A PTA production water vapor compression heat pump pressure regulating device
By designing a water vapor compression heat pump pressure regulating device in the PTA device, the low-pressure steam is pressurized into sub-high-pressure steam, and the pressure attenuation is diverted into medium-pressure steam, the problem of low-pressure steam in the PTA device cannot be effectively utilized, and efficient resource utilization and energy-saving effects are achieved.
Patent Information
- Application Number
- CN202420751920.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-12
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-04-12
AI Technical Summary
In the prior art, the low-pressure steam generated by the PTA device cannot be effectively utilized, resulting in waste of resources and cannot meet the supply requirements of sub-high-pressure steam and medium-pressure steam users.
A PTA production water vapor compression heat pump pressure regulating device is designed. The low-pressure steam is pressurized into sub-high-pressure steam through the steam compression heat pump, and the sub-high-pressure steam is diverted into medium-pressure steam through pressure attenuation to meet the steam pressure needs of different users.
The low-pressure steam generated by the PTA device is effectively recycled and utilized, which reduces energy consumption and meets the supply requirements of sub-high-pressure steam and medium-pressure steam users, which is conducive to the energy-saving development of the enterprise.
Smart Images
Figure CN222732635U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of terephthalic acid production devices, and specifically relates to a water vapor compression heat pump pressure regulating device for PTA production. Background Art
[0002] PTA stands for terephthalic acid. A lot of low-pressure steam is produced in the production of PTA by a PTA device. If the low-pressure steam is directly discharged, it will cause a waste of resources. If it is directly used, it will not meet the supply requirements of sub-high-pressure steam users and medium-pressure steam users. In the prior art, the pipelines of high-pressure steam users are connected with the pipelines of sub-high-pressure steam users and medium-pressure steam users, and the high-pressure steam is distributed to the pipelines of sub-high-pressure steam users and medium-pressure steam users by reducing the pressure. However, the above technology causes a waste of the low-pressure steam generated by the PTA device, which is not conducive to the energy-saving development of the enterprise. Utility Model Content
[0003] In order to solve the above-mentioned deficiencies of the prior art, the utility model provides a PTA production water vapor compression heat pump pressure regulating device, and its technical solution includes:
[0004] The PTA device and the low-pressure steam pipeline are connected by a pipeline, and the PTA device and the low-pressure steam pipeline are characterized in that they also include:
[0005] A sub-high pressure steam pipeline, the sub-high pressure steam pipeline being connected to the low pressure steam pipeline through a pipeline and a steam compression heat pump;
[0006] A medium-pressure steam pipeline is connected to a secondary high-pressure steam pipeline through a pipeline and a control valve.
[0007] Furthermore, a pressure controller 1 is provided on the medium-pressure steam pipeline, and the medium-pressure steam pipeline is connected to the low-pressure steam pipeline through a pipeline and a control valve 2.
[0008] Furthermore, a second pressure controller is provided on the sub-high pressure steam pipeline, a high pressure steam pipeline is provided on one side of the sub-high pressure steam pipeline, and the high pressure steam pipeline is connected to the sub-high pressure steam pipeline through a pipeline and a control valve three.
[0009] Furthermore, a liquid level controller is provided on the PTA device, a pipeline is provided at the bottom of the PTA device and a control valve four is provided on the pipeline.
[0010] Compared with the prior art, the utility model has the following advantages:
[0011] The low-pressure steam generated by the PTA device is pressurized by a steam compression heat pump to become sub-high-pressure steam and transported into a sub-high-pressure steam pipeline to meet the use requirements of sub-high-pressure steam users. The sub-high-pressure steam in the sub-high-pressure steam pipeline is diverted into a medium-pressure steam pipeline through a part of the pipeline. During this process, the pressure of the sub-high-pressure steam in the pipeline decays and becomes medium-pressure steam when entering the medium-pressure steam pipeline to meet the use requirements of medium-pressure steam users. The utility model effectively recycles and utilizes the low-pressure steam generated by the PTA device, reduces energy consumption, and is beneficial to the energy-saving development of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a flow chart of the utility model.
[0013] Figures: 1PTA unit, 2 low-pressure steam pipeline, 3 secondary high-pressure steam pipeline, 4 steam compression heat pump, 5 medium-pressure steam pipeline, 6 control valve one, 7 pressure controller one, 8 control valve two, 9 pressure controller two, 10 high-pressure steam pipeline, 11 control valve three, 12 liquid level controller, 13 control valve four. DETAILED DESCRIPTION
[0014] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0015] Example
[0016] like Figure 1 As shown:
[0017] A PTA production water vapor compression heat pump pressure regulating device comprises a PTA device 1 and a low-pressure steam pipeline 2. The PTA device 1 and the low-pressure steam pipeline 2 are connected by a pipeline. The low-pressure steam generated by the PTA device 1 in the process of producing PTA enters the low-pressure steam pipeline 2 through a pipeline. A sub-high-pressure steam pipeline 3 is connected to the low-pressure steam pipeline 2 through a pipeline and a steam compression heat pump 4. The low-pressure steam in the low-pressure steam pipeline 2 is pressurized by the steam compression heat pump 4 to become sub-high-pressure steam and then enters the sub-high-pressure steam pipeline 3. A medium-pressure steam pipeline 5 is connected to the sub-high-pressure steam pipeline 3 through a pipeline and a control valve 6. The sub-high-pressure steam in the sub-high-pressure steam pipeline 3 is diverted through a part of the pipeline and enters the medium-pressure steam pipeline 5. In this process, due to the pressure attenuation of the sub-high-pressure steam in the pipeline, it becomes medium-pressure steam when entering the medium-pressure steam pipeline 5.
[0018] In the preferred embodiment, a pressure controller 7 is provided on the medium-pressure steam pipeline 5, and the medium-pressure steam pipeline 5 is connected to the low-pressure steam pipeline 2 through a pipeline and a control valve 2 8. When the pressure controller 7 detects that the steam pressure in the medium-pressure steam pipeline 5 is insufficient and becomes low-pressure steam, a signal is fed back to the control valve 2 8, so that the steam in the medium-pressure steam pipeline 5 enters the low-pressure steam pipeline 2 for use by low-pressure steam users.
[0019] In the preferred embodiment, a pressure controller 29 is provided on the secondary high-pressure steam pipeline 3, and a high-pressure steam pipeline 10 is provided on one side of the secondary high-pressure steam pipeline 3. The high-pressure steam pipeline 10 is connected to the secondary high-pressure steam pipeline 3 through a pipeline and a control valve 3 11. When the pressure controller 29 detects that the steam supply in the secondary high-pressure steam pipeline 3 is insufficient, a signal is fed back to the control valve 3 11 and the control valve 1 6, so that the high-pressure steam in the high-pressure steam pipeline 10 is diverted through the pipeline and decayed into secondary high-pressure steam to enter the secondary high-pressure steam pipeline 3, and continues to be diverted, decayed and reduced in pressure to become medium-pressure steam to enter the medium-pressure steam pipeline 5.
[0020] In the preferred embodiment, a liquid level controller 12 is provided on the PTA device 1, a pipeline is provided at the bottom of the PTA device 1 and a control valve 13 is provided on the pipeline. The condensate generated by the steam user is recovered and supplied to the PTA device through the pipeline. When the liquid level in the device reaches the set requirement, it is detected by the liquid level controller 12 and a signal is transmitted to the control valve 13 to close the control valve 13.
[0021] The method of using the utility model is as follows:
[0022] The low-pressure steam generated by the PTA device 1 enters the low-pressure steam pipeline 2 through the pipeline. The low-pressure steam in the low-pressure steam pipeline 2 is pressurized into sub-high-pressure steam through the pipeline and the steam compression heat pump 4 and enters the sub-high-pressure steam pipeline 3, and is transported to the sub-high-pressure steam users for use. The sub-high-pressure steam in the sub-high-pressure steam pipeline 3 is diverted through the pipeline and enters the medium-pressure steam pipeline 5. In this process, due to the pressure attenuation of the sub-high-pressure steam in the pipeline, it becomes medium-pressure steam when entering the medium-pressure steam pipeline 5, and is transported to the medium-pressure steam users for use.
Claims
1. A PTA production water vapor compression heat pump pressure regulating device, comprising a PTA device (1) and a low-pressure steam pipeline (2), wherein the PTA device (1) and the low-pressure steam pipeline (2) are connected via a pipeline, characterized in that: Also includes: A secondary high-pressure steam pipeline (3), the secondary high-pressure steam pipeline (3) being connected to the low-pressure steam pipeline (2) via a pipeline and a steam compression heat pump (4); A medium-pressure steam pipeline (5) is connected to the sub-high-pressure steam pipeline (3) through a pipeline and a control valve (6).
2. A PTA production water vapor compression heat pump pressure regulating device according to claim 1, characterized in that: The medium-pressure steam pipeline (5) is provided with a pressure controller 1 (7), and the medium-pressure steam pipeline (5) is connected to the low-pressure steam pipeline (2) through a pipeline and a control valve 2 (8).
3. A PTA production water vapor compression heat pump pressure regulating device according to claim 1, characterized in that: The secondary high-pressure steam pipeline (3) is provided with a second pressure controller (9), and a high-pressure steam pipeline (10) is provided on one side of the secondary high-pressure steam pipeline (3). The high-pressure steam pipeline (10) is connected to the secondary high-pressure steam pipeline (3) via a pipeline and a control valve (11).
4. A PTA production water vapor compression heat pump pressure regulating device according to claim 1, characterized in that: The PTA device (1) is provided with a liquid level controller (12), a pipeline is provided at the bottom of the PTA device (1) and a control valve four (13) is provided on the pipeline.