CN215048811U

CN215048811U - Ammonia still arranges sediment device and arranges sediment, tail gas treatment integrated device and system

Info

Publication number: CN215048811U
Application number: CN202023277049.1U
Authority: CN
Inventors: 李俊玲; 李庆生; 陈淼; 王海宁; 李朝维; 张顺贤
Original assignee: Shandong Province Metallurgical Engineering Co Ltd
Current assignee: Shandong Province Metallurgical Engineering Co Ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-12-07
Anticipated expiration: 2030-12-29

Abstract

The utility model belongs to the technical field of chemical production, specifically provide an ammonia still row's sediment device and arrange sediment, tail gas treatment integrated device and system. The ammonia still residue extraction device is a totally enclosed device, and has a reboiler residue extraction inlet, an ammonia still residue extraction inlet and a residue extraction tail gas outlet on the upper wall of the ammonia still residue extraction device, and a waste water close outlet on the side wall of the ammonia still residue extraction device, and a liquid residue extraction pipeline is connected to the waste water close outlet. The problem of present ammonia still and reboiler adopt the mode of arranging the sediment in line, arrange the sediment peculiar smell big, often waste water overflows, evaporate ammonia waste gas and directly discharge into the atmosphere and influence the environment is solved.

Description

Ammonia still arranges sediment device and arranges sediment, tail gas treatment integrated device and system

Technical Field

The utility model belongs to the technical field of chemical production, specifically provide an ammonia still row's sediment device and arrange sediment, tail gas treatment integrated device and system.

Background

The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

In the coking industry, in a gas purification system, residual ammonia water is treated by an ammonia still. At present, the novel coke ovens are large-sized, and the height of a carbonization chamber is more than 6.25 meters. During the discharging process of the coke oven, a large amount of coal powder and coke powder are sucked into the rear recovery system. Therefore, the remaining ammonia water contains a large amount of tar, tar residue, and the like. The dregs enter an ammonia still and a reboiler along with the residual ammonia water, are deposited at the bottoms of the ammonia still and the reboiler, and become asphalt substances after high temperature. In order to ensure that the ammonia still operates normally, the waste residues must be discharged outside, the waste residues of asphalts are easy to harden in a short time, the residue discharge pool is blocked quickly when the waste residues are not cleaned in time, and manual digging must be carried out when the waste residues are seriously stopped, so that great impact is caused on a rear sewage system, and the qualification of the effluent ammonia nitrogen index is influenced.

For this reason, the waste residue in the ammonia still is regularly discharged in the prior art, however, the inventor finds that the prior art generally adopts a direct discharge mode, the peculiar smell is large when discharging the residue, and partial ammonia still waste water overflows, and the ammonia still waste gas is directly discharged into the atmosphere, thus seriously affecting the environment.

Disclosure of Invention

The method aims at solving the problems that the prior ammonia distillation tower and reboiler adopt a direct-discharge mode to discharge slag, the discharged slag has large peculiar smell, the waste water overflows frequently, and the ammonia distillation waste gas is directly discharged into the atmosphere to influence the environment.

In one or more embodiments of the present disclosure, an ammonia still deslagging device is provided, where the ammonia still deslagging device is a fully sealed device, a reboiler deslagging inlet, an ammonia still deslagging inlet, and a deslagging tail gas outlet are disposed above the ammonia still deslagging device,

and a wastewater full-flow outlet is formed in the side wall of the ammonia still deslagging device and is connected with a liquid deslagging pipeline.

In one or some embodiments of the present disclosure, an ammonia still residue discharging and tail gas treating integrated device is provided, which includes the ammonia still residue discharging device and a tail gas purifying system, wherein the residue discharging tail gas outlet is connected to the tail gas purifying system.

In one or some embodiments of the present disclosure, an ammonia distillation system is provided, which includes an ammonia distillation tower, a reboiler, and the ammonia distillation tower deslagging system or the ammonia distillation tower deslagging and tail gas treatment integrated device.

One or some of the above technical solutions have the following advantages or beneficial effects:

1) the newly-added airtight ammonia still sediment case can be changed in the short time to keep airtight state throughout the production overall process, arrange the sediment process and do not have any peculiar smell, the naked eye can not see yet, and the bivalve of increase prevents that one of them valve from breaking down effectually, can implement the change. Under the condition of increasingly severe environmental protection situation at present, the novel environment-friendly ammonia still can effectively bring good environmental protection benefits to production enterprises.

2) The ammonia still deslagging tank is replaced by a closed type from an original open type, a wastewater full flow pipe is added, full-flow ammonia still wastewater enters an ammonia still underground tank, a reboiler and the ammonia still deslagging pipe are connected with the deslagging tank through flanges, the ammonia still deslagging tank is made of all stainless steel, a tail gas pipeline is arranged at the top of the deslagging tank and is connected with a tail gas purification system, and the situation that tail gas is directly discharged into the atmosphere to pollute the environment is avoided.

3) The deslagging device of the ammonia still disclosed is arranged in a closed manner, can be replaced in a short time, is always kept in a closed state in the whole production process, has no peculiar smell in the deslagging process, avoids leakage generated in the deslagging process, and can be replaced by effectively preventing one valve from being broken down due to the added double valves.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the disclosure and, together with the description, serve to explain the disclosure and not to limit the disclosure.

FIG. 1 is a schematic view of a slag discharge apparatus of an ammonia still in example 1.

Wherein: 1. a first reboiler blowdown valve; 2. a second reboiler residue discharge valve; 3. a first slag discharge tail gas valve; 4. a second valve for the tail gas of the slag discharge; 5. a first ammonia still deslagging valve; 6. a second ammonia still deslagging valve; 7. a first wastewater full flow valve; 8. and a second wastewater full-flow valve.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the disclosure without making any creative effort, shall fall within the protection scope of the disclosure.

The residue discharging device of the ammonia still is a fully-closed device, so that the problem of peculiar smell in the residue discharging process is avoided, the environmental pollution is greatly reduced, the fully-closed device cannot overflow in the moving process, and the residue discharging device of the ammonia still can be directly loaded and transported away to the vicinity of the residue processing device when the residue processing device is far away from the residue mobile phone device or a pipeline is inconvenient to prolong and set in the industrial practical application process.

Preferably, the slag-off tail gas outlet is positioned between the slag-off inlet of the reboiler and the slag-off inlet of the ammonia still. Because in the prior art, in order to improve the energy utilization efficiency of the ammonia still, the reboiler is usually connected to the bottom of the ammonia still, so that the waste residues are generated at the bottom of the ammonia still and a large amount of waste residues are generated in the reboiler, and therefore, the residue discharge inlet of the reboiler and the residue discharge inlet of the ammonia still are connected to the upper wall of the residue discharge device of the ammonia still, and the problem that the waste residues in the reboiler are difficult to discharge is avoided.

The waste residues of the reboiler and the ammonia still are usually positioned at the bottom of the tower, so the residue outlets of the reboiler and the ammonia still are arranged at the bottom of the tower, the residue discharge inlet of the residue discharge device of the ammonia still is arranged above the reboiler, and the flow of the waste water in a pipeline connected with the residue discharge inlet of the ammonia still is stopped when the residue discharge device of the ammonia still is filled with the waste water, and then the inlet valve of an operator is closed.

Preferably, the residue discharge inlet of the reboiler, the residue discharge inlet of the ammonia still and the residue discharge tail gas outlet are respectively provided with a control valve, the number of the control valves at each position is at least 2, one of the control valves is a common valve, and the other control valves are standby valves. Because carry the powdered suspension waste residue of small part in the waste water, and the waste residue has certain viscidity, therefore the waste water is probably gathering in valve department when flowing through, and in the time, the valve is blockked up, for avoiding this kind of problem, the valve of this disclosure is used one by one and is equipped with, and when valve block up commonly used, can not realize the shutdown function, the switching function is realized to the reserve valve. Of course, if the normal valve cannot realize the opening function, only the pipeline can be replaced.

Preferably, the standby valves are all in an open state. And (4) checking the standby valve frequently to ensure that the standby valve is not blocked, and only when the common valve is blocked, normally opening and closing the standby valve according to the process flow.

Preferably, the liquid slag discharge pipeline comprises a plurality of control valves, one of the control valves is a common valve, the other control valves are standby valves, and the standby valves are all in an open state. The control valves are the same as those at a residue discharge inlet of the reboiler, a residue discharge inlet of the ammonia still and a residue discharge tail gas outlet of the ammonia still, so that the valves are prevented from being blocked by waste residues and cannot be normally opened and closed.

Preferably, the bottom of the ammonia still deslagging device is provided with a deslagging outlet. When the deslagging device of the ammonia distillation tower is full, all valves are closed, and the waste slag collected in the deslagging device of the ammonia distillation tower is discharged.

Preferably, all pipeline connecting parts of the ammonia still deslagging device are connected through flanges. The flange is a detachable flange, so that the flange can be detached when the slag discharge device of the ammonia still is moved conveniently and disconnected with the pipeline.

In one or some embodiments of the present disclosure, an ammonia still residue discharging and tail gas treating integrated device is provided, which includes the ammonia still residue discharging device and a tail gas purifying system, wherein the residue discharging tail gas outlet is connected to the tail gas purifying system. Because the waste material in the ammonia still has certain heat, evaporates a large amount of waste gases, if get into the atmosphere then bring the pollution to the environment, for avoiding this problem, this disclosure links to each other row's sediment tail gas export with tail gas clean system, because gas density is low, gaseous row's sediment tail gas export from ammonia still row sediment device top gets into tail gas clean system, gets into the negative pressure gas pipeline behind purifying tail gas in tail gas clean system.

Preferably, the bottoms of the ammonia still and the reboiler are provided with slag discharge outlets.

Example 1

As shown in FIG. 1, the present embodiment provides an ammonia still deslagging apparatus, comprising: the system comprises a first reboiler deslagging valve 1, a second reboiler deslagging valve 2, a first ammonia still deslagging valve 5, a second ammonia still deslagging valve 6, a first deslagging tail gas valve 3, a second deslagging tail gas valve 4, a first wastewater full-flow valve 7, a second wastewater full-flow valve 8 and a closed deslagging box.

Example 2

The embodiment provides a deslagging method for an ammonia still, which comprises the following steps:

during normal production, the first slag-discharging tail gas valve 3 and the second slag-discharging tail gas valve 4 are both in an opening stage, the second ammonia still slag-discharging valve 6 and the second reboiler slag-discharging valve 2 are in an opening condition, the first ammonia still slag-discharging valve 5 and the first reboiler slag-discharging valve 1 are in a closing condition, when slag is periodically discharged, the first ammonia still slag-discharging valve 5 and the first reboiler slag-discharging valve 1 are opened, after slag discharge is finished, the first ammonia still slag-discharging valve 5 and the first reboiler slag-discharging valve 1 are closed, and slag discharge operation is finished.

Observing the ammonia still through a sight glass that the residue discharging tank of the ammonia still is full, transporting the standby residue discharging tank to the site by utilizing a forklift in advance, closing a first reboiler residue discharging valve 1, a second reboiler residue discharging valve 2, a first ammonia still residue discharging valve 5, a second ammonia still residue discharging valve 6, a first residue discharging tail gas valve 3 and a second residue discharging tail gas valve 4, after removing flanges on all second valves, performing flange connection with flanges below all second valves through reserved flanges on the new residue tank, conveying the replaced residue tank to a coal blending greenhouse or a coal yard, and performing standby after cleaning.

The disclosure of the present invention is not limited to the specific embodiments, but rather to the specific embodiments, the disclosure is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A deslagging device of an ammonia still is characterized in that the deslagging device of the ammonia still is a fully-sealed device, a reboiler deslagging inlet, an ammonia still deslagging inlet and a deslagging tail gas outlet are arranged above the deslagging device of the ammonia still,

2. The ammonia still residue extraction device of claim 1, wherein the residue extraction tail gas outlet is located between the reboiler residue extraction inlet and the ammonia still residue extraction inlet.

3. The residue discharge device of the ammonia still as claimed in claim 1, wherein the residue discharge inlet of the reboiler, the residue discharge inlet of the ammonia still and the residue discharge tail gas outlet are respectively provided with control valves, the number of each control valve is at least 2, one of the control valves is a common valve, and the other control valves are standby valves.

4. The ammonia still deslagging apparatus of claim 3 wherein said back-up valves are all open.

5. The residue discharge device of the ammonia still according to claim 1, wherein the liquid residue discharge pipeline comprises a plurality of control valves, one of which is a normal valve, and the other of which is a standby valve, and the standby valves are all in an open state.

6. The ammonia still tower slag extractor of claim 1, wherein the ammonia still tower slag extractor has a slag outlet at the bottom.

7. The ammonia still tower slag extractor of claim 1, wherein all the pipe connecting portions of the ammonia still tower slag extractor are connected by flanges.

8. An ammonia still deslagging and tail gas treatment integrated device, which is characterized by comprising the ammonia still deslagging device of any one of claims 1 to 7 and a tail gas purification system, wherein a deslagging tail gas outlet is connected with the tail gas purification system.

9. An ammonia distillation system, comprising an ammonia distillation tower, a reboiler, and the ammonia distillation tower residue discharge system of any one of claims 1 to 7 or the ammonia distillation tower residue discharge and tail gas treatment integrated device of claim 8.

10. The ammonia still system as claimed in claim 9, wherein the ammonia still tower and the reboiler have a residue discharge outlet at the bottom.