Gas-making circulating water treatment device for acyl chloride production

Abstract

The utility model relates to the technical field of acyl chloride production, in particular to a gas-making circulating water treatment device for acyl chloride production, which comprises a water inlet header pipe, a water outlet header pipe and a sewage discharge header pipe, and a purifying and filtering unit is arranged between the water inlet header pipe and the water outlet header pipe; the purifying and filtering unit comprises at least one filler filtering tower; a filtered water inlet is formed in the bottom of the filler filtering tower and is communicated with the water inlet header pipe through a water inlet branch pipe, and a water inlet stop valve is mounted on the water inlet branch pipe; a filtered water outlet is formed in the top of the filler filtering tower and is communicated with the water outlet main pipe through a water outlet branch pipe, and a water outlet stop valve is mounted on the water outlet branch pipe; a rough filtration assembly and a fine filtration assembly are sequentially arranged in the filler filtration tower from bottom to top; the filter has a composite filter structure and an intelligent backwashing function, can operate continuously, and effectively solves the problems that the traditional equipment is poor in filter effect, easy to block and high in maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of acyl chloride production technology, and in particular to a gasification circulating water treatment device for acyl chloride production. Background Technology

[0002] In the gasification stage of carbon monoxide production, circulating water, as a key medium for cooling and washing processes, inevitably becomes contaminated with various impurities during use. These impurities mainly include coal slag particles, dust, microbial slime, and chemical pollutants such as sulfides and phenols. Coal slag particles, originating from incomplete combustion of raw materials, have irregular shapes and high hardness, which can wear down the inner walls of pipes under the scouring of water flow, potentially causing blockages over time. Dust enters the circulating water with the airflow, not only making the water turbid but also providing a breeding ground for microorganisms. The resulting biological slime further exacerbates pipe blockages, and its metabolic byproducts corrode equipment. Furthermore, sulfides react with metal equipment, causing corrosion and perforation, while phenolic compounds are toxic, and direct discharge will severely pollute the environment.

[0003] Currently used circulating water treatment devices have significant drawbacks. Traditional single-layer filter structures not only have poor filtration effects but are also prone to rapid clogging due to impurity accumulation. This forces water pumps to increase power to maintain flow, increasing energy consumption and potentially damaging the equipment. Furthermore, frequent filter replacements are not only labor-intensive and costly but can also cause production interruptions, severely impacting enterprise production efficiency and resulting in high maintenance costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a gasification circulating water treatment device with a composite filtration structure, intelligent backwashing function and continuous operation, in order to address the shortcomings of the existing technology, and solve the problems of poor filtration effect, easy clogging and high maintenance cost of traditional equipment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A gasification circulating water treatment device for acyl chloride production, characterized by:

[0007] It includes an inlet main pipe, an outlet main pipe, and a sewage main pipe, with a purification and filtration unit installed between the inlet main pipe and the outlet main pipe;

[0008] The purification and filtration unit includes at least one packed filter tower;

[0009] The bottom of the packed filter tower is provided with a water inlet, which is connected to the main water inlet through a branch pipe. A water inlet shut-off valve is installed on the branch pipe.

[0010] The top of the packed filter tower is provided with a water outlet, which is connected to the main water outlet through a branch pipe. A water outlet shut-off valve is installed on the branch pipe.

[0011] The packing filter tower has a coarse filter assembly and a fine filter assembly arranged sequentially from bottom to top. A flushing branch pipe is arranged in the packing filter tower above the coarse filter assembly and the fine filter assembly, respectively. One end of each flushing branch pipe extends to the outside of the packing filter tower and is connected to a flushing main pipe. The flushing main pipe is connected to an external air source through an air intake branch. A flushing control valve is installed on the flushing main pipe.

[0012] The bottom of the packed filter tower is also provided with a sewage outlet, which is connected to the main sewage pipe through a sewage branch pipe. A sewage control valve is installed on the sewage branch pipe.

[0013] The technical problem to be solved by this utility model can be further achieved through the following steps: the end of the flushing main pipe is connected to an external water source.

[0014] The technical problem to be solved by this utility model can be further achieved through the following steps: the purification and filtration unit includes at least two packing filter towers arranged in parallel, and the end of the flushing main pipe is connected to the outlet main pipe or the outlet branch pipe corresponding to the same packing filter tower.

[0015] The technical problem to be solved by this utility model can be further achieved through the following steps: the sewage outlet and the filter water inlet are integrated, the filter water inlet is directly connected to the water inlet branch pipe, and the sewage discharge branch pipe is connected to the water inlet branch pipe between the filter water inlet and the water inlet shut-off valve.

[0016] The technical problem to be solved by this utility model can be further achieved through the following steps: the inlet shut-off valve, outlet shut-off valve, flushing control valve, and sewage control valve are all automatic valves that can be remotely controlled.

[0017] The technical problem to be solved by this utility model can be further achieved through the following steps: a differential pressure detection branch is provided on one side of the packed filter tower, and a differential pressure gauge for detecting the pressure difference between the two ends inside the tower is installed on the differential pressure detection branch. The differential pressure gauge is electrically connected to the inlet shut-off valve, the outlet shut-off valve, the flushing control valve and the sewage control valve through the control unit.

[0018] The technical problem to be solved by this utility model can be further achieved through the following steps: the coarse filter assembly includes at least three stacked fine mesh grid plates; the fine filter assembly includes a quartz sand packing layer disposed above the fine mesh grid plates and an activated carbon packing layer disposed above the quartz sand packing layer.

[0019] The technical problem to be solved by this utility model can be further achieved through the following steps: the aperture of the fine mesh grid plate decreases layer by layer from bottom to top, and a flushing branch pipe is correspondingly provided above each layer of fine mesh grid plate.

[0020] The technical problem to be solved by this utility model can be further achieved through the following steps: each flushing branch pipe is provided with a branch pipe control valve on the section extending outside the packing filter tower.

[0021] The technical problem to be solved by this utility model can be further achieved through the following steps: a nitrogen main valve is provided on the gas venting branch.

[0022] Compared with existing technologies, the beneficial effects of this utility model are as follows: By setting a composite filtration structure with coarse and fine filtration components, it can efficiently remove impurities of different sizes and effectively reduce indicators such as turbidity, COD, and ammonia nitrogen, with a significantly improved filtration efficiency compared to traditional equipment; the combined air-water backwashing technology effectively prevents clogging of filter components, reduces energy consumption while ensuring backwashing effect, and the backwash water is recycled, reducing water waste and meeting the development needs of enterprises for energy conservation and emission reduction; the control unit realizes fully automated operation of the device, and operators can monitor the device's operating status in real time through a remote monitoring system, promptly identify and solve problems, and improve production management efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model (backwashing of the packing filter tower on the left, filtration of the packing filter tower on the right).

[0024] Figure 2 This is a schematic diagram of the structure of this utility model (backwashing of the packing filter tower on the right, filtration of the packing filter tower on the left).

[0025] Figure 1-2 In the diagram, the black arrows indicate the direction of water flow, and the white arrows indicate the direction of airflow.

[0026] In the diagram: 1-Inlet main pipe; 2-Outlet main pipe; 3-Sewage main pipe; 4-Packed filter tower; 5-Filter water inlet; 6-Inlet branch pipe; 7-Inlet shut-off valve; 8-Filter water outlet; 9-Outlet branch pipe; 10-Outlet shut-off valve; 11-Flushing branch pipe; 12-Flushing main pipe; 13-Air venting branch; 14-Flushing control valve; 15-Sewage branch pipe; 16-Sewage control valve; 17-Branch control valve; 18-Differential pressure detection branch; 19-Differential pressure gauge; 20-Fine mesh grating; 21-Quartz sand packing layer; 22-Activated carbon packing layer; 23-Nitrogen main valve. Detailed Implementation

[0027] The specific technical solutions of this utility model are further described below to enable those skilled in the art to further understand this utility model, without constituting a limitation on its rights.

[0028] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0029]

Example 1

[0030] Please refer to Figure 1-2 A gasification circulating water treatment device for acyl chloride production includes an inlet main pipe 1, an outlet main pipe 2, and a sewage discharge main pipe 3. The inlet main pipe 1 is connected to the discharge end of the gasification circulating water, the outlet main pipe 2 is connected to the receiving end of the gasification circulating water, and the sewage discharge main pipe 3 is connected to the polluted water workshop.

[0031] A purification and filtration unit is installed between the inlet main pipe 1 and the outlet main pipe 2;

[0032] The purification and filtration unit includes at least one packed filter tower 4;

[0033] The bottom of the packed filter tower 4 is provided with a water inlet 5, which is connected to the main water inlet 1 through a branch pipe 6. A water inlet shut-off valve 7 is installed on the branch pipe 6. A water distributor is installed at the water inlet 5.

[0034] The top of the packed filter tower 4 is provided with a water outlet 8, which is connected to the main water outlet 2 through a branch pipe 9. A water outlet shut-off valve 10 is installed on the branch pipe 9.

[0035] The packing filter tower 4 is provided with a coarse filter assembly and a fine filter assembly arranged from bottom to top. A flushing branch pipe 11 is provided in the packing filter tower 4 above the coarse filter assembly and the fine filter assembly, respectively. One end of each flushing branch pipe 11 extends to the outside of the packing filter tower 4 and is connected to a flushing main pipe 12. The flushing main pipe 12 is connected to an external air source through an air intake branch 13. A flushing control valve 14 is installed on the flushing main pipe 12.

[0036] The bottom of the packed filter tower 4 is also provided with a sewage outlet, which is connected to the main sewage pipe 3 through a sewage branch pipe 15. A sewage control valve 16 is installed on the sewage branch pipe 15.

[0037] The end of the main flushing pipe 12 is connected to an external water source.

[0038] When the system is in filtration mode, the gasification circulating water return enters the packed filter tower 4 through the filter water inlet 5, and after passing through the coarse filter component and the fine filter component for double filtration, it returns to the system circulation through the filter water outlet 8.

[0039] When the filter components need to be cleaned, the system enters the flushing state. The inlet shut-off valve 7 and the outlet shut-off valve 10 are closed. Nitrogen gas is introduced into the flushing main pipe 12 through the air intake branch 13. The flushing branch pipe 11 loosens the contaminants on the surface of the coarse filter components and fine filter components with air blowing. Then, it switches to high-pressure water reverse flushing. At the same time, the sewage control valve 16 is opened so that the loosened and detached contaminants are discharged into the sewage main pipe 3 through the sewage outlet and finally transported to the polluted water workshop for centralized treatment.

[0040]

Example 2

[0041] In Example 1, the purification and filtration unit inevitably needs to be shut down when cleaning the filter components. The difference between Example 2 and Example 1 is that the purification and filtration unit includes at least two packing filter towers 4 arranged in parallel, and the end of the flushing main pipe 12 is connected to the outlet main pipe 2 or the outlet branch pipe 9 corresponding to the same packing filter tower 4.

[0042] With this configuration, when any one of the packed filter towers 4 is being flushed and maintained, the other towers can maintain normal operation, ensuring uninterrupted filtration. At the same time, a portion of the clean effluent from the other towers is diverted through the main outlet pipe 2 and fed back as flushing water, reducing the consumption of external fresh water and realizing the internal recycling of water resources.

[0043] In this embodiment, the sewage outlet and the filter water inlet 5 are integrated, the filter water inlet 5 is directly connected to the water inlet branch pipe 6, and the sewage discharge branch pipe 15 is connected to the water inlet branch pipe 6 between the filter water inlet 5 and the water inlet shut-off valve 7.

[0044] The inlet shut-off valve 7, outlet shut-off valve 10, flushing control valve 14, and sewage control valve 16 are all remotely controllable automatic valves, specifically pneumatic valves in this embodiment.

[0045] A differential pressure detection branch 18 is provided on one side of the packed filter tower 4. A differential pressure gauge 19 for detecting the pressure difference between the two ends inside the tower is installed on the differential pressure detection branch 18. The differential pressure gauge 19 is electrically connected to the inlet shut-off valve 7, the outlet shut-off valve 10, the flushing control valve 14, and the drain control valve 16 through the control unit. When the control unit detects that the filtration pressure difference exceeds the set threshold, the system will automatically shut off the inlet shut-off valve 7 and the outlet shut-off valve 10, and simultaneously open the flushing control valve 14 and the drain control valve 16, entering the flushing state. In this embodiment, the control unit is specifically a Siemens S7-1200 series PLC control cabinet.

[0046] The coarse filtration assembly includes at least three stacked fine mesh grids 20; the fine filtration assembly includes a quartz sand packing layer 21 disposed above the fine mesh grids 20 and an activated carbon packing layer 22 disposed above the quartz sand packing layer 21. During filtration, water flows through the fine mesh grids 20 in a laminar flow state, blocking large particulate impurities. The fine mesh grids 20 are made of stainless steel, which has high strength and corrosion resistance. The water that has undergone preliminary filtration passes through the quartz sand packing layer 21 to trap fine suspended solids, and finally passes through the activated carbon packing layer 22 to adsorb and remove microorganisms and even finer particulate matter, thereby achieving a step-by-step deep purification.

[0047] The aperture of the fine mesh grid plate 20 decreases from bottom to top, and a flushing branch pipe 11 is provided above each layer of fine mesh grid plate 20 to perform deep flushing of each layer of fine mesh grid plate 20.

[0048] Each flushing branch pipe 11 is equipped with a branch pipe control valve 17 on the section extending outside the packing filter tower 4, so as to realize the step-by-step flushing of each flushing branch pipe 11.

[0049] A nitrogen main valve 23 is installed on the gas venting branch 13 to control the flow of nitrogen.

[0050] Please refer to Figure 1 The following uses two packed filter towers 4 as examples to illustrate the usage of this utility model. The two packed filter towers 4 will be referred to as T1 (left in the figure) and T2 (right in the figure) respectively:

[0051] (1) System startup:

[0052] Start the booster pump in the main inlet pipe 1. The gasification circulating water return water enters T1 through the inlet branch pipe 6. After being filtered by the coarse filter assembly (fine mesh grid plate 20) and the fine filter assembly (quartz sand packing layer 21 and activated carbon packing layer 22), it flows into the main outlet pipe 2 through the outlet branch pipe 9 and returns to the production system for recycling.

[0053] (2) Flushing trigger:

[0054] When the differential pressure gauge 19 of T1 exceeds the set threshold, the inlet valve 7 and outlet valve 10 of T1 are automatically closed, and T1 switches to flushing mode. Figure 1 Simultaneously open the inlet shut-off valve 7 and outlet shut-off valve 10 of T2, and T2 maintains the system filtration.

[0055] (3) Rinsing steps:

[0056] a. Loosening with air – Open the main nitrogen valve 23, and open each branch control valve 17 individually from bottom to top at intervals. Purge each fine mesh grid plate 20, quartz sand packing layer 21, and activated carbon packing layer 22 with nitrogen for 2 minutes each.

[0057] b. Water flushing - Close the nitrogen main valve 23, open the flushing control valve 14 and the sewage control valve 16. The clean water after T2 filtration is diverted to the cleaning branch pipe of T1 through the water outlet main pipe 2 and then enters the flushing main pipe 12 of T1. The control valves 17 of each branch pipe are opened separately from bottom to top. The water flow flushes each fine mesh grid plate 20, quartz sand packing layer 21 and activated carbon packing layer 22 for 5 minutes each.

[0058] (4) Alternating rinsing:

[0059] After T1 flushing is complete, close all valves and wait for use; when the differential pressure gauge 19 reading of T2 is higher than the set value of the control unit, T1 enters the filtration state, and T2 enters the flushing state. Figure 2 ), used alternately in sequence.

[0060] In summary, this invention, through its composite filtration structure of coarse and fine filtration components, can efficiently remove impurities of different sizes and effectively reduce turbidity, COD, ammonia nitrogen, and other indicators, significantly improving filtration efficiency compared to traditional equipment. The combined air-water backwashing technology reduces energy consumption while ensuring backwashing effectiveness. Furthermore, the recycling of backwash water reduces water waste, meeting the energy conservation and emission reduction needs of enterprises. The control unit enables fully automated operation of the device, allowing operators to monitor its operation in real time via a remote monitoring system, promptly identify and resolve problems, and improve production management efficiency.

[0061] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A gasification circulating water treatment device for acyl chloride production, characterized in that: It includes an inlet main pipe, an outlet main pipe, and a sewage main pipe, with a purification and filtration unit installed between the inlet main pipe and the outlet main pipe; The purification and filtration unit includes at least one packed filter tower; The bottom of the packed filter tower is provided with a water inlet, which is connected to the main water inlet through a branch pipe. A water inlet shut-off valve is installed on the branch pipe. The top of the packed filter tower is provided with a water outlet, which is connected to the main water outlet through a branch pipe. A water outlet shut-off valve is installed on the branch pipe. The packing filter tower has a coarse filter assembly and a fine filter assembly arranged sequentially from bottom to top. A flushing branch pipe is arranged in the packing filter tower above the coarse filter assembly and the fine filter assembly, respectively. One end of each flushing branch pipe extends to the outside of the packing filter tower and is connected to a flushing main pipe. The flushing main pipe is connected to an external air source through an air intake branch. A flushing control valve is installed on the flushing main pipe. The bottom of the packed filter tower is also provided with a sewage outlet, which is connected to the main sewage pipe through a sewage branch pipe. A sewage control valve is installed on the sewage branch pipe.

2. The gasification circulating water treatment apparatus for acyl chloride production according to claim 1, characterized by: The end of the main flushing pipe is connected to an external water source.

3. The gasification circulating water treatment apparatus for acyl chloride production according to claim 1, characterized by: The purification and filtration unit includes at least two packing filter towers arranged in parallel, and the end of the flushing main pipe is connected to the outlet main pipe or the outlet branch pipe corresponding to the same packing filter tower.

4. The gasification circulating water treatment apparatus for acyl chloride production according to claim 1, characterized by: The sewage outlet and the filter water inlet are integrated, the filter water inlet is directly connected to the water inlet branch pipe, and the sewage discharge branch pipe is connected to the water inlet branch pipe between the filter water inlet and the water inlet shut-off valve.

5. The gasification circulating water treatment apparatus for acyl chloride production according to claim 1, characterized by: The inlet shut-off valve, outlet shut-off valve, flushing control valve, and sewage control valve are all remotely controllable automatic valves.

6. The gasification circulating water treatment apparatus for acyl chloride production according to claim 5, characterized by: A differential pressure detection branch is provided on one side of the packed filter tower. A differential pressure gauge is installed on the differential pressure detection branch to detect the pressure difference between the two ends inside the tower. The differential pressure gauge is electrically connected to the inlet shut-off valve, outlet shut-off valve, flushing control valve and sewage control valve through the control unit.

7. The gasification circulating water treatment apparatus for acyl chloride production according to claim 1, characterized by: The coarse filter assembly includes at least three stacked fine mesh grids; the fine filter assembly includes a quartz sand packing layer disposed above the fine mesh grids and an activated carbon packing layer disposed above the quartz sand packing layer.

8. The gasification circulating water treatment apparatus for acyl chloride production according to claim 7, characterized by: The aperture of the fine mesh grid plate decreases layer by layer from bottom to top, and a flushing branch pipe is provided above each layer of fine mesh grid plate.

9. The gasification circulating water treatment apparatus for acyl chloride production according to claim 1, characterized by: Each flushing branch pipe is equipped with a branch pipe control valve on the section extending outside the packing filter tower.

10. The gasification circulating water treatment apparatus for acyl chloride production according to claim 1, characterized by: A nitrogen master valve is installed on the gas venting branch.

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