CN210103609U - Prevent wet-type oxidation reaction system of jam - Google Patents
Prevent wet-type oxidation reaction system of jam Download PDFInfo
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- CN210103609U CN210103609U CN201920427760.9U CN201920427760U CN210103609U CN 210103609 U CN210103609 U CN 210103609U CN 201920427760 U CN201920427760 U CN 201920427760U CN 210103609 U CN210103609 U CN 210103609U
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Abstract
The utility model relates to a sewage treatment device, and discloses an anti-clogging wet oxidation reaction system, which comprises a preheating sedimentation tank, a high-pressure reactor, a primary feed pump and a secondary booster pump; the bottom of the preheating sedimentation tank is provided with a raw water inlet, the side wall of the preheating sedimentation tank is provided with a raw water outlet, and a heat exchange device is arranged in the preheating sedimentation tank; the heat exchange device is provided with a high-temperature water inlet and a low-temperature water outlet; the high-pressure reactor is provided with a feed inlet and a discharge outlet; the raw water outlet is connected with the feed inlet through a pipeline, and the discharge outlet is connected with the high-temperature water inlet; the primary feed pump is arranged on a pipeline of a raw water inlet, and the secondary booster pump is arranged on a pipeline between a raw water outlet and the feed inlet. The whole preheating process of raw water is carried out in preheating the gunbarrel, if there is solid to appear in preheating the in-process, then the solid deposits to preheating gunbarrel bottom, can not cause the jam of feed line and heat exchanger, has ensured the stability of whole reaction system operation.
Description
Technical Field
The utility model relates to a sewage treatment plant especially relates to a prevent wet-type oxidation reaction system of jam.
Background
The wet oxidation technology is a process method for removing organic matters in the sewage by heating the sewage to 150-320 ℃ and reacting with oxygen in the air. The method can directly treat the sewage with high organic matters, high salt and more toxic and harmful components, and has much lower energy consumption compared with incineration and other methods. After the wet water is oxidized, toxic and harmful substances in the sewage are degraded into low-molecular organic salt, so that secondary pollution to the environment is avoided, and the method is adopted by many enterprises.
For example, chinese patent publication No. CN108675434A discloses a circulating wet oxidation system including a heater for heating sewage, an oxidation tower for oxidizing the heated sewage to obtain oxidized water, an air pressure unit for supplying air to the oxidation tower, a heat exchanger for heat-exchanging the oxidized water with the sewage brought into the heater, an intermediate tank for diluting the sewage to be introduced into the heater with the oxidized water, and a circulating unit for conveying the oxidized water to the intermediate tank.
Chinese patent publication No. CN206721010U discloses an energy-saving wet sludge oxidation apparatus, which comprises a sludge storage tank, wherein an outlet of the sludge storage tank is connected with a sludge inlet of a preprocessor, a sludge outlet of the preprocessor is connected with an inlet of a first heat exchange end of a coil heat exchanger, a port of a first heat exchange end of the coil heat exchanger is connected with a sludge inlet of a mixing tank, an outlet of the mixing tank is connected with a sludge inlet of an oxidation reactor through an electromagnetic heater, a sludge outlet of the oxidation reactor is connected with an inlet of a first heat exchange end of a tube heat exchanger, an outlet of the first heat exchange end of the tube heat exchanger is connected with an inlet of a second heat exchange end of the coil heat exchanger, an outlet of the second heat exchange end of the coil heat exchanger is connected; and the separation liquid outlet of the plate-and-frame filter press is connected with the liquid inlet of the flash tank, the liquid outlet of the flash tank is connected with the inlet of the second heat exchange end of the tube heat exchanger through the heavy metal treatment unit, and the outlet of the second heat exchange end of the tube heat exchanger is connected with the liquid inlet of the mixing tank.
At present, generally adopt U type pipe or shell and tube heat exchanger to carry out heat exchange among the wet oxidation device, preheat the raw water that gets into high pressure reactor to the heat exchanger directly links to each other with high pressure reactor, because different solubility or the reaction can appear along with temperature variation in salinity and organic matter in the raw water, the solid phenomenon of appearing is appeared easily, thereby blocks up feed line and heat exchanger. After the blockage occurs, equipment and pipelines are generally cleaned by a physical and chemical method, so that the long-term operation capability of the device is seriously influenced; meanwhile, the heat exchanger is directly connected with the high-pressure reactor, so that the bearing capacity of the heat exchange equipment is equivalent to that of the high-pressure reactor, and the service life of the heat exchange equipment is shortened.
SUMMERY OF THE UTILITY MODEL
The utility model provides a to the not enough of prior art existence, the utility model provides a prevent wet-type oxidation reaction system of jam can effectively avoid sewage to separate out the solid because of preheating and block up equipment and pipeline, improves wet-type oxidation reaction device's operating stability.
The specific technical scheme is as follows:
an anti-clogging wet oxidation reaction system comprises a preheating sedimentation tank, a high-pressure reactor, a primary feeding pump and a secondary booster pump;
the bottom of the preheating sedimentation tank is provided with a raw water inlet, the side wall of the preheating sedimentation tank is provided with a raw water outlet, and a heat exchange device is arranged in the preheating sedimentation tank;
the heat exchange device is provided with a high-temperature water inlet and a low-temperature water outlet;
the high-pressure reactor is provided with a feed inlet and a discharge outlet;
the raw water outlet is connected with the feed inlet through a pipeline, and the discharge outlet is connected with the high-temperature water inlet;
the primary feed pump is arranged on a pipeline of a raw water inlet, and the secondary booster pump is arranged on a pipeline between a raw water outlet and the feed inlet.
The sewage raw water to be treated enters a preheating sedimentation tank from a raw water inlet through a primary feeding pump, is preheated in the preheating sedimentation tank, is discharged from a raw water outlet after being preheated, is pumped into a high-pressure reactor through a secondary booster pump, is subjected to wet oxidation reaction in the high-pressure reactor, is discharged from a discharge port after the reaction is finished, enters a heat exchanger from a high-temperature water inlet of the heat exchanger, is subjected to heat exchange with the raw water in the preheating sedimentation tank, and is discharged from a low-temperature water outlet of the heat exchanger.
The whole preheating process of raw water is carried out in preheating the gunbarrel, if there is the solid to appear in preheating the in-process, then the solid deposits to preheating the gunbarrel bottom, through in the preheating raw water rethread secondary booster pump entering high pressure reactor after the sediment, can not cause the jam of feed line and heat exchanger, has ensured the stability of whole reaction system operation.
On the other hand, the preheating precipitation tank is connected with the high-pressure reactor through the secondary booster pump, the medium-low pressure device and the high-pressure device are separated, and the service life of the heat exchanger cannot be influenced.
Preferably, the bottom of the preheating sedimentation tank is provided with a sewage draining outlet. The solid separated out in the preheating precipitation tank is precipitated at the bottom of the preheating precipitation tank and can be discharged through a sewage outlet.
Preferably, the bottom of the preheating settling tank is provided with a steam inlet, and the top of the preheating settling tank is provided with a pressure control system.
When the heat exchange is performed by the heat exchanger, the raw water is not heated to the reaction temperature enough, the raw water can be heated again by supplementing steam from the steam inlet, and the raw water can be preheated to the reaction temperature.
Furthermore, the wet oxidation reaction system is provided with a controller, a temperature sensor for measuring the temperature of raw water is arranged in the preheating sedimentation tank, and a flow control valve is arranged at the steam inlet;
if the temperature of the raw water does not reach the reaction temperature, the controller sends an instruction to open the flow control valve, steam is controlled to enter the flow, the raw water is added to the reaction temperature, and the accurate control of the preheating temperature of the raw water is realized.
Further, an aeration head is arranged at the steam inlet. Supplementary steam enters the preheating sedimentation tank in an aeration mode, so that the heating efficiency of the steam on the raw water is higher.
Preferably, the heat exchanger is a heat exchange coil or a heat exchange jacket.
Preferably, the high-temperature water inlet is positioned at the upper part of the heat exchanger, and the low-temperature water outlet is positioned at the lower part of the heat exchanger.
The high-temperature reaction effluent enters from the upper part of the heat exchanger, flows downwards and is discharged from the low-temperature water outlet at the lower part, and the raw water enters from the bottom of the preheating sedimentation tank and flows upwards. Therefore, the low-temperature raw water and the high-temperature reaction effluent form cross flow, so that the heat exchange efficiency between the low-temperature raw water and the high-temperature reaction effluent is higher.
Preferably, the preheating settling tank is provided with a liquid level meter, and the controller controls the flow of the secondary booster pump according to the index of the liquid level meter.
When the liquid level of the preheating sedimentation tank is below the raw water outlet, the controller sends an instruction to stop the secondary booster pump so as to prevent the secondary booster pump from idling;
when the liquid level of the preheating sedimentation tank is above the raw water outlet, the controller controls the flow of the secondary booster pump according to the height of the liquid level, so that the preheating sedimentation tank is matched with the raw water in the high-pressure reactor. When the liquid level of the preheating sedimentation tank is above the raw water outlet, the flow of the secondary booster pump can be properly increased when the liquid level is higher, and the flow of the secondary booster pump can be properly decreased when the liquid level is lowered.
In order to enhance the preheating effect of the raw water, the preheating settling tank can be arranged into multiple stages.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the whole preheating process of raw water is carried out in the preheating sedimentation tank, if solid is separated out in the preheating process, the solid is precipitated at the bottom of the preheating sedimentation tank, the precipitated preheating raw water enters the high-pressure reactor through the secondary booster pump, the blockage of a feeding pipeline and a heat exchanger cannot be caused, and the running stability of the whole reaction system is ensured;
(2) the preheating settling tank is connected with the high-pressure reactor through a secondary booster pump, the whole wet oxidation reaction system separates the medium-low pressure device from the high-pressure device, the pressure grade of the heat exchanger is reduced, the investment is reduced, the service life of the heat exchanger is prolonged, and the like.
Drawings
Fig. 1 is a schematic structural diagram of a wet oxidation reaction system.
Detailed Description
In order to further illustrate the technical means and effects of the present invention, the wet oxidation reaction system of the present invention will be described in detail with reference to the preferred embodiments and the accompanying drawings.
Fig. 1 is a schematic diagram of a wet oxidation reaction system according to an embodiment of the present invention. The wet oxidation reaction system includes a preheating precipitation tank 2, a high pressure reactor (not shown in the drawing), and a controller (not shown in the drawing).
The raw water inlet 21 is positioned at the bottom of the preheating sedimentation tank 2 and is connected with the primary water inlet pump 1 through a pipeline, the raw water outlet 22 is positioned on the side wall of the upper part of the preheating sedimentation tank 2 and is connected with the feed inlet of the high-pressure reactor through a pipeline, and the pipeline between the raw water outlet 22 and the feed inlet of the high-pressure reactor is provided with the secondary booster pump 3.
The inner wall of the preheating precipitation tank 2 is wound with a heat exchange coil 4, the discharge hole of the high-pressure reactor is connected with a high-temperature water inlet 41 at the top of the heat exchange coil 4, and a low-temperature water outlet 42 of the heat exchange coil 4 is positioned at the bottom of the heat exchange coil 4.
Raw water enters the preheating sedimentation tank 2 from a raw water inlet 21 through the primary water inlet pump 1 and flows upwards; the high-temperature reaction effluent in the high-pressure reactor flows out of the discharge hole, enters the heat exchange coil 4 from the high-temperature water inlet, flows from top to bottom in the heat exchange coil 4, forms cross flow with the low-temperature raw water in the preheating sedimentation tank 2 to exchange heat, and preheats the low-temperature raw water. The low-temperature outlet water after heat exchange is discharged from the low-temperature water outlet 42, and the preheated raw water flows out from the raw water outlet 22 and enters the high-pressure reactor through the secondary booster pump 3 to perform wet oxidation reaction.
The preheating sedimentation tank 2 is internally provided with a temperature sensor for measuring the temperature of raw water, the preheating sedimentation tank 2 is provided with a steam inlet 24, the steam inlet 24 is provided with a flow control valve and an aeration head, and the top of the preheating sedimentation tank 2 is provided with a pressure control valve 26. If after heat exchange through the heat exchange coil, the temperature of raw water does not reach reaction temperature, then the controller sends out the instruction and opens flow control valve, and control steam gets into flow, adds the raw water to reaction temperature, realizes the accurate control to raw water preheating temperature. In addition, the pressure in the preheating precipitation tank 2 can be adjusted by the pressure control valve 26.
The preheating sedimentation tank 2 is provided with a sewage outlet 23. The whole preheating process of raw water is carried out in preheating the gunbarrel 2, if there is solid to appear in preheating the in-process, then the solid deposits to preheating the gunbarrel 2 bottom, through in the preheating raw water rethread second grade booster pump 3 entering high pressure reactor after the sediment, can not cause the jam of feed line and heat exchanger, has ensured the stability of whole reaction system operation.
In addition, preheat the bottom termination of gunbarrel 2 and preheat 2 tank connections of gunbarrel through the flange, convenient to detach washs inside preheating gunbarrel 2.
The preheating sedimentation tank 2 is provided with a liquid level meter 25, and the controller controls the flow of the secondary booster pump 3 according to the index of the liquid level meter 25. When the liquid level of the preheating sedimentation tank 2 is below the raw water outlet 22, the controller sends an instruction to stop the secondary booster pump 3 so as to prevent the secondary booster pump 3 from idling; when the liquid level of the preheating sedimentation tank 2 is above the raw water outlet 22, the controller controls the flow rate of the secondary booster pump 3 according to the height of the liquid level, so that the preheating sedimentation tank 2 is matched with the raw water amount in the high-pressure reactor. Namely, when the liquid level of the preheating sedimentation tank 2 is above the raw water outlet 22, the flow rate of the secondary booster pump 3 can be properly increased when the liquid level is higher, and the flow rate of the secondary booster pump 3 can be properly decreased when the liquid level is lowered.
The preheating precipitation tank 2 is connected with the high-pressure reactor through a secondary booster pump 3, the whole wet oxidation reaction system separates the medium-low pressure device from the high-pressure device, the pressure grade of the heat exchanger is reduced, the investment is reduced, the service life of the heat exchanger is prolonged, and the like.
The above description is only exemplary of the preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the present invention.
Claims (8)
1. An anti-clogging wet oxidation reaction system is characterized by comprising a preheating sedimentation tank, a high-pressure reactor, a primary feed pump and a secondary booster pump;
the bottom of the preheating sedimentation tank is provided with a raw water inlet, the side wall of the preheating sedimentation tank is provided with a raw water outlet, and a heat exchange device is arranged in the preheating sedimentation tank;
the heat exchange device is provided with a high-temperature water inlet and a low-temperature water outlet;
the high-pressure reactor is provided with a feed inlet and a discharge outlet;
the raw water outlet is connected with the feed inlet through a pipeline, and the discharge outlet is connected with the high-temperature water inlet;
the primary feed pump is arranged on a pipeline of a raw water inlet, and the secondary booster pump is arranged on a pipeline between a raw water outlet and the feed inlet.
2. The anti-clogging wet oxidation reaction system according to claim 1, wherein the preheated settling tank has a drain outlet at a bottom thereof.
3. The anti-clogging wet oxidation reaction system according to claim 1, wherein the preheating settling tank is provided with a steam inlet at the bottom and a pressure control system at the top.
4. The anti-clogging wet oxidation reaction system according to claim 3, wherein the wet oxidation reaction system has a controller, a temperature sensor for measuring the temperature of the raw water is provided in the preheating settling tank, and a flow control valve is installed at the steam inlet;
if the temperature of the raw water does not reach the reaction temperature, the controller sends an instruction to open the flow control valve, control the steam to enter the flow, and add the raw water to the reaction temperature.
5. The anti-clogging wet oxidation reaction system according to claim 3, wherein an aeration head is installed at the steam inlet.
6. The anti-clogging wet oxidation reaction system of claim 1, wherein the heat exchanger is a heat exchange coil or a heat exchange jacket.
7. The anti-clogging wet oxidation reaction system according to claim 1 or 6, wherein the high temperature water inlet is located at an upper portion of the heat exchanger, and the low temperature water outlet is located at a lower portion of the heat exchanger.
8. The anti-clogging wet oxidation reaction system according to claim 4, wherein a level meter is installed on the preheating settling tank, and the controller controls the flow rate of the secondary booster pump according to the index of the level meter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920427760.9U CN210103609U (en) | 2019-04-01 | 2019-04-01 | Prevent wet-type oxidation reaction system of jam |
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| CN201920427760.9U CN210103609U (en) | 2019-04-01 | 2019-04-01 | Prevent wet-type oxidation reaction system of jam |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112239814A (en) * | 2020-11-11 | 2021-01-19 | 陕西省膜分离技术研究院有限公司 | Graded heating constant-temperature adsorption equipment and method for collecting rubidium lithium |
| CN113511788A (en) * | 2020-12-03 | 2021-10-19 | 清华大学 | Organic solid waste wet oxidation treatment system and treatment process thereof |
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2019
- 2019-04-01 CN CN201920427760.9U patent/CN210103609U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112239814A (en) * | 2020-11-11 | 2021-01-19 | 陕西省膜分离技术研究院有限公司 | Graded heating constant-temperature adsorption equipment and method for collecting rubidium lithium |
| CN113511788A (en) * | 2020-12-03 | 2021-10-19 | 清华大学 | Organic solid waste wet oxidation treatment system and treatment process thereof |
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