Defoaming device for gas-liquid separation

Abstract

The present invention proposes a defoaming device for gas-liquid separation, comprising a head, wherein a steam outlet is arranged at the top center of the head, and the device is characterized in that it also comprises a cone shell, a support rod, a baffle and an annular pipe, wherein the cone shell opens downward, and the upper surface of the cone shell is fixedly connected to the inner wall of the head through the support rod, and the annular pipe is fixedly installed on the inner top of the head, one end of the baffle is fixedly connected to the annular pipe and arranged in an array along a circular direction, and the length directions of two adjacent baffles are parallel to each other, and one end of the baffle away from the annular pipe is fixedly connected to the upper surface of the cone shell, and a plurality of through holes are arranged in an array on a side of the annular pipe close to the baffle, and a side of the annular pipe away from the baffle is interconnected with the upper surface of the head. The present invention adopts two-layer defoaming, has good defoaming effect, and has a simple structure. It is also convenient to clean and maintain, and has good application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of chemical production equipment, in particular to a defoaming device for gas-liquid separation. Background Art

[0002] In the process of ammonium phosphate production, the monoammonium phosphate slurry from the ammoniation reactor needs to be concentrated by double-effect evaporation to make the water content of the slurry reach 22-25%, and then sent to the top of the powder spraying tower for powder spraying and drying through a pressure pump.

[0003] In this process, the heat source for the first-effect evaporation is low-pressure steam, and the heat source for the second-effect evaporation is the by-product secondary steam generated by the first-effect evaporation.

[0004] However, the generation of secondary steam is in the process of gas-liquid separation on the liquid surface of the first-effect evaporation chamber, so liquid film entrainment will occur. If defoaming treatment is not performed or the defoaming treatment is ineffective, the slurry in the first-effect evaporation chamber will be brought into the second-effect evaporation chamber. This will cause scaling of the heat exchange tubes of the second-effect heater in the long term. Increased dirt in the heat exchanger will reduce the heat exchange effect. In actual production, the heat exchange tubes need to be cleaned regularly. Frequent shutdowns for cleaning will affect the production process and reduce production efficiency. Summary of the invention

[0005] In view of this, the present invention proposes a defoaming device for gas-liquid separation which has better defoaming effect and can have a shorter cleaning cycle in actual production.

[0006] The technical solution of the present invention is achieved as follows: the present invention provides a defoamer for gas-liquid separation, which is used in liquid film separation equipment, mainly in liquid film separation reactor, and is fixedly installed on the inner surface of the head, and a steam outlet is arranged in the center of the top of the head. The defoamer includes a cone shell, a support rod, a baffle and an annular pipe. The cone shell is a conical shell, the opening of the cone shell faces downward, and the upper surface of the cone shell is fixedly connected to the inner wall of the head through the support rod. The annular pipe is fixedly installed on the inner top of the head, one end of the baffle is fixedly connected to the surface of the annular pipe and arranged in an array along the circular direction, the length directions of two adjacent baffles are parallel to each other, and the end of the baffle away from the annular pipe is fixedly connected to the upper surface of the cone shell, and a plurality of through holes are arranged in an array on the side of the annular pipe close to the baffle, and the side of the annular pipe away from the baffle is connected to the upper surface of the head.

[0007] In the above technical solution, the angle of the cone shell is 90 degrees.

[0008] On the basis of the above technical solution, preferably, the axes of the conical shell, the annular pipe and the head coincide with each other.

[0009] On the basis of the above technical solution, preferably, the length direction of the baffle is parallel to the axial direction of the head.

[0010] Based on the above technical solution, preferably, the baffle includes a first plate surface and a second plate surface fixedly connected, the connection between the first plate surface and the second plate surface is parallel to the length direction of the baffle, and the first plate surface and the second plate surface form an angle of 12 degrees.

[0011] More preferably, the angle formed by the first plate surface and the second plate surface opens toward the outside of the annular pipe, and two adjacent baffles do not contact each other.

[0012] Based on the above technical solution, preferably, the edge of the first plate surface of any baffle away from the second plate surface of the baffle is coplanar with the axis of the head, and the plane intersects with the second plate surface of an adjacent baffle close to the first plate surface.

[0013] On the basis of the above technical solution, preferably, it further comprises a connecting pipe, wherein the connecting pipe is fixedly mounted on the upper surface of the head, and the connecting pipe is communicated with the annular pipe.

[0014] Based on the above technical solution, preferably, the number of the connecting pipes is not less than two.

[0015] On the basis of the above technical solution, preferably, the number of the support rods is at least two, and the length direction of the support rods is parallel to the axis of the head.

[0016] On the basis of the above technical solution, preferably, the number of the support rods is six, and the support rods are arranged in a circular array on the inner surface of the head with the axis of the head as the axis.

[0017] The defoaming device for gas-liquid separation of the present invention has the following beneficial effects compared with the prior art:

[0018] (1) Based on the conventional demister, this solution uses baffles arranged in a circumferential array and annular pipes to cooperate with each other. After the first defoaming of the cone shell, the baffle plays a role of second defoaming, and the baffle is in the form of a baffle as a whole to further enhance the defoaming effect. This design can reduce the height of the defoaming equipment;

[0019] (2) The entire device adopts a method similar to a combination of a spherical demister and a baffle demister, which has a high defoaming efficiency. At the same time, corresponding through holes are provided on the annular pipe, and the surfaces of the baffle and the cone shell can be flushed with hot water and steam, thereby facilitating cleaning operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a side sectional view of the defoaming device of the present invention installed in the head;

[0022] Figure 2 A top view of the defoaming device of the present invention;

[0023] Figure 3 It is a side cross-sectional view of the annular pipeline in the defoaming device of the present invention installed on the head;

[0024] Figure 4 It is a cross-sectional view of the baffle in the defoaming device of the present invention.

[0025] In the figure: 1-head, 11-steam outlet, 2-conical shell, 3-support rod, 4-baffle, 41-first plate surface, 42-second plate surface, 5-annular pipe, 51-through hole, 6-connecting pipe. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1 As shown, combined Figure 2 The defoaming device used in the separation process of an enterprise of the present invention comprises a head 1, a steam outlet 11 is arranged at the top center of the head 1, and also comprises a cone shell 2, a support rod 3, a baffle 4 and an annular pipe 5. The opening of the cone shell 2 faces downward, and the upper surface of the cone shell 2 is fixedly connected to the inner wall of the head 1 through the support rod 3. The annular pipe 5 is fixedly installed on the inner top of the head 1, one end of the baffle 4 is fixedly connected to the side of the annular pipe 5 away from the head 1 and arranged in an array along the annular direction of the annular pipe 5, the length directions of two adjacent baffles 4 are parallel to each other and do not contact each other, one end of the baffle 4 away from the annular pipe 5 is fixedly connected to the upper surface of the cone shell 2, and a plurality of through holes 51 are arranged in an array on the side of the annular pipe 5 close to the baffle 4, and the side of the annular pipe 5 away from the baffle 4 is connected with the upper surface of the head 1.

[0028] In the above embodiment, the cone shell 2 serves as the first-layer demister, and the foam below will be blocked by the cone shell 2 first, and the unblocked foam will enter the steam outlet 11 through the baffle 4. The baffle 4 plays the role of the second-layer demister. A plurality of through holes 51 are provided on the annular pipe 5 to flush the baffle 4 below to avoid scaling.

[0029] In the above implementation manner, the height of the reactor that conventionally uses the conical shell 2 as the demister will be higher. Taking the evaporation chamber with a diameter of 4500mm as an example, the conventional equipment height needs to reach 9000mm to ensure the normal defoaming efficiency as much as possible. The structure of the present application can reduce the equipment height to 6000mm, and the defoaming effect is the same.

[0030] like Figure 3 As shown, in a specific implementation, the cross section of the annular pipe 5 is a quadrilateral, and one side of the principle head 1 is parallel to the horizontal plane.

[0031] In the above embodiment, the baffle 4 is more easily connected to the surface of the annular pipe 5. At the same time, when the annular pipe 5 is filled with flushing liquid, the water leakage of the through holes 51 located at different positions is relatively uniform, and the flushing effect is better.

[0032] At the same time, the cleaning cycle of the demister of the present application can be 60 days / time, while the conventional demister requires 20 days / time.

[0033] In a specific embodiment, the axes of the cone shell 2, the annular pipe 5 and the head 1 coincide with each other.

[0034] In the above implementation manner, the installation method of the coaxial line makes the structure more symmetrical, avoiding poor defoaming effect caused by asymmetrical design.

[0035] In a specific implementation, the length direction of the baffle 4 is parallel to the axial direction of the head 1 .

[0036] In the above embodiment, multiple baffles 4 form a grid structure with each other, which can play a deflection role, so that the foam can hit the baffle 4 to achieve the defoaming effect. The design parallel to the axial direction of the head 1 can also make the structure more symmetrical, avoiding the problem of poor local defoaming effect.

[0037] like Figure 4 As shown, in a specific embodiment, the baffle 4 includes a first plate surface 41 and a second plate surface 42 that are fixedly connected, the connection between the first plate surface 41 and the second plate surface 42 is parallel to the length direction of the baffle 4, and the first plate surface 41 and the second plate surface 42 form an angle of 120 degrees.

[0038] In the above embodiments, the first plate surface 41 and the second plate surface 42 which are angled with each other can play a baffle role, and a certain baffle channel can be formed between the two baffles, thereby enhancing the defoaming effect.

[0039] In a specific embodiment, the angle formed by the first plate surface 41 and the first plate surface 42 opens toward the outside of the annular pipe 5 .

[0040] In the above embodiment, the angled opening is directed toward the outside of the annular pipe 5 so that the resistance to entering the inner side of the folded plate 4 is greater, thereby improving the defoaming effect.

[0041] In a specific embodiment, the edge of the first plate surface 41 of any baffle 4 away from the second plate surface 42 of the baffle 4 is coplanar with the axis of the head 1, and the plane intersects with the second plate surface 42 of the adjacent baffle close to the first plate surface 41.

[0042] The above implementation is a more preferred embodiment. There is no direct gap between two adjacent baffles 4. The interlacing can form a certain channel structure, which can allow the airflow entering the inner circle of the baffle 4 to collide several times to achieve the purpose of defoaming.

[0043] In a specific embodiment, a connecting pipe 6 is further included. The connecting pipe 6 is fixedly installed on the upper surface of the head 1 , and the connecting pipe 6 is communicated with the annular channel 5 .

[0044] In the above embodiments, the connecting pipe 6 is used to communicate with the external pipeline and provide hot water or steam to the annular pipe 5 .

[0045] In a specific embodiment, the number of the connecting pipes 6 is not less than two.

[0046] In the above embodiments, at least two connecting pipes 6 can be used to connect the steam pipeline and the hot water pipeline respectively.

[0047] In a specific implementation, the number of the support rods 3 is at least two, and the length direction of the support rods 3 is parallel to the axial direction of the head 1 .

[0048] In the above embodiments, at least two support rods 3 can make the force on the cone shell 2 more uniform and achieve a better fixing effect.

[0049] In a specific implementation, the number of the support rods 3 is six, and the support rods 3 are arranged on the inner surface of the head 1 in a circular array with the axis of the head 1 as the axis center.

[0050] In the above embodiments, preferably, six support rods 3 arranged in an array are used, which has the best fixing effect.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A defoaming device for gas-liquid separation, comprising a sealing head (1), wherein a steam outlet (11) is provided at the top center of the sealing head (1), characterized in that: The invention also comprises a cone shell (2), a support rod (3), a baffle (4), an annular pipe (5) and a connecting pipe (6); the cone shell (2) is opened downward; the upper surface of the cone shell (2) is fixedly connected to the inner wall of the head (1) via the support rod (3); the number of the support rods (3) is six; the support rods (3) are arranged in a circular array on the inner surface of the head (1) with the axis of the head (1) as the axis; the length direction of the support rods (3) is parallel to the axis of the head (1); the annular pipe (5) is fixedly connected to the inner wall of the head (1) via the support rod (3); ... annular pipe (5) is fixedly connected to the inner wall of the head (1) via the support rod (3); the support rods (3) are arranged in a circular array on the inner surface of the head (1) with the axis of the head (1) as the axis; the support rods (3) are arranged in a circular array on the inner surface of the head (1) in a circular array; the support rods (3) are arranged in a circular array on the inner surface of the head (1) with the axis of the head (1) as the axis; the support rods (3) are arranged in a circular array on the inner surface of the head (1); the support rods (3) are arranged in a circular array on the inner surface of the head (1); the support rods (3) are arranged in a circular array on the inner surface of the head (1); the support rods (3) are arranged The conical shell (2), the annular pipe (5) and the head (1) are fixedly mounted on the top of the inner side of the head (1), and the axes of the conical shell (2), the annular pipe (5) and the head (1) are mutually coincident; one end of the baffle (4) is fixedly connected to the annular pipe (5) and arranged in an array along the direction of the ring; the length directions of two adjacent baffles (4) are mutually parallel; one end of the baffle (4) away from the annular pipe (5) is fixedly connected to the upper surface of the conical shell (2), and the length direction of the baffle (4) is mutually parallel in the opposite direction to the axis of the head (1); the annular pipe (5) is close to the baffle. A plurality of through holes (51) are arranged in an array on one side of the plate (4); a side of the annular pipe (5) away from the baffle plate (4) is in communication with the upper surface of the head (1); the connecting pipe (6) is fixedly mounted on the upper surface of the head (1); the connecting pipe (6) and the annular pipe (5) are in communication with each other; the number of the connecting pipes (6) is not less than two; the baffle plate (4) comprises a first plate surface (41) and a second plate surface (42) which are fixedly connected; the connection between the first plate surface (41) and the second plate surface (42) is in communication with the The length directions of the baffles (4) are parallel to each other, and the first plate surface (41) and the second plate surface (42) form an angle of 120 degrees; the angle formed by the first plate surface (41) and the second plate surface (42) opens toward the outside of the annular pipe (5); the edge of the first plate surface (41) of any baffle (4) away from the second plate surface (42) of the baffle (4) shares a plane with the axis of the head (1), and the shared plane intersects with the second plate surface (42) of an adjacent baffle close to the first plate surface (41).

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