Accurate coal gasification black water hardness treatment device
By using ash detection and CO2 control valve linkage in the coal gasification black water treatment device, the precise use of CO2 hardening agent is achieved, solving the problem of inaccurate hardening removal in the existing technology, and realizing the efficient utilization of hardening agent and the optimization of water treatment system.
Patent Information
- Application Number
- CN202423175477.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Existing coal gasification black water treatment equipment does not remove hardness accurately, making it difficult to control the amount of hardening agent used, which is easy to waste, increases operating costs, and may affect the efficiency of subsequent water treatment systems and the environment.
The amount of CO2 hardening agent used is precisely controlled by ash content detection results. Waste CO2 generated from coal gasification is used as the hardening agent. Combined with the linkage between the pulverized coal detection port and the CO2 control valve, the precise use of the hardening agent is achieved.
It achieves full utilization of CO2, avoids waste of hardening agents, ensures the accuracy of hardening removal effect, reduces operating costs, and improves the efficiency of water treatment system.
Smart Images
Figure CN223646398U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of precise hardness treatment technology for coal gasification black water, specifically to a device for precise hardness treatment of coal gasification black water. Background Technology
[0002] During coal gasification, the gasification reaction produces a large amount of high-hardness black water, which contains coal gasification ash and other suspended solids. If effective hardness treatment is not performed, the high hardness of the black water will affect the operating efficiency of subsequent water treatment systems, causing difficulties in the use of recycled water and even polluting the environment.
[0003] Existing coal gasification black water treatment devices often suffer from inaccurate hardening removal, making it difficult to precisely control the amount of hardening remover used, which can easily lead to waste and increase operating costs.
[0004] Based on this, a precise hardness treatment device for coal gasification black water is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content
[0005] To address the aforementioned issues, a precise hardness treatment device for coal gasification black water is provided. This device precisely controls the amount of CO2 hardening agent used based on ash content detection results, preventing waste of the hardening agent and achieving a precise hardening removal effect.
[0006] To address the existing technical problems, this utility model provides a precise hardness treatment device for coal gasification black water, including a coal gasification furnace. The coal gasification furnace is equipped with a pulverized coal inlet and a coal gasification ash outlet at its lower end. The other end of the coal gasification ash outlet is connected to a slag remover. The upper side wall of the slag remover is equipped with a slag-water outlet, the other end of which is connected to a flocculation tank. The lower end of the flocculation tank is equipped with an ash-water outlet, the other end of which is connected to a hardness removal tank. The coal gasification furnace is equipped with a pulverized coal detection port.
[0007] Preferably, the coal gasifier has a syngas outlet on its side wall, and the other end of the syngas outlet is connected to a low-temperature methanol washing device. The low-temperature methanol washing device has a first CO2 outlet on its side wall, and the other end of the first CO2 outlet is connected to a CO2 buffer tank.
[0008] Preferably, the CO2 buffer tank is provided with a second CO2 outlet at its lower end, and the hardness removal tank is provided with a third CO2 outlet. The end of the second CO2 outlet away from the CO2 buffer tank and the end of the third CO2 outlet away from the hardness removal tank are connected. A CO2 control valve is provided between the second CO2 outlet and the third CO2 outlet. The hardness removal tank is provided with a qualified soft water outlet at its lower end.
[0009] Preferably, the hardness detection port is provided on the hardness removal pool.
[0010] The advantages of this utility model compared to the prior art are:
[0011] 1. This utility model adds a CO2 hardening device, which avoids the use of other chemical hardening agents and can make full use of the waste CO2 generated by coal gasification.
[0012] 2. This utility model, through the linkage between the pulverized coal detection port and the CO2 control valve, can regulate the amount of CO2 used in real time, avoid CO2 waste, and ensure the accuracy of the hardening effect. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of a device for precisely treating the hardness of black water from coal gasification.
[0014] The diagram is labeled as follows: 1. Pulverized coal inlet; 2. Pulverized coal testing port; 3. Coal gasification furnace; 4. Syngas outlet; 5. Coal gasification ash outlet; 6. Ash removal machine; 7. Slag water outlet; 8. Low-temperature methanol washing unit; 9. Flocculation tank; 10. First CO2 outlet; 11. CO2 buffer tank; 12. Ash water outlet; 13. Hardness testing port; 14. Hardness removal tank; 15. Qualified soft water outlet; 16. Second CO2 outlet; 17. CO2 control valve; 18. Third CO2 outlet. Detailed Implementation
[0015] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.
[0016] Reference Figure 1 A precise hardness treatment device for black water from coal gasification includes a coal gasification furnace 3, a pulverized coal inlet 1 on the coal gasification furnace 3, a coal gasification ash and slag outlet 5 at the lower end of the coal gasification furnace 3, a slag remover 6 at the other end of the ash and slag outlet 5, a slag and water outlet 7 on the upper side wall of the slag remover 6, a flocculation tank 9 at the other end of the flocculation tank 9, an ash and water outlet 12 at the lower end of the ash and water outlet 12 at the other end of the ash and water outlet 12, and a hardness removal tank 14. A pulverized coal detection port 2 is provided on the coal gasification furnace 3.
[0017] In this process, pulverized coal with a qualified ratio enters the coal gasifier 3 through the pulverized coal inlet 1 to undergo a gasification reaction. The pulverized coal gasifier 3 detects the ash content in the pulverized coal through the pulverized coal detection port 2. The coal gasification ash generated during the gasification process flows into the slag remover 6 through the coal gasification ash outlet 5 to remove large solid ash. The black water after ash removal enters the flocculation tank 9 through the slag water outlet 7 for flocculation treatment of small particulate solid suspensions. The flocculated ash water enters the hardening tank 14 through the ash water outlet 12 for hardening treatment.
[0018] Reference Figure 1The coal gasification furnace 3 has a syngas outlet 4 on its side wall. The other end of the syngas outlet 4 is connected to a low-temperature methanol washing device 8. The low-temperature methanol washing device 8 has a first CO2 outlet 10 on its side wall. The other end of the first CO2 outlet 10 is connected to a CO2 buffer tank 11.
[0019] The syngas generated by the gasifier 3 enters the low-temperature methanol washing unit 8 through the syngas outlet 4 for syngas purification. The CO2 separated during the purification process is discharged into the CO2 buffer tank 11 through the first CO2 outlet 10.
[0020] Reference Figure 1 The CO2 buffer tank 11 is provided with a second CO2 outlet 16 at its lower end, and the hardness removal tank 14 is provided with a third CO2 outlet 18. The end of the second CO2 outlet 16 away from the CO2 buffer tank 11 and the end of the third CO2 outlet 18 away from the hardness removal tank 14 are connected. A CO2 control valve 17 is provided between the second CO2 outlet 16 and the third CO2 outlet 18. The hardness removal tank 14 is provided with a qualified soft water outlet 15 at its lower end.
[0021] The CO2 in the CO2 buffer tank 11 flows through the second CO2 outlet 16 and is regulated by the CO2 control valve 17. Then, it enters the hardening tank 14 through the third CO2 outlet 18 to react with the ash water, achieving the purpose of precise hardening removal. The opening of the CO2 control valve 17 is adjusted in real time based on the ash content detected by the pulverized coal detection port 2, thereby preventing the overuse and waste of CO2 and ensuring the precise use of the hardening agent.
[0022] Reference Figure 1 The hardness detection port 13 is provided on the hardness removal pool 14.
[0023] After hardening, the water quality is tested through hardness detection port 13, and the water is discharged when the hardness reaches the predetermined standard.
[0024] Working principle:
[0025] S1. The prepared pulverized coal enters the gasifier 3 through the pulverized coal inlet 1 to undergo gasification. The ash content needs to be tested at the pulverized coal detection port 2. Gasification produces syngas and gasification ash. The gasification ash contains a large amount of high-hardness water and flows from the gasification ash outlet 5 to the slag remover 6 to remove large solid ash. The black water after ash removal enters the flocculation tank 9 through the slag water outlet 7 to flocculate small particulate solid suspensions. The ash water obtained after flocculation enters the hardening removal tank 14 through the ash water outlet 12. At the same time, the syngas produced by the gasifier 3 enters the low-temperature methanol washing device 8 through the syngas outlet 4 to purify the syngas and extract CO2. The separated CO2 is discharged into the CO2 buffer tank 11 through the first CO2 outlet 10, and then flows into the hardening removal tank 14 through the third CO2 outlet 18 after the CO2 delivery rate is regulated by the CO2 control valve 17 through the second CO2 outlet 16. The hardening removal process is carried out in the ash water. The CO2 control valve adjusts its opening based on the ash content data detected by the pulverized coal detection port, thereby avoiding excessive waste of CO2. The water quality after hardening is tested and qualified by the hardness detection port 13 before being discharged to the next stage system.
[0026] S2. Pulverized coal enters the coal gasifier 3 through pulverized coal inlet 1, where it undergoes a gasification reaction to generate syngas and coal gasification ash. Before entering the gasifier, the ash content of the pulverized coal is detected through pulverized coal detection port 2. The detection port is linked to the CO2 control valve 17. When the detected ash content of the pulverized coal is high, the control valve automatically adjusts the CO2 flow rate to prevent waste of the hardening agent.
[0027] S3. The coal gasification ash produced by gasification enters the ash remover 6 through the coal gasification ash outlet 5 to remove large solid ash. Then, the black water containing small ash particles enters the flocculation tank 9 through the slag water outlet 7. In the flocculation tank, the small solid particles are agglomerated and settled by the action of flocculants. The flocculated ash water enters the hardening removal tank 14 through the ash water outlet 12 to react with the regulated CO2 for hardening removal treatment.
[0028] S4. The syngas generated by the gasifier is discharged from the syngas outlet 4 and enters the low-temperature methanol washing unit 8. During the low-temperature methanol washing process, CO2 gas is separated and stored in the CO2 buffer tank 11 through the first CO2 outlet 10. Subsequently, the CO2 enters the CO2 control valve 17 through the second CO2 outlet 16 for regulation to ensure that the amount of CO2 used matches the data of the fly ash content detection port 2.
[0029] S5. After hardening, the water is tested through hardness detection port 13. When the water hardness meets the standard, the qualified water is discharged or enters the next stage of water treatment system.
[0030] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. 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 all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.
Claims
1. A device for precisely treating the hardness of black water from coal gasification, characterized in that, The system includes a coal gasifier (3), which has a pulverized coal inlet (1) and a coal gasification ash outlet (5) at the lower end. The other end of the coal gasification ash outlet (5) is connected to a slag remover (6). The upper side wall of the slag remover (6) has a slag water outlet (7). The other end of the slag water outlet (7) is connected to a flocculation tank (9). The lower end of the flocculation tank (9) has an ash water outlet (12). The other end of the ash water outlet (12) is connected to a hardening tank (14). The coal gasifier (3) has a pulverized coal detection port (2).
2. The precise hardness treatment device for coal gasification black water according to claim 1, characterized in that, The coal gasifier (3) has a syngas outlet (4) on its side wall. The other end of the syngas outlet (4) is connected to a low-temperature methanol washing device (8). The low-temperature methanol washing device (8) has a first CO2 outlet (10) on its side wall. The other end of the first CO2 outlet (10) is connected to a CO2 buffer tank (11).
3. The precise hardness treatment device for coal gasification black water according to claim 2, characterized in that, The CO2 buffer tank (11) is provided with a second CO2 outlet (16) at its lower end, and the hardness removal tank (14) is provided with a third CO2 outlet (18). The second CO2 outlet (16) is connected to the end away from the CO2 buffer tank (11), and the third CO2 outlet (18) is connected to the end away from the hardness removal tank (14). A CO2 control valve (17) is provided between the second CO2 outlet (16) and the third CO2 outlet (18). The hardness removal tank (14) is provided with a qualified soft water outlet (15) at its lower end.
4. The precise hardness treatment device for coal gasification black water according to claim 1, characterized in that, The hardness detection port (13) is provided on the hardness removal tank (14).