Transfer equipment for chlorinated paraffin byproduct hydrochloric acid

Abstract

The utility model discloses chlorinated paraffin byproduct hydrochloric acid transfer equipment which comprises a transfer container used for receiving byproduct hydrochloric acid; the two ends of the transfer pipeline are connected with the transfer container and the conveying pump respectively; the conveying pump can pump out the byproduct hydrochloric acid in the transfer container through the transfer pipeline and convey the byproduct hydrochloric acid to target equipment or a process section; the transfer container is provided with a liquid level meter, the liquid level meter is used for detecting the liquid level of the byproduct hydrochloric acid in the transfer container, and the liquid level meter is electrically connected with the control system; and the control system is electrically connected with the conveying pump and used for controlling the conveying pump to start and stop. According to the chlorinated paraffin byproduct hydrochloric acid transfer equipment, the liquid level meter is matched with the control system to control the start and stop of the conveying pump, so that the byproduct hydrochloric acid in the transfer container is automatically pumped out, the hydrochloric acid production efficiency is high, the labor cost is reduced, and the chlorinated paraffin byproduct hydrochloric acid transfer equipment belongs to the technical field of chlorinated paraffin production processes.

Description

Technical Field

[0001] The utility model belongs to the technical field of chlorinated paraffin production processes, and particularly relates to a transfer device for by-product hydrochloric acid in chlorinated paraffin production. Background Art

[0002] During the production of chlorinated paraffin, a large amount of hydrogen chloride and a small amount of unreacted chlorine gas are generated. The hydrogen chloride and the small amount of unreacted chlorine gas are collected through a falling film absorption tower. Water is added to the falling film absorption tower to absorb hydrogen chloride to produce by-product hydrochloric acid, and then the by-product hydrochloric acid is collected through a transfer container. After the transfer container has collected a certain amount of by-product hydrochloric acid, the by-product hydrochloric acid is pumped into a large hydrochloric acid tank for storage by manually starting and stopping a transfer pump. Manually starting and stopping the transfer pump is an intermittent operation, which may cause acid leakage resulting in hydrochloric acid overflow, and may also cause the transfer container to be emptied and impurities to be pumped into the large hydrochloric acid tank. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a transfer device for by-product hydrochloric acid in chlorinated paraffin production, which solves the problems that in the prior art, the by-product hydrochloric acid is pumped into a large hydrochloric acid tank for storage by manually starting and stopping a transfer pump. Manually starting and stopping the transfer pump is an intermittent operation, which may cause acid leakage resulting in hydrochloric acid overflow, and may also cause the transfer container to be emptied and impurities to be pumped into the large hydrochloric acid tank.

[0004] The specific technical solution is as follows:

[0005] A transfer device for by-product hydrochloric acid in chlorinated paraffin production, comprising:

[0006] A transfer container for receiving by-product hydrochloric acid;

[0007] A transfer pipeline, with both ends of the transfer pipeline respectively connected to the transfer container and a transfer pump;

[0008] A transfer pump, which can pump out the by-product hydrochloric acid in the transfer container through the transfer pipeline and transport it to a target device or process section;

[0009] The transfer container is provided with a liquid level gauge for detecting the liquid level of the by-product hydrochloric acid in the transfer container. The liquid level gauge is electrically connected to a control system;

[0010] A control system, which is electrically connected to the transfer pump to control the start and stop of the transfer pump..

[0011] Preferably, the transfer device for by-product hydrochloric acid in chlorinated paraffin production further includes a separation component for receiving the by-product hydrochloric acid transported by the falling film absorption tower. The separation component can separate the wax oil and chlorine gas in the by-product hydrochloric acid, and the separation component is connected to the transfer container to transport the by-product hydrochloric acid to the transfer container.

[0012] Preferably, the separation component includes a primary separation and refining tank and a secondary separation and refining tank. The primary separation and refining tank is used to receive the by-product hydrochloric acid transported from the falling film absorption tower. The primary separation and refining tank can separate the wax oil and chlorine gas in the by-product hydrochloric acid. The secondary separation and refining tank is connected to the primary separation and refining tank to receive the by-product hydrochloric acid transported from the primary separation and refining tank. The secondary separation and refining tank can separate the wax oil and chlorine gas in the by-product hydrochloric acid. The secondary separation and refining tank is connected to the transfer container to transport the by-product hydrochloric acid to the transfer container.

[0013] Preferably, a first porous floating partition is placed in the primary separation and refining tank. The specific gravity of the first porous floating partition is between that of the wax oil and hydrochloric acid. The primary separation and refining tank is connected to a first air pipeline, and the first air pipeline is connected to a gas source supply unit.

[0014] Preferably, a second porous floating partition is placed in the secondary separation and refining tank. The specific gravity of the second porous floating partition is between that of the wax oil and hydrochloric acid. The secondary separation and refining tank is connected to a second air pipeline, and the second air pipeline is connected to a gas source supply unit.

[0015] Preferably, a wax oil recovery container is further included, and the wax oil recovery container is respectively connected to the primary separation and refining tank and the secondary separation and refining tank.

[0016] Preferably, the transfer container, the primary separation and refining tank, and the secondary separation and refining tank are all provided with sewage outlets.

[0017] Preferably, the transfer container, the primary separation and refining tank, and the secondary separation and refining tank are all connected to a gas phase pipe, and the gas phase pipe is used to connect to an external tail gas treatment device.

[0018] Preferably, the primary separation and refining tank and the secondary separation and refining tank are connected by an overflow pipe, and the secondary separation and refining tank and the transfer container are connected by an overflow pipe. The overflow pipe is bent, and the relative height at the bent part of the overflow pipe is higher than other parts of the overflow pipe.

[0019] Compared with the existing technology, the present utility model has the following beneficial effects:

[0020] 1. The hydrochloric acid transfer equipment for the by-product of chlorinated paraffin in the present utility model uses a liquid level gauge to cooperate with a control system to control the start and stop of the transfer pump, thereby realizing the automatic extraction of the by-product hydrochloric acid in the transfer container. The hydrochloric acid production efficiency is high, and the labor cost is reduced. It solves the problems of the existing method of manually starting and stopping the transfer pump to pump the by-product hydrochloric acid into the large hydrochloric acid tank for storage. Manually starting and stopping the transfer pump is an intermittent operation, which may cause leakage of acid pumping resulting in hydrochloric acid overflow, and may also cause the transfer container to be emptied and impurities to be pumped into the large hydrochloric acid tank.

[0021] 2. The hydrochloric acid transfer equipment for the by-product of chlorinated paraffin in the present utility model uses a separation component to separate the wax oil and chlorine gas in the by-product hydrochloric acid, improving the quality of the by-product hydrochloric acid. Description of the Drawings

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for the description of the embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0023] Figure 1 It is a schematic diagram of a transfer device for by-product hydrochloric acid of chlorinated paraffin.

[0024] Figure 2 It is a schematic diagram of a transfer device for by-product hydrochloric acid of chlorinated paraffin including a separation component.

[0025] Among them, 1 is a transfer container, 2 is a transfer pump, 3 is a transfer pipeline, 4 is a control system, 5 is a wax oil recovery container, 6 is a primary separation and refining tank, 7 is a secondary separation and refining tank, 8 is a gas pipe, 9 is a first air pipeline, 10 is an overflow pipe, 11 is a sewage outlet, 12 is an oil drain port, and 13 is a second air pipeline. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top part", "bottom part", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0028] In the description of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If the terms "first", "second", "third" are described only for the purpose of description and for distinguishing technical features, they should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0029] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", "linkage", and "setting" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The embodiments of the present utility model will be described below according to its overall structure.

[0030] As Figure 1 shown, a hydrochloric acid transfer device for by-products of chlorinated paraffin provided in this embodiment includes:

[0031] A transfer container 1 for receiving by-product hydrochloric acid; specifically, the transfer container 1 is made of acid-resistant and corrosion-resistant fiberglass material, and the transfer container 1 can be a container with a cylindrical or cubic structure; the transfer container 1 can be used to directly receive the by-product hydrochloric acid transported from the falling film absorption tower or to receive the by-product hydrochloric acid after the wax oil and chlorine are separated by the separation component.

[0032] A transfer pipeline 3, with both ends of the transfer pipeline 3 respectively connected to the transfer container 1 and the delivery pump 2; to achieve the smooth transfer of by-product hydrochloric acid, the transfer pipeline 3 can be made of polytetrafluoroethylene (PTFE) bellows, PVC, CPVC pipeline, PE composite pipe, FRP / PVC composite pipe, etc. It should be noted that solenoid valves and flow meters can be provided on the transfer pipeline 3, and the solenoid valves and flow meters are electrically connected to the control system. The opening degree of the transfer pipeline 3 is controlled by the solenoid valve, and the flow rate of by-product hydrochloric acid is detected by the flow meter, which is convenient for improving the accuracy of the control system in transporting by-product hydrochloric acid.

[0033] A delivery pump 2, which can pump out the by-product hydrochloric acid in the transfer container 1 through the transfer pipeline 3 and transport it to the target equipment or process section. For example, the delivery pump 2 transports the by-product hydrochloric acid in the transfer container 1 to the large hydrochloric acid tank for storage through the transfer pipeline 3;

[0034] The transfer container 1 is provided with a liquid level gauge, which is used to detect the liquid level of by-product hydrochloric acid in the transfer container 1. The liquid level gauge is electrically connected to the control system 4. Specifically, the liquid level gauge is a differential pressure liquid level gauge. The liquid level of by-product hydrochloric acid in the transfer container 1 is detected by the liquid level gauge, and the liquid level information is transmitted to the control system 4. The control system 4 compares the liquid level data detected by the liquid level gauge with the preset liquid level set value according to the preset liquid level set value. If it is greater than the preset liquid level set value, the control system 4 controls the transfer pump 2 to start, and transfers the by-product hydrochloric acid in the transfer container 1 to the hydrochloric acid storage tank for storage. Otherwise, the transfer pump 2 is closed, which does not require manual operation, improves the intrinsic safety of the equipment, and saves labor costs at the same time. Thus, the by-product hydrochloric acid in the transfer container 1 can be automatically and efficiently pumped out, solving the problems that the transfer pump 2 is manually started and stopped to pump the by-product hydrochloric acid into the hydrochloric acid storage tank. The manual start and stop of the transfer pump 2 is an intermittent operation, which may cause acid leakage and hydrochloric acid overflow, and may also cause the transfer container 1 to be emptied and impurities to be pumped into the hydrochloric acid storage tank.

[0035] The control system 4 is electrically connected to the transfer pump 2 to control the start and stop of the transfer pump 2.

[0036] It should be noted that the control system 4 is an existing controller. For example, the control system 4 is a distributed control system. The distributed control system (DCS) is used to monitor and control various process flows and equipment, and the centralized control function is dispersed to multiple devices and different control and monitoring points.

[0037] As Figure 2 shown, in some embodiments, the chlorinated paraffin by-product hydrochloric acid transfer equipment further includes a separation component. The separation component is used to receive the by-product hydrochloric acid transported from the falling film absorption tower. The separation component can separate the wax oil and chlorine gas in the by-product hydrochloric acid. The separation component is connected to the transfer container 1 to transport the by-product hydrochloric acid to the transfer container 1. Specifically, the separation component includes a primary separation and refining tank 6 and a secondary separation and refining tank 7. The primary separation and refining tank 6 is used to receive the by-product hydrochloric acid transported from the falling film absorption tower. The primary separation and refining tank 6 can separate the wax oil and chlorine gas in the by-product hydrochloric acid. The secondary separation and refining tank 7 is connected to the primary separation and refining tank 6 to receive the by-product hydrochloric acid transported from the primary separation and refining tank 6. The secondary separation and refining tank 7 can separate the wax oil and chlorine gas in the by-product hydrochloric acid. The secondary separation and refining tank 7 is connected to the transfer container 1 to transport the by-product hydrochloric acid to the transfer container 1.

[0038] Specifically, a first porous floating partition is placed in the primary separation and refining tank 6. The specific gravity of the first porous floating partition is between that of the wax oil and hydrochloric acid. The primary separation and refining tank 6 is connected to a first air pipeline 9, and the first air pipeline 9 is connected to a gas source supply unit.

[0039] It should be noted that the by-product hydrochloric acid from the falling film absorption tower enters the first-stage separation and purification tank 6 through the by-product hydrochloric acid inlet pipe, and is separated by the different specific gravities of the wax oil and hydrochloric acid. The first-stage separation and purification tank 6 is internally provided with a first porous floating partition board, and the specific gravity of the first porous floating partition board is between that of the wax oil and hydrochloric acid. The hydrochloric acid with a higher specific gravity is under the floating board, and the wax oil with a lower specific gravity floats on the first porous floating partition board. The wax oil enters the wax oil recovery container 5 through the oil discharge port 12. At the same time, a compressed air pipe is led to the bottom of the first-stage separation and purification tank 6, and by using the characteristic that chlorine is hardly soluble in water, the free chlorine in the hydrochloric acid is blown off and separated by air. The treated hydrochloric acid enters the second-stage separation and purification tank 7 through the overflow pipe 10.

[0040] Specifically, a second porous floating partition board is placed in the second-stage separation and purification tank 7, and the specific gravity of the second porous floating partition board is between that of the wax oil and hydrochloric acid; the second-stage separation and purification tank 7 is connected with a second air pipeline 13, and the second air pipeline 13 is connected with an air source supply unit. The second-stage separation and purification tank 7 is actually the same as the first-stage separation and purification tank 6 in structure, and the principle of separating the wax oil and chlorine in the by-product hydrochloric acid is the same, so it will not be elaborated here too much.

[0041] It should be noted that the air source supply unit can supply air to the first air pipeline 9 and the second air pipeline 13 through an existing air extraction pump.

[0042] It should be noted that the first-stage separation and purification tank 6 is provided with a by-product hydrochloric acid inlet nozzle. After the hydrogen chloride gas is made into 31% concentration by-product hydrochloric acid through the falling film absorption tower, it enters the first-stage separation and purification tank 6 through the by-product hydrochloric acid inlet pipe connecting to the by-product hydrochloric acid inlet nozzle.

[0043] It should be noted that the first air pipeline 9 and the second air pipeline 13 lead compressed air to the middle and lower parts of the first-stage separation and purification tank 6 and the second-stage separation and purification tank 7, and the free chlorine in the by-product hydrochloric acid is blown off and separated by air.

[0044] It should be noted that the first-stage separation and purification tank 6 and the second-stage separation and purification tank 7 are cylindrical containers.

[0045] It should be noted that by setting a separation component to separate and remove impurities from the by-product hydrochloric acid transported by the falling film absorption tower, the wax oil and chlorine in the by-product hydrochloric acid are separated, improving the quality of the by-product hydrochloric acid.

[0046] Specifically, the transfer container 1, the first-stage separation and purification tank 6, and the second-stage separation and purification tank 7 are all provided with sewage discharge ports 11. By setting the sewage discharge ports 11, the impurities at the bottoms of the transfer container 1, the first-stage separation and purification tank 6, and the second-stage separation and purification tank 7 can be removed and cleaned.

[0047] Specifically, the transfer container 1, the wax oil recovery container 5, the primary separation and refining tank 6, and the secondary separation and refining tank 7 are all connected with a gas phase pipe 8, and the gas phase pipe 8 is used to connect to an external tail gas treatment device. The tail gas treatment device can be an absorption tower, which is the most common chlorine tail gas treatment device. By transporting the chlorine waste gas into the absorption tower and making it contact with the alkali solution, the chlorine can be absorbed. By setting the gas phase pipe 8, the gas phase in the transfer container 1, the wax oil recovery container 5, the primary separation and refining tank 6, and the secondary separation and refining tank 7 is balanced.

[0048] Specifically, the primary separation and refining tank 6 and the secondary separation and refining tank 7 are connected through an overflow pipe 10, and the secondary separation and refining tank 7 and the transfer container 1 are connected through the overflow pipe 10. The overflow pipe 10 is bent, and the relative height of the bent part of the overflow pipe 10 is higher than other parts of the overflow pipe 10. Exemplarily, for the overflow pipe 10 connecting the primary separation and refining tank 6 and the secondary separation and refining tank 7, one end is connected to the bottom side wall of the secondary separation and refining tank 7, and the other end is connected to the middle part of the primary separation and refining tank 6; for the overflow pipe 10 connecting the secondary separation and refining tank 7 and the transfer container 1, one end is connected to the middle part of the secondary separation and refining tank 7, and the other end is connected to the bottom of the transfer container 1; the entire overflow pipe 10 is bent into a U shape, and then the bent part is set at the highest point, that is, the overflow pipe 10 is designed in an inverted U shape, so that only the by-product hydrochloric acid in the middle part between the primary separation and refining tank 6 and the secondary separation and refining tank 7 can overflow, and the wax oil and bottom impurities at the top of the primary separation and refining tank 6 and the secondary separation and refining tank 7 cannot flow into the next-stage tank (transfer container 1 and secondary separation and refining tank 7).

[0049] In some embodiments, the chlorinated paraffin by-product hydrochloric acid transfer device further includes a wax oil recovery container 5, and the wax oil recovery container 5 is respectively connected to the primary separation and refining tank 6 and the secondary separation and refining tank 7. The wax oil recovery container 5 can adopt an existing iron sheet barrel. The wax oil recovery container 5 is used to store the wax oil transported from the primary separation and refining tank 6 and the secondary separation and refining tank 7. After collecting a certain amount, through oleic acid separation treatment, the wax oil is recovered and used in the reaction kettle to reduce production consumption.

[0050] It should be noted that the primary separation and refining tank 6 and the secondary separation and refining tank 7 are both provided with oil discharge ports 12, and the wax oil recovery container 5 is connected to the oil discharge ports 12 through pipelines. Since the density of wax oil is lighter than that of hydrochloric acid, by controlling the liquid level of the by-product hydrochloric acid in the corresponding container with the control system 4 in cooperation with the liquid level gauge, the wax oil can flow into the wax oil storage tank through the oil discharge ports 12. The oil discharge ports 12 are equipped with glass sight glasses to observe the oil discharge situation.

[0051] It should be noted that the transfer container 1 can also be provided with an oil discharge port 12 as a backup. This oil discharge port is also connected to the wax oil recovery container 5 to prevent the by-product hydrochloric acid transported from the secondary separation and refining tank 7 to the transfer container 1 from still containing residual wax oil. Thus, the oil discharge port of the transfer container 1 can discharge the residual wax oil from the oil discharge port 12 to the wax oil recovery container 5.

[0052] It should be noted that the control system 4 can also be connected to a leakage alarm device to ensure the safety and stability of the transfer process of the by-product hydrochloric acid. The control system can also be connected to a toxic gas probe, such as an electrochemical sensor, to determine the presence and concentration of the gas by detecting the current signal generated when the toxic gas undergoes a chemical reaction on the surface of the electrode.

[0053] The foregoing description of the specific exemplary embodiments of the present invention is for purposes of illustration and exemplification. These descriptions are not intended to limit the present invention to the precise forms disclosed, and obviously, many changes and variations are possible in light of the above teachings. Although the embodiments of the present invention have been shown and described, the specific embodiments are merely interpretations of the present invention and not limitations thereof. The specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles and practical applications of the present invention, so that those skilled in the art can, after reading this specification, make modifications, substitutions, variations, and various different selections and changes that do not make a creative contribution to the embodiments as needed, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A chlorinated paraffin by-product hydrochloric acid transfer equipment, characterized in that: include: Transfer container for receiving by-product hydrochloric acid; A transfer pipeline, both ends of which are connected to the transfer container and the delivery pump respectively; A delivery pump, which can extract the by-product hydrochloric acid in the transfer container through the transfer pipeline and transport it to the target equipment or process section; The transfer container is provided with a liquid level meter, which is used to detect the liquid level of by-product hydrochloric acid in the transfer container, and the liquid level meter is electrically connected to the control system; A control system, the control system is electrically connected to the delivery pump to control the start and stop of the delivery pump; It also includes a separation component, which is used to receive the by-product hydrochloric acid transported by the falling film absorption tower. The separation component can separate wax oil and chlorine gas in the by-product hydrochloric acid. The separation component is connected to the transfer container to transport the by-product hydrochloric acid to the transfer container.

2. A chlorinated paraffin by-product hydrochloric acid transfer equipment according to claim 1, characterized in that: The separation component includes a primary separation and refining tank and a secondary separation and refining tank. The primary separation and refining tank is used to receive the by-product hydrochloric acid transported by the falling film absorption tower. The primary separation and refining tank can separate wax oil and chlorine gas from the by-product hydrochloric acid. The secondary separation and refining tank is connected to the primary separation and refining tank to receive the by-product hydrochloric acid transported by the primary separation and refining tank. The secondary separation and refining tank can separate wax oil and chlorine gas from the by-product hydrochloric acid. The secondary separation and refining tank is connected to the transfer container to transport the by-product hydrochloric acid to the transfer container.

3. A chlorinated paraffin by-product hydrochloric acid transfer equipment according to claim 2, characterized in that: A first porous floating baffle is placed in the primary separation and refining tank, and the specific gravity of the first porous floating baffle is between wax oil and hydrochloric acid; the primary separation and refining tank is connected to a first air pipeline, and the first air pipeline is connected to an air source supply unit.

4. A chlorinated paraffin by-product hydrochloric acid transfer equipment according to claim 2, characterized in that: A second porous floating baffle is placed in the secondary separation and refining tank, and the specific gravity of the second porous floating baffle is between wax oil and hydrochloric acid; the secondary separation and refining tank is connected to a second air pipeline, and the second air pipeline is connected to an air source supply unit.

5. A chlorinated paraffin by-product hydrochloric acid transfer equipment according to claim 2, characterized in that: It also includes a wax oil recovery container, which is connected to the primary separation and refining tank and the secondary separation and refining tank respectively.

6. A chlorinated paraffin by-product hydrochloric acid transfer equipment according to claim 2, characterized in that: The transfer container, the primary separation and refining tank and the secondary separation and refining tank are all provided with sewage outlets.

7. A chlorinated paraffin by-product hydrochloric acid transfer equipment according to claim 2, characterized in that: The transfer container, the primary separation and refining tank and the secondary separation and refining tank are all connected with a gas phase pipe, and the gas phase pipe is used to connect to an external tail gas treatment device.

8. A chlorinated paraffin by-product hydrochloric acid transfer equipment according to claim 2, characterized in that: The primary separation and refining tank and the secondary separation and refining tank are connected through an overflow pipe, and the secondary separation and refining tank and the transfer container are connected through an overflow pipe. The overflow pipe is bent, and the relative height of the bend of the overflow pipe is higher than other parts of the overflow pipe.

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