180 °.
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|---|---|---|---|---|
| GB900474A (en) * | 1958-12-18 | 1962-07-04 | Wagner Hochdruck Dampfturbinen | Improved oil-fired water-tube boiler |
| US4982703A (en) * | 1989-10-17 | 1991-01-08 | The Babcock & Wilcox Company | Upflow/downflow heated tube circulating system |
| CN107062187A (en) * | 2017-04-21 | 2017-08-18 | 青岛金玉大商贸有限公司 | A kind of steam boiler of through hole diameter change |
| CN107143838A (en) * | 2017-04-18 | 2017-09-08 | 青岛金玉大商贸有限公司 | A kind of constant-current stabilizer steam boiler |
| CN210291810U (en) * | 2019-07-22 | 2020-04-10 | 房长山 | Steam waste heat boiler of cement kiln |
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2021
- 2021-09-10 CN CN202111059786.0A patent/CN113669712B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB900474A (en) * | 1958-12-18 | 1962-07-04 | Wagner Hochdruck Dampfturbinen | Improved oil-fired water-tube boiler |
| US4982703A (en) * | 1989-10-17 | 1991-01-08 | The Babcock & Wilcox Company | Upflow/downflow heated tube circulating system |
| CN1051076A (en) * | 1989-10-17 | 1991-05-01 | 巴布考克和威尔科斯公司 | Rise or downflow heated tube circulating system |
| CN107143838A (en) * | 2017-04-18 | 2017-09-08 | 青岛金玉大商贸有限公司 | A kind of constant-current stabilizer steam boiler |
| CN107062187A (en) * | 2017-04-21 | 2017-08-18 | 青岛金玉大商贸有限公司 | A kind of steam boiler of through hole diameter change |
| CN210291810U (en) * | 2019-07-22 | 2020-04-10 | 房长山 | Steam waste heat boiler of cement kiln |
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