CN218403877U

CN218403877U - Layered precipitation type water-oil separation and collection device

Info

Publication number: CN218403877U
Application number: CN202221706433.5U
Authority: CN
Inventors: 梁增舰
Original assignee: Huarunze Tianjin Technology Co Ltd
Current assignee: Huarunze Tianjin Technology Co Ltd
Priority date: 2022-07-04
Filing date: 2022-07-04
Publication date: 2023-01-31
Anticipated expiration: 2032-07-04

Abstract

The utility model aims at providing a formula water-oil separation collection device deposits in layering, its characterized in that: the device comprises a support frame, an injection pipe group, a first-stage sedimentation tank, a second-stage adsorption tank, a third-stage purification tank, a medium storage tank, a filtering storage tank and a membrane filter, wherein the first-stage sedimentation tank is provided with a filter screen, a purification layer, a first-stage guide pump and a first-stage guide pipe; the whole set of facility adopts the layered precipitation formula structural design, and the structure thinking is clear, can realize precipitation separation, adsorption purification, fibre purification, and then accomplishes water-oil separation operation, has refined the purification flow to let water-oil separation more thoroughly, improved water-oil separation's quality and resource utilization, whole more green, be convenient for maintain.

Description

Layered precipitation type water-oil separation and collection device

Technical Field

The utility model relates to a water oil separation environmental protection facility field especially relates to a formula water oil separation collection device deposits in layering.

Background

With the increasing importance of the country on the environmental protection engineering, the supervision on the sewage discharge is more and more strict, and the difficulty of treating the oily sewage is very high. At present, oil-water separation is mainly based on density difference or different chemical properties of water and oil, and the separation of oil and water is completed by removing impurities by using a gravity settling principle or other physicochemical reactions, the structures of water-oil separation equipment used at the present stage are very simple and have single functions, and the operation is carried out independently, so that the maintenance is not convenient, the filtration flow cannot be refined, the precipitation separation, the purification and the purification are not integrated into a whole, the separation and the purification of water-oil liquid cannot be achieved, and the quality of water-oil separation cannot be improved; therefore, there is a need for improvements and upgrades to existing equipment configurations for water oil separation that are more fully functional so that they can address the problems and deficiencies described above in use.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an adopt layering sediment formula structural design for carry out screening filtration step by step to water oil mixing liquid, can realize the sedimentation separation, adsorb purification, fibre and purify, and then accomplish the water oil separating operation, refined the purification flow, thereby let water oil separating more thoroughly, improved water oil separating's quality and resource utilization, whole more green, the water oil separating collection device of being convenient for maintain.

The technical scheme of the utility model is that: the utility model provides a formula water oil separation collection device deposits in layering which characterized in that: comprises a support frame, an injection pipe group, a first-level sedimentation tank, a second-level adsorption tank, a third-level purification tank, a medium storage tank, a filtering storage tank and a membrane filter, wherein the injection pipe group is positioned at the top of the support frame, the injection pipe group is fixedly connected with the support frame, the first-level sedimentation tank is positioned at the position close to the top inside the support frame, the first-level sedimentation tank is detachably connected with the support frame, the first-level sedimentation tank is also provided with a filter screen, a purification layer, a first-level flow guide pump and a first-level flow guide pipe, the filter screen is positioned at the position close to the top inside the first-level sedimentation tank, the filter screen is detachably connected with the first-level sedimentation tank, the purification layer is positioned at the bottom inside the first-level sedimentation tank, the purification layer is detachably connected with the sedimentation tank, the first-level flow guide pump is positioned at one side of the first-level sedimentation tank, the first-level flow guide pump is fixedly connected with the first-level sedimentation tank, the first-stage guide pipe is positioned between the first-stage sedimentation tank and the second-stage adsorption tank, one end of the first-stage guide pipe is fixedly connected with the first-stage guide pump, the second-stage adsorption tank is positioned on the inner side of the support frame, the second-stage adsorption tank is positioned on the lower part of the first-stage sedimentation tank and is detachably connected with the support frame, the second-stage adsorption tank is also provided with a drain pan, an adsorption layer, a second-stage guide pump and a second-stage guide pipe, the drain pan is positioned on the inner side of the second-stage adsorption tank close to the top, the drain pan is detachably connected with the second-stage adsorption tank, the adsorption layer is positioned on the bottom of the inner side of the second-stage adsorption tank, the adsorption layer is detachably connected with the second-stage adsorption tank, the second-stage guide pump is positioned on one side of the second-stage adsorption tank and is fixedly connected with the second-stage adsorption tank, and the second-stage guide pipe is positioned between the second-stage adsorption tank and the third-stage purification tank, one end of the second-stage flow guide pipe is fixedly connected with the second-stage flow guide pump, the third-stage purification box is positioned on the inner side of the support frame, the third-stage purification box is positioned on the lower portion of the second-stage adsorption box and is detachably connected with the support frame, the medium storage tank is positioned on the upper portion of the support frame and is fixedly connected with the support frame by using bolts, the medium storage tank is also provided with a medium flow guide pump and a medium flow guide pipe, the medium flow guide pump is positioned on one side of the medium storage tank and is fixedly connected with the medium storage tank, the medium flow guide pipe is positioned between the medium storage tank and the third-stage purification box, one end of the medium flow guide pipe is fixedly connected with the medium flow guide pump, the third-stage purification box is also provided with a third-stage flow guide pump and a third-stage flow guide pipe, the third-stage flow guide pump is positioned on one side of the third-stage purification box and is fixedly connected with the third-stage purification box, the three-stage guide pipe is positioned between the three-stage purification box and the filtering storage tank, one end of the three-stage guide pipe is fixedly connected with the three-stage guide pump, the other end of the three-stage guide pipe is connected with the filtering storage tank, the filtering storage tank is positioned on one side of the support frame, the filtering storage tank is also provided with a dredging valve and a blow-down valve, the dredging valve is positioned at the position, close to the top, of one side of the filtering storage tank, one end of the dredging valve is fixedly connected with the filtering storage tank, the other end of the dredging valve is fixedly connected with the three-stage guide pipe, the blow-down valve is positioned at the bottom of the filtering storage tank, the blow-down valve is fixedly connected with the filtering storage tank, the membrane filter is positioned at the next stage of the filtering storage tank, the membrane filter is connected with the filtering storage tank by using a pipeline, the membrane filter is also provided with an output valve, and the output valve is positioned at one side of the membrane filter, the output valve is fixedly connected with the membrane filter.

Further, the first-level settling tank, the second-level adsorption tank and the third-level purification tank are all pull-type structure tank bodies with liquid level scales.

Further, the filter screen is a fiber net or an asbestos net.

Further, the purification layer is a stainless steel net with a multilayer staggered structure.

Further, the drain pan is of a funnel-shaped structure.

Further, the adsorption layer is a carbon fiber polymerization pad.

Further, the medium storage tank is a liquid wood pulp cellulose storage tank.

Further, the filtering storage tank is a multi-layer fiber net filtering tank.

Furthermore, the dredging valve, the blowdown valve and the output valve are all screwed ball valves.

The beneficial effects of the utility model reside in that: this water oil separation collection device adopts layering sediment formula structural design, and the structure thinking of whole set of facility is clear, and easy operation is convenient, can realize precipitation separation, absorption purification, fibre and purify, and then accomplishes water oil separation operation, has refined the purification flow to let water oil separation more thoroughly, improved water oil separation's quality and resource utilization, whole more green, be convenient for maintain.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is the internal structure schematic diagram of the one-level settling tank, the second-level adsorption tank and the third-level purification tank of the utility model.

Fig. 3 is the perspective structure diagram of the first-level settling tank, the second-level adsorption tank and the third-level purification tank of the present invention.

Fig. 4 is a schematic view of the structure of the drain pan of the present invention.

Wherein:

1. support frame 2, injection pipe group 3, one-level settling tank

4. Filter screen 5, purification layer 6, one-level guide pump

7. A first-stage flow guide pipe 8, a second-stage adsorption box 9 and a drain pan

10. Adsorption layer 11, second grade guiding flow pump 12, second grade honeycomb duct

13. Three-stage purification box 14, medium storage tank 15 and medium guide pump

16. Medium draft tube 17, three-stage draft pump 18 and three-stage draft tube

19. A filtering storage tank 20, a dredging valve 21 and a blow-off valve

22. Membrane filter 23, output valve

Detailed Description

The following provides a brief description of the embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the layered precipitation type water-oil separation and collection device is characterized in that: by support frame 1, injection nest of tubes 2, one-level settling tank 3, second grade adsorption tank 8, tertiary purification case 13, medium storage tank 14, filtration storage tank 19 and membrane filter 22 constitute, injection nest of tubes 2 is located the top of support frame 1, injection nest of tubes 2 is fixed connection with support frame 1, one-level settling tank 3 is located the position department that support frame 1 inboard is close to the top, one-level settling tank 3 is for dismantling the connection with support frame 1, still be equipped with filter screen 4 on one-level settling tank 3, purify layer 5, one-level guiding pump 6 and one-level honeycomb duct 7, filter screen 4 is located the position department that one-level settling tank 3 inboard is close to the top, filter screen 4 is for dismantling the connection with one-level settling tank 3, purify layer 5 and be located the inboard bottom of one-level settling tank 3, purify layer 5 and settling tank 3 for dismantling the connection, one-level guiding pump 6 is located one-level settling tank 3 one side, one-level guiding pump 6 is fixed connection with one-level settling tank 3, one-level guiding pump 7 is located between one-level settling tank 3 and second grade adsorption tank 8, one-level draft tank 7 is located the inboard 10, one-level draft tank 8 is connected with the adsorption tank 8, the adsorption tank 8 is connected with the second grade adsorption tank 8, the suction tank is connected with the second grade adsorption tank 10, the absorption tank is connected with the second grade adsorption tank 8, the absorption tank is inboard 10, the second grade adsorption tank is connected with the absorption tank 8, the absorption tank is connected with the second grade adsorption tank 10, the second-stage guide pump 11 is located on one side of the second-stage adsorption tank 8, the second-stage guide pump 11 is fixedly connected with the second-stage adsorption tank 8, the second-stage guide pipe 12 is located between the second-stage adsorption tank 8 and the third-stage purification tank 13, one end of the second-stage guide pipe 12 is fixedly connected with the second-stage guide pump 11, the third-stage purification tank 13 is located on the inner side of the support frame 1, the third-stage purification tank 13 is located on the lower portion of the second-stage adsorption tank 8, the third-stage purification tank 13 is detachably connected with the support frame 1, the medium storage tank 14 is located on the upper portion of the support frame 1, the medium storage tank 14 is fixedly connected with the support frame 1 by using bolts, the medium guide pump 15 and the medium guide pipe 16 are further arranged on the medium storage tank 14, the medium guide pump 15 is located on one side of the medium storage tank 14, the medium guide pump 15 is fixedly connected with the medium storage tank 14, the medium guide pipe 16 is located between the medium storage tank 14 and the third-stage purification tank 13, one end of the medium guide pipe 16 is fixedly connected with the medium guide pump 15, the third-stage purification tank 13 is further provided with the third-stage guide pump 17 and the third-stage purification tank 19, one end of the filtration guide pipe 19 is located on one side of the third-stage purification tank 19, one side of the filtration guide pipe 19, the filtration tank 19 is located on the third-filtration tank 19, the filtration guide pipe 19, the filtration tank 19 is located on one side of the third-filtration guide pipe 19, the third-filtration tank 19, the filtration tank 19 is located on the third-filtration guide pipe 19, the other end of the dredging valve 20 is fixedly connected with the three-level guide pipe 18, the blow-down valve 21 is positioned at the bottom of the filtering storage tank 19, the blow-down valve 21 is fixedly connected with the filtering storage tank 19, the membrane filter 22 is positioned at the next stage of the filtering storage tank 19, the membrane filter 22 is connected with the filtering storage tank 19 through a pipeline, the membrane filter 22 is further provided with an output valve 23, the output valve 23 is positioned at one side of the membrane filter 22, and the output valve 23 is fixedly connected with the membrane filter 22. The first-stage settling tank 3, the second-stage adsorption tank 8 and the third-stage purification tank 13 are all pull-type structure tank bodies with liquid level scales. The filter screen 4 is a fiber net or an asbestos net. The purification layer 5 is a stainless steel net with a multilayer staggered structure. The drain pan 9 is funnel-shaped. The adsorption layer 10 is a carbon fiber polymer mat. The media tank 14 is a liquid wood pulp cellulose tank. The filtering storage tank 19 is a multi-layer fiber net filtering tank. The dredging valve 20, the drain valve 21 and the output valve 23 are all screwed ball valves.

The working mode is as follows: the water-oil separation and collection device adopts a layered precipitation type structural design, and the whole set of facilities mainly comprises a support frame 1, an injection pipe group 2, a first-stage settling tank 3, a second-stage adsorption tank 8, a third-stage purification tank 13, a medium storage tank 14, a filtration storage tank 19 and a membrane filter 22, wherein the first-stage settling tank 3, the second-stage adsorption tank 8 and the third-stage purification tank 13 are sequentially arranged on the inner side of the support frame 1 in a layered structure from high to low and are used for screening and filtering oil-water mixed liquid step by step, and the first-stage settling tank 3, the second-stage adsorption tank 8 and the third-stage purification tank 13 all adopt pull type structural boxes with liquid level scales, so that the first-stage settling tank 3, the second-stage adsorption tank 8 and the third-stage purification tank are convenient to be detached and separated from the support frame 1 and subsequent maintenance and cleaning, and meanwhile, the liquid level in each box can be conveniently observed by workers; when in operation, firstly, the liquid needing to be subjected to water-oil separation enters the first-level settling tank 3 at the position close to the top inside the support frame 1 along the injection pipe group 2, the filter screen 4 is arranged at the position close to the top inside the first-level settling tank 3, the filter screen 4 adopts a fiber net or an asbestos net, impurities and particles in the water-oil liquid can be filtered, a primary filtering effect is achieved, the water-oil liquid filtered by the filter screen 4 forms a collecting pool inside the first-level settling tank 3, a worker needs to observe the liquid level scale on the first-level settling tank 3, once the liquid level reaches the limit value limited by the scale of the first-level settling tank 3, the water-oil liquid supply at the source is cut off, so that the injection pipe group 2 does not inject the water-oil liquid into the first-level settling tank 3 any more, and the water-oil liquid filtered by the first-level settling tank 3 through the filter screen 4 is allowed to stand for a period of time, because the density of oil is greater than water, make water deposit in the inferior part of fluid, in addition, still be equipped with one at the inboard bottom of one-level settling tank 3 and purify layer 5, this purify layer 5 adopts multilayer alternating structure stainless steel mesh, during the precipitation separation, the impurity that the quality is heavier in the water oil liquid can deposit in the bottom of one-level settling tank 3, and purify the alternating structure stainless steel mesh of layer 5, can play an adsorbed effect to these impurity, avoid drawing these impurity that the quality is heavier together when pumping water, be equipped with one-level flow guide pump 6 and one-level honeycomb duct 7 in one side of one-level settling tank 3, the separation condition after the water oil sedimentation can also be observed through the liquid level scale on one-level settling tank 3 to the staff, when the condition that water oil liquid separates presents obvious state, the staff can open one-level flow guide pump 6, the water in the first-stage sedimentation tank 3 is extracted and conveyed into a second-stage adsorption tank 8 along a first-stage diversion pipe 7, the water in the first-stage sedimentation tank 3 is continuously extracted along with a first-stage diversion pump 6, and the oil liquid state presented above the water is kept in the first-stage sedimentation tank 3 so as to be cleaned subsequently; then, the water precipitated and separated by the primary precipitation tank 3 falls from the upper part of the secondary adsorption tank 8, and at this time, some oil liquid still remains in the water, a leak tray 9 is installed at the top position of the inner side of the secondary adsorption tank 8, the leak tray 9 adopts a funnel-shaped structure, so that splashing around caused by the water output by the primary flow guide pipe 7 can be prevented, the water can be concentrated and fall along the central opening of the leak tray 9, an adsorption layer 10 is installed at the bottom of the inner side of the secondary adsorption tank 8, the adsorption layer 10 adopts a carbon fiber polymerization pad, carbon fibers of the adsorption layer can adsorb oil liquid substances in the water, the purity of the water is higher, a worker can also observe the liquid level by using the liquid level scale on the secondary adsorption tank 8, once the liquid level reaches the limit value limited by the scale of the secondary adsorption tank 8, the worker needs to start a secondary flow guide pump 11 installed at one side of the secondary adsorption tank 8 to extract the purified water adsorbed and flow into a tertiary purification tank 13 along the secondary flow guide pipe 12; a medium storage tank 14 is arranged at the upper part of the support frame 1, the medium storage tank 14 is a liquid wood pulp cellulose storage tank, the liquid wood pulp cellulose solution is arranged in the liquid wood pulp cellulose storage tank, then an operator opens a medium guide pump 15 at one side of the medium storage tank 14, under the action of the medium guide pump 15, the liquid wood pulp cellulose solution enters the three-stage purification box 13 along a medium guide pipe 16, meanwhile, water purified and filtered by the second-stage adsorption box 8 also enters the three-stage purification box 13 along a second-stage guide pipe 12, the water purified and filtered and the liquid wood pulp cellulose solution are mixed, the optimal proportion value is 5 to 1, water with the proportion of 5 is required to be mixed with the liquid wood pulp cellulose solution with the proportion of 1, the operator can carry out proportion allocation through a liquid level scale at one side of the three-stage purification box 13, and can release water in the operation process, then the liquid wood pulp cellulose solution is released, or vice versa, the mixed aqueous solution enters a filtering storage tank 19 along a three-level draft tube 18 under the action of a three-level guide pump 17 arranged on one side of a three-level purifying box 13, the filtering storage tank 19 adopts a multi-layer fiber net filtering tank, the mixed aqueous solution can be subjected to layer-by-layer osmotic filtration, a dredging valve 20 is arranged at the connecting position of the filtering storage tank 19 and the three-level draft tube 18, the dredging valve 20 adopts a screwing type spherical valve, the flow rate and the opening and closing operation of the mixed aqueous solution entering the filtering storage tank 19 can be controlled, water filtered by the multi-layer fiber net in the filtering storage tank 19 enters a membrane filter 22 along a pipeline, impurities and particles in the water can form accumulation at the bottom in the filtering storage tank 19, and a worker only needs to open a drain valve 21 to discharge the water, the blowoff valve 21 is also a screwed ball valve, which is convenient to open and close; finally, the water is filtered by the membrane filter 22 to achieve the purification purpose, an output valve 23 on one side of the membrane filter 22 is used for outputting the purified water after water and oil separation, and the output valve 23 also adopts a screwed ball valve, so that the on-off and the flow control are convenient; the structure thinking of the whole set of facility is clear, and easy operation is convenient, can realize precipitation separation, adsorption purification, fibre purification, and then accomplish the water-oil separation operation, has refined the purification flow to let the water-oil separation more thoroughly, improved the quality and the resource utilization ratio of water-oil separation, whole more green, be convenient for maintain.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", "end", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. The utility model provides a formula water oil separation collection device deposits in layering which characterized in that: comprises a support frame, an injection pipe group, a first-level sedimentation tank, a second-level adsorption tank, a third-level purification tank, a medium storage tank, a filtering storage tank and a membrane filter, wherein the injection pipe group is positioned at the top of the support frame, the injection pipe group is fixedly connected with the support frame, the first-level sedimentation tank is positioned at the position close to the top inside the support frame, the first-level sedimentation tank is detachably connected with the support frame, the first-level sedimentation tank is also provided with a filter screen, a purification layer, a first-level flow guide pump and a first-level flow guide pipe, the filter screen is positioned at the position close to the top inside the first-level sedimentation tank, the filter screen is detachably connected with the first-level sedimentation tank, the purification layer is positioned at the bottom inside the first-level sedimentation tank, the purification layer is detachably connected with the sedimentation tank, the first-level flow guide pump is positioned at one side of the first-level sedimentation tank, the first-level flow guide pump is fixedly connected with the first-level sedimentation tank, the first-stage guide pipe is positioned between the first-stage sedimentation tank and the second-stage adsorption tank, one end of the first-stage guide pipe is fixedly connected with the first-stage guide pump, the second-stage adsorption tank is positioned on the inner side of the support frame, the second-stage adsorption tank is positioned on the lower part of the first-stage sedimentation tank and is detachably connected with the support frame, the second-stage adsorption tank is also provided with a drain pan, an adsorption layer, a second-stage guide pump and a second-stage guide pipe, the drain pan is positioned on the inner side of the second-stage adsorption tank close to the top, the drain pan is detachably connected with the second-stage adsorption tank, the adsorption layer is positioned on the bottom of the inner side of the second-stage adsorption tank, the adsorption layer is detachably connected with the second-stage adsorption tank, the second-stage guide pump is positioned on one side of the second-stage adsorption tank and is fixedly connected with the second-stage adsorption tank, and the second-stage guide pipe is positioned between the second-stage adsorption tank and the third-stage purification tank, one end of the second-stage flow guide pipe is fixedly connected with the second-stage flow guide pump, the third-stage purification box is positioned on the inner side of the support frame, the third-stage purification box is positioned on the lower portion of the second-stage adsorption box and is detachably connected with the support frame, the medium storage tank is positioned on the upper portion of the support frame and is fixedly connected with the support frame by using bolts, the medium storage tank is also provided with a medium flow guide pump and a medium flow guide pipe, the medium flow guide pump is positioned on one side of the medium storage tank and is fixedly connected with the medium storage tank, the medium flow guide pipe is positioned between the medium storage tank and the third-stage purification box, one end of the medium flow guide pipe is fixedly connected with the medium flow guide pump, the third-stage purification box is also provided with a third-stage flow guide pump and a third-stage flow guide pipe, the third-stage flow guide pump is positioned on one side of the third-stage purification box and is fixedly connected with the third-stage purification box, the three-stage guide pipe is positioned between the three-stage purification box and the filtering storage tank, one end of the three-stage guide pipe is fixedly connected with the three-stage guide pump, the other end of the three-stage guide pipe is connected with the filtering storage tank, the filtering storage tank is positioned on one side of the support frame, the filtering storage tank is also provided with a dredging valve and a blow-down valve, the dredging valve is positioned at the position, close to the top, of one side of the filtering storage tank, one end of the dredging valve is fixedly connected with the filtering storage tank, the other end of the dredging valve is fixedly connected with the three-stage guide pipe, the blow-down valve is positioned at the bottom of the filtering storage tank, the blow-down valve is fixedly connected with the filtering storage tank, the membrane filter is positioned at the next stage of the filtering storage tank, the membrane filter is connected with the filtering storage tank by using a pipeline, the membrane filter is also provided with an output valve, and the output valve is positioned at one side of the membrane filter, the output valve is fixedly connected with the membrane filter.

2. The layered precipitation type water-oil separation and collection device according to claim 1, wherein: the first-stage settling tank, the second-stage adsorption tank and the third-stage purification tank are all pull-type structure tank bodies with liquid level scales.

3. The layered precipitation type water-oil separation and collection device according to claim 1, wherein: the filter screen is a fiber net or an asbestos net.

4. The layered precipitation type water-oil separation and collection device according to claim 1, wherein: the purification layer is a multilayer stainless steel net with a staggered structure.

5. The layered precipitation type water-oil separation and collection device according to claim 1, wherein: the drain pan is of a funnel-shaped structure.

6. The layered precipitation type water-oil separation and collection device according to claim 1, wherein: the adsorption layer is a carbon fiber polymer mat.

7. The layered precipitation type water-oil separation and collection device according to claim 1, wherein: the medium storage tank is a liquid wood pulp cellulose storage tank.

8. The layered precipitation type water-oil separation and collection device according to claim 1, wherein: the filtering storage tank is a multi-layer fiber net filtering tank.

9. The layered precipitation type water-oil separation and collection device according to claim 1, wherein: the guide valve, the blow-down valve and the output valve are all screwed ball valves.