CN216367379U

CN216367379U - Amino silane ammonia tail gas recovery processing system

Info

Publication number: CN216367379U
Application number: CN202123150385.4U
Authority: CN
Inventors: 徐天祥; 曾为伟; 宋娟
Original assignee: Suzhou Lvlang Environmental Technology Co ltd
Current assignee: Suzhou Lvlang Environmental Technology Co ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-04-26
Anticipated expiration: 2031-12-15

Abstract

The utility model discloses an amino silane ammonia tail gas recovery processing system, and relates to the technical field of amino silane ammonia tail gas recovery processing. The device comprises a primary washing tower, wherein a secondary pickling tower and an ammonia water collecting kettle are connected to the primary washing tower, a phosphoric acid dosing tank, a centrifugal mother liquor kettle and an induced draft fan are connected to the secondary pickling tower, and the bottom of the centrifugal mother liquor kettle is connected with a centrifugal machine; the primary washing tower and the secondary washing tower are respectively connected with a primary water inlet electric valve and a secondary water inlet electric valve, and one end of the draught fan is connected with an exhaust funnel. The ammonia tail gas is recycled and reused by adopting an integrated combined process, so that the method has the advantages of good economic benefit, high automation degree and stable standard emission, and an effective solution is provided for ammonia tail gas treatment; the ammonia water and ammonium phosphate generated in the ammonia tail gas treatment process can be recycled, and other secondary pollutants are not generated.

Description

Amino silane ammonia tail gas recovery processing system

Technical Field

The utility model belongs to the technical field of amino-silane ammonia tail gas recovery and treatment, and particularly relates to an amino-silane ammonia tail gas recovery and treatment system.

Background

High-concentration ammonia tail gas can be generated in the production process of aminosilane, the aminosilane has the characteristic of being easily soluble in water, if the aminosilane is not treated, the ammonia tail gas is directly discharged into the atmospheric environment through a fan, so that the environment is polluted, and simultaneously, the ammonia gas and rainwater are mixed and discharged into a river to cause a water bloom phenomenon, so that the water ecology is damaged; some ammonia gas is absorbed by adopting water spraying, but the absorption liquid still decomposes and separates out ammonia gas, and secondary pollution (waste water problem) is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a system for recovering and treating amino silane ammonia tail gas, which solves the technical problem that high-concentration ammonia tail gas is generated in the production process of amino silane, is easy to dissolve in water, and can cause environmental pollution if the ammonia tail gas is directly discharged into the atmospheric environment through a fan without being treated.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

an amino silane ammonia tail gas recovery processing system comprises a primary washing tower, wherein a secondary pickling tower and an ammonia water collecting kettle are connected to the primary washing tower, a phosphoric acid dosing tank, a centrifugal mother liquor kettle and an induced draft fan are connected to the secondary pickling tower, and a centrifugal machine is connected to the bottom of the centrifugal mother liquor kettle;

the primary washing tower and the secondary washing tower are respectively connected with a primary water inlet electric valve and a secondary water inlet electric valve, and one end of the draught fan is connected with an exhaust funnel.

Optionally, the upper portions of the first-stage washing tower (2) and the second-stage pickling tower (3) are respectively provided with a packing layer, the bottoms of the first-stage washing tower (2) and the second-stage pickling tower (3) are respectively provided with a return pipeline communicated with the packing layer on the upper portion, the return pipeline on the first-stage washing tower (2) is connected with a first-stage washing pump (111), and the return pipeline on the second-stage pickling tower (3) is connected with a second-stage pickling pump (112).

Optionally, the bottom of the first-stage water washing tower (2) and the second-stage acid washing tower (3) is respectively provided with a water washing tower water tank (113) and a phosphoric acid tower water tank (114), and the phosphoric acid tower water tank (114) is connected with a densimeter (105).

Optionally, a first pH sensor (101) and a first liquid level meter (102) are arranged in the water tank (113) of the water washing tower, and a second liquid level meter (104) and a second pH sensor (103) are arranged in the water tank (114) of the phosphoric acid tower.

Optionally, the phosphoric acid dosing tank (8) and the secondary pickling tower (3) are connected with a phosphoric acid dosing pump (110).

Optionally, a first-stage water drainage electric valve is arranged between the first-stage water washing tower and the ammonia water collection kettle, and a second-stage water drainage electric valve is arranged between the second-stage acid washing tower and the centrifugal mother liquor kettle.

The embodiment of the utility model has the following beneficial effects:

according to the embodiment of the utility model, the ammonia tail gas is recycled and reused by adopting an integrated combined process, so that the economic benefit is good, the automation degree is high, the standard emission is stable, and an effective solution is provided for ammonia tail gas treatment; the ammonia water and ammonium phosphate generated in the ammonia tail gas treatment process can be recycled, and other secondary pollutants are not generated.

Of course, it is not necessary for any product in which the utility model is practiced to achieve all of the above-described advantages at the same time.

Drawings

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

fig. 1 is a schematic structural diagram according to an embodiment of the present invention.

Wherein the figures include the following reference numerals:

1. an induced draft fan; 2. a first-stage water washing tower; 3. a secondary acid washing tower; 4. an exhaust funnel; 5. collecting the ammonia water in a kettle; 6. centrifuging the mother liquor kettle; 7. a centrifuge; 8. a phosphoric acid dosing tank; 101. a first pH sensor; 102. a first liquid level meter; 103. a second pH sensor; 104. a second level gauge; 105. a densitometer; 106. a first stage water inlet electric valve; 107. a first stage drain electric valve; 108. a second stage water inlet electric valve; 109. a second stage drain electric valve; 110. a phosphoric acid dosing pump; 111. a first-stage water washing pump; 112. a secondary acid washing pump; 113 water washing tower water tank; 114 phosphoric acid tower water tank.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses.

To maintain the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known components of the utility model have been omitted.

Referring to fig. 1, in the present embodiment, a system for recycling and processing an amino silane ammonia tail gas is provided, including: the device comprises a primary washing tower 2, wherein the primary washing tower 2 is connected with a secondary pickling tower 3 and an ammonia water collecting kettle 5, the secondary pickling tower 3 is connected with a phosphoric acid dosing tank 8, a centrifugal mother liquor kettle 6 and an induced draft fan 1, and the bottom of the centrifugal mother liquor kettle 6 is connected with a centrifuge 7;

the primary washing tower 2 and the secondary washing tower 3 are respectively connected with a primary water inlet electric valve 106 and a secondary water inlet electric valve 108, and one end of the induced draft fan 1 is connected with an exhaust funnel 4.

The upper parts in the first-stage washing tower (2) and the second-stage pickling tower (3) of the embodiment are respectively provided with a packing layer, the bottoms of the first-stage washing tower (2) and the second-stage pickling tower (3) are respectively provided with a return pipeline communicated with the packing layer on the upper part, the return pipeline on the first-stage washing tower (2) is connected with a first-stage washing pump (111), the return pipeline on the second-stage pickling tower (3) is connected with a second-stage pickling pump (112), a first-stage drainage electric valve (107) is arranged between the first-stage washing tower (2) and an ammonia water collecting kettle (5), a second-stage drainage electric valve (109) is arranged between the second-stage pickling tower (3) and a centrifugal mother liquor kettle (6), the bottom parts in the first-stage washing tower (2) and the second-stage pickling tower (3) are respectively provided with a washing tower water tank (113) and a phosphoric acid tower water tank (114), a first pH sensor (101) and a first liquid level meter (102) are arranged in the washing tower water tank (113), a second liquid level meter (104) and a second pH sensor (103) are arranged in the phosphoric acid tower water tank (114), a densimeter (105) is connected to the phosphoric acid tower water tank (114), and a phosphoric acid dosing tank (8) and the secondary pickling tower (3) are connected with a phosphoric acid dosing pump (110).

The application of one aspect of the embodiment is as follows: the principle is as follows: the ammonia gets into tail gas processing system, firstly gets into one-level water scrubber 2, is spouted to the packing layer by one-level washing pump 111 suction circulation liquid equivalent, accomplishes the gas-liquid mass transfer process, monitors pH value by first pH sensor 101, opens first level drainage motorised valve 107 after pH reaches 11.7, and strong aqueous ammonia discharges into aqueous ammonia collection cauldron 5, as the raw materials retrieval and utilization.

During drainage, the liquid level height of the water tank 113 of the washing tower is monitored by the first liquid level meter 102, the first-stage drainage electric valve 107 is closed after the liquid level reaches the middle liquid level, the first-stage water inlet electric valve 106 is opened, tap water is supplemented, and the water inlet electric valve 106 is closed after the liquid level is recovered to the high liquid level.

After the ammonia tail gas is subjected to primary washing recovery treatment, the ammonia concentration in the tail gas is still high, and the tail gas is difficult to reach the emission standard, so secondary acid absorption is adopted for further treatment.

After being treated by the first-stage water washing tower 2, ammonia gas enters the second-stage acid washing tower 3, and is pumped by the second-stage acid washing pump 112 to be sprayed to the packing layer in equal quantity, so that the gas-liquid mass transfer process is completed, and ammonium phosphate solution is formed. The pH value is monitored by using the second pH sensor 103, and when the pH is higher than 6, the phosphoric acid dosing pump 110 is started, and a phosphoric acid chemical is added from the phosphoric acid dosing tank 8 (storing a 30% phosphoric acid solution) to the phosphoric acid tower water tank 114, and when the pH reaches 3, the phosphoric acid dosing pump 110 is turned off, so that the pH is maintained between 3 and 6. The density of the solution in the phosphoric acid tower water tank 114 is monitored by the densimeter 105, when the density reaches 1.3g/cm3, the second-stage water discharge electric valve 109 is opened, the concentrated solution of ammonium phosphate is discharged into the centrifugal mother liquor kettle 6, the liquid level of the phosphoric acid tower water tank 114 is monitored by the second liquid level meter 104 in the water discharge process, when the liquid level reaches the middle liquid level, the second-stage water discharge electric valve 109 is closed, the second-stage water inlet electric valve 108 is opened, tap water is supplemented, and when the liquid level reaches the high liquid level, the second-stage water inlet electric valve 108 is closed. And after the concentrated ammonium phosphate solution in the centrifugal mother solution kettle 6 is accumulated to a certain amount, starting the centrifugal machine 7, centrifugally separating out ammonium phosphate solid which can be sold as a finished product, and refluxing the centrifugal solution to the water tank 114 of the phosphoric acid tower for reuse. And finally, discharging the purified gas through an exhaust funnel 4 by using a draught fan 1. It should be noted that all the electric devices referred to in this application may be powered by a storage battery or an external power source.

Through the design, the problem of ammonia tail gas emission is well solved. Mainly embodies the following aspects: 1. the ammonia tail gas is recycled by adopting an integrated combined process, so that the method has the advantages of good economic benefit, high automation degree and stable standard emission, and an effective solution is provided for ammonia tail gas treatment; 2. the method implements a green chemical concept, has good atomic economy, can recycle ammonia water and ammonium phosphate generated in the ammonia tail gas treatment process, and does not generate other secondary pollutants.

The above embodiments may be combined with each other.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Claims

1. The system for recovering and treating the amino silane ammonia tail gas is characterized by comprising: the device comprises a primary washing tower (2), wherein the primary washing tower (2) is connected with a secondary pickling tower (3) and an ammonia water collecting kettle (5), the secondary pickling tower (3) is connected with a phosphoric acid dosing tank (8), a centrifugal mother liquor kettle (6) and a draught fan (1), and the bottom of the centrifugal mother liquor kettle (6) is connected with a centrifugal machine (7);

the primary washing tower (2) and the secondary washing tower (3) are respectively connected with a primary water inlet electric valve (106) and a secondary water inlet electric valve (108), and one end of the draught fan (1) is connected with an exhaust funnel (4).

2. The system for recovering and treating the amino silane ammonia tail gas as claimed in claim 1, wherein the upper parts of the primary water washing tower (2) and the secondary pickling tower (3) are respectively provided with a packing layer, the bottoms of the primary water washing tower (2) and the secondary pickling tower (3) are respectively provided with a return pipeline communicated with the packing layer on the upper part, the return pipeline on the primary water washing tower (2) is connected with a primary water washing pump (111), and the return pipeline on the secondary pickling tower (3) is connected with a secondary pickling pump (112).

3. The system for recycling and treating the tail gas of the amino silane and the ammonia according to claim 1, wherein a water tank (113) of the water washing tower and a water tank (114) of the phosphoric acid tower are respectively arranged at the bottom of the primary water washing tower (2) and the secondary acid washing tower (3), and a densimeter (105) is connected to the water tank (114) of the phosphoric acid tower.

4. The system for recycling and treating amino silane ammonia tail gas as claimed in claim 3, wherein a first pH sensor (101) and a first liquid level meter (102) are arranged in the water tank (113) of the water washing tower, and a second liquid level meter (104) and a second pH sensor (103) are arranged in the water tank (114) of the phosphoric acid tower.

5. The system for recovering and treating the amino silane ammonia tail gas as claimed in claim 1, wherein a phosphoric acid dosing tank (8) and the secondary acid washing tower (3) are connected with a phosphoric acid dosing pump (110).

6. The system for recovering and treating the tail gas of the amino silane ammonia as claimed in claim 1, wherein a first stage water discharge electric valve (107) is arranged between the primary water washing tower (2) and the ammonia water collection kettle (5), and a second stage water discharge electric valve (109) is arranged between the secondary acid washing tower (3) and the centrifugal mother liquor kettle (6).