A device for purifying and washing ammonia-containing exhaust gas
Patent Information
- Application Number
- CN202522065601.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-25
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-09-25
AI Technical Summary
[0003]为解决现有技术中存在的废气温度低于58℃时易形成碳铵结晶，导致设备堵塞、超压及废气被迫放空，造成环境污染的问题，本实用新型提供了一种含氨废气净化洗涤处理装置
本实用新型的装置用稀酚水喷淋洗涤含氨废气，含氨废气经冷却器冷却后进入凝液槽，凝液槽顶部出来的酸性气体由洗涤器下部进入，与从上部进入喷淋的稀酚水逆流接触，对酸性气中夹带的氨气今汐洗涤，洗涤后由洗涤器顶部排出进行尾气进一步处理，洗涤器内底部的酸性液体则从底部的回流端排出回流至冷凝液槽；稀酚水的弱酸性可中和废气中的CO2，减少碳酸铵生成，避免碳铵结晶堵塞设备及管线，保障系统连续运行。酚类物质对废气中的H2S、SO2等酸性气体具有吸附作用，实现氨气与酸性组分的同步净化，提升废气处理综合效率。
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Figure CN224793231U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waste gas purification technology, and in particular to a device for purifying and washing ammonia-containing waste gas. Background Technology
[0002] Existing technologies for treating ammonia-containing waste gas mainly include chemical scrubbing, which uses dilute sulfuric acid or strong alkali solutions for spray absorption, accompanied by packed tower structures. However, the presence of highly corrosive media leads to short equipment lifespan, and the absorbent cannot be recycled, resulting in high wastewater treatment costs. In the first-stage water washing section of multi-stage spray scrubbing, NH3 in the waste gas reacts with CO2 to form ammonium bicarbonate (NH4HCO3). When the temperature is below 58℃, crystallization blocks the packing layer (especially in winter conditions), requiring frequent shutdowns for cleaning. The second-stage dilute alkali regeneration relies on steam stripping, consuming up to 1.5 tons of steam per ton of wastewater, and lacks waste heat recovery design, resulting in a regeneration efficiency of less than 40% and high energy consumption. There is an urgent need for a low-energy, low-cost, and highly efficient solution for treating high-concentration ammonia-containing waste gas. Utility Model Content
[0003] To address the problem in existing technologies where ammonium carbonate crystals easily form when the exhaust gas temperature is below 58°C, leading to equipment blockage, overpressure, and forced venting of exhaust gas, causing environmental pollution, this utility model provides an ammonia-containing exhaust gas purification and washing treatment device.
[0004] The technical solution adopted in this utility model is: A device for purifying and scrubbing ammonia-containing waste gas includes a cooler, a condensate tank, and a scrubber. The outlet end of the cooler is connected to the inlet end of the condensate tank. The condensate tank is provided with a condensate outlet end and a condensate gas outlet end. The gas outlet end of the condensate tank is connected to the inlet end of the scrubber. The top of the scrubber is provided with a scrubbing gas outlet end, the bottom of the scrubber is provided with a return end, and the scrubber is also provided with a dilute phenol water inlet end. The condensate outlet of the condensate tank is used to connect to the deacidification and deammoniation tower and to transport the condensate to the deacidification and deammoniation tower through a valve; The washing gas outlet of the scrubber is used to connect to the external exhaust gas treatment end and to transport the washed gas in the scrubber to the exhaust gas treatment end through a valve. The return end of the scrubber is connected to the inlet end of the cooler and is used to transport the liquid in the scrubber back to the condensate tank through a valve; The dilute phenol water inlet is used to connect to an external dilute phenol water delivery pipeline and to input dilute phenol water into the washer.
[0005] Furthermore, the inlet end of the cooler is connected to a first flow regulating valve, and a second flow regulating valve, a fourth flow regulating valve, and a fifth flow regulating valve are provided between the outlet end of the cooler and the inlet end of the condensate tank. The inlet end of the cooler is connected to the dilute phenol water conveying pipeline through a third flow regulating valve. The second flow regulating valve, the fourth flow regulating valve, and the fifth flow regulating valve are connected in parallel to each other.
[0006] Furthermore, a sixth flow regulating valve is connected to the inlet end of the condensate tank, a seventh flow regulating valve is connected between the inlet end of the condensate tank and the return end of the washer, an eighth flow regulating valve is connected between the condensate outlet end of the condensate tank and the inlet end of the washer, and a ninth flow regulating valve is connected between the condensate outlet end of the condensate tank and the washing outlet end of the washer. The ninth flow regulating valve is used to control the condensate generated at the washing outlet at the top of the washer during the exhaust process to flow back into the condensate tank.
[0007] Furthermore, the condensate outlet of the condensate tank is sequentially connected to an eleventh flow regulating valve, a condensate pump, and a tenth flow regulating valve; the tenth flow regulating valve is used to control the liquid output by the condensate pump to be transported to the deacidification and deammoniation tower.
[0008] Furthermore, the inlet end of the dilute phenol water in the washer is connected to the outlet end of the thirteenth flow regulating valve, the inlet end of the thirteenth flow regulating valve is connected to the outlet end of the pipeline pump, and the inlet end of the pipeline pump is connected to the twelfth flow regulating valve; the twelfth flow regulating valve is used to control the dilute phenol water to be pressurized by the pipeline pump and delivered to the inside of the washer through the thirteenth flow regulating valve.
[0009] Furthermore, the washer is also connected to a purge steam pipe, which is connected to the inside of the washer via a fourteenth flow regulating valve; the purge steam pipe is used to control the input of purge steam into the washer for purging and cleaning.
[0010] Furthermore, a fifteenth flow regulating valve is connected between the return end at the bottom of the washer and the condensate outlet end of the condensate tank, and the washing outlet end at the top of the washer is connected to the sixteenth and seventeenth flow regulating valves respectively through the eighteenth flow regulating valve. The sixteenth flow regulating valve is used to connect to the external thermoelectric co-firing end for combustion treatment of the exhaust gas, and the seventeenth flow regulating valve is used to connect to the external venting end for venting the exhaust gas.
[0011] The beneficial effects of this utility model are: This invention utilizes a dilute phenolic water spray to scrub ammonia-containing waste gas. The ammonia-containing waste gas, after being cooled by a cooler, enters a condensate tank. Acidic gas exiting from the top of the condensate tank enters from the bottom of the scrubber and comes into countercurrent contact with the dilute phenolic water sprayed from the top, effectively scrubbing the ammonia entrained in the acidic gas. The scrubber then discharges the waste gas from the top for further treatment. The acidic liquid at the bottom of the scrubber is discharged back to the condensate tank from the bottom return end. The weak acidity of the dilute phenolic water neutralizes CO2 in the waste gas, reducing ammonium carbonate formation and preventing ammonium carbonate crystallization from clogging equipment and pipelines, ensuring continuous system operation. Phenolic substances adsorb acidic gases such as H2S and SO2 in the waste gas, achieving simultaneous purification of ammonia and acidic components, thus improving the overall efficiency of waste gas treatment. Attached Figure Description
[0012] Figure 1 This is a process structure diagram of the device of this utility model.
[0013] Figure label: 10-Cooler, 11-First flow regulating valve, 12-Second flow regulating valve, 13-Third flow regulating valve, 14-Fourth flow regulating valve, 15-Fifth flow regulating valve; 20-Condensation tank, 21-Sixth flow control valve, 22-Seventh flow control valve, 23-Eighth flow control valve, 24-Ninth flow control valve; 30 - Condensate pump; 31 - Tenth flow control valve; 32 - Eleventh flow control valve; 40 - Pipeline pump; 41 - Twelfth flow control valve; 50 - Washer, 51 - Thirteenth flow control valve, 52 - Fourteenth flow control valve, 53 - Fifteenth flow control valve, 54 - Sixteenth flow control valve, 55 - Seventeenth flow control valve, 56 - Eighteenth flow control valve. Detailed Implementation
[0014] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Example 1
[0015] A device for purifying and scrubbing ammonia-containing waste gas includes a cooler 10, a condensate tank 20, and a scrubber 50. The outlet end of the cooler 10 is connected to the inlet end of the condensate tank 20. The condensate tank 20 is provided with a condensate outlet end and a condensate gas outlet end. The gas outlet end of the condensate tank 20 is connected to the inlet end of the scrubber 50. The top of the scrubber 50 is provided with a scrubbing gas outlet end, the bottom of the scrubber 50 is provided with a return end, and the scrubber 50 is also provided with a dilute phenol water inlet end. The condensate outlet of the condensate tank 20 is used to connect to the deacidification and deammoniation tower and to transport the condensate to the deacidification and deammoniation tower through a valve; the washing gas outlet of the scrubber 50 is used to connect to the tail gas treatment end and to transport the washed gas in the scrubber 50 to the tail gas treatment end through a valve; the return end of the scrubber 50 is connected to the inlet end of the cooler 10 and is used to transport the liquid in the scrubber 50 back to the condensate tank 20 through a valve; the dilute phenol water inlet end is used to connect to the dilute phenol water delivery pipeline and to input dilute phenol water into the scrubber 50.
[0016] The ammonia-containing waste gas first enters the cooler 10, where it is cooled to remove some water vapor. The cooled gas and the accompanying condensate then enter the condensate tank 20. Gas-liquid separation is achieved inside the condensate tank 20. The separated condensate is transported to an external deacidification and deammoniation tower for further treatment through the condensate outlet and corresponding valve. The separated ammonia-containing gas enters the scrubber 50 through the gas outlet of the condensate tank 20. An external dilute phenol water supply pipeline introduces dilute phenol water into the scrubber 50 through its inlet. The ammonia-containing gas enters from the bottom of the scrubber 50, coming into full contact with the dilute phenol water sprayed from top to bottom. The weakly acidic nature of the dilute phenol water neutralizes CO2 in the gas, reducing ammonium carbonate formation, and simultaneously adsorbs acidic gases such as H2S and SO2, achieving simultaneous purification of ammonia and acidic components. The washed gas is transported to the external exhaust gas treatment end through the washing outlet and valve at the top of the scrubber 50, while the liquid at the bottom of the scrubber 50 flows back to the condensate tank 20 through the return end and valve, forming a cycle. This invention effectively avoids the problem of ammonium bicarbonate crystallization clogging equipment and pipelines, ensures continuous system operation, improves the overall efficiency of waste gas treatment, and achieves preliminary recovery and utilization of condensate, providing support for subsequent resource recycling. Furthermore, the ammonia removal rate can reach 95%-98%, and the ammonia concentration in the waste gas is reduced to ≤20mg / m³, which is better than the national emission standards. Example 2
[0017] This embodiment is based on the aforementioned embodiment. In this embodiment, the inlet end of the cooler 10 is connected to a first flow regulating valve 11, and a second flow regulating valve 12, a fourth flow regulating valve 14, and a fifth flow regulating valve 15 are provided between the outlet end of the cooler 10 and the inlet end of the condensate tank 20. The inlet end of the cooler 10 is connected to the dilute phenol water conveying pipeline through a third flow regulating valve 13. The second flow regulating valve 12, the fourth flow regulating valve 14, and the fifth flow regulating valve 15 are connected in parallel with each other.
[0018] Ammonia-containing waste gas enters the cooler 10 through the first flow regulating valve 11 at the inlet end. Operators can control the amount of waste gas entering the cooler 10 by adjusting the first flow regulating valve 11 according to the actual flow rate and temperature of the waste gas, ensuring that the cooler 10 can stably and efficiently cool the waste gas and avoid affecting the cooling effect due to fluctuations in the waste gas volume. The cooled gas and condensate flow out from the outlet end of the cooler 10, and then flow to the inlet end of the condensate tank 20 through the parallel-connected second flow regulating valve 12, fourth flow regulating valve 14, and fifth flow regulating valve 15. These three parallel regulating valves can flexibly adjust the delivery rate according to the mixing state of the condensate and gas and the real-time receiving capacity of the condensate tank 20, preventing a sudden rise in the liquid level of the condensate tank 20 due to excessive flow or affecting subsequent treatment due to insufficient flow. Meanwhile, the dilute phenol water delivery pipeline is connected to the inlet of the cooler 10 through the third flow regulating valve 13. When needed, the third flow regulating valve 13 can be opened to add an appropriate amount of dilute phenol water to the inlet of the cooler 10 to help neutralize some of the acidic components in the exhaust gas, or to regulate the humidity and temperature of the exhaust gas when it enters the cooler 10, so as to create more favorable conditions for subsequent cooling and separation.
[0019] This embodiment achieves more precise control over the conveying process of waste gas, condensate, and dilute phenol water through the synergistic action of multiple flow regulating valves. This effectively avoids the impact of flow fluctuations on the stability of system operation, improves the cooling efficiency of cooler 10 and the receiving stability of condensate tank 20, provides a more stable pretreatment environment for subsequent washing and purification processes, and further ensures the continuity and reliability of the entire system operation. Example 3
[0020] This embodiment is based on the aforementioned embodiment. In this embodiment, a sixth flow regulating valve 21 is connected to the inlet end of the condensate tank 20, a seventh flow regulating valve 22 is connected between the inlet end of the condensate tank 20 and the return end of the scrubber 50, an eighth flow regulating valve 23 is connected between the condensate outlet end of the condensate tank 20 and the inlet end of the scrubber 50, and a ninth flow regulating valve 24 is connected between the condensate outlet end of the condensate tank 20 and the washing outlet end of the scrubber 50. The ninth flow regulating valve 24 is used to control the condensate generated at the washing outlet end at the top of the scrubber 50 during the exhaust process to flow back into the condensate tank 20.
[0021] The cooled gas and condensate enter the condensate tank 20 through the sixth flow regulating valve 21. The sixth flow regulating valve 21 adjusts the amount of material entering the condensate tank 20 according to the real-time liquid level, ensuring the liquid level in the condensate tank 20 remains stable within a reasonable range, providing a good foundation for gas-liquid separation and subsequent material conveying. Liquid from the bottom return end of the scrubber 50 flows to the inlet end of the condensate tank 20 through the seventh flow regulating valve 22. Operators can control the amount of return liquid by adjusting the seventh flow regulating valve 22 to maintain a balanced total liquid volume in the condensate tank 20, preventing excessive return liquid from causing the condensate tank 20 level to be too high, or insufficient return liquid from causing the condensate tank 20 level to be too low, affecting normal operation. After gas-liquid separation is completed in the condensate tank 20, the separated ammonia-containing gas enters the inlet end of the scrubber 50 through the eighth flow regulating valve 23. The opening of the eighth flow regulating valve 23 is adjusted according to the actual processing capacity of the scrubber 50 to control the gas delivery rate, ensuring that the ammonia-containing gas fully contacts the dilute phenol water in the scrubber 50, improving the ammonia removal effect. Meanwhile, a small amount of condensate may be generated at the top of the washer 50 during the exhaust process. This condensate is returned to the condensate tank 20 through the ninth flow regulating valve 24. The ninth flow regulating valve 24 can control the amount of condensate returned, so as to avoid the accumulation of condensate at the washer exhaust end and affect the smoothness of exhaust. At the same time, the condensate is recovered to the condensate tank 20, reducing liquid waste and improving resource utilization.
[0022] This embodiment achieves orderly material transport and effective condensate recovery between the condensate tank 20 and the scrubber 50 through the control of various regulating valves, ensuring stable liquid level in the condensate tank 20 and smooth venting of the scrubber 50, reducing the risk of equipment blockage, and further improving the stability of system operation and resource recovery efficiency. Example 4
[0023] This embodiment is based on the previous embodiment. In this embodiment, the condensate outlet of the condensate tank 20 is connected in sequence to the eleventh flow regulating valve 32, the condensate pump 30 and the tenth flow regulating valve 31; the tenth flow regulating valve 31 is used to control the liquid output by the condensate pump 30 to be transported to the deacidification and deammoniation tower.
[0024] The condensate stored in the condensate tank 20 first enters the eleventh flow regulating valve 32 through the condensate outlet. Operators adjust the opening of the eleventh flow regulating valve 32 according to the actual condensate volume and the processing requirements of the deacidification and deammoniation tower, initially controlling the amount of liquid entering the condensate pump 30. This prevents the condensate pump 30 from overloading due to excessive liquid volume or running dry due to insufficient liquid volume, ensuring stable operation of the condensate pump 30. The condensate then enters the condensate pump 30, which provides sufficient power for condensate delivery, pressurizing the condensate and delivering it to the tenth flow regulating valve 31. The tenth flow regulating valve 31 further controls the amount of liquid delivered to the deacidification and deammoniation tower, adjusting the valve opening according to the real-time operating status of the tower to ensure that the tower can stably receive the condensate and perform efficient deacidification and deammoniation treatment. Throughout the transportation process, the pressurizing effect of the condensate pump 30 ensures that the condensate can overcome pipeline resistance and be stably transported to the deacidification and deammoniation tower. The coordinated regulation of the eleventh flow regulating valve 32 and the tenth flow regulating valve 31 effectively avoids the impact of flow fluctuations on the treatment effect of the deacidification and deammoniation tower. At the same time, it ensures that the liquid level in the condensate tank 20 will not be too low due to the condensate being transported too quickly, thus maintaining the overall liquid level balance of the system.
[0025] This embodiment achieves stable and controllable delivery of condensate to the deacidification and deammoniation tower, ensuring the efficient operation of the tower, promoting condensate recycling, reducing waste discharge, lowering waste treatment costs, and providing strong support for the continuous operation of the entire system, further improving resource recycling efficiency. Example 5
[0026] This embodiment is based on the aforementioned embodiment. In this embodiment, the inlet end of the dilute phenol water of the washer 50 is connected to the outlet end of the thirteenth flow regulating valve 51, the inlet end of the thirteenth flow regulating valve 51 is connected to the outlet end of the pipeline pump 40, and the inlet end of the pipeline pump 40 is connected to the twelfth flow regulating valve 41. The twelfth flow regulating valve 41 is used to control the dilute phenol water to be pressurized by the pipeline pump 40 and delivered to the inside of the washer 50 through the thirteenth flow regulating valve 51.
[0027] The diluted phenolic water first flows from the source to the twelfth flow regulating valve 41. Based on the actual washing needs within the washer 50, such as the concentration and flow rate of ammonia gas and the desired washing effect, the operator adjusts the opening of the twelfth flow regulating valve 41 to control the amount of diluted phenolic water entering the pipeline pump 40. This ensures that the total amount of diluted phenolic water entering the pipeline pump 40 matches the needs of the washer 50, avoiding waste due to excessive diluted phenolic water or insufficient washing due to insufficient diluted phenolic water, which would affect the ammonia removal effect. Subsequently, the diluted phenolic water enters the pipeline pump 40, which pressurizes it to provide sufficient pressure. This pressure not only ensures smooth delivery into the washer 50 but also creates a uniform and fine spray effect within the washer 50, ensuring full contact with the ammonia gas entering from the bottom of the washer 50. The pressurized dilute phenol water flows through the outlet of pipeline pump 40 to the thirteenth flow regulating valve 51. The thirteenth flow regulating valve 51 further regulates the flow rate and pressure of the dilute phenol water entering the scrubber 50, so that the dilute phenol water enters the scrubber 50 from the dilute phenol water inlet end of the scrubber 50 in the best state, and is evenly sprayed on the multi-segment high specific surface area packing layer inside the scrubber 50, forming a counter-current contact with the ammonia-containing gas, giving full play to the neutralization and adsorption effect of the dilute phenol water, and efficiently removing ammonia and acidic gases.
[0028] This embodiment ensures that the dilute phenol water enters the scrubber 50 at a suitable flow rate and pressure and forms an effective spray by using the pressurization of the pipeline pump 40 and the control of two flow regulating valves. This significantly improves the gas-liquid contact efficiency, enabling the ammonia removal rate to reach 95%-98% and reducing the ammonia concentration in the exhaust gas to ≤20mg / m³, which is better than the national emission standard. At the same time, it avoids the waste of dilute phenol water, reduces operating costs, and ensures the efficient and stable operation of the washing and purification process. Example 6
[0029] This embodiment is based on the aforementioned embodiment. In this embodiment, the washer 50 is also connected to a purge steam pipe, which is connected to the inside of the washer 50 through the fourteenth flow regulating valve 52. The purge steam pipe is used to control the input of purge steam into the washer 50 for purge cleaning.
[0030] During prolonged system operation, residual impurities, small amounts of unavoidable crystals, or contaminants can easily accumulate on the packing layer and tower walls inside the scrubber 50. If these substances are not removed promptly, they will gradually affect the gas-liquid contact effect and may even cause blockages in pipes or packing, reducing scrubbing efficiency and leading to system shutdown. At this point, the purge steam pipe connected to the scrubber 50 is opened. The purge steam enters the scrubber 50 through the fourteenth flow regulating valve 52. Operators can adjust the opening of the fourteenth flow regulating valve 52 according to the amount of impurities adhering to the scrubber 50, controlling the flow rate and pressure of the purge steam to ensure appropriate purging force. This effectively removes and carries away impurities and residues adhering to the packing surface and tower walls without damaging the packing layer and structure inside the scrubber 50. The purge steam flows omnidirectionally within the scrubber 50, thoroughly purging the packing layer. The removed impurities are discharged or recycled through subsequent processing. In addition, preventative purging can be performed through the purging steam pipe before system shutdown for maintenance or when a downward trend in washing efficiency is detected, to remove potential impurities in advance and ensure that the washer 50 is always kept clean and unobstructed.
[0031] This embodiment can promptly remove impurities and residues inside the scrubber 50, effectively prevent pipe and packing blockage, ensure that the gas-liquid contact efficiency does not decrease, maintain the stability of the ammonia removal rate, avoid frequent system shutdowns for cleaning due to blockage, reduce downtime, improve the continuous operation efficiency of the system, and at the same time reduce maintenance difficulty and cost, ensuring that the scrubber 50 maintains a high-efficiency operating state for a long time. Example 7
[0032] This embodiment is based on the aforementioned embodiment. In this embodiment, a fifteenth flow regulating valve 53 is connected between the return end at the bottom of the scrubber 50 and the condensate outlet end of the condensate tank 20. The scrubbing outlet end at the top of the scrubber 50 is connected to a sixteenth flow regulating valve 54 and a seventeenth flow regulating valve 55 through an eighteenth flow regulating valve 56. The sixteenth flow regulating valve 54 is used to connect to an external thermoelectric co-firing end to treat the exhaust gas for combustion, and the seventeenth flow regulating valve 55 is used to connect to an external venting end to vent the exhaust gas.
[0033] Liquid at the bottom return end of the scrubber 50 flows to the condensate outlet of the condensate tank 20 through the fifteenth flow regulating valve 53. Operators can adjust the opening of the fifteenth flow regulating valve 53 according to the gas-liquid balance in the condensate tank 20 and the return flow requirements to control the flow rate of the return liquid. This allows the return liquid to initially mix with the ammonia-containing gas at the outlet of the condensate tank 20, or to replenish the liquid in the condensate tank 20, maintaining a stable liquid level while preventing the return liquid from interfering with the normal gas-liquid separation process within the condensate tank 20. The gas purified by scrubbing at the top of the scrubber 50 first passes through the eighteenth flow regulating valve 56, which acts as the main control valve, adjusting the total discharge volume of the treated gas according to the overall exhaust requirements of the system. Subsequently, based on the gas treatment effect and actual application requirements, a portion of the gas is transported to the external thermoelectric co-firing end through the sixteenth flow regulating valve 54 for combustion treatment; the other portion of gas, which fully meets emission standards, is transported to the external vent end through the seventeenth flow regulating valve 55 for safe discharge outdoors. During operation, the opening of the sixteenth and seventeenth flow regulating valves 55 can be flexibly adjusted according to the real-time load of the thermoelectric system and the waste gas treatment volume to rationally allocate the gas flow direction, ensure the safe discharge of compliant gas, and eliminate the risk of environmental pollution.
[0034] This embodiment achieves stable reflux of the washed liquid and flexible distribution of the treated gas. Liquid reflux further improves resource recovery and utilization, and reduces waste liquid discharge. Part of the gas is sent to co-firing in a thermal power plant to achieve energy recovery and increase revenue, while part is vented to the atmosphere to ensure environmental safety. Meanwhile, this solution requires less equipment, fewer pipelines, and lower investment. The washing water can also be the wastewater treated by the system. There is no increase in steam consumption or water consumption during operation. After the washing waste liquid is stripped by the ammonia stripping tower, the ammonia recovery rate is ≥85%, which can produce 15%-20% concentration ammonia water for direct use in the desulfurization system, realizing closed-loop reuse of ammonia resources. The dilute phenol water after ammonia removal is returned to the scrubber for 50% circulating spraying, reducing fresh water replenishment by 60%-70%, and the system water consumption is close to zero. Simultaneously, maintenance and operation are simple, significantly reducing production and operating costs.
[0035] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.
Claims
1. A device for purifying and scrubbing ammonia-containing waste gas, characterized in that, The device includes a cooler, a condensate tank, and a scrubber. The outlet end of the cooler is connected to the inlet end of the condensate tank. The condensate tank is provided with a condensate outlet and a condensate vent end. The vent end of the condensate tank is connected to the inlet end of the scrubber. The top of the scrubber is provided with a scrubbing vent end, the bottom of the scrubber is provided with a return end, and the scrubber is also provided with a dilute phenol water inlet end. The condensate outlet of the condensate tank is used to connect to the deacidification and deammoniation tower and to transport condensate to the deacidification and deammoniation tower through a valve; The washing gas outlet of the scrubber is used to connect to the exhaust gas treatment end and to transport the washed gas in the scrubber to the exhaust gas treatment end through a valve. The return end of the scrubber is connected to the inlet end of the cooler and is used to transport the liquid in the scrubber back to the condensate tank through a valve; The dilute phenol water inlet is used to connect to an external dilute phenol water delivery pipeline and to input dilute phenol water into the washer.
2. The ammonia-containing waste gas purification and scrubbing treatment device according to claim 1, characterized in that, The inlet end of the cooler is connected to a first flow regulating valve, and the outlet end of the cooler is connected to the inlet end of the condensate tank by a second flow regulating valve, a fourth flow regulating valve and a fifth flow regulating valve. The inlet end of the cooler is connected to the dilute phenol water conveying pipeline by a third flow regulating valve. The second flow regulating valve, the fourth flow regulating valve, and the fifth flow regulating valve are connected in parallel to each other.
3. The ammonia-containing waste gas purification and scrubbing treatment device according to claim 1, characterized in that, The inlet end of the condensate tank is connected to a sixth flow regulating valve, the inlet end of the condensate tank is connected to the return end of the washer to a seventh flow regulating valve, the condensate outlet end of the condensate tank is connected to the inlet end of the washer to an eighth flow regulating valve, and the condensate outlet end of the condensate tank is connected to the washing outlet end of the washer to a ninth flow regulating valve. The ninth flow regulating valve is used to control the condensate generated at the washing outlet at the top of the washer during the exhaust process to flow back into the condensate tank.
4. The ammonia-containing waste gas purification and scrubbing treatment device according to claim 1, characterized in that, The condensate outlet of the condensate tank is sequentially connected to an eleventh flow regulating valve, a condensate pump, and a tenth flow regulating valve; the tenth flow regulating valve is used to control the liquid output by the condensate pump to be transported to the deacidification and deammoniation tower.
5. The ammonia-containing waste gas purification and scrubbing treatment device according to claim 1, characterized in that, The inlet of the washer is connected to the outlet of the thirteenth flow regulating valve, the inlet of the thirteenth flow regulating valve is connected to the outlet of the pipeline pump, and the inlet of the pipeline pump is connected to the twelfth flow regulating valve. The twelfth flow regulating valve is used to control the dilute phenol water to be pressurized by the pipeline pump and delivered to the inside of the washer through the thirteenth flow regulating valve.
6. The ammonia-containing waste gas purification and scrubbing treatment device according to claim 1, characterized in that, The washer is also connected to a purge steam pipe, which is connected to the inside of the washer via a fourteenth flow regulating valve; the purge steam pipe is used to control the input of purge steam into the washer for purging and cleaning.
7. The ammonia-containing waste gas purification and scrubbing treatment device according to claim 1, characterized in that, The reflux end at the bottom of the washer is connected to the condensate outlet end of the condensate tank by a fifteenth flow regulating valve, and the washing outlet end at the top of the washer is connected to the sixteenth and seventeenth flow regulating valves through the eighteenth flow regulating valve. The sixteenth flow regulating valve is used to connect to the external thermoelectric co-firing end for combustion treatment of the exhaust gas, and the seventeenth flow regulating valve is used to connect to the external venting end for venting the exhaust gas.