Ammonia gas circulation purification system for semi-coke wastewater treatment
By designing an ammonia circulation purification system, utilizing multi-stage purification towers and liquid ammonia cooling structures, the problems of incomplete ammonia purification and high investment in semi-coke wastewater treatment were solved, achieving the recycling and purity improvement of ammonia and reducing costs.
Patent Information
- Application Number
- CN202520065269.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-01-13
AI Technical Summary
In existing semi-coke wastewater treatment methods, ammonia purification requires the use of external fresh ammonia water, resulting in high investment and low economic benefits, and the ammonia purification is not thorough enough.
Design an ammonia gas circulation purification system that utilizes the ammonia gas generated by itself to contact the circulating washing ammonia water in a countercurrent manner through a multi-stage purification tower to achieve the recycling of ammonia gas. The system adopts a three-stage purification zone and a liquid ammonia cooling structure to absorb impurities in the ammonia gas.
This enables the recycling of ammonia, reduces the procurement and transportation costs of fresh ammonia water, improves the purity and economic efficiency of ammonia, and avoids resource waste.
Smart Images
Figure CN223683312U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to wastewater treatment technical field, and specifically relates to an ammonia gas circulating purification system for semi coke wastewater treatment. BACKGROUND
[0002] The semi coke wastewater is complex in water quality composition, and the pollutants mainly include ammonia, carbon dioxide, mononuclear phenol, polynuclear phenol, fatty acid and oil etc. These substances are all polar substances, and ammonia, carbon dioxide and hydrogen sulfide etc. are volatile weak electrolytes in aqueous solution. The acidic gases such as H2S and CO2 in the wastewater can cause interference to the treatment process and cause equipment corrosion and scaling; and ammonia and phenols have inhibitory effect on microorganisms, thereby affecting the subsequent biochemical treatment, so that the ammonia removal treatment is carried out in the semi coke wastewater treatment process, and the ammonia gas generated by the ammonia removal treatment often contains a large amount of impurities such as phenols, H2S and organic sulfur, which need to be further purified. The most commonly used purification method at present is the ammonia water washing process method. The ammonia water used in the existing ammonia water washing process is fresh ammonia water from outside, which can greatly improve the purity of ammonia gas, but increases the investment and has low economic benefits. If the ammonia gas generated by itself can be recycled and utilized, the investment can be greatly reduced, and the existing ammonia water washing process equipment needs to be improved at present. SUMMARY
[0003] The utility model provides a kind of ammonia gas circulating purification system for semi coke wastewater treatment with reasonable design, ammonia gas washing efficiency is high, economic benefit.
[0004] The technical scheme adopted to solve the above technical problems is as follows: an ammonia gas circulating purification system for semi coke wastewater treatment, an ammonia gas raw material inlet pipe is connected to the ammonia gas purification device, an ammonia gas output pipe h of the ammonia gas purification device is connected to an ammonia gas inlet pipe of an ammonia gas absorber, a dilute ammonia water output pipe of the ammonia gas absorber is connected to a liquid inlet of an ammonia water tank, a liquid outlet of the ammonia water tank is connected to a dilute ammonia water pump group and a dilute ammonia water delivery main pipe, the dilute ammonia water delivery main pipe is divided into two paths, one path is connected to an ammonia water inlet pipe of the ammonia gas purification device, and the other path is connected to a next treatment unit.
[0005] As a preferred technical scheme, the ammonia gas purification device is as follows: an ammonia gas output pipe h is arranged at the top of the ammonia gas purification tower, an ammonia water inlet pipe b is arranged at the upper side, and an ammonia gas raw material inlet pipe a is arranged at the lower side, the inner cavity of the ammonia gas purification tower is sequentially divided into a first-stage ammonia gas purification zone, a second-stage ammonia gas purification zone and a third-stage ammonia gas purification zone from bottom to top, a lower-section ammonia liquid cooling structure is connected to the first-stage ammonia gas purification zone, an upper-section ammonia liquid cooling structure is connected to the third-stage ammonia gas purification zone, the ammonia water inlet pipe is in communication with the third-stage ammonia gas purification zone, and the ammonia gas raw material inlet pipe a is in communication with the first-stage ammonia gas purification zone.
[0006] As a preferred technical scheme, the upper-stage ammonia liquid cooling structure is that the bottom liquid ammonia outlet of the secondary ammonia gas purification zone is connected with the liquid inlet of the upper-stage ammonia liquid cooler through the upper-stage liquid ammonia circulating pump group, and the liquid outlet of the upper-stage ammonia liquid cooler is connected with the liquid inlet d1 at the upper part of the tertiary ammonia gas purification zone and the liquid inlet d2 at the top of the secondary ammonia gas purification zone.
[0007] As a preferred technical scheme, the lower-stage ammonia liquid cooling structure is that the liquid outlet f at the bottom of the ammonia gas purification tower is connected with the liquid discharge pipeline and the liquid inlet of the lower-stage ammonia liquid cooler through the lower-stage liquid ammonia circulating pump group, and the liquid outlet of the lower-stage ammonia liquid cooler is connected with the liquid inlet e at the upper part of the primary ammonia gas purification zone.
[0008] As a preferred technical scheme, the sealing plate is arranged between the secondary ammonia gas purification zone and the primary ammonia gas purification zone in the ammonia gas purification tower, the overflow pipe and the gas lifting cap are arranged on the sealing plate, and the secondary ammonia gas purification zone and the primary ammonia gas purification zone are connected through the overflow pipe and the gas lifting cap.
[0009] The beneficial effects of the utility model are as follows:
[0010] The utility model realizes the recycling of ammonia gas, and does not need to use a large amount of fresh ammonia water for washing. Compared with the traditional process using fresh ammonia water, the purchasing and transportation costs of fresh ammonia water are reduced, and the overall investment is reduced. The generated ammonia gas is purified and recycled, the ammonia resources in the waste water are fully utilized, the waste of resources is avoided, the comprehensive utilization rate of resources is improved, and more economic benefits are created for enterprises.
[0011] The ammonia gas purification tower in the embodiment is provided with a tertiary ammonia gas purification zone, and ammonia gas is in turn contacted with circulating washing ammonia water in the primary, secondary and tertiary ammonia gas purification zones in a countercurrent manner. The multi-stage purification mode can fully absorb impurities such as phenol, hydrogen sulfide and carbon dioxide in ammonia gas, so that ammonia gas is more thoroughly purified, and the purity of ammonia gas is improved. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 It is a structural schematic diagram of the utility model.
[0013] Figure 2 It is a structural schematic diagram of the ammonia gas purification tower.
[0014] Among them: ammonia gas purification tower 1, gas lifting cap 1-1, sealing plate 1-2, overflow pipe 1-3, lower-stage ammonia liquid cooler 2, ammonia gas absorber 3, dilute ammonia water pump group 4, ammonia water tank 5, lower-stage liquid ammonia circulating pump group 6, upper-stage liquid ammonia circulating pump group 7, upper-stage ammonia liquid cooler 8. DETAILED DESCRIPTION
[0015] The utility model is further explained in detail below in combination with the drawings and embodiments, but the utility model is not limited to the following embodiments.
[0016] In Figure 1 In the embodiment, the ammonia gas recycling purification system for semi-coke wastewater treatment is connected with an ammonia gas raw material inlet pipe a on the ammonia gas purification device, the ammonia gas output pipe h of the ammonia gas purification device is connected with the ammonia gas inlet pipe of the ammonia gas absorber 3, the dilute ammonia water output pipe of the ammonia gas absorber 3 is connected with the liquid inlet of the ammonia water tank 5, the liquid outlet of the ammonia water tank 5 is connected with the dilute ammonia water delivery main pipe through the dilute ammonia water pump group 4, the dilute ammonia water delivery main pipe is divided into two ways, one way is connected with the ammonia water inlet pipe of the ammonia gas purification device, and the other way is connected with the next processing unit.
[0017] The ammonia gas purification device of the embodiment comprises an ammonia gas purification tower 1, a lower section ammonia liquid cooling structure and an upper section ammonia liquid cooling structure. The ammonia gas purification tower 1 is provided with an ammonia gas output pipe h at the top, an ammonia water inlet pipe b at the upper side and an ammonia gas raw material inlet pipe a at the lower side. The inner cavity of the ammonia gas purification tower 1 is sequentially provided with a first-stage ammonia gas purification zone, a second-stage ammonia gas purification zone and a third-stage ammonia gas purification zone from bottom to top. A partition plate 1-2 is sealingly arranged between the second-stage ammonia gas purification zone and the first-stage ammonia gas purification zone. The partition plate 1-2 is provided with an overflow pipe 1-3 and a gas riser cap 1-1. The second-stage ammonia gas purification zone and the first-stage ammonia gas purification zone are connected through the overflow pipe 1-3 and the gas riser cap 1-1. The ammonia gas purified through the first-stage ammonia gas purification zone enters the second-stage ammonia gas purification zone through the gas riser cap. The liquid ammonia of the second-stage ammonia gas purification zone enters the first-stage ammonia gas purification zone through the overflow pipe 1-3.
[0018] The first-stage ammonia gas purification zone is connected with the lower section ammonia liquid cooling structure and the ammonia gas raw material inlet pipe. The second-stage ammonia gas purification zone is connected with the upper section ammonia liquid cooling structure. The third-stage ammonia gas purification zone is connected with the ammonia water inlet pipe b. The ammonia water inlet pipe b is used for washing the ammonia gas in the third-stage ammonia gas purification zone and simultaneously providing liquid ammonia for the first-stage ammonia gas purification zone and the second-stage ammonia gas purification zone.
[0019] The upper section ammonia liquid cooling structure is as follows: the lower end liquid ammonia output port c of the second-stage ammonia gas purification zone is connected with the liquid inlet of the upper section ammonia liquid cooler 8 through the upper section liquid ammonia circulating pump group 7. The liquid outlet of the upper section ammonia liquid cooler 8 is connected with the upper section liquid inlet d1 of the third-stage ammonia gas purification zone and the top liquid inlet d2 of the second-stage ammonia gas purification zone. The structure is used for circulatingly washing the ammonia gas in the second-stage ammonia gas purification zone.
[0020] The lower section ammonia liquid cooling structure is as follows: the liquid outlet f at the bottom of the ammonia gas purification tower 1 is connected with the liquid discharge pipeline and the liquid inlet of the lower section ammonia liquid cooler 2 through the lower section liquid ammonia circulating pump group 6. The liquid outlet of the lower section ammonia liquid cooler 2 is connected with the upper section liquid inlet e of the first-stage ammonia gas purification zone. The structure is used for circulatingly washing the ammonia gas in the first-stage ammonia gas purification zone.
[0021] The ammonia raw material enters the ammonia purification tower 1, and is in turn contacted with the circulating washing ammonia water in countercurrent through the first-stage ammonia purification zone, the second-stage ammonia purification zone and the third-stage ammonia purification zone. The phenol, hydrogen sulfide, carbon dioxide and a small amount of water and a small amount of ammonia in the ammonia gas are absorbed into the dilute ammonia water. The purified crude ammonia gas is taken out from the top of the purification tower, converted into dilute ammonia water through the ammonia gas absorber 3, buffered in the ammonia water tank 5, and transported back to the ammonia gas purification device through the dilute ammonia water pump set 4 to wash the ammonia raw material, so that the ammonia gas is recycled.
Claims
1. An ammonia circulation and purification system for treating semi-coke wastewater, characterized in that: The ammonia gas purification device is connected with an ammonia gas raw material inlet pipe, an ammonia gas output pipe h of the ammonia gas purification device is connected with an ammonia gas inlet pipe of the ammonia gas absorber, an ammonia water output pipe of the ammonia gas absorber is connected with a liquid inlet of the ammonia water tank, a liquid outlet of the ammonia water tank is connected with a dilute ammonia water pump group and a dilute ammonia water delivery main pipe, the dilute ammonia water delivery main pipe is divided into two paths, one path is connected with an ammonia water inlet pipe of the ammonia gas purification device, and the other path is connected with a next processing unit.
2. The ammonia gas circulation purification system for the semi-coke wastewater treatment according to claim 1, characterized in that, The ammonia gas purification device is provided with an ammonia gas output pipe h at the top of the ammonia gas purification tower, an ammonia water inlet pipe b at the upper side, and an ammonia gas raw material inlet pipe a at the lower side, and the inner cavity of the ammonia gas purification tower is sequentially provided with a first-stage ammonia gas purification zone, a second-stage ammonia gas purification zone, and a third-stage ammonia gas purification zone from bottom to top, the first-stage ammonia gas purification zone is connected with a lower-section ammonia liquid cooling structure, and the third-stage ammonia gas purification zone is connected with an upper-section ammonia liquid cooling structure, the ammonia water inlet pipe is in communication with the third-stage ammonia gas purification zone, and the ammonia gas raw material inlet pipe a is in communication with the first-stage ammonia gas purification zone.
3. The ammonia gas circulation purification system for the semi-coke wastewater treatment according to claim 2, characterized in that, The upper-section ammonia liquid cooling structure is provided with a lower-section liquid ammonia circulating pump group, a lower-section ammonia liquid cooler, and a liquid inlet d1 of the upper-section ammonia liquid cooler and a liquid inlet d2 of the second-stage ammonia gas purification zone.
4. The ammonia gas circulation purification system for the semi-coke wastewater treatment according to claim 2, characterized in that, The lower-section ammonia liquid cooling structure is provided with a lower-section liquid ammonia circulating pump group, a lower-section ammonia liquid cooler, and a liquid outlet f of the lower-section ammonia liquid cooler and a liquid inlet e of the first-stage ammonia gas purification zone.
5. The ammonia gas circulation purification system for the semi-coke wastewater treatment according to claim 2, characterized in that, The second-stage ammonia gas purification zone and the first-stage ammonia gas purification zone are sealingly provided with a partition plate between the ammonia gas purification tower, the partition plate is provided with an overflow pipe and a gas-lifting cap, and the second-stage ammonia gas purification zone and the first-stage ammonia gas purification zone are in communication through the overflow pipe and the gas-lifting cap.