Steam generator for preparing dry steam

Abstract

The utility model relates to the technical field of steam production, and discloses a steam generator for producing dry steam, which is characterized in that a water channel is arranged in a first-stage thick film heating pipe, and the first-stage thick film heating pipe heats water flowing into the water channel into wet steam; a steam channel is arranged in the second-stage thick film heating pipe, and the second-stage thick film heating pipe heats wet steam conveyed by the water channel into dry steam. The first-stage thick film heating pipe and the second-stage thick film heating pipe are of an integrated connection structure. According to the steam generator, the first-stage thick film heating pipe and the second-stage thick film heating pipe are integrated into an integrally-connected structure, and a water-steam separator does not need to be additionally connected, so that all components of the steam generator for preparing dry steam are relatively concentrated, and the size is relatively small; and the advantages of high power density, high heating speed, high working temperature, high temperature rise rate, high mechanical strength, small size, convenience in installation, uniformity in heating, long service life, energy conservation, environment friendliness and the like of the thick film heating bodies forming the first-stage thick film heating tube and the second-stage thick film heating tube are fully utilized.

Description

Technical Field

[0001] The utility model relates to the technical field of steam production, in particular to a steam generator for producing dry steam. Background Art

[0002] Existing steam generators often use boilers to boil water to generate wet steam, or utilize zinc alloy heaters or pipe-type heaters to boil water to generate wet steam. These steam generators typically require additional water vapor separators to further process the wet steam to produce large quantities of dry steam. These dry steam production methods require at least a heating device and a water vapor separator, resulting in a relatively dispersed, bulky, and costly dry steam production equipment. Utility Model Content

[0003] In view of this, the utility model provides a steam generator for producing dry steam to solve the problems that the existing equipment for producing dry steam is relatively scattered in composition, large in size and high in cost.

[0004] The utility model provides a steam generator for producing dry steam, comprising:

[0005] A first-level thick-film heating tube having a water channel therein, wherein the first-level thick-film heating tube is adapted to heat water flowing into the water channel into wet steam;

[0006] The secondary thick film heating tube has a steam channel inside, and the steam channel is connected to the water channel. The secondary thick film heating tube is suitable for heating the wet steam transported by the water channel into dry steam; the primary thick film heating tube and the secondary thick film heating tube are an integrally connected structure. Beneficial effect: The present application adopts the above technical solution, by integrating the primary thick film heating tube and the secondary thick film heating tube into an integrally connected structure, without the need for an additional water vapor separator, which not only makes the various components of the steam generator for producing dry steam more concentrated, smaller in size, and lower in cost. At the same time, it fully utilizes the many advantages of the thick film heating element that constitutes the primary thick film heating tube and the secondary thick film heating tube itself, such as high power density, fast heating speed, high operating temperature, fast heating rate, high mechanical strength, small size, easy installation, uniform heating, long life, energy saving and environmental protection.

[0007] Optionally, it also includes:

[0008] a first temperature sensor, disposed on the surface of the first-level thick-film heating tube, and adapted to obtain the surface temperature of the first-level thick-film heating tube;

[0009] a second temperature sensor, disposed near an outlet of the steam channel, the second temperature sensor being adapted to obtain a temperature at the outlet of the steam channel;

[0010] The controller is signal-connected to the first temperature sensor, the second temperature sensor, the first thick-film heating tube, and the second thick-film heating tube. Advantageous Effects: The present application employs the above-described technical solution, which allows the controller to obtain the temperature of the first temperature sensor in real time, thereby controlling the heating power of the first thick-film heating tube to produce wet steam; and also allows the controller to obtain the temperature of the second temperature sensor in real time, thereby controlling the heating power of the second thick-film heating tube to produce dry steam with adjustable and controllable temperature.

[0011] Optionally, it also includes:

[0012] The power water supply component is connected to the controller signal. Beneficial effect: The application adopts the above technical solution, which can not only improve the water supply efficiency of the waterway, but also timely adjust the water supply amount through the controller combined with the first temperature sensor to obtain wet steam with stable and reliable temperature.

[0013] Advantageous Effects: This application adopts the above technical solution to allow water or wet steam to flow along the wall of the first-level thick-film heating tube, thereby increasing the flow time of water in the water channel to fully heat the water in the water channel and achieve extremely high thermal efficiency.

[0014] Optionally, the pitch of the spiral water channel gradually decreases along the direction of water flow. Beneficial Effect: This application adopts the above technical solution to fully utilize the temperature difference of water along the flow direction, fully heat the low-temperature water, accelerate the flow of high-temperature wet steam, and improve the efficiency of wet steam production overall.

[0015] Optionally, the steam channel is a straight channel.

[0016] Optionally, the power water supply component is a water pump.

[0017] Optionally, both the first temperature sensor and the second temperature sensor are NTC temperature sensors.

[0018] Optionally, it also includes:

[0019] The reflux structure is provided in the steam channel and is suitable for returning the condensed water after the dry steam is cooled to the water channel. Beneficial Effect: This application adopts the above technical solution to recycle the condensed water after the dry steam is cooled, saving water resources and reducing costs.

[0020] Optionally, the reflux structure is provided with a conical wall surface. Beneficial effect: The present application adopts the above technical solution to increase the contact area between the dry steam and the reflux structure, thereby improving the recovery efficiency of the condensed water. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic structural diagram of a steam generator for producing dry steam provided in an embodiment of the present utility model;

[0023] Figure 2 This is a schematic cross-sectional view of a steam generator for producing dry steam provided in an embodiment of the present utility model;

[0024] Figure 3 This is a schematic diagram of the principle of a steam generator for producing dry steam provided in an embodiment of the present utility model.

[0025] Description of reference numerals:

[0026] 1. First-level thick-film heating tube; 2. Second-level thick-film heating tube; 3. First temperature sensor; 4. Second temperature sensor; 5. Controller; 6. Spiral water channel; 7. Straight channel; 8. Water pump; 9. Reflux structure. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0028] like Figures 1 to 3 A specific embodiment of a steam generator for producing dry steam is shown, comprising: a first-stage thick-film heating tube 1, a second-stage thick-film heating tube 2, a first temperature sensor 3, a second temperature sensor 4, a controller 5, a power water supply component, and a reflux structure 9. Specifically, the power water supply component is a water pump 8, which can be a high-pressure water pump. Both the first temperature sensor 3 and the second temperature sensor 4 are NTC temperature sensors. The steam generator for producing dry steam described in this application can be widely used in applications such as household appliances and industrial equipment that require dry steam.

[0029] like Figure 1 and Figure 3As shown, the first-level thick film heating tube 1 is provided with a water channel inside; specifically, as Figure 2 As shown, the water channel is a spiral water channel 6; further, the pitch of the spiral water channel 6 gradually decreases along the direction of water flow. The first-level thick film heating tube 1 is suitable for heating the water flowing into the water channel into wet steam. The second-level thick film heating tube 2 is provided with a steam channel inside, specifically, as shown in FIG. Figure 2 As shown, the steam channel is a straight channel 7. The steam channel is connected to the water channel, and the secondary thick film heating tube 2 is suitable for heating the wet steam transported by the water channel into dry steam; the dry steam can be high-temperature dry steam. The primary thick film heating tube 1 and the secondary thick film heating tube 2 are an integrally connected structure. The first temperature sensor 3 is arranged in contact with the surface of the primary thick film heating tube 1, and the first temperature sensor 3 is suitable for obtaining the surface temperature of the primary thick film heating tube 1. The second temperature sensor 4 is arranged near the outlet of the steam channel, and the second temperature sensor 4 is suitable for obtaining the temperature at the outlet of the steam channel. The controller 5 is signal-connected to the first temperature sensor 3, the second temperature sensor 4, the primary thick film heating tube 1, the secondary thick film heating tube 2, and the power water supply component.

[0030] The specific control process of the controller 5 is briefly described as follows:

[0031] For the first-level thick-film heating tube 1, the first temperature setting value for water boiling and the maximum temperature threshold that the first-level thick-film heating tube 1 can be set in advance through the controller 5; when the temperature monitored by the first temperature sensor 3 is lower than the first temperature setting value, the first temperature sensor 3 feeds back the temperature signal to the controller 5 to control the power water supply component, reduce the water intake, and increase the power of the first-level thick-film heating tube 1 to increase the heat generation; when the temperature monitored by the first temperature sensor 3 is higher than the first temperature setting value, the first temperature sensor 3 feeds back the temperature signal to the controller 5 to control the power water supply component, increase the water intake, and reduce the power of the first-level thick-film heating tube 1 to reduce the heat generation. In addition, when the temperature monitored by the first temperature sensor 3 reaches the maximum temperature threshold that the first-level thick-film heating tube 1 can withstand, the first temperature sensor 3 feeds back the temperature signal to the controller 5 to stop the heating of the first-level thick-film heating tube 1.

[0032] For the secondary thick-film heating tube 2, a second temperature setting value that the dry steam needs to reach can be set in advance through the controller 5. When the temperature monitored by the second temperature sensor 4 is lower than the second temperature setting value, the second temperature sensor 4 feeds back a temperature signal to the controller 5 to increase the power of the secondary thick-film heating tube 2 and increase the heat generation; when the temperature monitored by the second temperature sensor 4 is higher than the second temperature setting value, the second temperature sensor 4 feeds back a temperature signal to the controller 5 to reduce the power of the secondary thick-film heating tube 2 and reduce the heat generation.

[0033] like Figure 2 As shown, the reflux structure 9 is provided in the steam channel, and is suitable for returning the condensed water after the dry steam is cooled to the water channel. Furthermore, the reflux structure 9 is provided with a tapered wall surface.

[0034] The heating elements of the first-level thick film heating tube 1 and the second-level thick film heating tube 2 described in this application are thick film heating elements. Among them, thick film refers to a film layer with a thickness of tens to hundreds of microns formed on a substrate by printing and sintering technology; the material used to make the above film layer is called a thick film material; the film layer formed by printing and sintering is a thick film circuit. When current passes through the thick film circuit, due to the resistance of the thick film circuit, the electrical energy will be converted into thermal energy, causing the temperature of the thick film surface to rise, thereby achieving the purpose of heating water. Thick film heating elements have many advantages such as high power density, fast heating speed, high operating temperature, fast heating rate, high mechanical strength, small size, easy installation, uniform heating, long life, energy saving and environmental protection.

[0035] The working process of the steam generator for producing dry steam described in this application is briefly described as follows: the first-level thick-film heating tube 1 heats the high-pressure, low-flow, room-temperature water pumped in by the high-pressure water pump to boiling, generating wet steam. Through the structure of the spiral water channel 6 and the pressure of the water pump 8, the water is heated in the front section of the first-level thick-film heating tube 1, and the wet steam flows in the rear section of the first-level thick-film heating tube 1. The water to be heated does not rise to the rear section of the first-level thick-film heating tube 1. The interior of the linear channel 7 is filled with wet steam. After being heated by the second-level thick-film heating tube 2, high-pressure dry steam is formed. The dry steam is discharged from the outlet above the linear channel 7, and the condensed water flows back into the spiral water channel 6. At the same time, the second-level thick-film heating tube 2 can also increase the temperature of the dry steam through continuous heating.

[0036] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A steam generator for producing dry steam, characterized in that: include: A first-level thick-film heating tube (1) is provided with a water channel therein, and the first-level thick-film heating tube (1) is suitable for heating water flowing into the water channel into wet steam; A secondary thick film heating tube (2) is provided with a steam channel therein, the steam channel being in communication with the water channel, the secondary thick film heating tube (2) being suitable for heating wet steam transported by the water channel into dry steam; the primary thick film heating tube (1) and the secondary thick film heating tube (2) are an integrally connected structure.

2. The steam generator for producing dry steam according to claim 1, characterized in that: Also includes: A first temperature sensor (3) is arranged in contact with the surface of the first-level thick-film heating tube (1), and the first temperature sensor (3) is suitable for obtaining the surface temperature of the first-level thick-film heating tube (1); a second temperature sensor (4), disposed near the outlet of the steam channel, the second temperature sensor (4) being adapted to obtain the temperature at the outlet of the steam channel; The controller (5) is signal-connected to the first temperature sensor (3), the second temperature sensor (4), the first-level thick-film heating tube (1), and the second-level thick-film heating tube (2).

3. The steam generator for producing dry steam according to claim 2, characterized in that: Also includes: The power water supply component is connected to the controller (5) via a signal.

4. The steam generator for producing dry steam according to any one of claims 1 to 3, characterized in that: The water channel is a spiral water channel (6).

5. The steam generator for producing dry steam according to claim 4, characterized in that: The pitch of the spiral waterway (6) gradually decreases along the direction of water flow.

6. The steam generator for producing dry steam according to any one of claims 1 to 3, characterized in that: The steam channel is a straight channel (7).

7. The steam generator for producing dry steam according to claim 3, characterized in that: The power water supply component is a water pump (8).

8. The steam generator for producing dry steam according to claim 2 or 3, characterized in that: The first temperature sensor (3) and the second temperature sensor (4) are both NTC temperature sensors.

9. The steam generator for producing dry steam according to any one of claims 1 to 3, characterized in that: Also includes: A reflux structure (9) is provided in the steam channel, and the reflux structure is suitable for returning condensed water after the dry steam is cooled to the water channel.

10. The steam generator for producing dry steam according to claim 9, characterized in that: The reflux structure (9) is provided with a tapered wall surface.

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