CN219064190U - Steam condensate drainage and residual steam recycling device - Google Patents
Steam condensate drainage and residual steam recycling device Download PDFInfo
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- CN219064190U CN219064190U CN202223232931.3U CN202223232931U CN219064190U CN 219064190 U CN219064190 U CN 219064190U CN 202223232931 U CN202223232931 U CN 202223232931U CN 219064190 U CN219064190 U CN 219064190U
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Abstract
The utility model provides a steam condensate drainage and residual steam recycling device which comprises a heat exchange device steam condensate discharge pipeline, wherein the heat exchange device steam condensate discharge pipeline stretches into the bottom of a steam condensate recovery storage tank from the top of the steam condensate recovery storage tank, the steam condensate recovery storage tank is provided with a water seal, the heat exchange device steam condensate discharge pipeline is inserted into the bottom of a water seal liquid level, a baffle plate is arranged in the steam condensate recovery storage tank, and a liquid level meter is arranged on the outer side of the steam condensate recovery storage tank. The utility model can realize efficient drainage of heat exchange equipment, recycling of condensate, saving steam consumption and realizing remote system automatic control of the device.
Description
Technical Field
The utility model relates to a device for draining steam condensate and recycling residual steam, which can realize efficient drainage of heat exchange equipment, recycling of condensate, saving steam consumption and realizing automatic control of a remote system of the device.
Background
Steam is the most common material medium in chemical industry production enterprises, and is mainly widely applied to the aspects of material heating, distillation stripping, pipeline equipment blowing, fire fighting, freezing prevention, condensation prevention and the like. In the polyvinyl chloride production process, steam is used as a heat source in a large amount, in particular to a process device for heating and exchanging heat of materials, such as procedures of drying, steam stripping, feed recovery and the like of a polymerization device. The evaporation enthalpy is released by heat exchange during the heating process of the steam, so that a large amount of condensed water is generated by energy reduction, and the condensed water is discharged or collected by a drainage device for use. At present, most production device steam heat exchange equipment adopts a drain valve to drain water, although the steam heat exchange equipment has the advantages of continuous drainage, cavitation damage prevention, steam leakage and the like, and meanwhile has different defects: 1. the steam conveying pipeline is generally made of carbon steel, so that the possibility of generating impurities is high, a drain valve is easy to block, saturated steam condensate cannot be conveyed in time, and the equipment is damaged due to the phenomenon of 'water hammer'; 2. in winter, if the drain valve fails, the heat tracing pipeline and the heat exchange equipment are not timely found to be frozen; 3. in an environment easy to corrode, the drain valve sealing component is easy to fail, the drain effect cannot be achieved, a large amount of steam is wasted, and the production cost is increased; 4. in equipment or devices with large steam consumption, multiple groups or large drain valve groups are required to be installed, and cost control is increased.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art, and provides a steam condensate drainage and residual steam recycling device, which is a brand-new device for reducing steam consumption and improving steam condensate recycling, and has the advantages of high automation degree, strong continuous operation, energy saving, consumption reduction, safety, environmental protection, automatic control and reduced manual operation.
For this purpose, the utility model adopts the following technology:
the steam condensate drainage and residual steam recycling device comprises a heat exchange device steam condensate discharge pipeline, wherein the heat exchange device steam condensate discharge pipeline extends into the bottom of a steam condensate recovery storage tank from the top of the steam condensate recovery storage tank, the steam condensate recovery storage tank is provided with a water seal, the heat exchange device steam condensate discharge pipeline is inserted into the bottom of a water seal liquid level, a baffle plate is arranged in the steam condensate recovery storage tank, and a liquid level meter is arranged on the outer side of the steam condensate recovery storage tank; the bottom of the steam condensate recovery storage tank is provided with a steam condensate conveying pipeline, and the steam condensate conveying pipeline is sequentially provided with a second stop valve, a condensate conveying pump, a third stop valve, a condensate conveying regulating valve, a fourth stop valve and a pressure transmitter; the top is equipped with the shower head in the steam condensate recovery storage tank, the shower head is connected and is sprayed the return line, be equipped with fifth stop valve, backward flow on the return line that sprays in proper order and spray governing valve, sixth stop valve, the backward flow sprays the pipeline opposite side and connects on the steam condensate conveying pipeline between condensate conveying pump and third stop valve.
The condensate conveying regulating valve is interlocked with the liquid level meter, the condensate conveying regulating valve is connected with the liquid level meter and the first PLC controller, the reflux spraying regulating valve is interlocked with the pressure transmitter, and the reflux spraying regulating valve is connected with the pressure transmitter and the second PLC controller.
The baffle is a two-layer triangular baffle.
The heat exchange equipment steam condensate discharge pipeline is provided with a first stop valve, the heat exchange equipment steam condensate discharge pipeline at the front end of the first stop valve is provided with a steam condensate discharge pipeline, and the steam condensate discharge pipeline is provided with a seventh stop valve and a drain valve.
The bottom of the steam condensate recovery storage tank is provided with a sewage drain pipe, and the sewage drain pipe is provided with a sewage drain stop valve.
And a residual steam emptying pipeline is arranged at the top end of the steam condensate recovery storage tank.
The utility model has the beneficial effects that: the utility model can realize efficient drainage of heat exchange equipment, recycling of condensate, saving steam consumption and realizing remote system automatic control of the device. By arranging the baffle plate and the spraying device and combining the water seal device, the device not only plays a role in separating vapor from liquid, but also thoroughly replaces a common drainage device by condensing and recycling residual steam for the second time and the third time. The device can achieve the purposes of remote monitoring and continuous operation by arranging the automatic control device, and the device can completely recycle the mixture of steam and condensate discharged by heat exchange equipment, thereby solving the following aims of open source throttling, cost reduction and synergy in chemical production. When the system is in fault, the pressure of the condensate recovery storage tank is relieved through the blow-down pipe under the condition of pressure holding.
Drawings
FIG. 1 is a schematic diagram of a vapor condensate recovery tank according to the present utility model;
FIG. 2 is a schematic view of the piping connection and valve arrangement of the present utility model;
in the figure: 1-a steam condensate recovery storage tank; 2-a heat exchange equipment steam condensate discharge pipeline; 3-a first shut-off valve; 4-a baffle plate; 5-a spray header; 6-spraying a reflux pipeline; 7-residual steam emptying pipelines and 8-liquid level meters; 9-a sewage drain pipe; 10-a sewage pipeline stop valve; 11-a first PLC controller; 12-a second PLC controller; 13-a central control computer; 14-a fifth shut-off valve; 15-a reflux spray regulating valve; 16-a sixth shut-off valve; 17-a steam condensate delivery pipe; 18-a second shut-off valve; 19-a condensate delivery pump; 20-a third shut-off valve 20; 21-a condensate conveying regulating valve; 22-a fourth shut-off valve; a 23-pressure transmitter; 24-a steam condensate discharge pipeline; 25-seventh shut-off valve; 26-drain valve.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
As shown in figures 1-2, the self-control device for steam condensate drainage and residual steam recovery comprises a steam condensate discharge pipeline 2 of heat exchange equipment, wherein the steam condensate discharge pipeline 2 of the heat exchange equipment extends into the bottom of a steam condensate recovery storage tank 1 from the top of the steam condensate recovery storage tank 1, the steam condensate recovery storage tank 1 is provided with a water seal, the steam condensate discharge pipeline 2 of the heat exchange equipment is inserted into the bottom of the water seal liquid level, the purpose of steam-liquid separation and the function of a drain valve are achieved, the phenomenon of 'water hammer' caused by unsmooth drainage of the drain valve can be eliminated, equipment is effectively protected, and large-scale and multi-group heat exchange equipment using steam are facilitated to drain simultaneously. The steam condensate recovery storage tank 1 is made of stainless steel materials, and can effectively control condensate conductivity. The heat exchange equipment steam condensate discharge pipeline 2 is provided with a first stop valve 3, the heat exchange equipment steam condensate discharge pipeline 2 at the front end of the first stop valve 3 is provided with a steam condensate discharge pipeline 24, and the steam condensate discharge pipeline 24 is provided with a seventh stop valve 25 and a drain valve 26, so that the fault or overhaul use of the steam condensate recovery storage tank 1 is facilitated.
The baffle plate 4 is arranged in the steam condensate recovery storage tank 1, the baffle plate 4 is a two-layer triangular baffle plate, the angle of the triangular baffle plate is 120 degrees, so that the steam in the steam condensate recovery storage tank changes the flow direction to perform secondary condensation, the baffle plate can not only prevent the steam from rising and condense residual steam, but also play the role of an upper-layer steam condensate overflow plate, the contact area between the steam and the condensate and the heat exchange time are increased, and the residual steam condensation effect is enhanced. The outside of the steam condensate recovery storage tank 1 is provided with a liquid level meter 8, the liquid level meter 8 is a differential pressure type liquid level meter, and the liquid level is controlled to be constant through a PLC (programmable logic controller) 11 in linkage with a condensate conveying regulating valve 21.
The bottom of the steam condensate recovery storage tank 1 is provided with a steam condensate conveying pipeline 17, and the steam condensate conveying pipeline 17 is sequentially provided with a second stop valve 18, a condensate conveying pump 19, a third stop valve 20, a condensate conveying regulating valve 21, a fourth stop valve 22 and a pressure transmitter 23; the top is equipped with shower head 5 in the vapour condensate recovery storage tank 1, shower head 5 connects sprays reflux pipeline 6, sprays and is equipped with fifth stop valve 14, backward flow on the reflux pipeline 6 in proper order and sprays governing valve 15, sixth stop valve 16, and the opposite side is connected on the reflux spray pipeline 6 on the vapour condensate transfer pipeline 17 between condensate transfer pump 19 and third stop valve 20, and the backward flow sprays pipeline 6 and sprays the condensate backward flow in the vapour condensate transfer pipeline to vapour condensate recovery storage tank 1 and be used for condensing the residual steam. Through the condensate delivery pump 19 and the backflow spray pipeline 6, the pump pressure can be kept stable, and the spray head can spray water, so that the dual-purpose spray pump has dual functions.
The condensate conveying regulating valve 21 is interlocked with the liquid level meter 8, the condensate conveying regulating valve 21 is connected with the liquid level meter 8 and the first PLC 11, the reflux spraying regulating valve 15 is interlocked with the pressure transmitter 23, and the reflux spraying regulating valve 15 is connected with the pressure transmitter 23 and the second PLC 12.
The PLC controller is used for interlocking pressure and liquid level with the regulating valve, and the PLC controller is used for transmitting interlocking and control signals to the central control computer, so that automatic monitoring and continuous operation can be realized.
The top end of the steam condensate recovery storage tank is provided with a residual steam emptying pipeline 7, so that incomplete recovery of steam is prevented from being suppressed, and the drainage of heat exchange equipment or pipelines is prevented. The bottom of the steam condensate recovery storage tank 1 is provided with a drain pipe 9, and the drain pipe 9 is provided with a drain stop valve 10.
And 2 layers of baffle plates and a reflux spraying device are arranged, residual steam which 'penetrates' the water seal layer collides with the baffle plates to form new liquid drops, the accumulated liquid drops gradually increase along with the continuous rising of the steam to form a water flow which falls to the water seal layer, a small amount of uncondensed steam is cooled by spray water at the top of the storage tank again, and is condensed for three times, so that the steam is basically 'eliminated' completely, and the whole recycling of the residual steam and condensed water is realized.
The operation process is as follows:
1. the device has the advantages that all pipeline pipes in the device are purged, pressurized and leak tested before operation, metal winding gaskets are used at pipeline flange joints, instrument accuracy is debugged, a PLC and a central control computer are debugged through analog value signals, and linkage settings and the like meet logic requirements.
2. All valves on the steam condensate conveying pipeline 17, the reflux spraying pipeline 6 and the steam condensate discharging bypass pipeline 24 are closed.
3. The stop valve 3 is opened, the steam condensate is discharged to the condensate recovery storage tank 1 through the steam condensate discharge pipeline 2 of the heat exchange equipment, when the liquid level of the condensate recovery storage tank 1 reaches 50% through the monitoring of the liquid level meter 8, the second stop valve 18 at the front end of the condensate conveying pump 19 is slowly opened to perform pumping operation, meanwhile, the fifth stop valve 14 and the sixth stop valve 16 on the spraying reflux pipeline 6 are slowly opened, the condensate conveying pump 19 is started, the reflux spraying regulating valve 15 is opened to regulate the pump pressure of the condensate conveying pump 19, and the liquid in the steam condensate recovery storage tank 1 is sprayed through the steam condensate recovery storage tank 1.
4. The liquid level of the condensate recovery storage tank 1 reaches 60%, a third stop valve 20 and a fourth stop valve 22 on the steam condensate conveying pipeline 17 are slowly opened, and the condensate conveying regulating valve 21 is controlled to convey condensate to condensate procedures required by other sequences.
5. After the device runs normally, the process parameters required by the liquid level meter 8 and the pressure transmitter 23 are set in the central control computer 13, and the reflux spray regulating valve 15 and the condensate conveying regulating valve 21 are set to be in an automatic state, so that the automatic control and continuous running of the device can be realized.
6. In the fault or maintenance state of the device, the condensate of the heat exchange equipment can be discharged through the steam condensate discharging pipeline 24, and no factors affecting the normal production exist.
Claims (6)
1. The utility model provides a steam condensate drainage and surplus steam recycle device which characterized in that: the heat exchange device steam condensate discharging pipeline extends into the bottom of the steam condensate recovery storage tank from the top of the steam condensate recovery storage tank, the steam condensate recovery storage tank is provided with a water seal, the heat exchange device steam condensate discharging pipeline is inserted into the bottom of the water seal liquid level, a baffle plate is arranged in the steam condensate recovery storage tank, and a liquid level meter is arranged on the outer side of the steam condensate recovery storage tank; the bottom of the steam condensate recovery storage tank is provided with a steam condensate conveying pipeline, and the steam condensate conveying pipeline is sequentially provided with a second stop valve, a condensate conveying pump, a third stop valve, a condensate conveying regulating valve, a fourth stop valve and a pressure transmitter; the top is equipped with the shower head in the steam condensate recovery storage tank, the shower head is connected and is sprayed the return line, be equipped with fifth stop valve, backward flow on the return line that sprays in proper order and spray governing valve, sixth stop valve, the backward flow sprays the pipeline opposite side and connects on the steam condensate conveying pipeline between condensate conveying pump and third stop valve.
2. The steam condensate drain and residual steam recycling device according to claim 1, wherein: the baffle is a two-layer triangular baffle.
3. The steam condensate drain and residual steam recycling device according to claim 1, wherein: the heat exchange equipment steam condensate discharge pipeline is provided with a first stop valve, the heat exchange equipment steam condensate discharge pipeline at the front end of the first stop valve is provided with a steam condensate discharge pipeline, and the steam condensate discharge pipeline is provided with a seventh stop valve and a drain valve.
4. The steam condensate drain and residual steam recycling device according to claim 1, wherein: the condensate conveying regulating valve is interlocked with the liquid level meter, the condensate conveying regulating valve is connected with the liquid level meter and the first PLC controller, the reflux spraying regulating valve is interlocked with the pressure transmitter, and the reflux spraying regulating valve is connected with the pressure transmitter and the second PLC controller.
5. The steam condensate drain and residual steam recycling device according to claim 1, wherein: the bottom of the steam condensate recovery storage tank is provided with a sewage drain pipe, and the sewage drain pipe is provided with a sewage drain stop valve.
6. The steam condensate drain and residual steam recycling device according to claim 1, wherein: and a residual steam emptying pipeline is arranged at the top end of the steam condensate recovery storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223232931.3U CN219064190U (en) | 2022-12-04 | 2022-12-04 | Steam condensate drainage and residual steam recycling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223232931.3U CN219064190U (en) | 2022-12-04 | 2022-12-04 | Steam condensate drainage and residual steam recycling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219064190U true CN219064190U (en) | 2023-05-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223232931.3U Active CN219064190U (en) | 2022-12-04 | 2022-12-04 | Steam condensate drainage and residual steam recycling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219064190U (en) |
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2022
- 2022-12-04 CN CN202223232931.3U patent/CN219064190U/en active Active
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