CN112274961A - Automatic recovery unit of steam condensate - Google Patents
Automatic recovery unit of steam condensate Download PDFInfo
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- CN112274961A CN112274961A CN202011198000.9A CN202011198000A CN112274961A CN 112274961 A CN112274961 A CN 112274961A CN 202011198000 A CN202011198000 A CN 202011198000A CN 112274961 A CN112274961 A CN 112274961A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
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Abstract
The invention relates to an automatic recovery device for steam condensate, which mainly comprises a non-condensable gas cooler, a condensate collecting tank, a liquid guide pipe, a check valve, a condensate conveying tank, a low liquid level switch, a high liquid level switch, an air inlet pipe, an exhaust pipe, a control valve, a control box and the like. The invention has simple configuration, convenient operation and stable operation, the control signals of the low liquid level switch, the high liquid level switch and the control valve are respectively connected with the control box, and the compressed gas is adopted to replace the conventional power equipment as a power source to convey the condensate, thereby solving the problems of cavitation of the power equipment and pipeline corrosion. The invention has small floor area, low energy consumption and high condensate recovery rate, not only reduces the labor intensity, but also reduces the production cost, and can be widely applied to the process for recovering the steam condensate.
Description
Technical Field
The invention belongs to the technical field of chemical industry, and particularly relates to an automatic recovery device for steam condensate.
Background
In the chemical production process, two types of steam condensate recovery devices, namely an open type condensate recovery device and a closed type condensate recovery device, are generally adopted. The open condensate recovery device is characterized in that steam condensate is intensively recovered to a flash evaporation tank or an open underground tank through a pipeline, steam and condensate carried by the condensate are exhausted due to secondary steam of flash evaporation after the pressure of the condensate is reduced to normal pressure or are cooled by a condenser for utilization, and the remaining condensate with the temperature of nearly 100 ℃ is cooled and then is conveyed into a soft water tank by a pump to be used as pure water or boiler make-up water. The system has the advantages of simple equipment, convenient operation and small initial investment; but the system occupies a large area, the obtained economic benefit is poor, the environmental pollution is large, and because the condensate is directly contacted with the atmosphere, the concentration of dissolved oxygen in the condensate is increased, and the corrosion of equipment is easy to generate. The closed condensate recovery device is characterized in that discharged condensate is concentrated and returned to a closed concentrated water tank through a pipeline, softened water with the temperature of more than 100 ℃ is directly input into a boiler by utilizing a high-temperature condensate comprehensive recovery device to form a closed circulation system from steam supply to recovery, but the device has high energy consumption and high initial investment.
Chinese patent CN210384893U proposes a vapor condensate recovery device, which comprises a working tower, a reboiler, a vapor condensate tank, a vapor header, a first vapor condensate tank, a first regulating valve, a second regulating valve, a first stop valve and a second stop valve, the working tower is connected with one end of a reboiler, one end of the reboiler is connected with one end of a first stop valve, the other end of the first stop valve is connected with a steam condensate tank, the working tower is connected with the other end of the reboiler, the other end of the reboiler is connected with one end of a first regulating valve, the other end of the first regulating valve is connected with a steam main pipe, the one end of reboiler is connected with the one end of second governing valve, the one end of reboiler is connected with the one end of second stop valve, the other end of second stop valve is connected with first steam condensate water pitcher. The device improves the utilization rate of heat energy, is favorable for carrying out a gas-liquid separation process on the steam condensate, and reduces the pollution of waste residues and waste gases to the environment.
Chinese patent CN209612248U discloses a vapor condensate recycling system, which comprises a brine heating cooler, a first control valve assembly, a first condensate recovery tank and a first condensate recovery pump assembly, a dechlorinated dilute brine heater, a second control valve assembly, a filtered brine heater, a third control valve assembly, a cathode liquid cooler and a fourth control valve assembly, which are connected in series and then connected in parallel, and then connected in series with a second condensate recovery tank and a second condensate recovery pump assembly, the first condensate recovery pump assembly and the second condensate recovery pump assembly are connected in parallel and then connected in series with a vapor condensate switch valve and a synthesis furnace pure water circulation tank, and a conductivity detector is connected in parallel and arranged on a vapor condensate recovery header pipe at the front end of the vapor condensate switch valve and electrically connected with the vapor condensate switch valve. The utility model discloses a can realize the high standard retrieval and utilization of steam condensate, reduce the pure water consumption, reduce the outer row of sewage, nevertheless the structure is complicated, and it is more to relate to and move equipment, and manufacturing cost is high, operates inconveniently.
In a general steam condensate recovery device, an adopted centrifugal pump is easy to generate cavitation when conveying saturated hot water, and an impeller of the pump is damaged, so that the pump cannot work normally. Water temperatures in excess of 80 c will increase the positive head at the centrifugal pump inlet to prevent cavitation. The water tank is usually elevated, but the water tank is elevated, so that condensed water needs to climb up, backwater is not smooth, and the installation, the maintenance and the operation are inconvenient. In consideration of the characteristics of cold areas and the defects of the prior art, the invention is necessary to provide a device which has the advantages of automatic control, simple configuration, convenient operation, low energy consumption, low cost, small occupied area and stable operation.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides an automatic recovery device for steam condensate.
The technical scheme adopted by the invention is as follows: an automatic recovery device for steam condensate comprises a non-condensable gas cooler, a condensate collecting tank, a liquid guide pipe, a check valve, a condensate conveying tank, a low liquid level switch, a high liquid level switch, an air inlet pipe, an exhaust pipe, a control valve and a control box which are sequentially connected. The upper part of the condensate collecting tank is provided with a plurality of condensate liquid inlet pipes, a pipeline is also arranged to be connected with the non-condensable gas cooler, and the upper part of the non-condensable gas cooler is provided with an exhaust port; a liquid guide pipe is arranged at the lower part of the condensate collecting tank and connected with the condensate conveying tank, and a check valve is arranged on the liquid guide pipe; the side wall of the condensate conveying tank is provided with a low liquid level switch and a high liquid level switch, the upper part of the condensate conveying tank is provided with an air inlet pipe and an air outlet pipe, the air inlet pipe and the air outlet pipe are respectively provided with a control valve, the air inlet pipe is connected with a compressed gas pipeline, and the air outlet pipe is connected to a pipeline between the non-condensable gas cooler and the condensate collecting tank; the control signals of the low liquid level switch, the high liquid level switch and the control valve are respectively connected with the control box; and a condensate collecting pipe is also arranged on the side wall of the condensate conveying tank, and a check valve is arranged on the condensate collecting pipe.
The automatic recovery unit of steam condensate, noncondensable gas cooler adopts the air condensation, and the heat exchange tube adopts vertical distribution.
The automatic recovery unit of steam condensate, condensate holding vessel are the tube-shape and level is placed, its outside sets up the liquid level bypass, still sets up the level gauge on the liquid level bypass.
The automatic recovery unit of steam condensate, compressed gas is compressed air, compressed nitrogen gas etc. other compressed gas that do not dissolve mutually with steam condensate.
The pressure of the compressed gas is greater than that of the condensate in the condensate conveying tank.
The automatic recovery unit of steam condensate, pipeline respectively installation hand valve before and after the control valve.
The installation positions of the non-condensable gas cooler, the condensate collecting tank and the condensate conveying tank of the automatic vapor condensate recovery device are sequentially from high to low.
The automatic recovery device for the steam condensate has the beneficial effects that: (1) the non-condensable gas cooler provided by the invention adopts air condensation, and the heat exchange tubes are vertically distributed, so that no liquid accumulation dead angle exists, and the problem of tube freezing can be avoided in winter; (2) the invention adopts the compressed gas as a power source to convey the condensate without considering the problems of water temperature and cavitation, and simultaneously protects the conveying pipeline without generating corrosion and secondary pollution; (3) the invention does not need power equipment, has simple configuration, convenient operation and high automation degree, and not only reduces the labor intensity, but also reduces the production cost.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure 1, 1-a condensate collecting pipe, 2-a low liquid level switch, 3-a high liquid level switch, 4-a control valve I, 5-an air inlet pipe, 6-a control box, 7-an air outlet pipe, 8-an air outlet, 9-a non-condensable gas cooler, 10-an air inlet pipe, 11-a condensate collecting tank, 12-a control valve II, 13-a liquid guide pipe, 14-a condensate conveying tank, 15-a check valve I and 16-a check valve II.
Detailed Description
Referring to the attached drawing 1, the embodiment comprises a non-condensable gas cooler 9, a condensate collecting tank 11, a liquid guide pipe 13, a check valve I15, a condensate conveying tank 14, a check valve II 16, a condensate collecting pipe 1, a low liquid level switch 2, a high liquid level switch 3, an air inlet pipe 5, an air outlet pipe 7, a control valve I4, a control valve II 12 and a control box 6 which are connected in sequence. The upper part of the condensate collecting tank 11 is provided with a plurality of condensate liquid inlet pipes 10, a pipeline is also arranged to be connected with the non-condensable gas cooler 9, and the upper part of the non-condensable gas cooler 9 is provided with an exhaust port 8; a liquid guide pipe 13 is arranged at the lower part of the condensate collecting tank 11 and connected with a condensate conveying tank 14, and a check valve I15 is arranged on the liquid guide pipe 13; a low liquid level switch 2 and a high liquid level switch 3 are arranged on the side wall of a condensate conveying tank 14, an air inlet pipe 5 and an air outlet pipe 7 are arranged at the upper part of the condensate conveying tank 14, a control valve I4 and a control valve II 12 are respectively arranged on the air inlet pipe and the air outlet pipe, the air inlet pipe 5 is connected with a compressed gas pipeline, and the air outlet pipe 7 is connected to a pipeline between a non-condensable gas cooler and a condensate collecting tank; control signals of the low liquid level switch 2, the high liquid level switch 3, the control valve I4 and the control valve II 12 are respectively connected with the control box 6; and a condensate collecting pipe 1 is also arranged on the side wall of the condensate conveying tank, and a check valve II 16 is arranged on the condensate collecting pipe 1.
The difference of another embodiment is that the non-condensable gas cooler adopts air condensation and the heat exchange tubes are vertically distributed.
The other embodiment is different in that the condensate collecting tank is cylindrical and horizontally arranged, a liquid level bypass is arranged on the outer side of the condensate collecting tank, and a liquid level meter is further arranged on the liquid level bypass.
Another embodiment differs in that the compressed gas is compressed air.
Another embodiment differs in that the compressed gas is compressed nitrogen.
Another embodiment differs in that the pressure of the compressed gas is greater than the pressure of the condensate in the condensate delivery tank.
Another embodiment differs in that the control valve is provided with a hand valve in each of the front and rear pipelines.
Another embodiment differs in that the installation positions of the non-condensable gas cooler, the condensate collection tank and the condensate delivery tank are arranged from high to low in this order.
The working process and principle of the invention are as follows:
the outside steam condensate enters a condensate collecting tank 11 through a liquid inlet pipe 10, exhaust steam generated in the condensate collecting tank enters a non-condensable gas cooler 9, the exhaust steam is condensed by air and then flows back to the condensate collecting tank 11, and the non-condensable gas is discharged into the atmosphere through an exhaust port 8; potential energy generated by the condensate in the condensate collecting tank through the liquid level difference flows into a condensate conveying tank 14 from a liquid guide pipe 13 through a check valve I15; when the high liquid level switch 3 detects that the liquid level of the condensate conveying tank 14 reaches a high level, a signal is sent to the control box 6, the control valve I4 on the air inlet pipe 5 is opened, the control valve II 12 on the air outlet pipe 7 is closed, and under the pressurization of compressed gas, condensate is discharged from the condensate conveying tank 14 through the condensate collecting pipe 1 and the check valve II 16; when the low liquid level switch 2 detects that the liquid level of the condensate conveying tank 14 reaches a low level, a signal is sent to the control box 6, the control valve I4 on the air inlet pipe 5 is closed, the control valve II 12 on the exhaust pipe 7 is opened, and a small amount of non-condensable gas in the condensate conveying tank 14 is sent to the non-condensable gas cooler 9 from the exhaust pipe 7 through the control valve II 12 and flows back to the condensate collecting tank 11 after being condensed by air; potential energy generated by the liquid level difference of the steam condensate in the condensate collecting tank flows into the condensate conveying tank 14 from the liquid guide pipe 13 through the check valve I15 to perform the next cycle.
Claims (7)
1. An automatic recovery device of steam condensate is characterized by comprising a non-condensable gas cooler, a condensate collecting tank, a liquid guide pipe, a check valve, a condensate conveying tank, a low liquid level switch, a high liquid level switch, an air inlet pipe, an air exhaust pipe, a control valve and a control box which are connected in sequence; the upper part of the condensate collecting tank is provided with a plurality of condensate liquid inlet pipes, a pipeline is also arranged to be connected with the non-condensable gas cooler, the upper part of the non-condensable gas cooler is provided with an exhaust port, exhaust steam generated in the condensate collecting tank enters the non-condensable gas cooler, the exhaust steam flows back to the condensate collecting tank after being condensed, and the non-condensable gas is exhausted to the atmosphere through the exhaust port; a liquid guide pipe is arranged at the lower part of the condensate collecting tank and connected with the condensate conveying tank, a check valve is arranged on the liquid guide pipe, and the condensate in the condensate collecting tank flows into the condensate conveying tank from the liquid guide pipe through potential energy generated by liquid level difference;
the side wall of the condensate conveying tank is provided with a low liquid level switch and a high liquid level switch, the upper part of the condensate conveying tank is provided with an air inlet pipe and an air outlet pipe, the air inlet pipe and the air outlet pipe are respectively provided with a control valve, the air inlet pipe is connected with a compressed gas pipeline, and the air outlet pipe is connected to a pipeline between the non-condensable gas cooler and the condensate collecting tank; the control signals of the low liquid level switch, the high liquid level switch and the control valve are respectively connected with the control box; a condensate collecting pipe is also arranged on the side wall of the condensate conveying tank, and a check valve is arranged on the condensate collecting pipe;
when the high liquid level switch detects that the liquid level of the condensate conveying tank reaches a high level, the control valve on the air inlet pipe is opened, the control valve on the exhaust pipe is closed, and the condensate is discharged from the condensate conveying tank through the condensate collecting pipe and the check valve under the pressurization of the compressed gas; when the low liquid level switch detects that the liquid level of the condensate conveying tank reaches a low level, the control valve on the air inlet pipe is closed, the control valve on the exhaust pipe is opened, and a small amount of non-condensable gas in the condensate conveying tank is conveyed to the non-condensable gas cooler from the exhaust pipe to be condensed and then flows back to the condensate collecting tank.
2. An apparatus for automatically recycling steam condensate as set forth in claim 1 wherein the non-condensable gas cooler is air cooled and the heat exchange tubes are vertically spaced.
3. The automatic vapor condensate recovery apparatus of claim 1, wherein the condensate collection tank is cylindrical and horizontally disposed, and has a liquid level bypass provided on an outer side thereof, and a liquid level gauge provided on the liquid level bypass.
4. The automatic vapor condensate recovery apparatus of claim 1, wherein the compressed gas is compressed air, compressed nitrogen, or other compressed gas immiscible with the vapor condensate.
5. The automatic vapor condensate recovery apparatus of claim 4 wherein the pressure of the compressed gas is greater than the pressure of the condensate in the condensate delivery tank.
6. An apparatus for automatically recycling steam condensate as set forth in claim 1 wherein hand valves are installed in the front and rear lines of the control valve.
7. The automatic vapor condensate recovery apparatus of claim 1, wherein the noncondensable gas cooler, the condensate collection tank, and the condensate delivery tank are installed in the order of high to low.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011198000.9A CN112274961A (en) | 2020-10-30 | 2020-10-30 | Automatic recovery unit of steam condensate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011198000.9A CN112274961A (en) | 2020-10-30 | 2020-10-30 | Automatic recovery unit of steam condensate |
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| Publication Number | Publication Date |
|---|---|
| CN112274961A true CN112274961A (en) | 2021-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011198000.9A Pending CN112274961A (en) | 2020-10-30 | 2020-10-30 | Automatic recovery unit of steam condensate |
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| CN (1) | CN112274961A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113244648A (en) * | 2021-03-15 | 2021-08-13 | 浙江石油化工有限公司 | Process condensate recovery device of refining device |
-
2020
- 2020-10-30 CN CN202011198000.9A patent/CN112274961A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113244648A (en) * | 2021-03-15 | 2021-08-13 | 浙江石油化工有限公司 | Process condensate recovery device of refining device |
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