Dead steam recovery device of periodic blowdown flash tank

Abstract

The dead steam recovery device comprises a dead steam treatment mechanism, a condensation cavity and a cavity are formed in the dead steam treatment mechanism, a liquid inlet is formed in one side of the condensation cavity and communicated with an exhaust port, a liquid falling port is formed in the side, away from the liquid inlet, of the condensation cavity, and a condensation mechanism is arranged between the liquid inlet and the liquid falling port. The condensation cavity is communicated with the cavity through the liquid falling opening, the cavity comprises a liquid collecting area and an exhaust area, the liquid collecting area is lower than the liquid falling opening, the exhaust area is connected with the condensation cavity through an air return pipe, the joint of the air return pipe and the condensation cavity is close to the liquid inlet, and a liquid outlet pipe is connected in the liquid collecting area. According to the utility model, the dead steam discharged from the exhaust port of the periodic blowdown flash tank is conveyed into the dead steam treatment mechanism for condensation, and the condensed water formed by condensation of the dead steam can be recycled, so that the dead steam is prevented from being directly discharged into the atmosphere.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of exhaust steam recovery, more particularly to a fixed-discharge expander exhaust steam recovery device. BACKGROUND

[0002] The secondary steam generated in the recovery process of the steam or high-temperature condensed water discharged by the process is called exhaust steam. At present, the exhaust steam discharged by the fixed-discharge expander is directly discharged into the atmosphere from the exhaust port after expansion by the fixed-discharge expander, and cannot be recovered and utilized. A large amount of exhaust steam is discharged into the air, which can easily affect the environmental quality. Therefore, it is urgent to improve it. SUMMARY

[0003] The utility model discloses a fixed-discharge expander exhaust steam recovery device, which overcomes the defects of the prior art. The exhaust steam discharged from the exhaust port of the fixed-discharge expander is conveyed into the exhaust steam treatment mechanism for condensation. The condensed water formed by the exhaust steam condensation can be recovered and utilized, avoiding direct discharge of the exhaust steam into the atmosphere.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a fixed-discharge expander exhaust steam recovery device is used to recover the exhaust steam discharged from the exhaust port of the fixed-discharge expander. The device is characterized by comprising an exhaust steam treatment mechanism, wherein the inside of the exhaust steam treatment mechanism is provided with a condensation cavity and a cavity. One side of the condensation cavity is provided with a liquid inlet, the liquid inlet is communicated with the exhaust port, one side of the condensation cavity away from the liquid inlet is provided with a liquid outlet, a condensation mechanism is arranged between the liquid inlet and the liquid outlet, the condensation cavity and the cavity are communicated through the liquid outlet, the cavity comprises a liquid collecting area and an exhaust area, the liquid collecting area is lower than the liquid outlet, the exhaust area is connected with the condensation cavity through a gas return pipe, the connection part of the gas return pipe and the condensation cavity is close to the liquid inlet, and a liquid outlet pipe is connected in the liquid collecting area.

[0005] Further, the condensation mechanism comprises a plurality of first baffles, a second baffle is arranged between two adjacent first baffles, the upper part of the first baffle is connected with the upper part of the condensation cavity, the lower part of the second baffle is connected with the bottom of the condensation cavity, the lower part of the first baffle is gap-fitted with the bottom of the condensation cavity, the upper part of the second baffle is gap-fitted with the upper part of the condensation cavity, and the first baffles and the second baffles are staggered.

[0006] Further, the second baffle is provided with a liquid passing hole in the area of the bottom of the condensation cavity, and the bottom of the condensation cavity is inclined downward from the liquid inlet to the liquid outlet.

[0007] Further, the liquid outlet pipe comprises a U-shaped section and a liquid outlet section, one end of the U-shaped section is connected with the bottom of the liquid collecting area and the other end is connected with the liquid outlet section, the position of the liquid outlet section is higher than the bottom of the liquid collecting area, and the position of the return bend of the U-shaped section is lower than the bottom of the liquid collecting area.

[0008] Further, the steam exhaust treatment mechanism comprises an exhaust valve located in the exhaust area.

[0009] Further, a heat exchanger and a pump are further included, the liquid collection area is provided with a liquid outlet, the liquid outlet is connected with the inlet end of the heat exchanger through the pump, and the outlet end of the heat exchanger is communicated with the inside of the steam exhaust treatment mechanism.

[0010] Further, a spraying pipe is arranged in the steam exhaust treatment mechanism, the outlet end of the heat exchanger is connected with the spraying pipe, the spraying pipe comprises a plurality of first spraying openings, and the first spraying openings are located at the upper portion of the condensation cavity and communicated with the inside of the condensation cavity.

[0011] Further, an installation cavity is arranged above the condensation cavity, the installation cavity is separated from the condensation cavity through a partition plate, a plurality of avoiding holes communicated with the condensation cavity are arranged in the partition plate, one end of the spraying pipe is inserted into the installation cavity, the first spraying openings are corresponded with the avoiding holes one by one, and the first spraying openings are inserted into the avoiding holes.

[0012] Further, the number of the avoiding holes is consistent with the second baffle and located above the second baffle.

[0013] Further, the gas return pipe is connected with the upper portion of the exhaust area, the side surface of the spraying pipe is provided with a connecting pipe, the connecting pipe is located in the exhaust area and close to the connection between the gas return pipe and the exhaust area, and the lower portion of the connecting pipe is provided with a plurality of second spraying openings.

[0014] In conclusion, the utility model has the following beneficial effects:

[0015] 1、The steam exhausted from the exhaust port of the fixed-displacement expansion vessel enters into the condensation cavity from the liquid inlet, the remaining gas and liquid after the steam is condensed by the condensation mechanism are discharged into the cavity from the liquid outlet, the liquid falls into the liquid collection area for collection, the condensed water can be discharged from the liquid outlet pipe for utilization, the remaining gas enters into the exhaust area from the gas return pipe and then enters into the condensation cavity for condensation again, through the arrangement, the steam can be condensed into water for recycling, the steam is effectively avoided from being directly discharged into the atmosphere, air pollution is prevented, and the utility model is more energy-saving and environment-friendly.

[0016] 2、The condensed water after the steam is condensed by the condensation cavity still has a high temperature, therefore, the high-temperature condensed water in the liquid collection area can be pumped into the heat exchanger for heat exchange, the condensed water after being cooled flows out of the heat exchanger and enters into the spraying pipe, the condensed water in the spraying pipe is sprayed out of the first spraying openings into the condensation cavity, so that the steam in the condensation cavity is sprayed and cooled, the condensation effect of the steam in the condensation cavity is greatly improved, the condensed water can be recycled, the energy loss is reduced, and the utility model is more energy-saving and environment-friendly. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A structural schematic view of the present application;

[0018] Figure 2 A Figure 1 An enlarged view at A;

[0019] Figure 3 A Figure 1 An enlarged view at B.

[0020] Reference signs: 1, steam exhaust treatment mechanism; 11, liquid inlet; 12, liquid outlet; 13, return air pipe; 14, mounting cavity; 15, partition; 16, avoiding hole; 2, condensing cavity; 21, liquid falling port; 22, first baffle; 23, second baffle; 24, liquid passing hole; 3, cavity; 31, liquid collecting area; 32, exhaust area; 4, liquid outlet pipe; 41, U-shaped section; 42, liquid outlet section; 5, spraying pipe; 51, first spraying port; 52, connecting pipe; 53, second spraying port; 6, exhaust valve; 7, heat exchanger; 8, pump; 9, fixed exhaust expander; 91, exhaust port. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0022] Embodiment one:

[0023] As Figures 1 to 3As shown, the embodiment discloses a kind of fixed expansion vessel exhaust steam recovery device, for recovering the exhaust steam from the exhaust port 91 of fixed expansion vessel 9, including exhaust steam processing mechanism 1, the inside of the exhaust steam processing mechanism 1 is equipped with condensing cavity 2 and cavity 3, one side of the condensing cavity 2 is equipped with liquid inlet 11, the liquid inlet 11 is communicated with exhaust port 91, the side of the condensing cavity 2 away from liquid inlet 11 is equipped with liquid outlet 21, liquid inlet 11 and liquid outlet 21 are equipped with condensing mechanism, the condensing cavity 2 is communicated with cavity 3 by liquid outlet 21, the cavity 3 includes liquid collection area 31 and exhaust area 32, the liquid collection area 31 position is lower than liquid outlet 21, the exhaust area 32 is connected with condensing cavity 2 by return air pipe 13, the connecting place of return air pipe 13 and condensing cavity 2 is close to liquid inlet 11, the return air pipe 13 is connected with the upper portion of exhaust area 32, the liquid collection area 31 is connected with liquid outlet pipe 4, the exhaust steam processing mechanism 1 includes exhaust valve 6, the exhaust valve 6 is located in exhaust area 32, exhaust valve 6 is safety valve, when the pressure in exhaust steam processing mechanism 1 is higher than the set value of exhaust valve 6, exhaust valve 6 opens and exhausts, exhaust valve 6 is prior art, and its specific structure is not described in detail in the specification.

[0024] The exhaust steam from the exhaust port 91 of fixed expansion vessel 9 enters into condensing cavity 2 from liquid inlet 11, the remaining gas and liquid after the exhaust steam is condensed by condensing mechanism are discharged into cavity 3 from liquid outlet 21, wherein the liquid falls into liquid collection area 31 and is collected, and the condensed water can be discharged from liquid outlet pipe 4 for use, and the remaining gas enters into exhaust area 32 and is condensed again in condensing cavity 2 from return air pipe 13, by the above arrangement, the exhaust steam can be condensed into water, the exhaust steam can be recycled, the exhaust steam can be effectively avoided from being directly discharged into atmosphere, air pollution can be prevented, and energy saving and environmental protection are achieved.

[0025] The condensing mechanism includes a plurality of first baffles 22, a second baffle 23 is arranged between adjacent two first baffles 22, the upper portion of the first baffle 22 is connected with the upper portion of the condensing cavity 2, the lower portion of the second baffle 23 is connected with the bottom of the condensing cavity 2, the lower portion of the first baffle 22 is gap-fitted with the bottom of the condensing cavity 2, the upper portion of the second baffle 23 is gap-fitted with the upper portion of the condensing cavity 2, the first baffle 22 and the second baffle 23 are staggered, the second baffle 23 is provided with liquid passing hole 24 in the area of the bottom of the condensing cavity 2, the bottom of the condensing cavity 2 is arranged to be inclined downward from liquid inlet 11 to liquid outlet 21, the first baffle 22 and the second baffle 23 are both metal heat dissipation fins, by staggering the first baffle 22 and the second baffle 23, not only the exhaust steam can be fully contacted with the first baffle 22 and the second baffle 23, but also the passing distance of the exhaust steam can be increased, the condensing effect of the exhaust steam can be improved, by arranging the liquid passing hole 24 and the inclined bottom of the condensing cavity 2, the flow of the condensed water can be facilitated, so that the condensed water can be easily discharged from liquid outlet 21.

[0026] As Figure 2 shown, the liquid outlet pipe 4 includes a U-shaped section 41 and a liquid outlet section 42, one end of the U-shaped section 41 is connected with the bottom of the liquid collecting area 31 and the other end is connected with the liquid outlet section 42, the position of the liquid outlet section 42 is higher than the bottom of the liquid collecting area 31, the position of the return bend of the U-shaped section 41 is lower than the bottom of the liquid collecting area 31, through the above design, it can effectively ensure that the return bend of the U-shaped section 41 can quickly supplement liquid after the start of the steam treatment mechanism 1, avoid the steam from the liquid outlet pipe 4, and set the liquid outlet section 42 to be higher than the bottom of the liquid collecting area 31, which can not only ensure that the liquid in the liquid collecting area 31 will not be emptied, but also can control the liquid level in the liquid collecting area 31 to prevent the liquid level from being too high.

[0027] Example two:

[0028] Based on example one, it further includes a heat exchanger 7 and a pump 8, the heat exchanger 7 and the pump 8 are both prior art, and the specific structure is not described in this specification, the liquid collecting area 31 is provided with a liquid outlet 12, the liquid outlet 12 is connected with the inlet end of the heat exchanger 7 through the pump 8, the outlet end of the heat exchanger 7 is communicated with the inside of the steam treatment mechanism 1, the inside of the steam treatment mechanism 1 is provided with a spray pipe 5, the outlet end of the heat exchanger 7 is connected with the spray pipe 5, the spray pipe 5 includes a plurality of first spray openings 51, the first spray openings 51 are located at the upper part of the condensing cavity 2 and communicated with the inside of the condensing cavity 2.

[0029] After the steam is condensed by the condensing cavity 2, the condensed condensate water also has a relatively high temperature, therefore, through the pump 8, the high-temperature condensate water in the liquid collecting area 31 can be pumped into the heat exchanger 7 for heat exchange, the cooled condensate water flows out of the heat exchanger 7 into the spray pipe 5, the condensate water in the spray pipe 5 is sprayed out of the first spray openings 51 into the condensing cavity 2, thereby spraying and cooling the steam in the condensing cavity 2, which not only can greatly improve the condensing effect of the steam in the condensing cavity 2, but also can reuse the condensate water, reduce energy loss, and be more energy-saving and environment-friendly.

[0030] As Figure 1 and Figure 3 shown, the condensing cavity 2 is provided with a mounting cavity 14 above, the mounting cavity 14 is separated from the condensing cavity 2 by a partition plate 15, a plurality of avoiding holes 16 communicated with the condensing cavity 2 are arranged in the partition plate 15, one end of the spray pipe 5 is inserted into the mounting cavity 14, the first spray openings 51 correspond to the avoiding holes 16 one by one, the first spray openings 51 are inserted into the avoiding holes 16, the number of the avoiding holes 16 is consistent with the second baffle 23 and located directly above the second baffle 23, through the above design, it can effectively improve the spraying effect of the first spray openings 51 in the condensing cavity 2.

[0031] The spraying pipe 5 is provided with a connecting pipe 52 located in the exhaust area 32 and close to the connecting position of the air return pipe 13 and the exhaust area 32, and the lower part of the connecting pipe 52 is provided with a plurality of second spraying openings 53, so that the steam in the exhaust area 32 can be sprayed and condensed again through the second spraying openings 53 when the remaining steam is discharged into the exhaust area 32, thereby effectively improving the condensation effect of the steam.

[0032] The preferred embodiments of the present application are described above, the protection scope of the present application is not limited to the above-mentioned embodiments, any technical solutions falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled in the art, some improvements and decorations without departing from the principles of the present application shall be considered as falling within the protection scope of the present application.

Claims

1. A device for recovering exhaust steam from a fixed displacement expander (9), which is characterized by comprising: The exhaust steam treatment mechanism (1) is internally provided with a condensation cavity (2) and a cavity (3), one side of the condensation cavity (2) is provided with a liquid inlet (11), the liquid inlet (11) is communicated with an exhaust port (91), the side of the condensation cavity (2) away from the liquid inlet (11) is provided with a liquid falling port (21), the condensation cavity (2) and the cavity (3) are communicated through the liquid falling port (21), the cavity (3) comprises a liquid collecting area (31) and an exhaust area (32), the liquid collecting area (31) is lower than the liquid falling port (21), the exhaust area (32) is connected with the condensation cavity (2) through a back gas pipe (13), the connection part of the back gas pipe (13) and the condensation cavity (2) is close to the liquid inlet (11), and the liquid collecting area (31) is connected with a liquid outlet pipe (4).

2. The device according to claim 1, wherein The condensation mechanism comprises a plurality of first baffles (22), and a second baffle (23) is arranged between adjacent two first baffles (22), the upper part of the first baffle (22) is connected with the upper part of the condensation cavity (2), the lower part of the second baffle (23) is connected with the bottom of the condensation cavity (2), the lower part of the first baffle (22) is gap-fitted with the bottom of the condensation cavity (2), the upper part of the second baffle (23) is gap-fitted with the upper part of the condensation cavity (2), and the first baffle (22) and the second baffle (23) are staggered.

3. The exhaust heat recovery device for a fixed displacement expander according to claim 2, characterized by The second baffle (23) is arranged at the area of the bottom of the condensation cavity (2) and is provided with a liquid passing hole (24), and the bottom of the condensation cavity (2) is arranged to be inclined downward from the liquid inlet (11) to the liquid falling port (21).

4. The device according to claim 1, wherein The liquid outlet pipe (4) comprises a U-shaped section (41) and a liquid outlet section (42), one end of the U-shaped section (41) is connected with the bottom of the liquid collecting area (31), the other end is connected with the liquid outlet section (42), the position of the liquid outlet section (42) is higher than the bottom of the liquid collecting area (31), and the position of the back bending part of the U-shaped section (41) is lower than the bottom of the liquid collecting area (31).

5. The exhaust heat recovery device for a fixed displacement expander according to claim 1, characterized by The exhaust steam treatment mechanism (1) comprises an exhaust valve (6), and the exhaust valve (6) is arranged in the exhaust area (32).

6. The exhaust heat recovery device for a fixed displacement expander according to claim 1, characterized by Further comprising a heat exchanger (7) and a pump (8), the side of the liquid collecting area (31) is provided with a liquid outlet (12), the liquid outlet (12) is connected with the inlet end of the heat exchanger (7) through the pump (8), and the outlet end of the heat exchanger (7) is communicated with the inside of the exhaust steam treatment mechanism (1).

7. A device for recovering exhaust steam from a constant-velocity expansion vessel according to claim 6, characterized in that The inside of the exhaust steam treatment mechanism (1) is provided with a spray pipe (5), the outlet end of the heat exchanger (7) is connected with the spray pipe (5), the spray pipe (5) comprises a plurality of first spray openings (51), and the first spray openings (51) are arranged at the upper part of the condensation cavity (2) and are communicated with the inside of the condensation cavity (2).

8. The exhaust heat recovery device for a fixed displacement expander according to claim 7, characterized by The condensing cavity (2) is provided with a mounting cavity (14) above it, the mounting cavity (14) is separated from the condensing cavity (2) by a partition (15), the partition (15) is provided with a plurality of escape holes (16) communicating with the condensing cavity (2), one end of the spray pipe (5) is inserted into the mounting cavity (14), the first spray opening (51) corresponds to the escape hole (16) one by one, and the first spray opening (51) is inserted into the escape hole (16).

9. The device according to claim 8, characterized in that, The number of the escape holes (16) is consistent with the second baffle (23) and located directly above the second baffle (23).

10. The device according to claim 7, wherein The return air pipe (13) is connected with the upper part of the exhaust area (32), the side surface of the spray pipe (5) is provided with a connecting pipe (52), the connecting pipe (52) is located in the exhaust area (32) and close to the connection between the return air pipe (13) and the exhaust area (32), and the lower part of the connecting pipe (52) is provided with a plurality of second spray openings (53).

Images