CN219252190U

CN219252190U - Automatic control device for sodium hypochlorite of acetylene cleaning system

Info

Publication number: CN219252190U
Application number: CN202223364041.8U
Authority: CN
Inventors: 杨友信; 黄富铭; 王成; 郝淑丽; 曹潭洲; 阳天海; 施建康; 李明; 武少峰; 刘涛; 张晓兴
Original assignee: Tianneng Chemical Co ltd; Xinjiang Tianye Group Co Ltd
Current assignee: Tianneng Chemical Co ltd; Xinjiang Tianye Group Co Ltd
Priority date: 2022-12-14
Filing date: 2022-12-14
Publication date: 2023-06-27
Anticipated expiration: 2032-12-14

Abstract

The utility model discloses an automatic control device for sodium hypochlorite of an acetylene cleaning system, which comprises a No. 1 cleaning tower and a No. 2 cleaning tower, wherein an acetylene gas feeding pipeline is arranged at the lower part of the No. 1 cleaning tower, an acetylene gas discharging pipeline is arranged at the top of the No. 2 cleaning tower, a sodium hypochlorite feeding pipeline I is arranged at the upper part of the No. 2 cleaning tower, a sodium hypochlorite feeding pipeline II is arranged at the bottom of the No. 2 cleaning tower and the upper part of the No. 1 cleaning tower, an acetylene gas flowmeter is arranged on the acetylene gas discharging pipeline, a No. 1 flowmeter and a No. 1 valve are arranged on the sodium hypochlorite feeding pipeline I, and a No. 2 flowmeter and a No. 2 valve are arranged on the sodium hypochlorite feeding pipeline II. Compared with the prior art, the method solves the problems of low manual control operation precision, frequent times and high times of detecting the content of the available chlorine when the cleaning tower is supplemented with sodium hypochlorite.

Description

Automatic control device for sodium hypochlorite of acetylene cleaning system

Technical Field

The utility model relates to automatic control of an acetylene cleaning system, in particular to an automatic control device of sodium hypochlorite of the acetylene cleaning system, and belongs to the technical field of automatic control of chemical production.

Background

The acetylene gas produced by the acetylene production process of the polyvinyl chloride calcium carbide method contains sulfur, phosphorus and other impurities, the generation of the impurities is caused by carrying raw material limestone for producing calcium carbide, sulfur and phosphorus impurities can corrode a carbon steel pipeline, so that catalyst poisoning in a converter in a synthesis process is invalid, the operation period of the catalyst is shortened, and the production cost and solid waste are increased. The method for removing sulfur, phosphorus and other impurities mainly utilizes the oxidizing property of sodium hypochlorite, and acetylene gas and fresh sodium hypochlorite reversely contact on the surface of a cleaning tower filler to generate oxidation reaction, so that sulfur, phosphorus impurities carried by the acetylene gas are removed.

At present, the degree of automation of the supplementing operation of the fresh sodium hypochlorite of the cleaning tower is lower, the supplementing control of the fresh sodium hypochlorite adopts manual operation, and the operation process is as follows: an operator takes fresh sodium hypochlorite in a fresh sodium hypochlorite configuration tank to conduct titration analysis, the effective chlorine content of the fresh sodium hypochlorite is analyzed, a fresh sodium hypochlorite supplementing manual valve is opened, the effective chlorine content of the primary cleaning tower is measured, the quality of acetylene gas is measured, the fresh sodium hypochlorite supplementing manual valve is adjusted according to the detection result, the effective chlorine content of the primary cleaning tower is measured again, the quality of the acetylene gas is measured, and the fresh sodium hypochlorite supplementing manual valve is operated repeatedly until the effective chlorine content of the primary cleaning tower reaches the standard, and the quality of the acetylene gas is qualified.

The manual operation is greatly influenced by personal experiences of operators, the consumption of fresh sodium hypochlorite is high due to repeated detection, the use amount of the standard solution is large, more waste liquid is generated, and the labor intensity of operators is high.

Disclosure of Invention

The utility model aims to solve the problems of low manual control operation precision, frequent times and high times of detecting the content of available chlorine of the sodium hypochlorite supplement of a cleaning tower, and provides an automatic control device for the sodium hypochlorite of an acetylene cleaning system.

In order to achieve the above object, the present utility model provides the following technical solutions:

the utility model provides an automatic controlling means of acetylene cleaning system sodium hypochlorite, includes No. 1 cleaning tower (1) and No. 2 cleaning tower (2), the lower part of No. 1 cleaning tower (1) is equipped with acetylene gas feed line (13), the top of No. 2 cleaning tower (2) is equipped with acetylene gas ejection of compact pipeline (14), the upper portion of No. 2 cleaning tower (2) is equipped with sodium hypochlorite feed line I (11), the bottom of No. 2 cleaning tower (2) and the upper portion of No. 1 cleaning tower (1) are equipped with sodium hypochlorite feed line II (12), be equipped with acetylene gas flowmeter (4) on acetylene gas ejection of compact pipeline (14), be equipped with No. 1 flowmeter (5) and No. 1 valve (6) on sodium hypochlorite feed line I (11), be equipped with No. 2 flowmeter (7) and No. 2 valve (8) on sodium hypochlorite feed line II (12).

Further, a waste sodium hypochlorite pipeline (15) is arranged at the bottom of the No. 1 cleaning tower (1), and a No. 3 flowmeter (9) and a No. 3 valve (10) are arranged on the waste sodium hypochlorite pipeline (15).

Further, a desolventizer (25), a liquid seal tank (24) and a stripping tower (26) are sequentially arranged between the waste sodium hypochlorite pipeline (15) and the water inlet pipeline (18).

Still further, still include blender (17), the bottom and the sodium hypochlorite feed line I (11) UNICOM of blender (17), the top of blender (17) is equipped with dense sodium hypochlorite pipeline (21) and water inlet line (18) respectively, be equipped with No. 5 flowmeter (22) and No. 5 valve (23) on dense sodium hypochlorite pipeline (21), be equipped with No. 4 flowmeter (19) and No. 4 valve (20) on water inlet line (18).

Further, a sodium hypochlorite configuration groove (3) and a high-level groove (16) are arranged between the mixer (17) and the sodium hypochlorite feeding pipeline I (11).

Preferably, the mixer (17) is a venturi.

Further, the signal ends of the flowmeter and the valve are connected with the DCS control system.

Compared with the prior art, the method has the advantages that the control precision of the cleaning tower when the sodium hypochlorite is supplemented is effectively improved by automatically controlling the acetylene flow and the sodium hypochlorite flow, so that the consumption of the sodium hypochlorite is reduced, the operation times are reduced by 40-50%, the titration analysis times of the effective chlorine of the sodium hypochlorite are reduced from 3-4 times to 1 time, and the labor intensity of operators is reduced.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

the figure shows: the device is characterized in that the device comprises a 1 # cleaning tower, a 2 # cleaning tower, a 3 # sodium hypochlorite configuration groove, a 4 # acetylene gas flowmeter, a 5 # 1 flowmeter, a 6 # 1 valve, a 7 # 2 flowmeter, a 8 # 2 valve, a 9 # 3 flowmeter, a 10 # 3 valve, a 11 # sodium hypochlorite feeding pipeline I, a 12 # sodium hypochlorite feeding pipeline II, a 13 # acetylene gas feeding pipeline, a 14 # acetylene gas discharging pipeline, a 15 # waste sodium hypochlorite pipeline, a 16 # elevated tank, a 17 # mixer, a 18 # water inlet pipeline, a 19 # 4 flowmeter, a 20 # 4 valve, a 21 # concentrated sodium hypochlorite pipeline, a 22 # 5 flowmeter, a 23 # 5 valve, a 24 # liquid seal tank, a 25 # desorber and a 26 # stripping tower.

Detailed Description

The present utility model is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present utility model.

Preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Example 1: referring to fig. 1, the automatic control device of the sodium hypochlorite of the acetylene cleaning system comprises a No. 1 cleaning tower (1) and a No. 2 cleaning tower (2), an acetylene gas feeding pipeline (13) is arranged at the lower part of the No. 1 cleaning tower (1), an acetylene gas discharging pipeline (14) is arranged at the top of the No. 2 cleaning tower (2), a sodium hypochlorite feeding pipeline I (11) is arranged at the upper part of the No. 2 cleaning tower (2), a sodium hypochlorite feeding pipeline II (12) is arranged at the bottom of the No. 2 cleaning tower (2) and the upper part of the No. 1 cleaning tower (1), an acetylene gas flowmeter (4) is arranged on the acetylene gas discharging pipeline (14), a No. 1 flowmeter (5) and a No. 1 valve (6) are arranged on the sodium hypochlorite feeding pipeline I (11), a No. 2 flowmeter (7) and a No. 2 valve (8) are arranged on the sodium hypochlorite feeding pipeline II (12), and the flow ratio of the acetylene gas metered by the acetylene gas flowmeter (4) to the sodium hypochlorite metered by the sodium hypochlorite flowmeter (5) is 100). 9.5 to 10.5.

The bottom of No. 1 cleaning tower (1) is equipped with useless sodium hypochlorite pipeline (15), be equipped with No. 3 flowmeter (9) and No. 3 valve (10) on useless sodium hypochlorite pipeline (15), be equipped with in proper order between useless sodium hypochlorite pipeline (15) and water inlet pipeline (18) and take off ware (25), liquid seal jar (24) and stripping tower (26).

Example 2: referring to fig. 1, compared with embodiment 1, the difference in this embodiment is that the device further comprises a mixer (17), the bottom of the mixer (17) is communicated with a sodium hypochlorite feeding pipeline i (11), a concentrated sodium hypochlorite pipeline (21) and a water inlet pipeline (18) are respectively arranged at the top of the mixer (17), a number 5 flowmeter (22) and a number 5 valve (23) are arranged on the concentrated sodium hypochlorite pipeline (21), and a number 4 flowmeter (19) and a number 4 valve (20) are arranged on the water inlet pipeline (18).

A sodium hypochlorite configuration groove (3) and an elevated tank (16) are also arranged between the mixer (17) and the sodium hypochlorite feeding pipeline I (11); the mixer (17) is a venturi, the venturi uniformly mixes the concentrated sodium hypochlorite and water which enter the venturi through a concentrated sodium hypochlorite pipeline (21) and a water inlet pipeline (18) to prepare fresh sodium hypochlorite, the fresh sodium hypochlorite enters a sodium hypochlorite preparation tank (3), and the fresh sodium hypochlorite is sent to a high-level tank (16) by a sodium hypochlorite preparation pump; tap water or recycled wastewater can be introduced into the water inlet pipeline (18) to adjust the concentration of sodium hypochlorite, and resources can be fully saved and cost can be reduced by utilizing the recycled wastewater.

The process flow comprises the following steps: acetylene gas is pressurized by a compressor, then passes through an acetylene gas feeding pipeline (13) arranged at the lower part of a No. 1 cleaning tower (1) and a No. 2 cleaning tower (2) in sequence, and enters a neutralization tower to neutralize acidic substances after reversely contacting sodium hypochlorite in the two cleaning towers to remove impurity gases, and then enters an acetylene gas discharging pipeline (14) arranged at the top of the No. 2 cleaning tower (2) to neutralize acidic substances, and the qualified acetylene gas after low-temperature dehydration is sent to the next procedure. Fresh sodium hypochlorite firstly enters the acetylene gas after the reaction of the No. 2 cleaning tower (2) and the No. 1 cleaning tower (1) from a sodium hypochlorite feeding pipeline I (11) arranged on the upper part of the No. 2 cleaning tower (2), then is introduced into the No. 1 cleaning tower (1), is contacted with the acetylene gas after being pressurized by a compressor, the generated waste sodium hypochlorite flows out of a waste sodium hypochlorite pipeline (15) at the bottom of the No. 1 cleaning tower (1) and is matched with concentrated sodium hypochlorite after being subjected to desorption treatment to prepare fresh sodium hypochlorite for purifying the acetylene gas in a venturi, the prepared sodium hypochlorite enters a sodium hypochlorite preparation tank, is pumped to a sodium hypochlorite high-level tank by sodium hypochlorite preparation, is pressurized by a pump from the bottom of the high-level tank to be fed into the No. 2 cleaning tower (2) through the sodium hypochlorite feeding pipeline I (11), enters the No. 1 through a sodium hypochlorite feeding pipeline II (12) after the first reaction of the sodium hypochlorite and the acetylene gas in the No. 2, is subjected to the second reaction of the sodium hypochlorite and the acetylene gas in the No. 1 cleaning tower (1), the generated waste sodium hypochlorite is pumped to the desorption device to separate out the dissolved sodium hypochlorite in a desorption device, and is pumped to prepare the waste sodium hypochlorite, and the waste sodium hypochlorite is recycled to be the fresh sodium hypochlorite 0.08% of the waste sodium hypochlorite, and the waste sodium hypochlorite is sequentially recycled by the pump, and the waste sodium hypochlorite is recycled to the waste sodium hypochlorite is sequentially.

Example 3: compared with the

embodiments

1 and 2, the difference of the embodiment is that all valves in the utility model are pneumatic valves, and the flowmeter and the signal ends of the valves are connected with a DCS control system.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept, which would fall within the scope of the present utility model.

Claims

1. The utility model provides an automatic controlling means of acetylene cleaning system sodium hypochlorite, includes No. 1 cleaning tower and No. 2 cleaning tower, its characterized in that: the lower part of No. 1 cleaning tower is equipped with acetylene gas feed line, the top of No. 2 cleaning tower is equipped with acetylene gas ejection of compact pipeline, the upper portion of No. 2 cleaning tower is equipped with sodium hypochlorite feed line I, the bottom of No. 2 cleaning tower and the upper portion of No. 1 cleaning tower are equipped with sodium hypochlorite feed line II, be equipped with acetylene gas flowmeter on the acetylene gas ejection of compact pipeline, be equipped with No. 1 flowmeter and No. 1 valve on the sodium hypochlorite feed line I, be equipped with No. 2 flowmeter and No. 2 valve on the sodium hypochlorite feed line II.

2. The automated control device for sodium hypochlorite of an acetylene cleaning system of claim 1, wherein: the bottom of No. 1 cleaning tower is equipped with useless sodium hypochlorite pipeline, be equipped with No. 3 flowmeter and No. 3 valve on the useless sodium hypochlorite pipeline.

3. The automated control device for sodium hypochlorite of an acetylene cleaning system of claim 2, wherein: and a desolventizer, a liquid seal tank and a stripping tower are sequentially arranged between the waste sodium hypochlorite pipeline and the water inlet pipeline.

4. The automated control device for sodium hypochlorite of an acetylene cleaning system of any one of claims 1-3, wherein: still include the blender, the bottom and the I UNICOM of sodium hypochlorite feed line of blender, the top of blender is equipped with dense sodium hypochlorite pipeline and water inlet line respectively, be equipped with No. 5 flowmeter and No. 5 valves on the dense sodium hypochlorite pipeline, be equipped with No. 4 flowmeter and No. 4 valves on the water inlet line.

5. The automated control device for sodium hypochlorite of an acetylene cleaning system of claim 4, wherein: and a sodium hypochlorite configuration groove and a high-level groove are further arranged between the mixer and the sodium hypochlorite feeding pipeline I.

6. The automated control device for sodium hypochlorite of an acetylene cleaning system of claim 5, wherein: the mixer is a venturi.

7. The automated control device for sodium hypochlorite of an acetylene cleaning system of any one of claims 1-3, wherein: and signal ends of the flowmeter and the valve are connected with the DCS control system.

8. The automated control device for sodium hypochlorite of an acetylene cleaning system of claim 4, wherein: and signal ends of the flowmeter and the valve are connected with the DCS control system.

9. The automated control device for sodium hypochlorite of an acetylene cleaning system of any one of claims 5-6, wherein: and signal ends of the flowmeter and the valve are connected with the DCS control system.