Washing cooling water internal circulation system of dry acetylene generator
By using a dry acetylene generator washing and cooling water internal circulation system, the environmental pollution problem in the washing water recycling process is solved, efficient washing water recycling is achieved, and production costs and equipment maintenance burden are reduced.
Patent Information
- Application Number
- CN202422653495.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-10-31
AI Technical Summary
In the dry acetylene generation process of polyvinyl chloride production using the calcium carbide method, the washing water is easily polluted and harms the health of workers when it is recycled through a cooling water pool. In addition, the cooling process is complex and the equipment maintenance costs are high.
A dry acetylene generator is used to wash the cooling water internal circulation system. The washing water is circulated internally in the washing cooling tower. The slurry water is transported to the spray pipe by the slurry pump and sprayed into the acetylene generator. This avoids the washing water being transported to the cooling water pool for cooling and sedimentation. Combined with the stirring paddle, it promotes the full reaction between powdered calcium carbide and water.
It enables the internal recycling of washing water, avoids environmental pollution and sedimentation waste filtration, and reduces production costs and power consumption.
Smart Images
Figure CN223547955U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of organic chemical technology, and in particular to an internal circulation system for washing and cooling water in a dry acetylene generator. Background Technology
[0002] In the dry acetylene generation process of polyvinyl chloride (PVC) production using the calcium carbide method, acetylene gas is mainly produced by the reaction of powdered calcium carbide added to the generator with spray water. Since the acetylene gas produced in the generator contains a large amount of dust, it needs to be cleaned in a scrubbing tower before being sent to subsequent processes. In the original slurry water treatment process, the washing water circulation in the scrubbing cooling tower adopts an external circulation mode, that is, the washing water in the tower is partially used for internal washing and circulation by a circulation pump, and the other part is sent to a cooling water pool for cooling and sedimentation. After sedimentation and cooling, it is sent back to the acetylene generator and scrubbing cooling tower for circulation. The precipitated slurry is filtered by a filter press, and the filter water is recycled.
[0003] In this production process, the washing water contains impurities such as acetylene, sulfur, and phosphorus, which can easily cause environmental pollution during the cooling process, resulting in a poor on-site working environment and harming the health of workers. The cooling process is complex, requiring multiple settling cooling stages, using a large number of equipment, and incurring high equipment maintenance costs. Utility Model Content
[0004] To address the aforementioned technical problems, this utility model provides a washing and cooling water internal circulation system for a dry acetylene generator. This system solves the problem that in the existing dry acetylene generation process using the calcium carbide method for polyvinyl chloride, the washing water is easily used for recycling through a cooling water pool, which can cause environmental pollution, resulting in a poor on-site working environment and harming the health of workers.
[0005] To achieve the above objectives, the technical solution of this utility model is as follows:
[0006] A dry acetylene generator washing and cooling water internal circulation system includes a washing and cooling tower and a washing pump. The acetylene generator has a slag discharge pipe at its bottom with a discharge valve. A slurry pump is connected between the acetylene generator and the washing and cooling tower. A slurry pipe is installed at the inlet of the slurry pump, passing through the bottom of the inner cavity of the washing and cooling tower. A spray pipe is installed at the outlet of the slurry pump, passing through the top of the inner cavity of the acetylene generator. Spray nozzles are opened on the portion of the spray pipe passing through the inner cavity of the acetylene generator. The acetylene generator and the washing and cooling tower are connected via an acetylene pipeline. The washing and cooling tower is connected to the inlet of the washing pump via a washing inlet pipe. The inlet of the washing inlet pipe in the washing and cooling tower is higher than the inlet of the slurry pipe. A washing outlet pipe is connected to the outlet of the washing pump, and a water supply pipe is connected to the washing outlet pipe. The other end of the washing outlet pipe passes through the outer wall of the washing and cooling tower and is connected to a washing tower spray head within its inner cavity. The top of the washing and cooling tower is connected to an acetylene cooler via an acetylene pipeline.
[0007] Furthermore, the acetylene generator is equipped with a motor at the top, and the motor's main shaft passes through the top of the acetylene generator and is connected to an agitator.
[0008] Furthermore, the washing tower has multiple spray heads, which are connected through a washing outlet pipe.
[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model completes the internal circulation of washing cooling water in the washing cooling tower. The washing water in the washing cooling tower is replenished to a suitable level through the water replenishment pipe. Then, the washing pump starts its own circulation operation, and at the same time, the acetylene generator starts working and the slurry pump is turned on. The slurry pump transports the slurry water at the bottom of the washing cooling tower to the spray pipe through the slurry pipe. Then, it sprays the slurry water into the acetylene generator through the spray nozzles on the spray pipe. Through the internal circulation method, the environmental pollution problem caused by transporting the washing water to the cooling water pool for cooling and sedimentation is avoided. It also avoids the problem of increased power consumption in production costs caused by the need for the sedimented waste residue to be filtered and the need to start the filter press at regular intervals. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the structure of this utility model;
[0011] In the picture:
[0012] 1. Acetylene generator; 2. Washing and cooling tower; 3. Slag discharge pipe; 4. Motor; 5. Slurry pump; 6. Spray pipe; 7. Washing pump; 8. Washing outlet pipe; 9. Washing tower spray head; 10. Acetylene pipe; 12. Acetylene cooler; 14. Water supply pipe; 15. Agitator; 16. Feed valve; 17. Slurry pipe; 18. Washing inlet pipe. Detailed Implementation
[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.
[0014] like Figure 1As shown, a dry acetylene generator washing and cooling water internal circulation system includes a washing and cooling tower 2 and a washing pump 7. The acetylene generator 1 has a slag discharge pipe 3 at its bottom, with a discharge valve 16 on the slag discharge pipe 3. A slurry pump 5 is installed between the acetylene generator 1 and the washing and cooling tower 2. A slurry pipe 17 is installed at the inlet end of the slurry pump 5, passing through the bottom of the inner cavity of the washing and cooling tower 2. A spray pipe 6 is installed at the outlet end of the slurry pump 5, passing through the top of the inner cavity of the acetylene generator 1. The portion of the spray pipe 6 that passes through the inner cavity of the acetylene generator 1 is also shown. The washing cooling tower 2 is equipped with a spray nozzle. The acetylene generator 1 is connected to the washing cooling tower 2 through the acetylene pipe 10. The washing cooling tower 2 is connected to the inlet end of the washing pump 7 through the washing inlet pipe 18. The opening of the washing inlet pipe 18 in the washing cooling tower 2 is higher than the opening of the slurry pipe 17. The outlet end of the washing pump 7 is connected to the washing outlet pipe 8. The washing outlet pipe 8 is connected to the water supply pipe 14. The other end of the washing outlet pipe 8 passes through the outer wall of the washing cooling tower 2 and is connected to the washing tower spray head 9 in its inner cavity. The top of the washing cooling tower 2 is connected to the acetylene cooler 12 through the acetylene pipe 10. This invention achieves internal circulation of washing and cooling water within the washing and cooling tower 2. The washing water in the washing and cooling tower 2 is replenished to a suitable level via the water supply pipe 14. Then, the washing pump 7 begins its own circulation operation. Simultaneously, the acetylene generator 1 starts operating, and the slurry pump 5 is activated. The slurry pump 5 transports the slurry water from the bottom of the washing and cooling tower 2 to the spray pipe 6 via the slurry pipe 17. The slurry water is then sprayed into the acetylene generator 1 through the spray nozzles on the spray pipe 6. This internal circulation method avoids the environmental pollution caused by transporting the washing water to the cooling water pool for cooling and sedimentation. It also avoids the need for the sedimented waste residue to undergo pressure filtration, requiring the filter press to be started periodically, which increases electricity consumption in production costs.
[0015] The acetylene generator 1 is equipped with a motor 4 at its top. The main shaft of the motor 4 passes through the top of the acetylene generator 1 and is connected to a stirring paddle 15. When the motor 4 is started, the main shaft of the motor 4 drives the stirring paddle 15 to rotate, which promotes the full reaction between the powdered calcium carbide added to the acetylene generator 1 and the sprayed water.
[0016] The washing tower spray head 9 is provided with multiple spray heads 9, which are connected through the washing outlet pipe 8. The design of multiple spray heads 9 can fully clean the acetylene gas entering the washing cooling tower 2.
[0017] When using:
[0018] 1. Nitrogen purging is performed on acetylene generator 1 and washing cooling tower 2, requiring oxygen content ≤0.2%.
[0019] 2. Open the water supply pipe 14 to supply water to the washing cooling tower 2. Observe the liquid level in the washing cooling tower 2. Stop supplying water when the liquid level in the washing cooling tower 2 rises to 80%.
[0020] 3. Start the washing pump 7, and the washing cooling tower 2 will circulate itself.
[0021] 4. Turn on the acetylene generator 1 and start the motor 4. The main shaft of the motor 4 drives the agitator 15 to rotate. Start the slurry pump 5 to spray the slurry water in the washing cooling tower 2 into the acetylene generator 1. The powdered calcium carbide added to the acetylene generator 1 reacts fully with the sprayed water. The remaining waste residue after the reaction is transported through the slag discharge pipe 3.
[0022] 5. The acetylene gas produced by the reaction is transferred to the washing and cooling tower 2 through the acetylene pipeline 10. Under the action of the spray head of the washing and cooling tower 2, the acetylene gas is cleaned. After cleaning, the acetylene gas is transported to the acetylene cooler 12 through the acetylene pipeline 10.
[0023] 6. Observe the changes in the liquid level of the washing cooling tower 2, and replenish water to the washing cooling tower 2 in a timely manner to ensure a stable operating liquid level.
[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A washing and cooling water internal circulation system for a dry acetylene generator, characterized in that: The system includes a washing cooling tower (2) and a washing pump (7). The acetylene generator (1) has a slag discharge pipe (3) at its bottom, and a discharge valve (16) on the slag discharge pipe (3). A slurry pump (5) is located between the acetylene generator (1) and the washing cooling tower (2). A slurry pipe (17) is installed at the inlet end of the slurry pump (5), passing through the bottom of the inner cavity of the washing cooling tower (2). A spray pipe (6) is installed at the outlet end of the slurry pump (5), passing through the top of the inner cavity of the acetylene generator (1). Spray nozzles are opened on the portion of the spray pipe (6) that passes through the inner cavity of the acetylene generator (1). (1) The washing cooling tower (2) is connected to the washing pump (7) through the acetylene pipeline (10). The washing cooling tower (2) is connected to the inlet end of the washing pump (7) through the washing inlet pipe (18). The opening of the washing inlet pipe (18) in the washing cooling tower (2) is higher than the opening of the slurry pipe (17). The outlet end of the washing pump (7) is connected to the washing outlet pipe (8). The washing outlet pipe (8) is connected to the water supply pipe (14). The other end of the washing outlet pipe (8) passes through the outer wall of the washing cooling tower (2) and is connected to the washing tower spray head (9) in its inner cavity. The top of the washing cooling tower (2) is connected to the acetylene cooler (12) through the acetylene pipeline (10).
2. The internal circulation system for washing and cooling water in a dry acetylene generator according to claim 1, characterized in that: The acetylene generator (1) is equipped with a motor (4) at the top, and the main shaft of the motor (4) passes through the top of the acetylene generator (1) and is connected to a stirring paddle (15).
3. The internal circulation system for washing and cooling water in a dry acetylene generator according to claim 2, characterized in that: The washing tower spray head (9) is provided in multiple ways, and the multiple washing tower spray heads (9) are connected through the washing outlet pipe (8).