Sodium hydrosulfide loading and feeding system

Abstract

The utility model relates to the field of sodium hydrosulfide loading of reforming regeneration desulfurization units, in particular to a sodium hydrosulfide loading and feeding system which comprises a sodium hydrosulfide storage tank, a loading pipeline, a loading pump and a lifting pipe, the lifting pipe is fixed at the bottom of the sodium hydrosulfide storage tank and longitudinally arranged, a circulation opening is formed in the upper portion of the lifting pipe, and the loading pipeline is communicated with the loading pump. The circulation opening is immersed in a sodium hydrosulfide solution, the lifting pipe is communicated with the sodium hydrosulfide storage tank through the circulation opening, the height of the circulation opening is higher than that of a settling area in the sodium hydrosulfide storage tank, and the inlet end of the loading pipeline penetrates through an outlet of the sodium hydrosulfide storage tank to be connected to the lifting pipe. And the outlet end of the loading pipeline is connected to a sodium hydrosulfide tank car through a loading pump. The lifting pipe increases the solution suction height of the feeding port of the loading pump, the possibility that crystal precipitates at the bottom of the sodium hydrosulfide storage tank enter a loading pipeline is greatly reduced, and the product concentration is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of sodium hydrosulfide loading of reforming regeneration desulfurization unit, specifically relates to a sodium hydrosulfide loading feeding system. BACKGROUND

[0002] Because sodium hydrosulfide loading process in desulfurization unit is easy to load viscous material such as sodium sulfide and sodium bicarbonate into tank car and affect product purity, and form crystalline material to cause loading difficulty, therefore it is needed to reform sodium hydrosulfide loading line, improve product purity and facilitate loading. SUMMARY

[0003] According to the defects of the prior art, the utility model aims at providing a sodium hydrosulfide loading feeding system, which reforms the inlet of the sodium hydrosulfide loading line to improve product purity and facilitate loading.

[0004] To achieve the above object, the utility model adopts the technical scheme of a sodium hydrosulfide loading feeding system, which comprises a sodium hydrosulfide storage tank, a loading pipeline, a loading pump and a lifting pipe, the lifting pipe is fixed to the bottom of the sodium hydrosulfide storage tank, the lifting pipe is longitudinally arranged, a flow-through opening is formed in the upper part of the lifting pipe, the flow-through opening is immersed in the sodium hydrosulfide solution, the lifting pipe is communicated with the sodium hydrosulfide storage tank through the flow-through opening, the height of the flow-through opening is higher than the height of the precipitation zone in the sodium hydrosulfide storage tank, the inlet end of the loading pipeline is connected to the lifting pipe through the outlet of the sodium hydrosulfide storage tank, and the outlet end of the loading pipeline is connected to the sodium hydrosulfide tank car through the loading pump.

[0005] Based on the above technical scheme, the height of the precipitation zone in the sodium hydrosulfide storage tank is the highest height of the precipitation in the tank.

[0006] Further, the flow-through opening is arranged on the side surface of the upper part of the lifting pipe, and the top of the lifting pipe is blocked by a cover plate.

[0007] Further, the cover plate extends to the upper side of the flow-through opening in the horizontal direction to shield the flow-through opening.

[0008] Further, the lifting pipe is arranged close to the outlet of the sodium hydrosulfide storage tank, the inlet end of the loading pipeline is connected to the outlet of the lifting pipe, the center of the outlet pipe section of the lifting pipe coincides with the center of the outlet pipe section of the sodium hydrosulfide storage tank, and the outlet pipe section of the lifting pipe is connected to the inlet end of the loading pipeline through a flange.

[0009] Further, the bottom of the lifting pipe is fixed to the bottom of the sodium hydrosulfide storage tank, and the bottom of the lifting pipe is not communicated with the sodium hydrosulfide storage tank.

[0010] Further, the lifting pipe is a DN200 pipeline with an axial height of 1.5 meters.

[0011] Further, the sodium hydrosulfide storage tank is 5.9 meters high, the liquid level in the tank is up to 5.2 meters, and the precipitation height in the tank is up to 1.5 meters.

[0012] Further, a tank outlet valve and a pump outlet valve are arranged on the loading pipeline, the tank outlet valve is arranged at the tank outlet pipe section of the sodium hydrosulfide storage tank, and the pump outlet valve is arranged at the pump outlet pipe section of the loading pump.

[0013] Further, a self-circulation pipeline is connected to the sodium hydrosulfide storage tank, the inlet of the self-circulation pipeline is connected to the loading pipeline in front of the tank outlet valve, the outlet of the self-circulation pipeline is connected to the inlet of the sodium hydrosulfide storage tank, and a communication valve is arranged on the self-circulation pipeline.

[0014] Further, two loading pumps are arranged in parallel.

[0015] The beneficial effects of the present application are that a vertical lifting pipe is added in the sodium hydrosulfide storage tank, the lifting pipe is communicated with the sodium hydrosulfide storage tank through a flow-through opening at the upper part of the lifting pipe, the loading pump is connected to the lifting pipe to pump out the sodium hydrosulfide solution for loading, the lifting pipe increases the height of the solution suctioned by the feeding inlet of the loading pump, greatly reduces the possibility of the crystallization precipitate at the bottom of the sodium hydrosulfide storage tank entering the loading pipeline, and effectively improves the product purity. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Fig. 1 is a schematic diagram of the sodium hydrosulfide loading and feeding system of the present application;

[0017] In the figure: 1, sodium hydrosulfide storage tank, 2, loading pipeline, 3, loading pump, 4, lifting pipe, 5, flow-through opening, 6, cover plate, 7, sodium hydrosulfide tank car, 8, flange, 9, tank outlet valve, 10, pump outlet valve, 11, self-circulation pipeline, 12, communication valve. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0019] Referring to the drawings Figure 1The application discloses a sodium hydrosulfide loading feeding system, which comprises a sodium hydrosulfide storage tank 1, a loading pipeline 2, a loading pump 3 and a lifting pipe 4, wherein the lifting pipe 4 is fixed to the bottom of the sodium hydrosulfide storage tank 1, the lifting pipe 4 is a DN200 pipeline with an axial height of 1.5 meters, the lifting pipe 4 is longitudinally arranged, the bottom of the lifting pipe 4 is fixed to the bottom of the sodium hydrosulfide storage tank 1, and the bottom of the lifting pipe 4 is not communicated with the sodium hydrosulfide storage tank 1.

[0020] According to the technical scheme, the height of the precipitation area in the sodium hydrosulfide storage tank 1 is the highest height of the precipitation in the tank. A vertical lifting pipe 4 is arranged in the sodium hydrosulfide storage tank 1, the lifting pipe 4 is communicated with the sodium hydrosulfide storage tank 1 through an upper flow port 5 of the lifting pipe 4, and the loading pump 3 is connected to the lifting pipe 4 to pump out the sodium hydrosulfide solution for loading. The lifting pipe 4 increases the height of the solution suction of the feeding inlet of the loading pump 3, the crystalline substance is deposited in a sodium hydrosulfide static area outside the lifting pipe 4 after the height is increased, and the crystalline substance in the lifting pipe is reduced. The cover plate prevents the sodium hydrosulfide containing the crystalline substance from entering the lifting pipe 4 and then entering the loading pipeline 2.

[0021] Further, the lifting pipe 4 is arranged close to the outlet of the sodium hydrosulfide storage tank 1, the inlet end of the loading pipeline 2 is connected with the outlet of the lifting pipe 4, the center of the outlet pipe section of the lifting pipe 4 is coincided with the center of the outlet pipe section of the sodium hydrosulfide storage tank 1, the loading pipeline 2 is conveniently connected, and the outlet pipe section of the lifting pipe 4 and the inlet end of the loading pipeline 2 are connected through a flange 8, so that the loading pipeline 2 is conveniently disassembled and maintained.

[0022] In the embodiment, the height of the sodium hydrosulfide storage tank 1 is 5.9 meters, the highest liquid level in the tank is 5.2 meters, and the highest height of the precipitation in the tank is 1.5 meters. The precipitation is slowly accumulated, and the tank is cleaned when the accumulation height reaches 1.5 meters.

[0023] Further, the loading pipeline 2 is provided with a tank outlet valve 9 and a pump outlet valve 10, the tank outlet valve 9 is arranged at the outlet pipe section of the sodium hydrosulfide storage tank 1, and the pump outlet valve 10 is arranged at the outlet pipe section of the loading pump 3.

[0024] Further, the sodium hydrosulfide storage tank 1 is connected with a self-circulation pipeline 11, the inlet of the self-circulation pipeline 11 is connected with the loading pipeline 2 in front of the tank outlet valve 10, the outlet of the self-circulation pipeline 11 is connected with the inlet of the sodium hydrosulfide storage tank 1, and the self-circulation pipeline 11 is provided with a communication valve 12.

[0025] Further, the loading pump 3 is provided with two pumps in parallel, one for use and one for standby, so as to facilitate maintenance and replacement.

[0026] The embodiment adds a DN200 pipeline modified length (axial height) of 1.5 meters of the lifting pipe 4 in the sodium hydrosulfide storage tank 1, the lifting pipe 4 functions to reduce the sodium sulfide and other crystalline substances from being blocked in the pipeline by the loading pump 3, so as to affect normal loading and product quality, the lifting pipe 4 is provided with a flow-through opening 5 formed by an opening or a hole at the upper side of the lifting pipe 4 as a pump inlet, and a cover plate 6 is added above the lifting pipe 4, which functions to avoid new material from entering the tooling without being settled when the pump is self-circulating.

[0027] It should be noted that the parts not described in detail in the utility model are prior art.

[0028] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, a particular orientation and operation, and therefore cannot be understood as a limitation on the utility model.

[0029] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0030] In the utility model, unless another definite provision and limitation, the term "mount", "link", "connect", "fix" and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection;Can be direct connection, also can pass through intermediate medium indirectly connect, can be two element inside's intercommunication or two element's mutual action relation, unless another definite limitation.For the ordinary skill in the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0031] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature can be that first and second features directly contact, or first and second features indirectly contact by intermediate medium.Moreover, first feature "over", "above" and "on" second feature can be that first feature is directly above or obliquely above second feature, or just indicates that the horizontal height of first feature is higher than that of second feature.First feature "under", "below" and "under" second feature can be that first feature is directly below or obliquely below second feature, or just indicates that the horizontal height of first feature is less than that of second feature.

[0032] It should be noted that when an element is referred to as "fixed to" or "set to" another element, it can be directly on another element or there can be a middle element.When an element is referred to as "connected to" another element, it can be directly connected to another element or there can be a middle element.The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0033] The above-mentioned is only the best embodiment of the utility model.Obviously, the utility model is not limited to the above-mentioned embodiment, and there can be many variations.The ordinary skill in the art can directly derive or intuitively think of all variations from the disclosed content of the utility model, which should be considered as the protection scope of the utility model.

Claims

1. A sodium hydrosulfide loading and feeding system, characterized in that: The system includes a sodium hydrosulfide storage tank, a loading pipeline, a loading pump, and a riser. The riser is fixed to the bottom of the sodium hydrosulfide storage tank and is arranged longitudinally. A flow port is opened at the top of the riser and is immersed in the sodium hydrosulfide solution. The riser is connected to the sodium hydrosulfide storage tank through the flow port. The inlet end of the loading pipeline passes through the outlet of the sodium hydrosulfide storage tank and is connected to the riser. The outlet end of the loading pipeline is connected to the sodium hydrosulfide tank truck via the loading pump.

2. The sodium hydrosulfide loading and feeding system according to claim 1, characterized in that: The flow port is located on the side surface of the upper part of the riser pipe, and the top of the riser pipe is sealed by a cover plate.

3. The sodium hydrosulfide loading and feeding system according to claim 2, characterized in that: The cover plate extends horizontally above the flow opening to block it.

4. The sodium hydrosulfide loading and feeding system according to claim 1, characterized in that: The riser pipe is located near the outlet of the sodium hydrosulfide storage tank, the inlet end of the loading pipeline is connected to the outlet of the riser pipe, and the center of the outlet section of the riser pipe coincides with the center of the outlet section of the sodium hydrosulfide storage tank. The outlet section of the riser pipe is connected to the inlet end of the loading pipeline via a flange.

5. The sodium hydrosulfide loading and feeding system according to claim 1, characterized in that: The bottom of the riser pipe is fixed to the bottom of the sodium hydrosulfide storage tank, and the bottom of the riser pipe is not connected to the sodium hydrosulfide storage tank.

6. A sodium hydrosulfide loading and feeding system according to any one of claims 1-5, characterized in that: The riser is a DN200 pipeline with an axial height of 1.5 meters.

7. A sodium hydrosulfide loading and feeding system according to any one of claims 1-5, characterized in that: The sodium hydrosulfide storage tank is 5.9 meters high, with a maximum liquid level of 5.2 meters and a maximum sedimentation height of 1.5 meters.

8. A sodium hydrosulfide loading and feeding system according to any one of claims 1-5, characterized in that: The loading pipeline is equipped with a tank outlet valve and a pump outlet valve. The tank outlet valve is located at the outlet pipe section of the sodium hydrosulfide storage tank, and the pump outlet valve is located at the outlet pipe section of the loading pump.

9. A sodium hydrosulfide loading and feeding system according to claim 8, characterized in that: The sodium hydrosulfide storage tank is connected to a self-circulating pipeline. The inlet of the self-circulating pipeline is connected to the loading pipeline before the tank outlet valve, and the outlet of the self-circulating pipeline is connected to the inlet of the sodium hydrosulfide storage tank. A connecting valve is installed on the self-circulating pipeline.

10. A sodium hydrosulfide loading and feeding system according to any one of claims 1-5, characterized in that: Two loading pumps are connected in parallel.

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