CN110538559B - Waste gas treatment process for workshop discharge in biopharmaceutical industry - Google Patents
Waste gas treatment process for workshop discharge in biopharmaceutical industry Download PDFInfo
- Publication number
- CN110538559B CN110538559B CN201910841771.6A CN201910841771A CN110538559B CN 110538559 B CN110538559 B CN 110538559B CN 201910841771 A CN201910841771 A CN 201910841771A CN 110538559 B CN110538559 B CN 110538559B
- Authority
- CN
- China
- Prior art keywords
- gas
- ammonia
- waste gas
- hydrogen sulfide
- concentration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/28—Selection of materials for use as drying agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/76—Gas phase processes, e.g. by using aerosols
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/20—Sulfides; Polysulfides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/103—Water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/20—Organic adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
Abstract
The invention discloses a waste gas treatment process discharged from a workshop in the biopharmaceutical industry, which comprises the steps of collecting and pretreating waste gas, removing organic waste gas, enriching acid-base gas, recycling acid-base gas and treating tail gas, firstly dedusting and drying the waste gas, then the adsorption resin is used for carrying out adsorption treatment on various organic waste gases in the waste gases, then the air in the waste gases is removed through the processes of activated carbon adsorption and desorption, meanwhile, the enrichment of hydrogen sulfide and ammonia in the discharged waste gas can be realized through the adsorption and desorption of the activated carbon, the mixed gas of the ammonia, nitrogen and hydrogen sulfide gas formed after desorption is introduced into the crystallization reaction kettle before, the proportion of the ammonia gas and the hydrogen sulfide gas is adjusted by supplementing the ammonia gas, so that the final product of the reaction of the ammonia gas and the hydrogen sulfide gas is ammonium sulfide, and the product obtained by treating the waste gas can be utilized.
Description
Technical Field
The invention belongs to the technical field of process waste gas treatment, and particularly relates to a waste gas treatment process for workshop discharge in the biopharmaceutical industry.
Background
The pharmaceutical industry is an important part of national economy, is closely related to the life health of people, and in the pharmaceutical industry, drugs can be divided into two major categories, namely biological drugs and synthetic drugs, according to drug sources, wherein the biological drugs refer to drugs for treatment, prevention and diagnosis produced by applying technologies such as microbiology, biology, medicine, biochemistry and the like, and specifically, in the biological drugs, the drugs can be divided into various categories such as fermentation drugs, extraction drugs and the like according to the production process of the drugs and different raw materials and the like, wherein the extraction drugs refer to extraction with animals and plants as raw materials, the main pollution of the extraction drugs is organic pollutants, the fermentation drugs refer to a method for producing antibiotics and other active ingredients by a fermentation method, and then obtaining a final product by separation, purification and refining methods.
The pollutant emissions of the fermentation pharmacy mainly include waste water discharge and waste gas discharge, wherein the waste gas pollution mainly includes malodorous ammonia gas, fermentation waste gas mainly containing hydrogen sulfide, and multiple types of organic solvent volatile matters generated in the subsequent medicine refining process, and also includes high-concentration dust and peculiar smell generated by hypha fermentation, and the peculiar smell substances are one of the most diseased problems in the biological medicine production.
Disclosure of Invention
The invention aims to provide a waste gas treatment process for workshop discharge in the biopharmaceutical industry.
The technical problems to be solved by the invention are as follows:
1. in the fermentation bio-pharmaceuticals process, can produce the fermentation waste gas that uses hydrogen sulfide and ammonia as the owner and the various organic waste gas of kind that produces in the refining process, because the bio-pharmaceuticals collects the emission for waste gas is unified, therefore the exhaust gas of workshop is the gas mixture of multiple gas, and this gas mixture still has higher dust content, how to handle each harmful substance in the waste gas, reduces the harm of fermentation pharmacy to the environment, is one of the problem that needs to solve at present.
2. The activated carbon has good adsorption capacity due to a loose and porous structure, but has poor adsorption effect on the waste gas generated in the fermentation biopharmaceutical process, such as hydrogen sulfide, ammonia gas and other polar compounds with small molecular weight, and cannot realize good adsorption effect.
3. In the prior art, the treatment of the mixed gas of ammonia gas and hydrogen sulfide is mainly carried out through water absorption treatment, however, after the ammonia gas and the hydrogen sulfide gas are absorbed by the water, at least one of ammonium sulfide and ammonium bisulfide is generated through reaction, the two substances are both dissolved in water, and the ammonium bisulfide is easy to decompose and is inconvenient for subsequent treatment.
The purpose of the invention can be realized by the following technical scheme:
a waste gas treatment process for workshop discharge in the biopharmaceutical industry comprises the following steps:
step one, collecting and pretreating waste gas
Collecting waste gas generated in a production workshop through micro negative pressure generated by a high-pressure fan, transmitting the waste gas to a dust remover through a pipeline for treatment, removing solid particles in the waste gas by the dust remover, and removing organic waste gas after the workshop waste gas without the solid particles is dehydrated and dried by a dehydrating molecular sieve;
step two, organic waste gas removal
The workshop waste gas obtained through the treatment in the previous step is firstly introduced into first organic adsorption equipment, hydrophobic organic adsorption resin is filled in the first organic adsorption equipment, the hydrophobic organic adsorption resin can adsorb hydrophobic organic matters in the workshop waste gas, and the workshop waste gas treated by the first organic adsorption equipment is transmitted to second organic adsorption equipment for treatment, wherein hydrophilic organic adsorption resin is filled in the second organic adsorption equipment, and the hydrophilic organic adsorption resin can adsorb hydrophilic organic matters in the workshop waste gas;
the first organic adsorption equipment is an adsorption column filled with hydrophobic organic adsorption resin;
the second organic adsorption equipment is an adsorption column filled with hydrophobic organic adsorption resin;
the hydrophobic organic matter adsorption resin is type 01 or DM-7HP or LK-30G resin of Aimeike Jian (China) biological medicine limited company;
the hydrophilic organic adsorption resin is 02 or 03 or LK73 or LK04 or DM28 model resin of Aimejian (Chinese) biological medicine limited company;
step three, enrichment of acid and alkali gases
The workshop waste gas which is treated in the previous step and is removed of organic gas components is transmitted to an activated carbon adsorption box, modified activated carbon is filled in the activated carbon adsorption box, ammonia and hydrogen sulfide in the workshop waste gas are adsorbed and recovered through the modified activated carbon, and the workshop waste gas is discharged into the atmosphere after being adsorbed by the activated carbon adsorption box and reaching the emission standard;
step four, recycling acid and alkali gases
When the activated carbon adsorption tank reaches a preset adsorption amount, the second organic adsorption equipment stops continuously inputting workshop waste gas into the activated carbon adsorption tank, meanwhile, a nitrogen source transmits nitrogen to a gas heating device through a pipeline, the gas heating device transmits the heated nitrogen to the activated carbon adsorption tank, the activated carbon is heated through hot nitrogen, so that hydrogen sulfide and ammonia in the activated carbon are desorbed, mixed gas of the hydrogen sulfide, the ammonia and the nitrogen formed after desorption is subjected to heat exchange and cooling through a heat exchanger and then is transmitted to a crystallization reaction kettle for reaction and crystallization, the waste gas treated by the crystallization reaction kettle mainly comprises the nitrogen and excessive ammonia which is not completely reacted, and the waste gas is transmitted to an ammonia absorption tower for further treatment;
the heat absorbed by the heat exchanger is transmitted between the nitrogen source and the gas heating device, and the hot nitrogen which is about to enter the gas heating device is preheated, so that the energy is saved;
an ammonia gas source is connected to a pipeline between the heat exchanger and the crystallization reaction kettle, and the ammonia gas source is used for supplementing ammonia gas to the mixed gas entering the crystallization reaction kettle;
a first ammonia gas concentration detection device and a first hydrogen sulfide gas concentration detection device are installed on a pipeline between the activated carbon adsorption tank and the heat exchanger, a second ammonia gas concentration detection device and a second hydrogen sulfide gas concentration detection device are installed at an air inlet of the crystallization reaction kettle, wherein the first ammonia gas concentration detection device is used for detecting the concentration of ammonia gas in the mixed gas desorbed from the activated carbon adsorption tank, the second ammonia gas concentration detection device is used for detecting the concentration of ammonia gas in the mixed gas entering the crystallization reaction kettle, the first hydrogen sulfide gas concentration detection device is used for detecting the concentration of hydrogen sulfide gas in the mixed gas desorbed from the activated carbon adsorption tank, the second hydrogen sulfide gas concentration detection device is used for detecting the concentration of hydrogen sulfide gas in the mixed gas entering the crystallization reaction kettle, and after the ammonia gas concentration detection device and the hydrogen sulfide gas detection device detect the concentration of corresponding gas in the mixed gas, transmitting the concentration data to a controller, and controlling the speed of the ammonia source make-up gas by the controller according to the collected ammonia concentration data and the collected hydrogen sulfide gas concentration data;
a flow equalizer is arranged between the ammonia source and the crystallization reaction kettle, so that ammonia gas supplemented by the ammonia source is uniformly mixed in the mixed gas, and the accuracy of ammonia gas concentration data and hydrogen sulfide gas concentration data detected at an air inlet of the crystallization reaction kettle is improved;
step five, tail gas treatment
And (2) discharging the waste gas treated by the crystallization reaction kettle into an ammonia absorption tower, wherein water sprayed from top to bottom is arranged in the ammonia absorption tower, tail gas discharged by the crystallization reaction kettle moves from bottom to top in a waste gas purification tower, and the ammonia in the waste gas is adsorbed and recovered by the water, so that the treatment of the waste gas discharged from the biological pharmaceutical workshop is completed.
The active carbon has good adsorption capacity due to a loose and porous structure, but has poor adsorption effect on polar compounds with small molecular weight such as hydrogen sulfide and ammonia gas, so that the active carbon needs to be modified to meet the adsorption effect on the ammonia gas and the hydrogen sulfide;
the preparation method of the modified activated carbon in the fourth step comprises the following steps:
adding industrial activated carbon into sodium hydroxide aqueous solution, oscillating at constant temperature of 25-30 ℃ for 10-15h, and standing for 10-12 h;
filtering and separating the activated carbon and a sodium hydroxide aqueous solution, washing the industrial activated carbon with deionized water to be neutral, and drying at a temperature below 105 ℃ to obtain modified activated carbon;
the mass concentration of the sodium hydroxide aqueous solution is 40-45%;
in the step, the active carbon is treated by the sodium hydroxide aqueous solution, so that the total acidity of the surface of the active carbon is reduced, and the adsorption capacity of the active carbon on ammonia gas and hydrogen sulfide gas is improved.
The specific method for controlling the ammonia gas supplementing speed of the ammonia gas source by the controller is as follows;
SS1, a first ammonia concentration detection device and a first hydrogen sulfide gas concentration detection device respectively detect ammonia concentration A in mixed gas desorbed from an activated carbon adsorption box1With hydrogen sulfide gas concentration B1The second ammonia gas concentration detection device and the second hydrogen disulfide gas are concentratedThe ammonia concentration A at the air inlet of the crystallization reaction kettle is respectively detected by the degree detection device2With hydrogen sulfide gas concentration B2And transmitting the detection result to the controller;
SS2, comparing the concentration of ammonia gas with the concentration of hydrogen sulfide gas by the controller;
when 2B1≥A1When the ammonia concentration A is detected, the controller controls the valve of the ammonia source to be opened to a preset opening degree, and the ammonia concentration A is detected after the preset time2With hydrogen sulfide gas concentration B2Comparing;
if 2B2+α＞A2＞2B2Stopping adjusting the opening of the valve of the ammonia source;
if 2B2≥A2Increasing the opening of the valve of the ammonia gas source until 2B2+α＞A2＞2B2When alpha is a preset value, stopping adjusting the opening of the valve of the ammonia source;
if A2≥2B2+ alpha, the controller controls the valve of the ammonia gas source to reduce the opening;
when 2B1＜A1When the control is not needed, the controller does not perform control adjustment;
when 2B1=A1In the process, the opening degree of a valve of an ammonia gas source is increased until 2B2+α＞A2＞2B2When alpha is a preset value, stopping adjusting the opening of the valve of the ammonia source;
the proportion of ammonia gas and hydrogen sulfide gas in the mixed gas entering the crystallization reaction kettle is adjusted, so that the crystallization product in the crystallization reaction kettle is ammonium sulfide instead of ammonium hydrogen sulfide, and the stability of the product is improved;
the crystallization reaction kettle comprises a kettle body, wherein the bottom of the kettle body is communicated with an air inlet pipe, the top of the kettle body is communicated with an air outlet pipe, a gas phase flow equalizer, a cooling device and a crystallization device are further arranged in the kettle body, mixed gas to be reacted enters the kettle body through the air inlet pipe and then reacts and crystallizes, and residual gas is discharged out of the kettle body through the air outlet pipe;
the gas phase flow equalizer is arranged above the gas inlet pipe and used for uniformly dispersing mixed gas introduced by the gas inlet pipe, the cooling device is arranged above the gas phase flow equalizer and used for cooling the mixed gas passing through the cooling device, and in one embodiment of the invention, the cooling device is a liquid nitrogen cooling device;
a plurality of groups of crystallization devices are arranged above the cooling device, a certain gap is reserved between every two adjacent groups of crystallization devices, the two adjacent groups of crystallization devices are not in contact with each other, the two adjacent groups of crystallization devices are arranged in a crossed manner, and when the airflow moves from bottom to top in the kettle body, the airflow moves upwards in an S shape;
the crystallization device comprises a supporting plate and a plurality of crystallization columns arranged on one surface or two surfaces of the supporting plate, each crystallization column comprises a rod core and silk threads arranged on the rod core, and the crystallization device provides a rough crystallization surface for reactants of ammonia gas and hydrogen sulfide gas.
The invention has the beneficial effects that:
1. the treatment process of the invention firstly removes dust and dries the waste gas, then adsorbs and treats various organic waste gases in the waste gas through hydrophilic organic matter adsorption resin and hydrophobic organic matter adsorption resin, in this step, the main pollution components in the waste gas also include ammonia gas and hydrogen sulfide with strong peculiar smell, because the reaction product of the hydrogen sulfide and the ammonia gas is ammonium sulfide and ammonium hydrosulfide according to different proportions, wherein the ammonium sulfide can be rapidly oxidized in the air to generate sulfide and thiosulfate, the ammonium hydrosulfide is an unstable and easily decomposed compound, therefore, in the waste gas treatment process, besides the waste gas treatment, the waste gas treatment product also needs to be considered, the secondary pollution caused by the waste gas treatment product is avoided, and the air in the waste gas is removed through the processes of activated carbon adsorption and desorption, prevent that the air from causing the influence to follow-up reaction, simultaneously, can carry out the enrichment to hydrogen sulfide and ammonia in the emission waste gas through active carbon adsorption desorption, the ammonia that forms after the desorption, the mixed gas of nitrogen gas and hydrogen sulfide gas is before letting in crystallization reation kettle, replenish the ammonia through controller control, adjust the proportion between ammonia and the hydrogen sulfide gas, the end product that makes ammonia and hydrogen sulfide gas reaction is ammonium sulfide and non-unstable ammonium hydrosulfide, and because having got rid of the air in the step before, the ammonium sulfide that the reaction produced can not oxidize, existence that can be stable, thereby make the product that exhaust-gas treatment obtained can obtain utilizing.
2. According to the invention, the active carbon is treated by the sodium hydroxide aqueous solution in the active carbon adsorption box, so that the total acidity of the surface of the active carbon is reduced, the adsorption capacity of the active carbon on ammonia gas and hydrogen sulfide gas is improved, and the active carbon adsorption box can effectively absorb the ammonia gas and the hydrogen sulfide gas in the waste gas.
3. The threads on the crystallization column in the crystallization device provide an attachment surface for crystallization, and the cooled mixed gas is crystallized on the surface of the threads on the crystallization column, so that hydrogen sulfide gas and ammonia gas are removed, and ammonium sulfide is obtained as a product, thereby realizing the recycling of the ammonia gas and the hydrogen sulfide gas in the waste gas.
Drawings
The invention is described in further detail below with reference to the figures and specific embodiments.
FIG. 1 is a flow diagram of an effluent treatment process according to the present invention;
FIG. 2 is a schematic structural diagram of a crystallization reactor.
Detailed Description
The technical solutions in the embodiments of the present invention 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 invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A waste gas treatment process discharged from a workshop in the biopharmaceutical industry is shown in figure 1 and comprises the following steps:
step one, collecting and pretreating waste gas
Collecting waste gas generated in a production workshop through micro negative pressure generated by a high-pressure fan, transmitting the waste gas to a dust remover through a pipeline for treatment, removing solid particles in the waste gas by the dust remover, and removing organic waste gas after the workshop waste gas without the solid particles is dehydrated and dried by a dehydrating molecular sieve;
step two, organic waste gas removal
The workshop waste gas obtained through the treatment in the previous step is firstly introduced into first organic adsorption equipment, hydrophobic organic adsorption resin is filled in the first organic adsorption equipment, the hydrophobic organic adsorption resin can adsorb hydrophobic organic matters in the workshop waste gas, and the workshop waste gas treated by the first organic adsorption equipment is transmitted to second organic adsorption equipment for treatment, wherein hydrophilic organic adsorption resin is filled in the second organic adsorption equipment, and the hydrophilic organic adsorption resin can adsorb hydrophilic organic matters in the workshop waste gas;
the first organic adsorption equipment is an adsorption column filled with hydrophobic organic adsorption resin;
the second organic adsorption equipment is an adsorption column filled with hydrophobic organic adsorption resin;
the hydrophobic organic matter adsorption resin is DM-7HP type resin of Aimeikejian (China) biological medicine limited company;
the hydrophilic organic matter adsorption resin is 03 type resin of Aimejian (China) biological medicine limited company;
step three, enrichment of acid and alkali gases
The workshop waste gas which is treated in the previous step and is removed of organic gas components is transmitted to an activated carbon adsorption box, modified activated carbon is filled in the activated carbon adsorption box, ammonia and hydrogen sulfide in the workshop waste gas are adsorbed and recovered through the modified activated carbon, and the workshop waste gas is discharged into the atmosphere after being adsorbed by the activated carbon adsorption box and reaching the emission standard;
step four, recycling acid and alkali gases
When the activated carbon adsorption tank reaches a preset adsorption amount, the second organic adsorption equipment stops continuously inputting workshop waste gas into the activated carbon adsorption tank, meanwhile, a nitrogen source transmits nitrogen to a gas heating device through a pipeline, the gas heating device transmits the heated nitrogen to the activated carbon adsorption tank, the activated carbon is heated through hot nitrogen, so that hydrogen sulfide and ammonia in the activated carbon are desorbed, mixed gas of the hydrogen sulfide, the ammonia and the nitrogen formed after desorption is subjected to heat exchange and cooling through a heat exchanger and then is transmitted to a crystallization reaction kettle for reaction and crystallization, the waste gas treated by the crystallization reaction kettle mainly comprises the nitrogen and excessive ammonia which is not completely reacted, and the waste gas is transmitted to an ammonia absorption tower for further treatment;
the heat absorbed by the heat exchanger is transmitted between the nitrogen source and the gas heating device, and the hot nitrogen which is about to enter the gas heating device is preheated, so that the energy is saved;
an ammonia gas source is connected to a pipeline between the heat exchanger and the crystallization reaction kettle, and the ammonia gas source is used for supplementing ammonia gas to the mixed gas entering the crystallization reaction kettle;
a first ammonia gas concentration detection device and a first hydrogen sulfide gas concentration detection device are installed on a pipeline between the activated carbon adsorption tank and the heat exchanger, a second ammonia gas concentration detection device and a second hydrogen sulfide gas concentration detection device are installed at an air inlet of the crystallization reaction kettle, wherein the first ammonia gas concentration detection device is used for detecting the concentration of ammonia gas in the mixed gas desorbed from the activated carbon adsorption tank, the second ammonia gas concentration detection device is used for detecting the concentration of ammonia gas in the mixed gas entering the crystallization reaction kettle, the first hydrogen sulfide gas concentration detection device is used for detecting the concentration of hydrogen sulfide gas in the mixed gas desorbed from the activated carbon adsorption tank, the second hydrogen sulfide gas concentration detection device is used for detecting the concentration of hydrogen sulfide gas in the mixed gas entering the crystallization reaction kettle, and after the ammonia gas concentration detection device and the hydrogen sulfide gas detection device detect the concentration of corresponding gas in the mixed gas, transmitting the concentration data to a controller, and controlling the speed of the ammonia source make-up gas by the controller according to the collected ammonia concentration data and the collected hydrogen sulfide gas concentration data;
a flow equalizer is arranged between the ammonia source and the crystallization reaction kettle, so that ammonia gas supplemented by the ammonia source is uniformly mixed in the mixed gas;
step five, tail gas treatment
And (2) discharging the waste gas treated by the crystallization reaction kettle into an ammonia absorption tower, wherein water sprayed from top to bottom is arranged in the ammonia absorption tower, tail gas discharged by the crystallization reaction kettle moves from bottom to top in a waste gas purification tower, and the ammonia in the waste gas is adsorbed and recovered by the water, so that the treatment of the waste gas discharged from the biological pharmaceutical workshop is completed.
The preparation method of the modified activated carbon in the fourth step comprises the following steps:
adding industrial activated carbon into sodium hydroxide aqueous solution, oscillating at constant temperature of 25-30 ℃ for 10-15h, and standing for 10-12 h;
filtering and separating the activated carbon and a sodium hydroxide aqueous solution, washing the industrial activated carbon with deionized water to be neutral, and drying at a temperature below 105 ℃ to obtain modified activated carbon;
the mass concentration of the sodium hydroxide aqueous solution is 40-45%;
in the step, the active carbon is treated by the sodium hydroxide aqueous solution, so that the total acidity of the surface of the active carbon is reduced, and the adsorption capacity of the active carbon on ammonia gas and hydrogen sulfide gas is improved.
The specific method for controlling the ammonia gas supplementing speed of the ammonia gas source by the controller is as follows;
SS1, a first ammonia concentration detection device and a first hydrogen sulfide gas concentration detection device respectively detect ammonia concentration A in mixed gas desorbed from an activated carbon adsorption box1With hydrogen sulfide gas concentration B1The second ammonia gas concentration detection device and the second hydrogen disulfide gas concentration detection device respectively detect the ammonia gas concentration A at the air inlet of the crystallization reaction kettle2With hydrogen sulfide gas concentration B2And transmitting the detection result to the controller;
SS2, comparing the concentration of ammonia gas with the concentration of hydrogen sulfide gas by the controller;
when 2B1≥A1When the ammonia concentration A is detected, the controller controls the valve of the ammonia source to be opened to a preset opening degree, and the ammonia concentration A is detected after the preset time2With hydrogen sulfide gas concentration B2Comparing;
if 2B2+α＞A2＞2B2Stopping adjusting the opening of the valve of the ammonia source;
if 2B2≥A2Increasing the opening of the valve of the ammonia gas source until 2B2+α＞A2＞2B2When alpha is a preset value, stopping adjusting the opening of the valve of the ammonia source;
if A2≥2B2+ alpha, the controller controls the valve of the ammonia gas source to reduce the opening;
when 2B1＜A1When the control is not needed, the controller does not perform control adjustment;
when 2B1=A1In the process, the opening degree of a valve of an ammonia gas source is increased until 2B2+α＞A2＞2B2When alpha is a preset value, stopping adjusting the opening of the valve of the ammonia source;
the proportion of ammonia gas and hydrogen sulfide gas in the mixed gas entering the crystallization reaction kettle is adjusted, so that the crystallization product in the crystallization reaction kettle is ammonium sulfide instead of ammonium hydrogen sulfide, and the stability of the product is improved;
as shown in fig. 2, the crystallization reaction kettle comprises a kettle body 1, wherein the bottom of the kettle body 1 is communicated with an air inlet pipe 11, the top of the kettle body 1 is communicated with an air outlet pipe 12, and a gas phase flow equalizer 2, a cooling device 3 and a crystallization device 4 are further arranged in the kettle body 1;
the gas phase current equalizer 2 is arranged above the gas inlet pipe 11 and used for uniformly dispersing mixed gas introduced by the gas inlet pipe 11, and the cooling device 3 is arranged above the gas phase current equalizer 2 and used for cooling the mixed gas passing through, in one embodiment of the invention, the cooling device 3 is a liquid nitrogen cooling device;
a plurality of groups of crystallization devices 4 are arranged above the cooling device, a certain gap is reserved between every two adjacent groups of crystallization devices 4, the two adjacent groups of crystallization devices 4 are not in contact with each other, the two adjacent groups of crystallization devices 4 are arranged in a crossed manner, and when the airflow moves from bottom to top in the kettle body 1, the airflow moves upwards in an S shape;
the crystallization device 4 comprises a supporting plate 8 and a plurality of crystallization columns 5 arranged on one surface or two surfaces of the supporting plate 8, each crystallization column 5 comprises a rod core 7 and silk threads 6 arranged on the rod core 7, and the crystallization device 4 provides a rough crystallization surface for reactants of ammonia gas and hydrogen sulfide gas.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
Claims (7)
1. The technology for treating the waste gas discharged outside the workshop in the biopharmaceutical industry is characterized by comprising the following steps of:
step one, collecting and pretreating waste gas
Collecting waste gas generated in a production workshop through micro negative pressure generated by a high-pressure fan, transmitting the waste gas to a dust remover through a pipeline for treatment, removing solid particles in the waste gas by the dust remover, and removing organic waste gas after the workshop waste gas without the solid particles is dehydrated and dried by a dehydrating molecular sieve;
step two, organic waste gas removal
The workshop waste gas obtained through the treatment in the previous step is firstly introduced into first organic adsorption equipment, hydrophobic organic adsorption resin is filled in the first organic adsorption equipment, the hydrophobic organic adsorption resin can adsorb hydrophobic organic matters in the workshop waste gas, the workshop waste gas treated by the first organic adsorption equipment is transmitted to second organic adsorption equipment for treatment, hydrophilic organic adsorption resin is filled in the second organic adsorption equipment, and the hydrophilic organic adsorption resin can adsorb hydrophilic organic matters in the workshop waste gas;
step three, enrichment of acid and alkali gases
The workshop waste gas which is treated in the previous step and is removed of organic gas components is transmitted to an activated carbon adsorption box, modified activated carbon is filled in the activated carbon adsorption box, ammonia and hydrogen sulfide in the workshop waste gas are adsorbed and recovered through the modified activated carbon, and the workshop waste gas is discharged into the atmosphere after being adsorbed by the activated carbon adsorption box and reaching the emission standard;
step four, recycling acid and alkali gases
When the activated carbon adsorption tank reaches the preset adsorption quantity, the second organic adsorption equipment stops continuously inputting the workshop waste gas into the activated carbon adsorption tank, meanwhile, the nitrogen source transmits nitrogen to the gas heating device through a pipeline, the gas heating device heats the nitrogen and transmits the nitrogen to the activated carbon adsorption tank, the active carbon is heated by hot nitrogen, so that hydrogen sulfide and ammonia in the active carbon are desorbed, the mixed gas of the hydrogen sulfide, the ammonia and the nitrogen formed after desorption is subjected to heat exchange and temperature reduction by a heat exchanger, and is transmitted to a crystallization reaction kettle for reaction and crystallization, an ammonia gas source is connected to a pipeline between the heat exchanger and the crystallization reaction kettle, the ammonia gas source is used for supplementing ammonia gas to the mixed gas entering the crystallization reaction kettle, the waste gas treated by the crystallization reaction kettle mainly comprises nitrogen and excessive ammonia gas which is not completely reacted, and the waste gas is transmitted to an ammonia gas absorption tower for further treatment;
step five, tail gas treatment
And (2) discharging the waste gas treated by the crystallization reaction kettle into an ammonia absorption tower, wherein water sprayed from top to bottom is arranged in the ammonia absorption tower, tail gas discharged by the crystallization reaction kettle moves from bottom to top in a waste gas purification tower, and the ammonia in the waste gas is adsorbed and recovered by the water, so that the treatment of the waste gas discharged from the biological pharmaceutical workshop is completed.
2. The exhaust gas treatment process discharged from the biopharmaceutical industry workshop, according to claim 1, wherein the heat absorbed by the heat exchanger is transferred between a nitrogen source and the gas heating device to preheat hot nitrogen gas to be introduced into the gas heating device.
3. The waste gas treatment process discharged from the biological pharmaceutical industry workshop according to claim 1, wherein a flow equalizer is installed between the ammonia gas source and the crystallization reaction kettle.
4. The process for treating the waste gas discharged from the workshop of the biopharmaceutical industry according to claim 1, wherein the preparation method of the modified activated carbon in the fourth step comprises the following steps:
adding industrial activated carbon into a sodium hydroxide aqueous solution with the mass concentration of 40-45%, oscillating at the constant temperature of 25-30 ℃ for 10-15h, and standing for 10-12 h;
after the activated carbon and the sodium hydroxide aqueous solution are filtered and separated, the industrial activated carbon is washed to be neutral by deionized water, and dried at the temperature below 105 ℃ to obtain the modified activated carbon.
5. The process for treating the exhaust gas discharged from the workshop in the biopharmaceutical industry according to claim 1, wherein a first ammonia concentration detection device and a first hydrogen sulfide gas concentration detection device are installed on a pipeline between the activated carbon adsorption tank and the heat exchanger, a second ammonia concentration detection device and a second hydrogen sulfide gas concentration detection device are installed at an air inlet of the crystallization reaction kettle, wherein the first ammonia concentration detection device is used for detecting the concentration of ammonia in the mixed gas desorbed from the activated carbon adsorption tank, the second ammonia concentration detection device is used for detecting the concentration of ammonia in the mixed gas entering the crystallization reaction kettle, the first hydrogen sulfide gas concentration detection device is used for detecting the concentration of hydrogen sulfide gas in the mixed gas desorbed from the activated carbon adsorption tank, the second hydrogen sulfide gas concentration detection device is used for detecting the concentration of hydrogen sulfide gas in the mixed gas entering the crystallization reaction kettle, and after the ammonia gas concentration detection device and the hydrogen sulfide gas detection device detect the concentration of the corresponding gas in the mixed gas, the concentration data is transmitted to the controller, and the controller controls the speed of the ammonia gas source for supplementing the gas according to the collected ammonia gas concentration data and the collected hydrogen sulfide gas concentration data.
6. The waste gas treatment process discharged from the workshop of the biopharmaceutical industry according to claim 5, wherein the specific method for controlling the ammonia gas supplementing speed of the ammonia gas source by the controller comprises the following steps:
SS1, a first ammonia concentration detection device and a first hydrogen sulfide gas concentration detection device respectively detect ammonia concentration A in mixed gas desorbed from an activated carbon adsorption box1With hydrogen sulfide gas concentration B1The second ammonia gas concentration detection device and the second hydrogen disulfide gas concentration detection device respectively detect the ammonia gas concentration A at the air inlet of the crystallization reaction kettle2With hydrogen sulfide gas concentration B2And transmitting the detection result to the controller;
SS2, comparing the concentration of ammonia gas with the concentration of hydrogen sulfide gas by the controller;
when 2B1≥A1When the ammonia concentration A is detected, the controller controls the valve of the ammonia source to be opened to a preset opening degree, and the ammonia concentration A is detected after the preset time2With hydrogen sulfide gas concentration B2Comparing;
if 2B2+α＞A2＞2B2Stopping adjusting the opening of the valve of the ammonia source;
if 2B2≥A2Increasing the opening of the valve of the ammonia gas source until 2B2+α＞A2＞2B2When alpha is a preset value, stopping adjusting the opening of the valve of the ammonia source;
if A2≥2B2+ alpha, the controller controls the valve of the ammonia gas source to reduce the opening;
when 2B1＜A1When the control is not needed, the controller does not perform control adjustment;
when 2B1=A1In the process, the opening degree of a valve of an ammonia gas source is increased until 2B2+α＞A2＞2B2And stopping adjusting the opening of the valve of the ammonia source when alpha is a preset value.
7. The waste gas treatment process discharged outside the biological pharmaceutical industry workshop according to claim 1, wherein the crystallization reaction kettle comprises a kettle body (1), the bottom of the kettle body (1) is communicated with a gas inlet pipe (11), the top of the kettle body (1) is communicated with a gas outlet pipe (12), and a gas phase flow equalizer (2), a cooling device (3) and a crystallization device (4) are installed inside the kettle body (1);
the gas phase current equalizer (2) is arranged above the gas inlet pipe (11), and the cooling device (3) is arranged above the gas phase current equalizer (2);
a plurality of groups of crystallization devices (4) are arranged above the cooling device, a gap is reserved between every two adjacent groups of crystallization devices (4), the two adjacent groups of crystallization devices (4) are arranged in a crossed manner, and airflow moves from bottom to top in an S shape in the kettle body (1);
the crystallizing device (4) comprises a supporting plate (8) and a plurality of crystallizing columns (5) arranged on one surface or two surfaces of the supporting plate (8), wherein each crystallizing column (5) comprises a rod core (7) and silk threads (6) arranged on the rod core (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910841771.6A CN110538559B (en) | 2019-09-06 | 2019-09-06 | Waste gas treatment process for workshop discharge in biopharmaceutical industry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910841771.6A CN110538559B (en) | 2019-09-06 | 2019-09-06 | Waste gas treatment process for workshop discharge in biopharmaceutical industry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110538559A CN110538559A (en) | 2019-12-06 |
| CN110538559B true CN110538559B (en) | 2020-12-15 |
Family
ID=68712731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910841771.6A Active CN110538559B (en) | 2019-09-06 | 2019-09-06 | Waste gas treatment process for workshop discharge in biopharmaceutical industry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110538559B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115888320A (en) * | 2023-01-31 | 2023-04-04 | 广东名桂环保有限公司 | Chlorine-containing organic waste gas treatment process |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101816894A (en) * | 2009-02-27 | 2010-09-01 | 中山大学 | Method and device for deodorization by coupled catalytic oxidation |
| US8529852B2 (en) * | 2010-06-28 | 2013-09-10 | Baoquan Zhang | Flue-gas purification and reclamation system and method thereof |
| CN103566725B (en) * | 2013-10-15 | 2016-03-02 | 中国科学院过程工程研究所 | A kind of circulating fluid bed semi-drying method combined desulfurization and denitration mercury removal device and method |
| CN103816782A (en) * | 2014-01-26 | 2014-05-28 | 河北欧美环境工程有限公司 | Photolytic catalytic purification device and corresponding process for treating pharmaceutical waste gas |
| CN104307473B (en) * | 2014-10-21 | 2016-04-20 | 同济大学 | A kind of preparation method of the absorption visible light catalytic material for air pollution treatment |
| CN205699883U (en) * | 2016-03-31 | 2016-11-23 | 华南理工大学 | A kind of small movable dedusting absorption integrated apparatus |
-
2019
- 2019-09-06 CN CN201910841771.6A patent/CN110538559B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110538559A (en) | 2019-12-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103272838B (en) | Method and device for repairing contaminated soil with persistent organic pollutants | |
| CN206709101U (en) | A kind of device of heat accumulation type thermal oxidation stove processing volatile organic waste gas | |
| JP7075910B2 (en) | Acid gas treatment | |
| CN108993113B (en) | Multi-process combined system and method for treating organic waste gas odor | |
| CN203853005U (en) | VOCs (Volatile Organic Compounds) waste gas purification device | |
| CN104984638A (en) | Multiple effect integrated waste gas purification system | |
| CN201015727Y (en) | Organic waste gases or stench processing system | |
| CN103980971A (en) | Methane treatment method and methane treatment system | |
| CN108211686A (en) | A kind of tail gas photooxidation cracking purification method | |
| CN105771595A (en) | Industrial waste gas in-depth purifying treatment system | |
| CN107983120A (en) | A kind of intelligent tail gas photooxidation cracking treating device using oil gas purification techniques | |
| CN112717679A (en) | Organic waste gas multistage purification equipment and process integrating regenerative oxidation function | |
| CN107537293A (en) | A kind of closed cycle bacterial desulfurization and the method for reclaiming elemental sulfur | |
| CN110538559B (en) | Waste gas treatment process for workshop discharge in biopharmaceutical industry | |
| CN208449008U (en) | A kind of combined type organic waste-gas purification and recyclable device | |
| CN203265252U (en) | Device for restoration of soil polluted by persistent organic pollutants | |
| CN206240271U (en) | A kind of double-fluidized-bed absorption and desorption apparatus | |
| CN106076114B (en) | A kind of smoke processing system and method | |
| CN205730822U (en) | A kind of organic exhaust gas centralized processor | |
| CN110252126A (en) | Zinc cation filtration deodorization technique and system | |
| CN106861416A (en) | SO in removing industrial waste gas2And NOXTechnique | |
| CN212790409U (en) | Waste gas treatment device for coal chemical industry sewage treatment | |
| CN206198954U (en) | A kind of processing unit of pernicious gas | |
| CN205435256U (en) | Fermentation workshop deodorizing device | |
| CN113713589A (en) | Advanced treatment method of high-sulfur ammonia organic waste gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 215000 no.255-2, Huajin Road, Tong'an Town, high tech Zone, Suzhou City, Jiangsu Province Applicant after: Suzhou Qingxi Environmental Protection Technology Co., Ltd. Address before: 215000 room 505, building 3, No.1, Qianzhu Road, Yuexi street, Wuzhong Economic Development Zone, Suzhou City, Jiangsu Province Applicant before: Suzhou Qingxi Environmental Protection Technology Co., Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |