CN219117177U - Deamination system of high concentration ammonia nitrogen waste water - Google Patents
Deamination system of high concentration ammonia nitrogen waste water Download PDFInfo
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- CN219117177U CN219117177U CN202222748892.6U CN202222748892U CN219117177U CN 219117177 U CN219117177 U CN 219117177U CN 202222748892 U CN202222748892 U CN 202222748892U CN 219117177 U CN219117177 U CN 219117177U
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Abstract
The utility model relates to a deamination system of high-concentration ammonia nitrogen wastewater, belonging to the technical field of recycling of ammonia-containing wastewater. The utility model has the beneficial effects that the whole deamination system has lower pressure from top to bottom, the ammonia-containing wastewater enters from the top and is discharged from the bottom, low-pressure steam enters from the bottom and is discharged from the top, ammonia nitrogen in the high-concentration ammonia nitrogen wastewater is recovered in the form of high-concentration ammonia steam, and meanwhile, the heat energy of the system is recovered and utilized to the maximum extent, so that the aim of energy-saving deamination of the high-concentration ammonia nitrogen wastewater is achieved.
Description
Technical Field
The utility model belongs to the technical field of recycling of ammonia-containing wastewater, and particularly relates to an energy-saving deamination system for high-concentration ammonia-nitrogen wastewater, which can realize energy-saving removal and recycling of ammonia in the treatment process of the high-concentration ammonia-nitrogen wastewater.
Background
In the production process of the catalyst, an ammonium salt solution is generally adopted as an ion exchanger to improve the catalytic performance and the hydrothermal stability of the catalytic cracking catalyst, high-concentration ammonium salt is finally discharged in the form of ammonia nitrogen wastewater, the high ammonia nitrogen reduces the efficiency of the traditional biological treatment technology, according to statistics, about 250 ten thousand tons of ammonia nitrogen is discharged into water each year in China, excessive ammonia is discharged into surface water to cause serious environmental problems, the main problems caused by the ammonia nitrogen are (1) the oxidation of the ammonia nitrogen reduces the concentration of dissolved oxygen, thereby causing water quality to be reduced, (2) excessive ammonia nitrogen can cause microorganism to be increased, and (3) the ammonia nitrogen in a drinking water source can increase the water treatment cost, thereby further causing greater harm to animals and humans. On the other hand, ammonium is an important raw material required in the catalytic cracking catalyst production process. Therefore, aiming at high-concentration ammonia nitrogen wastewater, development of a treatment process capable of recycling is of great significance.
Disclosure of Invention
In order to solve the above-mentioned problems, the present utility model provides the following technical solutions.
A deamination system for high-concentration ammonia nitrogen wastewater comprises
A condenser arranged at the top of the deamination system;
the primary deamination device comprises a primary preheater for heating the ammonia nitrogen wastewater;
the secondary deamination device comprises a secondary preheater, a secondary stripping rectifying section filling section and a secondary stripping rectifying section spraying device, wherein the primary preheater is communicated with the bottom of the secondary preheater, the secondary stripping rectifying section spraying device is communicated with the bottom of the secondary heat exchanger, and the secondary stripping rectifying section filling section 3 is positioned above the secondary stripping rectifying section spraying device;
the three-stage deamination device comprises a three-stage preheater, a three-stage stripping rectifying section filling section and a three-stage stripping rectifying section spraying device, wherein the three-stage stripping rectifying section spraying device is communicated with the bottom of the three-stage preheater, the three-stage stripping rectifying section filling section is positioned above the three-stage stripping rectifying section spraying device, and the upper part of the three-stage stripping rectifying section filling section is communicated with the lower part of the two-stage stripping rectifying section spraying device;
the four-stage deamination device comprises a four-stage preheater, a four-stage stripping rectifying section filling section and a four-stage stripping rectifying section spraying device, wherein the four-stage stripping rectifying section spraying device is communicated with the bottom of the four-stage preheater, the four-stage stripping rectifying section filling section is positioned above the four-stage stripping rectifying section spraying device, and the upper part of the four-stage stripping rectifying section filling section is communicated with the lower part of the three-stage stripping rectifying section spraying device;
the five-stage deamination device comprises a five-stage preheater, a five-stage stripping rectifying section filling section and a five-stage stripping rectifying section spraying device, wherein the five-stage stripping rectifying section spraying device is communicated with the bottom of the five-stage preheater, the five-stage stripping rectifying section filling section is positioned above the five-stage stripping rectifying section spraying device, and the upper part of the five-stage stripping rectifying section filling section is communicated with the lower part of the four-stage stripping rectifying section spraying device;
the six-stage deamination device comprises a six-stage preheater, a six-stage stripping rectifying section filling section and a six-stage stripping rectifying section spraying device, wherein the six-stage stripping rectifying section spraying device is communicated with the bottom of the six-stage preheater, the six-stage stripping rectifying section filling section is positioned above the six-stage stripping rectifying section spraying device, and the upper part of the six-stage stripping rectifying section filling section is communicated with the lower part of the five-stage stripping rectifying section spraying device;
the seven-stage deamination device comprises a seven-stage stripping rectifying section filling section, a seven-stage stripping rectifying section and a deamination wastewater output pipeline, wherein a low-pressure steam inlet is formed in the bottom of the seven-stage stripping rectifying section filling section, the deamination wastewater output pipeline is connected with the bottom of the seven-stage stripping rectifying section and the bottom of the second-stage preheater, and a conveying pump is arranged on the deamination wastewater output pipeline.
Preferably, the packing sections of each stripping rectifying section are efficient packing towers.
Preferably, each stage of preheater is a shell-and-tube heat exchanger or a plate heat exchanger.
The utility model also provides a deamination method of the high-concentration ammonia nitrogen wastewater, which comprises the following steps:
s1, enabling high-concentration ammonia nitrogen wastewater to enter a primary deamination device, and raising the temperature from 20 ℃ to 30 ℃ after heat exchange with steam of a primary preheater; the low-temperature high-concentration ammonia nitrogen wastewater and the ammonia-containing steam through the primary preheater indirectly exchange heat, and a cold source is provided for the tower top condenser when the ammonia-containing wastewater is preheated, so that the use amount of cooling circulating water is reduced;
s2, discharging high-concentration ammonia nitrogen wastewater from a first-stage preheater, then entering a second-stage deamination device, after heat exchange in the second-stage preheater, raising the temperature from 30 ℃ to 90 ℃ to start deamination, wherein the heat source of the second-stage preheater is deamination wastewater discharged from a conveying pump through a deamination wastewater output pipeline, after heat exchange, spraying by a second-stage stripping rectifying section spraying device 4, and entering a third-stage preheater;
s3, continuously performing indirect heat exchange on the ammonia-containing wastewater in the third-stage preheater and the ammonia-containing steam evaporated from the fourth-stage deamination device to heat up to 95 ℃, then spraying the ammonia-containing wastewater in a third-stage stripping rectification section spraying device from the bottom of the third-stage preheater, and entering the fourth-stage preheater;
s4, continuously performing indirect heat exchange with the ammonia-containing wastewater evaporated by the five-stage deamination device in the four-stage preheater to raise the temperature to 100 ℃, then spraying the ammonia-containing wastewater into a four-stage stripping rectifying section spraying device from the bottom of the four-stage preheater, and entering the five-stage preheater;
s5, continuously performing indirect heat exchange with ammonia-containing steam evaporated by a six-stage deamination device in a five-stage preheater to heat up to 105 ℃, then spraying the ammonia-containing wastewater into a five-stage stripping rectifying section spraying device from the bottom of the five-stage preheater, performing heat exchange on the ammonia-containing wastewater into the six-stage preheater, and then spraying the ammonia-containing wastewater into a seven-stage stripping rectifying section filling section;
s6, the ammonia-containing wastewater directly contacts and exchanges heat with low-pressure steam input by a low-pressure steam inlet in a packing section of the seven-stage stripping rectifying section, and after deamination is finished, the deamination wastewater is discharged from a deamination wastewater output pipeline at the bottom of the tower, and the discharged deamination wastewater is connected to the bottom of the secondary preheater to be used as a heat source for indirect heat exchange of the preheater and finally discharged to the outside of the deamination system due to higher temperature.
The utility model has the beneficial effects that the whole deamination system has lower pressure from top to bottom, the ammonia-containing wastewater enters from the top and is discharged from the bottom, low-pressure steam enters from the bottom and is discharged from the top, ammonia nitrogen in the high-concentration ammonia nitrogen wastewater is recovered in the form of high-concentration ammonia steam, and meanwhile, the heat energy of the system is recovered and utilized to the maximum extent, so that the aim of energy-saving deamination of the high-concentration ammonia nitrogen wastewater is achieved.
Drawings
FIG. 1 is a schematic diagram of a deamination system of high concentration ammonia nitrogen wastewater of the present utility model.
Detailed Description
The utility model is further illustrated and described below with reference to examples.
Referring to FIG. 1, a deamination system for high concentration ammonia nitrogen wastewater comprises
A deamination system for high-concentration ammonia nitrogen wastewater comprises
A condenser arranged at the top of the deamination system;
the primary deamination device comprises a primary preheater 1 for heating the ammonia nitrogen wastewater;
the secondary deamination device comprises a secondary preheater 2, a secondary stripping rectifying section filling section 3 and a secondary stripping rectifying section spraying device 4, wherein the primary preheater 1 is communicated with the bottom of the secondary preheater 2, the secondary stripping rectifying section spraying device 4 is communicated with the bottom of the secondary heat exchanger 2, and the secondary stripping rectifying section filling section 3 is positioned above the secondary stripping rectifying section spraying device 4;
the three-stage deamination device comprises a three-stage preheater 5, a three-stage stripping rectifying section filling section 6 and a three-stage stripping rectifying section spraying device 7, wherein the three-stage stripping rectifying section spraying device 7 is communicated with the bottom of the three-stage preheater 5, the three-stage stripping rectifying section filling section 6 is positioned above the three-stage stripping rectifying section spraying device 7, and the upper part of the three-stage stripping rectifying section filling section 6 is communicated with the lower part of the two-stage stripping rectifying section spraying device 4;
the four-stage deamination device comprises a four-stage preheater 8, a four-stage stripping rectifying section filling section 9 and a four-stage stripping rectifying section spraying device 10, wherein the four-stage stripping rectifying section spraying device 10 is communicated with the bottom of the four-stage preheater 8, the four-stage stripping rectifying section filling section 9 is positioned above the four-stage stripping rectifying section spraying device 10, and the upper part of the four-stage stripping rectifying section filling section 9 is communicated with the lower part of the three-stage stripping rectifying section spraying device 7;
the five-stage deamination device comprises a five-stage preheater 11, a five-stage stripping rectifying section filling section 12 and a five-stage stripping rectifying section spraying device 13, wherein the five-stage stripping rectifying section spraying device 13 is communicated with the bottom of the five-stage preheater 11, the five-stage stripping rectifying section filling section 12 is positioned above the five-stage stripping rectifying section spraying device 13, and the upper part of the five-stage stripping rectifying section filling section 12 is communicated with the lower part of the four-stage stripping rectifying section spraying device 10;
the six-stage deamination device comprises a six-stage preheater 14, a six-stage stripping rectifying section filling section 15 and a six-stage stripping rectifying section spraying device 16, wherein the six-stage stripping rectifying section spraying device 16 is communicated with the bottom of the six-stage preheater 14, the six-stage stripping rectifying section filling section 15 is positioned above the six-stage stripping rectifying section spraying device 16, and the upper part of the six-stage stripping rectifying section filling section 15 is communicated with the lower part of the five-stage stripping rectifying section spraying device 13;
seven-stage deamination device, seven-stage deamination device including seven-stage strip rectifying section packing section 17, seven-stage strip rectifying section 18 and deamination waste water output pipeline 19, seven-stage strip rectifying section packing section 17 bottom be equipped with low pressure steam inlet 20, deamination waste water output pipeline 19 connect seven-stage strip rectifying section 18 bottom and second grade preheater 2 bottom, deamination waste water output pipeline 19 on be equipped with the delivery pump.
Preferably, the packing sections of each stripping rectifying section are efficient packing towers.
Preferably, each stage of preheater is a shell-and-tube heat exchanger or a plate heat exchanger.
A recycling energy-saving deamination method for high-concentration ammonia nitrogen wastewater comprises the following steps:
s1, enabling high-concentration ammonia nitrogen wastewater to enter a primary deamination device, and raising the temperature from 20 ℃ to 30 ℃ after heat exchange with steam of a primary preheater 1; the low-temperature high-concentration ammonia nitrogen wastewater and the ammonia-containing steam passing through the primary preheater 1 indirectly exchange heat, and a cold source is provided for the tower top condenser while the ammonia-containing wastewater is preheated, so that the use amount of cooling circulating water is reduced;
s2, discharging high-concentration ammonia nitrogen wastewater from a primary preheater 1, then entering a secondary deamination device, after heat exchange in the secondary preheater 2, raising the temperature from 30 ℃ to 90 ℃ to start deamination, wherein the heat source of the secondary preheater 2 is deamination wastewater discharged from a conveying pump through a deamination wastewater output pipeline 19, after heat exchange, spraying by a secondary stripping rectifying section spraying device 4, and entering a tertiary preheater 5;
s3, continuously performing indirect heat exchange on the ammonia-containing wastewater in the third-stage preheater 5 and the ammonia-containing steam evaporated from the fourth-stage deamination device to heat up to 95 ℃, then spraying the ammonia-containing wastewater in the third-stage stripping rectification section spraying device 7 from the bottom of the third-stage preheater 5, and entering the fourth-stage preheater 8;
s4, continuously performing indirect heat exchange with the ammonia-containing wastewater evaporated by the five-stage deamination device in the four-stage preheater 8 to raise the temperature to 100 ℃, and then entering a four-stage stripping rectifying section spraying device 10 from the bottom of the four-stage preheater 8 to spray and entering a five-stage preheater 11;
s5, ammonia-containing wastewater is continuously subjected to indirect heat exchange with ammonia-containing steam evaporated by a six-stage deamination device in a five-stage preheater 11 to be heated to 105 ℃, then enters a five-stage stripping rectifying section spray device 13 from the bottom of the five-stage preheater 11 to be sprayed, enters a six-stage preheater 14 to exchange heat, then enters a six-stage stripping rectifying section spray device 16 to be sprayed and enters a seven-stage stripping rectifying section filler section 17;
s6, the ammonia-containing wastewater directly contacts and exchanges heat with low-pressure steam input by a low-pressure steam inlet 20 in a packing section 17 of the seven-stage stripping rectifying section, and after deamination is finished, the deamination wastewater is discharged from a deamination wastewater output pipeline 19 at the bottom of the tower, and the discharged deamination wastewater has higher temperature, so that the ammonia-containing wastewater is connected to the bottom of the secondary preheater 2 to be used as a heat source for indirect heat exchange of the preheater, and finally is discharged to the outside of the deamination system.
Claims (3)
1. A deamination system of high-concentration ammonia nitrogen wastewater is characterized in that the deamination system comprises
A condenser arranged at the top of the deamination system;
the primary deamination device comprises a primary preheater for heating the ammonia nitrogen wastewater;
the secondary deamination device comprises a secondary preheater, a secondary stripping rectifying section filling section and a secondary stripping rectifying section spraying device, wherein the primary preheater is communicated with the bottom of the secondary preheater, the secondary stripping rectifying section spraying device is communicated with the bottom of the secondary preheater, and the secondary stripping rectifying section filling section is positioned above the secondary stripping rectifying section spraying device;
the three-stage deamination device comprises a three-stage preheater, a three-stage stripping rectifying section filling section and a three-stage stripping rectifying section spraying device, wherein the three-stage stripping rectifying section spraying device is communicated with the bottom of the three-stage preheater, the three-stage stripping rectifying section filling section is positioned above the three-stage stripping rectifying section spraying device, and the upper part of the three-stage stripping rectifying section filling section is communicated with the lower part of the two-stage stripping rectifying section spraying device;
the four-stage deamination device comprises a four-stage preheater, a four-stage stripping rectifying section filling section and a four-stage stripping rectifying section spraying device, wherein the four-stage stripping rectifying section spraying device is communicated with the bottom of the four-stage preheater, the four-stage stripping rectifying section filling section is positioned above the four-stage stripping rectifying section spraying device, and the upper part of the four-stage stripping rectifying section filling section is communicated with the lower part of the three-stage stripping rectifying section spraying device;
the five-stage deamination device comprises a five-stage preheater, a five-stage stripping rectifying section filling section and a five-stage stripping rectifying section spraying device, wherein the five-stage stripping rectifying section spraying device is communicated with the bottom of the five-stage preheater, the five-stage stripping rectifying section filling section is positioned above the five-stage stripping rectifying section spraying device, and the upper part of the five-stage stripping rectifying section filling section is communicated with the lower part of the four-stage stripping rectifying section spraying device;
the six-stage deamination device comprises a six-stage preheater, a six-stage stripping rectifying section filling section and a six-stage stripping rectifying section spraying device, wherein the six-stage stripping rectifying section spraying device is communicated with the bottom of the six-stage preheater, the six-stage stripping rectifying section filling section is positioned above the six-stage stripping rectifying section spraying device, and the upper part of the six-stage stripping rectifying section filling section is communicated with the lower part of the five-stage stripping rectifying section spraying device;
the seven-stage deamination device comprises a seven-stage stripping rectifying section filling section, a seven-stage stripping rectifying section and a deamination wastewater output pipeline, wherein a low-pressure steam inlet is formed in the bottom of the seven-stage stripping rectifying section filling section, the deamination wastewater output pipeline is connected with the bottom of the seven-stage stripping rectifying section and the bottom of the second-stage preheater, and a conveying pump is arranged on the deamination wastewater output pipeline.
2. The deamination system of high concentration ammonia nitrogen wastewater of claim 1, wherein the packing section of each stripping rectifying section is a high efficiency packing tower.
3. The deamination system of high concentration ammonia nitrogen wastewater of claim 1, wherein each stage of preheater is a shell-and-tube heat exchanger or a plate heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222748892.6U CN219117177U (en) | 2022-10-19 | 2022-10-19 | Deamination system of high concentration ammonia nitrogen waste water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222748892.6U CN219117177U (en) | 2022-10-19 | 2022-10-19 | Deamination system of high concentration ammonia nitrogen waste water |
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| CN219117177U true CN219117177U (en) | 2023-06-02 |
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| CN202222748892.6U Active CN219117177U (en) | 2022-10-19 | 2022-10-19 | Deamination system of high concentration ammonia nitrogen waste water |
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