Liquid sulfur filtering device and sulfur melting system

Abstract

The utility model discloses a liquid sulfur filtering device and a sulfur melting system, and relates to the technical field of liquid sulfur filtration, the liquid sulfur filtering device mainly comprises a filtering shell, the filtering shell is provided with a liquid sulfur inlet and a liquid sulfur outlet, the liquid sulfur inlet is used for being communicated with a sulfur melting tank, and the liquid sulfur outlet is used for being communicated with a filtering tank; a filtering mechanism is also arranged in the filtering shell and is used for filtering liquid sulfur. The sulfur melting system comprises a sulfur melting tank, a filter tank, a filter and the liquid sulfur filter device. According to the utility model, a settling tank is omitted, so that the problem that the liquid sulfur pump and the filter tank are frequently blocked and need to be shut down for maintenance is solved, and the running rate of the sulfur melting process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid sulfur filtration, in particular to a liquid sulfur filtration device and a sulfur melting system. Background Art

[0002] At present, a settling tank 200 is usually adopted in a sulfur melting device to perform sedimentation and purification pretreatment on the melted liquid sulfur. After treating some impurities and sundries in the liquid sulfur, the liquid sulfur is further subjected to fine filtration treatment to produce qualified liquid sulfur products for use in the subsequent sulfuric acid production device. Specifically, as Figure 1 shown, after solid sulfur enters the sulfur melting tank 100, steam is introduced through a steam coil for heating to melt the solid sulfur into liquid sulfur. The melted liquid sulfur enters the settling tank 200 through an overflow pipe. Impurities and sundries sink to the bottom of the settling tank 200 by gravity and are regularly discharged through a slag discharge port 201. The liquid sulfur after sedimentation and purification enters the filtration tank 300 through the overflow pipe of the settling tank 200. The liquid sulfur in the filtration tank 300 is sent to a filter 400 by a liquid sulfur pump 302 for fine filtration to produce qualified liquid sulfur products.

[0003] However, due to the gradual deterioration of the quality of solid sulfur and the need for long-distance and multiple transfers of solid sulfur to reach the production workshop, in addition to impurities, sundries such as broken packaging bags, binding ropes, wood chips, rubber, plastics, etc. will be brought in during the transfer; in actual production, the process of using a settling tank to settle impurities and sundries has the following disadvantages:

[0004] a) It can settle impurities and sundries with a relatively large specific gravity, but sundries with a relatively light specific gravity are easily floating on the surface of the liquid sulfur and will overflow to the filtration tank with the liquid sulfur. Therefore, the treatment effect of sundries is poor;

[0005] b) The production needs to be stopped for slag discharge and cleaning of the settling tank;

[0006] c) The valve core of the slag discharge ball valve at the bottom of the settling tank is easily bonded by slag and cannot be opened or blocked by the settled sundries at the outlet, losing the slag discharge function;

[0007] d) Due to the high temperature of the liquid sulfur, the safety risk is relatively high during slag discharge, and the odor is relatively large;

[0008] e) Some liquid sulfur will be doped during slag discharge, and the sulfur loss rate is high;

[0009] f) The sulfur on the top of the settling tank is easily caked, and the maintenance labor intensity is high during normal production.

[0010] In view of the above problems existing in the process of using a settling tank to settle impurities and sundries, currently, improvements are usually made by installing a filter at the inlet of the liquid sulfur pump or installing a filter screen at the outlet of the settling tank. Although certain effects have been achieved, the effects are limited and there are defects. Specifically:

[0011] Installing a filtering device at the inlet of the liquid sulfur pump has the following disadvantages:

[0012] a) Debris in the filter tank cannot be removed in time, and it will accumulate more and more, resulting in a gradually shortened cycle for disassembling and lifting the liquid sulfur pump to clean the filter tank;

[0013] b) Debris will accumulate in the filter tank, and the filter tank needs to be cleaned frequently;

[0014] c) Cleaning can only be carried out after stopping production and cooling, and the parking time is long.

[0015] Installing a filter screen at the outlet of the settling tank has the following disadvantages:

[0016] a) Sulfur on the top of the settling tank is prone to caking, often causing the filter screen to be blocked or damaged due to frequent cleaning, losing its function;

[0017] b) Debris intercepted by the filter screen cannot be removed in time.

[0018] Therefore, there is an urgent need to provide a liquid sulfur filtering device to solve the above problems existing in the prior art. Utility Model Content

[0019] The purpose of the present utility model is to provide a liquid sulfur filtering device and a sulfur melting system to solve the problems existing in the above prior art, cancel the use of the settling tank, avoid the problems of frequent blockage of the liquid sulfur pump and the filter tank and the need for frequent shutdown maintenance, and improve the operation rate of the sulfur melting process.

[0020] To achieve the above purpose, the present utility model provides the following solutions:

[0021] The present utility model provides a liquid sulfur filtering device, including a filtering housing, on which a liquid sulfur inlet and a liquid sulfur outlet are provided. Among them, the liquid sulfur inlet is used to communicate with the sulfur melting tank, and the liquid sulfur outlet is used to communicate with the filter tank; a filtering mechanism is further provided in the filtering housing for filtering liquid sulfur.

[0022] Preferably, the liquid sulfur inlet is provided at the top of one side of the filtering housing, and the liquid sulfur outlet is provided at the bottom of the other side of the filtering housing.

[0023] Preferably, an opening is provided at the top of the filtering housing, and a top cover is provided at the opening.

[0024] Preferably, the filtering mechanism includes a filter plate, and filtering holes are provided on the filter plate.

[0025] Preferably, a plurality of filter plates are arranged side by side along the flowing direction of the liquid sulfur.

[0026] Preferably, an overflow port is further provided at the top of the filter plate.

[0027] Preferably, a heat preservation mechanism is further provided on the filter housing for heat preservation.

[0028] Preferably, the heat preservation mechanism is a heat preservation ring which is arranged around the filter housing.

[0029] Preferably, the filter housing is a cuboid housing.

[0030] The utility model further provides a sulfur melting system, which comprises a sulfur melting tank, a filtering tank, a filter and the liquid sulfur filtering device as described above.

[0031] The utility model has achieved the following technical effects compared with the prior art:

[0032] In the liquid sulfur filtering device of the utility model, the filter housing is provided with a liquid sulfur inlet and a liquid sulfur outlet. Among them, the liquid sulfur inlet is used to communicate with the sulfur melting tank, and the liquid sulfur outlet is used to communicate with the filtering tank; a filtering mechanism is further arranged in the filter housing for filtering liquid sulfur. The liquid sulfur filtering device of the utility model is used to replace the sedimentation tank and is arranged between the sulfur melting tank and the filtering tank to filter liquid sulfur, canceling the use of the sedimentation tank and avoiding the defects existing in the traditional process of sedimentation treatment of impurities and sundries by using the sedimentation tank; moreover, the liquid sulfur filtering device in the utility model can pre-treat liquid sulfur, filter out the large lumps blocking the liquid sulfur pump and the filtering tank, and enable the small lumps of impurities, sundries and liquid sulfur to be sent into the filter by the liquid sulfur pump for fine filtration together, avoiding the problem that the liquid sulfur pump and the filtering tank are frequently blocked and often need to be shut down for maintenance, and improving the operation rate of the sulfur melting process. Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0034] Figure 1 It is a schematic structural diagram of a sulfur melting system in the prior art;

[0035] Figure 2 It is a schematic structural diagram of the sulfur melting system in the embodiment of the present utility model.

[0036] In the figure: 100 - sulfur melting tank, 101 - first agitator, 200 - settling tank, 201 - slag discharge port, 300 - filtration tank, 301 - second agitator, 302 - liquid sulfur pump, 400 - filter, 500 - liquid sulfur filtration device, 501 - liquid sulfur inlet, 502 - liquid sulfur outlet, 503 - top cover, 504 - filter plate, 505 - overflow port, 506 - insulation ring. Detailed implementation manners

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] The purpose of the present invention is to provide a liquid sulfur filtration device and a sulfur melting system to solve the problems existing in the above-mentioned prior art, eliminate the use of the settling tank, avoid the problem that the liquid sulfur pump and the filtration tank are frequently blocked and often need to be shut down for maintenance, and improve the operation rate of the sulfur melting process.

[0039] To make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0040] Embodiment 1

[0041] As Figure 2 shown, a liquid sulfur filtration device 500 is provided in this embodiment, including a filtration housing. A liquid sulfur inlet 501 and a liquid sulfur outlet 502 are provided on the filtration housing. Among them, the liquid sulfur inlet 501 is used to communicate with the sulfur melting tank 100, and the liquid sulfur outlet 502 is used to communicate with the filtration tank 300; a filtration mechanism is further provided in the filtration housing for filtering liquid sulfur.

[0042] The liquid sulfur filtration device 500 in this embodiment is used to replace the settling tank 200 and is arranged between the sulfur melting tank 100 and the filtration tank 300 to filter liquid sulfur, eliminating the use of the settling tank 200 and being able to avoid the defects existing in the traditional process of settling impurities and sundries by using the settling tank 200; moreover, the liquid sulfur filtration device 500 in this embodiment can pre-treat liquid sulfur, filter out the large lumps that block the liquid sulfur pump 302 and the filtration tank 300, and enable the small lumps of impurities, sundries and liquid sulfur to be sent to the filter 400 through the liquid sulfur pump 302 for fine filtration, avoiding the problem that the liquid sulfur pump 302 and the filtration tank 300 are frequently blocked and often need to be shut down for maintenance, and improving the operation rate of the sulfur melting process.

[0043] In this embodiment, the liquid sulfur inlet 501 is arranged at the top of one side of the filtering housing to prevent the inlet from being blocked due to debris not being cleaned in time; the liquid sulfur outlet 502 is arranged at the bottom of the other side of the filtering housing to prevent liquid from accumulating in the filtering housing.

[0044] In this embodiment, an opening is provided at the top of the filtering housing, and a top cover 503 is provided at the opening. By opening the top cover 503, it is convenient to clean the debris in the filtering housing.

[0045] In this embodiment, the filtering mechanism includes a filter plate 504. Filter holes are formed in the filter plate 504 for liquid sulfur to pass through. Moreover, a plurality of the filter plates 504 are arranged side by side along the flowing direction of the liquid sulfur, capable of performing multiple filtrations to improve the filtering effect. And along the flowing direction of the liquid sulfur, the pore diameters of the filter holes of the plurality of filter plates 504 can gradually decrease to intercept debris of different volumes; wherein, the pore diameter of the filter holes can be adjusted according to the use effect.

[0046] Further, an overflow port 505 is also provided at the top of the filter plate 504 to prevent the overflow of the tank caused by the blockage of the filter holes on the filter plate 504 not being cleaned in time.

[0047] In this embodiment, a heat preservation mechanism is further provided on the filtering housing for heat preservation; wherein, the heat preservation mechanism can be selected according to specific working requirements. For example, it can be a heating pipe or a heat preservation ring 506, and the heat preservation ring 506 can be electrified for heating.

[0048] As a preferred implementation manner, in this embodiment, the heat preservation mechanism is a heat preservation ring 506. The heat preservation ring 506 is arranged around the filtering housing, which not only solves the problem of easy cooling and solidification of liquid sulfur, but also reduces the manufacturing difficulty, and at the same time avoids a series of problems such as the safety risks brought by the traditional filter using a sandwich heat preservation structure and the problems of pressure vessel design and manufacturing due to belonging to the category of pressure vessels.

[0049] In this embodiment, the filtering housing is preferably a cuboid housing, and other structures of filtering housings can also be selected, such as a semi-cylindrical structure, etc.

[0050] The comparison of the use effects of the liquid sulfur filtering device in this embodiment and the traditional sedimentation tank is as follows:

[0051]

[0052] This embodiment also provides a sulfur melting system, including a sulfur melting tank 100, a filtering tank 300, a filter 400, and the liquid sulfur filtering device 500 as described above.

[0053] In this utility model, specific examples are used to elaborate on the principle and implementation manner of this utility model. The description of the above embodiments is only used to help understand the method and its core idea of this utility model; at the same time, for those of ordinary skill in the art, according to the idea of this utility model, there will be changes in the specific implementation manner and application scope. To sum up, the content of this specification should not be construed as a limitation to this utility model.

Claims

1. A liquid sulfur filtering device, characterized in that: It comprises a filter housing, on which a liquid sulfur inlet and a liquid sulfur outlet are provided, wherein the liquid sulfur inlet is used to communicate with a molten sulfur tank, and the liquid sulfur outlet is used to communicate with a filter tank; a filter mechanism is also provided in the filter housing for filtering the liquid sulfur; the filter mechanism comprises a filter plate, on which filter holes are provided, and a plurality of filter plates are arranged side by side along the flow direction of the liquid sulfur, and the apertures of the filter holes of the plurality of filter plates are gradually reduced to intercept debris of different volumes; an overflow port is also provided on the top of the filter plate, which can prevent the filter holes on the filter plate from clogging and overflowing the tank due to failure to clean them in time.

2. The liquid sulfur filtering device according to claim 1, characterized in that: The liquid sulfur inlet is arranged at the top of one side of the filter housing, and the liquid sulfur outlet is arranged at the bottom of the other side of the filter housing.

3. The liquid sulfur filtering device according to claim 1, characterized in that: The top of the filter housing is provided with an opening, and a top cover is provided at the opening.

4. The liquid sulfur filtering device according to claim 1, characterized in that: The filter housing is also provided with a heat preservation mechanism for heat preservation.

5. The liquid sulfur filtering device according to claim 4, characterized in that: The heat-insulating mechanism is a heat-insulating ring, and the heat-insulating ring is arranged around the filter housing.

6. The liquid sulfur filtering device according to claim 1, characterized in that: The filter housing is a rectangular parallelepiped housing.

7. A sulfur melting system, characterized in that: It comprises a sulfur melting tank, a filter tank, a filter and a liquid sulfur filtering device as described in any one of claims 1 to 6.

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