CN212440079U

CN212440079U - Pure steam production system

Info

Publication number: CN212440079U
Application number: CN202021056333.3U
Authority: CN
Inventors: 张健; 石建华
Original assignee: Truking Watertown Pharmaceutical Equipment Co Ltd
Current assignee: Truking Watertown Pharmaceutical Equipment Co Ltd
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2021-02-02
Anticipated expiration: 2030-06-10

Abstract

The utility model relates to a pure steam production system, pure steam production system include raw materials water input pipeline, first transportation pipeline, intermittent type discharge pipeline, pre-heater and falling film evaporation ware. The raw material water input pipeline is used for inputting raw material water. The preheater comprises a first tube side inlet and a first tube side outlet which are communicated with each other. The first tube pass inlet is communicated with the raw material water input pipeline, and the first tube pass outlet is communicated with the first conveying pipeline. One end of the first conveying pipeline, which is far away from the preheater, is communicated with the top of the falling film evaporator. The falling film evaporator is communicated with the pure steam output pipeline and is used for discharging pure steam. The bottom of the falling film evaporator is communicated with the initial end of the first conveying pipeline. The preheater also includes a shell-side first inlet. The pure steam production system is favorable for improving the utilization rate of raw material water and the energy utilization rate, and is also favorable for reducing the content of impurities in the raw material water so as to ensure that the requirement of producing high-quality pure steam on the raw material water is met.

Description

Pure steam production system

Technical Field

The utility model relates to a pure steam production technical field especially relates to a pure steam production system.

Background

In the field of pharmaceutical industry, pure steam can be used for links such as moist heat sterilization, for example, for disinfection of equipment and pipelines. Pure steam production systems are used to produce pure steam. Pure steam evaporators are one of the important component devices of pure steam production systems. The raw water is heated in a pure steam evaporator to produce pure steam, and the pure steam is transported out through a pipeline. However, the pure steam production system in the industry at present generally has the problems of low pure steam quality, low raw material water utilization rate, high energy consumption and the like.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a pure steam production system to improve the quality of pure steam and to improve the utilization rate of raw water and energy.

A pure steam production system comprising:

the system comprises a raw material water input pipeline, a first conveying pipeline and an intermittent discharge pipeline, wherein the raw material water input pipeline is used for inputting raw material water;

the preheater comprises a first tube pass inlet and a first tube pass outlet which are communicated, the first tube pass inlet is communicated with the raw material water input pipeline, the first tube pass outlet is communicated with the initial end of the first conveying pipeline, and the tail end of the first conveying pipeline, which is far away from the preheater, is communicated with the top of the falling-film evaporator; the falling-film evaporator is communicated with a pure steam output pipeline and used for discharging pure steam, and the bottom of the falling-film evaporator is communicated with the initial end of the first conveying pipeline; the preheater also comprises a shell side first inlet, the initial end of the intermittent discharge pipeline is communicated with the first conveying pipeline, and the tail end of the intermittent discharge pipeline is communicated with the shell side first inlet.

The technical solution is further explained below:

in one embodiment, the intermittent discharge pipeline is provided with a pneumatic angle seat valve and a check valve, and the first conveying pipeline is provided with a centrifugal pump.

In one embodiment, the pure steam production system further comprises a second transportation pipeline and a material water buffer tank, and the first tube side outlet is communicated with the first transportation pipeline through the second transportation pipeline and the material water buffer tank in sequence; the starting end of the second conveying pipeline is communicated with the first tube pass outlet, the tail end of the second conveying pipeline is communicated with the inlet end of the material water buffer tank, and the starting end of the first conveying pipeline is communicated with the material water buffer tank.

In one embodiment, the pure steam production system further comprises an industrial steam pipeline, the industrial steam pipeline is communicated with the falling film evaporator, and a pneumatic proportional control valve is arranged on the industrial steam pipeline; and the pure steam output pipeline is provided with a pressure transmitter, and the pressure transmitter is electrically connected with the pneumatic proportion regulating valve.

In one embodiment, the pure steam production system further comprises a third transportation pipeline, the initial end of the third transportation pipeline is communicated with the falling film evaporator, and the tail end of the third transportation pipeline is communicated with the shell side second inlet of the preheater for transporting the condensed water formed by the industrial steam into the shell side of the preheater; and a drain valve is arranged on the third conveying pipeline.

In one embodiment, the pure steam production system further comprises a fourth transportation pipeline, the starting end of the fourth transportation pipeline is communicated with the bottom of the falling film evaporator, and the tail end of the fourth transportation pipeline is communicated with the feed water buffer tank, so that the feed water heated in the falling film evaporator is input into the feed water buffer tank.

In one embodiment, the pure steam production system further comprises a sampling condenser, a cooling water input pipeline and a cooling water output pipeline, wherein the tube side of the sampling condenser is communicated with the pure steam output pipeline; the initial end of the cooling water input pipeline is communicated with the raw material water input pipeline, and the tail end of the cooling water input pipeline is communicated with the shell pass of the sampling condenser; the initial end of the cooling water output pipeline is communicated with the shell pass of the sampling condenser, and the tail end of the cooling water output pipeline is communicated with the feed water buffer tank.

In one embodiment, the pure steam production system further comprises a waste discharge pipeline which is communicated with the top of the falling film evaporator and is used for discharging the non-condensable gas in the raw water.

In one embodiment, the pure steam production system further comprises a fifth transportation pipeline, wherein the beginning end of the fifth transportation pipeline is communicated with the tube side of the sampling condenser, and the tail end of the fifth transportation pipeline is communicated with the waste discharge pipeline.

In one embodiment, the preheater further comprises a shell-side outlet for discharging condensed water formed by the process steam and the discharge water of the intermittent discharge conduit.

The pure steam production system at least has the following beneficial effects:

in the pure steam production system provided by this embodiment, the raw water passes through the preheater and then enters the falling film evaporator to be evaporated, the raw water is gradually concentrated during the evaporation process, and the raw water that is not evaporated flows into the first transportation pipeline again from the bottom of the falling film evaporator. The temperature of the raw material water flowing out of the bottom of the falling film evaporator is always in a state close to the evaporation boiling point, most of the raw material water can flow back into the falling film evaporator for reuse through the first conveying pipeline, the demand of quick response when a user uses pure steam at full load can be met, and the consumption of industrial steam and the raw material water is almost avoided in a standby state. And part of the raw material water flowing out of the bottom of the falling film evaporator can be discharged through an intermittent discharge pipeline and a preheater, so that the impurity content of the raw material water in the falling film evaporator is favorably reduced, and the requirement of producing high-quality pure steam on the raw material water is met. In addition, a part of the raw material water flowing out of the bottom of the falling film evaporator flows into the shell side of the preheater through the intermittent discharge pipeline, so that the raw material water in the tube side of the preheater can be heated, the energy utilization rate is favorably improved, and the production benefit is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a pure steam production system according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the falling film evaporator shown in FIG. 1;

fig. 3 is a schematic view of the structure of the preheater shown in fig. 1.

Description of reference numerals: 110. a raw material water input pipeline; 120. a first transport pipe; 121. a centrifugal pump; 130. an intermittent discharge conduit; 131. a pneumatic angle seat valve; 132. a check valve; 140. a pure steam output pipeline; 141. a pressure transmitter; 150. a second transport pipeline; 160. an industrial steam pipeline; 161. a pneumatic proportional regulating valve; 162. a third transport pipeline; 163. a drain valve; 170. a fourth transport pipeline; 181. a cooling water input pipe; 1811. a pneumatic diaphragm valve; 182. a cooling water output pipe; 1821. a needle valve; 183. a fifth transport pipeline; 190. a waste pipe; 191. a first branch pipe; 192. a second branch pipe; 210. a preheater; 211. a first tube side inlet; 212. a first tube side outlet; 213. a shell-side first inlet; 214. a shell-side second inlet; 215. a shell-side outlet; 220. a falling film evaporator; 221. a nozzle; 222. a water distribution component; 223. a heat exchange pipe; 224. a spiral separator; 230. a material water buffer tank; 231. a mechanical float valve; 232. an inlet end; 240. the condenser was sampled.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

The embodiment provides a pure steam production system, which has the advantages of improving the high quality of pure steam, improving the utilization rate of raw water and the energy utilization rate, and will be described in detail with reference to the attached drawings.

In one embodiment, referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a pure steam production system according to an embodiment of the present invention; figure 2 shows a schematic diagram of the falling film evaporator of figure 1; fig. 3 is a schematic view showing the construction of the preheater shown in fig. 1. A pure steam production system comprises a raw water input conduit 110, a first transport conduit 120, an intermittent discharge conduit 130, a preheater 210 and a falling film evaporator 220. The raw water input pipe 110 is used to input raw water. The preheater 210 includes a first tube-side inlet 211 and a first tube-side outlet 212 in communication. The first tube side inlet 211 is connected to the raw water input pipe 110, and the first tube side outlet 212 is connected to the first transport pipe 120. The end of the first transport pipe 120 remote from the preheater 210 communicates with the top of the falling film evaporator 220. The falling film evaporator 220 is connected to the pure steam outlet line 140 for discharging pure steam. The bottom of the falling film evaporator 220 is communicated with the beginning of the first transport pipe 120. The preheater 210 also includes a shell-side first inlet 213. The initial end of the intermittent discharge conduit 130 is connected to the first transport conduit 120, and the final end of the intermittent discharge conduit 130 is connected to the shell-side first inlet 213.

In the pure steam production system provided in this embodiment, the raw water passes through the preheater 210 and then enters the falling film evaporator 220 to be evaporated, the raw water is gradually concentrated during the evaporation process, and the raw water that is not evaporated flows into the first transport pipe 120 again from the bottom of the falling film evaporator 220. The temperature of the raw material water flowing out of the bottom of the falling-film evaporator 220 is always in a state close to the evaporation boiling point, most of the raw material water can flow back into the falling-film evaporator 220 for reuse through the first conveying pipeline 120, the demand of quick response when the pure steam is used in full load can be met, and the consumption of industrial steam and raw material water is almost avoided in a standby state. A part of the raw water flowing out of the bottom of the falling-film evaporator 220 can also be discharged through the intermittent discharge pipeline 130 and the preheater 210, so that the impurity content of the raw water in the falling-film evaporator 220 can be reduced, and the requirement of the raw water for producing high-quality pure steam can be met. In addition, a part of the raw water flowing out of the bottom of the falling film evaporator 220 flows into the shell side of the preheater 210 through the intermittent discharge pipeline 130, and the raw water in the tube side of the preheater 210 can be heated, so that the energy utilization rate is improved, and the production benefit is improved.

In one embodiment, referring to fig. 1 to 3, the intermittent discharge pipe 130 is provided with a pneumatic angle seat valve 131 and a check valve 132, and the first transport pipe 120 is provided with a centrifugal pump 121. The pneumatic angle seat valve 131 is applied to the working condition of short-time frequent starting, has the characteristics of sensitive response and accurate action, and is used for accurately controlling the flow of fluid. The raw water supplied from the raw water supply line 110 is introduced into the first transport line 120, and the centrifugal pump 121 pressurizes and supplies the raw water in the first transport line 120 to the falling film evaporator 220 for evaporation.

In one embodiment, referring to fig. 1-3, the pure steam production system further includes a second transport pipe 150 and a feed water buffer tank 230. The first tube side outlet 212 is connected to the first transport pipe 120 through the second transport pipe 150 and the feed water buffer tank 230 in sequence. The beginning end of the second transport pipe 150 is connected to the first pipe outlet 212, the end of the second transport pipe 150 is connected to the inlet end 232 of the material water buffer tank 230, and the beginning end of the first transport pipe 120 is connected to the material water buffer tank 230. Specifically, the raw water input from the raw water input pipe 110 flows into the preheater 210 to be heated, and then flows into the raw water buffer tank 230 through the second transport pipe 150. The high-temperature raw material water that enters the falling-film evaporator 220 and is not evaporated also flows into the raw material water buffer tank 230 from the bottom of the falling-film evaporator 220. The raw water introduced into the feed water buffer tank 230 from the second transport pipe 150 is mixed with the high-temperature raw water flowing into the feed water buffer tank 230 from the bottom of the falling film evaporator 220, and then the mixed raw water flows into the falling film evaporator 220 through the first transport pipe 120 to be continuously evaporated. Wherein the amount of the raw material water fed into the material water buffer tank 230 from the second transport pipe 150 is small and much smaller than the high temperature raw material water flowing into the material water buffer tank 230 from the bottom of the falling film evaporator 220. Therefore, the temperature of the raw material water mixed by the material water buffer tank 230 can be ensured to be still close to the evaporation boiling point, the raw material water is convenient to evaporate into pure steam in the falling-film evaporator 220, and the requirement of quick response when the pure steam is used in full load can be met. Further, the inlet end 232 of the feed water buffer tank 230 is provided with a mechanical ball float valve 231 for controlling the liquid level of the feed water buffer tank 230, so that the raw material water entering the falling film evaporator 220 is proper, the situation that the raw material water is too much to cause high water content of the produced pure steam is avoided, and the dryness and stability of the produced pure steam are ensured.

In one embodiment, referring to fig. 1-3, the pure steam production system further includes an industrial steam pipeline 160. The industrial steam line 160 is in communication with a falling film evaporator 220. The industrial steam pipeline 160 is provided with a pneumatic proportional control valve 161. The pure steam output pipeline 140 is provided with a pressure transmitter 141, and the pressure transmitter 141 is electrically connected to the pneumatic proportional control valve 161. The pressure transmitter 141 is a device that converts pressure into a pneumatic signal or an electric signal for control and remote transmission. The pressure sensor can convert physical pressure parameters of gas, liquid and the like sensed by the pressure element sensor into standard electric signals (such as 4-20 mADC and the like) so as to supply to instruments such as an indication alarm instrument, a recorder, a regulator, a pneumatic proportional control valve 161 and the like for measurement, indication and process regulation. In this embodiment, industrial steam is fed to falling film evaporator 220 via industrial steam line 160 for heating the feed water. The pneumatic proportional control valve 161 of the industrial steam pipeline 160 and the pressure transmitter 141 of the pure steam output pipeline 140 are cooperatively controlled, and the deviation or fluctuation between the actual output pressure of the pure steam output by the pure steam output pipeline 140 and a set value is not more than +/-5% by controlling the input amount of the industrial steam, so that the pure steam consumption under different sterilization working conditions is met.

In one embodiment, referring to fig. 1-3, the pure steam production system further includes a third transport pipe 162. The beginning end of the third transportation pipeline 162 is communicated with the falling film evaporator 220, and the tail end of the third transportation pipeline 162 is communicated with the shell-side second inlet 214 of the preheater 210, so that condensed water formed by industrial steam is transported into the shell side of the preheater 210. A drain valve 163 is arranged on the third transport pipe 162. Specifically, trap 163 is also known as an automatic drain or condensate drain, which is divided into steam system use and gas system use. Industrial steam is input into the falling film evaporator 220 from the industrial steam pipeline 160 to heat the raw material water, and then condensed water formed by the industrial steam flows to the shell side of the preheater 210 from the third conveying pipeline 162 to heat the raw material water, so that sensible heat of the industrial steam can be recovered, and the energy utilization rate is improved.

Specifically, the preheater 210 also includes a shell-side outlet 215, the shell-side outlet 215 for discharging condensed water formed from the process steam and the discharge water of the intermittent discharge conduit 130. The condensate formed from the process steam flowing into the shell side of the preheater 210 from the third transport conduit 162 is used to heat the feed water in the tube side of the preheater 210, and the process steam condensate is then discharged from the shell side outlet 215. The feed water entering the shell-side first inlet 213 from the intermittent discharge line 130 is the discharge water, which is also discharged from the shell-side outlet 215.

In one embodiment, referring to fig. 1-3, the pure steam production system further includes a fourth transport pipe 170. The beginning end of the fourth transportation pipeline 170 is communicated with the bottom of the falling film evaporator 220, and the tail end of the fourth transportation pipeline 170 is communicated with the feed water buffer tank 230, and is used for inputting the feed water heated in the falling film evaporator 220 into the feed water buffer tank 230. Specifically, the raw material water is heated by the industrial steam in the falling film evaporator 220, a part of the raw material water is evaporated to form pure steam, and a part of the raw material water flows into the raw material water buffer tank 230 from the bottom of the falling film evaporator 220 through the fourth transport pipe 170. The raw water flowing into the feed water buffer tank 230 enters the falling film evaporator 220 through the first transport pipe 120 for recycling, and also enters the shell side of the preheater 210 through the intermittent discharge pipe 130 to heat the raw water in the tube side of the preheater 210. Therefore, the utilization rate of raw material water and the energy utilization rate can be improved, and energy conservation and emission reduction are facilitated.

In one embodiment, referring to fig. 1 to 3, the pure steam production system further includes a sampling condenser 240, a cooling water input pipe 181, and a cooling water output pipe 182. The tube side of the sampling condenser 240 is communicated with the pure steam output pipeline 140. The initial end of the cooling water input pipe 181 is connected to the raw material water input pipe 110, and the tail end of the cooling water input pipe 181 is connected to the shell side of the sampling condenser 240. The beginning end of the cooling water output pipeline 182 is communicated with the shell side of the sampling condenser 240, and the tail end of the cooling water output pipeline 182 is communicated with the feed water buffer tank 230. Some pure steam is shunted out from the pure steam output pipeline 140 and enters the tube pass of the sampling condenser 240, some raw water is shunted out from the raw water input pipeline 110 and enters the shell pass of the sampling condenser 240 through the cooling water input pipeline 181, the raw water is used for cooling the pure steam in the tube pass, and the cooled pure steam can be used for testing parameters such as conductivity and the like. The temperature of the raw material water rises after absorbing the heat of the pure steam, and the raw material water flows into the raw material water buffer tank 230 from the cooling water output pipeline 182 and enters the falling film evaporator 220 for reuse, so that the utilization rate of the raw material water is improved. And the pure steam production system can cool the pure steam in the sampling condenser 240 without additionally arranging a cold public project, so that the manufacturing cost of the system is reduced. Wherein, a pneumatic diaphragm valve 1811 is arranged on the cooling water input pipeline 181 to control the on-off of the cooling water input pipeline 181. A needle valve 1821 is provided in the cooling water outlet pipe 182 to adjust the on/off and flow rate of the cooling water outlet pipe 182.

As another alternative, the cooling water output pipe 182 is connected to the sampling condenser 240 at its initial end and to the waste water pipe 190 at its final end, and the raw water, which has been heated after absorbing the heat of the pure steam in the sampling condenser 240, may flow directly from the cooling water output pipe 182 into the waste water pipe 190 without flowing back into the raw water buffer tank 230.

In one embodiment, referring to fig. 1-3, the pure steam production system further includes a waste line 190. The waste discharge pipe 190 is connected to the top of the falling film evaporator 220 for discharging the non-condensable gas in the raw water. Specifically, the interior of the falling film evaporator 220 is provided with a nozzle 221, a water distribution assembly 222, a heat exchange pipe 223, and a spiral separator 224 in this order from the top to the bottom thereof. The tail end of the first transport pipe 120 is communicated with the nozzle 221, the raw material water is sprayed from the nozzle 221, enters the heat exchange pipe 223 after being dispersed by the water distribution assembly 222, and slides downwards along the inner wall of the heat exchange pipe 223 in the form of a liquid film. The heat exchange tube 223 is filled with industrial steam, and the industrial steam has a high temperature and is used for heating the raw material water in the heat exchange tube 223, so that the raw material water is evaporated to form a gas-liquid mixture. The gas-liquid mixture of the raw water flows into the spiral separator 224 from the heat exchange pipe 223, pure steam in the raw water is separated and output from the pure steam output pipe 140, and the raw water without pure steam is introduced into the raw water buffer tank 230 from the bottom of the falling film evaporator 220 through the fourth transport pipe 170. Further, a part of the raw material water supplied from the first transport pipe 120 to the nozzle 221 is supplied from the preheater 210 or the raw material water supplied from the raw material water buffer tank 230, and the raw material water supplied from the first transport pipe 120 to the nozzle 221 is supplied in a gas-liquid mixed state at a high temperature. After the raw material water is dispersed by the nozzle 221, the non-condensable gas in the raw material water is discharged from the waste pipe 190. Wherein the exhaust duct 190 includes a first branch pipe 191 and a second branch pipe 192, the first branch pipe 191 is used for discharging gas in the non-condensable gas, and the second branch pipe 192 is used for discharging condensed water of a small amount of steam accompanying the outflow of the non-condensable gas.

Further, the utility model discloses a pure steam production system is when being in standby state, and the interior unevaporated raw materials water of falling film evaporator 220 flows into material water buffer tank 230, and rethread first transportation pipeline 120 gets into falling film evaporator 220 top after stepping up by centrifugal pump 121. This raw materials temperature is in the state of being close to the evaporation boiling point always, and evaporation efficiency is high in heat transfer in-process, can the rapid evaporation be pure steam, can satisfy user's demand quick response when to pure steam full load quantity, and nearly no industry steam and raw materials water consumption under the standby state.

In one embodiment, referring to fig. 1 to 3, the pure steam production system further includes a fifth transportation pipe 183, wherein a beginning end of the fifth transportation pipe 183 is connected to a tube side of the sampling condenser 240, and a tail end of the fifth transportation pipe 183 is connected to the waste pipe 190. Specifically, the rear end of the fifth transport pipe 183 communicates with the second branch pipe 192 of the waste pipe 190. The pure steam in the tube side of the sampling condenser 240 is cooled by the cooling water in the shell side of the sampling condenser 240 to form condensed water, and the condensed water is discharged from the fifth transport pipeline 183 and the second branch pipe 192 of the waste discharge pipeline 190 in sequence.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims

1. A pure steam production system, comprising:

2. The pure steam production system of claim 1 wherein the intermittent discharge piping is provided with a pneumatic angle seat valve and a check valve, and the first transport piping is provided with a centrifugal pump.

3. The pure steam production system according to claim 1, further comprising a second transport pipeline and a feed water buffer tank, wherein the first tube side outlet is communicated with the first transport pipeline sequentially through the second transport pipeline and the feed water buffer tank; the starting end of the second conveying pipeline is communicated with the first tube pass outlet, the tail end of the second conveying pipeline is communicated with the inlet end of the material water buffer tank, and the starting end of the first conveying pipeline is communicated with the material water buffer tank.

4. The pure steam production system according to claim 1, further comprising an industrial steam pipeline, wherein the industrial steam pipeline is communicated with the falling film evaporator, and a pneumatic proportional control valve is arranged on the industrial steam pipeline; and the pure steam output pipeline is provided with a pressure transmitter, and the pressure transmitter is electrically connected with the pneumatic proportion regulating valve.

5. The pure steam production system according to claim 4, further comprising a third transportation pipeline, wherein the beginning end of the third transportation pipeline is communicated with the falling film evaporator, and the tail end of the third transportation pipeline is communicated with the shell side second inlet of the preheater for transporting condensed water formed by industrial steam into the shell side of the preheater; and a drain valve is arranged on the third conveying pipeline.

6. The pure steam production system according to claim 3, further comprising a fourth transportation pipeline, wherein a start end of the fourth transportation pipeline is communicated with the bottom of the falling film evaporator, and a tail end of the fourth transportation pipeline is communicated with the feed water buffer tank, so as to input the feed water heated in the falling film evaporator into the feed water buffer tank.

7. The pure steam production system according to claim 3, further comprising a sampling condenser, a cooling water input pipeline and a cooling water output pipeline, wherein the tube side of the sampling condenser is communicated with the pure steam output pipeline; the initial end of the cooling water input pipeline is communicated with the raw material water input pipeline, and the tail end of the cooling water input pipeline is communicated with the shell pass of the sampling condenser; the initial end of the cooling water output pipeline is communicated with the shell pass of the sampling condenser, and the tail end of the cooling water output pipeline is communicated with the feed water buffer tank.

8. The pure steam production system according to claim 7, further comprising a waste discharge pipe communicated with the top of the falling film evaporator for discharging the non-condensable gas in the raw water.

9. The pure steam production system according to claim 8, further comprising a fifth transport pipeline, wherein the beginning end of the fifth transport pipeline is communicated with the tube side of the sampling condenser, and the end of the fifth transport pipeline is communicated with the waste discharge pipeline.

10. The pure steam production system of claim 1 wherein the preheater further comprises a shell-side outlet for discharging condensed water formed from the process steam and the discharge water of the intermittent discharge conduit.