Steam generation system with coil pipe horizontal structure

Abstract

The utility model discloses a coil pipe horizontal structure steam generating system, which belongs to the technical field of heat exchange, and comprises a boiler body, a steam-water separator, a combustion device and a water supply device, the boiler body comprises a shell, a condenser and a heat exchanger are integrated in the shell, the condenser is positioned at the downstream of flue gas relative to the heat exchanger, the condenser comprises a condensing coil pipe, and the condensing coil pipe is arranged in the shell. The heat exchanger comprises a coil pipe device formed by sequentially connecting a finned coil pipe, a flat coil pipe and a hearth finned pipe in series, and the hearth finned pipe is coiled to form a cylindrical hearth so as to form a radiation heating surface; the condensing coil pipe, the finned coil pipe, the flat coil pipe and the hearth finned pipe are horizontally arranged, and the condensing coil pipe, the finned coil pipe and the flat coil pipe form a convection heating surface; the system is small in size, the occupied area is reduced, and the system does not belong to a special equipment directory and facilitates daily operation and development of enterprises; meanwhile, no heat loss exists in the whole water circulation process, and the purposes of saving resources and comprehensively utilizing the resources are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to heat exchange technical field especially relates to a coil horizontal structure steam generating system. BACKGROUND

[0002] At present, the traditional steam generating system usually separates the condenser and the heat exchanger, which results in large floor area and is not suitable for places with limited space. According to the provisions of the No. 1 amendment of TSG G0001-2020 "Boiler Safety Technical Regulations", boilers with a total geometric volume higher than 30 liters (the geometric volume of the pressure-bearing component steam-water space within the boiler feed water check valve outlet to the boiler steam outlet valve) belong to special equipment in the special equipment directory, which needs to be supervised according to special equipment. Although the supervision of special equipment aims to ensure safety and improve the efficiency of equipment operation, the increase of relevant processes and cost will have a certain impact on the daily operation and development of enterprises.

[0003] To this end, the present application designs a coil horizontal structure steam generating system. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a coil horizontal structure steam generating system, which aims to solve at least one of the multiple deficiencies in the above background technology.

[0005] The present application provides a coil horizontal structure steam generating system, which comprises a boiler body, a steam-water separator, a combustion device and a water supply device. The boiler body comprises a shell, which integrates a condenser and a heat exchanger. The condenser is located downstream of the flue gas relative to the heat exchanger. The condenser comprises a condensing coil. The heat exchanger comprises a coil device sequentially connected by a finned coil, a flat coil and a hearth ribbed tube. The hearth ribbed tube is coiled into a cylindrical hearth, which further forms a radiant heating surface. The combustion device is arranged on the outer wall of the shell and located on the side of the cylindrical hearth. The condensing coil, finned coil, flat coil and hearth ribbed tube are arranged horizontally. The condensing coil, finned coil and flat coil form a convection heating surface.

[0006] As a preferred scheme of the present application, the condensing coil is flat and comprises an even number of layers. Each two layers are connected in series to form a coil group. The inlet and outlet of the coil group are connected to the water supply device through the water inlet main pipe and the water outlet main pipe, respectively.

[0007] As a preferred scheme of the present application: the water supply device comprises a softened water tank and a deoxygenated water tank, the water outlet of the softened water tank is communicated with the inlet of the coil group through a water inlet main pipe, the water inlet pipe of the deoxygenated water tank is communicated with the outlet of the coil group through the water outlet main pipe, and in addition, the water outlet pipe of the deoxygenated water tank is communicated with the liquid inlet of the coil device through a water supply pump, so that the condensate water is recycled.

[0008] As a preferred scheme of the present application: the coil device and the steam-water separator form a small geometric volume steam-water heat exchange system, in which the steam inlet of the steam-water separator is communicated with the outlet of the coil device, and the liquid outlet of the steam-water separator is communicated with the deoxygenated water tank.

[0009] As a preferred scheme of the present application: the finned coil, the flat coil and the hearth finned tube are connected in sequence in the direction opposite to the flue gas, and the pipe diameters of the finned coil, the flat coil and the hearth finned tube are increased in sequence.

[0010] As a preferred scheme of the present application: the bottom of the shell is provided with a condensate water output mechanism, the condensate water output mechanism comprises a flue gas condensate water outlet and a water collecting tray, the flue gas condensate water outlet penetrates through the shell, and the water collecting tray is arranged outside the shell and connected to a blowdown opening through a total drain pipe.

[0011] As a preferred scheme of the present application: the finned coil and the hearth finned tube are made of high-pressure boiler steel pipe materials, wherein the fins of the finned coil are arranged equidistantly around the outer periphery of the mother pipe by laser welding, and the fins of the hearth finned tube are fixed to the outer periphery of the base pipe by one-time hot forming and extend along the axial direction.

[0012] As a preferred scheme of the present application: for the finned coil, the height of the fin is less than or equal to 0.4 times the outer diameter of the mother pipe, the thickness of the fin is between 0.9-1.2mm, and the spacing between adjacent two fins is greater than 3mm.

[0013] As a preferred scheme of the present application: the number of layers of the flat coil is not less than three layers connected in sequence.

[0014] As a preferred scheme of the present application: the steam-water separator is built-in with steam-water separation blades.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] The steam generation system of the structure integrates the condenser and the heat exchanger in the boiler body, so that on the one hand, the volume of the steam generation system is significantly reduced, thereby reducing the floor area, and on the other hand, the loss of heat in the boiler in the transmission process is reduced, and the overall energy efficiency of the system is improved, in addition, the geometric total volume between the coil device and the steam-water separator in the steam generation system of the structure is less than 30 liters, according to the provisions of the first modification sheet of TSG G0001-2020 Boiler Safety Technical Regulations, it is not special equipment in the special equipment directory, effectively reduces the use cost and simplifies the use procedure, is beneficial to the daily operation and development of enterprises; at the same time, there is no hot water discharge in the whole water circulation process of the steam generation system, and there is no loss of excess heat, the purpose of resource-saving comprehensive utilization is achieved, and the energy efficiency of heat energy and water resources is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A front view structural schematic diagram of the steam generation system with the coil horizontal structure is provided.

[0018] Figure 2 A front view structural schematic diagram of the horizontal layout of each coil in the shell is provided.

[0019] Figure 3 A cross-sectional view schematic diagram of the horizontal layout of each coil in the shell is provided.

[0020] Figure 4 It is a condensing coil structure schematic diagram of the application.

[0021] Figure 5 It is a finned coil structure schematic diagram of the application.

[0022] Figure 6 It is a structure schematic diagram of the flat coil of the application.

[0023] Figure 7 It is a sectional view of the furnace ribbed tube of the application.

[0024] Figure 8 It is an internal structure schematic diagram of the steam-water separator of the application.

[0025] In the attached diagram, 100 represents the boiler body; 101 represents the shell; 102 represents the condensing coil; 1021 represents the inlet main pipe; 1022 represents the outlet main pipe; 103 represents the finned coil; 1031 represents the main pipe; 1032 represents the fin; 104 represents the flat coil; 105 represents the furnace finned tube; 1051 represents the base pipe; 1052 represents the fin; 106 represents the flue gas condensate outlet; 107 represents the water collection tray; and 108 represents the plate. Piping device; 200 is steam-water separator; 201 is safety valve; 202 is steam outlet valve; 203 is drain outlet; 204 is steam inlet; 205 is liquid outlet; 206 is steam trap; 207 is steam-water separator blade; 300 is combustion device; 400 is water supply device; 401 is deaerator water tank; 402 is water inlet pipe; 403 is water outlet pipe; 404 is diaphragm pump; 405 is booster pump. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be emphasized that the following description is merely exemplary and not intended to limit the scope and application of the present invention.

[0027] like Figure 1 As shown in the figure (arrows indicate fluid flow direction), this embodiment provides a horizontal coil-type steam generation system, including a boiler body 100, a steam-water separator 200, a combustion device 300, and a feedwater device 400. The boiler body 100 includes a shell 101, which integrates a condenser and a heat exchanger. The condenser is located downstream of the heat exchanger in the flue gas configuration. The condenser includes a condensing coil 102, and the heat exchanger includes a coil assembly 108 formed by sequentially connecting finned coils 103, flat coils 104, and furnace finned tubes 105. The furnace finned tubes 105 are coiled to form a cylindrical furnace, thus creating a radiant heating surface. The combustion device 300 is installed on the outer wall of the shell 101 and located on the side of the cylindrical furnace. The condensing coil 102, finned coil 103, flat coil 104, and furnace finned tubes 105 are arranged horizontally. The condensing coil 102, finned coil 103, and flat coil 104 form a convective heating surface. It can be understood that the boiler body 100, steam-water separator 200, combustion device 300, and feedwater device 400 should be operated automatically through a unified control system.

[0028] In summary, the steam generation system of this embodiment integrates the condenser and heat exchanger within the boiler body 100. This significantly reduces the volume of the steam generation system, thereby reducing the floor space required. Furthermore, the condenser, acting as a convective heating surface, performs energy conversion, reducing heat loss during boiler transfer and improving the overall energy efficiency of the system. This solves the problem of the large floor space required by existing steam generation systems.

[0029] like Figures 2-3As shown in the figure (the arrow is the fluid flow direction), the horizontal layout structure of the coils in the shell 101 provided by the embodiment is shown; as can be seen from the figure, the condensing coil 102, the finned coil 103, the flat coil 104 and the hearth finned tube 105 are sequentially arranged in the direction opposite to the flue gas, and the pipe diameters of the finned coil 103, the flat coil 104 and the hearth finned tube 105 constituting the coil device 108 are gradually increased, which can effectively adapt to the expansion of the steam after water vaporization, reduce the flow resistance and ensure the smooth flow of the steam.

[0030] The condensing coil 102 is a mosquito coil-shaped flat coil 104, the condensing pipe contains an even number of layers, and each two layers are connected in series to form a coil group, and the inlet and outlet of the coil group are connected to the water supply device 400 through the water inlet main pipe 1021 and the water outlet main pipe 1022 respectively; the condensing pipe of the embodiment is preferably provided with six layers, and each two layers are connected in series to form three coil groups; as can be seen from the figure, Figure 1 and Figure 2 or Figure 3 It can be seen that the three coil groups are respectively provided with corresponding inlets and outlets, and the inlets and outlets of the three coil groups are communicated to the water supply device 400 through the water inlet main pipe 1021 and the water outlet main pipe 1022 respectively; it can be understood that the water supply device 400 provides water source for the whole system, so it also provides heat exchange medium for the condenser and the heat exchanger; connecting the condensing coil 102 to the water supply device 400 in the embodiment can optimize the water circulation while reducing the loss of excess energy, achieving the purpose of comprehensive utilization of resources.

[0031] As shown in the figure, Figure 4 the front view structure schematic diagram of the condensing coil 102 provided by the embodiment is shown, the condensing coil 102 is a mosquito coil-shaped flat coil 104, the pipe body is made of a light pipe, of course, the fin 1032 pipe can also be used when necessary.

[0032] The finned coil 103 and the hearth finned tube 105 are made of high-pressure boiler steel pipe material, such as Figure 5 As shown in the figure, the structure schematic diagram of the finned coil 103 provided by the embodiment is shown, the fins 1032 of the finned coil 103 are equally arranged around the outer periphery of the mother pipe 1031 by laser welding, the height of the fin 1032 is less than or equal to 0.4 times the outer diameter of the mother pipe 1031, the thickness of the fin 1032 is between 0.9-1.2mm, and the spacing between the adjacent two fins 1032 is greater than 3mm; as Figure 7 As shown in the figure, the structure schematic diagram of the hearth finned tube 105 provided by the embodiment is shown, the fins 1052 of the hearth finned tube 105 are fixed on the outer periphery of the base pipe 1051 by one-time hot forming and extend along the axial direction.

[0033] The flat coil 104 is arranged between the finned coil 103 and the hearth finned coil 105, and the flat coil 104 is preferably also a mosquito coil structure, as shown in Figure 6 The flat coil 104 has no less than three layers of coils arranged in series, and in this embodiment, the flat coil 104 has three layers of coils, and the flat coil 104 is also formed by winding a light pipe.

[0034] The water supply device 400 includes a softened water tank (not shown in the figure) and a deaerated water tank 401, wherein the softened water tank serves as a cooling water supply or replenishment source, the deaerated water tank 401 serves as a water resource recycling tank, the outlet of the softened water tank is connected to the inlet of each coil group in the condensing coil 102 through a water inlet main pipe 1021, the water inlet pipe 402 of the deaerated water tank 401 is connected to the outlet of each coil group in the condensing coil 102 through a water outlet main pipe 1022, in addition, the water outlet pipe 403 of the deaerated water tank 401 is connected to the liquid inlet of the coil device 108 through a water supply pump, thereby realizing the recycling of the condensed water; in this embodiment, the water supply pump is preferably a high-pressure water supply diaphragm pump 404, which is a combination of a booster pump 405 and a diaphragm pump 404.

[0035] Specifically, the cooling water in the softened water tank enters the condensing coil 102 through the water inlet main pipe 1021, and after heat exchange, it enters the deaerated water tank 401 through the water outlet main pipe 1022; in this embodiment, the deaerated water tank 401 is a normal-pressure deaerated water tank 401, and the softened water treated by the normal-pressure deaerated water tank 401 is again introduced into the coil device 108 of the boiler heat exchanger for heat exchange, thereby realizing the recycling of the condensed water in the heat exchanger, and further realizing the effective utilization of energy (water resources and heat energy).

[0036] The coil device 108 and the steam-water separator 200 form a small geometric volume steam-water heat exchange system, in which the steam inlet 204 of the steam-water separator 200 is connected to the outlet of the coil device 108, and the liquid outlet 205 of the steam-water separator 200 is connected to the deaerated water tank 401; specifically, the steam-water mixture output by the coil device 108 enters the steam-water separator 200, and the saturated water separated by the steam separator is again introduced into the normal-pressure deaerated water tank 401; since the saturated water also has a certain temperature, the separated saturated water can be used to heat the water in the deaerated water tank 401, thereby realizing the energy recovery efficiency and reducing energy loss, and at the same time, the water temperature in the deaerated water tank 401 for supplying water to the boiler coil device 108 can be maintained at an appropriate temperature.

[0037] In addition, the geometric total volume between the coil device 108 and the steam-water separator 200 in the steam generating system of the structure is less than 30 liters, which is not a special equipment in the special equipment directory according to the provisions of the first amendment of TSG G0001-2020 Boiler Safety Technology Regulations, effectively reducing the use cost and simplifying the use procedure, which is beneficial to the daily operation and development of enterprises.

[0038] The steam-water separator 200 is a common blade type steam-water separator 200, which is provided with a steam inlet 204 and a liquid discharge port 205, and at least a safety valve 201, a steam outlet and a blowdown port 203 valve, etc. Figure 8 As shown, the steam-water separator 200 is provided with steam-water separation blades 207, and after passing through the steam-water separation blades 207, the steam generating rotation changes the flow direction and speed of the fluid, so that the liquid is effectively separated from the steam under the action of centrifugal force and gravity, thereby improving the quality of the steam.

[0039] The bottom of the shell 101 is provided with a condensate output mechanism, which includes a flue gas condensate outlet 106 and a water collecting tray 107, the flue gas condensate outlet 106 includes two groups, which is conical and penetrates through the shell 101, and the water collecting tray 107 is arranged outside the shell 101 and connected to the blowdown port 203 through a total drain pipe, as shown in Figure 1 The flue gas condensate on the coil enters the water collecting tray 107 through the flue gas condensate outlet 106, and then is transported to the blowdown port 203 through the opening on the water collecting tray 107 and the total drain pipe, avoiding the accumulation of flue gas condensate in the boiler; the condensate output mechanism of the embodiment is preferably arranged at the position of the condensing coil 102.

[0040] The combustion device 300 uses high-temperature flue gas generated by burning gas or liquid fuel as a heat source, the gas fuel includes natural gas, liquefied petroleum gas, hydrogen and biogas, etc., the liquid fuel includes light diesel oil, methanol, etc., the combustion device 300 is installed at the outermost side of the cylindrical furnace, the flame generated by the combustion device 300 burns inside the cylindrical furnace, and the flue gas generated by combustion flows through the flat coil 104 and the finned coil 103 in turn, and finally is discharged to the atmosphere after passing through the condensing coil 102.

[0041] The specific use principle of the embodiment includes:

[0042] The softened cold water flows through the condenser to complete heat exchange through the water inlet main pipe 1021 and enters the water outlet main pipe 1022, the water outlet main pipe 1022 of the condenser is connected with the water inlet pipe 402 of the deaerated water tank 401, the water outlet pipe 403 of the deaerated water tank 401 is connected with a high-pressure water supply diaphragm pump 404, the water outlet pipe 403 of the high-pressure water supply diaphragm pump 404 is connected with the liquid inlet of the coil device 108, the circulation use of the condensed water is realized, the deaerated softened water from the deaerated water tank 401 flows through the finned coil 103, the flat coil 104 and the hearth finned tube 105 in sequence, the liquid outlet of the hearth is connected with the steam inlet 204 of the steam-water separator 200, the deaerated softened water is gradually heated and vaporized after heat exchange, the steam-water mixture formed is separated into high-dryness saturated steam after entering the steam-water separator 200, and the saturated steam is discharged to the steam-using equipment end through the steam outlet of the steam-water separator 200, and the excess saturated water returns to the atmospheric deaerated water tank 401 through the drain valve 206 arranged at the bottom of the steam-water separator 200 as a heat source for heating the softened water in the deaerated water tank 401, so that the whole steam-water heat exchange process is completed.

[0043] It can be seen that the system has small size, reduces the floor area, and does not belong to the special equipment directory, which is beneficial to the daily operation and development of enterprises; meanwhile, there is no hot water discharge and no excess heat loss in the whole water circulation process of the steam generating system, the purpose of resource-saving comprehensive utilization is achieved, and the energy efficiency of heat energy and water resources is further improved.

[0044] Therefore, the system has the advantages of small size, fast steam production, stable steam pressure, high steam quality, safety and reliability, no explosion danger, easy operation, high thermal efficiency and low energy loss, and is particularly suitable for use in the fields of medicine, washing, food, textile printing and dyeing, chemical industry and other industrial steam fields which have high requirements on steam quality, high steam pressure and stable steam pressure output.

[0045] The above is only an embodiment of the present application, and the well-known specific structures and properties in the scheme are not described in detail. It should be pointed out that, for those skilled in the art, without departing from the present application, some improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of the claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A coil horizontal structure steam generating system comprising a boiler body, a steam-water separator, a combustion device, and a feed water device, characterized by: The boiler body comprises a shell, a condenser and a heat exchanger are integrated in the shell, the condenser is located downstream of the heat exchanger relative to flue gas, the condenser comprises condensing coils, the heat exchanger comprises coil devices which are sequentially connected in series by finned coils, flat coils and hearth finned coils, the hearth finned coils are coiled to form a cylindrical hearth which further forms a radiant heating surface, the combustion device is arranged on the outer wall of the shell and located at the side of the cylindrical hearth; the condensing coils, the finned coils, the flat coils and the hearth finned coils are horizontally arranged, wherein the condensing coils, the finned coils and the flat coils form a convection heating surface.

2. The coil-on-huge steam generating system of claim 1 wherein: The condensing coils are flat and comprise an even number of layers, and each two layers form a coil group in series, and the inlet and outlet of the coil group are connected to the water supply device through the water inlet header and the water outlet header respectively.

3. The coil-on-huge steam generating system of claim 2 wherein: The water supply device comprises a softened water tank and a deaerated water tank, the water outlet of the softened water tank is communicated with the inlet of the coil group through the water inlet header, the water inlet pipe of the deaerated water tank is communicated with the outlet of the coil group through the water outlet header, and in addition, the water outlet pipe of the deaerated water tank is communicated with the liquid inlet of the coil device through the water supply pump, so as to realize the recirculation of condensate water.

4. The coil-on-huge steam generating system of claim 3 wherein: The coil device and the steam-water separator form a small geometric volume steam-water heat exchange system, in which the steam inlet of the steam-water separator is communicated with the outlet of the coil device, and the liquid outlet of the steam-water separator is communicated with the deaerated water tank.

5. The coil-on-huge steam generating system of claim 1 wherein: The finned coils, the flat coils and the hearth finned coils are sequentially connected in series against the flue gas, and the diameters of the finned coils, the flat coils and the hearth finned coils are gradually increased.

6. The coil-on-huge steam generating system of claim 1 wherein: The bottom of the shell is provided with a condensate water output mechanism, which comprises a flue gas condensate water outlet and a water collecting tray, the flue gas condensate water outlet penetrates through the shell, and the water collecting tray is arranged outside the shell and connected to the blowdown outlet through the total drain pipe.

7. The coil-on-huge steam generating system of claim 1 wherein: The finned coils and the hearth finned coils are made of high-pressure boiler steel pipe material, wherein the fins of the finned coils are equally arranged around the outer periphery of the mother pipe by laser welding, and the fins of the hearth finned coils are fixed on the outer periphery of the base pipe by one-time hot forming and extend along the axial direction.

8. The coil-on-huge steam generating system of claim 7 wherein: For the finned coils, the height of the fins is less than or equal to 0.4 times the outer diameter of the mother pipe, the thickness of the fins is between 0.9-1.2mm, and the distance between adjacent two fins is greater than 3mm.

9. The coil-on-huge steam generating system of claim 1 wherein: The number of layers of the flat coils is not less than three which are connected in series.

10. The coil-on-huge steam generating system of claim 1 wherein: The steam-water separator is built-in with steam-water separation blades.

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