Heavy aromatic hydrocarbon water-carrying stable combustion device
By using a first-stage stationary tank and a second-stage stationary tank for stand-alone separation in the heavy aromatic waste liquid treatment, the treatment of the oil phase, water phase and gas phase is controlled, and the fire extinguishing problem caused by excessive moisture in the combustion furnace is solved, and stable combustion and normal operation of the medium-pressure steam pipeline network is achieved.
Patent Information
- Application Number
- CN202420528018.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-19
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-03-19
AI Technical Summary
When burning heavy aromatic waste liquid, the combustion furnace fire extinguishing and shutting down due to excessive moisture content, affecting the normal operation of the medium-pressure steam pipeline network.
A heavy aromatic hydrocarbon water-stable combustion device is designed, and the oil phase, water phase and gas phase are separated by the first-stage static tank and the second-stage static tank are extracted respectively, and the oil phase with reduced moisture content is ensured to enter the combustion furnace for stable combustion.
The stable combustion of heavy aromatic waste liquid is achieved, the combustion furnace fire extinguishing and shutdown is avoided, and the normal operation of the medium-pressure steam pipeline network is ensured.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of combustion devices, and in particular relates to a heavy aromatic hydrocarbon with water stable combustion device. Background Art
[0002] The ethane cracking and ethylene production unit produces heavy aromatic products, and the heavy aromatic waste liquid needs to be burned. The heavy aromatic waste liquid is mainly composed of ethylene tar and ethylene butter. The existing technology directly introduces the heavy aromatic waste liquid into the combustion furnace for combustion. However, the production of heavy aromatic waste liquid is inevitably accompanied by the entrainment of "clear water". Since the physical properties of ethylene tar, ethylene butter and water are quite different, the "oil-in-water" phenomenon is easy to occur in the storage tank. However, when the heavy aromatic waste liquid contains heavy water, it will cause the combustion furnace to extinguish and shut down. In particularly serious cases, it will have an impact on the medium-pressure steam pipeline network, affecting the long-term operation of the core units of various devices powered by the medium-pressure steam pipeline network. Utility Model Content
[0003] In order to solve the above-mentioned deficiencies of the prior art, the utility model provides a heavy aromatics with water stable combustion device, the technical solution includes:
[0004] A primary static tank, a secondary static tank and a waste liquid tank, wherein the primary static tank is provided with a feed pipe, the primary static tank and the secondary static tank are connected by a pipeline and a pump 1 and a valve 1 are provided on the pipeline, and a pipeline is provided on one side of the secondary static tank and a pump 2 and a valve 2 are provided on the pipeline;
[0005] The first-stage static tank is connected to the waste liquid tank through a pipeline, and a pump three and a valve three are arranged on the pipeline;
[0006] The secondary static tank is connected to the waste liquid tank through a pipeline, and a pump 4 and a valve 4 are arranged on the pipeline;
[0007] A pipeline is arranged on one side of the waste liquid tank and a pump five and a valve five are arranged on the pipeline. Pipes are arranged on both the primary static tank and the secondary static tank.
[0008] Furthermore, the first-stage static tank and the second-stage static tank are respectively provided with a tuning fork density meter 1 and a tuning fork density meter 2.
[0009] Furthermore, a buffer tank is provided on one side of the secondary static tank, a pipeline on the pump 2 is connected to the buffer tank, a pipeline is provided on one side of the buffer tank and a pump 6 and a valve 6 are provided on the pipeline, and a pipeline is provided on the upper part of the buffer tank.
[0010] Compared with the prior art, the utility model has the following advantages:
[0011] After the heavy aromatic waste liquid is allowed to stand in the primary standing tank and the secondary standing tank, the oil phase, water phase and gas phase in the heavy aromatics are separated, the gas phase is discharged and recovered through the pipelines at the top of the primary standing tank and the secondary standing tank, the water phase enters the waste liquid tank through the pipeline and is recovered, and the oil phase with reduced water content is sent to the combustion furnace through the pipeline, so that the combustion furnace can stably burn the heavy aromatic waste liquid. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the process of the utility model.
[0013] Figures: 1 first-level still tank, 2 second-level still tank, 3 waste liquid tank, 4 feed pipe, 5 pump one, 6 valve one, 7 pump two, 8 valve two, 9 pump three, 10 valve three, 11 pump four, 12 valve four, 13 pump five, 14 valve five, 15 tuning fork density meter one, 16 tuning fork density meter two, 17 buffer tank, 18 pump six, 19 valve six. 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] The present invention provides a heavy aromatic hydrocarbon with water stable combustion device. In the implementation of the scheme, the heavy aromatic hydrocarbon waste liquid enters the first-level still tank 1 through the feed pipe 4. After standing for 8 hours, the steam part in the first-level still tank 1 is discharged through the pipeline on the upper part of the first-level still tank 1. Since the density of the oil phase is smaller than that of the water phase, the oil phase is in the upper layer and the water phase is in the lower layer. The valve three 10 is opened, and the water phase in the lower layer of the first-level still tank 1 is pumped into the waste liquid tank 3 through the bottom pipeline by the pump three 9. After a period of time, the valve three 10 is closed.
[0018] Open valve 16, the oil phase in the first-level still tank 1 is pumped into the second-level still tank 2 through the pipeline by pump 15 for further separation of the oil phase, gas phase and water phase. The steam part of the gas phase is discharged and collected through the pipeline at the upper part of the second-level still tank 2. Open valve 4 12, the water phase in the second-level still tank 2 is pumped into the waste liquid tank 3 through the pipeline at the bottom by pump 4 11 for collection. After a period of time, close valve 3 10, open valve 2 8, and the oil phase in the second-level still tank 2 is pumped into the combustion furnace through the pipeline by pump 2 7 for combustion.
[0019] In one embodiment, the discharge amount of the oil phase and the water phase in the first-level still tank 1 and the second-level still tank 2 are accurately controlled by tuning fork density meter 15 and tuning fork density meter 2 16 respectively provided on the first-level still tank 1 and the second-level still tank 2. For example, when the set density value of the oil-water mixture is measured in the first-level still tank 1 or the second-level still tank 2, the automatic feedback signal closes valve three 10 or valve four 12.
[0020] In one embodiment, a buffer tank 17 is added to one side of the secondary static tank 2, and the valve 2 8 is opened, and the oil phase in the secondary static tank 2 is pumped into the buffer tank 17 through the pipeline by the pump 2 7, and the valve 6 19 is opened, and the oil phase in the secondary static tank 2 is pumped into the combustion furnace evenly and smoothly by the pump 6 to prevent the oil phase in the combustion furnace from entering too quickly and affecting the combustion.
[0021] A pipeline is arranged on the upper part of the buffer tank 17 to further discharge the recovered gas phase.
Claims
1. A heavy aromatics with water stable combustion device, characterized in that: The invention comprises a primary static tank (1), a secondary static tank (2) and a waste liquid tank (3), wherein the primary static tank (1) is provided with a feed pipe (4), the primary static tank (1) and the secondary static tank (2) are connected via a pipeline and a pump (5) and a valve (6) are provided on the pipeline, and a pipeline is provided on one side of the secondary static tank (2) and a pump (7) and a valve (8) are provided on the pipeline; The first-stage static tank (1) and the waste liquid tank (3) are connected via a pipeline, and a pump three (9) and a valve three (10) are provided on the pipeline; The secondary static tank (2) and the waste liquid tank (3) are connected via a pipeline, and a pump four (11) and a valve four (12) are provided on the pipeline; A pipeline is provided on one side of the waste liquid tank (3) and a pump five (13) and a valve five (14) are provided on the pipeline. Pipelines are provided on both the first-stage static tank (1) and the second-stage static tank (2).
2. A heavy aromatics with water stable combustion device according to claim 1, characterized in that: The first-stage static tank (1) and the second-stage static tank (2) are respectively provided with a tuning fork density meter 1 (15) and a tuning fork density meter 2 (16).
3. A heavy aromatics with water stable combustion device according to claim 1, characterized in that: A buffer tank (17) is provided on one side of the secondary static tank (2); a pipeline on the second pump (7) is connected to the buffer tank (17); a pipeline is provided on one side of the buffer tank (17) and a pump six (18) and a valve six (19) are provided on the pipeline; and a pipeline is provided on the upper part of the buffer tank (17).