Raw gas washing device
By employing a two-stage spraying method and ammonia absorption in the raw coal gas scrubbing unit, the problem of poor purification effect of existing equipment has been solved, achieving efficient removal of smoke and dust, reducing equipment blockage and catalyst poisoning risks, improving production efficiency and reducing costs.
Patent Information
- Application Number
- CN202423006049.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-06
AI Technical Summary
Existing raw coal gas scrubbing devices are ineffective at purifying entrained impurities such as smoke and coal tar, leading to blockages in subsequent equipment and catalyst poisoning, which affects production efficiency and costs.
A two-stage spraying method is adopted. The first spraying component sprays the raw coal gas inlet pipe, and the second spraying component sprays the raw coal gas in the clean gas chamber. The droplets move towards the raw coal gas, increasing the contact area and time. Combined with ammonia absorption, the purification efficiency is improved.
It effectively removes particulate matter from raw coal gas, reduces the risk of equipment blockage, extends catalyst life, improves production efficiency, and reduces operating costs.
Smart Images
Figure CN223453954U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of raw coal gas washing, more particularly to a raw coal gas washing device. BACKGROUND
[0002] Modern coke ovens usually adopt a single carbonization chamber pressure regulating system, which adjusts the raw coal gas flow by controlling the raw coal gas flow area, and maintains a pressure of about -300 Pa in the gas collecting pipe. After the coke oven adopts the single carbonization chamber pressure regulating system, the ground dust removal station matched with the coke oven is cancelled, which causes the coke oven flue dust originally treated by the ground dust removal station to enter the subsequent coal gas purification section with the negative pressure raw coal gas, and the raw coal gas needs to be purified by increasing the washing device.
[0003] In the prior art, the raw coal gas washing device only has a simple spraying function, and has a small purification effect on the smoke dust and coal tar impurities entrained in the raw coal gas. The raw coal gas with a large amount of smoke dust entering the subsequent equipment will cause the subsequent equipment to be blocked; the smoke dust not removed will be entrained into other products, causing the product quality to decrease; and the excessive smoke dust will cause the catalyst to be poisoned, resulting in a decrease in the service life of the catalyst and an increase in operating costs.
[0004] Therefore, how to improve the purification efficiency of the raw coal gas has become a technical problem to be solved by the technical personnel in the field. UTILITY MODEL CONTENTS
[0005] Therefore, the utility model aims to provide a raw coal gas washing device to improve the purification efficiency of the raw coal gas.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0007] A raw coal gas washing device comprises:
[0008] A clean gas chamber is connected to a raw coal gas inlet pipeline and a raw coal gas exhaust pipeline, the raw coal gas inlet pipeline is arranged at the top of the clean gas chamber, the raw coal gas exhaust pipeline is arranged on the side wall of the clean gas chamber, and ammonia water is arranged at the bottom of the clean gas chamber.
[0009] A spraying system is connected to the clean gas chamber, the spraying system comprises a first spraying assembly and a second spraying assembly, the first spraying assembly sprays the raw coal gas in the raw coal gas inlet pipeline, the second spraying assembly sprays the raw coal gas in the clean gas chamber, and the liquid droplets sprayed by the spraying system move towards the raw coal gas.
[0010] Optionally, in the above-mentioned raw coal gas washing device, the first spraying assembly comprises a first spraying pipe and a first nozzle connected to the first spraying pipe, the first nozzle is arranged in the raw coal gas inlet pipeline, and the number of the first nozzles is at least one.
[0011] Optionally, in the above-mentioned raw gas washing device, the second spraying assembly comprises a second spraying pipe and a second nozzle in communication with the second spraying pipe, the second spraying pipe is arranged in a ring shape, and the second nozzle comprises a plurality of nozzles arranged at intervals along the circumference of the second spraying pipe.
[0012] Optionally, in the above-mentioned raw gas washing device, the first nozzle and the second nozzle are both atomizing nozzles.
[0013] Optionally, in the above-mentioned raw gas washing device, the end of the raw gas inlet pipeline is provided with a gas distributor in a conical structure.
[0014] Optionally, in the above-mentioned raw gas washing device, the raw gas inlet pipeline is in communication with the water inlet pipeline through a reducing joint.
[0015] Optionally, in the above-mentioned raw gas washing device, the raw gas inlet pipeline is in communication with the water inlet pipeline through a reducing joint.
[0016] Optionally, in the above-mentioned raw gas washing device, the clean gas chamber is provided with a drain pipe.
[0017] Optionally, in the above-mentioned raw gas washing device, the clean gas chamber is provided with an overflow controller in communication with the drain pipe through an overflow pipe.
[0018] Optionally, in the above-mentioned raw gas washing device, the bottom of the clean gas chamber is in a funnel structure.
[0019] As can be seen from the above, the raw gas washing device disclosed by the present application sprays the raw gas in the raw gas inlet pipeline through the first spraying assembly, sprays the raw gas in the clean gas chamber through the second spraying assembly, adopts a twice-spraying mode, the liquid droplets and the raw gas move towards each other, which can make the raw gas and the liquid droplets fully contact, so that they have sufficient contact area and contact time, which helps to reduce the mass transfer resistance and improve the absorption efficiency. The smoke dust particles in the raw gas are captured and settled by the liquid droplets, and the smoke dust particles and the liquid droplets react chemically or are dissolved and absorbed by the liquid droplets, thereby improving the purification efficiency of the raw gas. BRIEF DESCRIPTION OF DRAWINGS
[0020] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0021] Figure 1The cross section of the raw coal gas washing device is disclosed in the embodiments of the utility model Figure 1 ;
[0022] Figure 2 The top view of the raw coal gas washing device is disclosed in the embodiments of the utility model Figure 1 ;
[0023] Figure 3 The cross section of the raw coal gas washing device is disclosed in the embodiments of the utility model Figure 2 ;
[0024] Figure 4 The top view of the raw coal gas washing device is disclosed in the embodiments of the utility model Figure 2 .
[0025] 1, raw coal gas inlet pipeline, 2, water inlet pipe, 3, gas distributor, 4, clean gas chamber, 5, raw coal gas exhaust pipeline, 6, drain pipe, 7, overflow controller, 8, overflow pipe, 9, spraying system, 91, first spraying assembly, 911, first spraying pipe, 912, first nozzle, 92, second spraying assembly, 921, second spraying pipe, 922, second nozzle, 10, reducing joint. DETAILED DESCRIPTION
[0026] Related explanation:
[0027] Raw coal gas: the coal gas produced from the coke oven without treatment.
[0028] The core of the utility model lies in disclosing a kind of raw coal gas washing device to improve the purification efficiency of coal gas.
[0029] It should be noted that the raw coal gas washing device is arranged between coke oven and primary cooler, and the raw coal gas discharged from coke oven enters primary cooler after being purified by raw coal gas washing device.
[0030] The technical solutions in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.
[0031] As shown in Figure 1 The utility model embodiment discloses a kind of raw coal gas washing device, including clean gas chamber 4 and spraying system 9.
[0032] As shown in Figures 2-4As shown, the clean air chamber 4 is connected to the raw gas inlet pipe 1 and the raw gas exhaust pipe 5. The raw gas inlet pipe 1 is arranged at the top of the clean air chamber 4, and the raw gas exhaust pipe 5 is arranged on the side wall of the clean air chamber 4, preferably at the top of the side wall of the clean air chamber 4.
[0033] The spray system 9 is connected to the clean gas chamber 4. The spray system 9 includes a first spray component 91 and a second spray component 92. The first spray component 91 sprays the raw gas in the raw gas inlet pipe 1, and the second spray component 92 sprays the raw gas in the clean gas chamber 4. The droplets sprayed by the spray system 9 move in opposite directions to the raw gas. The bottom of the clean gas chamber 4 is filled with ammonia water, which can accommodate the droplets sprayed by the spray system 9 on the one hand, and absorb the flue gas particles in the raw gas on the other hand.
[0034] Preferably, the raw gas inlet pipe 1 extends into the clean gas chamber 4, the first spray assembly 91 is connected to the raw gas inlet pipe 1, and the second spray assembly 92 is connected to the clean gas chamber 4. The spraying medium of the spray system 9 is preferably ammonia water, which can purify the raw gas on the one hand and cool the raw gas on the other.
[0035] like Figure 1 As shown in the figure, raw gas flows from the raw gas inlet pipe 1 at the top of the clean gas chamber 4, flowing from top to bottom. As indicated by the arrows in the figure, the droplets sprayed by the first spray assembly 91 first move upward, fully contacting the raw gas, and then move downward under the action of gravity. After entering the clean gas chamber 4, the raw gas is discharged from the raw gas exhaust pipe 5 at the top. The raw gas flows from the clean gas chamber 4 from bottom to top, so the droplets sprayed by the second spray assembly 92 move from top to bottom, allowing the raw gas and the droplets to fully contact, allowing smoke particles in the raw gas to reach the surface of the droplets or enter the droplets. The droplets eventually fall to the bottom of the clean gas chamber 4 under the action of gravity, achieving the effect of purifying the raw gas. Figure 1 The arrow structure on the spray system 9 shown in FIG. 1 represents the movement direction of the droplets.
[0036] The raw gas scrubbing device disclosed in the embodiment of the present utility model sprays the raw gas in the raw gas inlet pipe 1 via a first spray assembly 91 and the raw gas in the clean gas chamber 4 via a second spray assembly 92. The two spraying processes allow the spray droplets to move toward each other, ensuring sufficient contact area and time between the raw gas and the droplets. This helps reduce mass transfer resistance and improve absorption efficiency. Smoke particles in the raw gas are captured by the droplets and then settle. Simultaneously, the smoke particles react chemically with the droplets or are dissolved and absorbed by the droplets, thereby improving the purification efficiency of the raw gas.
[0037] The coke oven sends out the raw coke oven gas from the top of the coke oven, and the height of the pipeline is about 15 m. The primary cooler usually adopts a parallel mode, and the raw coke oven gas pipeline and the gas valve are arranged at a height of about 5 m in front of each primary cooler. In the existing raw coke oven gas washing device, the gas enters from the side and is discharged from the top, so that the raw coke oven gas pipeline needs to be lowered once before entering the raw coke oven gas washing device and lowered again before entering the primary cooler, and the arrangement form of the gas pipeline increases the construction cost. The raw coke oven gas washing device disclosed in the embodiment of the utility model can directly connect the raw coke oven gas pipeline from the coke oven to the clean gas chamber 4, and can reduce the pipeline construction cost.
[0038] In some embodiments, as shown in Figure 2 The first spraying assembly 91 includes a first spraying pipe 911 and a first nozzle 912 in communication with the first spraying pipe 911, and the number of the first nozzle 912 is at least one, and specifically can be two or more. The first spraying pipe 911 extends into the raw coke oven gas inlet pipeline 1 through an opening on the raw coke oven gas inlet pipeline 1, and sealing measures are taken at the opening position, and the first nozzle 912 is located in the raw coke oven gas inlet pipeline 1.
[0039] The second spraying assembly 92 includes a second spraying pipe 921 and a second nozzle 922 in communication with the second spraying pipe 921, and the second spraying pipe 921 is arranged in a ring shape, and the second spraying pipe 921 is not limited to one and can be arranged in multiple. The second nozzle 922 includes a plurality of nozzles arranged at intervals along the circumference of the second spraying pipe 921, and the specific number can be set according to actual needs. Preferably, the second spraying pipe 921 is arranged close to the top of the clean gas chamber 4, so that the liquid droplets sprayed by the second nozzle 922 can fully contact the raw coke oven gas. The arrangement of the ring-shaped second spraying pipe 921 and the plurality of second nozzles 922 can further improve the purification efficiency of the raw coke oven gas. The first nozzle 912 and the second nozzle 922 are preferably atomizing nozzles.
[0040] In some embodiments, the spraying system 9 includes a spraying pump, a spraying liquid storage device and a spraying pipe, the spraying pump is arranged on the spraying pipe and is in communication with the spraying liquid storage device to provide power, and the first spraying pipe 911 and the second spraying pipe 921 are in communication with the spraying pipe, which can be in separate communication or in communication after being combined with the spraying pipe, and the specific connection mode is not limited. Control valves are arranged on the first spraying pipe 911 and the second spraying pipe 921, and the control valves are preferably electric valves such as solenoid valves, and the spraying pump is preferably a variable frequency pump, and the flow of the spraying liquid can be controlled by changing the frequency of the spraying pump.
[0041] In order to further improve the purification efficiency, in some embodiments, as shown in Figure 1 and Figure 3As shown, the end of the raw coal gas inlet pipeline 1 is provided with a gas distributor 3, the shape of the gas distributor 3 is conical, specifically, the small end of the gas distributor 3 is connected with the raw coal gas inlet pipeline 1, and the large end faces the bottom of the clean gas chamber 4. Under the joint action of the gas distributor 3 and the ammonia water liquid surface at the bottom of the clean gas chamber 4, the raw coal gas flows radially, this mode can change the flow direction of the raw coal gas, so that part of the dust particles carried by the raw coal gas are separated from the raw coal gas under the action of inertia and enter the ammonia water at the bottom of the clean gas chamber 4, thereby further improving the purification efficiency.
[0042] In order to separate the ammonia water in the raw coal gas inlet pipeline 1, further, the raw coal gas washing device further comprises a water inlet pipe 2, as shown in Figure 1 and Figure 3 As shown, the water inlet pipe 2 is arranged upstream of the clean gas chamber 4, one end of the water inlet pipe 2 is communicated with the raw coal gas inlet pipeline 1, and the other end is communicated with the clean gas chamber 4, specifically, the ammonia water at the bottom of the clean gas chamber 4, so that the ammonia water in the raw coal gas enters the bottom of the clean gas chamber 4 under the action of gravity through the water inlet pipe 2. Compared with the prior art scheme of arranging a gas-liquid separator in front of the raw coal gas washing device, this scheme can reduce the cost. The gas distributor 3 is arranged above the ammonia water liquid surface, without extending into the ammonia water liquid surface, which can reduce the equipment resistance.
[0043] Further, in order to better discharge the ammonia water in the raw coal gas and ensure the smoothness of the gas flow channel in the raw coal gas inlet pipeline 1, the raw coal gas inlet pipeline 1 is communicated with the water inlet pipe 2 through a reducing joint 10, that is, the pipe diameter of the water inlet pipe 2 is smaller than that of the raw coal gas inlet pipeline 1. Specifically, the raw coal gas inlet pipeline 1 and the water inlet pipe 2 can be communicated through a straight tee joint and a reducing joint.
[0044] Further, as shown in Figure 1 and Figure 3 The clean gas chamber 4 is provided with a drain pipe 6 to facilitate timely discharge of the ammonia water for treating flue gas particulate matter, a shut-off valve is arranged on the drain pipe 6, and the shut-off valve can be a manual valve or an electric valve.
[0045] As shown in Figure 1 In order to control the liquid level in the clean gas chamber 4 to a predetermined height, the clean gas chamber 4 is provided with an overflow controller 7, the overflow controller 7 is communicated with the drain pipe 6 through an overflow pipe 8 to discharge excess ammonia water in the overflow controller 7.
[0046] In some specific embodiments, the bottom of the clean gas chamber 4 is in a funnel structure, and the drain pipe 6 is connected with the bottom of the funnel structure, which facilitates the discharge of the ammonia water and can improve the drainage efficiency.
[0047] It should be noted that each of the embodiments in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same and similar parts between the embodiments can be referred to each other.
[0048] The terms "first", "second" are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.
[0049] The terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the utility model and simplifying the description, and cannot be understood as indicating or implying that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the utility model.
[0050] The principles and implementation modes of the utility model are described by applying specific examples herein. The above description of the embodiments is only for the purpose of helping to understand the core idea of the utility model. It should be pointed out that for ordinary skilled persons in the technical field, without departing from the principles of the utility model, the utility model can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the utility model.
Claims
1. A raw gas scrubbing device, characterized by The utility model relates to a kind of ammonia water injection device for raw gas, including: Net gas chamber (4), the net gas chamber (4) is communicated with raw gas inlet pipeline (1) and raw gas exhaust pipeline (5), the raw gas inlet pipeline (1) is set to the top of the net gas chamber (4), the raw gas exhaust pipeline (5) is set on the side wall of the net gas chamber (4), the bottom of the net gas chamber (4) is provided with ammonia water; Spraying system (9), the spraying system (9) is communicated with the net gas chamber (4), the spraying system (9) includes first spraying assembly (91) and second spraying assembly (92), the first spraying assembly (91) is sprayed to raw gas in the raw gas inlet pipeline (1), the second spraying assembly (92) is sprayed to raw gas in the net gas chamber (4), the liquid drop that the spraying system (9) sprays and raw gas move towards each other.
2. The raw gas scrubbing device as claimed in claim 1, characterized in that The first spraying assembly (91) includes first spraying pipe (911) and first nozzle (912) communicated with the first spraying pipe (911), the first nozzle (912) is located in the raw gas inlet pipeline (1), and the number of the first nozzle (912) is at least one.
3. The raw gas scrubbing device as claimed in claim 2, characterized in that The second spraying assembly (92) includes second spraying pipe (921) and second nozzle (922) communicated with the second spraying pipe (921), the second spraying pipe (921) is arranged in a ring shape, and the second nozzle (922) includes a plurality of intervals arranged along the circumference of the second spraying pipe (921).
4. The raw gas scrubbing device according to claim 3, wherein The first nozzle (912) and the second nozzle (922) are both atomizing nozzles.
5. The raw gas scrubbing device as claimed in claim 1, wherein The end of the raw gas inlet pipeline (1) is provided with a gas distributor (3), and the gas distributor (3) is in a conical structure.
6. The raw gas scrubbing device as claimed in claim 1, wherein It also includes a water inlet pipe (2), one end of the water inlet pipe (2) is communicated with the raw gas inlet pipeline (1), and the other end is communicated with the net gas chamber (4).
7. The raw gas scrubbing device as claimed in claim 6, characterized in that The raw gas inlet pipeline (1) is communicated with the water inlet pipe (2) through a reducing joint (10).
8. The raw gas scrubbing device as claimed in claim 1, wherein The net gas chamber (4) is provided with a drain pipe (6).
9. The raw gas scrubbing device as claimed in claim 8, characterized in that The net gas chamber (4) is provided with an overflow controller (7), and the overflow controller (7) communicates the drain pipe (6) through an overflow pipe (8).
10. The raw gas scrubbing device as claimed in claim 8, characterized in that The bottom of the net gas chamber (4) is in a funnel structure.